KB-I-O-16
Installation & Operation Manual
Models: 80 - 285
Starting Serial #H07H10040039
WARNING This manual must only be used by a qualified heating installer / service
technician. Read all instructions, including this manual and the Knight Boiler Service Manual, before installing. Perform steps in the order given. Failure to comply could result in severe personal injury, death, or substantial property damage.
Save this manual for future reference.
Contents
HAZARD DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . |
2 |
PLEASE READ BEFORE PROCEEDING . . . . . . . . . . . . |
3 |
THE KNIGHT BOILER -- HOW IT WORKS . . . . . . . . . . . |
4-6 |
RATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
7 |
1. DETERMINE BOILER LOCATION |
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Provide Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Provide Air Openings to Room . . . . . . . . . . . . . . . . . . . . 10 Flooring and Foundation . . . . . . . . . . . . . . . . . . . . . . . . 10 Residential Garage Installation . . . . . . . . . . . . . . . . . . . . 10 Vent and Air Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Prevent Combustion Air Contamination . . . . . . . . . . . . . . 10 Corrosive Contaminants and Sources . . . . . . . . . . . . . . . 11 Using an Existing Vent System to Install a New Boiler . . 11 Removing a Boiler from Existing Common Vent . . . . . . . 12
2. PREPARE BOILER
Remove Boiler from Wood Pallet . . . . . . . . . . . . . . . . . . 13 Gas Conversions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Leveling the Boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3. GENERAL VENTING
Direct Venting Options . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-15 Install Vent and Combustion Air Piping . . . . . . . . . . . . . . 16
PVC/CPVC Vent and Air Piping Materials . . . . . . . . . 16 Requirements for Installation in Canada . . . . . . . . . . . . . 16 Installing Vent and Air Piping . . . . . . . . . . . . . . . . . . . . . . 16 PVC/CPVC Air Intake/Vent Connections . . . . . . . . . . . . . 18 Air Inlet Pipe Materials . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Stainless Steel Vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Stainless Steel Air Intake/Vent Connections . . . . . . . . . . 19 Min./Max. Combustion Air & Vent Piping Lengths . . . . . . 19 Vent and Air Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Optional Room Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4. SIDEWALL DIRECT VENTING
Vent/Air Termination - Sidewall . . . . . . . . . . . . . . . . . . . . 21-24 Determine Location . . . . . . . . . . . . . . . . . . . . . . . . . . 21-23 Prepare Wall Penetrations . . . . . . . . . . . . . . . . . . . . . 23 Termination and Fittings . . . . . . . . . . . . . . . . . . . . . . . 24
Multiple Vent/Air Terminations . . . . . . . . . . . . . . . . . . . . . 24 Sidewall Termination - Optional Concentric Vent . . . . . . 25-27
5. VERTICAL DIRECT VENTING
Vent/Air Termination - Vertical . . . . . . . . . . . . . . . . . . . . . 28-29 Determine Location . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Prepare Roof Penetrations . . . . . . . . . . . . . . . . . . . . . 29
Termination and Fittings . . . . . . . . . . . . . . . . . . . . . . . . . 29
Multiple Vent/Air Terminations . . . . . . . . . . . . . . . . . . . . . 29
Vertical Termination - Optional Concentric Vent . . . . . . . 30-31
6. HYDRONIC PIPING
System Water Piping Methods . . . . . . . . . . . . . . . . . . . . 32
Low Water Cutoff Device . . . . . . . . . . . . . . . . . . . . . . . . . 32
Chilled Water System . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Freeze Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
General Piping Information . . . . . . . . . . . . . . . . . . . . . . . 32
Relief Valve / T & P Installation . . . . . . . . . . . . . . . . . . . . 32-33
Circulator Sizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Near Boiler Piping Connections . . . . . . . . . . . . . . . . . . . 33
Near Boiler Piping Components . . . . . . . . . . . . . . . . . . . 35
7. GAS CONNECTIONS
Connecting Gas Supply Piping . . . . . . . . . . . . . . . . . . . . 42
Natural Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Pipe Sizing for Natural Gas . . . . . . . . . . . . . . . . . . . . 43
Natural Gas Supply Pressure Requirements . . . . . . . 43
Propane Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Pipe Sizing for Propane Gas . . . . . . . . . . . . . . . . . . . 43
Propane Supply Pressure Requirements . . . . . . . . . . 43
Check Inlet Gas Supply . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Gas Valve Replacement . . . . . . . . . . . . . . . . . . . . . . . . . 45
8. FIELD WIRING
Line Voltage Connections . . . . . . . . . . . . . . . . . . . . . . . . 46
Low Voltage Connections . . . . . . . . . . . . . . . . . . . . . . . . 47
Wiring of the Cascade . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
9. CONDENSATE DISPOSAL |
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Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
50 |
10. STARTUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
51-56 |
11. OPERATING INFORMATION |
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General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Cascade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59-60
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 61-62
Knight Boiler Control Module . . . . . . . . . . . . . . . . . . . . . . 63-64
Status Display Screens . . . . . . . . . . . . . . . . . . . . . . . . . . 65-68
12. MAINTENANCE |
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Maintenance and Annual Startup . . . . . . . . . . . . . . . . . . |
69-73 |
13. DIAGRAMS |
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Ladder Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Revision Notes . . . . . . . . . . . . . . . . . . . . . . . . . Back Cover
Hazard definitions
The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or to important information concerning the life of the product.
DANGER
WARNING
CAUTION
CAUTION
NOTICE
DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not avoided, may result in property damage.
NOTICE indicates special instructions on installation, operation, or maintenance that are important but not related to personal injury or property damage.
2
Installation & Operation Manual
Please read before proceeding
WARNING Installer – Read all instructions, including this manual and the Knight Boiler Service Manual, before installing. Perform steps in the order given.
NOTICE
WARNING
WARNING
User – This manual is for use only by a qualified heating installer/service technician. Refer to the User’s Information Manual for your reference.
Have this boiler serviced/inspected by a qualified service technician, at least annually.
Failure to comply with the above could result in severe personal injury, death or substantial property damage.
When calling or writing about the boiler – Please have the boiler model and serial number from the boiler rating plate.
Consider piping and installation when determining boiler location.
Any claims for damage or shortage in shipment must be filed immediately against the transportation company by the consignee.
Factory warranty (shipped with unit) does not apply to units improperly installed or improperly operated.
Failure to adhere to the guidelines on this page can result in severe personal injury, death, or substantial property damage.
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.
This appliance MUST NOT be installed in any location where gasoline or flammable vapors are likely to be present.
WHAT TO DO IF YOU SMELL GAS
•Do not try to light any appliance.
•Do not touch any electric switch; do not use any phone in your building.
•Immediately call your gas supplier from a near by 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.
When servicing boiler –
•To avoid electric shock, disconnect electrical supply before performing maintenance.
•To avoid severe burns, allow boiler to cool before performing maintenance.
Boiler operation –
•Do not block flow of combustion or ventilation air to the boiler.
•Should overheating occur or gas supply fail to shut off, do not turn off or disconnect electrical supply to circulator. Instead, shut off the gas supply at a location external to the appliance.
•Do not use this boiler if any part has been under water. The possible damage to a flooded appliance can be extensive and present numerous safety hazards. Any appliance that has been under water must be replaced.
Boiler water –
•Thoroughly flush the system (without boiler connected) to remove sediment. The high-efficiency heat exchanger can be damaged by build-up or corrosion due to sediment.
