Carrier 50KQA Product information

Brand: Carrier

Model: 50KQA

Category: Heat pumps

Type: Product information

Single-Package Console Water

Source Heat Pump with self-

contained line voltage thermostats.

• Wide application use with operating

temperature range from 40 F to

100 F

• Thermostatic expansion valve

(TXV) provides efficient and reliable

refrigerant flow

• Spring mounted compressors for

quiet operation

• Sloped top cabinet with powder

paint finish

• Right or left hand piping connection

• Multiple unit-mounted and remote

thermostat options

• Adaptable cabinet and subbase

configurations

• Factory-mounted flow regulators and

control valves for easy installation

• Flexible and reliable controls

accommodate all systems

Features/Benefits

Carrier’s Aquazone™

console water source heat

pumps are a flexible,

attractive alternative for all

finished interior space, under

window style installations.

Operating efficiency

Carrier Aquazone water source heat

pumps (WSHP) are designed for quali-

ty and performance excellence over

their lifetime. Models offer cooling

EERs (Energy Efficiency Ratio) to

12.8, and heating COPs (Coefficient

of Performance) to 4.6, which are

among the highest in the industry.

Quiet operation

The Carrier Console WSHP provides

exceptionally quiet operation for maxi-

mum comfort.

50KQA, KQD

Console Water Source Heat Pumps

1/2 to 11/2 Nominal Tons

Product

Data

Design flexibility

Aquazone™ Console WSHP units are

offered in 5 capacity sizes and in 3 dif-

ferent voltages to meet individual

zone needs efficiently and effectively.

Standard and Low temperature units

are available to suit a variety of applica-

tion requirements.

Safe, reliable operation

Standard safety features include: high

and low pressure monitoring and field

selectable water and air coil freeze pro-

tection sensing. All safety controls may

be reset at the thermostat. Each unit is

tested and run at the factory to assure

proper operation of all components

and safety switches.

All components are carefully

designed and selected for endurance,

durability, and carefree day-to-day

operation.

The water-to-refrigerant heat

exchanger has copper inner and steel

outer tubing which is painted on the

outside to provide corrosion resistance

protection. Cupronickel heat exchang-

ers are available and should be used on

all open loop applications.

Units are ARI (Air Conditioning &

Refrigeration Institute) Standard

320-93 certified and UL (Underwrit-

ers’ Laboratories) and CSA (Canadian

Standards Association) listed.

Installation ease

The unit is packaged for simple, low

cost handling, with minimal time re-

quired for installation. The console unit

arrives at the jobsite fully assembled to

minimize installation time and reduce

installation cost. All units are pre-wired

and factory charged with refrigerant.

Water connections are available in a

variety of configurations direct from

the factory. The standard configuration

is 5/8 in. OD Sweat connections for

maximum flexibility in the field. Both

FPT and MPT are available as factory-

installed options to improve installation

efficiency. Additionally, factory-

installed motorized water shutoff

valves are available for use on energy

conserving systems employing a

variable pumping technique.

The standard electrical connections

are made quickly and directly to a pow-

er distribution terminal block. To fur-

ther improve installation efficiency,

fused or unfused disconnect switch,

as well as a 20 amp plug and cord are

available as factory-installed options.

A 5/8 in. ID vinyl condensate con-

nection is provided for connection to

the field-installed condensate line.

Compact cabinet design dimen-

sions are 10 in. deep, 48 in. wide

and 24 in. tall (with 3 in. subbase).

For flexibility, the controls can be

mounted on the top right or left side.

Additionally, the sloped top design

discourages the use of the unit as a

shelf or coffee holder, preventing air

blockage and any spills from damaging

the unit.

No-fuss maintenance and

serviceability

Regular maintenance or service to the

console WSHP units require little time.

Large service access panels enable

quick inspection for problem solving

and the control box swings down for

easy access to the controls.

Fan motor sleeve bearings are

permanently lubricated for worry-free

performance. If the unit does require

service, an easily removable cabinet

and slide out fan section makes access

simple.

Refrigerant circuit protection is de-

signed to result in fewer service calls.

Units are equipped with easily accessi-

ble service access ports on both the

suction and the discharge refrigerant

lines for on-site testing and environ-

mentally correct refrigerant recovery.

Filter racks provide easy filter access

for cleaning.

Maximum control flexibility

Aquazone water source heat pumps

provide reliable control operation using

a standard microprocessor board. Flex-

ible alternatives for many direct digital

control (DDC) applications include the

Carrier Comfort Network (CCN) and

open protocol systems.

Carrier’s Aquazone standard unit

solid-state control system, the Com-

plete C, provides control of the unit

compressor, reversing valve, fan, safety

features, and troubleshooting fault indi-

cation features. The Complete C is

one of the most user friendly, low cost,

and advanced control boards found in

the WSHP industry. Many features are

field selectable to provide the ultimate

in field installation flexibility. The

overall features of this standard control

system include:

50VA transformer — Assists in

accommodating accessory loads.

Table of contents

Page

Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3

Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

ARI Capacity Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8

Base Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-13

Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14,15

Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16-21

Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22-24

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Typical Wiring Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26-31

Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32-34

Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35-37

NRTL/C

As an ENERGY STA R ® Partner,

Carrier Corporation has deter-

mined that this product meets

the ENERGY S

TA R guidelines

for energy efficiency.

Anti-short cycle timer — Provides a

minimum off time to prevent the unit

from short cycling. The 5-minute timer

energizes when the compressor is

deenergized, resulting in a 5-minute

delay before the unit can be restarted.

Random start relay — Ensures a

random delay in energizing each differ-

ent WSHP unit. This option minimizes

peak electrical demand during start-up

from different operating modes or after

building power outages.

High and low pressure refrigerant

protection — Safeguards against

unreliable unit operation and prevents

refrigerant from leaking.

Condensate overflow sensor —

Electronic sensor mounted to the drain

pan. When condensate pan liquid

reaches an unacceptable level, the unit

is automatically deactivated and placed

in a lockout condition. The sensor

recognizes thirty continuous seconds

of overflow as a fault condition.

High and low voltage protection —

Safety protection for excessive or low

voltage conditions.

Automatic intelligent reset — Unit

shall automatically restart 5 minutes

after shutdown if the fault has cleared.

Should a fault occur 3 times sequen-

tially, lockout will occur.

Accessory output — In applications

such as variable speed pumping, a

24 V output cycles a motorized water

valve or damper actuator with

compressor.

Performance Monitor (PM) —

Unique feature monitors water temper-

atures to warn when the heat pump

is operating inefficiently or beyond

typical operating range. A field select-

able switch initiates a warning code on

the unit display.

Water coil freeze protection

(selectable for water or anti-

freeze) — Field selectable switch for

water and water/glycol solution sys-

tems initiates a fault when tempera-

tures exceed the selected limit for

30 continuous seconds.

Air coil freeze protection (check

filter operation) — Field selectable

switch for assessing excessive filter

pressure drop initiates a fault when

temperatures exceed the selected limit

for 30 continuous seconds.

Alarm relay setting — Selectable

24 V or pilot duty dry contact provides

remote alarm activation.

Electric heat option — Output pro-

vided on the controller for operating

two stages of emergency electric heat.

Service test mode with diagnostic

LED (light-emitting diode) — Test

mode allows service personnel to

check the operation of the WSHP and

control system efficiently. Upon enter-

ing test mode, time delays speed up,

and the Status LED flashes a code

indicating the last fault. This mode

provides easy fault diagnosis; based on

the fault code the status LED flashes,

Carrier provided troubleshooting tables

provide easy reference to typical

problems.

