Boiler Manual
GAS-FIRED BOILER
M. BOILER PIPING DETAILS
Piping Symbol Legend
circulator
(w/ isolation flanges)
pressure reducing valve
circulator w/
integral flow check)
diff. pressure bypass
gate valve
globe valve
anti-scald rated
mixing valve
ball valve
pressure gauge
swing-check valve
flow-check valve
spring-loaded check valve
4-way motorized
mixing valve
3-way motorized
mixing valve
Munchkin heater
hose bib / boiler drain
pressure relief valve
thermostatic radiator valve
TRV (straight)
thermostatic radiator valve
TRV (angle)
circuit setter
backflow preventer
float -type
air vent
union
manual 3-way valve
heat exchanger
zone valve
air separator
vacuum breaker
diaphragm-type
expansion tank
radiant manifold
21
Super Stor
indirect DHW tank
Boiler Manual
GAS-FIRED BOILER
Standard Munchkin boiler
Preferred piping (zoning with valves)
Space heating mode
Drawing 2A
zone valves
make-up water
P2
closely
spaced
tees
differential
pressure
bypass
valve
purging
valves
V1
OFF
anti-scald
mixing valve
cold
water
P1
T/P
Munchkin boiler
Super Stor
indirect DHW tank
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
This drawing is meant to show system piping concept only.
Installer is responsible for all equipment & detailing required by local codes.
Adjust differential pressure bypass valve to eliminate any flow velocity noise when zone with highest pressure
drop operates by itself.
The minimum pipe size for connecting a Super Stor water heater is 1 inch.
The minimum pipe size for connecting a Munchkin boiler is 1.25 inches and 2 inches for the 399M.
All pumps are shown with isolation flanges. The alternative is standard flanges with full port ball valves.
The anti-scald mixing valve is recommended if the DHW temperature is set above the factory setting of 119˚F.
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.
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.
22
Boiler Manual
GAS-FIRED BOILER
Standard Munchkin boiler
Preferred piping (zoning with valves)
Domestic water heating mode
Drawing 2B
OFF
OFF
make-up water
OFF
OFF
zone valves
P2
closely
spaced
tees
differential
pressure
bypass
valve
V1
purging
valves
anti-scald
mixing valve
cold
water
P1
T/P
Munchkin boiler
Super Stor
indirect DHW tank
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
This drawing is meant to show system piping concept only.
Installer is responsible for all equipment & detailing required by local codes.
Adjust differential pressure bypass valve to eliminate any flow velocity noise when zone with highest pressure
drop operates by itself.
The minimum pipe size for connecting a Super Stor water heater is 1 inch.
The minimum pipe size for connecting a Munchkin boiler is 1.25 inches and 2 inches for the 399M.
All pumps are shown with isolation flanges. The alternative is standard flanges with full port ball valves.
The anti-scald mixing valve is recommended if the DHW temperature is set above the factory setting of 119˚F.
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.
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.
23
Boiler Manual
GAS-FIRED BOILER
Standard Munchkin boiler
Preferred piping (zoning with circulators)
Space heating mode
Drawing 2C
space heating zone circuit
zone
circulators
make-up water
closely
spaced
tees
purging
valves
anti-scald
mixing valve
P2
cold
water
P1
T/P
Munchkin boiler
Super Stor
indirect DHW tank
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
This drawing is meant to show system piping concept only.
Installer is responsible for all equipment & detailing required by local codes.
All closely spaced tees shall be within 4 pipe diameter center to center spacing.
A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream
of all closely spaced tees.
The minimum pipe size for connecting a Super Stor water heater is 1 inch.
The minimum pipe size for connecting a Munchkin boiler shall be 1.25 inches and 2 inches for the 399M.
All pumps are shown with isolation flanges. The alternative is standard flanges with full port ball valves.
The anti-scald mixing valve is recommended if the DHW temperature is set above the factory setting of 119˚F.
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.
NOTE: For Vision piping applications, refer to the Vision Installation Piping Diagrams.
24
Boiler Manual
GAS-FIRED BOILER
Standard Munchkin boiler
Preferred piping (zoning with circulators)
Domestic water heating mode
Drawing 2D
space heating zone circuit
zone
circulators
make-up water
closely
spaced
tees
purging
valves
anti-scald
mixing valve
P2
cold
water
P1
T/P
Munchkin boiler
Super Stor
indirect DHW tank
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
This drawing is meant to show system piping concept only.
Installer is responsible for all equipment & detailing required by local codes.
All closely spaced tees shall be within 4 pipe diameter center to center spacing.
A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream
of all closely spaced tees.
The minimum pipe size for connecting a Super Stor water heater is 1 inch.