•Do not use petroleum-based cleaning or sealing compounds in the boiler system. Gaskets and seals in the system may be damaged. This can result in substantial property damage.
•Do not use “homemade cures” or “boiler patent medicines”. Serious damage to the boiler, personnel, and/or property may result.
•Continual fresh make-up water will reduce boiler life. Mineral buildup in the heat exchanger reduces heat transfer, overheats the stainless steel heat exchanger, and causes failure. Addition of oxygen carried in by makeup water can cause internal corrosion in system components. Leaks in boiler or piping must be repaired at once to prevent makeup water.
Freeze protection fluids –
•NEVER use automotive antifreeze. Use only inhibited propylene glycol solutions, which are specifically formulated for hydronic systems. Ethylene glycol is toxic and can attack gaskets and seals used in hydronic systems.
3
Installation & Operation Manual
The Knight Boiler - How it works...
1.Stainless steel heat exchanger
Allows system water to flow through specially designed coils for maximum heat transfer, while providing protection against flue gas corrosion. The coils are encased in a jacket that contains the combustion process.
2.Heat exchanger access cover
Allows access to the combustion side of the heat exchanger coils.
3.Blower
The blower pulls in air and gas through the venturi (item 5). Air and gas mix inside the blower and are pushed into the burner, where they burn inside the combustion chamber.
4.Gas valve
The gas valve senses the negative pressure created by the blower, allowing gas to flow only if the gas valve is powered and combustion air is flowing.
5.Venturi
The venturi controls air and gas flow into the burner.
6.Flue gas sensor
This sensor monitors the flue gas exit temperature. The control module will modulate and shut down the boiler if flue gas temperature gets too hot. This protects the flue pipe from overheating.
7.Boiler outlet temperature sensor
This sensor monitors boiler outlet water temperature (system supply). If selected as the controlling sensor, the control module adjusts boiler firing rate so the outlet temperature is correct.
8.Boiler inlet temperature sensor
This sensor monitors return water temperature (system return). If selected as the controlling sensor, the control module adjusts the boiler firing rate so the inlet temperature is correct.
9.Temperature and pressure gauge (field installed, not shown)
Monitors the outlet temperature of the boiler as well as the system water pressure.
10.Electronic display
The electronic display consists of 7 buttons and a dual line 32character liquid crystal display.
11.Flue pipe adapter
Allows for the connection of the PVC vent pipe system to the boiler.
12.Burner (not shown)
Made with metal fiber and stainless steel construction, the burner uses pre-mixed air and gas and provides a wide range of firing rates.
13. Water outlet (system supply)
NPT water connection that supplies hot water to the system, either 1" or 1-1/4", depending on the model.
14.Water inlet (system return)
NPT water connection that returns water from the system to the heat exchanger, either 1" or 1-1/4", depending on the model.
15.Gas connection pipe
Threaded pipe connection, either 1/2" or 3/4", depending on the model. This pipe should be connected to the incoming gas supply for the purpose of delivering gas to the boiler.
16.SMART Control Module
The SMART Control responds to internal and external signals and controls the blower, gas valve, and pumps to meet the heating demand.
17.Automatic air vent
Designed to remove trapped air from the heat exchanger coils.
18.Air intake adapter
Allows for the connection of the PVC air intake pipe to the boiler.
19.High voltage junction box
The junction box contains the connection points for the line voltage power and all pumps.
20.Boiler drain port
Location from which the heat exchanger can be drained.
21.Low voltage connection board
The connection board is used to connect external low voltage devices.
22.Low voltage wiring connections (knockouts)
Conduit connection points for the low voltage connection board.
23.Condensate drain connection
Connects the condensate drain line to a 1/2" PVC union.
24.Access cover - front
Provides access to the gas train and the heat exchanger.
25.Ignition electrode
Provides direct spark for igniting the burner.
26.Flame inspection window
The quartz glass window provides a view of the burner surface and flame.
27.Gas shutoff valve
Manual valve used to isolate the gas valve from the gas supply.
28.High limit sensor
Device that monitors the outlet water temperature. If the temperature exceeds its setting, it will break the control circuit, shutting the boiler down.
29.Relief valve
Protects the heat exchanger from an over pressure condition. The relief valve may be set at 30 psi.
30.Flame sensor
Used by the control module to detect the presence of burner flame.
31.Line voltage wiring connections (knockouts)
Conduit connection points for the high voltage junction box.
32.Top panel
Removable panel to gain access to the internal components.
33.Power switch
Turns 120 VAC ON/OFF to the boiler.
34.Leveling legs
Used to allow the heat exchanger to be leveled. This is needed for the proper draining of the condensate from the combustion chamber.
35.Air pressure switch
The air pressure switch detects blocked inlet conditions.
4
Installation & Operation Manual
The Knight Boiler - How it works... (continued)
Models 80 - 210
Front View - Models 80 - 210 |
Rear View - Models 80 - 210 |
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Left Side (inside unit) - Models 80 - 210 |
Right Side (inside unit) - Models 80 - 210 |
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5 |
Installation & Operation Manual
The Knight Boiler - How it works...
Model 285
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Front View - Model 285 |
Rear View - Model 285 |
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4
5
Left Side (inside unit) - Model 285 |
Right Side (inside unit) - Model 285 |
6
Installation & Operation Manual
Ratings
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Knight Boiler |
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Other Specifications |
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I=B=R Rating |
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Net |
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Model Number |
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Input |
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Gross |
I=B=R |
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Boiler |
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MBH |
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Output |
Ratings |
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Air |
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Vent |
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Water |
Water |
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Gas |
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MBH |
Water, |
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Note: Change “N” to |
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Content |
Connections |
Connections |
Size |
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Size |
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(Note 5) |
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MBH |
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“L” for L.P. gas models. |
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Gallons |
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(Note 2,7) |
(Note 3,7) |
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(Note 4) |
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Min |
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Max |
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KBN080 |
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16 |
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80 |
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72 |
63 |
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0.6 |
1" |
1/2" |
3" |
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3" |
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KBN105 |
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105 |
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94 |
82 |
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0.7 |
1" |
1/2" |
3" |
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3" |
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KBN150 |
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30 |
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150 |
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135 |
117 |
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1.3 |
1" |
1/2" |
3" |
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3" |
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KBN210 |
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210 |
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190 |
165 |
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1.7 |
1" |
1/2" |
3" |
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3" |
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KBN285 |
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57 |
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285 |
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260 |
226 |
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2.4 |
1-1/4" |
3/4" |
4" |
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4" |
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Maximum allowed working pressure is located on the rating plate. |
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NOTICE |
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Notes: |
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1. As an Energy Star Partner, Lochinvar has determined that Knight boilers meet the Energy Star guidelines for energy efficiency.
2. The ratings are based on standard test procedures prescribed by the United States Department of Energy.
3. Net I=B=R ratings are based on net installed radiation of sufficient quantity for the requirements of the building and nothing need be added for normal piping and pickup. Ratings are based on a piping and pickup allowance of 1.15.
4. Knight boilers require special gas venting. Use only the vent materials and methods specified in the Knight Installation and Operation Manual.
5.Standard Knight boilers are equipped to operate from sea level to 4,500 feet only with no adjustments. The boiler will
de-rate by 4% for each 1,000 feet above sea level up to 4,500 feet.
