IBC SL SERIES Installation instructions

INSTALLATION &
OPERATING MANUAL
Residential Condensing Boiler
SL 10-85 G3
SL 14-115 G3
SL 20-160 G3
SL 30-199 G3
WARNING
If the information in this manual is not followed exactly, a fire or explosion may result causing
property damage, personal injury, or loss of life.
Do not store or use gasoline or other flammable vapors and liquids or other combustible materials in
the vicinity of this or any other appliance.
If you smell gas:
Do not try to light any appliance.
Do not touch any electrical switch; do not use any phone in your building.
Immediately call your gas supplier from a nearby phone. Follow the gas supplier’s instructions.
If you cannot reach your gas supplier, call the fire department. Installation and service must be
performed by a qualified installer, service agency or the gas supplier.

Water quality
Warning
Water quality has a significant impact on the lifetime and performance of a boiler's heat
exchanger.
Improperly prepared water in a heating circuit may cause damage to the heat exchanger
through fouling or corrosion. Repeated or uncontrolled water fills will increase the potential
for damage.
High levels of dissolved solids or minerals may precipitate out of the fluid onto the hottest part
of the heat exchanger, impairing heat transfer and resulting in overheating and premature
failure. The amount of solids that may form on the heat exchanger will depend on the degree
of hardness and the total water volume in the system. A high water volume system with a low
hardness count may cause as much damage as a system with less volume and higher
hardness, so it is recommended to treat water so as to remove all dissolved solids. Other
water chemistry allowable limits are as follows:
Acidity pH is to be between 6.6 and 8.5
Chloride is to be less than 125 mg/l
Iron is to be less than 0.3 mg/l
Cu less than 0.1 mg/l
Conductivity is to be less than 400μS/cm (at 77°F [25°C])
7 grains/ gal (120 ppm)
Important: Ensure that these limits are acceptable for the other water-side components in
the system.
Shipped with the boiler:
1 x Wall mounting bracket
1 x Condensate trap assembly
1 x 30 psig pressure relief valve
1 x Outdoor temperature sensor
2 x ¼" x 2 ½" Lag screws/w flat washers
1 x Propane fuel conversion kit

Safety information
Manual safety markings
Danger
Points out an immediate hazardous
situation that must be avoided to
prevent serious injury or death.
Warning
Points out a potential hazardous
situation that must be avoided to
prevent serious injury or death.
Caution
Points out a potential hazardous
situation that must be avoided to
prevent possible moderate injury
and/or property damage.
Note
Points out installation, maintenance and
operational notes to enhance efficiency,
longevity and proper operation of the
boiler.
Important safety instructions
Installation, start-up and servicing of IBC boilers must be performed by competent, qualified, licensed
and trained heating technicians.
Failure to read and comply with all instructions and applicable national and local codes may result in
hazardous conditions that could result in property damage and injury to occupants, and in extreme
cases to death. Keep instructions near the air handling appliance for future reference.
Danger
Should overheating occur or the gas supply fails to shut off, do not turn off or disconnect
the electrical supply to the pump. Instead shut off the gas supply at a location external to
the appliance.
Danger
Do not store or use gasoline or other flammable vapors or liquids in the vicinity of this or
any other appliance. If you smell gas vapors, do not try to operate any appliance - do not
touch any electrical switch or use any phone in the building. Immediately, call the gas
supplier from a phone located remotely. Follow the gas supplier’s instructions, or if the
supplier is unavailable, contact the fire department.
3
Safety information

Warning
If the boiler is likely to be exposed to fluid temperatures below 34°F (1°C), use a method
to prevent freezing of condensate. Contact the factory for further information.
Warning
Do not use this boiler if any part has been under water. Immediately call a qualified
service technician to inspect the boiler and to replace any part of the control system and
any gas control that has been under water.
Warning
Improper installation, adjustment, alteration, service or maintenance can cause
property damage, personal injury, or loss of life. Read and understand the entire
manual before attempting installation, start-up, operation, or service. Installation and
service must be performed only by an experienced, skilled installer or service agency.
Failure to follow all instructions in the proper order can cause personal injury or death.
Read all instructions, including all those contained in component manufacturers’
manuals before installing, starting up, operating, maintaining, or servicing the
appliance.
Warning
Disconnect power supply before any wiring/service is performed. Failure to do so could
result in damage to appliance and/or electric shock.
Caution
The boiler must be installed so that electrical components are not exposed to water
during operation.
Known Corrosive Contaminants to Avoid
Cements and glues Refrigerant leaks from cracks in coils
Paint or varnish removers Sodium chloride or potassium chloride used for
water softening
Adhesives used to fasten building products
and other similar products
Chemicals in perming solutions
Chlorinated waxes or cleaners Chlorofluorocarbon chemicals found in spray cans
Chlorine-based swimming pool chemicals Antistatic dryer sheets in clothes dryers
Hydrochloric acid or muriatic acid used in
household cleaning and stain removal
Chlorine-type bleaches, detergents, and cleaning
solvents found in household laundry rooms
Calcium chloride used for snow clearing
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Section: Safety information

