Greenheck 483586 Microprocessor Controller DOAS v3.001 December 2018 Reference guide

Brand: Greenheck

Model: 483586 Microprocessor Controller DOAS v3.001 December 2018

Category: Split-system air conditioners

Type: Reference guide

This manual is also suitable for

Document 483586

Microprocessor Controller for

Dedicated Outdoor Air System

Microprocessor Controller for DOAS 1

Reference Guide for Microprocessor Controller

Please read and save these instructions for future reference. Read carefully before attempting to assemble, install,

operate or maintain the product described. Protect yourself and others by observing all safety information. Failure

to comply with these instructions will result in voiding of the product warranty and may result in personal injury

and/or property damage.

DOAS Technical Support

Call 1-866-478-2574

Program Features

The microprocessor controller offers control through

easy monitoring and adjustment of unit parameters by

way of a lighted graphical display and an integral push-

button keypad.

Pre-Programmed Operating Sequences

The controller has been pre-programmed to offer

multiple control sequences to provide tempered air.

Factory default settings allow for easy setup and

commissioning. The sequence parameters are fully

adjustable. Refer to the Sequence of Operation for

details.

BMS Communication

The user can remotely adjust setpoints, view unit status

points and alarms. The microprocessor controller is

capable of communicating over several protocols:

• BACnet® MSTP • Modbus RTU

• BACnet® IP • Modbus TCP

• LonWorks®

Reference Points List for a complete list of BMS points.

Internal Time Clock (Schedule)

The controller has an internal programmable time clock,

allowing the user to set occupancy schedules for each

day of the week. The controller option also has morning

warm-up and cool down capability for improved

comfort at the time of occupancy.

Alarm Management

The microprocessor controller will monitor the unit’s

status for alarm conditions. Upon detecting an alarm,

the controller will record the alarm description, time,

Introduction

date, and input/output status points for user review. A

digital output is reserved for remote alarm indication.

Alarms are also communicated via BMS (if equipped).

Occupancy Modes

The microprocessor controller offers three modes of

determining occupancy: a digital input, the internal time

clock or the BMS. If in the unoccupied mode, the unit

will either be shut down, continue normal operation

utilizing adjustable unoccupied setpoints, recirculate

with unoccupied setpoints or will cycle on to maintain

adjustable unoccupied room temperature and humidity

setpoints (room temperature and humidity sensor is

optional).

Remote Display Panel (if equipped)

A touch pad display panel allows for remote monitoring

and adjustment of parameters, allowing ease of control

access without going outdoors.

WARNING

Electrical shock hazard. Can cause personal injury or

equipment damage. Service must be performed only

by personnel that are knowledgeable in the operation

of the equipment being controlled.

WARNING

Mechanical high static protection cutoffs must

be installed by others to protect the system and

equipment from over-pressurization when using

factory provided control sensors. The manufacturer

does not assume responsibility for this.

