Install and Operating Manual

Mighty Therm2
Page 13
galvanized pipe and elbows to allow the open end to face
down aside the boiler. This is available as a Commercial
Kit from the manufacturer.
Part numbers for the low prole terminals to cover the
vent and combustion air openings are shown in Table 6.
SECTION 3.
Gas Supply and Piping
3.1 Gas Supply and Piping
Gas piping should be supported by suitable hangers
or oor stands, not by the appliance.
Mighty Therm2’s gas train allows the user to pipe
the gas from either the right side or the left side of the
unit. As shipped, the right side of the gas train is capped
off, and there is a manual valve on the left side. If
desired, the manual valve on the left side of the gas train
may be moved to the right side, and the cap on the right
side may be moved to the left.
Review the following instructions before
proceeding with the installation.
1. Verify that the appliance is tted for the proper type
of gas by checking the rating plate. Mighty Therm2
appliances are equipped to operate at elevations up
to 10,000 feet (3050m). Mighty Therm2 appliances
may be adjusted to operate properly at altitudes
above 2500 feet (see Section 6.6.2) and the input
will be reduced if the heating value of the gas
supply is below sea level values.
2. The maximum inlet gas pressure must not exceed
13" W.C (3.2kPa). The minimum inlet gas pressure
is 5" W.C. (1.2kPa).
3. Refer to Table 7, size supply.
4. Run gas supply line in accordance with all
applicable codes.
5. Locate and install manual shutoff valves in
accordance with state and local requirements.
6. A sediment trap must be provided upstream of the
gas controls.
7. All threaded joints should be coated with piping
compound resistant to action of liqueed petroleum
gas.
8. The appliance and its individual shutoff valve must
be disconnected from the gas supply piping during
any pressure testing of that system at test pressures
in excess of 1/2 PSIG (3.45kpa).
9. The unit must be isolated from the gas supply
system by closing its individual manual shutoff
valve during any pressure testing of the gas supply
piping system at test pressures equal to or less than
1/2 PSIG (3.45kpa).
10. The appliance and its gas connection must be leak
tested before placing it in operation.
11. Purge all air from gas lines.
WARNING



NOTE

maximum capacity to properly measure the inlet supply


be an indication of an undersized gas meter, undersized

Unit
20°F 25°F 30°F 35°F
         
gpm feet gpm feet gpm feet gpm feet
         
         
         
         
         
         
         

Unit
   
         
lpm m lpm m lpm m lpm m
         
         
         
         
         
         
         





Figure 5. Typical Gas Train Conguration.