Munchkin MUNCHKIN HIGH EFFICIENCY HEATER with the "925" Controller manual Standard Munchkin boiler

PIPING

Standard Munchkin boiler

Retrofit piping (zoning with valves) Space heating mode

Drawing 1A

	zone valves
make-up water	P1
		flow
purging		bypass
valves		valve
		V1
		OFF
		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. 5-3

26