Munchkin MUNCHKIN HIGH EFFICIENCY HEATER with the "925" Controller Boiler User Manual


 
26
PIPING
Standard Munchkin boiler
Retrofit piping (zoning with valves)
Space heating mode
Munchkin boiler
P1
Super Stor
indirect DHW tank
T/P
Drawing 1A
make-up water
zone valves
purging
valves
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
.
V1
flow
bypass
valve
anti-scald
mixing valve
cold
water
OFF
Fig. 5-3
NOTE: FOR VISION PIPING APPLICATIONS, REFER TO THE VISION INSTALLATION PIPING DIAGRAMS.