Gas Supply Requirements - Mr. Heater MH25NG Mode D'emploi

CAUTION:
Never connect powerpile gas
valve or thermostat to line voltage
or a transformer
Thermostat Wires
POWERPILE GAS VALVE
Figure 4. Connection Diagram
Refer to National Electrical Code NFPA70-1993 and for
Canadian installations to current CODE C22.1-L
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

•
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.
WARNING: Model MH/25NG 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.
•
Most residential 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 MH25LP 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.
Mr. Heater / Infrared Workshop Heater
MAXIMUM
WIRE LENGTH
SIZES 2 WIRE
CABLE
NO. 18 15 FEET
NO. 16 30 FEET
NO. 14 50 FEET
POWERPILE GENERATOR
Factory Wired
• 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.P.).
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.
USE MODERATE AMOUNT OF PIPE DOPE
LEAVE 2 THREADS BARE
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.
3/4" MAXIMUM
THREAD LENGTH
1/2" BLACK PIPE
GAS VALVE BODY
1/2" MAXIMUM
DEPTH OF IN-
SERTS INTO GAS
Figure 6. Gas Valve Connection Requirements
Installation instructions and Owner's Manual
E8
VALVE