Lochinvar SNA285-125, SNR150-100, SNR200-100, SNA500-125, SNA400-125 User Manual

Installation & Service

Manual

Models: SNR150-100, SNR200-100,

SNA285-125, SNA400-125, AND

SNA500-125

This manual must only be used by a qualified heating installer / service technician. Read all instructions in this manual before installing. Perform steps in the order given. Failure to comply could result in severe personal injury, death, or substantial property damage.

 WARNING

Save this manual for future reference.

-- Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

-- WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any phone in your

building.

• Immediately call your gas supplier from a 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.

WARNING: If the information in these instructions is not

followed exactly, a fire or explosion may result causing property damage, personal injury or death.

SWH-I-S Rev D

Contents

PLEASE READ BEFORE PROCEEDING . . . . . . . . . . . 3

Hazard Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

THE SHIELD -- HOW IT WORKS . . . . . . . . . . . . . . . . . 4-6

RATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1. DETERMINE WATER HEATER LOCATION

Closet and Alcove Installations . . . . . . . . . . . . . . . . . . . . 8

Provide Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Flooring and Foundation . . . . . . . . . . . . . . . . . . . . . . . . 10

Remove Water Heater from Wood Pallet . . . . . . . . . . . 10

Prevent Combustion Air Contamination . . . . . . . . . . . . 10

Removing Water Heater From Existing Common Vent . 11

Combustion & Ventilation Air Requirements . . . . . . . . . 11

2. GENERAL VENTING

Direct Venting Options . . . . . . . . . . . . . . . . . . . . . . . . . 14

Venting and Combustion Air . . . . . . . . . . . . . . . . . . . . . 15

Requirements for Installation in Canada . . . . . . . . . . . . 15

Air Intake/Vent Connections . . . . . . . . . . . . . . . . . . . . . 16

Vent & Air Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3. SIDEWALL DIRECT VENTING . . . . . . . . . . . . . . . . 18-24

4. VERTICAL DIRECT VENTING . . . . . . . . . . . . . . . . 25-28

5. CONVENTIONAL AND SIDEWALL VENTING . . . . 29

6. SYSTEM PIPING

General Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Scalding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Water Chemistry . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Piping Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Piping Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . 32-34

7. GAS CONNECTIONS

Connecting Gas Supply Piping . . . . . . . . . . . . . . . . . . . 35

Natural Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Pipe Sizing for Natural Gas . . . . . . . . . . . . . . . . . . . 36

Natural Gas Supply Pressure Requirements . . . . . . 36

Propane Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Pipe Sizing for Propane Gas . . . . . . . . . . . . . . . . . . 36

Propane Supply Pressure Requirements . . . . . . . . 36

Check Inlet Gas Supply . . . . . . . . . . . . . . . . . . . . . . . . . 37

Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Gas Valve Replacement . . . . . . . . . . . . . . . . . . . . . . . . 38

8. FIELD WIRING

Low Voltage Connections . . . . . . . . . . . . . . . . . . . . . . . . 39

Power Cord Connection . . . . . . . . . . . . . . . . . . . . . . . . . 39

Runtime Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Alarm Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

9. CONDENSATE DISPOSAL

Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

10. START-UP

Check for Gas Leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Inspect/fill Condensate System . . . . . . . . . . . . . . . . . . . . 43

Final Checks Before Starting the Water Heater . . . . . . . 44-46

11. OPERATING INFORMATION

How the Water Heater Operates . . . . . . . . . . . . . . . . . . . 47

Temperature Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Protection Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Water Heater Temperature Regulation . . . . . . . . . . . . . . 48

