Connecting To Gas Supply - Desa VS18NV Owner's Operation And Installation Manual

INSTALLING
Continued
102652

CONNECTING TO GAS SUPPLY

A qualified service person must connect heater to gas supply.
Follow all local codes.
Installation Items Needed
Before installing heater, make sure you have the items listed below.
• piping (check local codes)
• sealant (resistant to LP gas)
• manual shutoff valve *
• test gauge 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 Accessories, page 35.
Never connect heater to private (non-utility) gas wells. This gas is
commonly known as wellhead gas.
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 1/2" 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, 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 14, page 18).
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.
Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.
Install sediment trap in supply line as shown in Figure 14, page 18. 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 contami-
nants. This keeps them from going into heater controls. If sediment trap is not
installed or is installed wrong, heater may not run properly.
NOTICE
• sediment trap
• tee joint
• pipe wrench
WARNING
WARNING ICON G 001
CAUTION
WARNING ICON G 001
CAUTION
WARNING ICON G 001
Continued
17