LED visual output — An LED panel

indicates high pressure, low pressure,

low voltage, high voltage, air/water

freeze protection, condensate over-

flow, and control status.

Carrier PremierLink™ control-

ler adds reliability, efficiency,

and simplification

The PremierLink direct digital control-

ler can be ordered as a factory-installed

option. Designed and manufactured

exclusively by Carrier, the controller

can be used to actively monitor and

control all modes of operation as well

as monitor the following diagnostics

and features: unit number, zone tem-

perature, zone set point, zone humidity

set point, discharge air temperatures,

fan status, stages of heating, cooling

stages, outdoor-air temperature,

leaving-air temperature, leaving water

temperature, alarm status, and alarm

lockout condition.

This controller has 38.4K baud

communications capability and is com-

patible with ComfortLink™ Controls,

CCN and ComfortVIEW™ Software.

The Scrolling Marquee and Navigator

are optional tools used for program-

ming and monitoring the unit for opti-

mal performance. Adding the Carrier

CO2 sensor in the conditioned space

provides ASHRAE 62-99 compliance

and Demand Control Ventilation

(DCV). A DCV control strategy is espe-

cially beneficial for a water source heat

pump system to minimize the energy

used to condition ventilation air. In

combination with energy efficient

Aquazone units, DCV may be the most

energy efficient approach ever devel-

oped for a water source heat pump

system.

The PremierLink peer-to-peer,

Internet ready communicating control

is designed specifically for Constant

Volume and Variable Volume Tempera-

ture applications. This comprehensive

controls system allows water source

heat pumps to be linked together, cre-

ating a fully functional HVAC (heating,

ventilation, and air conditioning) auto-

mation system.

Features/Benefits (cont)

LEGEND

*Determined by looking at the unit from the front.

†Cv of 3.5 and MOPD of 20 psi.

**Cv of 2.5 and MOPD of 50 psi.

††Available with Complete C only.

***Sizes 007, 009, and 012 only.

†††20A plug and cord are not available in 265V units.

ARI* capacity ratings

LEGEND

*Air Conditioning & Refrigeration Institute.

NOTES:

1. Ratings are in accordance with ARI Standard 320-93.

2. Cooling Standard: 80 F db, 67 F wb indoor entering air temperature,

85 F entering water and 95 F leaving water temperatures.

3. Heating Standard: 70 F db indoor entering air temperature, and 70 F

entering water temperature.

Cv —Coefficient of Velocity

MOPD —Maximum Operating Pressure Differential

UNIT 50KQ

COOLING HEATING AIRFLOW

CFM

WATER

FLOW RATE

GPM

PRESSRUE

DROP

ft wg

TC TSC THR kW EER TC THA kW COP

007 6,800 5,032 8,500 0.531 12.8 8,600 6,958 0.548 4.6 280 1.7 2.3

009 9,000 6,667 11,500 0.744 12.1 11,600 9,215 0.791 4.3 280 2.3 4.2

012 11,800 8,160 15,000 0.922 12.8 14,000 10,797 1.052 3.9 375 3.0 9.4

015 15,000 10,959 19,000 1.200 12.5 17,100 13,395 1.222 4.1 400 3.8 3.0

019 17,600 12,361 22,500 1.467 12.0 21,000 16,058 1.620 3.8 430 4.5 4.2

CFM —Cubic Feet Per Minute

COP —Coefficient of Performance

db —Dry Bulb Temperature

EER —Energy Efficiency Ratio

GPM —Gallons Per Minute

kW —Total Power Input (Kilowatt Hours)

TC —Total Capacity (Btuh)

THA —Total Heat of Absorption (Btuh)

THR —Total Heat of Rejection (Btuh)

TSC —Total Sensible Capacity (Btuh)

wb —Wet Bulb Temperature

Model number nomenclature

Size – Tons

007 –1/2

009 –3/4

012 –1

015 –1-1/4

019 –1-1/2

50 KQA 007 L C F 3 0 1 A A

50 –Carrier Prefix

Voltage

1–115V/1 Ph/60 Hz***

3– 208/230V/1 Ph/ 60 Hz

4–265V/1 Ph/60 Hz†††

Packaging

1–Domestic

Power Connection

A–Field Connected, Hard Wire

B–20A Plug

D–Disconnect Switch & 15A Fuse

F–Disconnect Switch, Non-Fused

H–20A Plug, Cord Receptacle, Disconnect Switch, 15A Fuse

K–20A Plug, Cord Receptacle, Disconnect Switch, No Fuse

Revision Code

0–Current Revision – Water Circuit Options

Controls

A–Manual Changeover with Complete C Microprocessor Board

B–Manual Changeover with Deluxe D Microprocessor Board

C–Automatic Changeover with Complete C Microprocessor Board

D–Automatic Changeover with Deluxe D Microprocessor Board

P–PremierLink™ DDC Control††

R–Remote Thermostat with Complete C

S–Remote Thermostat with Deluxe D

Series

KQA –Standard Temperature Range (60 to 95 F)

KQD –Low Temperature Range (40 to 110 F)

Cabinet & Subbase Options

Option Cabinet Subbase

A Bottom Return 3″ Subbase

B Bottom Return 3″ Subbase w/Motorized Damper

C Bottom Return 5″ Subbase w/Motorized Damper

D Bottom Return No Subbase

E Bottom Return, Control Door Lock 3″ Subbase

F Bottom Return, Control Door Lock 3″ Subbase w/Motorized Damper

G Bottom Return, Control Door Lock 5″ Subbase w/Motorized Damper

H Bottom Return, Control Door Lock No Subbase

J Front Return No Subbase

K Front Return, Control Door Lock No Subbase

L No Cabinet 3″ Subbase

M No Cabinet 3″ Subbase w/Motorized Damper

N No Cabinet 5″ Subbase w/Motorized Damper

P No Cabinet No Subbase

Q No Cabinet 5″ Subbase

R Bottom Return 5″ Subbase

S Bottom Return, Control Door Lock 5″ Subbase

Heat Exchanger

Connection Copper Cupronickel

1/2″ Female Pipe Thread F G

1/2″ Sweat S (Std) T

1/2″ Male Pipe Thread M N

Water Connections/Valve Options*

Connection Side

Left Right

No Valve Options L R

Standard Water Control Valve†AJ

High MOPD Water Control Valve** B K

Autoflow Regulator Sized for 2.5 GPM per Ton C M

Autoflow Regulator Sized for 3.0 GPM per Ton D N

Standard Control Valve with 2.5 GPM/Ton Regulator E P

Standard Control Valve with 3.0 GPM/Ton Regulator F Q

High MOPD Control Valve with 2.5 GPM/Ton Regulator G S

High MOPD Control Valve with 3.0 GPM/Ton Regulator H T

BASE UNIT 50KQA, KQD 007 009 012 015 019

NOMINAL CAPACITY (tons) 1/23/411

1/411/2

BLOWER

Motor Horsepower

Wheel Size D x W (in.) 2 each

1/20

51/4 x 61/4

1/20

51/4 x 61/4

1/15

51/4 x 61/4

1/15

51/4 x 61/4

1/6

51/4 x 61/4

FILTER SIZE (in.) Bottom Return 8 x 291/2 x 3/88 x 291/2 x 3/88 x 291/2 x 3/88 x 291/2 x 3/88 x 291/2 x 3/8

FILTER SIZE (in.) Front Return 7 x 291/2 x 1/87 x 291/2 x 1/87 x 291/2 x 1/87 x 291/2 x 1/87 x 291/2 x 1/8

UNIT WEIGHT (lb)

Shipping

Operating

158

151

162

154

172

164

178

168

183

174

REF. TO AIR HEAT EXCHANGER

Face Area (sq. ft)

No. of Rows Deep

Copper Tube Size O.D. (in.)

