Trane Axiom GEH-E035, Installation, Operation And Maintenance Manual

Page: 91 / 124

WSHP-SVX01Y-EN 91
Start Up
Initial Unit Start-Up
N No otte e:: Start-up with the heat pump thermostat is
included below:
1. Set the thermostat to the highest position.
2. Set the thermostat system switch to COOL with the
fan control to AUTO. The compressor should NOT
run.
3. Reduce the thermostat setting until the compressor,
reversing valve, solenoid valve, and loop pump are
energized. Adjust water flow utilizing pressure/
temperature plugs and comparing to tables
contained in specification sheet data.
4. Water leaving the heat exchanger should be
warmer than the entering water temperature
(approximately 9-12ºF); blower operation should be
smooth; compressor and blower amps should be
within data plate ratings; the suction line should be
cool with no frost observed in the refrigerant circuit.
5. Check the cooling refrigerant pressures against
values in “Operating Pressures,” p. 91 .
6. Turn the thermostat system switch to the OFF
position. Unit should stop running and the
reversing valve should de-energize.
7. Leave unit off for approximately FIVE minutes to
allow for pressure equalization.
8. Turn the thermostat to the lowest setting.
9. Set the thermostat system switch to the HEAT
position.
10. Adjust the temperature setting upward until the unit
is energized. Warm air should blow from the
register. A water temperature decrease of
approximately 5-9ºF leaving the heat exchanger
should be noted. The blower and compressor
operation should be smooth with no frost observed
in the refrigeration circuit.
11. Check the heating refrigerant pressures against
values in “Operating Pressures,” p. 91 .
12. Set the thermostat to maintain the desired space
temperature.
13. Instruct the owner on system operation.
Table 53. Checklist
MODE Heat Cool
Entering fluid
temperature
_______F _______F
Leaving fluid
temperature
_______F _______F
Temperature
differential
_______F _______F
Table 53. Checklist (continued)
MODE Heat Cool
Return-air
temperature DB/
WB
_______F _______F
Supply-air
temperature DB/
WB
_______F _______F
Temperature
differential
_______F _______F
Water coil heat
exchanger (Water
Pressure IN)
________PSIG ________PSIG
Water coil heat
exchanger (Water
Pressure OUT)
________PSIG ________PSIG
Pressure
Differential
_________PSIG _________PSIG
COMPRESSOR
Amps
Volts
Discharge line
temperature (after
10 minutes)
_______F _______F
Start-Up Checklist and Log
Installing Contractor: Use this checklist to thoroughly
check-out the system and units before and during start-
up. (This form need not be returned to the factory
unless requested during technical service support).
Job Name:
Model Number:
Date:
Serial Number:
To minimize troubleshooting and costly system
failures, complete the following checks and data entries
before the system is put into full operation.
Operating Pressures
There are many variables (airflow, air temperatures) in
an air conditioning system that will affect operating
refrigerant pressures and temperatures. The charts
below shows approximate conditions and is based on
air flow at the rated SCFM, entering air at 80.6°F (DB),
66.2°F (WB) in cooling, 68°F (DB) in heating. (+)Heating
data with 35°F EWT is based on the use of an anti-
freeze solution having a freezing point 20°F lower than
the minimum expected entering temperature.