Greenheck Microprocessor Controller (474706 IOM) TAP v1.04 June 2011 (ERCH, ERH, APEX, VER, ERT) User Manual
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17
DDC Controller for Tempered Air Products
T
his
screen
allows
The
user
To
override
The
heaTing
operaTion
.
This screen only appears if a heating operation was provided with the unit.
When the Heating Control is in the MANUAL mode, use the arrow buttons to
vary the heating output.
Electric Heater: The Heater Control % is proportional to the 0-10 VDC signal
being sent to the SCR controller, located in the electric heater control center.
0% Heating = 0 VDC - 0 kW output
100% Heating = 10 VDC - Max kW output
Hot Water: The Heater Control % is proportional to the 0-10 VDC signal being
sent to the heating control valve (BY OTHERS).
0% Heating = 0 VDC
100% Heating = 10 VDC
Indirect Gas: The Heater Control % is proportional to the 0-10 VDC signal
being sent to the indirect gas furnace controller, located in the indirect gas
control center. The first stage is on at 1% Heater Control. The furnace will then
modulate proportionally from minimum to maximum capacity. The furnace is
subject to minimum On/Off times and Heating Lockouts.
0% = 0 VDC – OFF
1% = 0 VDC – MINIMUM TURNDOWN ENABLED
1 - 100% = 0 - 10 VDC = FURNACE MODULATION
Heat Pump: The Heating % displays compressor engagement as a percent.
The compressors are subject to the minimum On/Off times and Heating
Lockouts. Compressors engage in sequence as described in the Compressor
Staging screen in the Manufacturer > Factory Settings menu.
T
his
screen
allows
The
user
To
override
The
hoT
gas
reheaT
operaTion
.
This screen only appears if modulating hot gas reheat option was provided with
the unit.
When the Hot Gas Reheat Loop Control is in the MANUAL mode, use the arrow
buttons to vary the reheat output.
T
his
screen
allows
The
user
To
override
The
hoT
gas
reheaT
operaTion
.
This screen only appears if On/Off hot gas reheat option was provided with the
unit.
When the Hot Gas Reheat Loop Control is in the MANUAL mode, us the arrow
buttons to turn the hot gas reheat ON or OFF.
T
his
screen
allows
The
user
To
override
The
cooling
operaTion
.
This screen only appears if a cooling operation was provided with the unit.
When the Cooling Control is in the MANUAL mode, use the arrow buttons to
vary the cooling output.
Chilled Water: The Cooling % is directly proportional to the 0 - 10 VDC output
signal.
0% Cooling = 0 VDC; 100% Cooling = 10 VDC
Packaged Cooling and Heat Pump: The Cooling % displays compressor
engagement as a percent. The compressors are subject to the minimum
On/Off times and Heating/Cooling Lockouts. Compressors engage in
sequence as described in the Compressor Staging screen in the
Manufacturer > Factory Settings menu.
T
his
screen
allows
The
user
To
override
The
energy
recovery
wheel
preheaTer
.
This screen only appears if an electric preheat frost control was provided with the
unit.
Wheel Preheat Override
Energy Recovery Wheel
Preheat Control:
Auto
Preheater:
OFF
Cooling Override
Cooling Control:
Auto
Cooling:
100%
Heating Override
Heating Control:
Auto
Heating:
100%
HotGas Reheat Override
Hot Gas Reheat
Loop Control:
Auto
Reheat:
OFF
HotGas Reheat Override
Hot Gas Reheat
Loop Control:
Auto
Reheat:
100%
®