System Verification; Main Control Boards; Upm Board - Carrier GC Series Installation Instructions Manual

Cooling Airflows:
Quiet: lowest airflow (~300CFM pr ton)
S
Comfort: Default (varied on temp/humidity)
S
Efficiency: (1 and 2) (fixed and no dehum)
S
Max: (~400 CFM pr ton) (no dehum)
S
Heating Airflows:
Comfort: Default (varied on temp/humidity)
S
Efficiency: (1 and 2) (fixed and no dehum)
S
Max: (~400 CFM pr ton) (no dehum)
S
Check out mode can now be accessed to check out cooling or
heating modes for up to 120 minutes and can be stopped at any
time. Start in high stage cooling for 1st 10 minutes of operation.
HRP feature should be turn off during unit performance checks.
j Verify high cool
j Verify low cool
j Verify high heat
j Verify low heat
j Verify Electric Heat Operation in emergency and auxiliary heat
mode if applicable
j Conduct System Verification per the section below and the
start- -up checklist.
j Set up the thermostat for normal operation, set up customer
preferences for programming
j Make sure company logo and contact info has been added to
UI.
j Explain thermostat operation and maintenance to the
homeowner.

SYSTEM VERIFICATION

j The unit is shipped with a Unit Start- -up Checklist in the
literature package. Complete the Start- -up Checklist as you
check the items below, and save it in the customer's file at
your dealership.
j HRP feature should be turned off during unit performance
checks.
j Start in high stage cooling for 1st 10 minutes of operation.
j Allow the unit to operate for minimum of 5 minutes between
system changes to stabilize before checking system
performance.
Note: It is not recommended to access the refrigerant system at
start up on package units. Access should only be necessary as
last resort in troubleshooting to prevent unnecessary charge
issues.
j Check the water flow and operating conditions. Reference
Table 10.
Note: Tables typically show 3 GPM rates for each unit size. Rates
are described from top to bottom listed as:
Top listed GPM: minimum suggested for open loop.
Middle listed GPM: minimum suggested for closed loop.
Bottom listed GPM: Suggested rate for closed loop.
j Verify the unit is operating within 10% of the Heat of
Extraction (HE)/Heat of Rejection (HR) published in the unit
Product Data Performance tables. Access Product Data on
HVAC Partners.
a. HE/HR= GPM x TD x Fluid Factor (500 for water, 485
for antifreeze).
b. Utilize Ht. Abs Btu/hr in heating mode for capacity.
c. Utilize Ht. Rej Btu/hr in cooling mode for capacity.

MAIN CONTROL BOARDS

The GC unit is designed as a package unit containing similar
components as those found in an outdoor refrigeration split system
and also those found in an indoor fan coil system. This unit has an
electrical box (E- -box) that contains both of the main control
boards of this package unit and more. Refer to Fig. 16 for typical
board locations in the E- -box.
The unitary protection module (UPM) is the board that provides
the system protection and compressor operation control (see Fig.
23).
The electronically commutated module (ECM) is the board that
controls the blower motor (see Fig 28).
The electrical box is designed to allow servicing behind the box
relatively easily to access reversing valve, etc. The 2- -3 screws on
the bottom of the electrical box could be removed and with wiring
all out one side of the box carefully swing box in direction of the
wiring bundle to allow access to components behind the box if
necessary. Remember that all sides of the cabinet are accessible but
in event the unit is placed where all sides make this difficult,
removal of the box may help.
The transformer is a 75va transformer which should provide ample
power for accessories. Size loads properly so they do not exceed
capability of the transformer.
The transformer allows 208/230V selection with the factory default
of 230V. The transformer has a 5amp circuit breaker internally
built in for class 2 rating. See Fig. 22.
The circuit board has a 3 amp fuse that should identify any issues
before the 5 amp circuit breaker trips. In an unlikely event of the
transformer 5 amp circuit breaker tripping, it has a manual reset.
Fig. 22 - - Transformer

UPM Board

4
3
7
1
2
18 19
8
9
10
11
1. PL2 LPS Low pressure switch
2. PL3 HPS: High pressure switch
3. SEC1 and SEC2: Transformer
4. VS: Start circuit high volt.
5. L2 and L1: Contactor and high
voltage
6. PWM1 and PWM2: N/A
7. F1: 3 amp fuse
8. PL5: Compressor plug
19
5
6
13
12
11. C W 1 Y 1 Y2 0: Standard tstat
connection
12. J2 Speed Up Timer: Test jumper
(not operable for GC communicating
models).
13. S1: DIP Switches
14. PL8 Model: Model plug conn.
15. PL6 FRZ1: Water coil freeze sen-
sor
16. PL6 OPT: N/A
17. PL1 RVS: Reversing valve plug
18. LED1 COMM: Comm status light
17
15
16
14