Greenheck Microprocessor Controller (474706 IOM) TAP v1.04 June 2011 (ERCH, ERH, APEX, VER, ERT) User Manual
Page 9
9
DDC Controller for Tempered Air Products
Heating Status
Heater Control:
000%
Hot Gas Reheat:
000%
Staged reheat is:
ON
Compressor:
1 2
STATUS LINE
Preheat Status
Preheat:
OFF
STATUS LINE
h
eaT
and
reheaT
operaTion
is
displayed
. (
if
equipped
)
Heater Control displays the proportional percentage of the heater analog
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). The heating control output
can be configured to DIRECT / REVERSE acting, along with the minimum and
maximum output voltages by entering the MANUFACTURER menu.
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.
0% = 0 VDC – OFF
1% = 0 VDC – MINIMUM TURNDOWN ENABLED
1 - 100% = 0 - 10 VDC = FURNACE MODULATION
Heat Pump Heating: The Heater Control % displays internal heating ramp as a
percent. Compressor operation is displayed when engaged.
• 1 = First Staged Compressor Operation
• 2 = Second Staged Compressor Operation
Hot Gas Reheat:
If hot gas reheat is staged control:
“Staged reheat is: ON/OFF” will indicate operation.
If hot gas reheat is modulating bypass damper control:
0% = OFF
1% - 100% = 4 - 10 VDC = AIRFLOW DAMPER MODULATION
If hot gas reheat is modulating valve control:
0% = OFF
1% - 100% = 0 - 10 VDC = HOT GAS REHEAT VALVE MODULATION
T
his
screen
indicaTes
elecTric
preheaT
operaTion
. (
if
equipped
)
This screen appears if Electric Preheat frost control was provided.
®