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111160-01B
For more information, visit www.desatech.com
For more information, visit www.desatech.com
12
CAUTION: Avoid damage to regulator. Hold gas
regulator with wrench when connecting it to gas
piping and/or fittings.
Figure 16 - Gas Connection
* Purchase the optional CSA design-certified equipment shutoff
valve from your dealer. See Accessories, page 26.
** 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 sys-
tem. 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 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 a noncor-
rosive 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.
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.
WARNING: Test all gas piping and connections,
internal and external to unit, for leaks after installing
or servicing. 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
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 16).
IMPORTANT:
Install equipment valve in an accessible location.
The equipment shutoff 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.
We recommend that you install a sediment trap in supply line as
shown in Figure 16. 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.
WARNING: Use pipe joint sealant that is resistant
to liquid petroleum (LP) gas.
INSTALLATION
Continued
Cap
3" Minimum
Sediment Trap
Gas
Regulator
CSA Design-Certified
Equipment Shutoff Valve
With 1/8" NPT Tap*
Approved Flexible Gas
Hose (if allowed by
local codes)
Tee Joint
Pipe Nipple
INSTALLATION
Connecting to Gas Supply (Cont.)
Checking Gas Connections
Figure 15 - External Regulator With Vent Pointing Down
Propane/LP
Supply Tank
External
Regulator
Vent Pointing
Down
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)