Northern Stoker 30-30 Owner's Manual - Connecting To An Existing
5
EXISTING BOILER SYSTEM:
There are a number of ways to connect a Northern Stoker to an existing Hot Water System. Each depends on
the design of what is currently in place. It is strongly advised to have a certified technician to do this
type of install.
If you choose to do this yourself, observe the following guidelines:
The add-on boiler shall:
i. be installed without interfering with the normal delivery of heated water from the original boiler,
ii. be installed without affecting the operation of the electrical and mechanical safety controls of the
original boiler,
iii. provide for a changeover for one fuel to the other without requiring manual adjustment of any
controls or components other than the thermostats.
iv. have provisions for preventing, or adequate water capacity within the boiler to prevent damage from
loss of circulation due to electrical power failure.
v. be installed without changing the function of the controls or rewiring the original boiler. A wiring
interconnection is permitted. The electrical system of both boilers shall be powered from a
single branch circuit without exception.
1. OPERATE THE (GAS, OIL, ELECTRIC) BOILER PERIODICALLY TO ENSURE
THAT IT WILL OPERATE SATISFACTORILY WHEN NEEDED.
2. DO NOT RELOCATE OR BYPASS ANY OF THE SAFETY CONTROLS IN THE ORIGINAL
(GAS, OIL, ELECTRIC) BOILER INSTALLATION.
3. CAUTION: THIS EQUIPMENT MAY ONLY BE INSTALLED BY QUALIFIED
PERSONNEL.
4. DISCONNECT ELECTRIC POWER TO BOTH BOILERS BEFORE SERVICING
5. CAUTION: MAINTAIN COMBUSTION AIR SUPPLY TO BOTH BOILERS. AIR
STARVATION IS DANGEROUS. PROVIDE A FRESH AIR OPENING AT LEAST 2,000
MM
2
(3 IN
2
).
6. THE OPERATION OF THE GAS BOILER MUST BE VERIFIED FOR ACCEPTABLE
OPERATION BEFORE AND AFTER INSTALLATION OF THE ADD ON APPLICA NCE
BY A GAS FITTER WHO IS RECOGNIZED BY THE REGULATORY AUTHORITY.
The installation should comply with requirements of CAN/USA-B365, and changes to the installation
should comply with CSA B139 (for oil fired), C22.1 (for electric), or CAN/CGA-B149. 1 or CAN/CGA-
B149.2 (for gas fired).
CIRCULATOR PUMP:
Connecting to an Existing
Boiler
Note: Once again, we stress that this is a job for a certified technician.
Important! The circulator must always be on, even in the off season (24 hours per month). In the
event of a power failure, connect the furnace to a backup generator. Contact your Northern
Stoker dealer if unit has failed and is in need of repair or replacement. If you hear a hissing
sound from the pump, air has entered the system and can damage the pump.