No. of Fins/in.

1.44

3/8

1.44

3/8

1.44

3/8

1.81

3/8

1.81

3/8

REFRIG. CHARGE (R-22)/CKT (oz.)

No. of Circuits

UNIT CABINET W/STAND. SUBBASE

W x H x D (in.) 48 x 24 x 10 48 x 24 x 10 48 x 24 x 10 48 x 24 x 10 48 x 24 x 10

WATER IN/OUT SIZE O.D. SWEAT (in.) 5/85/85/85/85/8

CONDENSATE SIZE I.D. VINYL (in.) 5/85/85/85/85/8

Physical data

Factory-installed options

Cupronickel heat exchangers are available for higher

corrosion protection for applications such as open tower,

geothermal, etc. Consult the water quality guidelines for

proper application and selection of this option.

Thermostat options include a unit mounted Manual

Changeover (MCO) or Auto Changeover (ACO) thermo-

stat. The temperature set point knob and push button

switches for fan speed and cool/heat mode (MCO) selec-

tion are conveniently located on the top. The thermostat

senses the return-air temperature. The thermostat sends

the appropriate signal to the controller for cooling or heat-

ing mode of operation.

Options R and S allow connection to a remote wall-

mounted thermostat. The Complete C controller requires a

heat pump thermostat. The Deluxe D controller can be

configured for heat pump or heat/cool thermostat.

Cabinet options include a locking control panel for

added security. A bottom or front return with left or right

hand configurations for ease of installation. Available with

3 or 5 in. subbase, with or without motorized damper.

Motorized fresh air damper with the unit-mounted

thermostat. Opens when LOW or HIGH fan speed selec-

tions are made from the push button switches. When

STOP or FAN ONLY selections are made the spring return

on the damper motor closes the damper. With remote ther-

mostat the motorized fresh air damper opens when the fan

is running.

Piping connections can be provided on either the right

or left hand side of the unit, for easy installation. Orienta-

tion is determined by facing the unit from the front side.

Automatic flow regulators include internally mounted

2.5 or 3.0 gpm per ton automatic flow regulating valves

for easier installation.

Two-way motorized control valve can be provided with

a copper or cupronickel heat exchanger for applications

involving open type systems or variable speed pumping.

This valve will slowly open and close in conjunction with the

compressor operation to shut off or turn on water to the

unit. Standard and high maximum operating pressure dif-

ferential (MOPD) valve options are available for maximum

installation flexibility. Standard two-way valve performance

includes Cv of 3.5 and MOPD of 20 psi. High MOPD valve

performance includes Cv of 2.5 and MOPD of 50 psi.

Deluxe D control system provides the same functions

as the Complete C while incorporating additional flexibility

and functions to include:

Thermostat input capabilities — Accommodate emergency

shutdown mode and night setback with override (NSB)

potential. Night setback from low temperature thermostat

with 2-hour override is initiated by a momentary signal

from the thermostat.

Compressor relay staging — Used with dual stage units

(units with 2 compressors and 2 D controls) or in master/

slave applications.

Boilerless electric heat control system — Allows automatic

changeover to electric heat at low loop water temperature.

Intelligent reversing valve operation — Minimizes reversing

valve operation for extended life and quiet operation.

Thermostat type select (Y, O or Y, W) — Provides ability to

work and select heat pump or heat/cool thermostats (Y, W).

Reversing valve signal select (O or B) — Provides selection

for heat pump O/B thermostats.

Dehumidistat input — Provides operation of fan control for

dehumidification operation.

Multiple units on one thermostat/wall sensor — Provides

for communication for up to three heat pumps on one

thermostat.

Boilerless changeover temperature — Provides selection of

boilerless changeover temperature set point.

Accessory relays — Allow configuration for multiple appli-

cations including fan and compressor cycling, digital night

setback (NSB), mechanical night setback, water valve oper-

ation, and outside air damper operation.

Night low limit — If the unit operation is turned OFF from

either the push button switches, remote thermostat or the

energy management system, it is possible that the space

temperature could drop uncontrollably. The Night Low

Limit feature, with Deluxe D controller, helps maintain the

space temperature at a level that is the best compromise

between energy consumption and a safe space tempera-

ture. A thermostat located near the return air filter

activates the blower and compressor operation when the

space temperature falls below 50 F. When return air tem-

perature is raised above 55 F the compressor and blower

stop.

Override function — An Override function is available for

units operating in occupied/unoccupied mode under the

control of an external timeclock or an energy management

system. A contact closure from the timeclock or energy

management system shorts the NSB and C terminal on the

Deluxe D controller signaling an unoccupied mode.

For units with the unit-mounted thermostat, pressing

override switch (located under control access door) will

override the unoccupied mode and allow the occupied

mode of operation to continue for a period of two hours.

The units with the remote wall-mounted thermostat

require a digital thermostat with the override function. In

unoccupied mode an accessory relay is energized on the

Deluxe D controller. The NO/NC contacts of the relay can

be used as appropriate input to the digital thermostat to

signal occupied/unoccupied mode. The thermostat selects

cooling/heating set points based on occupied/unoccupied

mode.

PremierLink™ controller is compatible with the Carrier

Comfort Network (CCN) and other building automation

systems (BAS). This control is designed to allow users the

access and ability to change factory-defined settings thus

expanding the function of the standard unit.

Options and accessories

50KQA,KQD CONTROL OPTIONS TABLE

LEGEND

Field-installed accessories

Carrier’s line of Aquazone™ thermostats (used with

remote thermostat units) are both attractive and multi-

functional, accommodating stand-alone water source heat

pump installations.

Programmable 7-day thermostat — Offers 2-stage heat,

2-stage cool, auto changeover, 7-day programmable with

copy command, 4 settings per day, fully electronic, 24 vac,

backlit LCD, keypad lockout, no batteries required,

5-minute compressor protection, NEVERLOST™ memory,

3 security levels, temperature display in degrees F or C.

Programmable 7-day light-activated thermostat — Offers

same features as the 7-day programmable thermostat and

includes occupied comfort settings with lights on, unoccu-

pied energy savings with lights off.

Programmable 7-day flush-mount thermostat —

Offers

same features as the 7-day programmable thermostat and

includes locking coverplate with tamper proof screws, flush

to wall mount, holiday/vacation programming, set point

limiting, dual point with adjustable deadband, O or B termi-

nal, and optional wall or duct-mounted remote sensor.

Programmable 5-day thermostat —

Offers 2-stage heat,

2-stage cool, auto changeover, 5-minute built-in compres-

sor protection, locking cover included, temperature display

in degrees F or C, keypad lockout, backlit display, 5-1-1

programming, O or B terminal, dual set point with adjust-

able deadband, configurable display, self-prompting pro-

gram, 4 settings per day.

Non-programmable thermostat —

Offers 2 heat stages,

2 cool stages, auto changeover, 5-minute built in compres-

sor protection, locking cover included, temperature display

in degrees F or C, keypad lockout, large display, back-lit

display, O or B terminal, dual set point with adjustable

deadband, backplate with terminals.

Aquazone system control panel includes a pre-

programmed, easy to use, Carrier Comfort Controller set

up for a WSHP system.

• Coordinates, monitors, and controls all WSHP units

and ancillary equipment including cooling towers, boil-

ers, and system pumps.

• 50RLP model nomenclature is used to customize the

panel to control all WSHP system requirements.

• Panel can be ordered to include 2, 4, 6, or 8 stages of

system heat rejection.

