Desa Vanguard GVR35PA Owner's Operation And Installation Manual page 12

INSTALLING
HEATER
Continued
12
Installation must include a manual shutoff valve, ground joint union, plugged 1/8"
NPT tap and a sediment trap. Locate NPT tap within reach for test gauge hook up.
NPT tap must be upstream from heater (see Figure 7).
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 petro-
leum (LP) gas.
Install sediment trap in supply line as shown in Figure 7. 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.
IMPORTANT: Use two pipe wrenches when connecting gas piping to gas control
valve of heater. This will prevent turning or damaging control valve.
Control
Valve
Ground
Joint
Union
Reducer
Bushing to
1/8" NPT
Test
1/8" NPT
Gauge
Plug Tap
Connection*
Tee Joint
* 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 37.
** For purposes of input adjustment.
CAUTION
WARNING ICON G 001
Tee Joint
Pipe
Sediment
Nipple
Trap
Cap
Figure 7 - Gas Connection
Acceptable
construction
of inlet gas
line
From External
Regulator (11"
W.C. Min** to
Manual
14" W.C. Max)
Shutoff
Valve *
Preferred
construction
of inlet gas
line
From
External
Regulator
(11" W.C.
Min** to
14" W.C.
Max)
100791