The Signature Series is NOT designed for amateur installation. Installation SHOULD be performed by an authorized technician.
Please read this manual carefully before installation and keep it for future reference.
The Signature Series is NOT designed for amateur installation. Installation SHOULD be performed by an authorized technician.
Please read this manual carefully before installation and keep it for future reference.
Owner & Installation
Manual
MPC*1M414A & MPH*1M414A
Residential Packaged Units
Signature Series
507296-02C Page 1 of 12mrcool.com
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
Installation and servicing of air conditioning equipment
can be hazardous due to internal refrigerant pressure
and live electrical components. Only trained and
this equipment. Installation and service performed by
WARNING
other appliance. Such actions could result in property
WARNING
The installation of this appliance must conform to the requirements of the National Fire Protection Association; the
jurisdiction should be consulted before installation is made. Such applicable regulations or requirements take precedence
over the general instructions in this manual.
CAUTION
Save these instructions for future reference
INSTALLATION AND MAINTENANCE
INSTRUCTIONS
MPC*1M414A
& MPH*1M414A
Air Conditioners and Heat Pumps
C
Table of Contents
Installation ...................................................................2
Electrical Wiring...........................................................3
Duct System ................................................................4
Filters...........................................................................5
Condensate Drain........................................................5
Sequence of Operation................................................
Maintenance................................................................
Wiring Diagrams........................................................11
If this unit is to be installed in a mobile or manufactured
guidelines. All other installation guidelines must also
the unit.
WARNING
Manufactured By
MRCOOL LLC
C
*F507296-C*
Page 2 of 12 507296-02Cmrcool.com
or maintenance can cause injury or property damage.
Refer to this manual. For assistance or additional
agency.
WARNING
Installation
These instructions explain the recommended method of
installation of the packaged heat pump and air conditioner
system.
read prior to beginning installation. Note particularly any
CAUTIONS or WARNINGS in these instructions and all
labels on the units.
equipment should be determined prior to installation.
Inspection of Shipment
the unit inside the carton if the carton is damaged. File a
as claim may be denied.
are as ordered.
Limitations
and local safety codes.
also be observed.
outdoor air stream. The outdoor fan is not designed to
operate against any additional static pressure.
Location
clearance for free entrance to the air inlet and discharge
service access.
not settle or shift. Adequate structural support must be
provided. Install the unit in level position. Isolate the base
from the building structure to avoid possible transmission
of sound or vibration into the conditioned space.
The heat pump unit foundation should be raised to a
In areas that have
prevent ice accumulation. The unit should not be located
defrost condensate.
Avoid placing the unit near quiet areas, such as
sleeping quarters or study rooms. Normal operating
sound levels may be objectionable if the unit is placed near
certain rooms.
For improved start-up performance, the indoor coil
should be washed with suitable detergent to remove
any residue from manufacturing processes.
Roof Curb Installation
Instructions and be sure that all required clearances are
observed.
Rigging and Handling
CAUTION
packaging until the unit is near the place of installation.
An optional lifting lug kit may be purchased separately for
used across the top of the unit.
The lengths of the forks
of the forklift must be a minimum of 42”.
507296-02C Page 3 of 12mrcool.com
Figure 1. Rigging Unit
Figure 2. Typical Field Wiring
CAUTION
Unpacking
Carefully remove outer packaging material and discard.
corner and seal the shipping openings in the base from
prevent air leakage during unit operation.
Service Access
Access to all serviceable components is provided by four
WARNING
Clearances
All units require certain clearances for proper operation
and service. Refer to Table 1 for the minimum clearances
proper unit operation.
Do not permit overhanging structures or shrubs to
obstruct condenser air discharge outlet.
Table 1. Minimum Clearances
Clearance to
Combustibles
Clearance for
Service Access
Front of unit
24 in.
Back of unit
24 in.
Right side
24 in.
Base of unit
Top of unit 48 in.
Compressor
adjusted and ready for operation. Do not loosen
compressor mounting bolts.
Electrical Wiring
the installer. Refer to the unit rating plate for maximum
REDUCE
TO
6.00
REDUCE
TO
W1
C
L
R
O
Y1
FAN
O-OUT
LO-PS
DF
HI-PS
COMMON
Y1 OUT
2
2
24 V
Y
W2
RED
YEL
BLU
WHT
GRN
ORN
2
W1 & W2 CAN BE USED TO STAGE
ELECTRIC HEAT ACCESSORY ON
15 & 20KW MODELS
5, 7.5 & 10KW HEATER ACCESSORIES
FUNCTION OFF W1 ONLY.
