Procom ML150HPA, ML150TPA Installation, Connecting To Gas Supply, GasConnection, CAUTION Use

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 heat er direct ly to t he 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 pressure . You must reduce 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 down as shown in Figure 13. Pointing the vent down protects it from freezing rain or sleet.

Figure 13 - External Regulator with Vent Pointing Down

WARING:Do not over tighten gas connections.

INSTALLATION

r

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.

CAUTION: Use only new, black

Apply

pipe joint

sealant lightly to

male

threads.

This

will

prevent

iron or steel

pipe. Internally-tinned

excess sealant

from

going

into

copper tubing

may

be

used in

pipe. Excess sealant

in

pipe

could

certain areas. Check your local

result

in clogged

heater

valves.

codes. Use pipe of large

enough

diameter to allow proper gas volume

CAUTION: Use

pipe

joint

to heater. If

pipe is too

small,

sealant

that

is resistant

to

undue loss of pressure will occur.

liquid

petroleum (LP)

gas.

Typical Inlet Pipe Diameters

Install 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,

use 1/2” or greater pipe.

reach

for

cleaning.

Locate

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 14).

installed

wrong,

heater

may

IMPORTANT: Install

an

equipment

not run properly.

shutoff valve in an accessible

IMPORTANT:

Hold

pressure

location. The

equipment

shutoff

regulator

with

wrench

when

valve

is for

turning

on

or

shutting

connecting it to gas piping and/or

off the

gas

to

the appliance.

fittings.

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