GP-MCH9-BX-10A
SCH-90 / IC-90 Manual
R.D: SEPT 2005
RL:10
KH
Page 7
TABLE 1
WARNING
1.
Minimum hose length – Canada fifteen feet (15’) — USA ten feet (10’) Maximum hose length - Fifty
feet (50’) (3/4” inside diameter)
2. LP Gas Cylinder must be located a minimum ten feet away from heater while heater is in operation.
3. After assembly and every time the heater is attached to a new gas cylinder or gas meter, check for leaks
with a soap solution or leak tester on all gas lines and connections. Failure to do so may result in property
damage, bodily injury or death.
DO NOT USE AN OPEN FLAME
.
If high pressure is used to check for leaks, do not subject this heater’s controls to excessive pressure.
MODEL
SIDE
( From Radi-
ant Surface)
TOP
(From Radiant
Surface)
SCH-90 / IC-90-N
SCH-90 / IC-90-L
SCH-90 / IC-90-M-N
SCH-90 / IC-90-M-L
48”
48”
48”
48”
24”
24”
24”
24”
1.3 VENTILATION REQUIREMENTS
It has been determined that CO
2
levels should not exceed 5000 PPM (parts per million) and CO should not ex-
ceed 35 PPM for an eight hour continuous exposure.
Combustion of gas fuel requires air. Each SCH-90 heater requires 90 sq.in. of opening for combustion air. (ex.:
9” x 10” window opening)
To maintain the carbon dioxide content in the air at or below the concentration mentioned above, the number of air
changes are listed below depending on the size of the space being heated:
1.4 CLEARANCES TO COMBUSTIBLES
TABLE 2
Room Volume cu.ft.
No. of air changes /
5000
5
7,500
3
10,000
2.5
15,000
1.5
20,000
1.25
25,000
1
50,000
.5
Required room air changes per hour
1.2 GAS SUPPLY & PRESSURE INFORMATION
All piping and hose must be installed according to local code, and must be of adequate size and construction.
Natural gas models must have the supply line limited to 14 inches (maximum) water column.
If the line pressure will go above 14 inches water column at any time, a separate regulator must be used. The
minimum supply line pressure at the inlet to the heater regulator must in no case be lower than 6.3 inches of water
column.
Note:
The regulator is an internal component of the heater and maintains the heater’s manifold pressure; natural
gas is 5.5 inches water column, and LP gas is 10.5 inches water column.
Heaters equipped for LP gas operations must have a minimum supply line pressure 11.3 inches of water column
at the heater. Maximum line pressure is 1/2 PSI (14 inches water column).
