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not try to light the burner by hand.
4. Remove front cover.
5. Turn gas shutoff valve to "off" position.
6. Wait five (5) minutes to clear out any gas. If you then smell gas, STOP! Follow Part 6, Section
B/Lighting Instructions in the safety information. If you don't smell gas, go to the next step.
7. Turn the gas shutoff valve to "on" position.
8. Replace the Front Cover.
9. Turn on all electric power to appliance.
10. Set the temperature to the desired setting.
11. If the appliance will not operate, follow the instructions "To Turn Off Gas To Appliance"
Section E and call your service technician or gas supplier.
E. ADJUSTING THE OPERATING SET POINTS OF THE MUNCHKIN VWH DISPLAY
To adjust the temperature set point value of the Munchkin VWH Boiler, press the { | S 3/Program} key for
three seconds until you see Sh then an alternating value of 7°F. This is the default setting for the unit
differential setting which operates off of the supply sensor. To advance to the next function, press
the { | S 3/Program} key to advance to the next setting. Any function may be changed by pressing either
the { | S 1/-| } key or { | S 2/-| } key on the display to either increase or decrease the setting. After the settings
have been established, the user will advance through the functions pressing the { | S 3/Program} key
until the display shows the outlet temperature of the unit. The system settings are now programmed
into the control. Listed below are the set points that can be programmed into the control.
Function
Supply Sensor Differential
Temperature Set Point
Tank Sensor Differential Set Point
Temp. Measurement
Note: When using a mechanical control on the storage tank, it is recommend that the temperature
set-point on the Munchkin VWH boiler is set 5°F above the setting of the mechanical control located
on the storage tank .The Munchkin VWH will modulate its firing rated based on the supply temper-
ature sensor until the mechanical control temperature set point is reached.
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.
F. STATUS MENU
Installers are also able to check the current status of the Munchkin parameters by pressing { | S 4/Reset| }
key for 3 seconds. Once activated, the display will show { | d 1| } alternating value of the actual outlet tem-
perature. 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 val-
ues cannot be changed. To exit this menu, simply press { | S 3/Program| } key to resume normal operation.
32
Set Point Adjustment
Display
Default Setting
sh
29° F
dd
119° F
dh
7° F
t
Fahrenheit to Celcius
n
DANGER
START-UP PROCEDURES
Range of Adjustment
5–30° F
95° F/185° F
1–18° F
F or C
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