Klimaire CSM42H2P16 - Manual (Page 17)

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8 .2 CHARGING BY WEIGHT
For a new installation, evacuation of interconnecting tubing and indoor coil is
adeq uate; otherwise, evacuate the entire system. Note that charge value includes
charge required for 25 ft. of standard size interconnecti ng liquid line. Calculate actua l
With an accurate scale (+/ - 1 oz.) or volumetric char ging device, adjust charge
diff erence between that shown on the unit data plate and that calculated for the new
system Installation. if the entire system has been evacua ted, add the total calculated
charge.
8.3 FINAL LEAK TESTING
After the unit has been properly evacuated and charged, a halogen leak detector
should be used to detect leaks in the system. All piping within the condensing unit,
evaporator, and interconnec ting tubing should be check
ed for leaks. If a leak is
detected, the refrigerant should be recovered before repairing the leak. The Clean Air
Act prohibits releasing refrigerant into the atmosphere .
Charge for all systems should be checked against the Charging Chart inside the
access corner panel.
IMPORTANT:Do not operate the compressor without charge in system. Additio n of
R - 410A will raise pressures (vapor, liquid and discharge).
If adding R - 410A raises both vapor pressure and temperature, the unit is over -
c harged.
IMPORTANT: Use industry - approved charging methods to ensure proper system
charge.
8 .1 CHARGING BY LI Q UID PRESSURE
The liquid pressure method is used for charging systems in the cooling and heating
mode. The service port on the liquid (small valve) and suction (large valve) is used
for this purpose.
Verify th at the outdoor unit is running and the indoor air mover is delivering the
maximum airflow for this system size. Read and record the outdoor ambient tem -
p erature. Read and record the liquid and suction pressures at the ports on the liquid
and suction valves.
If refrigerant lines are sized using the n ameplate charge, the correct liquid pressure is
found at the intersection of the suction pressure and the outdoor ambient.
1. Remove refrigerant charge if the liquid pressure is above the chart value.
8.0 CHECKING REFRIGERANT CHARGE
2. Add refrigerant charge if the liquid pressure is below the chart value.
9.0 OWNER INSTRUCTIONS
Assist owner with processing Warranty cards and/or online registration. Review Owners
Guide and provide a copy to the ower and guidance on proper operation and main-
teance. Instruct the owner or the operator how to start, stop and adjust temperature
setting. The installer should instruct the owner on proper operation and maintenance of
all other system components.
charge required with installed liquid line size and length, please see 6.1 of table of
contents.