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104133
NATURAL GAS CONSTRUCTION HEATER
MODEL TC250RNG
1. Provide natural gas supply system.
2. Install plumbing from natural gas sup-
ply system to heater. Provide 4 psi gas
pressure to heater. If gas supply pres-
sure is over 4 psi, use high pressure
regulator (provided).
3. Connect gas supply to heater using
minimum 3/8" i.d. hose. Maximum
hose length is 10 feet.
4. Connect hose or plumbing to 1/2" SAE
flare fitting at the valve inlet. Tighten
all fittings with a wrench.
5. Open natural gas supply valve slowly.
Check all connections for leaks. Never
use an open flame to check for a leak.
Apply mixture of liquid soap and wa-
ter to gas joints. Bubbles forming show
a leak that must be corrected. Correct
all leaks at once.
6. Close natural gas supply valve.
Figure 2 - Installing Regulator
Screws
Copper Fuel Tube
WARNING: Test all gas pip-
ing and connections for leaks
after installation or servicing.
Never use an open flame to check
for a leak. Apply a mixture of
liquid soap and water to all joints.
Bubbles forming show a leak.
Correct all leaks at once.
INSTALLATION
WARNING: Review and un-
derstand the warnings in the
Safety Information Section, page
2. They are needed to safely op-
erate this heater. Follow all local
codes when using this heater.
gas at 4 psi pressure for each heater
connected to the system.
2. Mount regulator to heater base below
piezo ignitor button (see Figure 2). Use
1/4-20 screws from hardware bag to at-
tach regulator to heater. Mount regula-
tor so the outlet with male connector
points toward the heater inlet .
3. Attach the 1/2" copper fuel tube (sup-
plied) to male connector on regulator.
Attach other end of fuel tube to heater
inlet. Firmly tighten fuel tube flare nuts
onto each fitting.
4. Open natural gas supply valve slowly.
Check all connections for leaks. Never
use an open flame to check for a leak.
Apply mixture of liquid soap and wa-
ter to gas joints. Bubbles forming show
a leak that must be corrected. Correct
all leaks at once.
5. Close natural gas supply valve.
6. Follow steps under To Start Heater in
the OPERATION section (page 5) of
this manual.
Installing High Pressure
Regulator
If the inlet supply pressure is above 4 psi,
you must use the high pressure regulator
(supplied). Follow the instructions below to
install regulator.
1. Install pipe or flexible connector (not
supplied) from gas supply to high pres-
sure regulator. Pipe or flexible connec-
tor must be a minimum of 3/8" i.d. with
a maximum lenth of 10 feet. Attach pipe
or flexible connector to inlet of regula-
tor. The female threads of the regulator
are 1/2 npt.
Note:
The natural gas sup-
ply must deliver 250 CFH of natural
Regulator