Refrigerant Pipe; Air Evacuation; Leakage Test - Carrier SensatION 42QHB07D8S Installationsanleitung

4. REFRIGERANT PIPING WORK

4.3 REFRIGERANT PIPE

Minimum length
to reduce abnormal
vibration & noise
R32*
3m
* Please use tools for R32 system.
NOTE
Extended pipe length will affect the capacity and energy efficiency of the unit.
The nominal efficiency is tested based on the pipe length of 5 meter.
When the pipe length is over 5m, the additional refrigerant should be added according to the pipe length.
The max. pipe length is recommended as below.
Models
9K/12K
18K
24K
* Please use tools for R32 system.

4.4 AIR EVACUATION

Connect the charge hose from the manifold gauge to the service port of the gas side packed valve.
Connect the charge hose to the port of the vacuum pump.
Fully open the handle Lo of manifold gauge.
Operate the vacuum pump to evacuate air from the system until -76cmHg.
Close the handle Lo of manifold gauge.
Fully open the valve stem of the packed valves.
Remove the charging hose form the service port.
Securely tighten caps of packed valve.

4.5 LEAKAGE TEST

After the piping work is finished, make sure to check the connection part of each refrigerant pipe and confirm
that there is no gas leak by applying soapy water to them or by using a leak detector specific for HFC refrigerants.
Refer below picture for illustration.
Chargeless length
Liquid side:φ6.35mm
5m
Max. pipe length(m)
25
30
40
Manifold valve
Compound gauge
-76 cmHg
Handle Lo
Charge hose
Check-point of indoor unit
Check-point of outdoor unit
A: Low pressure stop valve
C& D: Indoor unit flare nuts
Additional charge per meter
Liquid side:φ9.52mm
12g
R32 Inverter
Max. height difference(m)
10
20
20
Pressure meter
Handle Hi
Charge hose
Vacuum pump
Packed valve
D
B
C
A
B: High pressure stop valve
24g
12