Granby B*C-3 sections Setup guide

Installation, Operation and
Service Manual
Cast Iron Boiler SERIES
* *
*Designates Brand Name
B*C, 3 sections illustraded
INSTALLATIONS MUST MEET ALL LOCAL AND FEDERAL
CODES THAT MAY DIFFER FROM THIS MANUAL
Please read the manual in its entirety before beginning installation.
This manual must be kept with the boiler for future reference.
GRANBY FURNACES INC.
PO Box 637
12118 Hwy 209
Parrsboro Nova Scotia Canada
B0M 1S0
www.granbyindustries.com 30-10-2015 G2012-E5 Rev. D
B*
C
-
3
sections
B*C-4 sections
B*C-5 sections
B*C-6 sections
B*C-7 sections
B*C-8 sections

1
TABLE OF CONTENTS
B*C – Oil
1.0 IMPORTANT SAFETY ADVICE 2
2.0 PRODUCT INFORMATION 3
3.0 UNIT INSTALLATION 4
3.1 PLACEMENT & LEVELING OF THE UNIT 4
3.2 JACKET ASSEMBLY & CONTROL INSTALLATION 4
4.0 PIPING 8
5.0 ELECTRIC WIRING 11
6.0 CHIMNEY INFORMATION 13
7.0 FUEL SYSTEM 14
8.0 ACCESSORY INSTALLATION 15
9.0 BURNER INSTALLATION & SETTING 16
10.0 TECHNICAL INFORMATION 20
11.0 BOILER START UP & OPERATION 21
11.1 START-UP PROCEDURE 21
11.2 L7248 HONEYWELL AQUASTAT 22
11.3 FUEL SMART HYDROSTAT 3250 BOILER CONTROL 23
12.0 MAINTENANCE AND SERVICE 26
12.1 CLEANING THE BOILER 27
12.2 BURNER NOTES 27
12.3 PERFORMING COMBUSTION TEST 27
13.0 EXPLODED PARTS VIEW 28
14.0 START UP TEST RESULTS 30

2
1.0 IMPORTANT SAFETY ADVICE
Please read and understand this manual before installing, operating or
servicing the boiler. To ensure you have a clear understanding of the operating
procedures of the appliance please take the time to read section IMPORTANT
SAFETY ADVICE of this manual.
CAUTION
DO NOT START THE BURNER UNTIL ALL FITTINGS, COVERS AND DOORS
ARE IN PLACE. DO NOT TAMPER WITH THE BOILER OR CONTROLS, CALL
A QUALIFIED BURNER TECHNICIAN. DO NOT STORE OR USE GASOLINE
OR OTHER FLAMMABLE VAPOURS AND LIQUIDS IN THE VICINITY OF THIS
UNIT OR ANY OTHER APPLIANCE.
IMPORTANT
This manual contains instructional and operational information for the B*C OIL-
FIRED Boiler. Read the instructions thoroughly before installing boiler or starting
the burner. Consult local authorities about your local FIRE SAFETY
REGULATIONS. All installations must be in accordance with local state or
provincial codes. Improper installation will result in voiding of warranty.

3
2.0 PRODUCT INFORMATION
PHYSICAL DIMENSIONS
Length : ( 3 sections 18 7/8 ‘’ ) ( 4 sections 22 1/2’’ ) ( 5 sections 26 ¼’’ )
( 6 sections 31 1/8’’ ) ( 7 sections 35 ½’’) ( 8 sections 39 ¼’’)
CLEARANCE
Proper clearances must be maintained not only from combustible materials but also to provide
adequate access for servicing. All installations must comply with local codes and CSA B139.
Consult local fire codes for required clearances. Connections to chimney must be made with
the proper gauge thickness and diameter of fluepipe as required by CSA B139.
CLEARANCE (minimum) FOR SERVICING
Front 24” (609 mm)
Rear 24” (609 mm)
Left Side 24” (609 mm)
Right Side 2” (50.8 mm)
Top 10” (254 mm)
CLEARANCE (minimum) TO COMBUSTIBLES
Top 10” (254 mm)
Front 24” (609 mm)
Rear 24” (609 mm)
Left Side 24” (609 mm)
Right Side 2” (50.8 mm)
Chimney Connector 9” (229 mm)
DRAFT PRESSURE
Breech draft pressure 0.03’’ w.c. draft required

