Specifications

6 IM 685-2
Gas Piping Routing Into Unit
On-The-Roof Piping (Models 020-140)
1. Remove knockout (1) at corner of burner vestibule door
and saw out corner of door. See Figure 3b. Make saw cuts
(2) tangent to round hole and square with door edges.
2. Install pipe corner plate (3) on vestibule, locating on pre-
punched holes. See Figure 3c. This part is shipped inside
the vestibule.
3. Route gas supply pipe through hole. Carefully plan pipe
route and fitting locations to avoid interference with
swinging of doors, etc.
Through-The-Curb Piping (Models 020-140)
1. Remove bottom access panel (5). See Figure 3c.
2. Remove knockout (4) and make an opening (6) through
bottom deck directly below knockout hole.
3. Route gas pipeline through these openings and seal them
off with suitable grommets (7).
See Figure 3a Section A-A.
4. Replace bottom access panel (5).
Typical Piping Connections
Figure 4. Connections
A = Shutoff Cock (ball valve)
B = Union - Furnished.
C = Gas Pipe - Routed in through front
D = Gas Pipe - Routed in through curb
E = Factory Piped Gas Trains
2
1
7
7
4
6
A
A
See Figure 3c
Gas Supply
Section A-A
3
4
5
2
Figure 3a. Pipe Routing
Figure 3c.Pipe Corner Plate
C
C
D
B
A
D
A
FSG
E
With Shutoff Cock
Folded Back
With Shutoff Cock
In Front
Figure 4b. Figure 4a.
Figure 3b. Knockout