WHT
DEFROST
CONTROL
P-6
P-5
G
W1
C R O
THERMOSTAT
537663-01
CONNECTION DIAGRAM, HEAT PUMP - PACKAGED
NOTE:
IF ANY OF THE ORIGINAL
WIRE IS REPLACED THE
SAME SIZE AND TYPE WIRE
MUST BE USED.
USE COPPER CONDUCTOR
ONLY, MIN 75 C WIRE
CONNECTION MUST BE JUMPERED
WHEN PRESSURE SWITCH IS NOT USED.
LINE VOLTAGE FIELD INSTALLED
WARNING-
ELECTRIC SHOCK HAZARD. UNIT
MUST BE GROUNDED IN ACCORDANCE
WITH NATIONAL AND LOCAL CODES.
Note: Because the Pressure Switches are monitored only when "Y1" (Input) is active, the code
for pressure switch open will not be seen when "Y1" is off. Instead, the "Normal Operation" or
Also, when a pressure switch opens and caused a short cycle lockout, the pressure switch-open
code will be seen until it closes, then the short cycle lockout code will flash unless it has already
REV. VALVE
DEFROST
T'STAT
Page 4 of 12 507296-02Cmrcool.com
or pigtail leads located on the main control box and are
during normal operation.
CAUTION
Units are factory wired for a 230-volt power supply.
If power supply is 208 volts, it will be necessary to
change a wire connection on the unit transformer from
240V terminal to 208V terminal as shown on the wiring
diagram.
Use only copper conductors.
Thermostat
The room thermostat should be located on an inside
installation.
changed
Single Phase
Contactor
or Circuit Breaker
Disconnect
Figure 3. 208/230 Line Voltage Wiring
Figure 4. Typical Wiring Connections
*
“O” connection used only on heat pump models
*
off W1 only.
Duct System
Duct system should be designed and sized according to the
methods in Manual Q of the Air Conditioning Contractors of
A closed return duct system shall be used. This shall not
preclude use of economizers or outdoor fresh air intake. It
is recommended that supply and return duct connections
The supply and return air duct systems should be designed
for the CFM and static requirements of the job. They
should not be sized to match the dimensions of the
duct connections on the unit.
panel. Duct to unit connections must be sealed and
507296-02C Page 5 of 12mrcool.com
1.
the unit base insulation to access bottom metal covers
underneath the insulation.
2.
3.
bottom duct connections or roof curb seals.
4.
5.
Filters
is limited.
NOTE:
Table 2. Unit Air Filter Sizes - inches
Unit Model Filter 1 Filter 2
NOTE: Install drain lines and trap so they do not block
service access to the unit.
See Figure 5 for proper drain arrangement. The drain line
must pitch to an open drain or pump to prevent clogging
material to prevent air leakage into the return air system.
CAUTION
Minimum Pitch:
Open
Trap must be deep enough to offset maximum static difference
Mounting
Frame
Figure 5. Typical Condensate Drain Connection
Crankcase Heater (if used)
to prevent excessive migration of liquid refrigerant into the
to the unit to keep this feature active.
do not open
the system disconnect switch.
Heater Kit Accessory (if used)
auxiliary heat. A heater kit accessory may also be used. To
1.
access.
Condensate Drain
for condensate line connection. Plumbing must conform
threads.
Do not
The condensate drain line must be properly trapped,
routed to a suitable drain and primed prior to unit
commissioning.
507296-02Cmrcool.com
Figure 6. Heater Kit Accessory Installation
2.
and discard.
3. Remove the heater blockoff by removing the four
4. Insert the heater into the control panel and fasten in
the same mounting holes.
5.
connections on the heater kit.
Sequence of Operation
Cooling
compressor and outdoor fan. The thermostat automatically
Heating - Heat Pump Stage
and outdoor fan. The reversing valve is not energized in
the heating mode. The thermostat again automatically
stops unit operation.
Heating - Auxiliary Electric Heat
continues to operate until all heating elements have turned
off.
Defrost System
thermostat and the defrost control.
Defrost Thermostat
The defrost thermostat is located on the outdoor coil.
thermostat contacts close and send a signal to the defrost
control board to start the defrost timing. It also terminates
507296-02C mrcool.com
Defrost Control
The defrost control board includes the combined functions
heating operation to defrost mode and back. During the
relay is energized and the defrost begins.
1.
°F in heating
NOTE: 15°F is an approximate temperature,
depending upon model and installation location.
2.
and the defrost time interval must not have expired.
