T-CU11-OCT22-0
Check List
DURING COMMISSIONING
No.
Description
Check
1
Is the suction pressure decreasing and the discharge pressure increasing?
2
Is the compressor rotation correct (no abnormal noise and with compression)?
3
Is the crankcase oil level between 1/4 and 3/4 of the scroll compressor sight glass? (after
3 or 4 hours of operation)
4
Is the discharge temperature within the limits (between 50 °C and 90 °C)?
5
Is the suction superheat within the limits (between 5K and 20K) during normal operation?
6
Is the suction superheat within the limits (between 5K and 20K) after defrost operation?
7
Is the running current below overload relay setting value (rotary model) or maximum
operating current which printed on unit specfiication label?
8
Is warm air blowing out from the condenser fan?
9
Is the compressor On/Off cycle within the specification?
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Remarks: The system may only be handed over to user/owner if all questions can be answered
with “Yes”.
Additional advice:
•
Do not leave the system unattended until the system has reached its normal operating condition and the oil
charge has properly adjusted itself to maintain the proper level in the sight glass.
•
Check periodically the compressor performance and all the moving components during the first day of
operation.
•
Check the liquid line sight glass and expansion valve operation. If there is an indication that the system is low
on refrigerant, thoroughly check the system for leaks before adding refrigerant.
SITE RECORDS
Model:
Serial Number:
Model:
Serial Number:
TXV
Model:
Pipe Length (m):
Position of outdoor:
Above / below indoor unit
Height Differentiate:
Cut In (barg):
Differential (barg):
Temperature, Ts (
0
C):
Pressure, Ps (barg):
Temperature, Tc (
0
C):
Pressure, Pc (barg):
Before Defrost (A):
After Defrost (A):
Normal Operation (
0
C):
After Defrost (lowest) (
0
C):
Low pressure
switch settings
Outdoor
Indoor
Field Piping
Customer name:
Installer name:
Installation date:
Refrigerant type:
Outdoor ambient temperature:
Room thermostat setting:
Suction
Superheat
Liquid line
Suction Line
Subcool before TXV (
0
C):
Compressor
Current