Desa R series Owner's Manual page 15

INSTALLATION
Continued
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 Figures 16 or 17 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
(Variable Manually-Controlled
and Thermostatically-Controlled
Models 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).
Natural
From Gas Meter
(5" W.C.** to
10.5" W.C.
Pressure)
Propane/LP
From External
Regulator
(11" W.C.**
to 14 " W.C.
Tee Cap Pipe
Pressure
Joint
Sediment Trap
Figure 16 - Gas Connection
(Variable Manually-Controlled and
Thermostatically-Controlled Models Only)
110882-01K
CSA Design-Certified
Equipment Shutoff Valve
With 1/8" NPT Tap*
Gas
Regulator
3" Min.
Approved
Flexible
Gas Hose (if
allowed by
Nipple
local codes)
www.desatech.com
CSA Design-Certified
Equipment Shutoff Valve
With 1/8" NPT Tap*
Approved
Flexible
Gas Hose (if
allowed by
local codes)
3" Minimum
Cap Pipe
Gas Control
Sediment Trap
Figure 17 - Gas Connection (Remote-
Ready Models Only)
* Purchase the optional CSA design-certified
equipment shutoff valve from your dealer. See
Accessories, page 42.
**Minimum inlet pressure for purpose of input
adjustment.
CHECkING GAS CONNECTIONS
WARNING: Test all gas piping
and connections, internal and
external to unit, for leaks after
installing or servicing. Correct
all leaks at once.
WARNING: Never use an
open flame to check for a leak.
Apply a noncorrosive leak detec-
tion fluid to all joints. Bubbles
forming show a leak. Correct all
leaks at once.
CAUTION: Make sure exter-
nal regulator has been installed
between propane/LP supply
and heater. See guidelines un-
der Connecting to Gas Supply,
page 14.
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.
Tee
Pressure)
Nipple Joint
15