Munchkin 399M manual Mixing valve

PIPING

Standard Munchkin boiler

Preferred piping (zoning with valves) Space heating mode

Drawing 2A

	zone valves
make-up water	P2
closely		differential
spaced		pressure
tees		bypass
		valve
purging		V1
valves		OFF
		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.

Fig. 5-5

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