The Right Fit For Comfort
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DISCONNECT SWITCH
(Optional)
The disconnect switch ensure that all power to the
control box is disconnected for servicing.
MAINTENANCE
DANGER
Before servicing the VPAC/VPHP, disconnect power
to the unit. Failure to do so could result in serious
injury or electrical shock.
The VPAC/VPHP is designed and constructed for
reliability and long life minimal maintenance. Scheduled
maintenance inspections should be performed 4 times a
year. At the beginning of the cooling season, a complete
mechanical cooling check should be performed and periodic
minor inspections may be necessary during the cooling
season to adjust for variations in climate. At the beginning
of the heating season, a complete mechanical heating check
should be performed and, again, periodic minor inspections
may be necessary to adjust for climatic changes.
WARNING
It is illegal to discharge refrigerant into the atmosphere.
Use proper reclaiming methods and equipment when
repairing this unit. Service should be performed by a
qualified service agency.
1. Disconnect power to the unit.
2. Remove the access panel and do a visual check of
the equipment. Look for obvious changes in the unit
such as damaged coils or evidence of extended wear on
any moving parts. Check for unusual odors or leaks (ex:
burnt motor windings, water, or refrigerant) and make
sure the base pan is clean.
3. Regular cleaning of the filter is required. Allowing dust
to collect on the filter will cause the unit to lose efficiency
and eventually malfunction. Check filter once a month.
4. Inspect all electrical connections for frayed wires
and poor connections. Terminal ends that are loose
will eventually fail, causing a loss of performance or
worse.
5. Check fan motors and blower assemblies. Some
units may require a drop of light oil to motors and/or
bearing assemblies (look for oil cups). Check setscrews
and motor mounting hardware, making sure these are
tight.
6. Centrifugal fan blades and blower cage assemblies
must be clean to operate efficiently. Brush and/or
vacuum as necessary.
7. Inspect both indoor and outdoor coils. Use a fin comb
to straighten out any damaged fins. These coils must
be clean for proper operation.
IMPORTANT:
Do not use a solvent-based cleaner for
this as some solvents produce a noxious odor when
you start the fan or electric heat.
8. Look for oil leaks or stains on or around the coil and
refrigerant lines. The presence of oil here indicates a po-
tentially serious problem (such as a refrigerant leak).
9. Inspect and clean the drain pan and drain line(s).
A good idea here is to use an anti-fungicide tablet
to keep the condensate system free from bacterial
contaminants.
10. Check the “pitch” of the unit. Over time, the building
and equipment may settle, causing a shift in the
direction the condensate flows. Ideally, the unit should
pitch downwards from front to back to allow for proper
drainage.
11. Check weep holes along rear flange of the base pan,
making sure they are free of debris.
12. Check seal around the unit. Air leaks may make
the conditioned area uncomfortably drafty or produce
noises. Visually inspect the foam gasket between
the wall and the unit, especially taking note of the
separation between the air inlet for the condenser and
the condenser coil discharge. These two areas must
be sealed off from each other. If you experience poor
cooling operation or erratic operation, check for air
recirculation at the condenser coil.
13. Replace panels and reconnect the electrical
power.
TROUBLESHOOTING
NO HEAT OR COOLING
Check to see if the unit has power and if the thermostat
is satisfied. If the thermostat is not satisfied, call your
installing contractor or service contractor.
SEQUENCE OF OPERATION
MAINTENANCE
Continued
Summary of Contents for VPAC
Page 16: ......