DOAS v3.001

Microprocessor Controller for DOAS2

Sequence of Operation

General Operation . . . . . . . . . . . . . . . . 3-4

Setpoint Control (Occupied) . . . . . . . . . . . . 4

Setpoint Control (Unoccupied). . . . . . . . . . . 4

Heating . . . . . . . . . . . . . . . . . . . . . . . 4

Cooling . . . . . . . . . . . . . . . . . . . . . . . 4

Economizer. . . . . . . . . . . . . . . . . . . . . 5

Dehumidification . . . . . . . . . . . . . . . . . . 5

Reheat . . . . . . . . . . . . . . . . . . . . . . . 5

Supply Fan VFD Sequence. . . . . . . . . . . . . 5

Exhaust Fan VFD Sequence . . . . . . . . . . . . 5

OA and Recirc Air Damper Control. . . . . . . . . 6

Energy Recovery Wheel . . . . . . . . . . . . . . 6

Alarms . . . . . . . . . . . . . . . . . . . . . . . 7

Controller Overviews

Large Controller . . . . . . . . . . . . . . . . . . 8

Medium Controller . . . . . . . . . . . . . . . . . 9

c.pCOe - Expansion Board Overview, Medium . . 10

pCOe - 4:1 Furnace. . . . . . . . . . . . . . . . .11

pCOe - High Turndown Furnace . . . . . . . . . . 11

Display Use . . . . . . . . . . . . . . . . . . . . . 12

Example of Parameter Adjustment . . . . . . . .12

Example of Web User Interface . . . . . . . . . .13

Main Menu . . . . . . . . . . . . . . . . . . . . . 14

Unit Status Overview. . . . . . . . . . . . . . 15-17

Unit Enable . . . . . . . . . . . . . . . . . . . . . 18

Menus

Control Variables

Temp Control . . . . . . . . . . . . . . . . 18-20

Dehumidification . . . . . . . . . . . . . . 20-21

Refrigeration. . . . . . . . . . . . . . . . . . .22

Damper Control . . . . . . . . . . . . . . . 22-23

Energy Recovery . . . . . . . . . . . . . . . . 24

Fan Control

Supply Fans Control . . . . . . . . . . . . . 25

Exhaust Fans Control. . . . . . . . . . . . .26

Occupancy . . . . . . . . . . . . . . . . . . . 27

Advanced

Manual Overrides. . . . . . . . . . . . .28-30

Network Settings . . . . . . . . . . . . . 30-31

Backup/Restore . . . . . . . . . . . . . 32-33

I/O Configuration . . . . . . . . . . . . . . .34

Unit Configuration . . . . . . . . . . . . . .34

Alarms . . . . . . . . . . . . . . . . . . . . . .35

Table of Contents

IG Furnace Alarm Descriptions . . . . . . . . . .35

Appendix

Remote Display . . . . . . . . . . . . . . . . . . 36

Carel

NTC Temp Sensor Chart . . . . . . . .36

I/O Expansion Board Quick Start . . . . . . . . . 37

Room Thermostat Quick Start. . . . . . . . .38-39

GreenTrol

Airflow Monitoring Quick Start . . . . 40

Points List . . . . . . . . . . . . . . . . . . . 41-52

Modbus Connections . . . . . . . . . . . . . . .53

Maintenance Log . . . . . . . . . . . . . . . .53-54

Our Commitment . . . . . . . . . . . . . Backcover

Microprocessor Controller for DOAS 3

Sequence of Operation

The microprocessor controller can be configured for

air handler, energy recovery, and dedicated outdoor air

systems. Each application utilizes similar technologies

for heating and cooling: chilled water, hot water, indirect

gas, electric heat, packaged DX cooling, and packaged

DX cooling with digital and inverter scrolls. All setpoints,

lockouts and delays are user adjustable via the integral

keypad display, remote display, or web user interface.

General Operation

UNIT START COMMAND: The microprocessor

controller requires a digital input to enable operation.

The unit can then be commanded on or off by this

digital input, keypad, the BMS or internal time clock.

When a start command becomes active the following

steps occur:

• Energy recovery wheel starts, if equipped

• Factory mounted and wired dampers are powered

(Outdoor air, exhaust air, and recirculation air

dampers, if equipped)

• Exhaust fan, if equipped, starts after adjustable delay

• Supply fan starts after adjustable delay

• Tempering operation starts after adjustable delay

UNIT STOP COMMAND: A shutdown occurs when

there is not an occupied or unoccupied start command.

The following shutdown methods can occur.

Hard shutdown occurs under the following conditions:

• A user or the BMS disables the system, and the

supply temperature is less than the soft shutdown

enable setpoint.

• Occupancy is commanded to unoccupied while there

is no unoccupied start command, and the supply

temperature is less than the soft shutdown enable

setpoint.

When a hard shutdown occurs:

• The unit shuts down immediately.

• Dampers spring-return to their off position.

Soft shutdown occurs under the following conditions:

• A user or the BMS disables the system, and the

supply temperature is greater than or equal to the

soft shutdown enable setpoint.

• There is no unoccupied or occupied start command

and the supply temperature is greater than or equal

to the soft shutdown enable setpoint.

The following occurs during a soft shutdown:

• Tempering outputs immediately revert back to their

off value; while

• Dampers remain open and fans continue to run; until

– The supply air temperature falls below the soft

shutdown enable setpoint minus 5.0°F; or

– The soft shutdown delay timer has expired.

UNIT/SYSTEM DISABLED COMMAND:

The unit becomes disabled due to the following:

• The unit was disabled from the controller’s Unit

Enable screen.

• The unit was disabled from the BMS.

• The shutdown input is in the shutdown position.

• A shutdown alarm was activated.

When disabled the following actions occur:

• The unit shuts down immediately; and

• Dampers spring-return to their off position.

OCCUPIED/UNOCCUPIED MODES: The

microprocessor controller offers three modes of

determining occupancy: digital input, the internal time

clock or the BMS. When in the unoccupied mode, the

unit can be configured to shut down, or cycle on to

maintain the unoccupied room setpoints. The unit can

be temporarily overridden to the occupied mode via

a digital input, keypad display, or room thermostat, if

equipped.

The controller can be configured with morning warm-

up and cool down to bring the space to the occupied

setpoint prior to occupancy.

• Occupied Mode:

- Exhaust fan on, if equipped

- Supply fan on

- Heating (refer to Heating section)

- Cooling (refer to Cooling section)

- Energy Recovery Wheel Control (refer to

Energy Recovery Wheel section), if equipped

- Damper Control (refer to Outdoor Air and

Recirculated Air section), if equipped

• Unoccupied Mode (Unit Off): Unit remains off when

in unoccupied mode.

• Normal Operation with Unoccupied Setpoints:

Optional unoccupied mode will operate as if in

occupied mode but will utilize adjustable unoccupied

setpoints.

- Exhaust fan on, if equipped

- Supply fan on

- Heating (refer to Heating section)

- Cooling (refer to Cooling section)

- Energy Recovery Wheel Control (refer to Energy

Recovery Wheel section), if equipped

- Damper Control (refer to Outdoor Air and

Recirculated Air section), if equipped

• Recirculation with Unoccupied Setpoints: Optional

unoccupied mode when there is an unoccupied

recirculation damper. The unit will continue to run,

but in full recirculation.

- Supply fan on

- Recirculation air damper open

- OA damper closed

- Tempering operations begin

Microprocessor Controller for DOAS4

Sequence of Operation

• Unoccupied Mode (Cycle on Room): Optional

unoccupied mode when there is an unoccupied

recirculation damper and room temperature and/

or humidity sensor(s) connected to the controller.

The unit will cycle on to maintain unoccupied room

setpoints if there is a call for unoccupied heating,

cooling or dehumidification.

- Exhaust fan off, if equipped

- Supply fan on

- Recirculation air damper open

- OA damper closed

- Tempering operations begin

Setpoint Control (Occupied)

Supply air temperature setpoint can be configured

as constant, or can be reset by either outside air

temperature, or room temperature setpoint. If equipped

with BMS communications, the user can also directly

command the supply temperature setpoint, or room

temperature setpoint, if equipped.

• Outdoor Air Temperature Reset Function: The

controller will default to supply temperature reset

based on outdoor air temperature. The controller will

monitor the OA temperature and reset the supply

temperature setpoint based upon the outdoor air

reset function.

• Room Temperature Reset (optional): With a

room temperature sensor, the controller will adjust

the supply air temperature setpoint between

the minimum (55°F) and maximum (90°F), to

satisfy the desired room temperature. Room

temperature setpoint can be adjusted locally at

the microprocessor by BMS or room thermostat, if

equipped.

