Munchkin Gas-Fired Hot Water Boiler, Manual, Page: 32 / 80

31
GAS-FIRED BOILER
Boiler Manual
Munchkin VISION 1 system
(zoning with circulators)
Space heating mode
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 diameter center to center spacing.
3. A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream
of all closely spaced tees.
4.
The minimum pipe size for connecting a Super Stor water heater is 1 inch.
5. The minimum pipe size for connecting a Munchkin boiler shall be 1.25 inches and 2 inches for the 399M.
6.
All pumps are shown with isolation flanges and integral flow check valves.
The alternative is standard flanges with full port ball valves and a separate flow check valve.
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. A purging valve may be used in lieu of the ball valve / hose bib combination shown.
Drawing 4A
Munchkin boiler
DHW
temperature
sensor
closely spaced tees
purge
make-up water
high limit safety
zone
circulators
Super Stor
indirect DHW tank
anti-scald mixing valve
outdoor
temperature
sensor
thermal trap
(w/ drain plug)
T/P
P1
P2
OFF
purge
make-up water
cold
water
purge