6. High altitude Knight boilers are equipped to operate from 3,000 to 12,000 feet only with no field adjustments. The boiler will de-rate by 2% for each 1,000 feet above 3,000
feet. High altitude models are manufactured with a Figure A High Altitude Label Location different control module for altitude operation, but the
operation given in this manual remains the same as the standard boilers. A high altitude label (as shown in FIG. A) is also affixed to the unit.
7.Ratings have been confirmed by the Hydronics Institute, Section of AHRI.
UNIT EQUIPPED FOR
HIGH ALTITUDE
3,000 FT. TO 12,000 FT.
7
Installation & Operation Manual
1Determine boiler location
Installation must comply with:
•Local, state, provincial, and national codes, laws, regulations, and ordinances.
•National Fuel Gas Code, ANSI Z223.1 – latest edition.
•Standard for Controls and Safety Devices for Automatically Fired Boilers, ANSI/ASME CSD-1, when required.
•National Electrical Code.
•For Canada only: B149.1 Installation Code, CSA C22.1 Canadian Electrical Code Part 1 and any local codes.
NOTICE |
The Knight boiler gas manifold and |
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controls met safe lighting and other |
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performance criteria when the boiler |
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underwent tests specified in ANSI Z21.13 |
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– latest edition. |
Before locating the boiler, check:
1.Check for nearby connection to:
•System water piping
•Venting connections
•Gas supply piping
•Electrical power
2.Locate the appliance so that if water connections should leak, water damage will not occur. When such locations cannot be avoided, it is recommended that a suitable drain pan, adequately drained, be installed under the appliance. The pan must not restrict combustion air flow. Under no circumstances is the manufacturer to be held responsible for water damage in connection with this appliance, or any of its components.
3.Check area around the boiler. Remove any combustible materials, gasoline and other flammable liquids.
Failure to keep boiler area clear and free ofWARNING combustible materials, gasoline, and other flammable liquids and vapors can result in severe personal injury, death, or
substantial property damage.
4.The Knight boiler must be installed so that gas control system components are protected from dripping or spraying water or rain during operation or service.
5.If a new boiler will replace an existing boiler, check for and correct system problems, such as:
•System leaks causing oxygen corrosion or heat exchanger cracks from hard water deposits.
•Incorrectly-sized expansion tank.
•Lack of freeze protection in boiler water causing system and boiler to freeze and leak.
WARNING This appliance is certified as an indoor appliance. Do not install the appliance
outdoors or locate where the appliance will be exposed to freezing temperatures or to temperatures that exceed 100°F.
Failure to install the appliance indoors could result in severe personal injury, death, or substantial property damage.
This appliance requires a special ventingWARNING system. The vent connection to the
appliance must be made with the starter CPVC pipe section provided with the appliance. The field provided vent fittings must be cemented to the CPVC pipe section. Use only the vent materials, primer and cement specified in this manual to make the vent connections. Failure to follow this warning could result in fire, personal injury, or death.
Closet and alcove installations
A closet is any room the boiler is installed in which is less than 67 cubic feet for KBN080 and KBN105 models, 86 cubic feet for KBN150 models, 107 cubic feet for KBN210 models, and 120 cubic feet for KBN285 models.
An alcove is any room which meets the criteria for a closet with the exception that it does not have a door.
Example: Room dimensions = 4 feet long, 3 feet wide, and 8 foot ceiling = 4 x 3 x 8 = 96 cubic feet. This would be considered a closet for a Knight Boiler.
WARNING |
For closet and alcove installations as |
|
shown in FIG.’s 1-1 and 1-2, CPVC or |
|
stainless steel vent material must be used |
|
inside the structure. The ventilating air |
|
openings shown in FIG.’s 1-1 and 1-2 are |
|
required for this arrangement. Failure to |
|
follow this warning could result in fire, |
|
personal injury, or death. |
Provide clearances:
Clearances from combustible materials
1.Hot water pipes—at least 1" from combustible materials.
2.Vent pipe – at least 1" from combustible materials.
3.See FIG.’s 1-1 and 1-2 on page 9 for other clearance minimums.
Clearances for service access
1.See FIG.’s 1-1 and 1-2 on page 9 for recommended service clearances. If you do not provide the minimum clearances shown, it may not be possible to service the boiler without removing it from the space.
8
Installation & Operation Manual
1Determine boiler location (continued)
Figure 1-1 Closet Installation - Minimum Required Clearances
WARNING For closet installations, CPVC or stainless steel material MUST BE
used in a closet structure due to elevated temperatures. Failure to follow this warning could result in fire, personal injury, or death.
RECOMMENDED SERVICE CLEARANCES: 
FRONT |
- |
24” |
TOP |
- |
24” |
LEFT SIDE - |
24” |
|
REAR |
- |
24” |
Figure 1-2 Alcove Installation - Minimum Required Clearances
WARNING
For alcove installations, CPVC or stainless steel material MUST BE used in an alcove structure due to elevated temperatures. Failure to follow this warning could result in fire, personal injury, or death.
RECOMMENDED SERVICE CLEARANCES:
FRONT |
- |
24” |
TOP |
- |
24” |
LEFT SIDE - |
24” |
|
REAR |
- |
24” |
9
Installation & Operation Manual
1Determine boiler location
Provide air openings to room:
Knight boiler alone in boiler room
1.No air ventilation openings into the boiler room are needed when clearances around the Knight boiler are at least equal to the SERVICE clearances shown in FIG.’s 1-1 and 1-2. For spaces that do NOT supply this clearance, provide two openings as shown in FIG. 1-1. Each opening must provide one square inch free area per 1,000 Btu/hr of boiler input.
Knight boiler in same space with other gas or oilfired appliances
1.Follow the National Fuel Gas Code (U.S.) or CSA B149.1 (Canada) to size/verify size of the combustion/ventilation air openings into the space.
WARNING The space must be provided with combustion/ventilation air openings
correctly sized for all other appliances located in the same space as the Knight boiler.
Do not install the boiler in an attic.
Failure to comply with the above warnings could result in severe personal injury, death, or substantial property damage.
2.Size openings only on the basis of the other appliances in the space. No additional air opening free area is needed for the Knight boiler because it takes its combustion air from outside (direct vent installation).
Flooring and foundation
Flooring
The Knight boiler is approved for installation on combustible flooring, but must never be installed on carpeting.
WARNING Do not install the boiler on carpeting even if foundation is used. Fire can result,
causing severe personal injury, death, or substantial property damage.
If flooding is possible, elevate the boiler sufficiently to prevent water from reaching the boiler.
10 
Residential garage installation
Precautions
Take the following precautions when installing the appliance in a residential garage. If the appliance is located in a residential garage, it should be installed in compliance with the latest edition of the National Fuel Gas Code, ANSI Z223.1 and/or CAN/CGA-B149 Installation Code.
•Appliances located in residential garages and in adjacent spaces that open to the garage and are not part of the living space of a dwelling shall be installed so that all burners and burner ignition devices are located not less than 18 inches (46 cm) above the floor.
•The appliance shall be located or protected so that it is not subject to physical damage by a moving vehicle.
Vent and air piping
The Knight boiler requires a special vent system, designed for pressurized venting.
The boiler is to be used for either direct vent installation or for installation using indoor combustion air. When room air is considered, see Section 3, General Venting. Note prevention of combustion air contamination below when considering vent/air termination.
Vent and air must terminate near one another and may be vented vertically through the roof or out a side wall, unless otherwise specified. You may use any of the vent/air piping methods covered in this manual. Do not attempt to install the Knight boiler using any other means.