3.
conditions.
Figure 7. Defrost Control Board
24V TERMINAL
STRIP
CONNECTIONS
DIAGNOSTIC
LEDS
HIGH PRESSURE
SWITCH
TEST
PINS
DEFROST TIMING
PINS (P1)
REVERSING
VALVE
DEFROST
THERMOSTAT (S6)
LOW PRESSURE
SWITCH
COMPRESSOR
DELAY PINS
S4
S87
SERVICE LIGHT
CONNECTIONS
Defrost Control Timing Pins
Each timing pin selection provides a different accumulated
compressor run time period during one thermostat run
cycle. This time period must occur before a defrost cycle
It is intended that this
product should be set at the 60-minute time interval at
initial installation. If the timing selector jumper is not in
The maximum defrost period is 14 minutes and cannot be
adjusted.
NOTE:
A test option is provided for troubleshooting. The test mode
may be started any time the unit is in the heating mode and
the defrost thermostat is closed or jumpered. If the jumper
the test pins. When the jumper is placed across the TEST
in defrost mode until the defrost thermostat opens or 14
minutes have passed. If the jumper is not removed until
again until the jumper is removed and reapplied.
Compressor Delay (Quiet Shift)
NOTE: The 30-second “off” cycle is not functional when
jumpering the TEST pins.
Time Delay
ensures the compressor is off for a minimum amount of
to protect the compressor from short cycling in case the
The delay is bypassed by placing the timer select jumper
Pressure Switch Circuit
defrost control board on heat pump models. Air conditioning
During a single demand cycle, the defrost control will
interrupted by any pressure switch wired to the control
board. In addition, the diagnostic LEDs will indicate a
of an open pressure switch (see Table 3).
Page 8 of 12 507296-02Cmrcool.com
The unit will remain locked out until power to the board
is interrupted, then re-established, or until the jumper
is applied to the TEST pins for 0.5 seconds.
NOTE: The defrost control board ignores input from the
low pressure switch terminals as follows:
• During the TEST mode
• During the defrost cycle
•
•
If the TEST pins are jumpered and the 5-minute delay
is being bypassed, the LO PS terminal signal is not
ignored during the 90-second start-up period.
Diagnostic LEDs
Defrost Board Diagnostic LEDs
Green LED
(DS2)
Red LED
(DS1)
Condition
OFF OFF
ON
Fault & Lockout Codes
OFF
OFF ON
OFF
ON OFF
Table 3. Defrost Control (CMC1) Diagnostic LEDs
System Performance
the suction superheat value to judge performance. When
checking performance of a unit that uses an expansion
system performance.
If the measured performance value varies from table value
refrigerant to nameplate charge. It is critical that the exact
system performance.
components.
Model
Suction
Superheat +/- 3°
Liquid
Subcooling +/- 2°
2 Ton 13
2.5 Ton
3 Ton 14
3.5 Ton 14
4 Ton
5 Ton
Table 4. Air Conditioner Unit Cooling System
Performance Values
Model
Suction
Superheat +/- 3°
Liquid Subcooling
+/- 2°
2 Ton 18
2.5 Ton
3 Ton
3.5 Ton 22
4 Ton 22
5 Ton 5
Table 5. Heat Pump Cooling System Performance
Values
Model Liquid Subcooling +/- 2°
2 Ton
25
2.5 Ton
15
3 Ton
28
3.5 Ton
4 Ton
35
5 Ton
28
Table 6. Heat Pump Heating System Performance
Values
507296-02C mrcool.com
Maintenance
Before performing maintenance operations on the
shock could cause personal injury or death.
WARNING
Periodic inspection and maintenance normally consists of
cleaning.
Filters
Replace disposable or clean permanent type as necessary.
Motors
Indoor and outdoor fan and vent motors are permanently
lubricated and require no maintenance.
constant torque motor. These motors remain energized and
use Tap 3 for cooling speed and Tap 5 for heating speed.
Outdoor Coil
the outdoor coil surface or other parts in the air circuit.
Cleaning should be as often as necessary to keep the coil
damaged.
