Procom RD-C Instruction Manual page 9

INSTALLATION
Continued
CAUTION:
Use only new black iron or steel pipe.
Internally tinned copper tubing may be used in certain areas.
Check your local codes. Use pipe of ½ inch diameter or greater to
allow proper volume gas to heater. If pipe is too small, loss of
pressure will occur. Installation must include an equipment shutoff
valve, union, and plugged 1/8-inch NPT tap. Locate NPT tap
within reach for test gauge hook up. NPT tap must be upstream
from heater (see Figure 6).
*Purchase the optional CSA design-certified equipment shut off valve
from your dealer. See Accessories
**Minimum inlet pressure for purpose of input adjustment.
IMPORTANT:
Install equipment shutoff valve in an accessible location. The equipment shutoff valve is for turning on
or shutting off the gas to the appliance. Apply pipe joint sealant lightly to male threads. This will prevent excess sealant
from going into pipe. Excess sealant in pipe could result in clogged heater valves.
CAUTION:
Use pipe joint sealant that is resistant to gas (PROPANE or NG). We recommend that you install a
sediment trap in a supply line as shown in Figure 6. Locate sediment trap where it is within reach for cleaning. Install in
the piping system between fuel supply and heater. Locate sediment trap where trapped matter is not likely to freeze. A
sediment trap traps moisture and contaminants. This keeps them from going into heater controls. If sediment trap is not
installed or is installed incorrectly, heater may not run properly.
CAUTION:
Avoid damage to regulator. Hold gas regulator with wrench when connecting into gas piping and/or
fittings. NG Models: 5"to 10.5"W.C. Gas supplier provide external regulator for natural gas
CAUTION: Two gas line installation at the same time is forbidden. You are not allowed to open the cover while
the machine is running.
Heater is pre-set at factory for propane gas, no changes are required for connecting to propane. Only a qualified installer
or service technician can perform gas selection and connecting to gas supply.
For changing from propane to natural gas supply:
1. Remove top screw from cover plate, See Figure 7, and rotate to expose gas selection valve.
2. For NATURAL GAS, press knob using a flat screw driver with a blade with thickness of a quarter and turn knob
clockwise until the knob locks into the NG position (see Figure 8). Selection valve must be locked in the NG
position. Do not operate heater between locked positions!
3. Rotate and close cover over gas selection valve and reinstall screw.
4. Remove hex plug (with wrench provided) from natural gas inlet of regulator and install into LP inlet of regulator; use
thread sealant to assure there are no leaks.
For changing from natural gas supply to propane supply:
1. Remove top screw from cover plate, see Figure 7, and rotate to expose gas selection valve.
2. For propane gas, press in knob using a flat screw driver with a blade the thickness of a quarter and turn knob
counterclockwise
LP position. Do not operate heater between locked positions.
3. Rotate and close cover over gas selection valve and reinstall screw.
4. Remove hex plug from liquid propane inlet of regulator and install into NG inlet of regulator; use thread sealant to
assure there are no leaks.
until the knob locks into the LP position, see Figure 9. Selection valve must be locked in the
9
Figure 6 – Gas Connection