Desa GWN20TB Safety Information And Installation Manual page 16

WARNING: Always operate
manual control heaters at the
locked positions. Operation
between these positions may
create a possible health hazard
if used in a poorly ventilated
room. Read owner's manual for
complete instructions.
CAUTION: Do not try to ad-
just heating levels by using the
equipment shutoff valve.
Thermocouple
Figure 21 - Pilot (actual pilot may vary)
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
1. Turn control knob clockwise
OFF position.
2. Turn off all electric power to the appliance
if service is to be performed.
3. Close equipment shutoff valve (see Figure
16, page 14).
THERMOSTAT CONTROL
OPERATION
The thermostatic control used on these
models differs from standard thermostats.
Standard thermostats simply turn on and off
the burner. The thermostat used on this heater
senses the room temperature. The thermostat
adjusts the amount of gas flow to the burner.
This increases or decreases the burner flame
height. At times the room may exceed the
set temperature. If so, the burner will shut
off. The burner will cycle back on when room
temperature drops below the set temperature.
The control knob can be set to any heat level
between 1 and 5. Selecting the 5 setting will
cause the burner to remain fully on without
modulating down in most cases.
16
oPeRaTIoN
Ignitor Electrode
Pilot Burner
www.desatech.com
Continued
Note: The thermostat sensing bulb measures
the temperature of air near the heater cabinet.
This may not always agree with room tem-
perature (depending on housing construction,
installation location, room size, open air tem-
peratures, etc.). Frequent use of your heater will
let you determine your own comfort levels.
1. Remove front panel (see Figure 7, page 9).
2. Follow steps 1 through 7 under Lighting
Instructions, page 15.
3. With control knob pressed in, strike match.
Hold match to pilot until pilot lights.
4. Keep control knob pressed in for 30 sec-
onds after lighting pilot. After 30 seconds,
release control knob. Now follow step 9,
under Lighting Instructions, page 15.
5. Replace front panel.
WARNING: Blower accessory
must be grounded. Blower comes
with a three-prong, grounding
plug as shown in Figure 22. The
plug is your protection against
electrical shock. Plug it into a
standard, three-hole, grounded,
to the
outlet. If cord needs replacing,
use only a cord with a three-
prong, grounding plug.
CAUTION: Label all wires
prior to disconnection when
servicing controls. Wiring errors
can cause improper and danger-
ous operation.
CAUTION: Do not plug power
cord into electrical outlet until
installation is complete.
Grounded
Outlet
Figure 22 - Grounding Plug
MANUAL LIGHTING
PROCEDURE
BLOWER
OPERATION
124002-01C