The minimum pipe size for connecting a Munchkin boiler shall be 1.25 inches and 2 inches for the 399M.
All pumps are shown with isolation flanges. The alternative is standard flanges with full port ball valves.
The anti-scald mixing valve is recommended if the DHW temperature is set above the factory setting of 119˚F.
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.
NOTE: For Vision piping applications, refer to the Vision Installation Piping Diagrams.
25
Boiler Manual
GAS-FIRED BOILER
Standard Munchkin boiler
Preferred piping
(multiple boilers / zoning with circulators)
Space heating mode
Drawing 2E
space heating zone circuit
zone
circulators
make-up water
closely
spaced
tees
purging
valves
anti-scald
mixing valve
cold
water
P2
PB1
T/P
PB2
T/P
Munchkin boiler
Munchkin boiler
Super Stor
indirect DHW tank
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
This drawing is meant to show system piping concept only.
Installer is responsible for all equipment & detailing required by local codes.
All closely spaced tees shall be within 4 pipe diameter center to center spacing.
A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream
of all closely spaced tees.
The minimum pipe size for connecting a Super Stor water heater is 1 inch.
The minimum pipe size for connecting a Munchkin boiler shall be 1.25 inches and 2 inches for the 399M.
All pumps are shown with isolation flanges. The alternative is standard flanges with full port ball valves.
The anti-scald mixing valve is recommended if the DHW temperature is set above the factory setting of 119˚F.
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.
NOTE: For Vision piping applications, refer to the Vision Installation Piping Diagrams.
26
Boiler Manual
GAS-FIRED BOILER
Standard Munchkin boiler
Preferred piping
(multiple boilers / zoning with circulators)
Domestic water heating mode
Drawing 2F
space heating zone circuit
zone
circulators
make-up water
closely
spaced
tees
purging
valves
anti-scald
mixing valve
cold
water
P2
PB1
T/P
PB2
T/P
Munchkin boiler
Munchkin boiler
Super Stor
indirect DHW tank
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
This drawing is meant to show system piping concept only.
Installer is responsible for all equipment & detailing required by local codes.
All closely spaced tees shall be within 4 pipe diameter center to center spacing.
A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream
of all closely spaced tees.
The minimum pipe size for connecting a Super Stor water heater is 1 inch.
The minimum pipe size for connecting a Munchkin boiler shall be 1.25 inches and 2 inches for the 399M.
All pumps are shown with isolation flanges. The alternative is standard flanges with full port ball valves.
The anti-scald mixing valve is recommended if the DHW temperature is set above the factory setting of 119˚F.
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.
NOTE: For Vision piping applications, refer to the Vision Installation Piping Diagrams.
27
Boiler Manual
GAS-FIRED BOILER
D. BOILER PIPING DETAILS WITH THE VISION I SYSTEM
Munchkin VISION 1 system
(zoning with valves)
Space heating mode
Drawing 3A
zone
valves
high limit safety
make-up water
purge
purge
differential
pressure
bypass
valve
anti-scald mixing valve
cold
water
P1
DHW
temperature
sensor
outdoor
temperature
sensor
OFF
T/P
P2
purge
Super Stor
indirect DHW tank
thermal trap
(w/ drain plug)
Munchkin boiler
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
29
This drawing is meant to show system piping concept only.
Installer is responsible for all equipment & detailing required by local codes.
All closely spaced tees shall be within 4 pipe diameter center to center spacing.
A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream
of all closely spaced tees.
The minimum pipe size for connecting a Super Stor water heater is 1 inch.
The minimum pipe size for connecting a Munchkin boiler shall be 1.25 inches and 2 inches for the 399M.
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.
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.
Adjust differential pressure bypass valve to eliminate any flow velocity noise when zone with highest pressure
drop operates by itself.
Boiler Manual
GAS-FIRED BOILER
Munchkin VISION 1 system
(zoning with valves)
Domestic water heating mode
Drawing 3B
zone
valves
high limit safety
OFF
make-up water
purge
purge
differential
pressure
bypass
valve
anti-scald mixing valve
cold
water
OFF
DHW
temperature
sensor
P1
outdoor
temperature
sensor
T/P
P2
purge
Super Stor
indirect DHW tank
thermal trap
(w/ drain plug)
Munchkin boiler
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
This drawing is meant to show system piping concept only.
Installer is responsible for all equipment & detailing required by local codes.
All closely spaced tees shall be within 4 pipe diameter center to center spacing.
A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream
of all closely spaced tees.
The minimum pipe size for connecting a Super Stor water heater is 1 inch.
The minimum pipe size for connecting a Munchkin boiler shall be 1.25 inches and 2 inches for the 399M.
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.
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.
