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24
GAS-FIRED HEATER Installation Manual
Multiple Munchkin Contender Heaters
Preferred piping
(zoning with circulators)
Domestic water heating mode
Drawing 1F
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. The anti-scald mixing valve is recommended if the DHW temperature is set above the factory setting of 119˚F.
8. Install a minimum of 12 diameters of straight pipe upstream of all circulators.
9.
Winterization: When winterizing the Munchkin Contender, put a drain valve on both the supply and return between the union and the
shut-off connection.
make-up water
closely
spaced
tees
space heating zone circuit
purging
valves
Super Stor Ultra
indirect DHW Tank
anti-scald
mixing valve
zone
circulators
cold
water
Munchkin
Contender
Heaters
T/P
T/P
purging
valves
see note 6