Munchkin Gas-Fired Hot Water Circulating Heater - Manual (Page 21)

20
GAS-FIRED HEATER
Installation Manual
Standard Munchkin Contender Heater
(zoning with valves)
Domestic water heating mode
Super Stor Ultra
indirect DHW Tank
Drawing 1B
make-up water
OFF OFF OFF OFF
zone valves
anti-scald
mixing valve
purging
valves
closely
spaced
tees
differential
pressure
bypass
valve
P2
Munchkin
Contender
Heater
T/P
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. The alternative is standard flanges with full port ball valves. 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.
see note 6