Contents
Safety information 3
Manual safety markings 3
Important safety instructions 3
Specifications 5
Cabinet dimensions 6
SL 10-85 G3, SL14-115 G3 6
SL20-160 G3 7
SL30-199 G3 8
Connection specifications 9
1.0 Introduction 11
1.1 Standard features and benefits 11
1.2 Warranty 12
2.0 Before installation 13
3.0 Installation 15
3.1 Code requirements 15
3.2 Removing an existing boiler 15
3.3 Determining location of the appliance 16
Best installation conditions 17
3.4 Mounting the boiler 17
3.5 Connecting the vent and air intake pipes 18
3.6 Installation clearances 19
3.7 Exhaust venting and air intake 20
3.7.1 Venting code 20
3.7.2 Venting options 21
3.7.3 Exhaust vent material 21
3.7.4 Direct vent 22
3.7.5 Rooftop vent termination 26
3.7.6 Sidewall vent termination 29
3.7.7 Combustion air filtration system 36
3.8 Closet installations 36
3.9 Installing the condensate trap 37
3.10 Installing a condensate neutralizer 40
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3.11 Water Piping 42
3.11.1 General piping best practices 44
3.11.2 System piping 44
3.12 Gas piping 56
3.12.1 Gas pressure 57
3.13 Electrical connections 58
3.13.1 Power management, quality and electrical protection 58
3.13.2 120VAC line-voltage hook-up 59
3.13.3 Other wiring 60
3.13.4 Zone valve hook-up 60
3.13.5 Thermostat / sensor wiring 61
3.13.6 Thermostat heat anticipator 61
4.0 About the boiler controller 63
4.1 Controller 63
4.2 Control interface 64
5.0 Before operating the boiler 65
Important pre-ignition checks 65
Checklist for electrical conditions, ducting and water connections 65
6.0 Boiler operation 67
6.1 Lighting and shutting down the boiler 67
6.2 Testing the ignition safety shutoff 68
6.3 Commissioning 68
6.3.1 Checking a boiler's fuel source 69
6.3.2 Performing a fuel conversion 69
6.3.3 Adjusting the gas valve 70
7.0 Service and maintenance 75
7.1 Maintenance checklist for homeowner 75
7.2 Maintenance checklist for heating contractor 75
7.2.1 Touchscreen boiler controller 76
7.2.2 General boiler maintenance 76
7.3 Replacing the fan, gas valve, and burner 80
7.3.1 Replacing the fan on the SL 85, 115, 160 and 199 G3 boilers 82
7.3.2 Replacing the gas valve on the SL 85, 115, 160 and 199 G3 boilers 83
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Section: Contents

