Desa VN600BA - Manual (Page 11)

www.desatech.com 110720-01J 11
Installation must include equipment 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).
IMPORTANT:
Install an equipment shutoff valve
in an accessible location. The equipment shutoff
valve is for turning on or shutting off the gas to
the appliance.
Check your building codes for any special re-
quirements for locating equipment shutoff valve
to fireplaces.
Apply pipe joint sealant lightly to male NPT
threads. This will prevent excess sealant from
going into pipe. Excess sealant in pipe could result
in clogged heater valves.
WARNING: Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
We recommend that you install sediment trap in
supply line as shown in Figure 13. Locate sediment
trap where it is within reach for cleaning. Install
in piping system between fuel supply and heater.
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:
Hold pressure regulator with
wrench when connecting it to gas piping and/or
fittings. Do not over tighten pipe connection to
regulator. The regulator body could be damaged.
INSTALLATION
Continued
Propane/LP
Supply Tank
Figure 12 - External Regulator With Vent
Pointing Down (propane/LP systems
only)
External
Regulator
Vent
Pointing
Down
Figure 13 - Gas Connection
* A CSA design-certified equipment shutoff valve
with 1/8" NPT tap is an acceptable alternative to
test gauge connection. Purchase the optional CSA
design-certified equipment shutoff valve from your
dealer. See Accessories, page 27.
Tee Joint
Reducer
Bushing to
1/8" NPT
1/8" NPT
Plug Tap
Tee
Joint
Pipe
Nipple
Cap
3/8"
NPT
Pipe
Nipple
Ground
Joint
Union
3"
Min
Natural Gas
From Gas Meter
(4" W.C. to 10.5" W.C.
Pressure [See
Specifications, page 26])
Propane/LP
From External Regulator
(11" W.C. to 14" W.C.
Pressure)
Equipment
Shutoff
Valve*
Test Gauge Connection*
Pressure
Regulator
Heater
Cabinet
Sediment
Trap