Desa CGN18RA User Manual download pdf (Page 14)

101826

CONNECTING

TO GAS

SUPPLY

NOTICE

A qualified service person must connect heater to gas supply.

Follow all local codes.

Install sediment trap in supply line as shown in Figure 12, page 15. Locate sediment

trap where it is within reach for cleaning. 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 wrong, heater may not run properly.

Typical Pipe Diameter

CGN18RA 3/8" or greater

CGN30D 1/2" or greater

Installation must include a manual shutoff 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 12, page 15).

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.

WARNING ICON G 001

CAUTION

Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.

IMPORTANT

: Check 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.

WARNING ICON G 001

WARNING

Never connect heater to private (non-utility) gas wells. This gas is

commonly known as wellhead gas.

WARNING ICON G 001

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.

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Desa CGN18RA User Manual Page 14