Desa VN10 User Manual download pdf (Page 8)

101851

NATURAL GAS HEATER

VANGUARD VN6C AND VN10

IMPORTANT:

Hold pressure regulator with wrench when connecting it to gas piping and/

or fittings.

Figure 12 - Gas Connection

* An A.G.A. design-certified manual shutoff valve with 1/8" NPT tap is an acceptable

alternative to test gauge connection. Purchase the optional A.G.A. design-certified manual

shutoff valve from your dealer. See Accessory, page 15.

Tee Joint

Reducer

Bushing to

1/8" NPT

Plug Tap

Test

Gauge

Connection *

Pressure

Regulator

Tee

Joint

Pipe

Nipple

Cap

Manual

Shutoff

Valve *

Ground Joint

Union

Heater

Cabinet

Sediment

Trap

3" Minimum

3/8" NPT

Pipe Nipple

From

Gas Meter

(4" W.C. to

10.5" W.C.

Pressure)

CONNECTING TO

GAS SUPPLY

NOTICE: A qualified service per-

son must connect heater to gas

supply. Follow all local codes.

WARNING: Never connect

heater to private (non-utility) gas

wells. This gas is commonly

known as well-head gas.

IMPORTANT:

Check gas line pressure be-

fore 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. Inter-

nally-tinned copper tubing may

be used in certain areas. Check

your local codes. Use pipe 3/8"

diameter or greater to allow

proper gas volume to heater. If

pipe is too small, undue loss of

pressure will occur.

Installation must include a manual shutoff

valve, ground joint 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 12).

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.

Install sediment trap in supply line as shown

in Figure 12. Locate sediment trap where it

is within reach for cleaning. Locate sedi-

ment 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.

CAUTION: Use pipe joint seal-

ant that is resistant to liquid pe-

troleum (LP) gas.

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Desa VN10 User Manual Page 8

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