Armstrong World Industries HWC PREMIER 183 - Manual (Page 117)

6-10
INSTALLATION Magic-Pak: HW/HWC
SRM-HW/HWC 8/99
Low NO Insert
x
FIGURE 6-4 NO
x
Insert Removal
Never use a flame to check for gas leaks. Explosion
causing injury or death may occur.
WARNING
Units for operation with propane must be converted with a kit supplied by
the manufacturer and require for operation an inlet pressure of 11" W.C.
minimum and 14" W.C. maximum. A regulator is also required on the
propane tank.
When converting a low NO
x
unit (designated by an L in the model num-
ber) to propane, the NO
x
inserts must be removed . After removing
the burners, remove the screw holding each insert and pull the insert from
the combustion chamber (see Figure 6-4). The screws
must be rein-
stalled in the vest panel after the inserts are removed.
The furnace must be isolated from the gas supply
piping system by closing the individual manual shutoff
valve during any pressure testing of gas supply piping
system at test pressures equal to or less than 1/2 psig
or 14" W.C. If the piping system is to be tested at
pressures in excess of 1/2 psig, the furnace and its
individual shutoff valve must be disconnected from the
gas supply piping system. The gas valve supplied with
this furnace is rated at 1/2 psig. Any higher pressure
may rupture the pressure regulator diaphragm which
will cause over firing of the burners and improper
burner operation. This action may produce a high
concentration of carbon monoxide which can result in
asphyxiation.
WARNING