Adjust differential pressure bypass valve to eliminate any flow velocity noise when zone with highest pressure
drop operates by itself.
30
Boiler Manual
GAS-FIRED BOILER
Munchkin VISION 1 system
(zoning with valves)
Space heating mode (w/ submixing)
Drawing 3C
3-way
(manually-set)
mixing valve
vent
low temperature
manifold station
air handler
high limit safety
make-up water
purge
purge
differential
pressure
bypass
valve
balancing
valve
anti-scald
mixing valve
cold
water
DHW
temperature
sensor
P1
outdoor
temperature
sensor
OFF
T/P
P2
purge
Super Stor
indirect DHW tank
thermal trap
(w/ drain plug)
Munchkin boiler
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
31
This drawing is meant to show system piping concept only.
Installer is responsible for all equipment & detailing required by local codes.
All closely spaced tees shall be within 4 pipe diameter center to center spacing.
A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream
of all closely spaced tees.
The minimum pipe size for connecting a Super Stor water heater is 1 inch.
The minimum pipe size for connecting a Munchkin boiler shall be 1.25 inches and 2 inches for the 399M.
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.
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.
Adjust differential pressure bypass valve to eliminate any flow velocity noise when zone with highest pressure
drop operates by itself.
Adjust 3-way manually-set mixing valve to yield proper supply temperature to lower temperature load.
Boiler Manual
GAS-FIRED BOILER
Munchkin VISION 1 system
(zoning with circulators)
Space heating mode
Drawing 4A
make-up water
zone
circulators
high limit safety
make-up water
purge
purge
closely spaced tees
anti-scald mixing valve
cold
water
DHW
temperature
sensor
P1
outdoor
temperature
sensor
OFF
T/P
P2
purge
Super Stor
indirect DHW tank
thermal trap
(w/ drain plug)
Munchkin boiler
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
This drawing is meant to show system piping concept only.
Installer is responsible for all equipment & detailing required by local codes.
All closely spaced tees shall be within 4 pipe diameter center to center spacing.
A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream
of all closely spaced tees.
The minimum pipe size for connecting a Super Stor water heater is 1 inch.
The minimum pipe size for connecting a Munchkin boiler shall be 1.25 inches and 2 inches for the 399M.
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.
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.
32
Boiler Manual
GAS-FIRED BOILER
Munchkin VISION 1 system
(zoning with circulators)
Domestic water heating mode
OFF
OFF
OFF
Drawing 4B
zone
circulators
high limit safety
make-up water
closely spaced tees
purge
purge
anti-scald mixing valve
cold
water
OFF
DHW
temperature
sensor
P1
outdoor
temperature
sensor
T/P
P2
purge
Super Stor
indirect DHW tank
thermal trap
(w/ drain plug)
Munchkin boiler
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
33
This drawing is meant to show system piping concept only.
Installer is responsible for all equipment & detailing required by local codes.
All closely spaced tees shall be within 4 pipe diameter center to center spacing.
A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream
of all closely spaced tees.
The minimum pipe size for connecting a Super Stor water heater is 1 inch.
The minimum pipe size for connecting a Munchkin boiler shall be 1.25 inches and 2 inches for the 399M.
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.
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.
Boiler Manual
GAS-FIRED BOILER
Munchkin VISION 1 system
(zoning with circulators)
Space heating mode (w/ submixing)
Drawing 4C
3-way
(manually-set)
mixing valve
vent
air handler
low temperature
manifold station
high limit safety
make-up water
balancing
valve
purge
purge
anti-scald mixing valve
cold
water
DHW
temperature
sensor
P1
outdoor
temperature
sensor
OFF
T/P
P2
purge
Super Stor
indirect DHW tank
thermal trap
(w/ drain plug)
Munchkin boiler
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
This drawing is meant to show system piping concept only.
Installer is responsible for all equipment & detailing required by local codes.
All closely spaced tees shall be within 4 pipe diameter center to center spacing.
A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream
of all closely spaced tees.
The minimum pipe size for connecting a Super Stor water heater is 1 inch.
The minimum pipe size for connecting a Munchkin boiler shall be 1.25 inches and 2 inches for the 399M.
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.
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.
Adjust 3-way manually-set mixing valve to yield proper supply temperature to lower temperature load.
34
Boiler Manual
GAS-FIRED BOILER
Munchkin VISION 1 system
Drawing 4E
(zoning with circulators)
Space heating mode (3 fully reset supply temperatures)
medium temperature
manifold station
vent
air handler
(higher temp.)
vent
high limit safety
make-up water
low temperature
manifold station
purge
purge
balancing
valves
3-way (manually-set) mixing valve
anti-scald mixing valve
cold
water
P1
DHW
temp.
sensor
outdoor
temperature
sensor
OFF
T/P
P2
purge
Super Stor
indirect DHW tank
thermal trap
(w/ drain plug)
Munchkin boiler
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
35
This drawing is meant to show system piping concept only.
