Start−Up, Premierlink] Controls - Carrier 48TC 17 Series Service And Maintenance Instructions

Heating
1. Purge gas supply line of air by opening union ahead
of the gas valve. If gas odor is detected, tighten union
and wait 5 minutes before proceeding.
2. Turn on electrical supply and manual gas valve.
3. Set system switch selector at HEAT position and fan
switch at AUTO. or ON position. Set heating temper-
ature lever above room temperature.
4. The induced−draft motor will start.
5. After a call for heating, the main burners should light
within 5 seconds. If the burner does not light, then
there is a 22−second delay before another 5−second
try. If the burner still does not light, the time delay is
repeated. If the burner does not light within 15
minutes, there is a lockout. To reset the control, break
the 24 v power to W1.
6. The evaporator−fan motor will turn on 45 seconds
after burner ignition.
7. The evaporator−fan motor will turn off in 45 seconds
after the thermostat temperature is satisfied.
8. Adjust airflow to obtain a temperature rise within the
range specified on the unit nameplate.
NOTE: The default value for the evaporator−fan motor
on/off delay is 45 seconds. The Integrated Gas Unit
Controller (IGC) modifies this value when abnormal limit
switch cycles occur. Based upon unit operating conditions,
the on delay can be reduced to 0 seconds and the off delay
can be extended to 180 seconds. When one flash of the
LED is observed, the evaporator−fan on/off delay has
been modified.
If the limit switch trips at the start of the heating cycle
during the evaporator on delay, the time period of the on
delay for the next cycle will be 5 seconds less than the
time at which the switch tripped. (Example: If the limit
switch trips at 30 seconds, the evaporator−fan on delay for
the next cycle will occur at 25 seconds.) To prevent
short−cycling, a 5−second reduction will only occur if a
minimum of 10 minutes has elapsed since the last call for
heating.
The evaporator−fan off delay can also be modified. Once
the call for heating has ended, there is a 10−minute period
during which the modification can occur. If the limit
switch trips during this period, the evaporator−fan off
delay will increase by 15 seconds. A maximum of 9 trips
can occur, extending the evaporator−fan off delay to 180
seconds.
To restore the original default value, reset the power to the
unit.
To shut off unit, set system selector switch at OFF
position. Resetting heating selector lever below room
temperature will temporarily shut unit off until space
temperature falls below thermostat setting.
Ventilation (Continuous Fan)
Set fan and system selector switches at ON and OFF
positions, respectively.
continuously to provide constant air circulation. When the
Evaporator fan operates
evaporator−fan selector switch is turned to the OFF
position, there is a 30−second delay before the fan turns
off.
START−UP, PREMIERLINK] CONTROLS
WARNING
!
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal
injury or death.
The unit must be electrically grounded in accordance
with local codes and NEC ANSI/NFPA 70 (American
National Standards Institute/National Fire Protection
Association.)
Use the Carrier network communication software to start
up and configure the PremierLink controller.
Changes can be made using the ComfortWORKSr
software, ComfortVIEWt software, Network Service
Tool, System Pilott device, or Touch Pilott device. The
System Pilot and Touch Pilot are portable interface
devices that allow the user to change system set−up and
setpoints from a zone sensor or terminal control module.
During start−up, the Carrier software can also be used to
verify communication with PremierLinkt controller.
NOTE: All set−up and setpoint configurations are factory
set and field−adjustable.
For specific operating instructions, refer to the literature
provided with user interface software.
NOTICE
SET−UP INSTRUCTIONS
All set−up and set point configurations are factory set
and field−adjustable.
Refer to the PremierLinkt Installation, Start−Up and
Configuration Instructions for specific operating
instructions for the controller. Have a copy of this
manual available at unit start−up.
Perform System Check−Out
1. Check correctness and tightness of all power and
communication connections.
2. At the unit, check fan and system controls for proper
operation.
3. At the unit, check electrical system and connections
of any optional electric reheat coil.
4. Check to be sure the area around the unit is clear of
construction dirt and debris.
5. Check that final filters are installed in the unit. Dust
and debris can adversely affect system operation.
6. Verify that the PremierLink controls are properly con-
nected to the CCN bus.
62