• Panel can be ordered to include 2, 4, 6, or 8 stages of

system heat addition.

• Panel can be ordered with unique WSHP zone operation

capabilities for stand alone systems (i.e., non-communicating)

to control 10 or 18 zones of WSHP units.

• Panel can be ordered to control variable frequency cool-

ing tower fan operation.

• System pumping operation can be configured for start/

stop, lead/lag, or variable frequency pump operation.

• Direct Digital Control compatible using the Carrier

Comfort Network (CCN) and WSHP units utilizing

PremierLink CCN controllers.

Fire-rated hoses are 2 ft long and have a fixed MPT on

one end and a swivel with an adapter on the other end.

Hose kits are provided with both a supply and return hose

and can be either stainless steel or galvanized. Five sizes

are available (1/2, 3/4, 1, 11/4, 11/2 in.).

Ball valves (brass body) used for shutoff and balancing

water flow. Available with memory, memory stop, and

pressure temperature ports. UL-listed brass body, ball and

stem type with Teflon seats and seals. Five sizes are avail-

able (1/2, 3/4, 1, 11/4, 11/2 in.).

Y strainers (bronze body) are “Y” type strainers with a

brass cap. Maximum operating pressure rating of

450 psi. Strainer screen made of stainless steel. Available

with blow down valves. Five sizes are available (1/2, 3/4, 1,

11/4, 11/2 in.).

Solenoid valves (brass body) offer 3.5 watt coil,

24 volt, 50/60 Hz, 740 amps inrush, .312 amps holding.

Slow operation for quiet system application. Five sizes are

available (1/2, 3/4, 1, 11/4, 11/2 in.).

Hose kit assemblies provide all the necessary compo-

nents to hook up a water-side system. Supply hose includes

a ported ball valve with pressure temperature (P/T) plug

ports, flexible stainless steel hose with swivel and nipple.

Return hose includes a ball valve, preset automatic balanc-

ing valve (gpm) with two P/T ports, flexible stainless steel

hose with a swivel and nipple, balancing valve, and low-

pressure drop water control valve.

Remote sensors are available for Aquazone flush mount

thermostats. Sensors are available for wall (wired and wire-

less) or duct mounted applications.

PremierLink™ accessories are available to provide a

fully integrated WSHP DDC system. Accessories include

supply air temperature sensors (with override and/or set-

point adjustment), communicating room sensors, CO2 sen-

sors (for use in demand control ventilation), and linkage

thermostats (to control multiple units from one thermostat).

OPTION CONTROLLER THERMOSTAT FUNCTIONS TRANSFORMER

AComplete C MCO —50 VA

BDeluxe D MCO NIGHT LOW LIMIT 2-HR OVERRIDE 75 VA

CComplete C ACO —50 VA

DDeluxe D ACO NIGHT LOW LIMIT 2-HR OVERRIDE 75 VA

PComplete C with PremierLink™LINKAGE DDC SYSTEM 50 VA

RComplete C REMOTE —50 VA

SDeluxe D REMOTE NIGHT LOW LIMIT2-HR OVERRIDE 75 VA

ACO —Auto Changeover

MCO —Manual Changeover

Options and accessories (cont)

PREMIERLINK™ COMMUNICATING CONTROL

COOL

HEAT

AUTO

5-DAY PROGRAMMABLE/NON-PROGRAMMABLE

AUTO

COOL

HEAT

Carrier

CARRIER AQUAZONE™ THERMOSTATS

(FOR USE WITH REMOTE THERMOSTAT UNITS)

7-DAY PROGRAMMABLE/LIGHT-ACTIVATED

PROGRAMMABLE 7-DAY PROGRAMMABLE FLUSH MOUNT

Base unit dimensions

NOTE: All measurements in inches. Measurements in parentheses are in millimeters.

50KQA,KQD BOTTOM RETURN CABINET DIMENSIONS — RIGHT HAND PIPING

30°

9.5

(241) 3

(76)

(127)

1.5

(38)

(610)

(406)

FRONT VIEW

DAMPER OPENING*

(1219)

1.63

(41)

11.75

(298) 9.75

(248)

0.81

(21)

(533)

(76)

REAR VIEW

Control Access Door

AIR INLET AREA Air

Inlet

Discharge

Air

1.5

(38)

3.5

(89)

0.75

(19)

R.H. Pipe &

Electric Area

REAR

ACCESS

1(25)

1 (25)

4.5

(114)

(508)

(254)

(203)

(1219)

9.5

(241)

*Optional 5-in. (127) sub-

base will increase damper

opening to 3.63-in. (92)

high and increase overall

unit height by 2 in. (51).

Base unit dimensions (cont)

30°

9.5

(241) 3

(76)

1.5

(38)

1.5

(38)

(610)

12.5

(318)

FRONT VIEW

DAMPER OPENING*

(1219)

1.63

(41)

11.75

(298) 9.75

(248)

0.81

(21)

REAR VIEW

Control Access Door

AIR INLET AREA Air

Inlet

Discharge

Air

(89)

(254)

(1219)

1.5

(38)

3.5

9.5

(241)

1(25)

4.5

(114)

(533)

(76)

1 (25)

REAR

ACCESS

(508)

L.H. Pipe &

Electric Area 8

(203)

0.75

(19)

NOTE: All measurements in inches. Measurements in parentheses are in millimeters.

50KQA,KQD BOTTOM RETURN CABINET DIMENSIONS — LEFT HAND PIPING

*Optional 5-in. (127) subbase

will increase damper opening

to 3.63-in. (92) high and

increase overall unit height by

2 in. (51).

No damper available with front return option.

41.75

(1060)

9.5

(241)

(1219)

1.5

(38)

BLOCK OFF PLATE ON

BOTTOM OF CHASSIS

R.H. PIPE &

ELECTRIC AREA

0.75 (19)

3.5

(89)

30°

(254)

1.5

(38)

Filter

(1219)

(533)

FRONT VIEW

Control Access Door

(127)

(406)

Air

Discharge

Air

Inlet

(533)

(1219)

REAR VIEW

REAR

ACCESS

1 (25)

4.5

(114)

(25)

(508)

NOTE: All measurements in inches. Measurements in parentheses are in millimeters.

50KQA,KQD FRONT RETURN CABINET DIMENSIONS — RIGHT HAND PIPING

Base unit dimensions (cont)

No damper available with front return option.

L.H. PIPE &

ELECTRIC AREA

41.75

(1060)

9.5

(241)

(1219)

1.5 (38)

0.75 (19)

BLOCK OFF PLATE ON

BOTTOM OF CHASSIS

3.5

(89)

30°

(254)

1.5

(38)

Filter

(1219)

(533)

FRONT VIEW

Control Access Door

1.5

(38)

12.5

(318)

Air

Inlet

Air

Discharge

(533)

(1219)

REAR VIEW

1 (25)

(25)

4.5

(114)

REAR

ACCESS

(508)

NOTE: All measurements in inches. Measurements in parentheses are in millimeters.

50KQA,KQD FRONT RETURN CABINET DIMENSIONS — LEFT HAND PIPING

BLOWER DECK

BLOWER ACCESS PANEL

CONTROL BOX

COMPRESSOR

ACCESS

PANEL

(1041)

20.5

(521)

3.5

(89)

30 °

3.375 (86)

2.125 (54)

1(25)

4(182)

6.5 (165)

(406)

13.5

(343)

1.25

(32)

3.2 (80)

9.5 (241)

CONDENSATE

RELIEF

POWER

SUPPLY IN

SIDE VIEW (LH) FRONT VIEW (LH)

30 °

3.375 (86)

2(51)

4(102)

5(127)

(406)

1.5(38)

9.5 (241)

1(25)

CONDENSATE

RELIEF

FRONT VIEW (RH)

SIDE VIEW (RH)

POWER

SUPPLY IN

(330)

1(25)

0.75 (19)

(51)

3.5

(89)

2(51)

BLOWER DECK

BLOWER ACCESS PANEL

CONTROL BOX

COMPRESSOR

ACCESS

PANEL

(1041)

20.5

(521)

WATER

OUT

WATER

OUT

0.75 (19)

0.75 (19) 0.75 (19)

NOTE: All measurements in inches. Measurements in parentheses are in millimeters.