Setpoint Control (Unoccupied)

When equipped with an unoccupied recirculation

damper and optional room temperature and/or

humidity sensors, the unit will cycle on to maintain the

unoccupied room setpoints.

• Unoccupied Heating: If equipped with heating,

the unit is enabled when the room temperature is

less than the unoccupied heating setpoint minus

differential (60°F). The supply air temperature setpoint

will be set to the supply maximum reset limit (90°F).

The unit cycles off when the room temperature

reaches the unoccupied heating setpoint.

• Unoccupied Cooling: If equipped with cooling, the

unit is enabled when the room temperature is greater

than the unoccupied cooling setpoint plus differential

(80°F+5°F). The supply air temperature setpoint will

be set to the supply minimum reset limit (55°F). The

unit cycles off when the room temperature reaches

the unoccupied cooling setpoint.

• Unoccupied Dehumidification: If equipped with

cooling, the unit is enabled when the room relative

humidity exceeds the unoccupied room relative

humidity setpoint plus differential (50%+5%). The

supply air temperature setpoint will be set to the

equivalent occupied supply setpoint.

• Morning Warm-Up/Cool Down: The unit uses

adjustable preset time to temper the space to

occupied setpoint prior to occupancy (room

temperature sensor is optional).

Heating

The heating is controlled to maintain the supply

temperature setpoint. The heating will be locked out

when the outside air temperature is above the heating

lockout (80°F adj).

• Indirect Gas Furnace: Microprocessor controller

will modulate the indirect gas furnace to maintain the

supply temperature setpoint.

• Hot Water Coil: Microprocessor controller will

modulate a hot water valve (provided by others) to

maintain the supply temperature setpoint. Coil freeze

protection must be provided by others in the field!

• Electric Heater: Microprocessor controller will

modulate an electric heater to maintain the supply

temperature setpoint.

Cooling

The cooling is controlled to maintain the supply

temperature setpoint. The mechanical cooling will be

locked out when the outside air temperature is below

the cooling lockout (55°F).

• Chilled Water: Microprocessor controller will

modulate a chilled water valve (provided by others) to

maintain supply air setpoint. Coil freeze protection

must be provided by others in the field!

• Packaged/Split DX Cooling (Standard Scroll):

Microprocessor controller will enable stages of

cooling to maintain the supply air setpoint.

• Packaged DX Cooling (Digital Scroll):

Microprocessor controller will modulate the digital

scroll to maintain the supply air temperature setpoint.

• Packaged DX Cooling (Inverter Scroll):

Microprocessor controller will modulate the inverter

scroll to maintain the supply air temperature setpoint.

Microprocessor Controller for DOAS 5

Economizer

If the application requires cooling, and the outdoor

air conditions are suitable for free cooling, the

controller may enter the economizer state. If the unit is

economizing and the discharge temperature setpoint is

not being met, the controller may bring on mechanical

cooling. If equipped with a modulating outdoor air and

recirculated air damper, the dampers will modulate

between the minimum OA and maximum positions to

maintain the supply temperature setpoint. If equipped

with an energy wheel, Reference Energy Recovery

Wheel Sequence.

• Temperature: The economizer will be locked out

when:

- The outside air is greater than the economizer

high lockout (65°F).

- The unit is operating in dehumidification mode.

- There is a call for heating.

• Temperature/Enthalpy: The economizer will be

locked out when:

- The outside air is greater than the economizer

high lockout (65°F dry-bulb).

- The outside air is greater than the economizer

high enthalpy lockout (23 btu/lb).

- The unit is operating in dehumidification mode.

- There is a call for heating.

Dehumidification

The cooling is controlled to maintain the cold coil

setpoint. The dehumidification sequence will be locked

out when the OA is less than the dehumidification

lockout (10°F) above the cold coil setpoint. If equipped

with BMS communications, the user can also directly

set the cold coil leaving air setpoint.

• Optional Room Relative Humidity Sensor or

Thermostat: The controller will adjust the cold

coil leaving air temperature setpoint between the

minimum (50°F) and maximum (55°F) setpoint to

satisfy the desired room relative humidity setpoint.

Reheat

While the unit is in dehumidification mode, the supply

air can be reheated via Primary Heating Source, On/Off

Hot Gas Reheat or Modulating Hot Gas Reheat.

• Modulating Hot Gas Reheat (valve): The

microprocessor controller will modulate the hot gas

reheat valve to maintain the supply temperature

setpoint.

• Reheat Plus: The primary heat source configured to

act as secondary reheat.

Supply Fan VFD Sequence

The factory installed VFD is wired to the controller.

Supply fan speed needs to be set during test

and balance of the unit. If equipped with BMS

communications, the user can also directly command

the supply fan speed.

• Optional Space/Duct CO

Sensor: The controller

will modulate the supply fan based upon a

comparison of the CO

setpoint to the actual CO

levels reported from the sensor.

• Optional Duct Static Pressure Sensor: The

controller will modulate the supply fan based upon

a comparison of the duct static pressure setpoint to

the actual duct static pressure level reported from the

sensor.

• Optional Building Static Pressure Sensor: The

controller will modulate the supply fan based upon a

comparison of the building static pressure setpoint to

the actual building static pressure level reported from

the sensor.

• Optional Single Zone VAV (SZ): The controller will

control the supply air temperature and supply fan

speed to maintain the room temperature setpoint.

This sequence requires a room temperature sensor.

Heating - When the room requires heating,

the controller will reset the supply air temperature

setpoint up to the maximum (90°F) while increasing

the supply fan speed up to its maximum heating

speed.

