www.desatech.com
110361-01E
10
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 7. 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.
INSTALLATION
Continued
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)
CSA Design-
Certified Equipment
Shutoff Valve With
1/8" NPT Tap*
Figure 7 - Gas Connection
* Purchase the optional CSA design-certified
equipment shutoff valve from your dealer. See
Accessories, page 26.
** Minimum inlet pressure for purpose of input
adjustment.
Tee
Joint
Pipe
Nipple
Cap
3"
Min
Sediment Trap
Gas
Regulator
of Heater
Approved
Flexible Gas
Hose (if allowed
by local codes)
CHECKING GAS CONNECTIONS
WARNING: Test all gas pip-
ing and connections, internal
and external or unit, for leaks
after installing or servicing. Cor-
rect all leaks at once.
WARNING: Never use an
open flame to check for a leak.
Apply a noncorrosive leak de-
tection 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 under
Connecting to Gas Supply,
pages 9 and 10.
Pressure Testing Gas Supply Piping
System
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1.
Disconnect heater with its appliance main gas
valve (control valve) and equipment shutoff
valve from gas supply piping system. Pres-
sures in excess of 1/2 psig will damage heater
regulator.
2.
Cap off open end of gas pipe where equip-
ment shutoff valve was connected.
3.
Pressurize supply piping system by either
opening propane/LP supply tank valve for
propane/LP gas, opening main gas valve lo-
cated on or near gas meter for natural gas, or
using compressed air.
4.
Check all joints of gas supply piping system.
Apply noncorrosive leak detection fluid to gas
joints. Bubbles forming show a leak.
5.
Correct all leaks at once.
6.
Reconnect heater and equipment shutoff
valve to gas supply. Check reconnected fit-
tings for leaks.
Test Pressures Equal To or Less Than 1/2 PSIG
(3.5 kPa)
1.
Close equipment shutoff valve (see Figure 8,
page 11).