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CAUTION:
Never connect powerpile gas
valve or thermostat to line
voltage or a transformer
THERMOSTAT
POWERPILE GENERATOR
THERMOSTAT
WIRES
Figure 4. Connection Diagram
Refer to National Electrical Code - ANSI/NFPA 70 (USA) and for
Canadian installations CSA C22.1 Canadian Electrical Code, Part 1
3. CONNECTING HEATER TO GAS SUPPLY
WARNING: Depending on local codes and
requirements and the installer's skill level, the
sizing and installation of gas lines required to safely
and efficiently supply the heater may require the
assistance of a professional. If in doubt as to these
requirements, discuss the requirements of this
manual with the dealer from whom the heater was
purchased and your gas supplier.
3.1 Gas Supply Requirements
Natural Gas
• See Tables 1 and 2 for gas supply minimum,
maximum, operating, and manifold pressures for
both heater models. Pressures are provided in
inches of W.C. (water column). Also, see heater
rating plates located on the heater.
• Most non-commercial natural gas services provide
a line pressure of 4 oz. (6.9 in. W.C.). If in doubt
consult your natural gas supplier.
• To ensure the best performance from your natural
gas heater make sure the supply manifold pressure
is at least 6" W.C.
WARNING: Model MH25NG is designed to
burn natural gas and it comes equipped with a
regulator. The regulator is built into the gas valve.
The maximum inlet pressure to this regulator is 1/2
psi (14 in. W.C.) If gas line pressure exceeds 1/2
psi, then an additional regulator must be installed
before the heater/regulator to step down the
pressure to a maximum of 1/2 psi.
Propane Gas
• To ensure the best performance from your LP gas
heater, make sure the supply manifold pressure is at
least 1/2 psi (14 in W.C.).
Gas Fired Infrared Workshop Heater
WIRE
MAXIMUM
SIZES
LENGTH 2 WIRE
CABLE
NO. 18
15 FEET
NO. 16
30 FEET
NO. 14
50 FEET
FACTORY
WIRED
POWERPILE
GAS VALVE
WARNING: Model MH22LP is designed to burn
liquefied petroleum (LP) gas and it comes equipped
with a regulator. The regulator is built into the gas
valve. The maximum inlet pressure to this regulator
is 1/2 psi (14 in. W.C.). If gas line pressure exceeds
1/2 psi, then an additional regulator must be
installed before the heater/regulator to step down
the pressure to a maximum of 1/2 psi.
3.2 Piping Requirements
All piping installed must comply with local codes and
ordinances or with National Fuel Gas Code, ANSI
Z223.1 (NFPA 54), whichever takes precedence. When
installing piping, the following requirements must be
taken into consideration: Canadian installations must
comply with the B149.1.2 Gas Code.
• Use new properly reamed black pipe free from
chips.
• Apply a good quality pipe compound to all male
threads as shown in Figure 5 prior to assembly. If
LP gas is the fuel, ensure that pipe compound is
resistant to LP gas. Do not use Teflon™ tape.
Figure 5. Pipe Compound Application
• Male threads on pipe to be installed into gas valve
shall meet the requirements of Figure 6. Threads
longer than those shown in the figure may cause
gas valve distortion and malfunction.
• A sediment trap meeting the typical requirements
of Figure 7 shall be installed in the line to the gas
valve.
• A dedicated shutoff valve for the heater must be
installed in the gas supply line.
Figure 6. Gas Valve Connection Requirements
E8
Operating Instructions and Owner's Manual
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