50KQA,KQD CHASSIS DIMENSIONS — 007, 009, 012, 015, 019

I Determine the actual cooling and heating

loads at the desired dry bulb and wet bulb

conditions.

Assume cooling load at desired dry bulb 80 F and

wet bulb 66 F conditions are as follows:

Given:

Total Cooling (TC). . . . . . . . . . . . . . .11,100 Btuh

Sensible Cooling (SC) . . . . . . . . . . . . .7,100 Btuh

Entering-Air Temperature db . . . . . . . . . . . . 80 F

Entering-Air Temperature wb . . . . . . . . . . . . .66 F

II Determine the following design parameters.

Determine entering water temperature, water flow

rate (GPM), airflow (CFM), water flow pressure drop

and design wet and dry bulb temperatures. Airflow

CFM should be between 300 and 450 CFM per ton.

Unit water pressure drop should be kept as close as

possible to each other to make water balancing eas-

ier. Enter the 50KQA012 Performance Data tables

and find the proper indicated water flow and water

temperature.

For example:

Entering Water Temp . . . . . . . . . . . . . . . . . 90 F

Water Flow (Based upon

12 F rise in temp) . . . . . . . . . . . . . . . . . 3.0 GPM

Airflow Cfm . . . . . . . . . . . . . . . . . . . . . 325 Cfm

III Select a unit based on total cooling and total

sensible cooling conditions. Unit selected

should be closest to but not larger than the

actual cooling load.

Enter tables at the design water flow and water

temperature. Read the total and sensible cooling

capacities.

NOTE: Interpolation is permissible, extrapolation is

not.

For example:

Enter the 50KQA012 Performance Table at design

water flow and water temperature. Read Total

Cooling, Sensible Cooling and Heat of Rejection

capacities:

Total Cooling . . . . . . . . . . . . . . . . . .11,500 Btuh

Sensible Cooling . . . . . . . . . . . . . . . . 7,300 Btuh

Heat of Rejection . . . . . . . . . . . . . . .15,000 Btuh

NOTE: It is quite normal for water source heat

pumps to be selected on cooling capacity only since

the heating output is usually greater than the cooling

capacity. Heating capacity is selected based on

different entering water conditions than cooling

capacity.

IV Determine the correction factors associated

with the variable factors of dry bulb and wet

bulb using the Corrections Factor tables

found in this book.

Using the following formulas to determine the cor-

rection factors of dry bulb and wet bulb:

a) Corrected Total Cooling = tabulated total cooling

x wet bulb correction x airflow correction.

b) Corrected Sensible Cooling = tabulated sensible

cooling x wet/dry bulb correction x airflow

correction

V Determine entering air and airflow correction

using the Corrections Factor tables found in

this book.

The nominal airflow for 50KQA012 is 375 cfm.

The design parameter is 325 cfm.

325/375 = 87% of nominal airflow

Use the 87% row in the Nominal Cfm Correction

table.

The Entering Air Temperature wb is 66 F. Use the

66.2 F row in the Entering Air Correction table.

Using the following formulas to determine the cor-

rection factors of entering air and airflow correction:

Compare the corrected capacities to the load

requirements established in Step I. If the capacities

are within 10% of the load requirements, the equip-

ment is acceptable. It is better to undersize than

oversize as undersizing improves humidity control,

reduces sound levels and extends the life of the

equipment.

VI Water temperature rise calculation and

assessment.

Calculate the water temperature rise and assess the

selection using the following calculation:

For example, using the Corrected Heat of Rejection

from the last step:

If the units selected are not within 10% of the load

calculations, review what effect changing the GPM,

water temperature and/or airflow will have on the

corrected capacities. If the desired capacity cannot

be achieved, select the next larger or smaller unit

and repeat Steps I through VI.

Table Ent Air Airflow Corrected

Corrected

Total Cooling = 11,500 x 0.994 x 0.98 = 11,202

Corrected

Sensible Cooling = 7,300 x 1.030 x 0.964 = 7,248

Corrected

Heat of Rejection = 15,000 x 0.982 x 0.978 = 14,405

Actual Temperature

Rise =Correction of Heat Rejection

GPM x 500

Actual Temperature

Rise =14,405 =9.6 F

3.0 x 500

Selection procedure (with 50KQA012 example)

VII ARI/ISO/ASHRAE 13256-1 Conversion

Performance standard ARI/ISO/ASHRAE 13256-1

became effective on January 1, 2000 and replaced

the existing ARI Standards 320 Water-Loop Heat

Pumps (WLHP), 325 Ground-Water Heat Pumps

(GWHP), and 330 Ground-Loop Heat Pumps

(GLHP).

The ARI/ISO Standard incorporates a consistent

rating methodology for including fan and pump

energy for calculating cooling capacity, heating

capacity, and energy efficiency ratios (EER). This

simplifies the use of rating data for heat pump per-

formance modeling in seasonal energy analysis cal-

culations, and allows for direct rating comparisons

across applications.

a) ISO Capacity and Efficiency Equations

The following equations are used to calculate and

correct cooling capacity, heating capacity, and

respective EER:

ISO Cooling Capacity = (Cooling Capacity in

Btuh) + (Fan Power Correction in Watts x 3.412)

ISO Cooling EER = (ISO Cooling Capacity in

Btuh/3.412)/(Power Input in watts – fan power

correction in watts + pump power correction in

watts) = Watts/Watts

NOTE: Do not divide ISO Cooling Capacity by

3.412 to obtain Btuh/Watts.

ISO Heating Capacity = (Heating Capacity in

Btuh) – (Fan Power Correction in Watts x 3.412)

ISO Heating EER = (ISO Heating Capacity in

Btuh/3.412)/(Power Input in watts – fan power

correction in watts + pump power correction in

watts) = Watts/Watts

NOTE: Do not divide ISO Heating Capacity by

3.412 to obtain Btuh/Watts.

Refer to English to SI conversion table in this

book.

b) Identify the design conditions corrected for air and

water conditions.

Airflow Cfm = 325 Cfm

Water Flow

(Based upon 12 F rise in temp) = 3.0 GPM

External Static Pressure = 0.0 in. wg (non-ducted

application)

Water Pressure Drop = 1.3 ft of head

Power input = 1,030 watts

Cooling Capacity = 11,202 Btuh

c) Perform Fan Power Correction Adjustment

Use the following formula to calculate Fan Power

Correction:

Fan Power

Correction = (Cfm x 0.472) x (External Static

Pressure x 249)/300 = Watts

= (325 x 0.472) x (0 x 249)/300

= 0 Watts

d) Perform Pump Power Correction Adjustment

Use the following formula to calculate Pump

Power Correction:

Pump Power

Correction = (GPM x 0.0631) x (Pressure Drop

x 2,990)/300

= Watts

= (3 x 0.0631) x

(13 x 2,990)/300

=24.5 Watts

e) Perform capacity and EER calculations

Use the following formula to calculate capacity

and EER:

ISO Cooling

Capacity = (Cooling Capacity) + (Fan Power

Correction x 3.412)

= 11,202 + (0 x 3.412)

= 11,202 Btuh

f) Perform Corrections by using the ISO Equations

ISO EER = (ISO Cooling Capacity/3.412)/

(Power Input – Fan Power Correc-

tion + Pump Power Correction)

= Watts/Watts

NOTE: Do not divide ISO Cooling Capacity by

3.412 to obtain Btuh/Watts.