4
FLUE PIPE CONNECTION
CHIMNEY or Direct Vent System DVS Granby kit (3, 4, 5 sections)
CLEANOUTS
Rear removable smoke hood cover & Combustion Front Door Opening
FUEL
Not heavier than No.2 fuel oil
ELECTRICAL
CANADA:120 Volts, 60Hz, 15 amps. fuse or breaker
USA: 13.3A, circuit protection 20A,
AIR SUPPLY
CAUTION: Adequate air supply for both combustion and ventilation must be available.
See page 14 for details.
3.0 Unit installation
3.1 PLACEMENT & LEVELING OF THE UNIT
The boiler should be located on firm foundation in an easily accessible area that meets the
previously discussed clearances and air requirements. In situations where the floor may be
uneven the G*C may be level by using the leg levelers provided on the boiler or through the
insertion of shims under the legs.
3.2 JACKET ASSEMBLY AND CONTROL INSTALLATION
The boiler jacket has been designed for ease of assembly and removal. The following step by
step process will ease installation. A screw driver, 17mm socket and ratchet or a 17mm
wrench or adjustable wrench are needed.
Adj stable
Leg Leveler
Rail

5
STEP 1: VERIFY CONTENTS OF JACKET ASSEMBLY PACKAGE.
Your jacket assembly will contain two (2) manifolds with gaskets, a
fastening package which includes all necessary bolts, screws, nuts
and washers for assembly along with burner studs, nuts and
washers, block insulation, rear of block insulation, aluminum faced
tape, leveling frame rails, two (2) side panels, a rear panel top
panel and re-insulated top and bottom front panels.
STEP 2: FRAME RAIL CONNECTION
Attach 10 mm bolts to the underside of the frame rails. These will be used to level the boiler. Screw
the 4 mm jacket affixing screw to the frame rail from the top down. Both the bolt and affixing screw will
be located on the same end of the frame rail. The frame rail will then be bolted to the legs of the boiler
with the frame rail and containing the affixing screw facing in the direction of the front end of the boiler.
STEP 3: MANIFOLD INSTALLATION
Using the gaskets and bolts supplied connect the manifolds directly to the boiler block. The
top supply manifold will have a 3/4” npt tapping for a relief valve and 1/4” npt tapping for a
gauge. The bottom return manifold has 3/4” npt tapping for a drain vlave. Both manifolds have
1-1/4” male npt threads for sytem connection .

6
STEP 4: INSULATION INSTALLATION
Drape the large piece of block insulation directly over the block taking care to provide adequate
clearance from frame rails. Using the aluminum faced tape attach the preshaped rear
inslulation to the block insulation. The process is simply taping the two pieces together. The
front panels come pre-insulated.
STEP 5: SIDE AND BACK PANEL ATTACHMENT
Affix panel mounting nuts to the rear of the tie rods. Mount the side panels by placing the
panel over the frame rail so that the hole in the bottom lip of the panel fits directly over the
jacket affixing screw on the rail. You can then lock the panel in place by sliding it slightly
forward. The slot on the rear of the panel will now be in position to slide over the tie rod at the
rear of the boiler. Tighten the nuts on the tie rod end to firmly secure the panel. Repeat on the
other side. Screw the back panel to the side panels.

7
STEP 6: CONTROL SENSOR ATTACHMENT
Prior to jacket top and front panel installation the control sensor must be inserted into the brass
well located on the top of the boiler and secured by a clip. Feed the sensor through the hole
on the front of the right side panel from the outside. Penetrate the block insulation to insert the
sensor. The sensor must be fully inserted to the bottom of the well.
STEP 7: TOP AND FRONT PANEL ATTACHMENT
Affix the top panel by placing the holes located on the underside of the panel over the jacket
affixing pins. Press down on the top panel and it will snap in place. Affix the lower front panel
by placing the openings on the lips of the panel over the jacket affixing screws and pushing
downward on the panel. The panel will lock in place. Repeat the process for the top front
panel.
Manual
Air Vent

