AHRI RJNL-B, Installation Instructions Manual

Page: 13 / 32

13
VI. INSTALLATION
A. GENERAL
1. PRE-INSTALLATION CHECK-POINTS
Before attempting any installation, the following points
should be carefully considered:
a. Structural strength of supporting members.
(rooftop installation)
b. Clearances and provision for servicing.
c. Power supply and wiring.
d. Air duct connections.
e. Drain facilities and connections.
f. Location for minimum noise.
2. LOCATION
These units are designed for outdoor installations. They
can be mounted on a slab or rooftop. They are not to be
installed within any part of a structure such as an attic,
crawl space, closet, or any other place where condenser
air flow is restricted or other than outdoor ambient condi-
tions prevail. Since the application of the units is of the
outdoor type, it is important to consult your local code
authorities at the time the first installation is made.
B. OUTSIDE SLAB INSTALLATION (Typical outdoor slab
installations are shown in Figures 7 and 8.)
1. Select a location where external water drainage cannot
collect around the unit.
2. Provide a level concrete slab extending 3" beyond all
four sides of the unit. The slab should be sufficient
above grade to prevent ground water from entering the
unit.
IMPORTANT: To prevent transmission of noise or
vibration, slab should not be connected to building
structure.
3. The location of the unit should be such as to provide
proper access for inspection and servicing.
4. Locate unit where operating sounds will not disturb
owner or neighbors.
5. Locate unit so roof runoff water does not pour directly on
the unit. Provide gutter or other shielding at roof level.
Do not locate unit in an area where excessive snow drift-
ing may occur or accumulate.
6. It is essential that the unit be elevated above the base
pad to allow for condensate drainage and possible
refreezing of condensation. Provide a base pad which is
slightly pitched away from the structure. Route conden-
sate off base pad to an area which will not become slip-
pery and result in personal injury.
7. Where snowfall is anticipated, the height of the unit
above the ground level must be considered. Mount unit
high enough to be above average area snowfall and to
allow for proper condensate drainage.
C. CLEARANCES
The following minimum clearances must be observed for
proper unit performance and serviceability.
1. Provide 48" minimum clearance at the front of the unit.
Provide 18" minimum clearance at all other sides of the
unit.
2. Provide 60" minimum clearance between top of unit and
maximum 3 foot overhang.
3. Unit is design certified for application on combustible
flooring with 0" minimum clearance.
4. See Figure 7 for illustration of minimum installation-ser-
vice clearances.
FIGURE 7
PACKAGED HEAT PUMP
OUTSIDE SLAB INSTALLATION, BASEMENT OR
CRAWL SPACE DISTRIBUTION SYSTEM
FIGURE 8
PACKAGED HEAT PUMP
OUTSIDE SLAB INSTALLATION, CLOSET DISTRIBUTION
SYSTEM. SLAB FLOOR CONSTRUCTION
A0722-02
A0720-02
RE
TU
RN
DU
CT
*
SUPPLY
AIR DUCT*
*FIELD SUPPLIED