Be sure to locate the boiler such that the vent and air piping can be routed through the building and properly terminated. The vent/air piping lengths, routing and termination method must all comply with the methods and limits given in this manual.
Prevent combustion air contamination
Install air inlet piping for the Knight boiler as described in this manual. Do not terminate vent/air in locations that can allow contamination of combustion air. Refer to Table 1A, page 11 for products and areas which may cause contaminated combustion air.
WARNING You must pipe combustion air to the boiler air intake. Ensure that the
combustion air will not contain any of the contaminants in Table 1A, page 11. Contaminated combustion air will damage the boiler, resulting in possible severe personal injury, death or substantial property damage. Do not pipe combustion air near a swimming pool, for example. Also, avoid areas subject to exhaust fumes from laundry facilities. These areas will always contain contaminants.
Installation & Operation Manual
1Determine boiler location (continued)
When using an existing vent system to install a new boiler:
WARNING Failure to follow all instructions can result in flue gas spillage and carbon monoxide
emissions, causing severe personal injury or death.
Check the following venting components before installing:
•Material - For materials listed for use with this appliance, see Section 3 - General Venting, Table 3A. For stainless steel venting, an adapter of the same manufacturer (Table 3B) must be used at the flue collar connection.
•Size - To ensure proper pipe size is in place, see Table 3C. Check to see that this size is used throughout the vent system.
•Manufacturer - For a stainless steel application, you must use only the listed manufacturers and their type product listed in Table 3A for CAT IV positive pressure venting with flue producing condensate.
•Supports - Non-combustible supports must be in place allowing a minimum 1/4" rise per foot. The supports should adequately prevent sagging and vertical slippage, by distributing the vent system weight. For additional information, consult the vent manufacturer’s instructions for installation.
•Terminations - Carefully review Sections 3 through 5 to ensure requirements for the location of the vent and air terminations are met and orientation of these fit the appropriate image from the Sidewall or Vertical options listed in the General Venting Section. For stainless steel vent, only use terminations listed in Table 3B for the manufacturer of the installed vent.
•Seal - With prior requirements met, the system should be tested to the procedure listed in parts (c) through (f) of the Removal of an Existing Boiler Section on page 12.
With stainless steel vent, seal and connect all pipe and components as specified by the vent manufacturer used; with PVC/CPVC vent, see the Installing Vent or Air Piping Section on page 16.
If any of these conditions are not met, theWARNING existing system must be updated or
replaced for that concern. Failure to follow all instructions can result in flue gas spillage and carbon monoxide emissions, causing severe personal injury or death.
Table 1A Corrosive Contaminants and Sources
Products to avoid:
Spray cans containing chloro/fluorocarbons
Permanent wave solutions
Chlorinated waxes/cleaners
Chlorine-based swimming pool chemicals
Calcium chloride used for thawing
Sodium chloride used for water softening
Refrigerant leaks
Paint or varnish removers
Hydrochloric acid/muriatic acid
Cements and glues
Antistatic fabric softeners used in clothes dryers
Chlorine-type bleaches, detergents, and cleaning solvents found in household laundry rooms
Adhesives used to fasten building products and other similar products
Areas likely to have contaminants
Dry cleaning/laundry areas and establishments
Swimming pools
Metal fabrication plants
Beauty shops
Refrigeration repair shops
Photo processing plants
Auto body shops
Plastic manufacturing plants
Furniture refinishing areas and establishments
New building construction
Remodeling areas
Garages with workshops
11 
Installation & Operation Manual
1Determine boiler location
When removing a boiler from existing common vent system:
DANGER |
Do not install the Knight boiler into a |
|
common vent with any other appliance. |
|
This will cause flue gas spillage or |
|
appliance malfunction, resulting in |
|
possible severe personal injury, death, or |
|
substantial property damage. |
|
Failure to follow all instructions can result |
WARNING |
|
|
in flue gas spillage and carbon monoxide |
|
emissions, causing severe personal injury |
|
or death. |
At the time of removal of an existing boiler, the following steps shall be followed with each appliance remaining connected to the common venting system placed in operation, while the other appliances remaining connected to the common venting system are not in operation.
a.Seal any unused openings in the common venting system.
b.Visually inspect the venting system for proper size and horizontal pitch and determine there is no blockage or restriction, leakage, corrosion, or other deficiencies, which could cause an unsafe condition.
c.Test vent system – Insofar as is practical, close all building doors and windows and all doors between the space in which the appliances remaining connected to the common venting system are located and other spaces of the building. Turn on 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 they will operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace dampers.
d.Place in operation the appliance being inspected. Follow the lighting instructions. Adjust thermostat so appliance will operate continuously.
e.Test for spillage at the draft hood relief opening after 5 minutes of main burner operation. Use the flame of a match or candle, or smoke from a cigarette, cigar, or pipe.
f.After it has been determined that each appliance remaining connected to the common venting system properly vents when tested as outlined herein, return doors, windows, exhaust fans, fireplace dampers, and any other gas-burning appliance to their previous conditions of use.
g.Any improper operation of the common venting system should be corrected so the installation conforms with the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and/or CAN/CSA B149.1, Natural Gas and Propane Installation Code. When resizing any portion of the common venting system, the common venting system should be resized to approach the minimum size as determined using the appropriate tables in Part 11 of the National Fuel Gas Code, ANSI Z223.1/NFPA and/or CAN/CSA B149.1, Natural Gas and Propane Installation Code.
12 
2Prepare boiler
Remove boiler from wood pallet
1.After removing the outer shipping carton from the boiler, remove the parts box.
2.Remove the front door to access the lag bolts in front of the unit (FIG. 2-1).
3.To remove the boiler from the pallet (after removing the front door):
a.Remove the two lag bolts from the wood pallet inside the boiler (FIG. 2-1).
b.Detach the boiler from the lag bolts in the rear of the unit, see FIG. 2-1.
NOTICE
Do not drop the boiler or bump the jacket on the floor or pallet. Damage to the boiler can result.
Figure 2-1 Boiler Mounted on Shipping Pallet
Gas conversions
WARNING For a boiler already installed, you must turn off gas supply, turn off power and
allow boiler to cool before proceeding. You must also completely test the boiler after conversion to verify performance as described under Start-up, Section 10 of this manual. Failure to comply could result in severe personal injury, death, or substantial property damage.
You must install a propane orifice to operate the Knight boiler on propane gas. Verify when installing that the orifice size marking matches boiler size (Table 2A).
1.Remove the top and front access covers from the unit (no tools required for removal).
2.Remove the three screws securing the gas valve to the venturi (FIG. 2-2).
3.Locate the propane orifice disk from the conversion kit bag. Verify that the stamping on the orifice disk matches the boiler size (see Table 2A).
Place the orifice into the black rubber grommet in the side of the gas valve and secure in the valve (FIG. 2-2).
4.Reposition the gas valve against the venturi and replace the screws (FIG. 2-2) securing the valve to the venturi.
Installation & Operation Manual
5.After installation is complete, attach the propane conversion label (in the conversion kit bag) next to the boiler rating plate. Attach the LP caution label (in the conversion kit bag) to the left side of the unit in the lower left corner.
6.Replace the top and front access covers.
