Granby B*C-3, B*C-4, B*C-5, B*C-8, B*C-6 Installation, Operation And Service Manual

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 OIL­FIRED 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.

Adjustable

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
regulator

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.

Thermostat

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 CO2 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

20

10.0 TECHNICAL INFORMATION

B*C Cast Iron Boiler specifications

Riello Burner 40 F3 40 F5 40 F10

Unit Model

B*C – E6-0085-** B*C – E7-0121-** B*C –E7-0152-** B*C – E7-0174-** B*C – E8-0194-** B*C – E8-0224-**

Number of sections

3 SECTIONS

4 SECTIONS

5 SECTIONS

6 SECTIONS

7 SECTIONS

8 SECTIONS

Firing Rate (USGPH)

0,60

0.80 1,25 1.39

1.60

1.80

Input (BTU/h)

84,000 112,000 175,000 194,000 224,000 252,000

Output (BTU/h)

73,000 98,000 152,000 167,000 195,000 222,000

Nozzle

0,50 70B 0,65 60B 1,00 60W 1.10 60W 1.35 45B 1.50 45B

Pump Pressure (psi)

160 145 160 160 145 145

Turbulator Setting

0 1 3 2 1 2

Air Gate Adjustment

3.2 2.8 3.0 4.8 3.0 3.0

Energy Star Approved

YES YES YES YES YES YES

AFUE (%)

87.4

87.4 87.3 87.1

87.4 87.5

CO2 (%)

13 13 13 13 13 13

(*)

In the Unit Model number, is specific information of the product for administration only.

** = 3H for Honeywell control L7248 (high limit only, cold start application)
** = 3L for Fuel Smart HydroStat 3250 (high limit cold start operation or low limit operation)

GRANBY B*C CAST IRON SERIES

Appliance

Model

No. de

section

Length

(inches)

Shipping

weight

(lbs)

Water

Content

(gal.)

Supply Outlet

(inches)

Return Outlet

(inches)

B*C – E6-0085-**

3 18-7/8" 370 5.5 1-1/4" 1-1/4"

B*C – E7-0121-**

4 22-1/2" 437 6.9 1-1/4" 1-1/4"

B*C –E7-0152-**

5 26-3/4" 503 8.2 1-1/4" 1-1/4"

B*C – E7-0174-**

6 31-1/8" 569 9.5 1-1/4" 1-1/4"

B*C – E8-0194-**

7 35-1/2" 639 10.8 1-1/4" 1-1/4"

B*C – E8-0224-**

8 39-3/4" 705 12.2 1-1/4" 1-1/4"

WARNING: Do not operate if any controls have been submerged. Contact a
qualified technician for inspection prior to use.

21

11.0 BOILER START UP AND OPERATION

11.1 START UP PROCEDURE

• Prior to start up make sure the service switch is in the OFF position.

• Check all fittings and wiring.

• Insure that the boiler and the entire heating system are completely filled with water and that

all air has been purged from the system resulting that proper system pressure is achieved.
The minimum PSIG is 12.

• Check to insure that clean quality #2 heating oil has been used to fill your storage tank.

• Open all manual shutoffs throughout the system.

• Set operating controls to the recommended settings.

• Follow the manufacturer’s instructions for proper light off and setting. Using accurate

combustion test equipment set the burner for proper “steady state” operation. The use of
accurate instruments is necessary to achieve maximum efficiency and lowest fuel costs.

• Adjust the thermostat to manufacturer’s instruction

• Place this manual, the control manual and the burner manual along with related consumer

information in an easily accessible location. Installers should make the consumer aware of
the content and location of this information.

11.2 Honeywell L7248 Aquastat

Adjusting Settings

To discourage unauthorized changing of Aquastat
settings, a procedure to enter the ADJUSTMENT
mode is required.

To enter the ADJUSTMENT mode, press the UP,
DOWN and I button simultaneously for three seconds.
Press the I button until the feature requiring
adjustment is displayed.

Then press the UP and/or DOWN buttons to move
the set point to the desired value. After 60 seconds
without any button inputs, the control will
automatically return to the RUN mode and lock the
setting.

22

TROUBLE SHOOTING THE HONEYWELL L7248 AQUASTAT

When attempting to diagnose system performance, reference to the LED display can help to
identify specific areas not working properly. The LED display will scroll ERR, followed by a
digit (1-8). Refer to the information inside the cover of the control L7248.

