Connecting To Gas Supply - Vanguard VN1800C Owner's Operation And Installation Manual

CONNECTING
TO GAS
SUPPLY
14
A qualified service person must connect heater to gas supply.
Follow all local codes.
Never connect heater to private (non-utility) gas wells. This gas is
commonly known as well-head 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.
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.
VN1800C or VN1800IT 3/8" or greater
VN3000C or VN2550IT 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 13, 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.
Use pipe joint sealant that is resistant to liquid petroleum (LP) gas.
Install sediment trap in supply line as shown in Figure 13, 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.
NOTICE
WARNING
WARNING ICON G 001
CAUTION
WARNING ICON G 001
Typical Pipe Diameters
CAUTION
WARNING ICON G 001
100750