Adjustable Control Parameters . . . . . . . . . . . . . . . . . . . . 48

Saving Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 49

The Shield Control Module . . . . . . . . . . . . . . . . . . . . . . . 50

Status Display Screens . . . . . . . . . . . . . . . . . . . . . . . . . . 51-52

12. MAINTENANCE

Maintenance and Annual Startup . . . . . . . . . . . . . . . . . . 53

Address Report Problems . . . . . . . . . . . . . . . . . . . . . 54

Inspect Water Heater Interior . . . . . . . . . . . . . . . . . . . 54

Clean Condensate Trap . . . . . . . . . . . . . . . . . . . . . . . 54

Check All Piping for Leaks . . . . . . . . . . . . . . . . . . . . . 54

Flue Vent System and Air Piping . . . . . . . . . . . . . . . . 55

Check Water System . . . . . . . . . . . . . . . . . . . . . . . . . 55

Check Expansion Tank . . . . . . . . . . . . . . . . . . . . . . . . 55

Check Water Heater Relief Valve . . . . . . . . . . . . . . . 55

Inspect Ignition & Flame Sense Electrodes . . . . . . . . 56

Check Ignition Ground Wiring . . . . . . . . . . . . . . . . . . 56

Check All Water Heating Wiring . . . . . . . . . . . . . . . . . 56

Check Control Settings . . . . . . . . . . . . . . . . . . . . . . . 56

Perform Startup & Checks . . . . . . . . . . . . . . . . . . . . . 56

Check Burner Flames . . . . . . . . . . . . . . . . . . . . . . . . 56

Check Flame Signal . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Review with Owner . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Handling Ceramic Fiber Materials . . . . . . . . . . . . . . . 57

Cleaning Water Heater Heat Exchanger . . . . . . . . . . 57

Oiled Bearing Circulators . . . . . . . . . . . . . . . . . . . . . . 57

13. TROUBLESHOOTING

Before Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Troubleshooting Chart - No Display . . . . . . . . . . . . . . 59

Checking Temperature Sensors . . . . . . . . . . . . . . . . . 60

Troubleshooting Chart - Noisy System . . . . . . . . . . . 61

Troubleshooting Chart - Fault Messages Displayed . 62-67

Combustion Analysis Procedure . . . . . . . . . . . . . . . . . . . 68

Gas Valve Adjustment Procedure . . . . . . . . . . . . . . . . . . 69

14. DIAGRAMS

Ladder Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

Please read before proceeding

Installer – Read all instructions, in this manual before installing. Perform steps in the order given.

Have this water heater 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.

Failure to adhere to the guidelines on this page can result in severe personal injury, death, or substantial property damage.

Water heater operation –

• Do not block flow of combustion or ventilation air to the water heater.

• 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 water heater 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.

When calling or writing about the water heater – Please have the water heater model and serial number from the water heater rating plate.

Consider piping and installation when determining water heater 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.

If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death

-- Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

-- WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any phone in your building.

• Immediately call your gas supplier from a 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.

 WARNING

NOTICE

 WARNING

Installation & Service Manual

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.

When servicing the water heater –

• To avoid electric shock, disconnect electrical supply before performing maintenance.

• To avoid severe burns, allow the water heater to cool before performing maintenance.

The Shield - How it works...

1. Access cover - front

Provides access to the gas train and heat exchanger.

2. Air intake adapter

Allows for the connection of the PVC air intake pipe to the water heater.

3. Air pressure switch

The air pressure switch detects blocked inlet conditions.

4. Air shroud (500-125 Model Only_Not Shown)

The air shroud directs air and gas flow into the blower.

5. 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.

6. Burner (not shown)

Made with metal fiber and stainless steel construction, the burner uses pre-mixed air and gas and provides a 5 to 1 firing rate.

7. Condensate drain connection

Connects the condensate drain line to 1/2" PVC.

8. Electronic Control Module

The electronic control responds to internal and external signals and controls the blower, gas valve, and pumps to meet the demand.

9. Electronic display

The electronic display consists of 7 buttons and a dual line 32character liquid crystal display.

10. Flame inspection window

The quartz glass window provides a view of the burner surface and flame.

