Boiler Piping Details With The Vision I System - Munchkin Gas-Fired Hot Water Boiler Manual

GAS-FIRED BOILER
D. BOILER PIPING DETAILS WITH THE VISION I SYSTEM
Munchkin VISION 1 system
(zoning with valves)
Space heating mode
make-up water
anti-scald mixing valve
cold
water
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. All closely spaced tees shall be within 4 pipe diameter center to center spacing.
3. A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream
of all closely spaced tees.
4. The minimum pipe size for connecting a Super Stor water heater is 1 inch.
5. The minimum pipe size for connecting a Munchkin boiler shall be 1.25 inches and 2 inches for the 399M.
6. All pumps are shown with isolation flanges and integral flow check valves.
The alternative is standard flanges with full port ball valves and a separate flow check valve.
The anti-scald mixing valve is recommended if the DHW temperature is set above the factory setting of 119˚F.
7.
8. Install a minimum of 12 diameters of straight pipe upstream of all circulators.
A purging valve may be used in lieu of the ball valve / hose bib combination shown.
9.
10. Adjust differential pressure bypass valve to eliminate any flow velocity noise when zone with highest pressure
drop operates by itself.
purge
DHW
temperature
sensor
OFF
P2
thermal trap
(w/ drain plug)
high limit safety
P1
outdoor
temperature
sensor
T/P
purge
Munchkin boiler
Boiler Manual
Drawing 3A
zone
valves
differential
pressure
bypass
valve
26