Procom PCNSD18T - Page 16

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200239-01C16
INSTALLATION
Figure 15 - Gas Connection
Figure 14 - Attaching Flexible Gas Hose
to Heater Gas Regulator
* Purchase the optional CSA design-certied equipment
shuto󰀨 valve from your dealer.
Typical Inlet Pipe Diameters
Use 1/2" black iron pipe or greater. Installa-
tion must include an equipment shuto󰀨 valve,
union, and plugged 1/8" NPT tap. Locate
NPT tap within reach for test gauge hook up.
NPT tap must be upstream from heater (see
Figure 15).
IMPORTANT: Install an equipment shuto
valve in an accessible location. The equip-
ment shuto valve is for turning on or shutting
o the gas to the appliance.
For propane installations, 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.
The installer must supply an external regula-
tor. The external regulator will reduce incom-
ing gas pressure. You must reduce incoming
gas pressure to between 11" WC and 14" WC.
If you do not reduce incoming gas pressure,
heater regulator damage could occur. Install
external regulator with the vent pointing down
as shown in Figure 16. Pointing the vent down
protects it from freezing rain or sleet.
Figure 16 - External Regulator
with Vent Pointing Down
External
Regulator with
Vent Pointing
Down
Propane
Supply Tank
Equipment
Shuto󰀨 Valve
Ground
Joint Union
3/8" NPT
Pipe Nipple
Flexible Gas Hose (if
allowed by local codes)
Fitting
Heater Gas
Regulator
Tee Joint
Reducer
Bushing to
1/8" NPT
1/8" NPT
Plug Tap
Test Gauge
Connection*
Sediment
Trap
Tee Joint
Pipe Nipple
Gap
3" Minimum
Install sediment trap in supply line as shown
in Figure 15. Place sediment trap where it is
within reach for cleaning. Place sediment trap
where trapped matter is not likely to freeze.
A sediment trap traps moisture and contami-
nants. This keeps them from going into heater
controls. If sediment trap is not installed or is
installed wrong, heater may not run properly.
WARNING: Test all gas piping
and connections for leaks after
installing or servicing. Correct
all leaks at once (see page 17).
Natural Gas
From Gas Meter
(5" W.C.** to
9.5" W.C.
Pressure)
Propane
From External
Regulator
(11" W.C.**
to 14" W.C.
Pressure)