8
Upon completion of the jacket assembly the control unit can be mounted on the side of
the boiler.
Honeywell L7248 Aquastat or Fuel Smart HydroStat 3250 boiler control.
B*C-3 sections boiler illustrated
The boiler is now ready for piping and connection to the fuel system, heating and
domestic hot water, thermostat and 110 Volt 60 cycle AC current.
CAUTION: Safety or relief valve discharge should be piped downward to within
6” of the floor or to a drain. The valve must be mounted in a vertical position.
4.0 PIPING
Prior to connecting the B*C to an existing piping system certain procedures must be followed.
The system should be flushed to insure that scale and sludge will not be introduced to the
boiler. This is a must when replacing a gravity open system.
The B*C is a low mass boiler requiring low water content and steps must be taken to insure
that the boiler is not flooded from an existing high volume standing cast iron system. If the
conversion is from a high volume system a bypass loop must be installed.
Manual shut off valves must be installed on both the supply line and on the boiler bypass
loop. ASME Boiler Code requires that feed or make up water be introduced to the piping
system and not directly to the boiler. Pressure reducing valves should be installed and
adjusted to 12 psi cold water. The pressure relief valve must be piped from the boiler and
downward to within 6” of the floor or to a height to meet existing code. An expansion tank,
circulating pump and automatic air eliminators must be part of the system. The relief valve,
backflow preventer and drain valve should be piped according to code to a drain with piping
that is the same size as the relief valve.
All piping, including heating, domestic hot water and fuel lines must be done in accordance
with all local codes. It is suggested that you refer to the Water Installation Survey and
Hydronic Institute Residential Hydronic Heating Installation/Design Guide. All piping must be
properly sized, free from defect and be made of copper, steel, brass, aluminum or PEX.

9
Circulation Pump
A calculation for proper pump selection must be performed for all installations. The pump(s)
should not be operated at maximum working pressures above 30 psi or maximum working
temperatures above 200°F and within limits advised by the manufacturer. The pump must not
be operated unless the system has been bled of all air and completely filled with water.
Recommended locations for the circulator, expansion tank, relief valve and other trim
are shown in Figure 1, Figure 2, Figure 3 and Figure 4.
Figure 1
A typical installation with no domestic hot water and no by-pass loop
installed.

10
Figure 2
A typical installation with no domestic hot water and with a by-pass loop
installed.
Figure 3
A typical installation with domestic hot water supplied by an indirect heater
and with no by-pass loop installed.

11
Figure 4
A typical installation with domestic hot water supplied by an indirect heater
and with a by-pass loop installed.
5.0 ELECTRICAL WIRING
All external wiring must be performed in compliance with existing electrical codes within the
local jurisdiction. In Canada the CSA, STANDARD C22-1 and the Canadian Electrical Code.
Connections should be carried out in accordance with this manual and only by qualified
individuals.
•The boiler and burner should only be operated on 120 Vac.
•Field connections should be properly sized and protected with a minimum 15A fuse or
circuit breaker.
•A separate fused disconnect must be installed as required by code so that power can be
shut off for servicing.
•The boiler must be ground to the water piping or the main service ground.
The connections must be made in a manner to insure that there is no crossing of the neutral
with the phase, a proper ground is provided and all three wires are connected to the operating
control.

12
Typical wiring for line voltage oil burner with Honeywell L7248 and one
heating zone.
Typical wiring for line voltage oil burner with Fuel Smart HydroStat 3250
and one heating zone
Insert sensor ALL THE WAY into well through the knockout (A or B) you have chosen
WARNING
For Canadian application, see page 15 & 16 for proper wiring
with a Block Vent Shut-Off
T T

