Lochinvar KBN081, KBN106, KBN151, KBN211, KBN286 Installation Manual

KBII-I-O Rev J

Installation & Operation Manual

Models: 81 - 286

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
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
Install Vent and Combustion Air Piping ...........................	15
Requirements for Installation in Canada..........................	16
Sizing ...............................................................................	16
Min./Max. Combustion Air & Vent Piping Lengths ............	16
Materials............................................................................	17
Optional Room Air............................................................	18
PVC/CPVC .......................................................................	19
Polypropylene...................................................................	20
Stainless Steel Vent .........................................................	21
4. SIDEWALL DIRECT VENTING
Vent/Air Termination - Sidewall...................................	22-25
Determine Location................................................	22-24
Prepare Wall Penetrations..........................................	24
Multiple Vent/Air Terminations .........................................	25
Sidewall Termination - Optional Concentric Vent .......	26-28
5. VERTICAL DIRECT VENTING
Vent/Air Termination - Vertical ....................................	29-30
Determine Location.....................................................	29
Prepare Roof Penetrations .........................................	30
Multiple Vent/Air Terminations....................................	30
Vertical Termination - Optional Concentric Vent ...	31-32
Alternate Vertical Concentric Venting....................	33-34

6. HYDRONIC PIPING
System Water Piping Methods.........................................	35
Low Water Cutoff Device .................................................	35
Chilled Water System.......................................................	35
Freeze Protection.............................................................	35
General Piping Information ..............................................	35
Relief Valve / T & P Installation .......................................	36
Near Boiler Piping Components..................................	36-37
Near Boiler Piping Connections .......................................	37
Circulator Sizing ...............................................................	37
Variable Speed Pump Option ..........................................	39
7. GAS CONNECTIONS
Connecting Gas Supply Piping ...................................	47-48
Natural Gas ......................................................................	48
Pipe Sizing for Natural Gas ........................................	48
Natural Gas Supply Pressure Requirements	............. 48
Propane Gas ....................................................................	48
Pipe Sizing for Propane Gas ......................................	48
Propane Supply Pressure Requirements ...................	48
Check Inlet Gas Supply ...................................................	49
Gas Pressure ...................................................................	50
Gas Valve Replacement ..................................................	50
8. FIELD WIRING
Line Voltage Connections ................................................	51
Low Voltage Connections ................................................	51
Wiring of the Cascade......................................................	53
9. CONDENSATE DISPOSAL
Condensate Drain ............................................................	55
10. STARTUP .............................................................	56-61
11. OPERATING INFORMATION
General.............................................................................	62
Cascade ...........................................................................	65
Sequence of Operation ...............................................	66-67
Knight Boiler Control Module ......................................	68-69
Status Display Screens ...............................................	70-72
12. MAINTENANCE
Maintenance and Annual Startup................................	73-77
13. DIAGRAMS
Ladder Diagram ...............................................................	78
Wiring Diagram.................................................................	79
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

NOTICE

WARNING

WARNING

Installer – Read all instructions, including this manual and the Knight Boiler Service Manual, before installing. Perform steps in the order given.

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.

•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.

CAUTION 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 “boilerCAUTION patent medicines”. Serious damage to

the boiler, personnel, and/or property may result.

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.Combustion chamber 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 (limit rated)

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 (housed with the high limit 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 LCD display

The electronic display consists of 4 buttons, a navigation dial and a multiple line liquid crystal display.

11.Flue pipe adapter

Allows for the connection of the vent 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.

4

16.SMART SYSTEM Control Module

The SMART SYSTEM Control responds to internal and external signals and controls the blower, gas valve, and pumps to meet the heating demand.

17.Manual 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.Relief valve

Protects the heat exchanger from an over pressure condition. The relief valve provided with the unit is set at 30 psi.

28.Flame sensor

Used by the control module to detect the presence of burner flame.

29.Line voltage wiring connections (knockouts)

Conduit connection points for the high voltage junction box.

30.Top panel

Removable panel to gain access to the internal components.

31.Power switch

Turns 120 VAC ON/OFF to the boiler.

32.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.

33.Air pressure switch

The air pressure switch detects blocked inlet conditions.

34.Transformer

The transformer provides 24V power to the integrated control.

35.High limit sensor (housed with the outlet temperature sensor)

Device that monitors the outlet water temperature. If the temperature exceeds its setting, the integrated control will break the control circuit, shutting the boiler down.

