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BYPASS
VALVE
SYSTEM SUPPLY 3/4"
* 3/4" NPT MALE
PLUG
* BOILER DRAIN,
3/4" NPT MALE X
3/4" HOSE
TYPICAL BOILER HOT WATER PIPING SHOWING AIR REMOVAL SYSTEM, PROVISIONS FOR THE
EXPANSION OF WATER AND THE AUTOMATIC COLD WATER SUPPLY. ALSO SHOWN BUT NOT
NECESSARILY NEEDED IS THE BOILER BYPASS LINE. THE NECESSITY OF THIS LINE WILL BE
DETERMINED BY THE INSTALLING CERTIFIED PLUMBER OR HVAC CONTRACTOR.
SHUT-OFF
VALVE
* AUTOMATIC AIR VENT
PIPE TO WITHIN
6" OF THE FLOOR
OR A FLOOR
DRAIN
UNION
* PRESSURE RELIEF VALVE
* TEMP/PRESSURE
GAUGE
SHUT-OFF VALVE
UNION
SHUT-OFF
VALVE
NOTE: ALWAYS REFER TO THE INDIVIDUAL COMPONENTS
RECOMMENDED INSTALLATION INSTRUCTIONS FOR THE PROPER
MOUNTING POSITION AND LOCATION WITHIN THE PIPING SYSTEM.
** THERMOMETER
PRESSURE REDUCING
VALVE (PRV) OR
COMBINATION PRV AND
RELIEF VALVE
EXPANSION TANK
(DIAPHRAGM TYPE)
SYSTEM RETURN 3/4"
3/4" BOILER
BYPASS LINE (IF
REQUIRED)
* ITEMS SUPPLIED
** OPTIONAL
CHECK VALVE (OR
BACKFLOW
PREVENTER IF
REQUIRED)
** THERMOMETER
AIR VENT
AIR SCOOP
SYSTEM SUPPLY 3/4"
COLD
WATER
SUPPLY 1/2"
NOTICE: When installing with the Atmospheric Conversion, all of the pressurized system
components shown are not necessary. Air vents or bleeders should be removed from the
plumbing system to prevent air from entering the lines. Control dipswitch #6 must be “ON”.
NOTE: Cold return water temperature (Sustained temperatures below 140 degrees
Fahrenheit) will lead to condensation or moisture in the firebox. This moisture can
lead to creosote formation. To help minimize moisture and creosote, it is strongly
recommended that some method of temperature balance is incorporated into the
return system.
EXAMPLE OF A TYPICAL MULTI-ZONE HEATING SYSTEM WITH BOILER BYPASS AND INDIRECT
DOMESTIC HOT WATER ZONE
SHUT-OFF VALVE
* 3/4" NPT MALE PLUG
* BOILER DRAIN, 3/4" NPT MALE X
3/4" HOSE
PIPE TO WITHIN 6" OF THE FLOOR OR A
FLOOR DRAIN
UNION
* AUTOMATIC AIR VENT
SYSTEM SUPPLY 3/4"
* TEMP/PRESSURE
GAUGE
* PRESSURE RELIEF VALVE
SHUT-OFF VALVE
UNION
DOMESTIC HOT
WATER STORAGE
HEATER WITH
INTERNAL HEAT
EXCHANGER
RETURN WATER
CHECK VALVE
OUT
IN
** THERMOMETER
SYSTEM RETURN 3/4"
** OPTIONAL
* ITEMS SUPPLIED
BOILER BYPASS CAN ALSO BE DONE WITH A 3-WAY
MIXING VALVE AND CAN BE CONTROLLED MANUALLY
OR WITH AN AUTOMATIC ACTUATING MOTOR. IF SO,
THE TWO BALANCING VALVES ARE NOT NEEDED
NOTE: ALWAYS REFER TO THE INDIVIDUAL COMPONENTS
RECOMMENDED INSTALLATION INSTRUCTIONS FOR THE PROPER
MOUNTING POSITION AND LOCATION WITHIN THE PIPING SYSTEM.
BALANCING VALVE
CHECK VALVE
EXPANSION TANK, AIR REMOVAL AND COLD WATER SUPPLY
CIRCULATOR
HOT
COLD
** THERMOMETER
SYSTEM SUPPLY 3/4"
BYPASS (BALANCING) VALVE
BOILER WATER
SUPPLY WATER
NOTICE: When installing with the Atmospheric Conversion, all of the pressurized
system components shown are not necessary. Air vents or bleeders should be
removed from the plumbing system to prevent air from entering the lines.
Control dipswitch #6 must be “ON”.
NOTE: Cold return water temperature (Sustained temperatures below 140 degrees
Fahrenheit) will lead to condensation or moisture in the firebox. This moisture can
lead to creosote formation. To help minimize moisture and creosote, it is strongly
recommended that some method of temperature balance is incorporated into the
return system.