= (11,203/3.412)/(1,030 – 0 + 24.5)

= 3.12 Watts/Watt

= 10.62 Btuh/Watt

50KQA,KQD007 (1/2 TON) — RATED AIRFLOW 280 CFM

LEGEND

*ARI 320 points (bold printing) are shown for comparison purposes

only. These are not certified data points.

NOTES:

1. Shaded boxed areas represent KQD units only.

2. MOPD = Maximum Operating Pressure Differential (water pres-

sure differential at unit cannot exceed MOPD or water valve cannot

close).

3. Interpolation is permissible, extrapolation is not.

4. All entering air conditions are 80 F db and 67 F wb in cooling and

70 F db in heating.

5. All performance data is based upon the lower voltage of dual volt-

age rated units. See Performance Correction Tables on page 21

for operating conditions other than those listed above.

6. ARI/ASHRAE/ISO 13256-1 (WLHP application) certified condi-

tions are 86 F EWT, 80.6 F db and 66.2 F wb in cooling and 68 F

EWT, 68 F db and 59 F wb in heating.

EWT F GPM

COOLING — EAT 80

F DB/67

F WB HEATING — EAT 70

F DB PRESSURE DROP (ft wg)

TC TSC Sensible/

Total R a tio kW THR TC kW THA

Without

Motorized

Valve

With

Motorized

Cv = 3.5

MOPD = 20 psi

With

Motorized

Cv = 2.5

MOPD = 50 psi

1.5 8.7 6.3 0.72 0.42 10.2 Operation Not Recommended 1.8 2.2 2.6

1.9 8.8 6.3 0.72 0.42 10.2 6.6 0.59 4.6 2.3 3.0 3.6

2.5 8.9 6.3 0.71 0.42 10.3 6.7 0.58 4.8 5.0 6.2 7.3

1.5 8.4 6.2 0.74 0.44 9.9 7.4 0.61 5.4 1.8 2.2 2.6

1.9 8.5 6.3 0.74 0.44 10.0 7.6 0.60 5.5 2.3 3.0 3.6

2.5 8.6 6.3 0.73 0.43 10.0 7.7 0.60 5.7 5.0 6.2 7.3

1.5 8.1 6.1 0.75 0.47 9.7 8.4 0.62 6.3 1.8 2.2 2.6

1.9 8.2 6.1 0.75 0.46 9.8 8.6 0.61 6.5 2.3 3.0 3.6

2.5 8.2 6.1 0.75 0.46 9.8 8.8 0.63 6.6 5.0 6.2 7.3

70*

1.5 7.8 6.0 0.77 0.51 9.5 9.4 0.64 7.2 1.8 2.2 2.6

1.9 7.8 6.0 0.76 0.50 9.6 9.6 0.64 7.4 2.3 3.0 3.6

2.5 7.9 6.0 0.76 0.49 9.6 9.8 0.65 7.6 5.0 6.2 7.3

1.5 7.4 5.8 0.78 0.56 9.3 10.4 0.67 8.2 1.8 2.2 2.6

1.9 7.5 5.9 0.78 0.55 9.4 10.7 0.66 8.4 2.3 3.0 3.6

2.5 7.6 5.9 0.78 0.54 9.4 10.9 0.68 8.6 5.0 6.2 7.3

85* 1.9 7.3 5.8 0.79 0.58 9.3

Operation Not Recommended

2.3 3.0 3.6

1.5 7.0 5.7 0.81 0.62 9.2 1.8 2.2 2.6

1.9 7.1 5.8 0.81 0.61 9.2 2.3 3.0 3.6

2.5 7.2 5.7 0.80 0.60 9.3 5.0 6.2 7.3

100

1.5 6.7 5.6 0.84 0.69 9.0 1.8 2.2 2.6

1.9 6.7 5.6 0.83 0.68 9.1 2.3 3.0 3.6

2.5 6.8 5.6 0.83 0.67 9.1 5.0 6.2 7.3

110

1.5 Operation Not Recommended 1.8 2.2 2.6

1.9 6.3 5.4 0.86 0.76 8.9 2.3 3.0 3.6

2.5 6.4 5.5 0.85 0.74 8.9 5.0 6.2 7.3

DB —Dry Bulb

EWT —Entering Water Temperature (F)

GPM —Gallons per Minute

MBtuh —Btuh in Thousands

TC —Total Capacity

THA —Total Heat of Absorption (MBtuh)

THR —Total Heat of Rejection (MBtuh)

TSC —Total Sensible Cooling (MBtuh)

WB —Wet Bulb

WLHP —Water Loop Heat Pump

Performance data

50KQA,KQD009 (3/4 TON) — RATED AIRFLOW 280 CFM

LEGEND

*ARI 320 points (bold printing) are shown for comparison purposes

only. These are not certified data points.

NOTES:

1. Shaded boxed areas represent KQD units only.

2. MOPD = Maximum Operating Pressure Differential (water pres-

sure differential at unit cannot exceed MOPD or water valve cannot

close).

3. Interpolation is permissible, extrapolation is not.

4. All entering air conditions are 80 F db and 67 F wb in cooling and

70 F db in heating.

5. All performance data is based upon the lower voltage of dual volt-

age rated units. See Performance Correction Tables on page 21

for operating conditions other than those listed above.

6. ARI/ASHRAE/ISO 13256-1 (WLHP application) certified condi-

tions are 86 F EWT, 80.6 F db and 66.2 F wb in cooling and 68 F

EWT, 68 F db and 59 F wb in heating.

EWT F GPM

COOLING — EAT 80

F DB/67

F WB HEATING — EAT 70

F DB PRESSURE DROP (ft wg)

