Cedar Ridge MTF4TPU Manual Del Usuario página 17

Apply pipe joint sealant lightly to male threads.
This will prevent excess sealant from going
into pipe. Excess sealant in pipe could result
in clogged heater valves.
The installer must supply an external regula-
tor. The external regulator will reduce incom-
ing gas pressure. You must reduce incoming
gas pressure to between 11" and 14" of water.
If you do not reduce incoming gas pressure,
heater regulator damage could occur. Install
Ground
Joint Union
Tee Joint
Reducer
Bushing to
Test Gauge
1/8" NPT
Connection*
1/8" NPT
Plug Tap
Tee Joint
Sediment
Pipe Nipple
Trap
Gap
Figure 17 - Gas Connection
* Purchase the optional CSA design-certified equipment
shutoff valve from your dealer.
WARNING: Test all gas piping
and connections for leaks after
installing or servicing. Correct
all leaks at once.
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 sys-
tem. Pressures 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
using compressed air or opening gas sup-
ply valve.
200032-01A
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INSTALLATION
external regulator with the vent pointing down
as shown in Figure 18. Pointing the vent down
protects it from freezing rain or sleet.
Install sediment trap in supply line as shown
in Figure 17. Place sediment trap where it is
within reach for cleaning. Place 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.
3/8" NPT
Pipe Nipple
Equipment
Shutoff Valve
Natural Gas
From Gas Meter (7"
W.C.** to 10.5" W.C.
Pressure)
3" Minimum
CHECKING GAS CONNECTIONS
4. Check all joints of gas supply piping
5. Correct all leaks at once.
6. Reconnect heater and equipment shutoff
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Propane/LP
Supply Tank
Propane/LP
From External
Regulator (11"
W.C.** to 14" W.C.
Pressure)
Figure 18 - External Regulator
with Vent Pointing Down
WARNING: Never use an open
flame to check for a leak. Apply a
noncorrosive leak detection fluid
to all joints. If bubbles form, there
is a leak. Correct all leaks at once.
system. Apply mixture of liquid soap and
water to gas joints. If bubbles form, there
may be a leak.
valve to gas supply. Check reconnected
fittings for leaks.
External
Regulator with
Vent Pointing
Down
17