Granby Conforto Series Setup guide

2021-3-1 G2020-E6 - Rev. C
Installation, Operation and
Service Manual
Conforto Boiler SERIES
B*C - 3 to 9 sections boiler
*Designates Brand Name
Three section boiler shown
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.
Manufactured by:
GRANBY FURNACES INC.
PO Box 637
12118 Hwy 209
Parrsboro Nova Scotia Canada, B0M 1S0
Distributed by:
GRANBY HEATING PRODUCTS, LLC.
67 Target Industrial Circle
Bangor, ME 04401
www.granbyindustries.com

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TABLE OF CONTENTS
Boiler – Oil
1.0 IMPORTANT SAFETY ADVICE ........................................................3
2.0 PRODUCT INFORMATION .............................................................4
3.0 UNIT INSTALLATION .....................................................................5
3.1 PLACEMENT & LEVELING OF THE UNIT ...........................................................................................................5
3.2 TRIM KIT COMPONENT INSTALLATION............................................................................................................5
3.3 JACKET ASSEMBLY AND CONTROL INSTALLATION ..........................................................................................7
4.0 PIPING.........................................................................................11
5.0 ELECTRICAL WIRING ...................................................................16
6.0 CHIMNEY INFORMATION ...........................................................19
7.0 FUEL SYSTEM ..............................................................................20
8.0 BURNER INSTALLATION AND SETTING .......................................21
9.0 TECHNICAL INFORMATION.........................................................24
10.0 BOILER START UP AND OPERATION ...........................................25
10.1 START UP PROCEDURE ................................................................................................................................25
10.2 HONEYWELL L7248 AQUASTAT ...................................................................................................................25
10.3 HYDROSTAT 3250 CONTROL........................................................................................................................26
11.0 MAINTENANCE / SERVICE...........................................................28
11.1 CLEANING THE BOILER ................................................................................................................................29
11.2 BURNER NOTES..........................................................................................................................................29
11.3 PERFORM COMBUSTION TEST...................................................................................................................29
12.0 EXPLODED PARTS VIEW.............................................................30
13.0 START-UP TEST RESULTS............................................................32

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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 the section IMPORTANT
SAFETY ADVICE in 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.
NEVER BURN GARBAGE, PAPER OR ANY OTHER COMBUSTIBLE MATERIAL
IN THE UNIT, AND NEVER LEAVE COMBUSTIBLE MATERIAL AROUND IT.
ALWAYS KEEP A CLEAR SPACE AROUND THE APPLIANCE
IMPORTANT
This manual contains instructional and operational information for the OIL-FIRED
Boiler. Read the instructions thoroughly before installing the 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 void the warranty.

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2.0 PRODUCT INFORMATION
PHYSICAL DIMENSIONS
No. of
Sections
Length
Weight
Shipping Weight
Water Content
Flue Size
(inches)
(pounds)
(pounds)
(us gal)
(inches)
3
18.5
275
310
6
5
4
23.0
338
379
7.5
5
5
27.5
401
447
9
5
6
31.75
464
515
10.5
6
7
36.25
527
586
12
6
8
40.5
590
654
13.5
6
9
45.0
653
722
15
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CLEARANCES
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 and
NFPA 31.Consult local fire codes for required clearances.
CLEARANCE (minimum) FOR SERVICING
Top 10” (254 mm)
Front 24” (609 mm)
Rear 24” (609 mm)
Control Mounted Side (Left/Right) 24”(609 mm)
Non-Control Mounted Side (Left/Right) 6” (152 mm)
CLEARANCE (minimum) TO COMBUSTIBLES
Top 10” (254 mm)
Front 24” (609 mm)
Rear 24” (609 mm)
Control Mounted Side (Left/Right) 24” (609 mm)
Non-Control Mounted Side (Left/Right) 6” (152 mm)
Chimney Connector 18” (457 mm)
Floor must be non-combustible.
DRAFT PRESSURE
Breech draft pressure -0.015’’ w.c. draft required
Drafts in excess of -0.015” w.c. will require the installation of a barometric damper.

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TEMPERATURE DELTA: 20°F
FLUE PIPE CONNECTION
CHIMNEY or Granby Direct Vent System (3, 4 & 5 section boiler only)
CLEANOUTS
Rear removable smoke hood & front combustion chamber swing door
FUEL
Not heavier than No.2 fuel oil
CAUTION: Do not use gasoline, crankcase drainings, or any oil containing
gasoline.
ELECTRICAL
120 Volts, 60Hz, 15 amps. fuse or breaker
AIR SUPPLY
CAUTION: Adequate air supply for both combustion and ventilation must be available.
See page 20 for details.
3.0 UNIT INSTALLATION
The installation of the unit shall be in accordance with regulations of the authorities having
jurisdiction and be in accordance with CSA B139, NFPA31 and NFPA211.
3.1 PLACEMENT & LEVELING OF THE UNIT
The boiler should be located on a 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 boiler may be leveled by the insertion of metal shims under the legs.
3.2 TRIM KIT COMPONENT INSTALLATION
If you purchased the “packaged” version of this boiler, the trim kit components and jacket have
been factory installed. Proceed to Section 3.2 – Step 8 – Control Mounting on page 11 of this
manual for remaining installation instructions.
If you purchased the “knockdown” version of this boiler, the trim kit components and jacket need
to be field installed following the instructions in sections 3.2 and 3.3.

