13
Heating Test
The heating (HEAT) submenu is used to change output status for
the individual heat stages, gas or electric. The fans (FANS) and
cooling (COOL) service test outputs are reset to OFF for the
heating service test. Indoor and outdoor fans are controlled
normally to maintain proper unit operation. All normal heating
alarms and alerts are functional.
NOTE: Field terminal board terminal R must be connected to W1
for the heat to operate in service test. Alert number T410 will occur
as a reminder if not done. If the normal unit control mode is
thermostat mode, then remove the R--W1 jumper after completing
service test.
THIRD PARTY CONTROL
Third party controls may interface with the unit ComfortLink
controls through the connections described below. See other
sections of these instructions for more information on the related
unit control and configurations.
Cooling/Heating Control
The thermostat inputs are provided on the field connection terminal
board. The Unit Control Type configuration,
ConfigurationUNITU.CTL, must be 2 to recognize the
below inputs. Terminal R is the 24vac source for the following:
S Y1 = First stage cooling
S Y2 = Second stage cooling
S W1 = First stage heating
S W2 = Second stage heating
S G = Indoor fan
Dehumidification Control
On Humidi--MiZert, units the HUM terminal is provided on the
field connection terminal board. Humidity Switch configuration,
ConfigurationUNITRH.SW, identifies the normally open or
normally closed status of this input at LOW humidity.
NOTE: Dehumidification is considered a cooling function in the
software.
Remote Occupancy
The remote occupancy input is provided on the field connection
terminal board (TB). The Remote Occupancy Switch
configuration, ConfigurationUNITRM.SW, identifies the
normally open or normally closed status of this input when
unoccupied.
S RMOL = 24 VAC signal input
S R--2 = 24 VAC source for dry contact
Fire Shutdown
The fire shutdown input is provided for unit shutdown in response
to a fire alarm or smoke detector. The Fire Shutdown Switch
configuration, ConfigurationUNITFS.SW, identifies the
normally open or normally closed status of this input when there is
no fire alarm.
S FDWN = 24 VAC signal input
Alarm Output
The alarm output is provided on the field connection terminal
board to indicate a current alarm status. The output will be 24VAC
if a current alarm exists.
S C--2 = 24 VAC common
S X = 24 VAC signal output
Economizer Damper Control
For units with the economizer option or accessory and the ECB
control board, the damper position can be directly controlled
through the IAQ sensor input provided on the field connection
terminal board. The IAQ Analog Input configuration,
ConfigurationAIR.QIA.CF will have to set to 3 (Control
Minimum Position). When IA.CF = 3, an external 4 to 20 mA
source is used to move the damper 0% to 100% directly.
IAQ = 4--20mA + signal
COM = 4--20mA -- common
NOTE: In this mode, preset minimum positions configurations are
not valid, the damper position may exceed the input position to
provide economizer cooling and CO
2
sensor input can not be used
for DCV control. Refer to the Indoor Air Quality operation section
for more information.
ComfortLINK v1.X
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