7.3.3 Replacing the burner on the SL 85, 115, 160 and 199 G3 boilers 84
7.4 Cleaning the condensate trap 85
8.0 Troubleshooting 89
8.1 Electronic components 89
8.1.1 Temperature sensors 89
8.1.2 Fan 90
8.1.3 Water pressure sensor 90
8.1.4 Safety and Ignition Module (SIM+) 91
8.2 Troubleshooting error messages 92
8.2.1 Maximum ignition trials error 93
8.2.2 Hi Limit cut-off temperature error 94
8.2.3 Low Water Cut-off error 94
8.2.4 Aux. Interlock 1 or 2 94
8.3 Miscellaneous touchscreen controller errors 95
8.3.1 Ignition issues 96
8.3.2 Temperature issues 97
8.3.3 Miscellaneous issues 98
8.3.4 Cycling issues 99
Appendices 101
Wiring diagrams 101
V-10 Controller electrical diagram 101
Internal wiring diagram 102
Sequence of Operation 103
Exploded views of boiler parts 104
Installation & Commissioning Report 117
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Specifications
Boiler Specification SL 10-85 G3 SL 14-115 G3 SL20-160 G3 SL 30-199 G3
CSA Input (Natural Gas or
Propane) - MBH
CSA Input (Natural Gas or
Propane) - kW
CSA Output - MBH
CSA Output - kW
10.6 - 85
3.1 - 24.9
10.1 - 79
2.96 - 23.1
14 - 115
4.1 - 33.7
13.3 - 109
3.9 - 32
20 - 160
5.86 - 46.9
19 - 147
5.57 - 43.1
32 - 199
9.37 - 58.3
30 - 181.3
8.8 - 53.1
A.F.U.E 96% 95% 95% 95%
Minimum gas supply pressure
(Natural Gas or Propane) - inch
w.c.
4 4 4 4
Maximum gas supply pressure
(Natural Gas or Propane) - inch
w.c.
14 14 14 14
Power use (120Vac/60Hz) @ full
fire - Watts (less pumps)
54 72 82 100
Weight (empty) - lbs/Kg 85 / 39 85 / 39 102 / 46.3 152 / 69
Pressure vessel water content -
USG/Litres
2.47 / 9.35 2.47 / 9.35 1.72 / 6.51 5.09 / 19.3
Maximum boiler flow rate - USgpm 14 14 19 22
Minimum boiler flow rate - USgpm 2 2 4 6
Maximum operating water
pressure* - psig
30 30 30 30
Minimum water pressure - psig 8 8 8 8
Approved installation altitude - ASL 0 - 12,000’ 0 - 12,000’ 0 - 12,000’ 0 - 12,000’
Ambient temperature
Low °F / °C
High °F / °C
32°F / 0°C
122°F / 50°C
32°F / 0°C
122°F / 50°C
32°F / 0°C
122°F / 50°C
32°F / 0°C
122°F / 50°C
Max. relative humidity (non-
condensing)
90% 90% 90% 90%
Minimum water temp. 34°F / 1°C 34°F / 1°C 34°F / 1°C 34°F / 1°C
Maximum water temp. (electronic
hi-limit)
190°F / 88°C 190°F / 88°C 190°F / 88°C 190°F / 88°C
Max. Water Temperature Lockout 201°F / 94°C 201°F / 94°C 201°F / 94°C 201°F / 94°C

Boiler Specification SL 10-85 G3 SL 14-115 G3 SL20-160 G3 SL 30-199 G3
Limit
Max. ΔT - supply/return (electronic
fence)
40°F 40°F 40°F 40°F
Maximum equivalent vent length ,
each side (vent & air intake)
(Natural gas or propane)
Air intake options: either direct vent
or indoor supply
100’ (2")
240’ (3")
100’ (2")
240’ (3")
35’ (2")
170’ (3")
Not applicable
150’ (3")
* Boilers are shipped with a 30 psig pressure relief valve.
Cabinet dimensions
SL 10-85 G3, SL14-115 G3
Figure 1 : Front and side view - SL 10-85 G3, SL14-115 G3
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Section: Specifications

Figure 2 : Top view - SL 10-85 G3, SL14-115 G3 Figure 3 : Bottom view - SL 10-85 G3, SL14-115 G3
SL20-160 G3
Figure 4 : Front and side view - SL20-160 G3
7
SL20-160 G3

Figure 5 : Top view - SL20-160 G3 Figure 6 : Bottom view - SL20-160 G3
SL30-199 G3
Figure 7 : Front and side view - SL30-199 G3
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Section: Specifications

Figure 8 : Top view - SL30-199 G3 Figure 9 : Bottom view - SL30-199 G3
Connection specifications
The following table displays the required connection specifications.
SL10-85 G3,
SL14-115 G3 SL 20-160 G3 SL30-199 G3
A Flue Outlet 3" Schedule 40 or 3" PPs (80mm)
B Combustion Air 3" Schedule 40 or 3" PPs (80mm)
C LCD Display 2¼" x 4"
D Water Outlet 1"NPT-M 1"NPT-M 1¼” NPT-M
E Water Inlet 1"NPT-M 1"NPT-M 1¼” NPT-M
F Knock-outs (8) ½"
G Gas Inlet ½" NPT-F
H Condensate Outlet ¾" Hose
Table 1 Connections
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Connection specifications