Error Codes

Err 1 Sensor fault Check sensor
Err 2 ECOM fault Check Optional EnviraCOM wiring
Err 3 Hardware fault Replace control
Err 4 B1 fault Check B1 wiring/voltage
Err 5 Low line Check L1 - L2 > 110 V a/c
Err 6 Fuse Check ECOM wires, replace fuse
Err 7 EEPROM Reset limit values
Err 8 Multiple Err 4 Press/Hold



I for 60 sec min*

System

Condition

Diagnostic

Condition

Check Action

Boiler is cold,
house is cold.

Display is OFF 120 V a/c System power. Turn system power on

Display is ON 24 V a/c T-T No 24 V; replace control

24V present; disconnect
thermostat, short T-T

Boiler starts, check wiring and thermostat.

120 V a/c at B1-B2

.

If no, replace control.

. If yes, check burner and wiring.

Boiler is not,
house is cold.

Display is ON. 120 V a/c at C1-C2

.

120 V a/c at C1-C2, check wiring to

pump. Wiring OK,

is pump running ?

. If not, replace the pump.
. If pump is running, check for trapped air

or closed zone valves.

TESTING SAFETY AND CONTROL DEVICES

In the event the boiler is equipped with a low water cut off, the cut off should be tested in
accordance with the manufacturer’s recommendations. When no instructions are available
follow the guidelines in ASME CSD-1 or perform the following procedures:

• Set room thermostat at least 10°F above room temperature.

• With burner operating, drain boiler slowly until the burner shuts off. This shut off should

occur when the water level falls below the low water cut off probe.

• Check to be sure the burner shut off is not due to an open limit or flame safety issue.

• Reset the room thermostat to the desired temperature and refill the boiler

23

11.3 HydroStat 3250 Control

Setting the control

LED LEGEND

and TEST / SETTING BUTTON

ZONE/Indirect switch

DIAGNOSTIC LEDs

and Test Button

(B

) JUMPER

Indicator Light

Heat Call

(A)

High temp. limit setting

100F-220F
Factory set at 190F

(D

) Economy Dial

(OFF or

LO, 1, 2, 3, 4, 5 and HI

(C)

Low Temperature Limit

Setting (OFF or 110F-200F
Factory OFF

DYNAMIC DISPLAY

Temperature / Setting

Thermostat

T T

24

25

Trouble Shouting the HydroStat 3250

26

12.0 MAINTENANCE / SERVICE

Your heating appliance is designed to be maintained and serviced only by your heating
professional. The following sections provide information on maintenance and service
related activities. In the event a problem occurs consult your heating professional.

• In addition to higher efficiencies the B*C Boiler feature

removable baffles

CONDENSATION
If you have condensation in your chimney, make sure that the chimney size is according
to the tables in CSA B139. The temperature at the entrance of the chimney can be
increased by insulating the flue-pipe between the furnace and the chimney base. If this
is not sufficient, consider cutting or removing some flue baffles in the furnace. BE
AWARE THAT REMOVING BAFFLES REDUCES THE UNIT EFFICIENCY AND A
MODIFIED UNIT IS NO LONGER ENERGY STAR APPROVED.

HOMEOWNER SERVICE CAUTION

In the event of a problem with the heating system the homeowner should perform the following
limited activities.

• Check to make sure that there is fuel in the tank and that oil valves are open.

• Set the thermostat above existing room temperature.

• Check for blown fuses or circuit breakers and make sure power switches are in an on

position.

• NEVER TAMPER WITH CONTROLS, WIRING OR PIPING!

Model

# Of Baffles

2

nd

Pass 3rd Pass

3 Sections

4 X X

4 Sections

4 X X

5 Sections

2

X

6 Sections

2

X

7 Sections

2

X

8 Sections

2

X

27

12.1 CLEANING THE BOILER

Section cleaning should only be performed by a service technician and must only be performed
when the boiler is out of service. The following steps should be followed:

• Remove the 2 front panels by sliding it upwards to release and then pull to remove.

•

Open the front swing door by removing the four bolts; this will expose the chamber area as

well as the second and third passes.

(A)

•

Remove the stainless steel baffles. With a cleaning brush clean the boiler section, second

and third passes

. (B)

•

Remove insulation and the smoke hood cleaning access door from the rear section.

Remove any soot that may have collected in the smoke hood

. (C)

Baffles

cleaning

C access

door

A B C

• Replace insulation on the rear section and smoke hood.

