Sequence Of Operation; Initial Unit Start-Up; Start-Up Checklist And Log - Trane Axiom GEHB 006 Installation, Operation And Maintenance Manual

Initial Unit Start-up

Note: Start-up with the
conventional 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.
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.
4. Check the cooling refrigerant
pressures against values in
Figure 2, p. 79.
5. Turn the thermostat system
switch to the OFF position. Unit
should stop running and the
reversing valve should de-
energize.
6. Leave unit off for approximately
FIVE minutes to allow for
pressure equalization.
7. Turn the thermostat to the
lowest setting.
8. Set the thermostat system
switch to the HEAT position.
9. 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
78

Sequence of Operation

with no frost observed in the
refrigeration circuit.
10. Check the heating refrigerant
pressures against values in
Figure 2, p. 79.
11. Set the thermostat to maintain
the desired space temperature.
12. Instruct the owner on system
operation.
Table 1. Checklist
MODE Heat
Entering fluid
temperature _______F
Leaving fluid
temperature _______F
Temperature
differential _______F
Return-air
temperature DB/WB _______F
Supply-air
temperature DB/WB _______F
Temperature
differential _______F
Water coil heat
exchanger (Water
Pressure IN) _________PSIG
Water coil heat
exchanger (Water
Pressure OUT) _________PSIG
Pressure Differential _________PSIG
COMPRESSOR
Amps
Volts
Discharge line
temperature (after
10 minutes) _______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:_____________________
In order to minimize troubleshooting
and costly system failures, complete
the following checks and data entries
before the system is put into full
operation.
Cool
_______F
_______F
_______F
_______F
_______F
_______F
_________PSIG
_________PSIG
_________PSIG
_______F
WSHP-SVX01E-EN