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Boilers intended to be connected to an existing boiler or boiler system shall:
1. Be capable of being installed without interfering with the normal delivery of heated water from the original boiler to the
radiation system.
2. Be capable of being installed to operate as intended without affecting the operation of the electrical and mechanical safety
controls of the original boiler.
3. Provide, upon completion of the installation, for a change over from one fuel to the other without requiring the manual
adjustment of any controls or components other than the thermostats.
4. Be compatible with the operation of a service water-heating coil within the original boiler without bypassing the operation
of the solid-fuel boiler.
5. Have provision for preventing, or adequate water capacity within the boiler to prevent, damage to the boiler from loss of
circulation due to electrical power failure.
6. Be capable of being installed without changing the function of the control or rewiring of the original boiler. A wiring
interconnection is permitted. The electrical system of both boilers shall be powered from a single branch circuit without
exception.
(CAN/CSA-B366.1-M91)
7. Pertaining to CAN/CSA- B365-01, Have a clearly labelled device, located at each entrance to the boiler area, which can
be thrown to discontinue operation to the feed system.
EXAMPLE OF PIPING WITH AN INDEPENDENT CIRCULATOR SYSTEM
CONNECTED TO AN EXISTING OPERATIONAL BOILER
* BOILER DRAIN, 3/4" NPT MALE X 3/4" HOSE
* 3/4" NPT MALE PLUG
RETURN 3/4"
SYSTEM SUPPLY
* AUTOMATIC AIR VENT
* TEMP/PRESSURE
GAUGE
* PRESSURE RELIEF VALVE
PIPE TO WITHIN
6" OF THE
FLOOR OR A
FLOOR DRAIN
UNION
OUT
UNION
SHUT-OFF VALVE
EXISTING
BOILER
UNION
NOTE: NOT SHOWN IN THIS DRAWING ARE ALL OF THE
ASSOCIATED PIPING AND CONTROLS THAT SHOULD
ALREADY BE IN PLACE WITH THE EXISTING BOILER
SYSTEM. FOR EXAMPLE, THE EXPANSION TANK, THE
COLD WATER SUPPLY , AIR REMOVAL SYSTEM ETC... IT IS
EXTREMELY IMPORTANT THAT THIS BOILER BE
INSTALLED BY A QUALIFIED INSTALLER AND THAT ALL
EXISTING CONTROLS AND SAFETY DEVICES ARE
VERIFIED AS OPERATIONAL.
* ITEMS SUPPLIED
NOTE: ALWAYS REFER TO THE INDIVIDUAL COMPONENTS
RECOMMENDED INSTALLATION INSTRUCTIONS FOR THE PROPER
MOUNTING POSITION AND LOCATION WITHIN THE PIPING SYSTEM.
CIRCULATOR
SHUT-OFF
VALVE
SHUT-OFF
VALVE
UNION
SUPPLY 3/4"
SYSTEM RETURN
UNION
IN
BALANCING VALVE
SHUT-OFF VALVE
UNION
CIRCULATOR
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.
Anti-freeze and/or boiler water treatment:
There is no restriction on the type of commercial antifreeze used. When lling the boiler water system, it is recommended
that some form of boiler water treatment be used.