22
Installation (Continued)
Table 3-3
Typical Unit & Curb Weights
Typical Unit Operating Weight (1) Roof Curb
Unit SE,SL,
Max. Weight (3)
Size SAH
SSH
SFH
SXH
SEHG SFH
SXH
SAH
S*HF/G
C20
4360 4690 4970 4580 490 510
C25
4520 4860 5130 4750 490 510
C30
5220 5590 5840 5460 490 510
C40
6890 7400 7880 7240 515 550
C50
7890 8450 8900 8290 515 550
C55
8140 8690 9170 8540 515 550
C60
9320 9650 10120 9480 610 640
C70
9860 10160 10640 10040 610 640
C75
9860 10160 10640 10040 610 640
C90
14730 15400 14580 770
D11
15310 15940 15160 770
D12
15730 16370 15560 770
D13
16080 16710 15930 770
Typical Unit Operating Weight (2) Roof Curb
Unit SE,SL, Max. Weight (3)
Size SAH
SSH
SFH
SXH
SEHG SFH
SXH
SAH
S*HF/G
C20
4650 5000 5270 4860 490 510
C25
4830 5180 5440 5060 490 510
C30
5570 5930 6200 5800 490 510
C40
7290 7820 8280 7650 515 550
C50
8350 8900 9380 8740 515 550
C55
8600 9160 9640 9010 515 550
C60
9840 10150 10620 10010 610 640
C70
10370 10690 11160 10560 610 640
C75
10370 10690 11160 10560 610 640
C90
15460 16050 15240 770
D11
15950 16590 15810 770
D12
16380 17010 16220 770
D13
16730 17380 16580 770
Note:
1. The weights shown in this table represents the typical unit operating weights for the
heating/cooling function indicated with an economizer and exhaust fan installed.
2. The weights shown represents the typical unit operating weights for the
heating/cooling function indicated with an economizer, exhaust fan with supply &
exhaust VFD installed.
3. Roof curb weights include the curb and pedestal.
Roof Curb and Ductwork
The roof curbs for 20 through 130 Ton units consists of two
main components; a pedestal to support the unit’s con-
denser section and a "full perimeter" enclosure to support
the unit’s air handler section.
Before installing any roof curb, verify;
1. That it is the correct curb for the unit,
2. That it includes the necessary gaskets and
hardware,
3. That the purposed installation location provides
the required clearance for proper operation.
4. 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.
Step-by-step curb assembly and installation instructions
ship with each Trane accessory roof curb kit. Follow the in-
structions carefully to assure proper fit-up when the unit is
set into place.
Note: To assure proper condensate flow during
operation, the unit (and curb) must be as level as
possible. The maximum slope allowable for rooftop
unit applications,
excluding SSH_'s, is 4" end-to-
end and 2" side-to-side. Units with steam coils
(SSH_'s) must be set level!
If the unit is elevated, a field constructed catwalk around the
unit is strongly recommended to provide easy access for
unit maintenance and service.
Recommendations for installing the Supply Air and Return
Air ductwork joining the roof curb are included in the curb
instruction booklet. Curb ductwork must be fabricated and
installed by the installing contractor before the unit is set
into place.
Note: For sound consideration, cut only the holes
in the roof deck for the ductwork penetrations. Do
not cut out the entire roof deck within the curb
perimeter.
