Desa SL30NT/SL30PT - Manual (Page 9)

111487-01B
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9
9
INSTALLATION
Continued
WARNING: Use pipe joint sealant that is resistant
to liquid petroleum (LP) gas.
INSTALLATION
Connecting to Gas Supply (Cont.)
Checking Gas Connections
Tee Pipe Cap
Joint Nipple
Figure 8 - Gas Connection
3" Minimum
Sediment Trap
Gas
Regulator
(Propane/LP)
From External
Regulator (11"
W.C.** to 14"
W.C. Pressure)
CSA Design-Certified
Equipment Shutoff Valve
With 1/8" NPT Tap*
Approved Flexible
Gas Hose (if allowed
by local codes)
CAUTION: Avoid damage to regulator. Hold gas
regulator with wrench when connecting it to gas
piping and/or fittings.
We recommend that you install a sediment trap in supply line as
shown in Figure 8. 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.
* Purchase the optional CSA design-certified equipment shutoff
valve from your dealer. See Accessories, page 17.
** Minimum inlet pressure for purpose of input adjustment.
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.
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 sys-
tem. Pressures in excess of 1/2 psig will damage heater regulator.
2. Cap 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 fittings for leaks.
Test Pressures Equal To or Less Than 1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Figure 9).
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 for natural or propane/LP sup-
ply to equipment shutoff valve (see Figure 10 or 11, page 10).
Apply noncorrosive leak detection fluid to gas joints. Bubbles
forming show a leak.
4. Correct all leaks at once.
CAUTION: Make sure external regulator has been
installed between propane/LP supply and propane/
LP heater. See guidelines under
Connecting to Gas
Supply, page 8.
ON
POSIT
O
POS
Figure 9 - Equipment Shutoff Valve
Closed
Equipment
Shutoff
Valve
Open