Drawing 1b, Piping, Fig. 5-4 – Munchkin HIGH EFFICIENCY HEATER with the "925" Controller User Manual
Page 27
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PIPING
Standard Munchkin boiler
Retrofit piping (zoning with valves)
Domestic water heating mode
Munchkin boiler
P1
Super Stor
indirect DHW tank
T/P
Drawing 1B
make-up water
purging
valves
V1
zone valves
flow
bypass
valve
anti-scald
mixing valve
NOTES:
1.
This drawing is meant to show system piping concept only.
Installer is responsible for all equipment & detailing required by local codes.
2.
Adjust flow bypass valve for the following minimum boiler flow rates in any operating mode:
Munchkin model T50M: 3 gpm
Munchkin model T80M: 3 gpm
Munchkin model 80M: 3 gpm
Munchkin model 140M: 5 gpm
Munchkin model 199M: 7 gpm
3.
The minimum pipe size for connecting a Super Stor water heater is 1 inch.
4.
The minimum pipe size for connecting a Munchkin boiler is 1.25 inches.
5.
All pumps are shown with isolation flanges. The alternative is standard flanges with full port ball valves.
6.
The anti-scald mixing valve is recommended if the DHW temperature is set above the factory setting of 119˚F.
7.
Install a minimum of 12 diameters of straight pipe upstream of all circulators.
8.
A purging valve may be used in lieu of the ball valve / hose bib combination shown
.
cold
water
OFF
OFF
OFF
OFF
Fig. 5-4
NOTE: FOR VISION PIPING APPLICATIONS, REFER TO THE VISION INSTALLATION PIPING DIAGRAMS.