Unit installation

5
5. GENERAL INFORMATION
The 6535 series package heat pumps are intended only for
installation by RV manufacturers. The units are for “off the
roof” installations and will usually be installed under the floor
of the vehicle. It is understood that the vehicle manufacturer
has provided an installation area which allows for floor cutouts
and unit mounting without cutting vital frame members or
electrical wiring and that structural members in the installation
area will not create restrictions by passing through airways
required by the heat pump.
Conditioned air is delivered from the unit to the interior of the
vehicle through ducting that is supplied and installed by the
vehicle manufacturer. The system return air duct, return air
filter and filter retainer are also supplied by the vehicle
manufacturer.
The heat pump is powered by two separate 115 volt
20 AMP electrical services.
The heat pump is controlled by a 12 VDC electronic wall
mounted thermostat. The vehicle manufacturer must provide
the power source for the thermostat.
Avoid sliding the unit without the shipping block being
attached. The condensate drain fitting extends slightly below
the pan and will be damaged if not protected.
6. UNIT INSTALLATION
CONDENSING AIR FLOW
The heat pump draws in outside air for what is referred to as
the outdoor coil. The air that is drawn across the outdoor coil
is the outdoor air flow.
The installer is responsible for the proper ducting and routing
of the outdoor air flow.
The outdoor air flow is drawn in through the side of the air
conditioner (across the outdoor coil), and discharged out
through the bottom of the appliance (through the discharge
opening). Figures 1 and 2 show the location of both the
outdoor coil and discharge air opening.
The unit must be installed so that the side that houses both the
outdoor coil and the electrical box, faces towards the outer
skin of the vehicle. The unit is installed this way so that:
1) the outdoor air flow will be drawn in
from the outdoors through the side of the
vehicle; and
2) the heat pump can be serviced electrically.
To provide adequate air flow, the installer must adhere to the
following guidelines:
1) Install the heat pump so that the outdoor
coil faces the outer skin of the vehicle; and
2) The outdoor air path to the coil should be as
direct and non-restrictive as possible. RV
Products recommends placing the exterior
condenser air flow grille into the side of the
vehicle, directly in front of the outdoor coil.
The installer must provide the exterior air
opening and/or grille.
3) Any decorative grille or louver used as an
opening should have 460 square inches of
free area minimum.
4) Do not block or restrict the discharge air
opening (located in the bottom of the air
conditioner) with any flooring or bracing.
5) The air being used by the outdoor coil
cannot be drawn from the underside of the
vehicle. Seal or baffle the sides and bottom
edge of the heat pump to prevent the
recirculation of air from underneath the
vehicle. Recirculation of air across the
outdoor coil will decrease both system
performance and equipment life.
6) Do not install any other heat generating
appliance in the same cavity as the heat
pump. Additional heat in this cavity
will decrease system performance in the
cooling mode. Overall package dimensions
are shown in Figure 1. RV Products
requires that a minimum of 4 additional
inches be allowed at the wiring box end of
the unit to allow for the installation of both
the low and high voltage wiring.
7) Insure that neither the vehicle engine
exhaust, on-board generator engine exhaust
or water heater vent exhaust are pulled into
the outdoor coil air flow. These hot
gases will both: (a) increase system
temperature reducing performance and
equipment life; and (b) the collection of
these gases chemical by-products will begin