Cooling - When the room requires cooling, the

controller will first reset the supply air temperature

setpoint down to the minimum (55°F) while the

supply fan remains at the minimum cooling speed.

After a time delay, the supply fan speed will increase

up to its maximum cooling speed to maintain the

room temperature setpoint.

Exhaust Fan VFD Sequence

The factory installed VFD is wired to the controller.

Exhaust fan speed needs to be set during test

and balance of the unit. If equipped with BMS

communications, the user can also directly command

the exhaust fan speed.

• Optional Building Static Pressure Sensor: The

controller will modulate the exhaust fan based upon a

comparison of the building static pressure setpoint to

the actual building static pressure level reported from

the sensor.

• Optional Supply Fan Tracking: The controller will

proportionally modulate the exhaust fan based upon

the supply fan speed.

• Optional Outdoor Air Damper Tracking: The

controller will proportionally modulate the exhaust fan

based upon the outdoor air damper position.

Sequence of Operation

Microprocessor Controller for DOAS6

Outdoor Air and Recirculated (Recirc) Air

Damper Control

If equipped with a modulating outdoor air and

recirculated air damper, the recirculated air damper will

operate inverse of the outdoor air damper. The outdoor

air damper will open to a Minimum Outdoor Air Position

(Min OA) when in occupied mode. If the controller

is configured to modulate the supply fan speed, the

minimum and maximum OA positions can be reset

based on supply fan speed. If equipped with BMS

communications, the user can also directly reset the

damper position up to the maximum OA position.

• Optional Space CO

Sensor: The controller will

proportionally modulate the OA/RA dampers based

upon a comparison of the CO

setpoint to the actual

level reported from the sensor. As the CO

level

rises, the controller will proportionally modulate the

outdoor air damper open, between the minimum OA

damper position and maximum CO

position.

• Optional Building Pressure: The OA/RA dampers

will modulate based upon the signal from a building

static pressure sensor. The controller will modulate

the dampers, between the minimum and maximum

OA positions, based upon a comparison of the

building static pressure setpoint to the actual building

static pressure level reported from the sensor.

Energy Recovery Wheel Sequences

Economizer (optional): If the unit is equipped with an

energy recovery wheel, the economizer will modulate/

stop the energy wheel to achieve free cooling. Jog

wheel control is available during stop wheel economizer

operation. This sequence allows the wheel to rotate for

a short period of time exposing a new section to the air

stream.

• Stop Wheel: When economizer mode is enabled

and there is a signal for cooling, the wheel will stop

rotating to allow free cooling.

• Modulate Wheel: When economizer mode is

enabled and there is a signal for cooling, the

controller modulates wheel speed to maintain the

supply temperature setpoint.

• Energy Wheel Bypass Dampers, if equipped:

During normal operation, the dampers shall remain

closed to allow full operation of the energy wheel.

During economizer sequences, the dampers will be

open to bypass the energy wheel.

Frost Control (optional): The microprocessor

controller will activate the frost control method when

the outdoor air temperature is less than the defrost

setpoint (5°F) and the wheel pressure switch is closed

due to a high wheel pressure drop. Once the pressure

drop decreases below the pressure switch point or the

outdoor air temperature increases, the unit will resume

normal operation.

• Electric Preheater: When frosting is occurring, the

preheater is energized to defrost the wheel.

• Modulate Wheel: When frosting is occurring, the

wheel slows to allow defrosting to occur.

• Cycle Wheel: When frosting is occurring, the

energy wheel is cycled off for a defrost cycle time

(5 minutes). After the defrost cycle time, the wheel

is re-energized to continue normal operation. The

controller will not allow another defrost cycle for a

minimum normal operating cycle time (30 minutes).

• Timed Exhaust: When frosting is occurring, the

supply fan is cycled off along with the tempering for

a defrost cycle time (5 minutes). The exhaust fan

will continue to run allowing the warm exhaust air

to defrost the wheel. After the defrost cycle time,

the supply fan and tempering are re-energized to

continue normal operation. The controller will not

allow another defrost cycle for a minimum normal

operating cycle time (30 minutes).

Sequence of Operation

Microprocessor Controller for DOAS 7

Alarms

The microprocessor controller includes a digital output

for remote indication of an alarm condition, which

connects via the J15 port. Possible alarms include:

• Dirty Filter Alarm: If the outside air or return air

filter differential pressure rises above the differential

pressure switch setpoint, the microprocessor

controller will activate an alarm.

• Supply and Exhaust Air Proving Alarm:

Microprocessor controller monitors proving switch on

each blower and displays an alarm in case of blower

failure.

• Sensor Alarm: Microprocessor controller will send

an alarm if a failed sensor is detected (temperature,

pressure, relative humidity).

• Supply Air Low Limit: If the supply air temperature

drops below the supply air low limit (35°F), the

microprocessor controller will de-energize the unit

and activate the alarm output after a preset time

delay (300s).

• Other Alarms: Wheel Rotation, High Wheel

Pressure, High/Low Refrigerant Pressure.

