www.desatech.com
115425-01E
7
CAUTION: Use only new, black
iron or steel pipe. Internally-tinned
copper tubing may be used in cer
-
tain areas. Check your local codes.
Use pipe of 1/2" diameter or greater
to allow proper gas volume to log
set. If pipe is too small, undue loss
of volume will occur.
Installation.must.include.an.equipment.shut-
off valve, union, and plugged 1/8" NPT tap.
Locate NPT tap within reach for test gauge
hook.up..NPT.tap.must.be.upstream.from.log.
set.(see.Figure.4).
IMPORTANT:
.Install.equipment.shutoff.valve.
in.an.accessible.location..An.equipment.shut-
off.valve.is.for.turning.on.or.shutting.off.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 a clogged burner injector.
WARNING: Use pipe joint
sealant that is resistant to liquid
petroleum (LP) gas.
Figure 4 - Gas Connection
3".Minimum
Sediment.Trap
From Gas Meter
(5".W.C.**.to.
10.5".W.C..
Pressure)
CSA Design-Certified
Equipment.Shutoff.Valve.
With 1/8" NPT Tap*
Approved Flexible Gas Hose
(if allowed by local codes)
Tee.
Joint
Pipe.
Nipple
Cap
*. Purchase. optional. CSA. design-certified.
equipment.shutoff.valve.from.your.dealer.
**.Minimum.inlet.pressure.for.purpose.of.input.
adjustment.
INSTALLATION
Continued
We. recommend. that. you. install. a. sediment.
trap in supply line as shown in Figure 4.
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.contami-
nants..This.keeps.them.from.going.into.log.set.
controls..If.sediment.trap.is.not.installed.or.is.
installed wrong, log set may not run properly.
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.
PRESSURE TESTING GAS SUPPLY
PIPING SYSTEM
Test Pressures In Excess Of 1/2 PSIG
(3.5 kPa)
1.. Disconnect.log.set.and.its.individual.equip-
ment.shutoff.valve.from.gas.supply.piping.
system.
2. Cap off open end of gas pipe where equip
-
ment shutoff valve was connected.
3. Pressurize supply piping system by either
using.compressed.air.or.opening.main.gas.
valve.located.on.or.near.gas.meter.
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.log.set.and.equipment.shutoff.
valve.to.gas.supply..Check.reconnected.
fittings for leaks.
