CONNECTING TO GAS SUPPLY

WARNING: A qualified service person must connect heater to gas supply. Follow all local codes.

WARNING: This appliance requires a 3/8" NPT (National Pipe Thread) inlet connection to the pressure regulator.

CAUTION: Never connect

h e a t e r d i r e c t l y t o t h e propane/LP supply. This heater requires an external regulator (not supplied) . Install the external regulator between the heater and propane/LP supply.

The installer must supply an external regulator. The external regulator will reduce incoming gas p r e s s u r e . Yo u m u s t r e d u c e incoming gas pressure to between 11 and 14 inches of water. If you do not reduce incoming gas pressure, heater regulator damage could occur . Install external regulator with the vent pointing

INSTALLATION

From External

LP Gas Regulator

Figure 14 -Gas Connection

*A CSA/AGA design-certified equipment shutoff valve with 1/8" NPT tap is an acceptable alternative to test gauge connection. Purchase the optional CSA/AGA design - certified equipment shutoff valve from your dealer. See Accessories, page 17.

down as shown in Figure 13. Pointing the vent down protects it from freezing rain or sleet.

CAUTION: Use only new, b l a c k i r o n o r s t e e l p i p e . Internally-tinned copper tubing may be used in certain areas. Check your local codes. Use pipe of large enough diameter to allow proper gas volume to heater. If pipe is too small, undue loss of pressure will occur.

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 liquid petroleum (LP) gas.

Figure 13 - External Regulator with Vent Pointing Down

Typical Inlet Pipe DiametersInstall sediment trap in supply line All models up to 20,000 BTU’s use as shown in Figure 14. Locate

3/8’’ or greater pipe;

 

 

sediment trap where it is within

All models 25,000 BTU’s and higher,

reach

for

cleaning .

Locate

use 1/2” or greater pipe.

 

sediment

trap

where

trapped

Installation

must

include an

matter is not likely to freeze. A

equipment

shutoff

valve,

union,

sediment

trap

traps

moisture

and

and plugged 1/8" NPT tap. Locate

contaminants.

This

keeps

them

NPT tap within reach for test gauge

from going into heater controls. If

hook up. NPT tap must be

sediment trap is not installed or is

upstream from heater (see Figure

installed

wrong,

heater

may

14).

 

 

 

 

 

 

not run properly.

 

 

 

 

IMPORTANT: Install

an equipment

 

 

 

 

IMPORTANT:

 

Hold

pressure

shutoff valve in an accessible

 

regulator with

wrench when

location. The equipment

shutoff

connecting it to gas piping and/or

 

 

 

 

valve is for turning on or shutting fittings. off the gas to the appliance.

9

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Procom ML200TBA, ML300HBA, ML300TBA, ML200HBA installation manual Connecting to GAS Supply, Important Install

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