Installation
20
RT-SVX23G-EN
Foundation
Horizontal Units
If the unit is installed at ground level, elevate it above the
snow line. Provide concrete footings at each support
location with a “full perimeter” support structure or a slab
foundation for support. Refer to
Table 1, p. 19
for the unit’s
operating and point loading weights when constructing a
footing foundation.
If anchoring is required, anchor the unit to the slab using
hold down bolts or isolators. Isolators should be installed
to minimize the transmission of vibrations into the
building.
For rooftop applications, ensure the roof is strong enough
to support the combined unit and support structural
weight. If anchoring is required, anchor the unit to the roof
with hold-down bolts or isolators.
Check with a roofing contractor for proper waterproofing
procedures.
Ductwork
Figure 14, p. 20
to
Figure 19, p. 21
illustrate the supply and
return air openings as viewed form the rear of the unit.
Smoke Detector, Return
7
7
7
7
Through-the-Base Electrical
8
13
8
13
Unit Mounted Circuit Breaker
5
5
5
5
Unit Mounted Disconnect
5
5
5
5
(a) Weights for options not listed are <5 lbs.
(b) Net weight should be added to unit weight when ordering factory-installed accessories.
(c) Applicable to Heat Pump units only.
Table 2.
Factory installed options (fiops)/accessory net weights (lbs)
(a),(b)
WSC036E-048E
WSC060E
WSC072E-090E
WSC120E
Net Weight
Net Weight
Net Weight
Net Weight
Accessory
3-4 Ton
5 Ton
6-7½ Ton
10 Ton
WARNING
Risk of Roof Collapsing!
Confirm with a structural engineer that the roof
structure is strong enough to support the combined
weight of the roof curb and the unit. Refer to
Table 1,
p. 19
for typical unit and curb weights. Failure to ensure
proper structural roof support could cause the roof to
collapse, which could result in death or serious injury
and property damage.
Figure 14.
Heat pump - 3-4 ton standard efficiency -
horizontal airflow supply/return
Note:
All dimensions are in inches/millimeters.
Figure 15.
Heat pumps - 5-7½ ton - horizontal airflow
supply and return
Note:
All dimensions are in inches/millimeters.
Supply
Return
