Specifications
Installation
outSide freSh-air connection:
. Failure to install intake air may
Figure 7: Outside Air Connection.
exhauSt and freSh air intake locationS:
result in improper combustion as well as the unit smoking
during power failures.
The inlet to the intake must be below and a minimum of 12”
(30cm) away from the unit exhaust outlet.
When connecting to an outside fresh air source, do not use
plastic or combustible pipe. A 3” minimum (76 mm) ID
(inside diameter) steel, aluminum or copper pipe or ducting
should be used. The inlet must have a screen installed. It is
recommended, when you are installing a fresh air system, to
keep the number of bends in the pipe to a minimum.
3" ID
(76 mm)
Optional
Elbow
Outside
Wall
15
1
/
2
"
(392mm)
12"
(305mm)
4
7
/
8
"
(126mm)
7
3
/
4
"
(200mm)
9
1
/
4
"
(236mm)
6
3
/
8
"
(162mm)
Figure 8: M-55C-FS Inlet and Outlet Location.
Base of unit to center of flue
15½” (392 mm)
Center of unit to center of flue
6
3
/8” (162 mm)
Base of unit to center of intake
12” (305 mm)
Center of unit to center of intake
4
7
/8” (126 mm)
10