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GAS-FIRED HEATER Installation Manual
Munchkin Contender Heater with optional VISION 1 system
Multiple high temperature priority loads controlled with zone valves
Drawing 3F
NOTES:
1. This drawing is meant to show system piping concept only.
Installer is responsible for all equipment & detailing required by local codes.
2. All closely spaced tees shall be within 4 pipe diameters center to center spacing.
3. A minimum of 6 pipe diameters of straight pipe shall be installed upstream & downstream of all closely spaced tees.
4. The minimum pipe size for connecting a Super Stor Ultra Indirect Water Heater is 1-inch.
5. The minimum pipe size for connecting the Munchkin Contender is 1.25-inch
6. Circulators are shown with isolation flanges and integral check valves. The alternative is standard flanges with full port ball valves
and a separate flow check valve. Purge valves can be used with the circulator flanges as an alternative.
7. Optional Vision 1 system includes temperature sensors for DHW and outdoor air and must be purchased separately.
8. The anti-scald mixing valve is recommended if the DHW temperature is set above the factory setting of 119˚F.
9. Install a minimum of 12 diameters of straight pipe upstream of all circulators.
10.
Winterization: When winterizing the Munchkin Contender, put a drain valve on both the supply and return between the union and the
shut-off connection.
anti-scald
mixing valve
OFF
closely spaced tees
purge
purge
purge
make-up water
optional high limit safety
OFF
OFF
OFF
zone
circulators
thermal trap
(w/ drain plug)
P1
P2
air handler
air handler
multi-zone
relay center
differential pressure bypass valve
high temperature loads low temperature loads
outdoor
temperature
sensor
T/P
Munchkin
Contender
Heater
Super Stor Ultra
Indirect DHW Tank
see note 6
DHW
tank
aquastat
(Vision 1 system)