Table 2A LP Conversion Table
|
|
|
LP Conversion Table |
||
|
Model |
|
LP Orifice Stamping |
||
|
80 |
|
|
|
80 |
|
105 |
|
|
105 |
|
|
150 |
|
|
150 |
|
|
210 |
|
|
210 / W150 |
|
|
285 |
|
|
285 |
|
|
|
|
After converting to LP, check combustion per |
||
|
WARNING |
|
|||
|
|
|
the Start-up procedure in Section 10 of this |
||
|
|
|
manual. |
Failure to check and verify |
|
combustion could result in severe personal injury, death, or substantial property damage.
Figure 2-2 Installing Propane Orifice
Leveling the boiler
1.Set the boiler in place and check level.
a)Adjust legs if necessary to level boiler, see FIG. 2-3 below.
Figure 2-3 Leveling Legs on the Boiler
13 
Installation & Operation Manual
3General venting
Direct venting options - Sidewall Vent
Figure 3-1 PVC/CPVC Two-Pipe Sidewall Termination - See page 21 for more details
Figure 3-2 Stainless Steel Two-Pipe - See page 22 for more details
Figure 3-3 PVC/CPVC Concentric Sidewall
Termination - See page 25 for more details
14 
Installation & Operation Manual
3General venting (continued)
Direct venting options - Vertical Vent
Figure 3-4 PVC/CPVC Two-Pipe Vertical Termination - See page 28 for more details
Figure 3-5 Stainless Steel TwoPipe Vertical Termination - See page 28 for more details
Figure 3-6 PVC/CPVC Concentric Vertical Termination - See page 30 for more details
Direct venting options - Vertical Vent, Sidewall Air
Figure 3-7 PVC/CPVC Vertical Vent, Sidewall Air - See page 20 for more details
Figure 3-8 Stainless Steel Vertical Vent, Sidewall Air - See page 20 for more details
NOTICE Stainless steel vent/air design and terminations will vary slightly by manufacturer.
15
Installation & Operation Manual
3General venting
Install vent and combustion air piping
DANGER The Knight boiler must be vented and supplied with combustion and ventilation
air as described in this section. Ensure the vent and air piping and the combustion air supply comply with these instructions regarding vent system, air system, and combustion air quality. See also Section 1 of this manual.
Inspect finished vent and air piping thoroughly to ensure all are airtight and comply with the instructions provided and with all requirements of applicable codes.
Failure to provide a properly installed vent and air system will cause severe personal injury or death.
PVC/CPVC vent piping materials
WARNING
NOTICE
Use only the materials listed in Table 3A for vent pipe, and fittings. Failure to comply could result in severe personal injury, death, or substantial property damage.
Installation must comply with local requirements and with the National Fuel Gas Code, ANSI Z223.1 for U.S. installations or CSA B149.1 for Canadian installations.
WARNING
NOTICE
For closet and alcove installations, CPVC or stainless steel material MUST BE used in a closet/alcove structure. Failure to follow this warning could result in fire, personal injury, or death.
All PVC vent pipes must be glued, properly supported, and the exhaust must be pitched a minimum of a 1/4 inch per foot back to the boiler (to allow drainage of condensate).
WARNING
16 
This appliance requires a special venting system. The vent connection to the appliance must be made with the starter CPVC pipe section provided with the appliance if PVC/CPVC vent is to be used. For stainless steel venting use an adapter from Table 3B (pg. 19) that corresponds with the intended vent manufacturer to be used and discard the CPVC starter piece. The field provided vent fittings must be cemented to the CPVC pipe section using an “All Purpose Cement” suitable for PVC and CPVC pipe. Use only the vent materials, primer, and cement specified in this manual to make the vent connections. Failure to follow this warning could result in fire, personal injury, or death.
Requirements for installation in Canada
1. Installations must be made with a vent pipe system certified to ULC-S636.
IPEX is an approved vent manufacturer in Canada supplying vent material listed to ULC-S636.
2. The first three (3) feet of plastic vent pipe from the appliance flue outlet must be readily accessible for visual inspection.
3. The components of the certified vent system must not be interchanged with other vent systems or unlisted pipe/fittings. For concentric vent installations, the inner vent tube must be replaced with field supplied certifiedvent material to comply with this requirement.
4. The 3" Concentric Vent Kit available from Lochinvar (see Section 4 – Sidewall Termination – Optional Concentric Vent) and the 3" Concentric Vent Kit available from IPEX are both approved for use on the Knight boiler. Both kits are listed to the ULC-S636 standard for use in Canada.
CAUTION Improper installation of PVC or CPVC systems may result in injury or death.
Installing vent and air piping
NOTICE
Use only cleaners, primers, and solvents that are approved for the materials which are joined together.
1.Work from the boiler to vent or air termination. Do not exceed the lengths given in this manual for the air or vent piping.
2.Cut pipe to the required lengths and deburr the inside and outside of the pipe ends.
3.Chamfer outside of each pipe end to ensure even cement distribution when joining.
4.Clean all pipe ends and fittings using a clean dry rag. (Moisture will retard curing and dirt or grease will prevent adhesion.)
5.Dry fit vent or air piping to ensure proper fit up before assembling any joint. The pipe should go a third to two-thirds into the fitting to ensure proper sealing after cement is applied.
Installation & Operation Manual
3 General venting (continued)
6.Priming and Cementing:
a.Handle fittings and pipes carefully to prevent contamination of surfaces.
b.Apply a liberal even coat of primer to the fitting socket.
c.Apply a liberal even coat of primer to the pipe end to approximately 1/2" beyond the socket depth.
d.Apply a second primer coat to the fitting socket.
e.While primer is still wet, apply an even coat of approved cement to the pipe equal to the depth of the fitting socket.
f.While primer is still wet, apply an even coat of approved cement to the fitting socket.
g.Apply a second coat of cement to the pipe.
h.While the cement is still wet, insert the pipe into the fitting, if possible twist the pipe a 1/4 turn as you insert it. NOTE: If voids are present, sufficient cement was not applied and joint could be defective.
i.Wipe excess cement from the joint removing ring or beads as it will needlessly soften the pipe.
Table 3A Vent Pipe, and Fittings
All vent pipe materials and fittings must comply with the following:
Item |
|
Material |
Standards for installation in: |
|
|
|
|
||
|
United States |
Canada |
||
|
|
|
||
|
|
PVC schedule 40 |
ANSI/ASTM D1785 |
CPVC and PVC venting must be ULC- |
|
|
|
|
S636 Certified. IPEX is an approved |
|
|
PVC-DWV |
ANSI/ASTM D2665 |
|
Vent pipe and fittings |
|
manufacturer in Canada supplying vent |
||
|
CPVC schedule 40/80 |
ANSI/ASTM F441 |
||
|
|
material listed to ULC-S636. |
||
|
|
|
|
|
|
|
AL29-4C |
UL1738 |
ULC-S636 |
Pipe cement/primer |
|
PVC |
ANSI/ASTM D2564 |
IPEX System 636 |
|
|
|
Cements & Primers |
|
|
CPVC |
ANSI/ASTM F493 |
||
|
|
|||
|
|
NOTICE: DO NOT USE CELLULAR (FOAM) CORE PIPE |
||
|
|
|
||
|
|
Approved Stainless Steel Vent Manufacturers |
||
|
|
|
|
|
|
|
Make |
|
Model |
ProTech Systems (Simpson Dura-Vent Co.) |
|
FasNSeal Vent / FasNSeal Flex* Vent |
||
|
|
|
|
|
Z-Flex (Nova Flex Group) |
|
|
Z-Vent |
|
|
|
|
||
Heat Fab (Selkirk Corporation) |
|
Saf-T Vent |
||
|
|
|
|
|
*Use of FasNSeal Flex smooth inner wall vent is to be used in vertical or near vertical sections only, taking precaution to ensure no sagging occurs of the vent system. Connect to the FasNSeal rigid vent using specially designed adapters and sealing method, see manufacturer’s instructions.