Sequence of Operation

Microprocessor Controller for DOAS8

NO1

NO2

NO3

NO4

NO5

NO6

NO7

NO8

NC8

NO12

C12

NC12

NO13

C13

NC13

NO9

NO10

NO11

GND

+VDC

+V term

GND

+5 V

REF

GND

VG0

ID1

ID2

ID3

ID4

ID5

ID6

ID7

ID8

IDC1

GND

ID9

ID10

ID11

ID12

IDC9

ID13H

ID13

IDC13

ID14

ID14H

J24 J2 J3

J4 J5 J7

J20

J21

J14

J10

J13

J12

J22

J16

J17

J18

J15

J19

NO14

C14

NC14

NO15

C15

NC15

C16

NO16

NO17

NO18

C16

ID15H

ID15

IDC15

ID16

ID16H

ID17

ID18

IDC17

GND

U10

GND

drac SMBdrac suBdleiF

J23 FBus2

J11 pLAN

J25

BMS2

J26

FBus2

4321

Wheel Pressure Limit

Supply Fan Proving

Unit On/Off Input

Wheel Rotation Alarm

Occupied/Unoccupied Input

Exhaust Fan Proving

Dirty Filter Input

Supply Fan VFD Output

Room Temperature Sensor

Exhaust Fan VFD Output

Outdoor Air Damper Analog Output

Cooling/VSC Cond Fan Analog Output

Heating Analog Output

Hot Gas Reheat Analog Output

24VAC for Analog Outputs

Outdoor Relative Humidity Sensor

Duct Pressure Sensor

Building Pressure Sensor

Room RH

After Cold Coil Temperature Sensor

CO2 Sensor

Sensor B1, B2, B3 Commons

Supply Discharge Temperature Sensor

Outdoor Air Temperature Sensor

24VAC to Controller

Wheel Frost Mode

24 VAC When Unit On

Exhaust Fan Enable

Supply Fan Enable

Heating Enable

24 VAC from Supply Fan Proving

Staged Compressor 2

Staged Compressor 1

Economizer Mode/Output to Dampers

24 VAC

Alarm Dry Contact

Staged Compressor 3

Compressor Limit Circuit A

Compressor Limit Circuit B

Compressor Limit Circuit C

Compressor Limit Circuit D

Discharge Pressure Circuit B (VSC)

2 Speed Fan Input

2 Position Damper Input

Staged Compressor 4

Energy Recovery Wheel Enable

Inverter Compressor E-Stop (VSC)

Compressor Fan 1 Enable (VSC)

Compressor Fan 2 Enable (VSC)

Optional BACnet IP, Modbus TCP, Web UI, Ethernet Connections

Large Controller Overview

Remote Display

• Six conductor RJ25 cable

• Connects to J10

Optional LonWorks cards are

located in BMS Card port.

Optional Modbus RTU/BACnet MSTP connections

are made to the J26 FBus2 terminal.

Microprocessor Controller for DOAS 9

Medium Controller Overview

NO1

NO2

NO3

NO4

NO5

NO6

NO7

NO8

NC8

NO12

C12

NC12

NO13

C13

NC13

NO9

NO10

NO11

GND

+VDC

+V term

GND

+5 V

REF

GND

VG0

ID1

ID2

ID3

ID4

ID5

ID6

ID7

ID8

IDC1

GND

ID9

ID10

ID11

ID12

IDC9

ID13H

ID13

IDC13

ID14

ID14H

J24 J2 J3

J4 J5 J7

J20

J21

J14

J10

J13

J12

J22

J16

J17

J18

J15

J19

NO14

C14

NC14

NO15

C15

NC15

C16

NO16

NO17

NO18

C16

ID15H

ID15

IDC15

ID16

ID16H

ID17

ID18

IDC17

GND

U10

GND

drac SMBdrac suBdleiF

J23 FBus2

J11 pLAN

J25

BMS2

J26

FBus2

4321

High Pressure Switch Circuit A

Supply Fan Proving

Occupied/Unoccupied Input

Low Pressure Switch Circuit A

Unit On/Off Input

OA/RA Damper End Switch

Cooling Analog Output

Hot Gas Reheat Analog Output

Condenser Fan Circuit A or Heating Analog Output

24VAC for Analog Outputs

Outdoor Relative Humidity Sensor

Supply Fan VFD Output

Outdoor Air Damper Output

Refrigerant Pressure Circuit A

Supply Discharge Air Temperature

Sensor B1, B2, B3 Commons

After Cold Coil Temperature Sensor

Outdoor Air Temperature Sensor

24VAC to Controller

Stagged Compressor 1

24 VAC When Unit On

Stagged Compressor 3

Stagged Compressor 2

Stagged Compressor 4

24 VAC from Supply Fan Proving

Economizer Mode/Output to Dampers

24 VAC

Alarm Dry Contact

Condenser Fan VFD Start

Exhaust Fan Proving

Dirty Filter Input

Wheel Rotation Alarm

Freeze Stat Input

Condenser Fan Stage 2 Start

Condenser Fan Stage 3 Start

Inverter Compressor E-Stop (VSC)

Refrigerant Pressure Circuit B

Condenser Fan Circuit B or Heating Analog Output

High Pressure Switch Circuit B

Low Pressure Switch Circuit B

Condensate Drain Pan Switch

Remote Start Input

Optional BACnet IP, Modbus TCP, Web UI, Ethernet Connections

Remote Display

• Six conductor RJ25 cable

• Connects to J10

Optional LonWorks cards are

located in BMS Card port.

Optional Modbus RTU/BACnet MSTP connections

are made to the J26 FBus2 terminal.

Microprocessor Controller for DOAS10

c.pCOe - Expansion Board Overview, Medium Controller Arrangement

19.2 K

9.6 K

38.4 K

57.6 K

CAREL

Modbus

OFF

Address Ext. ProtBaud

Address Ext Baud Prot

24 VAC Power

Heating Output

Exhaust Fan VFD Output

Energy Recovery Output

Space Temperature

Mixed Air Temperature

Exhaust Air Temperature

Space Static Pressure

Supply Air Duct Static Pressure

Space Setpoint Adjustment

Wheel Enable

Furnace Heating Stage 1

Furnace Heating Stage 2

Preheater Enable

The expansion board is an I/O module than can be used to monitor additional statuses or provide commands from

medium board controller.

