Carrier 38QUS014DS2 Serie Manual De Instalación página 22

8. AIR EVACUATION
8.4 Note On Adding Refrigerant
CAUTION
• Refrigerant charging must be performed after wiring, vacuuming, and the leak testing.
DO NOT exceed the maximum allowable quantity of refrigerant or overcharge the system.
•
Doing so can damage the unit or impact it's functioning.
• Charging with unsuitable substances may cause explosions or accidents. Ensure that the
appropriate refrigerant is used.
• Refrigerant containers must be opened slowly. Always use protective gear when charging the system.
DO NOT mix refrigerants types.
•
N=2(one-twin models), N=3(one-three models), N=4(one-four models), N=5(one-five models).Depending on the length
of connective piping or the pressure of the evacuated system, you made need to add refrigerant. Refer to table
below for refrigerant amounts to be added:
ADDITIONAL REFRIGERANT PER PIPE LENGTH
Connective Pipe Air Purging
Length Method
Pre-charge pipe length(ft/m)
Vacuum Pump
(Standard pipe lengthxN)
More than
Vacuum Pump
(Standard pipe lengthxN)ft/m
Note: 1) Please use tools for R410A/R32 system respectively;
2) The standard pipe length is 7.5m (24.6'). When the pipe length is over 7.5m, the additional
refrigerant should be added according to the piping length.
8.5 Safety And Leakage Check
Electrical safety check
Perform the electrical safety check after
completing installation. Cover the following areas:
1. Insulated resistance
The insulated resistance must be more than 2MΩ.
2. Grounding work
After finishing grounding work, measure the grounding
resistance by visual detection and using the grounding
resistance tester.
Make sure the grounding resistance is less than 4Ω.
3. Electrical leakage check (performing during test while
unit is on)
During a test operation after completed installation,
use the electroprobe and multimeter to perform an
electrical leakage check. Turn off the unit immediately
if leakage happens. Try and evaluate different solutions
until the unit operates properly.
GB-21 7
All manuals and user guides at all-guides.com
Liquid Side: Ø 6.35 (Ø 1/4")
(Total pipe length - standard pipe lengthxN) x15g/m /
(Total pipe length - standard pipe lengthxN) x12g/m
Gas leak check
1. Soap water method:
2. Leak detector
NOTE: The illustration is for example purposes
only. The actual order of A, B, C, D, and E on the
machine may be slightly different from the unit
you purchased but the general shape will remain
the same.
Outdoor unit
check point
Additional Refrigerant
(
R410A/R32)
N/A
Liquid Side: Ø 9.52 (Ø 3/8")
(Total pipe length - standard pipe lengthxN) x30g/m /
(Total pipe length - standard pipe lengthxN) x24g/m
Apply a soap-water solution or a liquid neutral detergent
on the indoor unit connection or outdoor unit connections
with a soft brush to check for leakage of the connecting
points of the piping. If bubbles emerge, the pipes are
experiencing leakage.
Use the leak detector to check for leakage.
Indoor unit
check point
Fig. 8.4
A, B,C,D are points for the one-four type.
A, B,C,D, and E are points for the one-five type.