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WARNING
!
Disconnect all power to unit before starting maintenance. Failure to do so
can cause electrical shock resulting in severe personal injury or death.
•
Frequent washing of the cabinet, fan blade and coil with fresh water will remove
most of the salt or other contaminants that build up on the unit.
•
Regular cleaning and waxing of the cabinet with an automobile polish will pro-
vide some protection.
•
A liquid cleaner may be used several times a year to remove matter that will not
wash off with water.
Several different types of protective coil coatings are offered in some areas. These
coatings may provide some benefit, but the effectiveness of such coating materials
cannot be verified by the equipment manufacturer.
3.2 HEAT PUMP LOCATION
Consult local and national building codes and ordinances for special installation
requirements. Following location information will provide longer life and simplified
servicing of the outdoor heat pump.
NOTE: These units must be installed outdoors. No ductwork can be attached, or
other modifications made, to the discharge grille. Modifications will affect perfor-
mance or operation.
3.3 OPERATIONAL ISSUES
•
IMPORTANT: Locate the unit in a manner that will not prevent, impair or com-
promise the performance of other equipment horizontally installed in proximity
to the unit. Maintain all required minimum distances to gas and electric meters,
dryer vents, exhaust and inlet openings. In the absence of National Codes, or
manaufacturers' recommendations, local code recommendations and require-
ments will take presidence.
•
Refrigerant piping and wiring should be properly sized and kept as short as
possible to avoid capacity losses and increased operating costs.
•
Locate the unit where water run off will not create a problem with the equip-
ment. Position the unit away from the drip edge of the roof whenever possible.
Units are weatherized, but can be affected by the following:
o Water from the junction of rooflines, without protective guttering, entering the
heat pump while in operation, can impact fan blade or motor life. Coil dam-
age may occur to a heat pump if moisture cannot drain from the unit under
freezing conditions.
o Freezing moisture, or sleeting conditions, can cause the cabinet to ice-over
prematurely and prevent heat pump operation, requiring backup heat, which
generally results in less economical operation.
•
Closely follow clearance recommendations (see Figure 1).
o 24" to the service panel access
o 60" above heat pump fan discharge (unit top) to prevent recirculation
o 6" to heat pump coil grille air inlets (per heat pump).
3.4 FOR UNITS WITH SPACE LIMITATIONS
In the event that a space limitation exists, we will permit the following clearances:
Single Unit Applications: Heat pump grille side clearances below 6 inches will
reduce unit capacity and efficiency. Do not reduce the 60-inch discharge, or the 24-
inch service clearances.
Multiple Unit Applications: When multiple heat pump grille sides are aligned, a 6-
inch per unit clearance is recommended, for a total of 12 inches between multiple
units. Two combined clearances below 12 inches will reduce capacity and efficien-
cy. Do not reduce the 60-inch discharge, or 24-inch service clearances.
•
Do not obstruct the bottom drain opening in the heat pump base pan. It is
essential to provide defrost condensate drainage to prevent possible refreezing
of the condensation. Provide a base pad for mounting the unit, which is slightly
pitched away from the structure. Route condensate off the base pad to an area
which will not become slippery and result in personal injury.
7
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