Checking Gas Connections - Desa LSL3124N Owner's Operation And Installation Manual

INSTALLATION
12
Connecting to Gas Supply (Cont.)

Checking Gas Connections

INSTALLATION
Continued
CAUTION: Avoid damage to regulator. Hold gas
regulator with wrench when connecting it to gas
piping and/or fittings.
PROPANE/LP CSA Design-Certified Equipment
From External Shutoff Valve With 1/8" NPT Tap*
Regulator
(11" W.C.**
to 14" W.C.
Pressure)
NATURAL
From Gas
3" Minimum
Meter
(5" W.C.**
to 10.5" W.C.
Tee Cap
Pressure)
Joint
Sediment Trap
Figure 14 - Gas Connection
* Purchase the optional CSA design-certified equipment shutoff valve
from your dealer. See Accessories, page 28.
** Minimum inlet pressure for purpose of input adjustment.
CHECKING GAS CONNECTIONS
WARNING: Test all gas piping 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 detection fluid to
all joints. Bubbles forming show a leak. 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.
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.
For more information, visit www.desatech.com
For more information, visit www.desatech.com
Approved Flexible
Gas Hose (if allowed
by local codes)
Pipe
Nipple
Gas Regulator
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 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.
Test Pressures Equal To or Less Than 1/2 PSIG (3.5 kPa)
1. Close equipment shutoff valve (see Figure 15).
2. Pressurize supply piping system by either opening propane/LP sup-
ply 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.
3. Check all joints from gas meter to equipment shutoff valve for
natural gas or propane/LP supply to equipment shutoff valve
for propane/LP (see Figures 16 and 17, page 13). Apply non-
corrosive leak detection fluid to all joints. Bubbles forming
show a leak.
4. Correct all leaks at once.
Pressure Testing Heater Gas Connections
1. Open equipment shutoff valve (see Figure 15).
2. Open main gas valve located on or near gas meter for natural
gas or open propane/LP supply tank valve.
3. Make sure control knob of heater is in the OFF position.
4. Check all joints from equipment shutoff valve to control valve
(see Figures 16 and 17, page 13). Apply noncorrosive leak
detection fluid to all joints. Bubbles forming show a leak.
5. Correct all leaks at once.
6. Light heater (see Operating Heater, pages 14 through 17, de-
pending on your model). Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appliance, page 16 or
17, depending on your model).
Equipment
Shutoff
Valve
Figure 15 - Equipment Shutoff Valve
Open
ON
POSITION
Closed
OFF
POSITION
111347-01B