36.Gas shutoff switch

An electrical switch designed to cut power to the gas valve to prevent releasing any gas.

37.Over-temp switch (Model 286 Only) (located underneath access cover)

An electrical switch designed to shut down boiler operation in the event the outer back of the heat exchanger, directly above the flue connection exceeds 604°F (318°C). This is a one time switch and could warrant a heat exchanger replacement. Check the integrity of the rear refractory at the back of the upper coil if the switch opens.

Installation & Operation Manual

The Knight Boiler - How it works... (continued)

Models 81 - 211

30

10

22

24

29

31

11

Front View - Models 81 - 211		6
		Rear View - Models 81 - 211
	10	19
33			21
18
			16
15			34
		4	3
8		5	1
14	25	36
27		7	17
		35
13	12	2
20	28
		26
32
23
Left Side (inside unit) - Models 81 - 211		Right Side (inside unit) - Models 81 - 211
			5

Installation & Operation Manual

The Knight Boiler - How it works...

Model 286

18

	15
10	37
24

Front View - Model 286	Rear View - Model 286

33

34

4

Left Side (inside unit) - Model 286

Right Side (inside unit) - Model 286

6

Installation & Operation Manual

Ratings

A

SME

H

Knight Boiler

AHRI Rating

		Input		Heating	Net	AFUE
					AHRI
				Capacity		%
Model Number		MBH			Ratings
				MBH	Water,
					MBH
Note: Change “N” to		(Note 5)
“L” for L.P. gas models.
						(Note 1, 7)
	Max		Min	(Note 2,7)	(Note 3,7)
KBN081	16		80	74	64	95
KBN106	21		105	97	84	95
KBN151	30		150	139	121	95
KBN211	42		210	196	170	95
KBN286	57		285	267	232	95

Other Specifications

Boiler				Vent
			Air	Size
Water	Water	Gas
			Size
Content	Connections	Connections
Gallons
				(Note 4)
0.6	1"	1/2"	3"	3"
0.7	1"	1/2"	3"	3"
1.3	1"	1/2"	3"	3"
1.7	1"	1/2"	3"	3"
2.4	1-1/4"	3/4"	4"	4"

NOTICE	Maximum allowed working pressure is located on the rating plate.
		8. Knight boilers comply with the requirements of CSD-1
Notes:
		Section CW-400 requirements as a temperature operation
1. As an Energy Star Partner, Lochinvar has determined that		control. The manual reset high limit provided with the
Knight boilers meet the Energy Star guidelines for energy		Knight is listed to UL353.

efficiency.

2.The ratings are based on standard test procedures prescribed by the United States Department of Energy.

3.Net AHRI 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	UNIT EQUIPPED FOR
	the vent materials and methods specified in the Knight	HIGH ALTITUDE
	Installation and Operation Manual.
5.	Standard Knight boilers are equipped to operate from sea	3,000 FT. TO 12,000 FT.
	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 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)	Figure A High Altitude Label Location
	is also affixed to the unit.
7.	Ratings have been confirmed by the Hydronics Section of	7
	AHRI.

Installation & Operation Manual

1 Determine 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
		controls met safe lighting and other
		performance criteria when the boiler
		underwent tests specified in ANSI Z21.13
		– 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 freeWARNING of 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.

8

WARNING

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.

Do not install the appliance where the relative humidity may exceed 93%. Do not install the appliance where condensation may form on the inside or outside of the appliance, or where condensation may fall onto the appliance.

Failure to install the appliance indoors could result in severe personal injury, death, or substantial property damage.

This appliance requires a special venting system. If using PVC 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 KBN081 and KBN106 models, 86 cubic feet for KBN151 models, 107 cubic feet for KBN211 models, and 120 cubic feet for KBN286 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, polypropylene
	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 1/4" (6 mm) from combustible materials.

2.Vent pipe – at least 1" (25 mm) 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.

Installation & Operation Manual

1 Determine boiler location (continued)

Figure 1-1 Closet Installation - Minimum Required Clearances

1" MINIMUM CLEARANCE	CLOSET INSTALLATION
AROUND HOT WATER
PIPES AND VENT PIPE

12" LEFT

14"

REAR

	RECOMMENDED SERVICE CLEARANCES:			6"
	FRONT	- 24”
			FRONT
	TOP	- 24”
	LEFT SIDE	- 24”
	REAR	- 24”

			WARNING		For	closet installations,			CPVC,
	13”				polypropylene or			stainless		steel
	TOP				vent	material	MUST BE used in
					a closet structure due to elevated
					temperatures.		Failure to		follow
					this	warning	could	result	in	fire,
	6"
					personal injury, or death.

