Roof Curb; Downflow - Trane Precedent YZC036E Installation, Operation And Maintenance Manual

Figure 41. 3 tons ultra high efficiency - downflow airflow
supply/return - through-the-base utilities
3 5/8"
14" 9 1/4"
15 1/2"
92 MM
356 MM 235 MM
394 MM
4"
102 MM
SUPPLY
18"
457 MM
RETURN
24"
610 MM
TBU CONDENSATE
4 3/16" 4 9/16"
106 MM 116 MM
23 1/2"
597 MM THROUGH
THE BASE GAS
(Y_C Models only)
(a) All dimensions are in inches/millimeters.
Figure 42. 4 to 5 tons ultra high efficiency- downflow
airflow supply/return - through-the-base
(a)
utilities
3 5/8"
92 MM
17 1/2"
9 7/8" 17 1/2"
444 MM
251 MM
444 MM
4"
102 MM
RETURN SUPPLY
32 1/8"
33"
816 MM
838 MM
THROUGH THE
BASE CONDENSATE
4 5/8"
4 1/8"
119 MM
104 MM
27 5/8"
701 MM
THROUGH THE
(a) All dimensions are in inches/millimeters.
Figure 43. Cooling and gas/electric - 6 to 8.5 tons ultra
high efficiency - downflow supply/return
through-the-base utilities
Note: All dimensions are in inches/millimeters.
3 5/8"
92 MM
17 1/2"
9 7/8" 17 1/2"
444 MM
251 MM 444 MM
4"
102 MM
SUPPLY
RETURN
32 1/8"
816 MM
838 MM
THROUGH THE
BASE CONDENSATE
4 1/8"
104 MM
27 5/8"
701 MM
RT-SVX46G-EN
27 9/16"
701 MM
2 13/16"
71 MM
6 1/2"
165 MM
3 11/16"
94 MM
4 7/8"
124 MM
THROUGH
5 1/16"
THE BASE
128 MM
ELECTRICAL
9 15/16"
253 MM
40 3/4"
1035 MM
3 3/4"
95 MM
5"
THROUGH THE 127 MM
BASE ELECTRICAL
5 7/8"
BASE GAS 149 MM
10 7/8"
276 MM
33"
40 3/4"
1035 MM
3 3/4"
95 MM
5"
THROUGH THE 127 MM
BASE ELECTRICAL
5 7/8"
149 MM
10 7/8"
276 MM
Figure 44. Cooling and gas/electric - 10 tons ultra high
(a)
efficiency - downflow airflow supply/return,
through-the-base utilities
Note: All dimensions are in inches/millimeters.
3 5/8" 3 5/8"
92 MM 92 MM
17 1/2" 17 1/2"
444 MM 444 MM
4" 4"
102 MM 102 MM
RETURN RETURN
32 1/8" 32 1/8"
816 MM 816 MM
4 1/8" 4 1/8"
104 MM 104 MM
27 5/8" 27 5/8"
701 MM 701 MM

Roof Curb

Downflow

The roof curbs for these units consists of a "full perimeter"
enclosure to support the unit just inside of the unit base
rail.
Before installing any roof curb, verify:
• It is the correct curb for the unit.
• It includes the necessary gaskets and hardware.
2 3/4"
71 MM 6 1/2"
165 MM • The purposed installation location provides the
required clearance for proper operation.
• The curb is level and square and the top surface of the
curb must be true to assure an adequate curb-to-unit
seal.
Combustible Materials!
Failure to maintain proper clearance between the unit
heat exchanger, vent surfaces and combustible
materials could cause a fire which could result in death
or serious injury or property damage. Refer to unit
nameplate and installation instructions for proper
clearances.
Verify that appropriate materials were used in the
construction of roof and ductwork. Combustible materials
should not be used in the construction of ductwork or roof
curb that is in close proximity to heater elements or any
2 3/4"
71 MM
6 1/2"
hot surface. Any combustible material on the inside of the
165 MM
unit base should be removed and replaced with
appropriate material.
Step-by-step curb assembly and installation instructions
ship with each accessory roof curb kit. Follow the
instructions carefully to assure proper fit-up when the unit
is set into place.
9 7/8" 9 7/8"
251 MM 251 MM
17 1/2" 17 1/2"
444 MM 444 MM
SUPPLY SUPPLY
33" 33"
838 MM 838 MM
THROUGH THE THROUGH THE
BASE ELECTRICAL BASE ELECTRICAL
THROUGH THE THROUGH THE
BASE CONDENSATE BASE CONDENSATE
4 5/8" 4 5/8"
119 MM 119 MM
5 7/8" 5 7/8"
42 3/16" 42 3/16"
149 MM 149 MM
THROUGH THE THROUGH THE 1072 MM 1072 MM
BASE GAS BASE GAS
51 3/16" 51 3/16"
1316 MM 1316 MM
WARNING
Installation
2 3/4" 2 3/4"
71 MM 71 MM
6 3/8" 6 3/8"
163 MM 163 MM
25