Checking Gas Connections - Comfort Glow CGD3018N Owner's Operation And Installation Manual

INSTALLATION
12
Connecting To Gas Supply (Cont.)

Checking Gas Connections

INSTALLATION
Continued
Installation must include an equipment shutoff valve, union, and
plugged 1/8" NPT tap. Locate NPT tap within reach for test gauge
hook up. NPT tap must be upstream from heater (see Figure 15).
IMPORTANT: Install equipment shutoff valve in an accessible
location. The equipment valve is for turning on or shutting off the
gas to the appliance.
Check your building codes for any special requirements for locating
equipment shutoff valve to fireplaces.
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 clogged heater valves.
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 15. 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.
CSA Design-Certified Equipment
From Gas Meter
Shutoff Valve With 1/8" NPT Tap*
(5" W.C.** to
10.5" W.C.
Pressure)
Tee
Joint
3" Minimum
Pipe
Nipple
Cap
Sediment Trap
Figure 15 - Gas Connection
* Purchase the optional CSA design-certified equipment shutoff
valve from your dealer. See Accessories, page 36.
** Minimum inlet pressure for purpose of input adjustment.
For more information, visit www.desatech.com
For more information, visit www.desatech.com
CHECKING GAS CONNECTIONS
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
2. Cap off open end of gas pipe where equipment shutoff valve
3. Pressurize supply piping system by either using compressed
4. Check all joints of gas supply piping system. Apply a noncor-
5. Correct all leaks at once.
6. Reconnect heater and equipment shutoff valve to gas supply.
Test Pressures Equal To or Less Than 1/2 PSIG (3.5 kPa)
Approved Flexible
1. Close equipment shutoff valve (see Figure 16).
Gas Hose (if allowed
2. Pressurize supply piping system by either using compressed
by local codes)
3. Check all joints from gas meter to equipment shutoff valve
4. Correct all leaks at once.
Gas
Regulator
Figure 16 - Equipment Shutoff Valve
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.
valve) and equipment shutoff valve from gas supply piping sys-
tem. Pressures in excess of 1/2 psig will damage heater regulator.
was connected.
air or opening main gas valve located on or near gas meter.
rosive leak detection fluid to gas joints. Bubbles forming show
a leak.
Check reconnected fittings for leaks.
air or opening main gas valve located on or near gas meter.
(see Figure 17, page 13). Apply a noncorrosive leak detection
fluid to gas joints. Bubbles forming show a leak.
Equipment
Shutoff Valve
Open
O
POS
Closed
PO
107123-01F