VENTILATING*

AIR OPENING

CLOSED DOOR

VENTILATING*

AIR OPENING

6"

0" RIGHT

*AREA OF EACH OPENING:

1 SQ. INCH PER 1000 BTU PER HOUR INPUT WITH A MINIMUM OF 100 SQ. INCHES.

Figure 1-2 Alcove Installation - Minimum Required Clearances

1/4" (6 MM) MINIMUM CLEARANCE AROUND HOT WATER PIPES

1” (25 MM) MINIMUM CLEARANCE AROUND VENT PIPE

12” LEFT

14”

REAR

RECOMMENDED SERVICE CLEARANCES:

FRONT - 24”

TOP - 24”

LEFT SIDE - 24”

REAR - 24”

ALCOVE INSTALLATION

13” TOP

18” FRONT

WARNING For alcove installations, CPVC, polypropylene or stainless steel

vent 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.

OPEN

FRONT

0” RIGHT

9

Installation & Operation Manual

1 Determine 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

1 Determine boiler location (continued)

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

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. For polypropylene or stainless steel venting, an adapter of the same manufacturer must be used at the flue collar connection.

•Size - To ensure proper pipe size is in place, see Table 3A. Check to see that this size is used throughout the vent system.

•Manufacturer - For a stainless steel or polypropylene application, you must use only the listed manufacturers and their type product listed in Tables 3E and 3G 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 3H 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 polypropylene and 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 19.

If any of these conditions are not met,WARNING the 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.

11

Installation & Operation Manual

1 Determine 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

2 Prepare 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

. 2

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
81		80
106		105
151		150
211		210 / W150
286		285

WARNING After converting to LP, check combustion per 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

3 General venting

Direct venting options - Sidewall Vent

Figure 3-1 Two-Pipe Sidewall Termination - See

Figure 3-2 PVC/CPVC Concentric Sidewall

page 22 for more details

Termination - See page 26 for more details

Direct venting options - Vertical Vent

Figure 3-3 Two-Pipe Vertical Termination - See page 29 for more details

Figure 3-4 PVC/CPVC Concentric Vertical Termination - See page 31 for more details

Figure 3-5 Vertical Vent, Sidewall Air - See page 21 for more details

14

Installation & Operation Manual

3 General venting (continued)

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.

WARNING

WARNING

NOTICE

This appliance requires a special venting system. Use only approved stainless steel, PVC, CPVC or polypropylene pipe and fittings listed in Tables 3D, 3E, and 3G for vent pipe, and fittings. Failure to comply could result in severe personal injury, death, or substantial property damage.

DO NOT mix components from different systems. The vent system could fail, causing leakage of flue products into the living space. Mixing of venting materials will void the warranty and certification of the appliance.

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

CAUTION NOTICE

For closet and alcove installations, CPVC, polypropylene 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.

Improper installation of venting systems may result in injury or death.

Follow the instructions in Section 1, page 12 of this manual when removing a boiler from an existing vent system.

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.

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.

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.

You must also install air piping from outside to the boiler air intake adapter unless following the Optional Room Air instructions on page 21 of this manual. The resultant installation is direct vent (sealed combustion).

Air intake/vent connections

1.Combustion Air Intake Connector (FIG. 3-6) - 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 3-7 thru 3-9) - 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 3-6 Near Boiler Air Piping

AIR

15

3 General venting

Requirements for installation in Canada

1.Installations must be made with a vent pipe system certified 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.

Sizing

The Knight boiler uses model specific combustion air intake and vent piping sizes as detailed in Table 3A below.

Table 3A Air Intake/Vent Piping Sizes

	Model		Air Intake	Vent
	81 - 211		3 inches	3 inches
	286		4 inches	4 inches
		Increasing or decreasing combustion air or
	NOTICE
		vent piping sizes is not authorized.

Installation & Operation Manual

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.

Table 3B Concentric Vent Kit Equivalent Vent Lengths

Model	Kit Number	Equivalent Vent
		Length
81 - 211	CVK3003	3 feet
286	CVK3007	3 feet

16

3 General venting (continued)

Materials

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, Polypropylene 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 air intake materials other than

	those specified can result in personal
	injury, death or property damage.
	The use of double-wall vent or insulated
NOTICE
	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 (3) 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.