13
6.0 CHIMNEY INFORMATION
Natural Draft Applications
CAUTION: Oil fired units must always be connected to flues with proper draft.
Specific guidelines should be followed to prevent the occurrence of the following conditions:
•Reverse flow of flue gas during or after burner shutdown.
•Positive outlet draft conditions.
•Condensation of flue gasses
Chimney Connection
To insure safe and efficient boiler operation flue gasses must be released through a clean,
properly sized chimney with adequate draft that meets all local codes and regulations and be in
accordance with CSA B139. Always inspect and clean the chimney to insure that it is free from
obstructions. Never connect the boiler to a chimney or liner serving an open fireplace.
A 6” diameter flue pipe must be used for connection of the boiler flue outlet to the chimney for
the entire length of the connection. An exception can be made for the three, four and five
section boilers where the flue pipe may be reduced to 5” for the length of the connection. The
chimney connector should be at least 24-gauge metal, be properly supported and be free of as
many 90 degree turns as possible. The distance between the boiler and the chimney depends
on whether or not elbows are used. The distance should be at least 24” if no elbows are used
and 12” if elbows are used. The same holds true for the maximum length of the flue pipe. It
must be no longer than 10’ if no elbows are used and 6’ if elbows are used.
Condensation
The B*C Series boiler is a high efficiency boiler and as a result improper venting can lead to
condensing temperatures in the chimney connector and the venting system. If condensing
temperatures of below 250°F NET are reached in the chimney connector, then additional steps
to insure proper draft must be taken. Make sure that all joints are properly sealed with a high
temperature silicone or mastic. If after sealing the joints the condition still exists, then inspect
the chimney for suitability. If the masonry, brick, block chimney or tile chimney liner is in poor
condition a new chimney liner rated for oil may have to be installed. In the event the condition
still exists after installation of a new liner consult Granby Industries.

14
7.0 FUEL SYSTEM
The fuel system piping must comply with the pump manufacturers’ specifications which are
included with the burner. In addition, all fuel system piping must comply with local codes and
ordinances.
•The quality of your fuel oil is of great importance. For most instances your burner is
designed to burn clean water free #2 fuel oil.
• The oil supply line should be constructed of seamless heavy wall copper tubing with flared
fittings. Only oil resistant pipe dope should be used on threaded connections. The use of
Teflon Tape will void manufacturers’ warranty. Lines must be airtight, clean and free of
kinks. All joints and threaded fittings must be checked for leaks. A vacuum gauge should be
employed when testing the installation. It is recommended that older fuel lines be replaced.
•A two pipe system should only be used when the oil supply is well below the pump. A return fuel
line may be used on inside installations where the tank level is below the level of the burner. The
return line must be equal in diameter to the suction line. The minimum size for the oil line is 3/8”
copper tubing.
•A oil de-aerator is recommended when the oil supply line is located 5’ below the burner.
•Shut off valves must be installed in the supply line at or near the oil storage tank and at the burner
in compliance with all codes. Inspect the shut off valve spindle packing for tightness to insure that
there are no air leaks. The valve must always be shut off if the burner is shut down for an extended
period of time. The burner should be tagged to indicate that the fuel supply has been closed off.
The electrical circuit to the burner must be cut off by removing the fuse or circuit breaker to insure
that no operation of the burner will occur while the fuel supply is shut off.
•Only fuel storage tanks bearing the Underwriters Laboratories label and accessories approved as
prescribed by local code may be used.
REAR FLUE BOILER ILLUSTRATION
Draft
reg lator

15
OIL TANK AND PIPING
COMBUSTION & VENTILATION AIR
Install openings and ductwork to the boiler room providing fresh out-side combustion
and circulating air, as installation code require by Canada CSA B139. If installed in a
closed room, provide two free air ventilation openings of at least 8’’ x 12’’ (96 sq in.) free
flow areas near celling and floor. Oil burners must have sufficient air to allow vent
system to operate properly.
8.0 ACCESSORY INSTALLATION
BLOCKED VENT SWITCH (BVSO) FOR CANADIAN APPLICATION ONLY
Oil-fired appliances installed in Canada require a blocked vent switch system when installed on
a chimney. A safety switch is included with the boiler to perform this function. It is the
installer’s responsibility to install the switch in accordance with the instructions provided. Not
applicable for Direct Vent systems. Field Controls Model: WMO-1 (Manual Reset)
Switch Operation
Blocked vent switches are flue gas safety devices for detecting spillage of flue gases due to a
blocked flue or inadequate draft. After detecting a problem, the switch de-energizes the
system’s burner control.
NEVER reset the switch unless the cause of the blockage has been corrected.
Installation (Figure 1)
1) Drill a 5/8” hole in to the flue vent pipe near the appliance breech connection.
2) This hole must be before the draft regulator, vertically or horizontally.
3) Remove one of the securing nuts from the threaded tube of the safety switch.
4) Tighten the other securing nut onto the pipe as far as possible.
5) Insert the threaded tube end into the pierced hole of the flue vent pipe.
6) Install the securing nut on the safety switch tube, which protrudes into the flue vent pipe.
Tighten the nut securely.
Figure 1- Illustration Granby Industries Figure 2- BVSO wiring diagram with L7248
Aquastat