Microprocessor Controller for DOAS 11

pCOe - 4:1 Furnace Overview

High Speed Pressure Switch

Main Gas Valve

Ignition Controller Alarm

Low Speed Pressure Switch

24 VAC for Analog Outputs

Modulating Gas Valve

Modbus Connection

24 VAC to Controller

Modbus Address Switches

24 VAC

High Speed Fan

24 VAC

Ignition Controller

pCOe - High Turndown Furnace

Low Speed Pressure Switch

Main Gas Valve - Small Manifold

Main Gas Valve - Large Manifold

Ignition Controller Alarm

24 VAC for Analog Outputs

Modulating Gas Valve

Modbus Connection

24 VAC to Controller

Modbus Address Switches

24 VAC

High Speed Fan

24 VAC

Ignition Controller - Small Manifold

24 VAC

Ignition Controller - Large Manifold

High Speed Pressure Switch

Microprocessor Controller for DOAS12

The microprocessor controller is located in the unit control center. The face of the controller has six buttons,

allowing the user to view unit conditions and alter parameters. The microprocessor controller is pre-programmed

with easy to use menus. A remote display is also available, which connects via the J10 port. A six wire patch cable

is needed.

Display Use

Keypad Description

Button Description Functions

Main Menu Press to go directly to the Main Menu from any screen.

From the Main Menu, navigate to the following screens:

• Unit Enable

• Unit Status

• Ctrl Variables

• Alarm Menu

Alarm The Alarm button ﬂashes when there is an active alarm.

Press to view active alarms.

Press twice to go to the alarms reset screen.

Escape Press from the Main Menu to view the Unit Status screen.

Press to go back one menu level.

Press when editing a variable to cancel editing.

Up Press to navigate through the menus/screens.

Press after entering a variable to increase a current value.

Enter Press to enter a highlighted menu or screen item.

Press to enter a writable variable and press again to conﬁrm the new variable value.

Down Press to navigate menus/screens.

Press after entering a variable to decrease the current value.

Virtual keypad/display on web interface only.

These two buttons on the virtual keypad/display are used to simulate two-button actions on the handheld

keypad/display.

To simulate pressing two buttons simultaneously:

1. Click on 2-Button Click.

2. Then, sequentially click on two keypad buttons (Main, Alarm, Escape, Up, Enter, Down).

To simulate pressing and holding two buttons simultaneously:

1. Click on 2-Button Hold.

2. Then, sequentially click on two keypad buttons (Main, Alarm, Escape, Up, Enter, Down).

Example of Parameter Adjustment

Supply air low limit

Alarm when supply is

below: 32.0º F

Alarm delay: 300s

Once the cursor has reached the desired parameter, press the

buttons to

adjust the value.

The cursor always begins in the upper left corner of the display and will be

blinking. Press the

button to move the cursor down for parameter adjustment.

Supply air low limit

Alarm when supply is

below: 35.0º F

Alarm delay: 300s

When satisfied with the adjustment, press the button to save the parameter.

When finished, make certain the cursor is in the upper left corner. If the cursor is

not in the upper left corner, the changes will not be saved. The cursor must be in

the upper left corner to enable screen advancement.

Supply air low limit

Alarm when supply is

below: 32.0º F

Alarm delay: 300s

Microprocessor Controller for DOAS 13

Web User Interface

The Web User Interface allows access to the unit controller through the building network. Reference Cntrl Variables/

Advanced/Network Settings to set the IP network protocol. Once proper communication is established, the user

can click on the follow tabs:

Overview – Includes a functioning unit graphic, monitoring points, and active setpoint adjustment.

Alarm – Shows current and cleared alarms.

Unit Display – Mimics the unit controller display. Allows the user full access to the controller without physically

being at the unit.

Trending – User can view past and present controller points.

Information – Provides manufacturer support information as well as IOM resources.

Service – User must be logged with service access criteria (9998). Once proper login is established, the user can

view configured input/output points associated with the unit controller

Microprocessor Controller for DOAS14

Main Menu Navigation

Unit Enable

Main Status Ctrl Variables Alarm Menu

Unit Status

Temp Control

Active Alarms

Input Output Status

Dehumidiﬁcation

Reset Alarms

Note:

Additional status screens

are displayed depending

on unit conﬁguration.

Screens may include, but

are not limited to:

Occupancy

Damper positions

Fan status

Airﬂow

Setpoints

Economizer

Energy recovery

Cooling

Circuit pressure

Heating

Dehumidiﬁcation

Static pressure

Refrigeration Compressor Control

Alarm History

Pressure Control

Clear History

Damper Control

Export History

Energy Recovery

Fan Control Supply Fan Control

Exhaust Fan Control

Occupancy

Advanced

Note:

The Advanced

menu is read-

only. The service

password is

required to change

these settings.

Reference the

Advanced menu

section for more

information.

*Consult

factory for more

information.

Manual Overrides

Adv. Setpoints*

Network Settings

Backup/Restore

IO Status/Offset*

IO Conﬁg

Unit Conﬁg

Unit Settings*

Service Info*

Alarm

Management

Shutdown

Alarms

General

Alarms

Microprocessor Controller for DOAS 15

The microprocessor controller will revert to a default main menu loop. This loop includes several screens to view the

operating conditions of the unit. Scroll through the menu screens by using the

buttons.

Unit Status Overview

Unit Status Screen Symbols

Symbol Indicates

Supply air fan status.

Rotation indicates airflow; static blades indicate no airflow.

Cooling

Heating

Dehumidifying

Economizing

Defrost

THE INITIAL MENU SCREEN DISPLAYS THE JOB NAME, UNIT TAG, UNIT STATUS, OUTSIDE

AIR CONDITIONS, SPACE CONDITIONS AND SETPOINTS.