• Replace swing door and tighten bolts.

• Refit the front casing.

12.2 BURNER NOTES

Your burner manufacturer has supplied instructions for servicing and maintenance should be
performed as instructed. In addition, the following fuel and related items should be serviced on
a regular basis:

• Service fuel filters and fuel unit.

• Service burner housing and fan.

• Replace nozzle using only the size and type recommended by the boiler manufacturer.

• Service ignition system.

• Perform testing and check for proper operation of the primary control.

12.3 PERFORM COMBUSTION TEST

The burner must be adjusted to insure proper CO2 levels with no more than a slight trace of
Smoke. Continue adjustments until the proper level is achieved. See page 18, 19 and 20.

28

13.0 EXPLODED PARTS VIEW

Exploded Parts View

29

Part List

1 G*C FRONT SECTION 60 GC PNA - POCKET FOR SENSING BULBS

2 G*C INTERMEDIATE SECTION 67 TAPPING WITH AIR RELIEF VALVE
3 G*C REAR SECTION 68 REAR CASING
4 NIPPLE 83 SPECIAL PIN FOR CASING ASSEMBLY
5 STAYBOLTS 86 FIBRE-GLASS ROPE DIA. 10
6 BODY INSULATION 87 HINGE PIN

9 FRONT DOOR (MONOBLOCK) 88a HINGE - LEFT HAND SIDE
11 FRONT INSULATION 88b HINGE - RIGHT HAND SIDE
15 RUBBER GASKET 89 OUTLET FOR PRESSURE MEASUREMENT
19 REAR INSULATION A SETSCREW M10 x 30
20 SIGHTGLASS FRAME B WASHER A10.5
21 SIGHTGLASS C NUT M10

22a SIGHTGLASS FRAME INSULATION D STUD M10 x 40
22b SIGHTGLASS INSULATION E NUT M8

24 FRONT DOOR REFRACTORY F WASHER A8.4

25 / 27 / 29 2ND PASS RETARDERS G SETSCREW M5 x 15

26 / 28 3RD PASS RETARDERS H NUT M6

30 DELIVERY STUB PIPE J WASHER A6.4
31 RETURN STUB PIPE K STUD M6 x 22
44 BLANK FLANGE L SELF TAPPING SCREW S6.3 x 30
47 SMOKEHOOD DIA.150 MM M SERRATED WASHER A4.3

50

SMOKEHOOD CLEANING COVER
INSULATION

N NUT M4

51 SMOKEHOOD CLEANING COVER P SELF TAPPING SCREW S4.8 x 9.5
53 CHASSIS - LEFT/RIGHT HAND SIDE R WASHER A6.4
54 SIDE CASINGS - LEFT/RIGHT HAND SIDE S SETSCREW M3 x 6
55 FRONT CASING LOWER PART U WASHER A9
56 FRONT CASING UPPER PART V STUD M8 x 50
57 ÜST SAC Y SETSCREW M8 x 16
58 BOILER DATA PLATE Z SETSCREW M8 x 30

PARTS NOT ILLUSTRATED

AA-1
AA-2

HONEYWELL L7248 – AQUASTAT
HYDROSTAT 3250 -- AQUASTAT

CC PRESSURE VALVE (30 lbs)

BB PRESSURE – TEMPERATURE GAGE DD DRAIN VALVE

30

14.0 START-UP TEST RESULTS

Model: Serial Number:
Boiler, # sections
Date of installation:
Installer (name & address):

TEST RESULTS

Size of unit (Btu/h):
Nozzle: Oil Pressure (psi):

Chimney size ____________ Direct vent system (DVS) _________

Burner adjustments: RIELLO F3___ BF3___ RIELLO F5___ BF5___ RIELLO F10____

Turbulator:
Air Gate:

Smoke result: #0_______ TRACE______
Combustion Results:

CO2 %
Chimney draft: “ W.C.
Ambient temperature: °F
Gross flue temperature: °F

31

Granby Furnaces Inc. manufactures a full line of oil and gas-fired
boilers in its 70,000 square feet facility. Granby products are sold
across Canada and the United States through a distribution
network.

Our team of engineers, designers and technicians continually
research and develop products to go beyond the demanding
specifications of today’s certifications.

Thank you

Thank you Thank you

Thank you for choosing Granby

for choosing Granbyfor choosing Granby

for choosing Granby....