Desa CCL3018PTA - Manual (Page 15)

www.desatech.com 113097-01C 15
INSTALLATION
Continued
CAUTION: Make sure exter-
nal regulator has been installed
between propane/LP supply and
heater. See guidelines under Con-
necting to Gas Supply, page 13.
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 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 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 com-
pressed air.
4. Check all joints of gas supply piping system.
Apply a 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 16).
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 to equipment
shutoff valve for natural gas or propane/LP
supply to equipment shutoff valve for pro-
pane/LP (see Figures 17 and 18). 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 16).
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 thermostat gas valve (Thermostat-Con-
trolled Models) or to control valve (Manu-
ally-Controlled Models) (see Figures 17 and
18). 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, page
19 [manually-controlled models] or page 21
[thermostatically-controlled models]). Check
all other internal joints for leaks.
7. Turn off heater (see To Turn Off Gas to Appli-
ance, page 20 [manually-controlled models] or
page 22 [thermostatically-controlled models]).
Figure 16 - Equipment Shutoff Valve
Figure 17 - Checking Gas Joints
(Propane/LP Gas Models)
Equipment
Shutoff Valve Propane/LP
Supply Tank
Thermostat Gas Valve or
Control Valve Location
Figure 18 - Checking Gas Joints (Natural
Gas Models)
Gas Meter
Equipment
Shutoff Valve
Thermostat Gas Valve or
Control Valve Location
Equipment
Shutoff
Valve Open
Closed