Connecting to GAS Supply

INSTALLATION

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.

WARNING: Never connect heater to private (non-utility) gas well. This gas is commonly known as well-head gas.

IMPORTANT: Check your gas line pressure before connecting heater to gas line. Gas line pressure must be no greater than 14 inches of water. If gas line pressure is higher, heater regulator damage could occur.

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 large enough diameter to allow proper gas volume to heater. If pipe is too small, undue loss of pressure will occur.

Typical Inlet Pipe Diameters MN300HGA/MN300TGA 1/2” or greater

Installation must include an equipment shutoff valve, union, and plugged 1/8" NPT tap. Locate NPT tap within reach for test gauge hook up. NPT tap must be up stream from heater (see Figure 13).

Figure 13 -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.

IMPORTANT: Install an

equipment

Install sediment trap in supply line

shutoff valve in an accessible

as shown in

Figure 13.

Locate

location. The

equipment

shutoff

sediment trap where it is within

valve

is for

turning on

shutting

reach

for

cleaning.

Locate

off the gas

the appliance.

sediment

trap

where

trapped

Apply pipe joint sealant lightly to

matter is not likely to freeze. A

sediment

trap

traps

moisture and

male threads. This will prevent

contaminants.

This

keeps

them

excess sealant from going into

from going into heater controls. If

pipe. Excess sealant in pipe could

sediment trap is not installed

or is

result

in clogged heater

valves.

installed

wrong,

heater

may

not run properly.

CAUTION: Use

pipe joint

IMPORTANT:

Hold pressure

sealant that is resistant to

natural gas.

regulator

with

wrench

when

connecting it to gas piping and/or

fittings.