Installation
RT-SVX22J-EN
21
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. 20
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. Refer to
Table 1, p. 20
for the unit operating
weights. 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 16, p. 21
to
Figure 18, p. 22
illustrate the supply and
return air openings as viewed from the rear of the unit.
Economizer
26
36
36
36
36
Electric Heaters
15
30
30
40
40
Hinged Doors
10
12
12
12
12
Manual Outside Air Damper
16
26
26
26
26
Motorized Outside Air Damper
20
30
30
30
30
Novar Control
8
8
8
8
8
Oversized Motor
5
8
8
—
—
Powered Convenience Outlet
38
38
38
38
50
Powered Exhaust
40
40
80
80
80
Reheat Coil
15
25
—
—
53
Roof Curb
61
78
78
78
89
Smoke Detector, Supply
5
5
5
5
5
Smoke Detector, Return
7
7
7
7
7
Stainless Steel Heat Exchanger
4
6
6
6
6
Through the Base Electrical
8
13
13
13
13
Unit Mounted Circuit Breaker
5
5
5
5
5
Unit Mounted Disconnect
5
5
5
5
5
460V IDM
(c)
29
29
-
-
-
(a) Weights for options not listed are <5 lbs.
(b) Net weight should be added to unit weight when ordering factory-installed accessories.
(c) Apply weight with all 460V 17 SEER Two-Stage Cooling units.
Table 2.
Factory installed options (fiops)/accessory net weights (lbs)
(a),(b)
(continued)
Figure 16.
3-5 ton standard efficiency units & 3 ton high
efficiency units - Horizontal supply & return
air openings
Summary of Contents for Precedent THC036E
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