Munchkin MUNCHKIN HIGH EFFICIENCY HEATER with the "925" Controller manual Drawing 2B, Piping

PIPING

Standard Munchkin boiler

Preferred piping (zoning with valves) Domestic water heating mode

Drawing 2B

	zone valves
make-up water	OFF	OFF	OFF	OFF
	P2
closely				differential
spaced				pressure
tees				bypass
				valve
purging	V1
valves
				anti-scald
			mixing valve
				cold
				water
	P1
	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 differential pressure bypass valve to eliminate any flow velocity noise when zone with highest pressure drop operates by itself.

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.

9.A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream of all closely spaced tees.

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

Fig. 5-6

29