PVC/CPVC air intake/vent connections
1.Combustion Air Intake Connector (FIG.’s 3-9 and 3-10) - Used to provide combustion air directly to the unit from outdoors. A fitting is provided on the unit for final connection. Combustion air piping must be supported per guidelines listed in the National Mechanical Code, Section 305, Table 305.4 or as local codes dictate.
2.Vent Connector (FIG.’s 3-9 and 3-10) - Used to provide a passageway for conveying combustion gases to the outside. A transition fitting is provided on the unit for final connection. Vent piping must be supported per the National Building Code, Section 305, Table 305.4 or as local codes dictate.
Figure 3-9 Near Boiler PVC/CPVC Venting Models Figure 3-10 Near Boiler PVC/CPVC Venting Model 285 80 - 210 
AIR
VENT
3” CPVC PIPE SUPPLIED WITH BOILER MUST BE USED FOR VENT CONNECTION
NOTE: CPVC VENT PIPE AND VENT FITTINGS MUST BE USED IN CLOSET AND ALCOVE INSTALLATIONS.
4” CPVC PIPE SUPPLIED WITH BOILER MUST BE USED FOR VENT CONNECTION
NOTE: CPVC VENT PIPE AND VENT FITTINGS MUST BE USED IN CLOSET AND ALCOVE INSTALLATIONS.
17 
3General venting
Air inlet pipe materials:
The air inlet pipe(s) must be sealed. Choose acceptable combustion air inlet pipe materials from the following list:
PVC, CPVC or ABS
Dryer Vent or Sealed Flexible Duct (not recommended for rooftop air inlet)
Galvanized steel vent pipe with joints and seams sealed as specified in this section.
Type “B” double-wall vent with joints and seams sealed as specified in this section.
AL29-4C, stainless steel material to be sealed to specification of its manufacturer.
*Plastic pipe may require an adapter (not provided) to transition between the air inlet connection on the appliance and the plastic air inlet pipe.
WARNING Using vent or air intake materials other than those specified, failure to properly seal
all seams and joints or failure to follow vent pipe manufacturer’s instructions can result in personal injury, death or property damage. Mixing of venting materials will void the warranty and certification of the appliance.
NOTICE
The use of double-wall vent or insulated material for the combustion air inlet pipe is recommended in cold climates to prevent the condensation of airborne moisture in the incoming combustion air.
Sealing of Type “B” double-wall vent material or galvanized vent pipe material used for air inlet piping on a sidewall or vertical rooftop Combustion Air Supply System:
a.Seal all joints and seams of the air inlet pipe using either Aluminum Foil Duct Tape meeting UL Standard 723 or 181A-P or a high quality UL Listed silicone sealant such as those manufactured by Dow Corning or General Electric.
b.Do not install seams of vent pipe on the bottom of horizontal runs.
c.Secure all joints with a minimum of three sheet metal screws or pop rivets. Apply Aluminum Foil Duct Tape or silicone sealant to all screws or rivets installed in the vent pipe.
d.Ensure that the air inlet pipes are properly supported.
The PVC, CPVC, or ABS air inlet pipe should be cleaned and sealed with the pipe manufacturer’s recommended solvents and standard commercial pipe cement for the material used. The PVC, CPVC, ABS, Dryer Vent or Flex Duct air inlet pipe should use a silicone sealant to ensure a proper seal at the appliance connection and the air inlet cap connection. Dryer vent or flex duct should use a screw type clamp to seal the vent to the appliance air inlet and the air inlet cap. Proper sealing of the air inlet pipe ensures that combustion air will be free of contaminants and supplied in proper volume.
18 
Installation & Operation Manual
When a sidewall or vertical rooftop combustion air supply system is disconnected for any reason, the air inlet pipe must be resealed to ensure that combustion air will be free of contaminants and supplied in proper volume.
DANGER |
Failure to |
properly seal all joints and |
|
seams as required in the air inlet piping |
|||
|
|||
|
|||
|
may result in flue gas recirculation, |
||
|
spillage of flue products and carbon |
||
|
monoxide |
emissions causing severe |
|
|
personal injury or death. |
||
Stainless steel vent
This product has been approved for use with stainless steel using the manufacturers listed in Table 3A.
WARNING Use only the materials, vent systems, and terminations listed in Table 3B. DO NOT
mix vent systems of different types or manufacturers, unless listed in this manual. Failure to comply could result in severe personal injury, death, or substantial property damage.
NOTICE |
Installations must comply with applicable |
|
national, state, and local codes. Stainless |
||
|
||
|
steel vent systems must be listed as a |
|
|
UL-1738 approved system for the United |
|
|
States and a ULC-S636 approved system |
|
|
for Canada. |
|
|
Installation of a stainless steel vent system |
|
NOTICE |
||
should adhere to the stainless steel vent |
||
|
||
|
manufacturer’s installation instructions |
|
|
supplied with the vent system. |
|
|
The installer must use a specific vent |
|
NOTICE |
||
starter adapter at the flue collar |
||
|
||
|
connection, supplied by the vent |
|
|
manufacturer to adapt to its vent system. |
|
|
See Table 3B for approved vent adapters. |
|
|
Discard CPVC starter piece. |
Installation & Operation Manual
3General venting (continued)
Stainless |
steel |
air |
intake/vent |
Figure 3-11 Near Boiler Stainless Steel Venting Model 285 |
connections |
|
|
|
|
1. Combustion Air Intake Connector (FIG. 3-11) - Used to provide combustion air directly to the unit from outdoors. A fitting is provided on the unit for final connection. Combustion air piping must be supported per guidelines listed in the National Mechanical Code, Section 305, Table 305.4 or as local codes dictate.
2. Vent Connector (FIG. 3-11) - Used to provide a passageway for conveying combustion gases to the outside. A transition fitting is provided on the unit for final connection. Vent piping must be supported per the National Building Code, Section 305, Table 305.4 or as local codes dictate.
|
|
|
|
|
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|
|
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|
|
3" S.S. ADAPTER |
|
||
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|
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|
|||
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|
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|
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|
|
3" S.S. INTERMEDIATE |
|
||||
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|
|
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|
|||||
|
|
|
|
|
|
|
|
|
(FOR SAF-T VENT ONLY) |
|
||||
Table 3B Approved Stainless Steel Terminations and Adapters |
|
|
|
|
|
|
|
|
|
|||||
|
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|
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|
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|
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|
|
ProTech |
|
Heat Fab |
|
|
|
|
|
Z Flex |
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
FasNSeal |
|
Saf-T Vent |
|
|
|
|
|
Z-Vent |
|
|||
Model |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Boiler |
Flue |
Intake |
Boiler |
Intermediate |
Flue |
Intake |
Boiler |
Flue |
|
Intake Air |
||||
|
|
|||||||||||||
|
Air |
Air |
|
|||||||||||
|
Adapter |
Termination |
Adapter |
Adapter |
Termination |
Adapter |
Termination |
|
Termination |
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Termination |
Termination |
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80 - 210 |
300715 |
FSBS3 |
303889 |
KB80210 |
9353BUREZ-1* |
9392 |
9314TERM |
2SVSLA03 |
2SVSTP03 |
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2SVSTEX0390 |
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FSRC3(R.C) |
5300CI |
2SVSRCX03 |
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285 |
F303759 |
FSBS4 |
FSAIH04 |
KB285600 |
9454BUREZ-1* |
9492 |
9414TERM |
2SVSLA04 |
2SVSTP04 |
|
2SVSTEX0490 |
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FSRC4(R.C.) |
303888 |
5400CI |
2SVSRCX04 |
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* = This adapter must be used in addition to the boiler adapter for Saf-T vent pipe as shown in FIG. 3-11, unless approved vent other than standard diameter is used. Consult a Heat Fab representative for questions.
