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 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.
CHECKING GAS CONNECTIONS
WARNING:Testallgaspiping 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
CAUTION: Avoid damage to regulator. Hold gas regulator with wrench when connecting it to gas piping and/or fittings.
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 | ||
(5" W.C.** to | ||
Gas Hose (if | ||
10.5" W.C. | ||
allowed by | ||
local codes) | Pressure) |
| 3" Minimum |
| Cap Pipe Tee |
| Nipple Joint |
Gas | Sediment Trap |
Control |
|
Figure 14 - Gas Connection
*Purchase the optional CSA
Accessories, page 34.
** Minimum inlet pressure for purpose of input adjustment.
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 connected.
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 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 fit- tings for leaks.
14 | www.desatech.com |
