Dyna-Glo PROFESSIONAL OHIR18LV Operating Instructions And Owner's Manual page 8

GAS FIRED INFRA-RED WORKSHOP HEATER
THERMOPILE
Figure 4. Connection Diagram
Refer to National Electrical Code NFPA70-2017 and for
Canadian installations to current CODE C22.1
2. CONNECTING THE 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 OHIR22NV and OHIR33NV
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 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 OHIR18LV and OHIR30LV 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.
• 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.).
8
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 Natural Gas and Propane Installation
Code, latest edition.
• 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. 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.
3.3 Piping Installation
While ensuring that all of the above gas supply
3/4" MAXIMUM
requirements and piping requirements are
THREAD LENGTH
fulfilled, install piping as follows:
1/2" BLACK PIPE
3/4" (19mm) MAXIMUM
THREAD LENGTH
1/2" BLACK PIPE
GAS VALVE BODY
1/2" MAXIMUM
DEPTH OF IN-
SERTS INTO GAS
VALVE
GAS VALVE BODY
1/2" (12mm) MAXIMUM
DEPTH OF INSERTS
INTO GAS VALVE
Figure 6. Gas Valve Connection Requirements