Desa INTERNATIONAL UNVENTED (VENT-FREE) GAS LOG HEATER Owner's Operation And Installation Manual page 13

INSTALLATION
Continued
Installation must include an 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 14 or
15, depending on your model).
IMPORTANT: Install equipment shutoff valve in an accessible
location. The equipment shutoff valve is for turning on or shutting
off the gas to the appliance.
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 a sediment trap in supply line as shown
in Figure 14 or 15, depending on your model. 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.
CAUTION: Avoid damage to regulator. Hold gas
regulator with wrench when connecting it to gas
piping and/or fittings (Thermostat-Controlled Mod-
els Only).
CAUTION: Avoid damage to gas control. Hold gas
control with wrench when connecting it to gas piping
and/or fittings (Remote-Ready Models Only).
Propane/LP
Supply Tank
Figure 13 - External Regulator With Vent Pointing Down
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For more information, visit www.desatech.com
108114
External Regulator
Vent Pointing Down
Connecting To Gas Supply (Cont.)
CSA Design-Certified Equipment
Shutoff Valve With 1/8" NPT Tap*
PROPANE/LP -
From External
Regulator
(11" W.C.**
to 14" W.C.
Pressure)
NATURAL -
From Gas
3" Minimum
Meter
(5" W.C.**
to 10.5" W.C.
Pressure)
Tee Cap
Joint
Sediment Trap
Figure 14 - Gas Connection (Thermostat-Controlled Models
Only)
PROPANE/LP -
From External
Regulator
(11" W.C.**
to 14" W.C.
Pressure)
NATURAL -
From Gas
Meter
(5" W.C.**
to 10.5" W.C.
Pressure)
Tee Pipe
Joint Nipple Cap
Sediment Trap
Figure 15 - Gas Connection (Remote-Ready Models Only)
* Purchase the optional CSA design-certified equipment shutoff valve
from your dealer. See Accessories, page 38.
**Minimum inlet pressure for purpose of input adjustment.
INSTALLATION
Approved Flexible
Gas Hose (if allowed
by local codes)
Gas Regulator
Pipe
Nipple
CSA Design-Certified Equipment
Shutoff Valve With 1/8" NPT Tap*
Approved Flexible
Gas Hose (if allowed
by local codes)
3" Minimum
Gas Control
Valve
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