Desa VO36NR Mode D'emploi page 10

INSTALLATION
Continued
We recommend that you install a sediment
trap in supply line as shown in Figure 13. Lo-
cate sediment trap where it is within reach for
cleaning. Install in piping system between fuel
supply and appliance. Locate sediment trap
where trapped matter is not likely to freeze.
A sediment trap traps moisture and contami-
nants. 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
gas control. Hold gas control
with wrench when connecting it
to gas piping and/or fittings.
Approved Flexible
Gas Hose (If
allowed by local
codes)
3" Min.
Pipe Cap Tee
Nipple
Sediment Trap
Figure 13 - Gas Connection
* Purchase the optional CSA design-certified
shutoff valve from your dealer.
** Minimum inlet pressure for purpose of input
adjustment.
CHECKING GAS CONNECTIONS
WARNING: Test all gas piping
and connections 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 detection fluid
to all joints. bubbles forming show
a leak. Correct all leaks at once.
10
CSA Design-Certified
Equipment Shutoff
Valve with 1/8" NPT
Tap*
Natural
From Gas
Meter (5" W.C.**
to 10.5" W.C.
Pressure)
Propane/LP
From External
Regulator (11"
Joint
W.C.** to 14"
W.C. Pressure)
www.desatech.com
CAUTION: Make sure exter-
nal regulator has been installed
between propane/LP supply
and appliance. See guidelines
under Connecting to Gas Sup-
ply, page 8.
PRESSURE TESTING GAS SUPPLY
PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1. Disconnect appliance with its appliance main
gas valve (control valve) and equipment
shutoff valve from gas supply piping system.
Pressures in excess of 1/2 psig will damage
control valve.
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 or opening main gas
valve located 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 all
joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Reconnect heater and equipment shutoff
valve to gas supply. Check reconnected
fittings for leaks.
Test Pressures Equal To or Less Than
1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see
Figure 14).
2. Pressurize supply piping system by either
opening propane/LP supply tank valve
for propane/LP gas or opening main gas
valve located on or near gas meter for
natural gas or using compressed air.
3. Check all joints from gas meter to equip-
ment shutoff valve for natural gas or
propane/LP supply to equipment shutoff
valve for propane/LP (see Figure 15 or
16, page 11). Apply noncorrosive leak
detection fluid to all joints. Bubbles form-
ing show a leak.
4. Correct all leaks at once.
Equipment
Shutoff
Valve
Figure 14 - Equipment Shutoff Valve
Open
Closed
119109-01G