The Knight boiler uses model specific combustion air intake and vent piping sizes as detailed in Table 3C below.
Table 3C Air Intake/Vent Piping Sizes
|
Model |
|
Air Intake |
Vent |
|
|
|
|
|
|
80 - 210 |
|
3 inches |
3 inches |
|
|
|
|
|
|
285 |
|
4 inches |
4 inches |
|
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|
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|
|
Increasing or decreasing combustion air |
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|
NOTICE |
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or vent piping is not authorized. |
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Minimum / Maximum allowable combustion air and vent piping lengths are as follows:
Combustion Air = 12 equivalent feet minimum / 100 equivalent feet maximum
Vent = 12 equivalent feet minimum / 100 equivalent feet maximum
When determining equivalent combustion air and vent length, add 5 feet for each 90° elbow and 3 feet for each 45° elbow.
EXAMPLE: 20 feet of PVC pipe + (4) 90° elbows + (2) 45° elbows + (1) concentric vent kit (CVK3003) = 49 equivalent feet of piping.
NOTICE |
The appliance output rating will reduce by |
|
up to 1.5% for each 25 feet of vent length. |
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19 
Installation & Operation Manual
3General venting
Table 3D Concentric Vent Kit Equivalent Vent Lengths
Model |
Kit Number |
Equivalent Vent |
|
Length |
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|
|
||
80 - 210 |
CVK3003 |
3 feet |
|
|
|
|
|
285 |
CVK3007 |
3 feet |
|
|
|
|
Removing from existing vent
Follow the instructions in Section 1, page 12 of this manual when removing a boiler from an existing vent system.
Vent and air piping
Vent and air system:
NOTICE
Installation must comply with local requirements and with the National Fuel Gas Code, ANSI Z223.1 for U.S. installations or CSA B149.1 for Canadian installations.
You must also install air piping from outside to the boiler air intake adapter. The resultant installation is direct vent (sealed combustion).
You may use any of the vent/air piping methods covered in this manual. Do not attempt to install the Knight boiler using any other means.
WARNING |
DO NOT mix components from different |
|
systems. The vent system could fail, causing |
|
leakage of flue products into the living |
|
space. Use only approved stainless steel, |
|
PVC or CPVC pipe and fittings. For |
|
PVC/CPVC use with primer and cement |
|
specifically designed for the material used. |
Vent, air piping and termination:
The Knight boiler vent and air piping can be installed through the roof or through a sidewall. Follow the procedures in this manual for the method chosen. Refer to the information in this manual to determine acceptable vent and air piping length.
Optional room air
NOTICE
Optional room air is intended for commercial applications. Combustion air piping to the outside is recommended for residential applications.
Commercial applications utilizing the Knight boiler may be installed with a single pipe carrying the flue products to the outside while using combustion air from the equipment room. In order to use the room air venting option the following conditions and considerations must be followed.
•The unit MUST be installed with the appropriate room air kit (Table 3E).
•The equipment room MUST be provided with properly sized openings to assure adequate combustion air. Please refer to instructions provided with the room air kit.
20 
•There will be a noticeable increase in the noise level during normal operation from the inlet air opening.
•Using the room air kit makes the unit vulnerable to combustion air contamination from within the building. Please review Section 1, Prevent Combustion Air Contamination, to ensure proper installation.
•Vent system and terminations must comply with the standard venting instructions set forth in this manual.
When utilizing the single pipe method, WARNING provisions for combustion and ventilation air must be in accordance with Air for Combustion and Ventilation, of the latest edition of the National Fuel Gas Code, ANSI Z223.1, in Canada, the latest edition of CGA Standard B149 Installation Code for Gas Burning Appliances and Equipment, or applicable provisions of the local building
codes.
Table 3E Optional Room Air Kit
Model |
Kit Number |
80 - 210 |
KIT30052 |
|
|
285 |
KIT30053 |
|
|
Air contamination
Pool and laundry products and common household and hobby products often contain fluorine or chlorine compounds. When these chemicals pass through the boiler, they can form strong acids. The acid can eat through the boiler wall, causing serious damage and presenting a possible threat of flue gas spillage or boiler water leakage into the building.
Please read the information given in Table 1A, page 11, listing contaminants and areas likely to contain them. If contaminating chemicals will be present near the location of the boiler combustion air inlet, have your installer pipe the boiler combustion air and vent to another location, per this manual.
WARNING |
If the boiler combustion air inlet is located |
|
in a laundry room or pool facility, for |
|
example, these areas will always contain |
|
hazardous contaminants. |
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To prevent the potential of severe personal |
WARNING |
|
|
injury or death, check for areas and products |
|
listed in Table 1A, page 11 before installing |
|
the boiler or air inlet piping. |
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If contaminants are found, you MUST: |
|
• Remove contaminants permanently. |
|
—OR— |
|
• Relocate air inlet and vent terminations |
|
to other areas. |
Installation & Operation Manual
4Sidewall direct venting
Vent/air termination – sidewall
WARNING |
Follow |
instructions |
below |
when |
|
determining vent location to avoid |
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possibility of severe personal injury, death, |
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or substantial property damage. |
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A gas vent extending through an exterior |
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WARNING |
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wall shall not terminate adjacent to a wall or |
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below building extensions such as eaves, |
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parapets, balconies, or decks. Failure to |
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comply could result in severe personal |
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injury, death, or substantial property |
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damage. |
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WARNING Do not connect any other appliance to the vent pipe or multiple boilers to a common
vent pipe. Failure to comply could result in severe personal injury, death, or substantial property damage.
NOTICE |
Installation must comply with local |
|
requirements and with the National Fuel |
||
|
||
|
||
|
Gas Code, ANSI Z223.1 for U.S. |
|
|
installations or CSA B149.1 for Canadian |
|
|
installations. |
Determine location
Locate the vent/air terminations using the following guidelines:
1.The total length of piping for vent or air must not exceed the limits given in the General Venting Section on page 19 of this manual.
2.You must consider the surroundings when terminating the vent and air:
a.Position the vent termination where vapors will not damage nearby shrubs, plants or air conditioning equipment or be objectionable.
b.The flue products will form a noticeable plume as they condense in cold air. Avoid areas where the plume could obstruct window views.
c.Prevailing winds could cause freezing of condensate and water/ice buildup where flue products impinge on building surfaces or plants.
d.Avoid possibility of accidental contact of flue products with people or pets.
e.Do not locate the terminations where wind eddies could affect performance or cause recirculation, such as inside building corners, near adjacent buildings or surfaces, window wells, stairwells, alcoves, courtyards, or other recessed areas.
