Munchkin Gas-Fired Hot Water Circulating Heater - Manual (Page 51)

50
GAS-FIRED HEATER
Installation Manual
Outdoor Sensor Function The user can pro-
gram the desired supply temperature based on
the heat transmitter (Baseboard, Radiant Floor,
Air Handler) that will be used in the installation.
Once the outdoor sensor (Light Green Wires) is
connected to the control board, the water tem-
perature of the heater will adjust to run the
heater more efficiently and provide greater com-
fort to the living space.
Connection Specification – Wire 22 AWG
maximum to 100 feet or 18 AWG up to
150 feet. Length of wire run cannot
exceed 150 feet.
Outdoor Sensor is connected in the junction
box on the Munchkin Contender. Route wires
from the Munchkin Contender terminal strip to
your outdoor sensor, which will allow the user to
change the temperature going to the Central
Heating loop automatically. Place the outdoor
sensor preferably to the north or northwest or to
the side which will be affected by changing
weather conditions outside. NOTE: Do not
locate the sensor in the direct sunlight.
Indirect Sensor Function: The Maximum
run time on priority function for the Super Stor
Ultra Indirect Fired Water Heater is from 1-60
minutes. The water temperature can only be
adjusted when using a sensor (not a mechanical
control). Temperature adjustments are from 95
to 185 degrees, plus a differential 1-18 degrees
(Note: It is recommend that you do not exceed
5 minutes on the DHW pump post purge cycle
to avoid cooling down your DHW tank).
Indirect Sensor is connected to the main
control on the Munchkin Contender. Route wires
from the terminal strip to the sensor or the
mechanical control Honeywell Part # L4080b-
1395 (Not included in Vision I Package) into the
control well located in the front of the water
heater. This will allow the installer to control the
temperature of the indirect from the Munchkin
Contender and give the water heater priority
over the Central Heating Circuit. Once the Water
Heater is satisfied, the heater will then switch
back to the Central Heating Circuit only if there
is a call for heat, otherwise the Munchkin
Contender will then shut down.
Indirect Circulator (P2) Program
function: The indirect water heater circulator
program function will automatically start when
the water heater sensor reads a call for heat, the
installer can also program the post purge
function on the circulator. The Post purge
circulator function ranges from 1-30 minutes.
Indirect Circulator (P2) is connected to the
terminal strip on the Munchkin Contender. Run
the wire to the Super Stor Ultra Indirect circulat-
ing pump. The purple wire will be your neutral
lead and the pink wire will be your hot. This will
supply 120 volts to the water heater circulator
directly.
Fault Code Alarm Output is connected to
the main controller on the Munchkin Contender.
Route wire from the Munchkin Contender con-
troller to an external relay or an audible alarm.
The red wire will be your hot lead supplying 120
volts. The neutral connection will be connected
to the neutral on the incoming power to the
Munchkin Contender.
Connection Specification – Wire 18 AWG
maximum. Length of wire run cannot
exceed 100 feet.
CAUTION
The wire to outdoor sensor must not be laid
closer than 6' to line voltage wiring (120/240 V)
and must never be in the same conduit.
CAUTION
Do not tie neutrals or hot wire leads to any
o t h e r w i r e s , g o d i r e c t l y f r o m t h e
Munchkin Contender controller to the circulator.
PART 10: FIELD WIRING – VISION 1 OPTION