Table 7. Cooling Performance - AC Models
80 DB / 67 WB Deg.
Return Air
Air Temperature Entering Outdoor Coil, Degree F
Cooling
Input
(1000 BTU)
Pressure 65° 70° 75° 80° 82° 85° 90° 95° 100° 105° 110° 115°
24
Suction
135
141 143 148 152 154
135 142 143 145 152 154 155
135 142 143 144 151 152 154 155
42
132 135 141 143 145 148
48 132 143 144 145 151 152 154
131 133 134 135 141 144 152
24
282 318 388 413 438
314 323 358 432 483
351 423
42 248 325 385 411
48 338 352 455 482
324 415 438
507296-02Cmrcool.com
Table 8. Heating Performance - HP Models
70 Deg. F Return Air Air Temperature Entering Outdoor Coil, Degree F
Cooling
Input
(1000 BTU)
Pressure 0° 5° 10° 17° 20° 25° 35° 40° 47° 50° 55° 60°
24
Suction
33 41
113 121
31 38 45 55 81 88
35 42 58 82 115
42 25 33 42 54
85 111
48 32 84 114 122
44 54 58
24 283 312 323
253 281 312 323
251 258 321 328 335
42
311 315 322 331 333 341
48
318 323 332 358 384
281 334 343 355
Table 9. Cooling Performance - HP Models
80 DB / 67 WB Deg.
Return Air
Air Temperature Entering Outdoor Coil, Degree F
Cooling
Input
(1000 BTU)
Pressure 65° 70° 75° 80° 82° 85° 90° 95° 100° 105° 110° 115°
24
Suction
134 138 141 143 145 148 151 152 154 155
133 141 143 145 151 153
138 142 143 144 145 151 152 154
42
131 134 138 141 144 148 148 148
48 132 135 138 142 143 144
151 152 154 155
133 134 135 138 142
24 255 388 414
254 314 322 383
285 322 343 443
42 238 324 348 421 445
48 248 412 438
245 312 415 438
507296-02C Page 11 of 12mrcool.com
Figure 8. Connections Diagram - A/C Constant Torque
208/230-1-60
POWER SUPPLY WITH MIN.
75
C COPPER WIRE
G
W1
C
R
YEL W/ STRIPE
CONTROL CIRCUIT
WIRING TO BE 24 VOLT,
N.E.C. CLASS 2
L1
T1
T2
L2
C
H
F
OUTDOOR
FAN
MOTOR
C12
DUAL
CAPACITOR
COMPRESSOR
C
S
R
537663-01
GRY
RED
BLK
208V
240V
24V
INDOOR
BLOWER
MOTOR
NOTE:
IF ANY OF THE ORIGINAL
WIRE IS REPLACED THE
SAME SIZE AND TYPE WIRE
MUST BE USED.
USE COPPER CONDUCTOR
ONLY, MIN 75
C WIRE
LINE VOLTAGE FIELD INSTALLED
WARNING-
ELECTRIC SHOCK HAZARD. UNIT
MUST BE GROUNDED IN ACCORDANCE
WITH NATIONAL AND LOCAL CODES.
YEL
Y
WHT
GRN
5 & 7.5KW HEATER ACCESSORIES
FUNCTION OFF W1 ONLY.
BLK
J2-1
J2-2
BLK
C
1
2
3
4
5
J2-6
J2-5
WHT
BLU
RED
YEL
WHT
B1
PUR
B4
BLACK
ORG
L
N
G
B3
S1
TRANSFORMER
TI
L
G
N
BLK
K1-1
CONTACTOR
YEL W/ STRIPE
CONTACTOR
K1-2
BLU
BLU
GRN
CONTACTOR
KI
YEL
BLK
J2-4
NOTE: TAP1 FOR FAN ONLY
TAP 2 FOR COOLING
TAP3 FOR HIGH STATIC COOLING
TAP4 AND TAP5 FOR ELECTRIC HEAT- REFER TO HEATING LABEL
BLK W/ STRIPE
YEL
THERMAL PROTECTION
SWITCH (IF USED)
YEL
YEL
HIGH PRESSURE
SWITCH
LOW PRESSURE
SWITCH (IF USED)
J1: PLUG THROUGH CONTROL PANEL (12 PIN)
J2: PLUG FOR ACCESSORY HEAT (6 PIN)
INDOOR BLOWER MOTOR
B-3
J1-3
J1-1
J1-2
J1-12
S4
S79
S173
J1-11
CONNECTION DIAGRAM
A/C (CONSTANT TORQUE BLOWER)
SINGLE PHASE
THERMOSTAT
W1 & W2 CAN BE USED TO STAGE
ELECTRIC HEAT ACCESSORY ON
10, 15 & 20KW MODELS
CRANK
CASE
HEATER
(IF USED)
BLK
BLK
HR1
Wiring Diagrams
Page 12 of 12 507296-02Cmrcool.com
208/230V-1PH,60HZ
Description
DS1 (GREEN) DS2 (RED)
No Power to Control OFF OFF
Normal Operation / Power to
Control
Simultaneous Slow Flash
Anti-Short Cycle Lockout Alternate Slow Flash
Low Pressure Switch Fault OFF Slow Flash
Low Pressure Switch Lockout OFF ON
High Pressure Switch Fault Slow Flash OFF
High Pressure Switch Lockout ON OFF
G
W1
C
R
O
THERMOSTAT
L1
T1
T2
L2
C
H
F
DUAL
CAPACITOR
COMPRESSOR
C
S
R
537661-01
CONNECTION DIAGRAM, HEAT PUMP
CONSTANT TORQUE BLOWER, SINGLE PHASE
RED
BLK
208V
240V
24V
INDOOR
BLOWER
MOTOR
NOTE:
IF ANY OF THE ORIGINAL
WIRE IS REPLACED THE
SAME SIZE AND TYPE WIRE
MUST BE USED.
