SYSTEM ENGINEERING
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HEAT PUMP CONDENSING UNIT ENGINEERING MANUAL
Due to our policy of continuous product innovation, some specifications may change without notification.
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Clearance Requirements—General
Proper airflow through the outdoor unit coil is critical for proper unit operation. Figures 17 through 32
illustrate minimum space requirements for various installation scenarios for the ARUN036GS2 (3.0 ton),
ARUN047GS2 (4.0 ton), and ARUN053GS2 (4.4 ton). Use the hot isle/cold isle (back to back or face to
face) approach when placing multiple units in close proximity to each other. Outdoor unit fans draw air
from the back of the unit and discharges out the front.
Figure 19: Single Unit—high rear wall with
or without high side walls
Figure 18: Single Unit—high rear wall
and low front wall with no side walls
CLEARANCE REQUIREMENTS
Figure 21: Side by Side—high rear and
side walls
Outdoor Unit Minimum Clearance
Figure 24: Single Unit—high rear
wall and low front wall with building
overhang and no side walls
Legend:
LR = Rear wall height
LF = Front wall height
H = Unit height
egend:
R = Rear wall hei
ht
F = Front wall hei
ht
= Unit hei
ht
Figure 20: Single Unit—high rear and
front walls with no side walls
Figure 23: Single Unit— high front and
rear walls with building overhang and
no side walls
Figure 17: Single Unit—high front wall
with building overhang and no side walls
Note:
Installation clearances must comply
with local building codes.
All fi gures not to scale.
Never place multiple units facing back
to front or front to back as shown below.
High and low system pressure problems
may occur.
Airflow
Min. 6"
"6 .niM
"02
x
a M
Airow
Min. 40"
Min. 6"
Figure 22: Single Unit—high rear and side
walls with building overhang
H ≤ L
L
Max 20”
Min 40”
Min 12”
Min 40”
Airow
H
Min. 20"
Min. 20"
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