Installation
RT-SVX23G-EN
21
Figure 17, p. 21
to
Figure 19, p. 21
illustrate the supply and
return air openings in a downflow configuration.
Elbows with turning vanes or splitters are recommended
to minimize air noise due to turbulence and to reduce static
pressure.
When attaching the ductwork to the unit, provide a water-
tight flexible connector at the unit to prevent operating
sounds from transmitting through the ductwork.
All outdoor ductwork between the unit and the structure
should be weather proofed after installation is completed.
Roof Curb
The roof curbs for these units consists of a "full perimeter"
enclosure to support the unit just inside of the unit base
rail.The 7½ - 10 ton high efficiency units contain a support
base alignment rail and will extend past the end of the roof
curb as shown in figures below.
Before installing any roof curb, verify;
•
It is the correct curb for the unit,
•
The necessary gaskets and hardware are included,
•
The purposed installation location provides the
required clearance for proper operation.
•
Insure that the curb is level and square.The top surface
of the curb must be true to assure an adequate curb-to-
unit seal.
Figure 16.
Heat pump - 10 ton standard efficiency -
horizontal airflow supply/return
Note:
All dimensions are in inches/millimeters.
Figure 17.
Heat pump - 3-4 ton standard efficiency -
downflow airflow supply/return - through-
the-base utilities
Note:
All dimensions are in inches/millimeters.
3 7/8”
98 MM
9 3/8”
238 MM
19 1/4”
489 MM
16 3/4”
425 MM
4 3/4”
120 MM
32 1/4”
832 MM
27 5/8”
701 MM
Supply
Return
4 1/4”
108 MM
3/4-14 NPT DIA. HOLE
CONDENSATE DRAIN
32 1/4”
832 MM
THROUGH
THE BASE
ELECTRICAL
SUPPLY
RETURN
TBU CONDENSATE
3 5/8”
92 MM
14”
356 MM
9 1/4”
235 MM
15 1/2”
394 MM
4”
102 MM
24”
610 MM
16”
406 MM
4 3/16”
106 MM
23 1/2”
597 MM
2 13/16”
71 MM
6 1/2”
165 MM
3 11/16”
94 MM
4 7/8”
124 MM
5 1/16”
128 MM
9 15/16”
253 MM
Figure 18.
Heat pumps - 5-7½ ton - downflow airflow
supply/return - through-the-base utilities
Note:
All dimensions are in inches/millimeters.
Figure 19.
Heat pump - 10 ton standard efficiency -
downflow airflow supply/return through-
the-base utilities
Note:
All dimensions are in inches/millimeters.
Supply
Return
32 1/8”
816 MM
33”
838 MM
4”
102 MM
17 1/2”
444 MM
17 1/2”
444 MM
3 5/8”
92 MM
9 7/8”
251 MM
4 1/8”
104 MM
27 5/8”
701 MM
THROUGH THE
BASE CONDENSATE
THROUGH THE
BASE ELECTRICAL
42 3/16”
1072 MM
5 7/8”
149 MM
6 3/8”
163 MM
2 3/4”
71 MM