Possible modes include:

• Off/Standby

• Unoccupied Start

• Dampers Open

• Fan Start Delay

• Fans Starting

• Startup Delay

• System On

• Soft Shutdown

• System Disabled

• Remote Off

• Shutdown Alarm

• Fans Only

• Economizing

• Cooling

• Dehumidifying

• Heating

• HGRH Purging

• Defrost Active

• Overrides Active

• Expansion Offline

INPUT OUTPUT STATUS

Displays real time conditions from sensors located in the unit and building space

if equipped with space mounted sensors. Controller output conditions can also

be viewed from this screen. To view the desired input/output point, the user must

select the desired channel. Reference the Controller Overview section in this IOM

for individual point locations.

OCCUPANCY STATUS

Displays current status of occupancy and the configured occupancy control

method and time zone.

DAMPER COMMANDED POS

This screen appears if equipped with modulating outdoor air and recirculated air

dampers. Displays current position of the outdoor air damper. Recirculating air

damper position is the inverse of outside damper position.

SUPPLY FAN STATUS

This screen displays the fan enable command, fan proving status, and the supply

fan ramp being sent from the controller to the VFD. The minimum and maximum

speeds are set in the VFD (Reference unit Installation and Operation Manual for

VFD programming). The controller can modulate the fan between the min and

max speeds via an analog output.

Microprocessor Controller for DOAS16

EXHAUST FAN STATUS

This screen displays the fan enable command, fan proving status, and the

exhaust fan ramp being sent from the controller to the VFD. The minimum and

maximum speeds are set in the VFD (Reference unit Installation and Operation

Manual for VFD programming). The controller can modulate the fan between the

min and max speeds via an analog output.

AIRFLOW STATUS

This screen displays the current status of airflow volumes if the unit is provided

with airflow monitoring.

AMBIENT LOCKOUT STATUS

Displays heating and cooling lockout status based on the outside air ambient

temperature. Ambient lockouts for heating and cooling can be altered by entering

Main Menu/Ctrl Variables/Temp Control/Cooling or Heating.

OUTSIDE RESET

This screen will be active if the controller is configured for outside air reset. The

heating and cooling devices modulate to maintain the supply air temperature

setpoint as determined by the outside reset calculation.

SUPPLY SETPOINT

Displays current supply temperature and supply temperature setpoint to be

achieved.

ECONOMIZER RAMP

The economizer ramp screen will be active if the unit is configured for an

economizer control method. This screen displays the economizer setpoint, supply

air discharge temperature, economizer ramp status, and economizer control

mode of control. Economizer control mode options include, outside dry bulb,

outside enthalpy, comparative dry bulb, and comparative enthalpy.

RAMP OUTPUT

The CO

Ramp Output screen will be active if the unit is configured for CO

control. This screen displays the CO

setpoint, CO

level from the space, and the

status of the control ramp.

ENERGY RECOVERY WHEEL STATUS

This screen provides overall status of the energy recovery wheel.

ACTIVE RESET

This screen will be active if temperature control mode is set for space or return air

reset. The supply temperature setpoint is calculated based on the active setpoint

and the current space or return temperature. The calculated setpoint is scaled

between the supply temperature minimum and maximum setpoints determined by

the current mode of operation.

Unit Status Overview

Microprocessor Controller for DOAS 17

COOLING RAMP

This screen displays the active setpoint, supply discharge temperature, cooling

enable/disable, cooling ramp being sent from the controller, and the overall

capacity being demanded.

COMPRESSOR REQUEST

The compressor request screen will be active if the unit is equipped with DX

cooling. Screen displays overall status of individual compressor operation being

sent from the unit controller. Example: Circuit A compressor enable (On) with

modulating value of 26%.

HEATING RAMP

This screen displays the active setpoint, supply air temperature, heating enable/

disable, and heating ramp being sent from the controller.

DEHUMIDIFICATION

This screen will display the overall dehumidification status and selected mode of

dehumidification control.

The following dehumidification modes are available when the space is in occupied

mode:

• Cold coil setpoint plus offset (10ºF)

• Inside RH*

• Inside dew point*

• Outside dew point

• Inside RH or inside dew point*

• Inside RH or inside dew point or outside dew point

• Inside RH and inside dew point*

• Inside RH and inside dew point or outside dew point

*Available during unoccupied mode.

HGRH RAMP OUTPUT

This screen will display overall hot gas reheat status which includes active

setpoint, supply air discharge temperature, hot gas reheat enable/disable, and hot

gas reheat control loop being sent from the controller.

SUPPLY SPACE STATIC

This screen displays status points if the unit is configured for space static

pressure control. Status points include controller output ramp, static pressure

in the space, and the space static pressure setpoint. Similar status screen will

appear for the exhaust fan if the unit is configured for exhaust fan space static

control.

SUPPLY/RETURN DUCT STATIC

This screen displays status points if the unit is configured for duct static pressure

control. Status points include controller output ramp, static pressure in the duct,

and the duct static pressure setpoint. Similar status screen will appear for the

exhaust fan if the unit is configured for exhaust fan duct static control.

DEFROST RAMP OUTPUT

This screen only appears if the unit has an energy recovery wheel and a frost

control method was provided on the unit.

Upon sensing a high differential pressure across the energy wheel, the unit will

go into defrost if the outside air temperature is below the defrost temperature

setpoint.

Unit Status Overview

Microprocessor Controller for DOAS18

Unit Enable

The controller is equipped with several menus to help guide users with altering program parameters. The following

menus can be accessed by pressing the

button. To enter the desired menu, press the button.

The Unit Enable menu allows the user to enable and disable the unit through the

controller. Reference sequence of operation for additional unit starts/stop details.

The unit ships from the factory in a disabled state. To allow the unit to operate,

the controller must receive a run command from digital input ID4. Jumper unit

terminals R - G to allow the unit to operate.