Installation & Operation Manual

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.

Follow the polypropylene manufacturer's instructions when using polypropylene material as an inlet pipe.

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.

17

Installation & Operation Manual

3 General venting

Optional room air

Optional room air is intended for NOTICE 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 3C).

• 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.

• 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.

WARNING When utilizing the single pipe method, 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 3C Optional Room Air Kit

Model	Kit Number
81 - 211	KIT30052
286	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

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.

To prevent the potential of severe personal injury or death, check for areas and products listed in Table 1A, page 11 before installing the boiler or air inlet piping.

If contaminants are found, you MUST:

• Remove contaminants permanently. —OR—

• Relocate air inlet and vent terminations to other areas.

18

Installation & Operation Manual

3 General venting (continued)

PVC/CPVC

This product has been approved for use with the PVC/CPVC vent materials listed in Table 3D.

Installing vent and air piping

WARNING

NOTICE

NOTICE

WARNING

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. 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 Table 3D to make the vent connections. Failure to follow this warning could result in fire, personal injury, or death.

Use only cleaners, primers, and solvents that are approved for the materials which are joined together.

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).

Insulation should not be used on PVC or CPVC venting materials. The use of insulation will cause increased vent wall temperatures, which could result in vent pipe failure.

Table 3D PVC/CPVC Vent Pipe, and Fittings

Approved PVC/CPVC Vent Pipe and Fittings

Item	Material	Standard
	PVC Schedule 40, 80	ANSI/ASTM D1785
Vent pipe	PVC - DWV	ANSI/ASTM D2665
	CPVC Schedule 40, 80	ANSI/ASTM F441
	PVC Schedule 40	ANSI/ASTM D2466
Vent fittings	PVC Schedule 80	ANSI/ASTM D2467
	CPVC Schedule 80	ANSI/ASTM F439
Pipe Cement /	PVC	ANSI/ASTM D2564
Primer	CPVC	ANSI/ASTM F493

NOTICE: DO NOT USE CELLULAR (FOAM) CORE PIPE

NOTE: In Canada, CPVC and PVC vent pipe, fittings and cement/ primer must be ULC-S636 certified.

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. (Moisturewillretardcuringanddirtorgreasewillprevent 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.

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 and to the pipe end to approximately 1/2" beyond the socket depth.

c.Apply a second primer coat to the fitting socket.

d.While primer is still wet, apply an even coat of approved cement to the pipe equal to the depth of the fitting socket along with an even coat of approved cement to the fitting socket.

e.Apply a second coat of cement to the pipe.

f.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.

g.Wipe excess cement from the joint removing ring or beads as it will needlessly soften the pipe.

Figure 3-7 Near Boiler PVC/CPVC Venting

19

3 General venting

Polypropylene

This product has been approved for use with polypropylene vent with the manufacturers listed in Table 3E.

All terminations must comply with listed options in this manual and be a single-wall vent offering.

For use of flex pipe, it is recommended to have the vent material in 32°F or higher ambient space before bending at installation. No bends should be made to greater than 45° and ONLY installed in vertical or near vertical installations.

For support and special connections required, see the manufacturer's instructions. All vent is to conform to standard diameter and equivalent length requirements established.

WARNING

NOTICE

NOTICE

Table 3E Polypropylene Vent Pipe and Fittings

Approved Polypropylene Vent Manufacturers

Make	Model
Centrotherm Eco Systems	InnoFlue SW/Flex
Duravent (M & G Group)	PolyPro Single-Wall / PolyPro Flex

Installation & Operation Manual

Use only the adapters and vent system listed in Tables 3E and 3F. DO NOT mix vent systems of different types or manufacturers. Failure to comply could result in severe personal injury, death, or substantial property damage.

Installations must comply with applicable national, state, and local codes. For Canadian installation, polypropylene vent must be listed as a ULC-S636 approved system.

Installation of a polypropylene vent system should adhere to the vent manufacturer’s installation instructions supplied with the vent system.

	NOTICE	The installer must use a specific vent starter
		adapter at the flue collar connection.
		This adapter is supplied by the vent
		manufacturer to adapt to its vent system.
		See Table 3F for approved vent adapters.
		Discard CPVC starter piece.
		All vent connections MUST be secured by
	NOTICE
		the vent manufacturer's joint connector
		(FIG. 3-8).