WARNING Sidewall vent and air inlet terminations must terminate in the same pressure zone.
f.Do not terminate above any door or window. Condensate can freeze, causing ice formations.
g.Locate or guard vent to prevent condensate damage to exterior finishes.
Figure 4-1A PVC/CPVC Sidewall Termination of Air
and Vent
TO BOILER
INTAKE AIR
CONNECTION
FROM BOILER
VENT PIPE
CONNECTION
12"
POSSIBLE ORIENTATIONS |
MIN |
TO
OVER-
HANG
|
VENT / AIR |
|
|
TERMINATION |
|
|
|
12" |
|
|
MIN |
|
|
GRADE OR |
|
|
SNOW LINE |
Table 4A Sidewall Vent Kits |
|
|
Model |
Kit Number |
Vent Size |
80 - 210 |
KIT30045 |
3 inch vent |
285 |
KIT30046 |
4 inch vent |
If using the alternate sidewall termination:
3.The air piping must terminate in a down-turned elbow as shown in FIG. 4-1B. This arrangement avoids recirculation of flue products into the combustion air stream.
4.The vent piping must terminate in an elbow pointed outward or away from the air inlet, as shown in FIG. 4-1B.
WARNING Do not exceed the maximum lengths of the outside vent piping shown in FIG. 4-1B.
Excessive length exposed to the outside could cause freezing of condensate in the vent pipe, resulting in potential boiler shutdown.
Figure 4-1B Alternate PVC/CPVC Sidewall Termination of Air and Vent w/Field Supplied Fittings
21 
4Sidewall direct venting
Vent/air termination – sidewall
Figure 4-1C Alternate PVC/CPVC Venting Arrangement (if Space Allows) w/Field Supplied Fittings
TO BOILER
INTAKE AIR COUPLING
CONNECTION
12” MIN
15” MAX FROM BOILER 
VENT PIPE CONNECTION
BIRD SCREEN
12”
MIN
BIRD
SCREEN
ALTERNATE VENTING ARRANGEMENT
(IF SPACE PERMITS)
Figure 4-1D Alternate PVC/CPVC/SS Venting Arrangement - Typical Stainless Steel Sidewall Termination of Air and Vent w/Field Supplied Fittings, Utilizing 90° Elbow Intake
TO BOILER
INTAKE AIR 12" MIN CONNECTION
15" MAX
FROM BOILER
VENT PIPE
CONNECTION
12" MIN
BIRD SCREEN
MODELS 80 - 285
Figure 4-1E Alternate SS Venting Arrangement - Typical Stainless Steel Sidewall Termination of Air and Vent w/Field Supplied Fittings, Utilizing FasNSeal’s Hood Intake
BIRD SCREEN
TO BOILER
INTAKE AIR
CONNECTION
12" (305 MM) MIN 15" (381 MM) MAX
FROM BOILER
VENT PIPE
CONNECTION
12" (305 MM) MIN
MODEL 285 WITH FASNSEAL ONLY
22
Installation & Operation Manual
5.Maintain clearances as shown in FIG.’s 4-1A thru 4-3B, pages 21 and 23. Also maintain the following:
a.Vent must terminate:
•At least 6 feet from adjacent walls.
•No closer than 12 inches below roof overhang.
•At least 7 feet above any public walkway.
•At least 3 feet above any forced air intake within 10 feet.
•No closer than 12 inches below or horizontally from any door or window or any other gravity air inlet.
b.Air inlet must terminate at least 12 inches above grade or snow line; at least 12 inches below the vent termination; and the vent pipe must not extend more than 24 inches vertically outside the building as shown in FIG. 4-1B.
c.Do not terminate closer than 4 feet horizontally from any electric meter, gas meter, regulator, relief valve, or other equipment. Never terminate above or below any of these within 4 feet horizontally.
6.Locate terminations so they are not likely to be damaged by foreign objects, such as stones or balls, or subject to buildup of leaves or sediment.
Figure 4-2A Clearance to Gravity Air Inlets
12"
MIN.
VENT / AIR
TERMINATION
12" 
MIN.
12" 
MIN.
Figure 4-2B Alternate Clearance to Gravity Air Inlets w/Field Supplied Fittings
12”
MIN.
BIRD
SCREEN (TYPICAL)
12” 
MIN.
12” 
MIN.
Installation & Operation Manual
4Sidewall direct venting (continued)
Figure 4-3A Clearance to Forced Air Inlets
IF LESS
THAN 10’
VENT / AIR
TERMINATION 36"
MIN.
FORCED AIR
INLET
7' MIN. ABOVE ANY PUBLIC WALKWAY
4.Assemble the vent cap to the vent plate (see FIG. 4-4A). Insert the stainless steel screws into the vent cap screw hole openings and securely attach the vent cap to the vent plate.
5.Seal all wall cavities.
Figure 4-4A Sidewall Termination Assembly
|
AIR PIPING |
VENT PIPING |
|
|
VENT PLATE |
WALL PLATE |
VENT CAP |
|
|
GALVANIZED |
|
THIMBLE |
|
Figure 4-3B Alternate Clearance to Forced Air Inlets w/Field Supplied Fittings
IF LESS
THAN 10’
36”
MIN.
FORCED AIR
INLET
BIRD
SCREEN
(TYPICAL)
7’ MIN. ABOVE ANY
PUBLIC WALKWAY
Prepare wall penetrations
1.Use the factory supplied wall plate as a template to locate the vent and air intake holes and mounting holes.
Air pipe penetration:
a.Cut a hole for the air pipe. Size the air pipe hole as close as desired to the air pipe outside diameter.
Vent pipe penetration:
a.Cut a hole for the vent pipe. For either combustible or noncombustible construction, size the vent pipe hole with at least a 1/2 inch clearance around the vent pipe outer diameter:
•4½ inch hole for 3 inch vent pipe
•5½ inch hole for 4 inch vent pipe
Drill 3/16" diameter holes for inserting the plastic anchors into the wall.
2.Install the vent and air intake piping through the wall into the vent plate openings. Seal all gaps between the pipes and wall. Use RTV silicone sealant to seal the air pipe. Use the cement/primer listed in Table 3A on page 17 to seal the vent pipe.
3.Mount and secure the vent plate to the wall using stainless steel screws. Seal around the plate to the wall assuring no air gaps.
Prepare wall penetrations (Alternate - Field Supplied Option)
1.Air pipe penetration:
a.Cut a hole for the air pipe. Size the air pipe hole as close as desired to the air pipe outside diameter.
2.Vent pipe penetration:
a.Cut a hole for the vent pipe. For either combustible or noncombustible construction, size the vent pipe hole with at least a 1/2 inch clearance around the vent pipe outer diameter:
•4½ inch hole for 3 inch vent pipe
•5½ inch hole for 4 inch vent pipe
b.Insert a galvanized metal thimble in the vent pipe hole as shown in FIG. 4-4B.
3.Use a sidewall termination plate as a template for correct location of hole centers.
4.Follow all local codes for isolation of vent pipe when passing through floors or walls.
5.Seal exterior openings thoroughly with exterior caulk.
Figure 4-4B Alternate Sidewall Termination Assembly w/Field Supplied Fittings
ELBOW
AIR PIPING
VENT PIPING
BIRD SCREEN
GALVANIZED |
|
ELBOW |
THIMBLE |
|
|
|
|
|
|
SIDEWALL |
BIRD SCREEN |
|
|
|
|
TERMINATION PLATE |
|
23 
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