Munchkin Gas-Fired Hot Water Circulating Heater - Manual (Page 55)

54
GAS-FIRED HEATER
Installation Manual
PART 12. START-UP PROCEDURE
(CONTINUED)
A. OPERATING INSTRUCTIONS
Remove Munchkin Contender Heater cover. If
you smell gas, STOP. Follow listed safety
instructions. If you do not smell gas, follow the
next steps.
1. Turn on all electric power to appliance.
2. Adjust the temperature setpoint of the
Munchkin Contender Heater if desired. The
factory default setting is 180°. If changes are
ncessary follow “Adjusting The Munchkin
Setpoint” in this section.
3. Set the thermostat to the desired setting.
4. If the appliance fails to start, refer to the
Troubleshooting section in the back of this
manual.
B. ADJUSTING THE SETPOINT
1. Before you can change the temperature from
the factory setting of 180 degrees. You must
make sure that none of the thermostats are call-
ing for heat. The controller will not memorize a
program setting while in a heating cycle. To
adjust the temperature to the Munchkin
Contender simply press in the {S3/Program} key
for three seconds until you see a flashing (C)
then an alternate value of (180). This number is
the factory set point of the unit, which is 180
degrees. To change the temperature, simply
push either the {S1/-} or {S2/+} on the display.
The {S1/-} button will decrease the temperature
while the {S2/+} will increase the temperature of
the Munchkin. The temperature of the heater
can be set as low as 50 Degrees and as high 180
Degrees. These ranges are your maximum and
minimum ranges of the heater. In addition to
changing the temperature you are also allowed
to change three more settings in this model (1.
Munchkin Contender Heater differential – 2.
Indirect setting (with Vision System option) – 3.
Celsius to Fahrenheit measurement. Simply
press in the {S3/Program} key to get to next value,
the Munchkin Contender Heater differential set-
ting will appear in the display ch and alternating
value of 30. This allows the installer to adjust the
activation of the burner based on the differential
temperature setting of the Munchkin Contender
Heater. The burner will not start until the outlet
water temperature reaches a temperature that is
equal to the temperature setting for the
Munchkin Contender Heater, minus the differen-
tial EX: The Heater is set to heat at 180° F
degrees and the differential is set at 30° F. The
burner will not start until the outlet temperature
of the system reaches 149° F degrees (180° – 30°
F = 150° F). To adjust, press either {S1/-}
(Decrease Value) or {S2/+} (Increase Value)
Ranges 5° F to 30° F. Press the {S3/Program} key
again and you will see the Indirect Setting de
and an alternative value of 119 (with Vision
Systems option) To adjust, press either {S1/-}
Decrease Value) or {S2/+} (Increase Value).
The final adjustment in this mode is the Fahrenheit
to Celcius measurement. Press the {S3/Program}
key again and you will see t and alternating value
of F. To change value press the {S1/-} or {S2/+} to
choose the correct measurement.
C. STATUS MENU
Installers are also able to check the current status
of the Munchkin Contender Heater parameters by
pressing {S4/RESET} key for 3 seconds. Once acti-
vated, the display will show |d1| alternating value
of the actual outlet temperature. Actual values are
displayed for each function. To view the next
value simply press the {S/4} key to go to the next
displayed value. Listed below are the values
which can be displayed. These values cannot be
changed. To exit this menu, simply press
{S3/Program} key to resume normal operation.
Function Value
d1 —
Actual Temperature from outlet sensor
d2 — Actual Temperature from inlet sensor
d3 — If using a standard mechanical control,
the control will display |1| for closed |0|
for open
If the sensor is connected to the
SuperStor Indirect Fired Water Heater
it will measure the actual temperature.
(Vision option.)
DANGER
Water temperature over 125
degrees F. can cause severe
burns instantly, or death from
scalds. Children, disabled, and
elderly are at highest risk of
being scalded. See instruction
manual before setting temperature at water
heater. Feel water before bathing or showering!
Temperature limiting valves are available.