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10.0 INSTRUCTING THE OWNER
10.1 MAINTENANCE
. Dirt should not be allowed to accumulate on the outdoor coils or other parts in the air
circuit. Clean as often as necessary to keep the unit clean. Use a brush, vacuum
cleaner attachment, or other suitable means.
2.
The outdoor fan motor is permanently lubricated and does not require periodic oiling.
3.
If the coil needs to be cleaned, it should be washed with Calgon Coilclean (mix one
part Coilclean to seven parts water). Allow solution to remain on coil for 30 minutes
before rinsing with clean water. Solution should not be permitted to come in contact
with painted surfaces.
4.
Refer to the furnace or air handler instructions for filter and blower motor maintenance.
5.
The indoor coil and drain pan should be inspected and cleaned regularly to assure
proper drainage.
CAUTION
It is unlawful to knowingly vent, release or discharge refrigerant into the open air
during repair, service, maintenance or the final disposal of this unit. When the
system is functioning properly and the owner has been fully instructed, secure the
owner’s approval.
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.
9 .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 15 ft. of standard size interconnecti ng liquid line. Calculate actua l
charge required with installed liquid line size and length using:
1/4” O.D. = . 3 oz./ft.
5/16” O.D. = .4 oz./ft
3/8” O.D. =
.6
oz./ft
1/2” O.D. = 1.2 oz./ft
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.
9 .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 checked 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 .
9 .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 that 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.
2. Add refrigerant charge if the liquid pressure is below the chart value.
1.