11. Flame sensor

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

12. Flue gas sensor (not shown)

This sensor monitors the flue gas exit temperature. The control module will modulate and shut down the water heater if the flue gas temperature gets too hot. This protects the flue pipe from overheating.

13. Gas connection pipe

Threaded pipe connection, either 1/2", 3/4", or 1", depending on the model. This pipe should be connected to the incoming gas supply for the purpose of delivering gas to the water heater.

14. Gas shutoff switch (150-100 - - 285-125 Models Only)

An electrical switch designed to cut power from the gas valve to prevent gas flow to the burner.

15. Gas shutoff valve (400-125 -- 500-125 Models Only)

Manual valve used to isolate the gas valve from the gas supply.

16. 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.

17. Heat exchanger access cover

Allows access to the combustion side of the heat exchanger coils.

18. Heat exchanger inlet temperature sensor

This sensor monitors the inlet water temperature to the heat exchanger.

19. Heat exchanger outlet temperature sensor

This sensor monitors heat exchanger outlet water temperature.

20. High limit sensor

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

21. Ignition electrode

Provides direct spark for igniting the burner.

22. Line voltage junction box

The junction box contains the connection points for the line voltage power.

23. Low voltage connection board

The connection board is used to connect external low voltage devices.

24. Low voltage wiring connections (knockouts)

Conduit entryway for the low voltage connection board.

25. Power cord

Six foot cord allows for quick connection to 120V supply.

26. Pump

Circulates water between the tank and the heat exchanger.

27. Pump relay

Switches power to the pump.

28. Relief valve discharge pipe

Protects the heat exchanger from over pressure and temperature conditions. The relief valve is set at 150 PSI.

29. Stainless steel heat exchanger

Allows 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.

30. Tank sensor

Used by the control to monitor the temperature of the tank.

31. Top panel

Removable panel to gain access to the internal components.

32. Vent pipe connection

Allows for the connection of the PVC/CPVC vent pipe system to the water heater.

33. Venturi

The venturi controls air and gas flow into the burner.

34. Water heater drain valve

Location from which the water heater can be drained.

35. Water inlet

Copper sweat connection for cold water supply that returns water from the system to the heat exchanger, either 1-1/2" or 2", depending on the model.

36. Water outlet

Male NPT water connection that supplies hot water to the system, either 1-1/2" or 2", depending on the model.

Installation & Service Manual

Front View - Models SNR150-100 -- SNA285-125

Left Side (inside unit) -- Models SNR150-100 SNA285-125

16 33

Right Side (inside unit) -- Models SNR150-100 - SNA285-125

The Shield - How it works... (continued)

Rear View - Models SNR150-100 -- SNA285-125

Models SNR150-100 -- SNA285-125

Installation & Service Manual

16 33

19 20

The Shield - How it works...

Rear View - Model SNA400-125

Rear View - Model SNA500-125

Right Side (inside unit) - Model SNA500-125

Right Side (inside unit) - Model SNA400-125

Model SNA400-125

Model SNA500-125

Installation & Service Manual

Ratings

Notes:

1. Shield water heaters require special gas venting. Use only the vent materials and methods specified in the Shield Installation and Service Manual.

2. Standard Shield water heaters are equipped to operate from sea level to 4,500 feet only with no adjustments. The water heater will de-rate by 4% for each 1,000 feet above sea level up to 4,500 feet.

3. High altitude Shield water heaters are equipped to operate from 3,000 to 12,000 feet only with no field adjustments. The water heater 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 models. A high altitude label (as shown in FIG. A) is also affixed to the unit.

Maximum allowed working pressure is located on the rating plate.

Model Number

Note: Change “N” to

“L” for L.P. gas models.