WARNING Insulation should not be used on polypropylene venting materials. The use

of insulation will cause increased vent wall temperatures, which could result in vent pipe failure.

Figure 3-8 Near Boiler Polypropylene Venting

IMG00015

Table 3F Approved PolypropyleneTerminations

POLYPROPYLENE ADAPTER

JOINT CONNECTOR REQUIRED AT ALL COMPONENT CONNECTIONS OF VENT SYSTEM

Model		Centrotherm InnoFlue SW			Duravent Polypro
	Polypropylene	Joint	Sidewall Retaining	Sidewall	Polypropylene	Joint	Sidewall Kit*
	Adapter	Connector	Bracket*	Adapter*	Adapter	Connector
81 - 211	ISAAL0303	IANS03	IATP0303	ISTAGL0303	3PPS-AD	3PPS-LB	3PPS-HLK
286	ISAAL0404	IANS04	IATP0404	ISTAGL0404	4PPS-AD	4PPS-LB	4PPS-HLK

* These parts are only needed if the sidewall termination assembly is used (see FIG. 4-4B on page 24).

20

Installation & Operation Manual

3 General venting (continued)

Stainless steel vent

This product has been approved for use with stainless steel using the manufacturers listed in Table 3G.

WARNING Use only the materials, vent systems, and terminations listed in Tables 3G and 3H.

DO NOT mix vent systems of different types or manufacturers. Failure to comply could result in severe personal injury, death, or substantial property damage.

	NOTICE	The installer must use a specific vent starter
		adapter at the flue collar connection,
		supplied by the vent manufacturer to
		adapt to its vent system. See Table 3H for
		approved vent adapters. Discard CPVC
		starter piece.
		Installations must comply with applicable
	NOTICE
		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.

NOTICE	Installation of a stainless steel vent system
	should adhere to the stainless steel vent
	manufacturer’s installation instructions
	supplied with the vent system.

Figure 3-9 Near Boiler Stainless Steel Venting

S.S. ADAPTER

Table 3G Stainless Steel Vent Pipe and Fittings

Approved Stainless Steel Vent Manufacturers

Make	Model
Dura Vent (M & G Group)	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.

Table 3H Approved Stainless Steel (S.S.) Terminations and Adapters

		ProTech			Heat Fab			Z Flex
Model		FasNSeal			Saf-T Vent			Z-Vent
	S.S.	Flue	Intake Air	S.S.	Flue	Intake Air	S.S.	Flue		Intake Air
	Adapter	Termination	Termination	Adapter	Termination	Termination	Adapter	Termination		Termination
81 - 211	300715	FSBS3	303889	9301PVC	9392	9314TERM	2SVSLA03	2SVSTP03		2SVSTEX0390
		FSRC3(R.C)			5300CI			2SVSRCX03
286	F303759	FSBS4	FSAIH04	9401PVC	9492	9414TERM	2SVSLA04	2SVSTP04		2SVSTEX0490
		FSRC4(R.C.)	303888		5400CI			2SVSRCX04

21

Installation & Operation Manual

4 Sidewall direct venting

Vent/air termination – sidewall

WARNING

WARNING

Follow instructions below when determining vent location to avoid possibility of severe personal injury, death, or substantial property damage.

A gas vent extending through an exterior wall shall not terminate adjacent to a wall or below building extensions such as eaves, parapets, balconies, or decks. Failure to comply could result in severe personal injury, death, or substantial property damage.

Determine location

Locate the vent/air terminations using the following guidelines:

Figure 4-1A PVC/CPVC/ Polypropylene Sidewall Termination of Air and Vent w/Field Supplied Fittings

