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111515-01C
For more information, visit www.desatech.com
For more information, visit www.desatech.com
13
13
INSTALLATION
Continued
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 12.
CHECKING GAS CONNECTIONS
INSTALLATION
Checking Gas Connections
Figure 17 - Equipment Shutoff Valve
Equipment
Shutoff
Valve
ON
POSITION
OFF
P
OS
ITI
O
N
Open
Closed
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 (con-
trol valve) and equipment shutoff valve from gas supply pip-
ing 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 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 17).
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 18 and 19). Apply noncorrosive
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 17).
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 to gas control (see Figures 18 or 19). Apply
noncorrosive leak detection fluid to all joints. Bubbles form-
ing show a leak.
5. Correct all leaks at once.
6. Light heater (see Operating Heater, pages 15 through 17).
Check all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appliance, page 16).
Figure 18 - Checking Gas Joints (Propane/LP only)
Gas Control
Valve Location
Propane/LP
Supply Tank
Equipment Shutoff Valve
Figure 19 - Checking Gas Joints (Natural Gas Only)
Gas Meter
Gas Control
Valve Location
Equipment Shutoff Valve