CSA

Input Modulation Btu/hr

(Note 2)

Water Content

Gallons

Water

Connections

Gas

Connections

Vent/Air Size

Min Max

(Note 1)

SNR150-100 30,000 - 150,000 92 1-1/2" 1/2" 3"

SNR200-100 40,000 - 199,999 93 1-1/2" 1/2" 3"

SNA285-125 57,000 - 285,000 124 2" 3/4" 4"

SNA400-125 80,000 - 399,999 125 2" 1" 4"

SNA500-125 100,000 - 500,000 126 2" 1" 4"

NOTICE

Figure A High Altitude Label Location

Installation & Service Manual

UNIT EQUIPPED FOR

HIGH ALTITUDE

3,000 FT. TO 12,000 FT.

The Shield water heater gas manifold and controls met safe lighting and other performance under tests specified in ANSI Z21.10.3 – latest edition.

Failure to keep water heater area clear and free of combustible materials, gasoline, and other flammable liquids and vapors can result in severe personal injury, death, or substantial property damage.

Installation must comply with:

• Local, state, provincial, and national codes, laws, regulations, and ordinances.

• National Fuel Gas Code, ANSI Z223.1 – latest edition.

• National Electrical Code.

• For Canada only: B149.1 Installation Code, CSA C22.1 Canadian Electrical Code Part 1 and any local codes.

Before locating the water heater, check:

1. Check for nearby connection to:

• 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. 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 water heater. Remove any

combustible materials, gasoline and other flammable liquids.

4. The Shield water heater must be installed so that gas

control system components are protected from dripping or spraying water or rain during operation or service.

 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.

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 water heater without removing it from the space.

Closet and alcove installations

This appliance requires a special venting system. The vent connection to the appliance must be made with the CPVC pipe section installed in 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.

For closet and alcove installations as shown in FIG.’s 1-1 and 1-2, CPVC 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.

 WARNING

NOTICE

 WARNING

1 Determine water heater location

Installation & Service Manual

A closet is any room the water heater is installed in which is less than 455 cubic feet for SNR150-100 and SNR200-100 models and 671 cubic feet for the SNA285-125 through SNA500-125 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 = 6 feet long, 6 feet wide, and 9 foot ceiling = 6 x 6 x 9 = 324 cubic feet. This would be considered a closet for a Shield Water Heater.

OPEN FRONT

1" MINIMUM CLEARANCE

AROUND HOT WATER

PIPES AND VENT PIPE

Figure 1-2 Alcove Installation - Minimum Required Clearances

Figure 1-1 Closet Installation - Minimum Required Clearances

 WARNING

For closet installations, CPVC 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.

1 Determine water heater location (continued)

RECOMMENDED SERVICE CLEARANCES:

Top - 18" (457 mm) Right Side - 24" (610 mm) Front - 24" (610 mm)

RECOMMENDED SERVICE CLEARANCES:

Top - 18" (457 mm) Right Side - 24" (610 mm) Front - 24" (610 mm)

Installation & Service Manual

 WARNING

For alcove installations, CPVC 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.

1" MINIMUM CLEARANCE

AROUND HOT WATER PIPES AND VENT PIPE

VENTILATING AIR OPENING

CLOSED DOOR

VENTILATING AIR OPENING

AREAOF EACH OPE

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

NING

Do not install the water heater on carpeting even if foundation is used. Fire can result, causing severe personal injury, death, or substantial property damage.

When local codes require compliance with NSF 5, the heater must be sealed to the floor with a food grade silicone to prevent debris and harborage of vermin under the heater.

If flooding is possible, elevate the water heater sufficiently to prevent water from reaching the water heater.

Flooring and foundation

Flooring

The Shield water heater is approved for installation on combustible flooring, but must never be installed on carpeting.

Prevent combustion air contamination

Install air inlet piping for the Shield water heater as described in this manual. Do not terminate vent/air in locations that can allow contamination of combustion air. Refer to Table 1A, for products and areas which may cause contaminated combustion air.

Ensure that the combustion air will not contain any of the contaminants in Table 1A. Contaminated combustion air will damage the water heater, 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.