USE COPPER CONDUCTOR
ONLY, MIN 75
C WIRE
LINE VOLTAGE FIELD INSTALLED
WARNING-
ELECTRIC SHOCK HAZARD. UNIT
MUST BE GROUNDED IN ACCORDANCE
WITH NATIONAL AND LOCAL CODES.
BLU
YEL
NC
C
W1
C
L
R
O
Y1
FAN
O-OUT
LO-PS
DF
HI-PS
COMMON
Y1 OUT
24 V
Y
RED
YEL
BLU
WHT
GRN
ORG
DIAGNOSTIC CODES FOR DEFROST CONTROL LEDS
Note: Because the Pressure Switches are monitored only when "Y1" (Input) is active, the code
for pressure switch open will not be seen when "Y1" is off. Instead, the "Normal Operation" or
"Anti Short Cycle" code will be seen.
Also, when a pressure switch opens and caused a short cycle lockout, the pressure switch-open
code will be seen until it closes, then the short cycle lockout code will flash unless it has already
expired.
W1 & W2 CAN BE USED TO STAGE
ELECTRIC HEAT ACCESSORY ON
10, 15 & 20KW MODELS
5 & 7.5 KW HEATER ACCESSORIES
FUNCTION OFF W1 ONLY.
BLK
DEFROST
CONTROL
WHT
DEFROST
CONTROL
J2-2
J2-4
BLK
C
1
2
3
4
5
WHT
BLU
RED
BLU
WHT
L
N
G
NOTE: TAP1 FOR FAN ONLY
TAP 2 FOR COOLING
TAP3 FOR HIGH STATIC COOLING
TAP4 AND TAP5 FOR ELECTRIC HEAT- REFER TO HEATING LABEL
TRANSFORMER
L
G
N
BLK
CONTACTOR
BLK
YEL W/STRIPE
CONTACTOR
(See instructions or markings on System Diagnostic
Module for codes of System Diagnostic Module)
BLK
BLU
WHT
FAN
YEL
YEL W/STRIPE
K1-2
K1-1
J2-1
B1
CMC1
C12
GRY
ORG
BLK
CONDENSER
FAN MOTOR
PUR
J1-2
J1-1
J1-3
B4
B3
CONTACTOR
K1
HIGH PRESSURE
SWITCH
THERMAL PROTECTION
SWITCH
(IF USED)
S173
S4
J1-11
J1-12
REV. VALVE
DEFROST
T'STAT
LOW PRESSURE
SWITCH
GRY
GRY
BLK
BLK
BRN
BRN
L1
S79
S6
J1-5
J1-6
J1-8
J1-9
J1-7
J1-10
YEL
T1
BLU
YEL
J2-6
J2-5
S1
CONTROL CIRCUIT WIRING TO
BE 24 VOLT, NEC CLASS-2
CMC1
J1: PLUG THROUGH CONTROL PANEL (12 PIN)
J2: PLUG FOR ACCESSORY HEAT (6 PIN)
INDOOR BLOWER MOTOR
GRN
FLOAT SWITCH
(IF USED)
YEL
YEL
CRANK
CASE
HEATER
(IF USED)
BLK
BLK
HR1
Figure 9. Connections Diagram - Heat Pump Constant Torque
The design and specifications of this product and/or manual are subject to change without prior notice.
Consult with the sales agency or manufacturer for details.
Signature Series
MPC*1M414A & MPH*1M414A
Residential Package
ELECTRICIAN and/or HVAC TECHNICIAN:
LICENSE #:
INSTALLATION DATE:
INSTALLATION LOCATION:
SERIAL NUMBER:
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3
-
4
-
5
-
6
-
7
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