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DUAL COMPRESSOR PACKAGED HEAT PUMP INSTALLATION GUIDE
General Installation Information
Safety Considerations
WARNING: Before performing service or
maintenance operations on a system, turn off main
power switches to the indoor unit. If applicable,
turn off the accessory heater power switch.
Electrical shock could cause personal injury.
Installing and servicing heating and air conditioning
equipment can be hazardous due to system pressure and
electrical components. Only trained and qualified service
personnel should install, repair or service heating and air
conditioning equipment. Untrained personnel can perform
the basic maintenance functions of cleaning coils and
cleaning and replacing filters. All other operations should
be performed by trained service personnel. When working
on heating and air conditioning equipment, observe
precautions in the literature, tags and labels attached to the
unit and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work
gloves. Use a quenching cloth for brazing operations and
have a fire extinguisher available.
Moving and Storage
Move units in the normal "up" orientation. Horizontal units
may be moved and stored per the information on the
packaging. Do not stack more than three units in total
height. Vertical units may be stored one upon another to
a maximum height of two units. Do not attempt to move
units while stacked. When the equipment is received, all
items should be carefully checked against the bill of lading
to be sure all crates and cartons have been received.
Examine units for shipping damage, removing the units
from the packaging if necessary. Units in question should
also be internally inspected. If any damage is noted, the
carrier should make the proper notation on the delivery
receipt, acknowledging the damage.
Unit Location
Locate the unit in an indoor area that allows for easy removal
of the filter and access panels. Location should have enough
space for service personnel to perform maintenance or
repair. Provide sufficient room to make water, electrical and
duct connection(s). If the unit is located in a confined space,
such as a closet, provisions must be made for return air to
freely enter the space by means of a louvered door, etc. Any
access panel screws that would be difficult to remove after
the unit is installed should be removed prior to setting the
unit. On horizontal units, allow adequate room below the
unit for a condensate drain trap and do not locate the unit
above supply piping. Care should be taken when units are
located in unconditioned spaces to prevent damage from
frozen water lines and excessive heat that could damage
electrical components.
Installing Vertical Units
Prior to setting the unit in place, remove and discard the
compressor hold down shipping bolt located at the front of
the compressor mounting bracket.
Vertical units are available in left or right air return
configurations. Top air discharge vertical units should be
mounted level on a vibration absorbing pad slightly larger
than the base to provide isolation between the unit and the
floor. It is not necessary to anchor the unit to the floor (see
below).
If access to the left side of the unit will be limited after
installation, remove the two mounting screws on the left side
of the control box before setting the unit (leave the two front
mounting screws intact). This will allow the control box to be
removed with only the two front mounting screws for future
service.
Figure 1: Vertical Unit Mounting
2 in. Extruded
Polystyrene
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