 WARNING

1 Determine water heater location

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

Table 1A Corrosive Contaminants and Sources

Remove water heater from wood pallet

1. Remove the sides and the top of the crate.

2. Remove the blocks on the base of the crate to allow for easier removal.

3. The water heater can then be slid off the base of the crate for installation.

Do not drop the water heater or bump the jacket on the floor or pallet. Damage to the water heater can result.

NOTICE

Installation & Service Manual

When removing a water heater from existing common vent system:

Do not install the Shield water heater 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 in flue gas spillage and carbon monoxide emissions, causing severe personal injury or death.

At the time of removal of an existing water heater, 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.

 DANGER

 WARNING

1 Determine water heater location (continued)

Combustion and ventilation air requirements for appliances drawing air from the equipment room

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.

The equipment room MUST be provided with properly sized openings to assure adequate combustion air and proper ventilation.

Maintain minimum specified clearances for adequate operation. All installations must allow sufficient space for servicing the vent connections, water pipe connections, piping and other auxiliary equipment, as well as the appliance. The clearance labels on each appliance note the same service and combustible clearance requirements as shown above.

Multiple appliances may be installed in a modular water heater installation. Multiple appliances may be installed side by side with no clearance between adjacent appliances because this appliance is approved for zero clearance from combustible surfaces.

Consult the Ve nt i ng section of this manual for specific installation instructions for the appropriate type of venting system that you will be using.

Installation & Service Manual

1 Determine water heater location

Figure 1-3_Combustion Air Direct from Outside

1. If air is taken directly from outside the building with no duct, provide two permanent openings to the equipment room (see FIG. 1-3):

(a) Combustion air opening, with a minimum free

area of one square inch per 4000 Btu/hr input (5.5 cm

per kW). This opening must be located within 12" (30 cm) of the bottom of the enclosure.

(b) Ventilation air opening, with a minimum free

area of one square inch per 4000 Btu/hr input (5.5 cm

per kW). This opening must be located within 12" (30 cm) of the top of the enclosure.

Figure 1-4_Combustion Air Through Ducts

2. If combustion and ventilation air is taken from the outdoors using a duct to deliver the air to the equipment room, each of the two openings should be sized based on a minimum free area of one square inch per 2000 Btu/hr (11 cm

per kW) of input (see FIG. 1-4).

Figure 1-6_Combustion Air from Outside - Single Opening

3. If air is taken from another interior space, each of the two openings specified above should have a net free area of one square inch for each 1000 Btu/hr (22 cm

per kW) of input, but not less than 100 square inches (645 cm2) (see FIG. 1-5).

4. If a single combustion air opening is provided to bring combustion air in directly from the outdoors, the opening must be sized based on a minimum free area of one square inch per 3000 Btu/hr (7 cm2per kW). This opening must be located within 12" (30 cm) of the top of the enclosure (see FIG. 1-6).

Figure 1-5_Combustion Air from Interior Space

Installation & Service Manual

IF NECESSARY FOR

TIGHT CONSTRUCTION

1 Determine water heater location (continued)

TABLE - 1B

MINIMUM RECOMMENDED COMBUSTION

AIR SUPPLY TO EQUIPMENT ROOM

Model

Number

FIG. 1-3 FIG. 1-4 FIG. 1-5 FIG. 1-6

*Outside Air from

2 Openings Directly from

Outdoors

*Outside Air from

2 Ducts Delivered from

Outdoors

**Inside Air from

2 Ducts Delivered from Interior

Space

*Outside Air from 1 Opening Directly from Outdoors, in

To p

Opening, in

Bottom

Opening, in

To p

Opening, in

Bottom

Opening, in

To p

Opening, in

Bottom

Opening, in

SNR150-100

(246 cm2)

(484 cm2)

150

(968 cm2)

150

(968 cm2)

(323 cm2)

SNR200-100

(323 cm

)

(323 cm

)

100

(646 cm

)

100

(646 cm

)

200

(1,291 cm

)

200

(1,291 cm

)

