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 13).
IMPORTANT: Install equipment shutoff valve in an accessible location within 6 feet of the appli- ance. The equipment shutoff valve is for turning on or shutting off the gas to the appliance.
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 13, depending on your model. 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.
Approved Flexible Gas Hose (if allowed by local codes)
CAUTION: Avoid damage to gas control. Hold gas control with wrench when connecting it to gas piping and/or fittings.
CHECKING GAS CONNECTIONS
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 detec- tion fluid to all joints. Bubbles forming show a leak. Correct all leaks at once.
CAUTION: Make sure ex- ternal regulator has been in- stalled between propane/LP supply and heater. See guide- lines under Connecting to Gas Supply, page 13.
To Gas
Control
Valve
CSA
Equipment Shutoff Valve
With 1/8" NPT Tap*
3" Minimum 
Tee | Pipe | Cap |
Joint | Nipple |
|
Propane/LP - From
External Regulator
(11" W.C.** To 14"
W.C. Pressure)
Natural - From Gas
Meter (5" W.C.**
To 10.5" W.C.
Pressure)
Sediment Trap
Figure 13 - Gas Connection
*Purchase the optional CSA
**Minimum inlet pressure for purpose of input adjustment.
14 | www.desatech.com |