TC TSC Sensible/

Total Ra ti o kW THR TC kW THA

Without

Motorized

Valve

With

Motorized

Cv = 3.5

MOPD = 20 psi

With

Motorized

Cv = 2.5

MOPD = 50 psi

1.7 10.8 7.8 0.72 0.47 12.4 Operation Not Recommended 2.3 2.8 3.4

2.3 10.9 7.8 0.72 0.45 12.4 8.1 0.66 5.9 4.3 5.3 6.3

3.0 10.9 7.8 0.72 0.44 12.4 8.2 0.67 6.0 7.2 8.9 10.5

1.7 10.4 7.6 0.73 0.51 12.2 9.0 0.70 6.7 2.3 2.8 3.4

2.3 10.5 7.6 0.73 0.49 12.2 9.3 0.70 6.9 4.3 5.3 6.3

3.0 10.5 7.7 0.73 0.48 12.2 9.4 0.71 7.0 7.2 8.9 10.5

1.7 10.0 7.4 0.74 0.56 11.9 10.2 0.73 7.7 2.3 2.8 3.4

2.3 10.1 7.5 0.74 0.55 12.0 10.4 0.73 7.9 4.3 5.3 6.3

3.0 10.2 7.5 0.74 0.54 12.0 10.6 0.74 8.1 7.2 8.9 10.5

70*

1.7 9.7 7.3 0.75 0.63 11.8 11.3 0.77 8.7 2.3 2.8 3.4

2.3 9.8 7.3 0.75 0.61 11.9 11.7 0.78 9.0 4.3 5.3 6.3

3.0 9.8 7.4 0.75 0.60 11.9 11.9 0.79 9.2 7.2 8.9 10.5

1.7 9.3 7.2 0.77 0.69 11.7 12.6 0.82 9.8 2.3 2.8 3.4

2.3 9.4 7.2 0.76 0.67 11.7 12.9 0.82 10.1 4.3 5.3 6.3

3.0 9.5 7.2 0.76 0.66 11.7 13.2 0.84 10.3 7.2 8.9 10.5

85* 2.3 9.2 7.1 0.77 0.72 11.7

Operation Not Recommended

4.3 5.3 6.3

1.7 9.0 7.0 0.78 0.77 11.6 2.3 2.8 3.4

2.3 9.0 7.0 0.78 0.74 11.6 4.3 5.3 6.3

3.0 9.1 7.0 0.77 0.73 11.6 7.2 8.9 10.5

100

1.7 8.6 6.8 0.79 0.84 11.5 2.3 2.8 3.4

2.3 8.7 6.9 0.79 0.83 11.5 4.3 5.3 6.3

3.0 8.7 6.9 0.79 0.81 11.5 7.2 8.9 10.5

110

1.7 Operation Not Recommended 2.3 2.8 3.4

2.3 8.3 6.7 0.81 0.91 11.4 4.3 5.3 6.3

3.0 8.3 6.7 0.80 0.89 11.4 7.2 8.9 10.5

DB —Dry Bulb

EWT —Entering Water Temperature (F)

GPM —Gallons per Minute

MBtuh —Btuh in Thousands

TC —Total Capacity

THA —Total Heat of Absorption (MBtuh)

THR —Total Heat of Rejection (MBtuh)

TSC —Total Sensible Cooling (MBtuh)

WB —Wet Bulb

WLHP —Water Loop Heat Pump

50KQA,KQD012 (1 TON) — RATED AIRFLOW 375 CFM

LEGEND

*ARI 320 points (bold printing) are shown for comparison purposes

only. These are not certified data points.

NOTES:

1. Shaded boxed areas represent KQD units only.

2. MOPD = Maximum Operating Pressure Differential (water pres-

sure differential at unit cannot exceed MOPD or water valve cannot

close).

3. Interpolation is permissible, extrapolation is not.

4. All entering air conditions are 80 F db and 67 F wb in cooling and

70 F db in heating.

5. All performance data is based upon the lower voltage of dual volt-

age rated units. See Performance Correction Tables on page 21

for operating conditions other than those listed above.

6. ARI/ASHRAE/ISO 13256-1 (WLHP application) certified condi-

tions are 86 F EWT, 80.6 F db and 66.2 F wb in cooling and 68 F

EWT, 68 F db and 59 F wb in heating.

EWT F GPM

COOLING — EAT 80

F DB/67

F WB HEATING — EAT 70

F DB PRESSURE DROP (ft wg)

TC TSC Sensible/

Total Ra ti o kW THR TC kW THA

Without

Motorized

Valve

With

Motorized

Cv = 3.5

MOPD = 20 psi

With

Motorized

Cv = 2.5

MOPD = 50 psi

2.3 13.8 7.3 0.53 0.67 16.1 Operation Not Recommended 5.5 6.5 7.5

3.0 13.9 7.4 0.53 0.64 16.1 9.5 0.85 6.6 9.7 11.4 13.0

4.0 14.0 7.4 0.53 0.63 16.2 9.7 0.86 6.8 16.6 19.6 22.5

2.3 13.3 7.4 0.55 0.74 15.9 10.7 0.89 7.6 5.5 6.5 7.5

3.0 13.5 7.4 0.55 0.72 15.9 10.9 0.89 7.9 9.7 11.4 13.0

4.0 13.6 7.5 0.55 0.70 16.0 11.1 0.90 8.0 16.6 19.6 22.5

2.3 12.9 7.4 0.58 0.82 15.7 12.1 0.93 8.9 5.5 6.5 7.5

3.0 13.0 7.5 0.57 0.79 15.7 12.3 0.95 9.1 9.7 11.4 13.0

4.0 13.1 7.5 0.57 0.78 15.8 12.5 0.97 9.2 16.6 19.6 22.5

70*

2.3 12.4 7.4 0.60 0.89 15.5 13.5 0.99 10.1 5.5 6.5 7.5

3.0 12.5 7.5 0.60 0.87 15.5 13.8 1.01 10.3 9.7 11.4 13.0

4.0 12.6 7.5 0.59 0.85 15.5 14.0 1.00 10.6 16.6 19.6 22.5

2.3 11.9 7.3 0.62 0.97 15.2 14.9 1.04 11.4 5.5 6.5 7.5

3.0 12.0 7.4 0.61 0.95 15.3 15.3 1.06 11.6 9.7 11.4 13.0

4.0 12.1 7.4 0.61 0.93 15.3 15.5 1.06 11.9 16.6 19.6 22.5

85* 3.0 11.8 7.3 0.62 0.99 15.2

Operation Not Recommended

9.7 11.4 13.0

2.3 11.4 7.2 0.63 1.05 15.0 5.5 6.5 7.5

3.0 11.5 7.3 0.63 1.03 15.0 9.7 11.4 13.0

4.0 11.6 7.2 0.62 1.01 15.1 16.6 19.6 22.5

100

2.3 10.9 6.6 0.61 1.14 14.8 5.5 6.5 7.5

3.0 11.0 6.7 0.60 1.12 14.8 9.7 11.4 13.0

4.0 11.1 6.7 0.60 1.10 14.8 16.6 19.6 22.5

110

2.3 Operation Not Recommended 5.5 6.5 7.5

3.0 10.5 6.0 0.57 1.20 14.6 9.7 11.4 13.0

4.0 10.6 6.0 0.57 1.19 14.6 16.6 19.6 22.5

DB —Dry Bulb

EWT —Entering Water Temperature (F)

GPM —Gallons per Minute

MBtuh —Btuh in Thousands

TC —Total Capacity

THA —Total Heat of Absorption (MBtuh)

THR —Total Heat of Rejection (MBtuh)

TSC —Total Sensible Cooling (MBtuh)

WB —Wet Bulb

WLHP —Water Loop Heat Pump

Performance data (cont)

50KQA,KQD015 (11/4 TON) — RATED AIRFLOW 400 CFM

LEGEND

*ARI 320 points (bold printing) are shown for comparison purposes

only. These are not certified data points.

NOTES:

1. Shaded boxed areas represent KQD units only.

2. MOPD = Maximum Operating Pressure Differential (water pres-

sure differential at unit cannot exceed MOPD or water valve cannot

close).

3. Interpolation is permissible, extrapolation is not.

4. All entering air conditions are 80 F db and 67 F wb in cooling and

70 F db in heating.

5. All performance data is based upon the lower voltage of dual volt-

age rated units. See Performance Correction Tables on page 21

for operating conditions other than those listed above.

6. ARI/ASHRAE/ISO 13256-1 (WLHP application) certified condi-

tions are 86 F EWT, 80.6 F db and 66.2 F wb in cooling and 68 F

EWT, 68 F db and 59 F wb in heating.