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1.0 Introduction
The gas-fired modulating boilers are low pressure, fully condensing units with a variable input range.
Approved as “Category IV” vented appliances, the boilers use direct vent (sealed combustion) or
indoor combustion air.
Figure 10 View from the front - SL G3 residential boilers
1.1 Standard features and benefits
High thermal efficiency
Turn-down ratio 10 to 1
Control of up to 5 pumps – 1 boiler pump and 4 separate load pumps
Outdoor reset control
Load combining – simultaneous operation of two similar water temperature loads
Load zoning – simultaneous operation of up to four loads with the same control settings
Ability to manage and/or operate in a network of up to 24 IBC SL boilers

Internet/LAN connectivity for software updates and remote access through the IBC V-10
Portal
BACnet over IP compatible
Easy-to-use touchscreen
1.2 Warranty
For residential applications, IBC offers a 5-year warranty on all parts against defects in materials
or workmanship and failures due to thermal shock. In addition, IBC offers a heat exchanger
limited warranty with registration, according to the following terms:
0 - 10 years (100% coverage)
11+ years (25% coverage).
IBC offers a limited heat exchanger warranty with no registration of 0-5 years (100% coverage).
For non-residential applications, IBC offers a 5-year warranty on all parts against defects in
materials or workmanship and failures due to thermal shock. In addition, IBCoffers a heat
exchanger limited 10 year warranty with registration, according to the following terms:
0 - 5 years (100% coverage)
6 - 7 years (50% coverage)
8 years (40% coverage)
9 years (30% coverage)
10 years (20% coverage).
To view the full warranty statement for the SLG3 series and to register your product, go to
ibcboiler.com.
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Section: Introduction

13
2.0 Before installation
Before installing the appliance, it is important to review and observe the following checklist of
precautions:
Precautions Check
Care must be taken to properly size the boiler for its intended use.
Prolonged full fire run time, over-sizing or under-sizing, and incorrect flow rates through
the appliance can lead to increased maintenance costs, equipment stress and premature
failure.
□
Ensure you install the appliance where the combustion air source is not subject to
chemical fouling or agricultural vapors.
Exposure to corrosive chemical fumes such as chlorinated and/or fluorinated
hydrocarbons can reduce the life of a boiler. Cleaners, bleaches, air fresheners,
refrigerants, aerosol propellants, dry-cleaning fluids, de-greasers and paint-removers all
contain vapors that can form corrosive acid compounds when burned in a gas flame.
Airborne chlorides such as those released with the use of laundry detergents are also to
be avoided.
□
Locate the appliance where water leakage will not result in damage to the area.
If there is no suitable location, install a suitable drain pan under the boiler. Do not install
above carpeting.
□
At a new construction site, or during renovations, protect the appliance from drywall dust or
other construction related contaminants.
Draw combustion air from a clean source (e.g., outdoors) and isolate the boiler from
interior dust sources. Do not seal boiler case openings directly when firing - allow for air
circulation and ventilation in the immediate area.
□
Place the exhaust outlet 12" minimum above the down-turned intake to avoid exhaust re-
ingestion.
□
For sidewall venting options, place the inlet and exhaust terminations on the same side of
the building.
The elevation of both pipes can be raised in “periscope style” after passing through the
wall to gain required clearance above grade and snow level.
□
If using the indoor combustion air option, ensure combustion air openings to the boiler
room remain unblocked and free of obstructions.
□
Examine the condensate outlet to ensure proper disposal of condensate will occur during
operation. If condensates are to be discharged into building drain piping materials that are
subject to corrosion, a neutralization package must be used.
□

