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200213-01B
20
THERMOSTAT CONTROL OPERATION
TO TURN OFF GAS TO APPLIANCE
Shutting Off Heater
Turn control knob clockwise
to the
OFF position.
Shutting Off Burner Only (pilot
stays lit )
Turn control knob clockwise
to the
PILOT position.
The thermostatic control used on this model
differs from standard thermostats. Standard
thermostats simply turn the burner on and off.
The thermostat used on this heater senses
the room temperature. 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 comfort level between 1 and 5.
OFF
HIGH
LOW
PILOT/IGN
OPERATION
1. STOP! Read the safety information on
page 19.
2. Check that gas supply to heater is on.
3. Push in gas control knob slightly and turn
clockwise
to the OFF position.
4. Wait five (5) minutes to clear out any gas.
Then smell for gas, including near the
floor. If you smell gas, STOP! Follow "B"
in the safety information on on page 18. If
you do not smell gas, go to the next step.
5. Push in gas control knob slightly and turn
counterclockwise
to "PILOT/IGN"
and press for five (5) seconds
Note: The first time that the heater is oper-
ated after connecting the gas supply, the
control knob should be pressed for about
thirty (30) seconds. This will allow air to
bleed from the gas system.
6. With control knob pressed in, push down
and release the ignitor button. This will
light pilot. If needed, keep pressing ignitor
button until pilot lights.
7. Keep control knob pressed for ten (10)
seconds after lighting pilot. If pilot goes
out, repeat steps 5, 6 and 7.
8. To select the desired heating level, par-
tially press down the control knob slightly
and rotate counterclockwise
.
Release the downward pressure on the
knob while continuing to turn until the knob
locks at the desired setting position. Do
not operate between locked positions. Set
control knob to desired heating position.
Note: Both HIGH and LOW are locked
positions. You must press in control knob
before turning it from these positions.
Figure 21 - Control Knob in the OFF
Position
Ignitor Button
Control Knob
MODEL MNSD100HBA
LIGHTING INSTRUCTIONS
Note: If pilot goes out, repeat steps 3
through 7. This heater has a safety inter-
lock system. Wait one (1) minute before
lighting pilot again.
8. Turn control knob counterclockwise
to desired heating level. The main burner
should light. Set control knob to any heat
level between 1 and 5.
CAUTION: Do not try to ad-
just heating levels by using the
equipment shutoff valve.