EWT F GPM

COOLING — EAT 80

F DB/67

F WB HEATING — EAT 70

F DB PRESSURE DROP (ft wg)

TC TSC Sensible/

Total Ra ti o kW THR TC kW THA

Without

Motorized

Valve

With

Motorized

Cv = 3.5

MOPD = 20 psi

With

Motorized

Cv = 2.5

MOPD = 50 psi

2.7 16.6 10.8 0.65 0.84 19.4 Operation Not Recommended 1.5 2.9 4.2

3.7 16.8 10.9 0.65 0.80 19.5 11.8 1.15 7.8 3.0 5.6 8.1

4.9 16.9 11.0 0.65 0.76 19.5 12.0 1.13 8.1 5.0 9.5 13.9

2.7 16.1 10.6 0.66 0.92 19.2 13.2 1.18 9.2 1.5 2.9 4.2

3.7 16.3 10.7 0.66 0.87 19.3 13.6 1.17 9.6 3.0 5.6 8.1

4.9 16.5 10.8 0.66 0.84 19.4 13.8 1.19 9.8 5.0 9.5 13.9

2.7 15.6 10.4 0.67 0.95 18.9 15.1 1.23 10.9 1.5 2.9 4.2

3.7 15.8 10.5 0.66 0.91 18.9 15.5 1.26 11.2 3.0 5.6 8.1

4.9 16.0 10.6 0.66 0.89 19.0 15.6 1.23 11.4 5.0 9.5 13.9

70*

2.7 15.1 10.2 0.67 1.08 18.8 17.0 1.24 12.7 1.5 2.9 4.2

3.7 15.3 10.3 0.67 1.03 18.8 17.5 1.28 13.1 3.0 5.6 8.1

4.9 15.5 10.3 0.67 1.01 18.9 17.8 1.31 13.4 5.0 9.5 13.9

2.7 14.5 10.0 0.69 1.18 18.6 18.7 1.34 14.2 1.5 2.9 4.2

3.7 14.8 10.0 0.68 1.14 18.7 19.3 1.34 14.7 3.0 5.6 8.1

4.9 14.9 10.1 0.68 1.11 18.7 19.6 1.37 15.0 5.0 9.5 13.9

85* 3.7 14.5 9.0 0.62 1.13 18.4

Operation Not Recommended

3.0 5.6 8.1

2.7 13.6 8.4 0.62 1.25 17.9 1.5 2.9 4.2

3.7 13.8 8.5 0.61 1.21 18.0 3.0 5.6 8.1

4.9 14.0 8.5 0.61 1.19 18.1 5.0 9.5 13.9

100

2.7 12.8 7.8 0.61 1.39 17.5 1.5 2.9 4.2

3.7 13.0 7.9 0.61 1.35 17.6 3.0 5.6 8.1

4.9 13.1 7.9 0.61 1.32 17.6 5.0 9.5 13.9

110

2.7 Operation Not Recommended 1.5 2.9 4.2

3.7 12.1 7.3 0.60 1.48 17.1 3.0 5.6 8.1

4.9 12.2 7.3 0.60 1.45 17.2 5.0 9.5 13.9

DB —Dry Bulb

EWT —Entering Water Temperature (F)

GPM —Gallons per Minute

MBtuh —Btuh in Thousands

TC —Total Capacity

THA —Total Heat of Absorption (MBtuh)

THR —Total Heat of Rejection (MBtuh)

TSC —Total Sensible Cooling (MBtuh)

WB —Wet Bulb

WLHP —Water Loop Heat Pump

50KQA,KQD019 (11/2 TON) — RATED AIRFLOW 430 CFM

LEGEND

*ARI 320 points (bold printing) are shown for comparison purposes

only. These are not certified data points.

NOTES:

1. Shaded boxed areas represent KQD units only.

2. MOPD = Maximum Operating Pressure Differential (water pres-

sure differential at unit cannot exceed MOPD or water valve cannot

close).

3. Interpolation is permissible, extrapolation is not.

4. All entering air conditions are 80 F db and 67 F wb in cooling and

70 F db in heating.

5. All performance data is based upon the lower voltage of dual volt-

age rated units. See Performance Correction Tables on page 21

for operating conditions other than those listed above.

6. ARI/ASHRAE/ISO 13256-1 (WLHP application) certified condi-

tions are 86 F EWT, 80.6 F db and 66.2 F wb in cooling and 68 F

EWT, 68 F db and 59 F wb in heating.

EWT F GPM

COOLING — EAT 80

F DB/67

F WB HEATING — EAT 70

F DB PRESSURE DROP (ft wg)

TC TSC Sensible/

Total Ra ti o kW THR TC kW THA

Without

Motorized

Valve

With

Motorized

Cv = 3.5

MOPD = 20 psi

With

Motorized

Cv = 2.5

MOPD = 50 psi

3.5 19.4 12.0 0.62 0.99 22.8 Operation Not Recommended 2.6 4.9 7.1

4.5 19.6 12.1 0.62 0.96 22.9 15.3 1.40 10.5 4.2 8.0 11.7

6.0 19.8 12.2 0.62 0.92 22.9 15.6 1.43 10.7 8.3 15.1 21.6

3.5 18.9 11.7 0.62 1.09 22.6 17.0 1.46 12.0 2.6 4.9 7.1

4.5 19.0 11.8 0.62 1.05 22.6 17.4 1.50 12.3 4.2 8.0 11.7

6.0 19.2 11.9 0.62 1.03 22.7 17.7 1.53 12.5 8.3 15.1 21.6

3.5 18.3 11.4 0.63 1.19 22.3 19.1 1.56 13.8 2.6 4.9 7.1

4.5 18.4 11.5 0.62 1.16 22.4 19.6 1.59 14.1 4.2 8.0 11.7

6.0 18.6 11.6 0.62 1.13 22.5 20.0 1.63 14.4 8.3 15.1 21.6

70*

3.5 17.6 11.2 0.64 1.30 22.1 21.3 1.65 15.7 2.6 4.9 7.1

4.5 17.8 11.3 0.63 1.27 22.1 21.9 1.69 16.1 4.2 8.0 11.7

6.0 17.9 11.3 0.63 1.25 22.2 22.1 1.70 16.3 8.3 15.1 21.6

3.5 17.4 10.9 0.63 1.45 22.3 23.6 1.77 17.6 2.6 4.9 7.1

4.5 17.6 11.0 0.63 1.42 22.4 24.2 1.77 18.2 4.2 8.0 11.7

6.0 17.7 11.1 0.63 1.39 22.5 24.7 1.81 18.6 8.3 15.1 21.6

85* 4.5 17.5 10.9 0.62 1.49 22.6

Operation Not Recommended

4.2 8.0 11.7

3.5 16.3 10.6 0.65 1.52 21.5 2.6 4.9 7.1

4.5 16.5 10.7 0.65 1.50 21.6 4.2 8.0 11.7

6.0 16.6 10.7 0.65 1.47 21.6 8.3 15.1 21.6

100

3.5 15.6 10.3 0.66 1.66 21.3 2.6 4.9 7.1

4.5 15.8 10.4 0.66 1.62 21.3 4.2 8.0 11.7

6.0 15.9 10.4 0.65 1.59 21.3 8.3 15.1 21.6

110

3.5 Operation Not Recommended 2.6 4.9 7.1

4.5 15.0 10.1 0.67 1.75 21.0 4.2 8.0 11.7

6.0 15.2 10.1 0.67 1.72 21.0 8.3 15.1 21.6

DB —Dry Bulb

EWT —Entering Water Temperature (F)

GPM —Gallons per Minute

MBtuh —Btuh in Thousands

TC —Total Capacity

THA —Total Heat of Absorption (MBtuh)

THR —Total Heat of Rejection (MBtuh)

TSC —Total Sensible Cooling (MBtuh)

WB —Wet Bulb

WLHP —Water Loop Heat Pump

Performance data (cont)

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Carrier 50KQA Product information

Brand: Carrier

Model: 50KQA

Category: Heat pumps

Type: Product information

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Carrier 50KQA Product information

Carrier 50KQA Product information

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