Precautions Check
Ensure that the pressure relief valve is installed with no valves or other means of isolation
between its inlet and the boiler.
Make sure the relief valve outlet is piped with unobstructed piping (minimum ¾" diameter)
to a safe discharge location.
□
If the appliance is likely to be exposed to fluid temperatures below 34° F (1° C), a method
of protection to prevent freezing of condensate should be employed. Contact the factory
for further information.
□
When the appliance is in operation, assess the impact of the steam plume normally at the
exhaust terminal of a condensing boiler.
Generally, intake and exhaust pipes should terminate at a rooftop or sterile wall location.
Boiler condensate is corrosive. Protective measures must be taken to prevent corrosion
damage to metal roofs or other metal building components in contact with the condensate.
Keep exhaust plumes well away from all building air intakes including those of neighboring
properties.
□
Caution
Care must be taken to properly size the boiler for its intended use. Prolonged full fire run
time, over-sizing or under-sizing, and incorrect flow rates through the boiler can lead to
increased maintenance costs, equipment stress and premature failure.
14
Section: Before installation

15
3.0 Installation
Refer to the Specifications section for dimensional drawings and connection specifications. Use these
drawings to find a suitable location for the appliance.
3.1 Code requirements
The appliances are tested and certified under CSA 4.9 / ANSI Z21.13. Below are the code
requirements for every installation.
Canada US
Conform to local codes, or in the absence of
these, with the latest editions of CAN/CGA
B149.1 and the Canadian Electrical Code Part 1
CSA C22.2 No. 1.
Where required by jurisdiction, installation must
conform to the Standard for Controls and Safety
Devices for Automatically Fired Boilers,
ANSI/ASME CSD-1.
If there is any conflict, follow the more stringent
regulations.
Conform to the current National Fuel Gas Code
ANSI Z223.1 and the National Electrical Code
ANSI/NFPA 70.
Where required by jurisdiction, installation must
conform to the Standard for Controls and Safety
Devices for Automatically Fired Boilers,
ANSI/ASME CSD-1.
If there is any conflict, follow the more stringent
regulations.
Table 2 Code requirements by country
3.2 Removing an existing boiler
When an existing boiler is removed from a common venting system, the common venting system
may be too large for proper venting of the appliances that remain connected to it. When resizing
any portion of the common venting system, use the minimum size according to the appropriate
tables in the National Fuel Gas Code, ANSI Z223.1 - latest edition. In Canada, follow the B149.1
Installation Code.
When removing an existing boiler, the following checks must be carried out for each of the
appliances still connected to the common exhaust system, by operating them one at a time:
Seal any unused opening in the common venting system.
Visually inspect the venting system for proper size and horizontal pitch. Determine that there
is no blockage or restriction, leakage, corrosion and other deficiencies that could cause an
unsafe condition.
(Where practical) Close all building doors and windows such as doors adjacent to
appliances remaining connected to the common venting system and other spaces.

Turn on the clothes dryers and any appliance not connected to the common venting
system.
Turn on any exhaust fans, such as range hoods and bathroom exhausts, so that
they will operate at maximum speed. Do not operate a summer exhaust fan.
Close fireplace dampers.
Place in operation the appliance being inspected.
Follow the lighting instructions.
Adjust the thermostat so that the appliance operates continuously.
After determining that each appliance remaining connected to the common venting
system properly vents when tested as outlined above, return doors, windows, exhaust
fans, fireplace dampers and any other gas-burning appliance to their previous condition.
Any improper operation of the common venting system should be corrected, so the
installation conforms with the National Fuel Gas Code, ANSI Z223.1 - latest edition. In
Canada, all installations must conform with the current CAN/CGA - B149.1-10
Installation Code and/or local codes.
3.3 Determining location of the appliance
The boilers are designed and approved for indoor installation (wall or rack mounting) in areas
such as an alcove, basement, or utility room. These areas should have a surrounding
temperature of 32 °F (0°C) to 122 °F (50 °C) and less than 90% relative humidity.
Danger
Do not common vent appliances with other existing appliances or with a new
appliance.
Warnings
Keep the area around a boiler clear of combustible materials, gasoline, and
other flammable vapors and liquids.
Ensure combustion air is not drawn from areas containing corrosive air such as
swimming pools or spas, including air directly next to outdoor pools and spas.
Ensure that a boiler is not exposed to water leaks from piping or components
located overhead, including condensation from uninsulated cold water lines
overhead.
Protect the gas ignition system components from water (dripping, spraying,
rain, etc.) during appliance operation and when servicing (pump replacement,
condensate trap servicing, control replacement, etc.).
Ensure that combustible materials do not make contact with exposed water
piping and associated components (relief valves, circulators, etc.). Check local
codes for required clearances and/or provide adequate insulation.
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Section: Installation