16
Figure 3- BVSO wiring diagram with Fuel Smart HydroStat 3250 control
Wiring BVSO (Figure 2 or figure 3)
Caution: Disconnect the electrical power when wiring the unit.
Wire the blocked vent switch in accordance with The National Electrical Code and applicable
local codes. Wire the safety switch (BVSO) in series with the thermostat and the boiler control
control (Figure 2).
System Test Procedure (BVSO)
1) With the power re-established, block the chimney or vent pipe downstream of the switch.
2) Adjust the thermostat to call for heat.
3) Once the heating system has started the blocked vent switch should shut down the burner
within 10 minutes or sooner.
4) Once the system has cooled, the blocked vent switch can manually be reset.
5) This procedure should be tested a second time.
6) After testing the blocked vent switch the chimney should be cleared of obstruction and the
heating system should be tested over a long run cycle.
If the block vent switch shuts down the system, check to ensure there is enough draft in the
chimney and venting pipes.
9.0 BURNER INSTALLATION AND SETTING
ASSEMBLY & INSTALLATION OF BURNER
ASSEMBLY Check that the burner model is correct for boiler rating required.
Assemble as per burner manufacturer’s instructions.
Ther ostat

17
SELECT NOZZLE Select oil input, nozzle and burner configuration as shown on boiler
operating decal.
INSTALL NOZZLE Install selected nozzle, check for clean seating and tighten in nozzle
adaptor.
ELECTRODES See burner manufacturer’s instructions for correct setting
INSERTION
MOUNT BURNER Tighten top nut first so burner tips down
slightly. The burner is always installed in
an upright position by four (4) nuts.
PUMP BY-PASS For one pipe system factory setting (no
PLUG plug).
SET BURNER FOR EFFICIENT OPERATION
BURNER SETTING Use burner settings in the table on page 20 or operating decal as a
guide to set burner, particularly for nozzle changes. Those settings
are only starting points for the adjustments and are not meant as
final settings.
PUMP PRESSURE Refer to the table on page 20 or operating decal.
AIR SETTING Use air settings on page 20 as a guide to set air adjustment. Those
settings are only starting points for the adjustments and are not
meant as final settings.
DRAFT REGULATOR The draft regulator should be installed at least 3 flue pipe diameter
from breeching or elbow of the furnace.

18
SAMPLING HOLE On smoke/vent pipe, drill a 3/8” round opening. The hole should be at
least 2 flue pipe diameter from breeching or elbow of the boiler.
REAR FLUE BOILER ILLUSTRATION
DRAFT PRESSURE Using an accurate draft meter; adjust the draft control to obtain -0.03”
w.c. draft pressure at the breech sampling hole. The draft regulator’s
adjustments should be made after boiler has been running under
heating mode for at least 5 minutes
All your tests must be done with the burner cover on
COMBUSTION After 10 minutes of normal operation, take a smoke test and adjust
SETTING/ the burner to obtain a reading of “1” on the smoke scale.
EFFICIENCY
To reach the maximum smoke test
value, a 10 full slow steady pump
action is required.

19
1. Take a CO2 test and note the result
18 full slow
steady pump action
2. Open the air band adjustment on the burner
to reduce your CO2 reading by 1%
You now have a perfect “slight trace” of smoke.
Relation between % of CO
2
and O
2
CO
2
(%) O
2
(%) Excess Air (%)
13.5 2.6 15.0
13.0 3.3 20.0
12.5 4.0 25.0
12.0 4.6 30.0
11.5 5.3 35.0
11.0 6.0 40.0
CO2 test can be done mechanically or electronically