FACTORY PROVIDED

BIRD SCREEN

FACTORY PROVIDED

BIRD SCREEN

	1. The total length of piping for vent or air must not exceed		If using the sidewall termination:
	the limits given in the General Venting Section on page 16		3. The air piping must terminate in a down-turned elbow
	of this manual.		as shown in FIG. 4-1A. This arrangement avoids
	2. You must consider the surroundings when terminating		recirculation of flue products into the combustion air
	the	vent and air:	stream.
	a.	Position the vent termination where vapors will	4. The vent piping must terminate in an elbow pointed
		not damage nearby shrubs, plants or air	outward or away from the air inlet, as shown in FIG. 4-1A.
		conditioning equipment or be objectionable.		Do not exceed the maximum lengths of the
			WARNING
	b.	The flue products will form a noticeable plume as		outside vent piping shown in FIG. 4-1A.
		they condense in cold air. Avoid areas where the		Excessive length exposed to the outside
		plume could obstruct window views.		could cause freezing of condensate in the
	c.	Prevailing winds could cause freezing of		vent pipe, resulting in potential boiler
		condensate and water/ice buildup where flue		shutdown.
		products impinge on building surfaces or plants.	Whenventingout asidewallusingPVC,CPVC, orPolypropylene
	d.	Avoid possibility of accidental contact of flue
			vent materials, an optional sidewall vent termination kit can be

products with people or pets.	ordered (reference Table 4A for kit numbers).

e.Do not locate the terminations where wind eddies

	could affect performance or cause recirculation,			Table 4A Alternate Sidewall Vent Kits
	such as inside building corners, near adjacent
	buildings or surfaces, window wells, stairwells,			Model	Kit Number	Vent Size
	alcoves, courtyards, or other recessed areas.
				81 - 211	KIT30045	3 inch vent
	WARNING	Sidewall vent and air inlet terminations		286	KIT30046	4 inch vent
		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 4-1B Alternate PVC/CPVC/Polypropylene

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

22

Installation & Operation Manual

4 Sidewall direct venting (continued)

Vent/air termination – sidewall

Figure 4-1C Alternate PVC/CPVC/SS/ Polypropylene 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

GRADE OR

SNOW LINE

ALTERNATE VENTING ARRANGEMENT

(IF SPACE PERMITS)

Figure 4-1D Alternate SS Venting Arrangement - Typical Stainless Steel Sidewall Termination of Air and Vent w/Field Supplied Fittings, Utilizing a Hood Intake

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.

BIRD SCREEN

TO BOILER

INTAKE AIR

CONNECTION

12" (305 MM) MIN 15" (381 MM) MAX

FROM BOILER

VENT PIPE

CONNECTION

12" (305 MM) MIN

GRADE OR

SNOW LINE

5.Maintain clearances as shown in FIG.’s 4-1A thru 4-3B, pages 22 - 24. 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. Condensate could freeze and block vent pipe.

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.

Figure 4-2B Alternate Clearance to Gravity Air Inlets w/ Field Supplied Fittings

12”

MIN.

BIRD

SCREEN (TYPICAL)

12” MIN.

12” MIN.

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

23

Installation & Operation Manual

4 Sidewall direct venting

Figure 4-3B Alternate Clearance to Forced Air Inlets w/ Figure 4-4A PVC/CPVC Sidewall Termination Assembly 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.For Polypropylene Only: Install the vent and air intake sidewall adapters from Table 3F on page 20 into the vent plate. Slide the sidewall retaining bracket down the sidewall adapters flush to the vent plate (FIG. 4-4B).

3.For PVC/CPVC Only: Install the vent and air intake piping through the wall into the vent plate openings. Use RTV silicone sealant to seal the air pipe. Use the cement/primer listed in Table 3D on page 19 to seal the vent pipe.

4.Mount and secure the vent plate to the wall, using stainless steel screws.

5.Seal all gaps between the pipes and wall. Seal around the plate to the wall assuring no air gaps.

6.Assemble the vent cap to the vent plate (see FIG.'s 4-4A and 4-4B). Insert the stainless steel screws into the vent cap screw hole openings and securely attach the vent cap to the vent plate.

7.Seal all wall cavities.

8.PVC/CPVC terminations are designed to accommodate any wall thickness of standard constructions per the directions found in this manual.

9.Stainless steel terminations are designed to penetrate walls with a thickness up to 9.25 inches of standard construction.

	VENT AIR
AIR PIPING	CENTERLINE WIDTH
VENT PIPING
	VENT PLATE
WALL PLATE	VENT CAP
GALVANIZED
THIMBLE

Table 4B Sidewall Vent Centerline Dimensions

Model	Air	Vent	Centerline Width
151 - 200	3"	3"	5 5/8"
286	4"	4"	5 5/8"

Figure 4-4B Polypropylene Sidewall Termination Assembly

SIDEWALL

ADAPTER

(AIR)

WALL

PLATE

SIDEWALL

RETAINING

PLATE

VENT

PLATE

VENT

CAP

SIDEWALL ADAPTER (VENT)

GALVANIZED	IMG00085
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