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STEP 1: VERIFY CONTENTS OF TRIM KIT
The boiler trim kit package includes:
Knockdown Boiler Trim Kit Components
Item Part no. Description
Hydrolevel Kit
CBT-KD-3250-00
Honeywell Kit
CBT-KD-7248-00
Qty
Qty
1
CBF-BN-1025-00
1" x 2 1/2" Nipp
2
2
2
CBF-BT-1010-07
1" x 1" x 3/4" Tee
2
2
3
CBF-BP-0010-00
1" Plug
2
2
4
CBA-BD-0852-07
Drain
1
1
5
CBA-34-MPRV-00
Pressure Relief Valve
1
1
6
CBA-00-TRID-20
T&P Gauge
1
1
7
CBA-48-2010-00
3/4" Well
1
1
8
CBA-48-3250-58
Thermistor 48"
1
NA
9
CBA-48-3150-50
Grommet
1
1
10
CBA-48-102A-00
Remote Mount Kit
1
NA
11
CBA-48-3250-00
Hydrostat 3250 Plus
1
NA
12
CBA-HW-7248-00
Honeywell L7248
NA
1
13
CBA-HW-5001-48
Honeywell 48” Thermistor
NA
1
Package Boiler Trim Kit Components
Item Part no. Description
Hydrolevel Kit
CBT-PK-3250-00
Honeywell Kit
CBT-PK-7248-00
Qty
Qty
10
CBA-48-102A-00
Remote Mount Kit
1
NA
11
CBA-48-3250-00
Hydrostat 3250 Plus
1
NA
12
CBA-HW-7248-00
Honeywell L7248
NA
1
13
CBA-HW-5001-48
Honeywell 48” Thermistor
NA
1
STEP 2: INSTALL TRIM COMPONENTS
Knockdown Boiler trim items 1-7 should be installed now, prior to system piping & casing
installation. The remaining items and the Package Boiler trim items will be installed during later
steps in the manual. All threaded connections require the application of a high quality pipe thread
sealant.

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3.3 JACKET ASSEMBLY AND CONTROL INSTALLATION
The boiler jacket has been designed for ease of assembly and removal. The following are step
by step instructions. A philips screwdriver, 17mm socket and ratchet, 17mm wrench or
adjustable wrench are needed.
STEP 1: VERIFY CONTENTS OF JACKET ASSEMBLY PACKAGE.
Your jacket assembly will contain boiler block insulation, rear of block insulation, front panel
insulation, two (2) side panels, rear panel, top panel, front panel and a fastening package with
screws and foil tape for fastening insulation. See jacket content photos below.
NOTE: If you are installing a 7, 8, or 9 section boiler, the jacket will be supplied in
two boxes. Box 1: 4, 5, or 6 section boiler jacket (respectively). Box 2: rear jacket extension
which includes a top, two (2) side panels, block insulation and additional fastening screws.

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STEP 2: INSULATION INSTALLATION
Drape the large piece of boiler block insulation directly over the block taking care to provide equal
coverage on both sides. If installing a 7,8, or 9 section boiler, the extension insulation
should be draped over the rear 3 sections of the boiler. Install the rear insulation piece by
sliding it over the upper tie rods and around the flue collar as shown. Secure the rear insulation
to the boiler block insulation using the foil tape provided.
STEP 3: REAR PANEL INSTALLATION
Remove the four nuts from the rear of the tie rods. Slide the rear panel onto the tie rods until it
sits flush against the spacers. Re-install the nuts. Tighten the nuts to secure the rear panel.
STEP 4: SIDE PANEL ATTACHMENT
Remove the four nuts and washers from the front of the tie rods.

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STEP 4: SIDE PANEL ATTACHMENT CONTINUED
Align the left and right panel so the knock out on the side of each panel is located toward the
upper front corner of the boiler. Install each side panel by sliding the front mounting holes over
the front tie rods. The back of the side panel can then be slid over the rear panel. If installing a
7,8, or 9 section boiler, the extension side panels must be screwed to the boiler side
panels prior to mounting. Make sure the slotted holes on the extension side panels are
facing toward the back of the boiler.
Re-install the washers and nuts on the front tie rods and tighten. Secure the back of the side
panels to the rear panel with the sheet metal screws provided.
STEP 5: CONTROL SENSOR ATTACHMENT
Prior to jacket top and front panel installation the control sensor must be routed through the side
panel knock out. The boiler operating control can be mounted on either side of the boiler. Once
the control mounting side has been selected, remove the corresponding knockout, install the
plastic sensor protector and feed the sensor wire through the hole. Route the sensor wire over
the boiler insulation to the immersion well in the top rear section of the boiler. Make sure the
sensor bulb is fully inserted into the brass well and secure with the grommet provided.

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STEP 6: TOP 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. Secure the top panel to the
back of the side panels with 2 sheet metal screws provided in the hardware packet. If installing a
7,8, or 9 section boiler, the extension top panel will be mounted in the same way.
STEP 7: FRONT PANEL ATTACHMENT
Align the front panel pins with corresponding side panel clips. Push the front panel toward the
boiler and pins will snap into the clips. Be sure to engage all four pins on the front panel.
The jacket installation is now complete.