Carrier service manual
R410a DC Inverter 60Hz
Installation
107
Electric engineering
........................................
Select proper power cables
(signal cable, power cable)
.............................
(Signal cable should use 3-cores shielded wires)
Basement work for outdoor unit
..........................
Avoid short-circuit ventilation and ensure sufficient maintenance
space
Installing outdoor unit
......................................
Avoid short-circuit ventilation and ensure sufficient maintenance
space
Air tightness test
............................................
Check whether the air pressure remains at 4.0Mpa
(R410a)
after
correction is made within 24 hours
Vacuum drying
.......................................
Use vacuum pump that has a vacuum degree of less than -775mmHg
recharging refrigerant
......................................
Record the amount of refrigerant to be recharged on the outdoor
unit and document it
Installing decorative panel
................................
Ensure no gap between decorative panel and ceiling
Test Running and commissioning
........................
Run the indoor units one by one to check whether any pipe or cable
is incorrectly installed
Delivering operation instructions
.........................
Deliver related materials while providing operation instruction to the
user
Note:
The general procedure for refrigerant machine is subject to change according to the situation
1.2.3 Install indoor unit’s procedure
Note:
1. The hook must strong enough to sustain the weight of indoor unit.
2. Check the models of indoor units before installation.
3. Pay attention to the main devices, such as the pipeline.
4. Hold enough places for maintenance.
1.2.4 Refrigerant pipe procedure
1.2.5 Drainage pipe procedure
Confirm installation position
Label installation position
Install indoor units
Install hooks
Install indoor units
Install pipe
Weld
Add Nitrogen
Temporary pipeline
Flush
Pressure test
Vacuum dry
Drainpipe heat-insulation and test-run
Install indoor units
Connect drainpipe
Check water leakage