Munchkin Gas-Fired Hot Water Circulating Heater - Manual (Page 27)

26
GAS-FIRED HEATER
Installation Manual
Munchkin Contender Heater with optional VISION 1 system
(zoning with valves)
Space heating mode
Drawing 2A
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. 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.
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.
Munchkin
Contender
Heater
DHW
temperature
sensor
purge
purge
purge
optional high limit safety
zone
valves
Super Stor Ultra
Indirect DHW Tank
anti-scald mixing valve
outdoor
temperature
sensor
thermal trap
(w/ drain plug)
differential
pressure
bypass
valve
make-up water
OFF
P1
P2
T/P
see note 6
(Vision 1 system)
(Vision 1 system)
D. HEATER PIPING DETAILS WITH THE VISION I SYSTEM