Munchkin MUNCHKIN HIGH EFFICIENCY HEATER with the "925" Controller manual Drawing 1B, Piping

PIPING

Standard Munchkin boiler

Retrofit piping (zoning with valves) Domestic water heating mode

Drawing 1B

zone valves
OFF	OFF	OFF	OFF
make-up water
P1
			flow
purging			bypass
valves			valve
V1
			anti-scald
		mixing valve
			cold
			water
T/P
Munchkin boiler		Super Stor
		indirect DHW tank
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

NOTE: FOR VISION PIPING APPLICATIONS, REFER TO THE VISION INSTALLATION PIPING DIAGRAMS.

Fig. 5-4

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