Page 36mrcool.com
Refrigerant Piping Connection
AFTER PERFORMING GAS LEAK CHECKS
After confirming that all of the refrigerant
pipe connections points DO NOT leak, replace
the valve cover on the outside unit and wrap
and insulate the piping connections of the
indoor unit.
8
BEFORE TEST RUN
8
Using a soft brush or spray bottle, apply a soapy
water solution to all of the pipe connection points of
the indoor and outdoor units, watching to see if any
bubbles form. The presence of bubbles indicates
there is a leak.
There are two different methods to check for
gaseous leaks. Use Fig. 8.1 below as a guide for
the critical points to check for leaks.
Soap and Water Method
Leak Detector Method
If using a leak detector, refer to the device’s
operation/instruction manual for proper usage
instructions.
Gas Leak Checks
IF ELECTRICAL LEAKAGE IS DETECTED
If electrical leakage is detected, turn off the
unit immediately and call a licensed
electrician to find and resolve the cause of
the leakage.
After installation is complete, confirm that all
electrical wiring has been installed in accordance
with local and national regulations, and according
to the installation manual.
Check Grounding Work
Measure grounding resistance by visual detection
and with a grounding resistance tester. Grounding
resistance must be less than 0.1Ω.
NOTE: This may not be required for some
locations in North America.
Check for Electrical Leakage
During the Test Run, use an electroprobe and
multimeter to perform a comprehensive electrical
leakage test.
NOTE: This may not be required for some
locations in North America.
Electrical Safety Checks
DURING TEST RUN
WARNING – RISK OF
ELECTRICAL SHOCK
ALL WIRING MUST BE INSTALLED BY A
LICENSED ELECTRICIAN AND COMPLY WITH
LOCAL, STATE, AND NATIONAL ELECTRICAL
CODES.
A: Low pressure stop valve
B: High pressure stop valve
C & D: Indoor unit flare nuts
Check-point of indoor unit
Check-point of outdoor unit
A
B
C
D
Fig. 8.1
To Next Page
Loading...
Need help?
General
