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12
INSTALLATION
Connecting To Gas Supply (Cont.)
Checking Gas Connections
INSTALLATION
Continued
CSA Design-Certified Equipment Shutoff
Valve With 1/8" NPT Tap*
Approved Flexible Gas
Hose (if allowed by local
codes)
Gas Control
Figure 13 - Gas Connection (Remote-Ready Models Only)
* Purchase the optional CSA design-certified equipment shutoff valve from
your dealer. See Accessories, page 27.
**Minimum inlet pressure for purpose of input adjustment.
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.
CAUTION: Make sure external regulator has been installed between
propane/LP supply and heater. See guidelines under Connecting to
Gas Supply, page 11.
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 valve)
and equipment shutoff valve from gas supply piping system. Pressures
in excess of 1/2 psig will damage heater regulator.
2.
Cap off open end of gas pipe where equipment shutoff valve was con-
nected.
PROPANE/LP
- From External
Regulator
(11" W.C.**
To 14" W.C.
Pressure)
3" Minimum
NATURAL
- From Gas
Meter
(5" W.C.**
To 10.5" W.C.
Pressure)
Pipe
Cap
Tee
Nipple
Joint
Sediment Trap
For more information, visit www.desatech.com
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 equipment shutoff valve for natural
gas or propane/LP supply to equipment shutoff valve for propane/LP
(see Figure 15, page 13). Apply noncorrosive leak detection fluid to all
joints. Bubbles forming show a leak.
4.
Correct all leaks at once.
Pressure Testing Heater Gas Connections
1.
Open equipment shutoff valve (see Figure 14).
2.
Open main gas valve located on or near gas meter for natural gas or
open propane/LP supply tank valve.
3.
Make sure control knob of heater is in the OFF position.
4.
Check all joints from equipment shutoff valve to gas control (see Figures
15 and 16 page 13). Apply noncorrosive leak detection fluid to all joints.
Bubbles forming show a leak.
5.
Correct all leaks at once.
6.
Light heater (see Operating Heater, pages 14 through 16). Check all
other internal joints for leaks.
7.
Turn off heater.
Equipment
Shutoff
Valve
Figure 14 - Equipment Shutoff Valve
MANUAL SHUT-OFF VALVE
ON
POSITION
(OPEN)
OFF
POSITION
(CLOSE)
GRH/OV 020
114745-01
114745-01
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