Munchkin Gas-Fired Hot Water Boiler, Manual, Page: 24 / 80

23
GAS-FIRED BOILER
Boiler Manual
Standard Munchkin boiler
Preferred piping (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. The alternative is standard flanges with full port ball valves.
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.
Munchkin boiler
make-up water
Super Stor
indirect DHW tank
closely
spaced
tees
P1
P2
zone
circulators
T/P
space heating zone circuit
Drawing 2C
purging
valves
anti-scald
mixing valve
cold
water
NOTE: For Vision piping applications, refer to the Vision Installation Piping Diagrams.