INSTALLATION
Continued
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 14. Locate sedi- ment trap where it is within reach for cleaning. Install in piping system between fuel supply and heater. Locate sediment trap where trapped mat- ter 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.
CHECKING GAS CONNECTIONS
WARNING: Test all gas pip- ing and connections, internal and external to unit, for leaks after installing or servicing. Cor- rect all leaks at once.
WARNING: Never use an open flame to check for a leak. Apply a noncorrosive leak de- tection fluid to all joints. Bubbles forming show a leak. Correct all leaks at once
CAUTION: Make sure exter- nal regulator has been installed between propane/LP supply and heater.SeeguidelinesunderCon- necting to Gas Supply, page 13.
CSA Design- | PROPANE/LP |
Certified Equipment | From External |
Shutoff Valve With | Regulator (11" |
1/8" NPT Tap* | W.C.** to 14" W.C. |
| Pressure) |
Approved | NATURAL | ||
From Gas Meter | |||
Flexible Gas | |||
(5" W.C.** to | |||
Hose (if | |||
| 10.5" W.C. | ||
allowed by |
| ||
| Pressure) | ||
local codes) |
| ||
| 3" Minimum |
| |
| Cap | Pipe Tee | |
|
| Nipple Joint | |
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 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 lo- cated on or near gas meter for natural gas, or using compressed air.
Gas | Sediment Trap |
Control |
|
Figure 14 - Gas Connection
*Purchase the optional CSA
**Minimum inlet pressure for purpose of input adjustment.
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 heater and equipment shutoff valve to gas supply. Check reconnected fittings for leaks.
14 | www.desatech.com |