Change to (Enabled/Disabled): Enables user to manually turn unit on/off via

display. Unit terminal G must have 24 VAC power to enable the unit.

Outdoor Air Reset Function

45°

50°

55°

60°

65°

50° 55° 60° 65° 70°

Outside Air Temperature (°F)

Supply Air Set Point (°F)

70°

75°

Control Variables

The Controls Variables menu allows the user to view and adjust unit control

parameters.

METHOD FOR TEMPERATURE CONTROL

Possible Setpoint Sources:

Supply Temp Control – The supply discharge setpoint to be a constant value (e.g.

72°F). Reference Temperature Setpoint screen for setpoint adjustment.

Space Reset – The controller will reset the supply air temperature set point to

maintain the room temperature set point (requires room temp sensor). Reference

the Temperature Setpoint screen for room setpoint adjustment.

Return Reset – The controller will reset the supply air temperature set point to

maintain the return air temperature set point (requires duct mounted return air

temp sensor). Reference the Temperature Setpoint screen for return air setpoint

adjustment.

OA Reset – The controller monitors the outdoor air temperature and adjusts the

desired supply temperature set point accordingly. For example, when the outdoor

air is below 55°F, the controller will change the supply set point to 70°F. If the

outdoor air is above 65°F, the controller will change the supply set point to 55°F.

If the outdoor air temperature is between 55°F and 65°F, the supply set point

changes according to the outdoor air reset function. A visual representation of

the outdoor air reset function is shown below. Reference Outside Setpoints for

minimum and maximum outside air limits.

Control Variables

Temp Control

The Temperature Control menu allows the user to view and adjust temperature

control conditions of the unit.

Microprocessor Controller for DOAS 19

OUTSIDE SETPOINTS

This screen only appears if outside reset is selected as the reset control mode.

TEMPERATURE SETPOINT

This screen only appears if supply temp control, space reset, or return reset is

selected as the reset control mode.

Possible Setpoint Sources:

Local – The room set point will be constant; set from screen (e.g. 72°F).

BMS – The BMS can directly control the room temperature set point (requires

BMS communication option).

T-Stat – The room set point will be adjustable from the room thermostat.

Reference Appendix: Room Thermostat Quick Start for additional information.

HEAT COOL DEADBAND

This screen only appears if space reset or return air reset is selected as the reset

control mode. The heat cool deadband allows for separate cooling and heating

setpoints when the reset control mode is set for space reset or return air reset.

SUPPLY SETPOINTS

Cooling and heating supply setpoints screens only appear if outdoor reset,

space reset, or return air reset is selected. These screens allow the user to set

the minimum and maximum setpoint limits for cooling or heating operation.

The controller will adjust the supply temperature setpoint between the set limits

depending on mode of operation.

COOLING LOCKOUT

This screen displays the cooling lockout temperature. Cooling will be disabled

when outside air is below the cooling lockout temperature (55ºF).

MODE SWITCH DISPLAY

This screen displays the delay time required before switching between heating

and cooling mode.

STARTUP DISPLAY

This screen displays the delay time after the fans have started and tempering

begins

Microprocessor Controller for DOAS20

HEATING LOCKOUT

This screen displays the heating lockout temperature. Heating will be disabled

when outside air is above the cooling lockout temperature (80ºF).

SPACE SETPOINTS DURING THE UNOCCUPIED MODE

The controller will have separate screens for unoccupied cooling and heating

setpoints. Reference Occupied control variables for further detail.

Unoccupied Cooling Example: If setpoint = 80ºF, unoccupied cooling is enabled

when room equals 80ºF and above. Unoccupied cooling is disabled when room

temperature is below 75ºF.

Unoccupied Heating Example: If setpoint = 60ºF, unoccupied heating is enabled

when room temperature equals 60ºF and below. Unoccupied heating is disabled

when room temperature is above 65ºF.

THIS SCREEN DISPLAYS METHOD FOR DEHUMIDIFICATION.

Possible Methods:

• Outside Air Temp is greater than cold coil setpoint plus offset (10ºF)

• Inside RH*

• Inside dew point*

• Outside dew point

• Inside RH or inside dew point*

• Inside RH or inside dew point or outside dew point

• Inside RH and inside dew point*

• Inside RH and inside dew point or outside dew point

*Available during unoccupied mode.

There must be a constant call for dehumidification for the duration of the enable

delay for dehumidification mode to become enabled. The call remains active

until conditions are satisfied and dehumidification mode has been active for

the minimum active time. Reference Ctrl Variables/Advanced/Unit Config/Unit

Configuration Occupied Dehum Call for dehumidification method options.

THIS SCREEN DISPLAYS METHOD FOR DEHUMIDIFICATION IN UNOCCUPIED MODE.

If the unit is unoccupied while there is a dehumidification call, the unit will start

and dehumidify until the unoccupied dehumidification setpoints are satisfied.

The above dehumidification modes marked with an * indicate availability during

unoccupied mode. The unoccupied dehumidification mode can be set differently

than the occupied dehumidification mode. Reference Ctrl Variables/Advanced/

Unit Config/Unit Configuration Unoccupied Dehum Call for dehumidification

method options.

Control Variables

Dehumidification

The Dehumidification menu allows the user to view and adjust dehumidification

control parameters.

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Greenheck 483586 Microprocessor Controller DOAS v3.001 December 2018 Reference guide

Brand: Greenheck

Model: 483586 Microprocessor Controller DOAS v3.001 December 2018

Category: Split-system air conditioners

Type: Reference guide

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Greenheck 483586 Microprocessor Controller DOAS v3.001 December 2018 Reference guide

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Greenheck 483586 Microprocessor Controller DOAS v3.001 December 2018 Reference guide

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