Installer is responsible for all equipment & detailing required by local codes.
All closely spaced tees shall be within 4 pipe diameter center to center spacing.
A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream
of all closely spaced tees.
The minimum pipe size for connecting a Super Stor water heater is 1 inch.
The minimum pipe size for connecting a Munchkin boiler shall be 1.25 inches and 2 inches for the 399M.
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.
Do not use valve actuators on manifolds supplied by manually-set 3-way mixing valves.
A purging valve may be used in lieu of the ball valve / hose bib combination shown.
Adjust 3-way manually-set mixing valve to yield proper supply temperature to lower temperature load.
Boiler Manual
GAS-FIRED BOILER
Munchkin VISION 1 system
Drawing 4F
(zoning with circulators)
Space heating mode (3 different supply temperatures)
3-way manually-set
mixing valve
vent
air handler
(higher temp.)
vent
low temperature
manifold station
high limit safety
variable
speed
injection
mixing
make-up water
purge
purge
balancing
valves
medium
temperature
manifold station
anti-scald
mixing valve
cold
water
purge
P1
DHW
temp.
sensor
outdoor
temperature
sensor
OFF
T/P
P2
purge
Super Stor
indirect DHW tank
thermal trap
(w/ drain plug)
Munchkin boiler
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
This drawing is meant to show system piping concept only.
Installer is responsible for all equipment & detailing required by local codes.
All closely spaced tees shall be within 4 pipe diameter center to center spacing.
A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream
of all closely spaced tees.
The minimum pipe size for connecting a Super Stor water heater is 1 inch.
The minimum pipe size for connecting a Munchkin boiler shall be 1.25 inches and 2 inches for the 399M.
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.
Follow all instructions for installation of injection mixing system.
A purging valve may be used in lieu of the ball valve / hose bib combination shown.
Adjust 3-way manually-set mixing valve to yield proper supply temperature to lower temperature load.
36
Boiler Manual
GAS-FIRED BOILER
Drawing 4G
Munchkin VISION 1 system
Multiple high temperature priority loads controlled with zone valves
high temperature loads
low temperature loads
high limit safety
air handler
purge
multi-zone
relay center
purge
closely spaced tees
anti-scald
mixing valve
OFF
P1
outdoor
temperature
sensor
T/P
P2
purge
differential pressure
bypass valve
Super Stor
indirect DHW tank
thermal trap
(w/ drain plug)
Munchkin heater
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
37
This drawing is meant to show system piping concept only.
Installer is responsible for all equipment & detailing required by local codes.
All closely spaced tees shall be within 4 pipe diameter center to center spacing.
A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream
of all closely spaced tees.
The minimum pipe size for connecting a Super Stor water heater is 1 inch.
The minimum pipe size for connecting a Munchkin boiler shall be 1.25 inches and 2 inches for the 399M.
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.
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.
High temperature loads cannot operate simultaneously with low temperature loads.
Supply water temperature to high temperature loads is not reset based on outdoor temperature.
Domestic water heating is highest priority load, and controlled through priority zone of multi-zone relay center
OFF
OFF
make-up water
OFF
air handler
zone
circulators
Boiler Manual
GAS-FIRED BOILER
Drawing 4H
Munchkin VISION 1 system
Multiple high temperature priority loads
controlled with zone circulators
Multiple low temperature load controls with zone circulators
high temperature loads
low temperature loads
OFF
make-up water
OFF
OFF
air handler
zone
circulators
high limit safety
air handler
purge
multi-zone
relay center
purge
closely spaced tees
anti-scald
mixing valve
OFF
P1
outdoor
temperature
sensor
T/P
P2
purge
Super Stor
indirect DHW tank
thermal trap
(w/ drain plug)
Munchkin heater
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
This drawing is meant to show system piping concept only.
Installer is responsible for all equipment & detailing required by local codes.
All closely spaced tees shall be within 4 pipe diameter center to center spacing.
A minimum of 6 pipe diameters of straight pipe shall be installed upstream and downstream
of all closely spaced tees.
The minimum pipe size for connecting a Super Stor water heater is 1 inch.
The minimum pipe size for connecting a Munchkin boiler shall be 1.25 inches and 2 inches for the 399M.
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.
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.
High temperature loads cannot operate simultaneously with low temperature loads.
Supply water temperature to high temperature loads is not reset based on outdoor temperature.
Domestic water heating is highest priority load, and controlled through priority zone of multi-zone relay center
38