Unit Test Sheet - Trane CGCN Installation Operation & Maintenance

Unit test sheet

It is advisable to periodically detect the following operating data to verify the correct functionality of the unit in
time. These data will also be of great benefit to the technicians who carry out routine and / or extraordinary unit
maintenance.
Water side measurements
Chilled water setpoint °C _________
Evaporator outgoing water temperature °C _________
Evaporator ingoing water temperature °C _________
Evaporator pressure drop kPa _________
Evaporator water flow rate m
Refrigerant side measurements
Circuit #1:
Compressor Load _____ %
N° of active fans _____
N° of expansion valve cycles (electronic only) _____
Refrigerant/ Oils pressure
Evaporation pressure _____ Bar
Condensation pressure _____ Bar
Oil pressure _____ Bar
Refrigerant temperature Saturated evaporation temperature _____ °C
Intake gas pressure _____ °C
Intake overheating _____ °C
Saturated condensation temperature _____ °C
Delivery overheating _____ °C
Liquid temperature _____ °C
Undercooling _____ °C
Circuit #2
Compressor Load _____ %
N° of active fans _____
N° of expansion valve cycles (electronic only) _____
Refrigerant/ Oils pressure
Evaporation pressure _____ Bar
Condensation pressure _____ Bar
Oil pressure _____ Bar
Refrigerant temperature Saturated evaporation temperature _____ °C
Intake gas pressure _____ °C
Intake overheating _____ °C
Saturated condensation temperature _____ °C
Delivery overheating _____ °C
Liquid temperature _____ °C
Undercooling _____ °C
External air temperature _____ °C
Electrical measurements
Analysis of the unit's voltage unbalance:
Phases:
Unbalanced
Unbalance %: ((V max - V average) / V average) x 100 = _______%
Compressors current – Phases:
Compressor #1
Compressor #2
Fan Current i:
/h _________
3
RS
_____ V _____ V
R
_____ A
_____ A
#1 _____ A #2 _____ A
#3 _____ A #4 _____ A
#5 _____ A #6 _____ A
#7 _____ A #8 _____ A
ST RT
_____ V
S
_____ A
_____ A
T
_____ A
_____ A