(433 cm

)

SNA285-125

(465 cm2)72(465 cm2)

143

(923 cm2)

143

(923 cm2)

285

(1,839 cm2)

285

(1,839 cm2)

(613 cm2)

SNA400-125

100

(646 cm2)

100

(646 cm2)

200

(1,291 cm2)

200

(1,291 cm2)

400

(2,581 cm2)

400

(2,581 cm2)

134

(865 cm2)

SNA500-125

125

(807 cm2)

125

(807 cm2)

250

(1,613 cm2)

250

(1,613 cm2)

500

(3,226 cm2)

500

(3,226 cm2)

167

(1,078 cm

)

*Outside air openings shall directly communicate with the outdoors. When combustion air is drawn from the outside through a duct, the net free area of each of the two openings must have twice (2 times) the free area required for Outside Air/2 Openings. The above requirements are for the water heater only; additional gas fired appliances in the equipment room will require an increase in the net free area to supply adequate combustion air for all appliances.

**Combined interior space must be 50 cubic feet per 1,000 Btu/hr input. Buildings MUST NOT be of *“Tight Construction”. For buildings of *“Tight Construction”, provide air openings into the building from outside.

*No combustion air openings are needed when the water heater is installed in a space with a volume NO LESS than 50 cubic feet per 1,000 Btu/hr of all installed gas fired appliances. Buildings MUST NOT be of *“Tight Construction”.

*”Tight Construction” is defined as a building with less than 0.40 ACH (air changes per hour).

The result is improper combustion and a non-warrantable, premature appliance failure.

EXHAUST FANS: Any fan or equipment which exhausts air from the equipment room may deplete the combustion air supply and/or cause a downdraft in the venting system. Spillage of flue products from the venting system into an occupied living space can cause a very hazardous condition that must be immediately corrected. If a fan is used to supply combustion air to the equipment room, the installer must make sure that it does not cause drafts which could lead to nuisance operational problems with the appliance.

Combustion air requirements are based on the latest edition of the National Fuel Gas Code, ANSI Z223.1; in Canada refer to the latest edition of CGA Standard CAN B149.1. Check all local code requirements for combustion air.

All dimensions based on net free area in square inches. Metal louvers or screens reduce the free area of a combustion air opening a minimum of approximately 25%. Check with louver manufacturers for exact net free area of louvers. Where two openings are provided, one must be within 12" (30cm) of the ceiling and one must be within 12" (30cm) of the floor of the equipment room. Each opening must have net free area as specified in the chart above (Table 1B). Single openings shall commence within 12" (30cm) of the ceiling.

 CAUTION

Under no circumstances should the equipment room ever be under negative pressure. Particular care should be taken where exhaust fans, attic fans, clothes dryers, compressors, air handling units, etc., may take away air from the unit.

The combustion air supply must be completely free of any flammable vapors that may ignite or chemical fumes which may be corrosive to the appliance. Common corrosive chemical fumes which must be avoided are fluorocarbons and other halogenated compounds, most commonly present as refrigerants or solvents, such as Freon, trichlorethylene, perchlorethylene, chlorine, etc. These chemicals, when burned, form acids which quickly attack the stainless steel heat exchanger, headers, flue collectors, and the vent system.

Installation & Service Manual

Figure 2-1 Vertical Direct Venting (Two-Pipe Vertical

Termination) - See page 25 for more details

Figure 2-2 Sidewall Direct Venting (Two-Pipe Sidewall Termination) - See page 18 for more details

Figure 2-3 Concentric Vertical Termination - See page 27 for more details

Figure 2-4 Concentric Sidewall Termination - See page 22 for more details

Direct venting options

2 General venting

Installation & Service Manual

Vent piping materials

Use only the materials listed in Table 2A below 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.

Table 2A Vent Pipe and Fittings

Venting and combustion air

 DANGER

The Shield water heater 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.

All 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 water heater (to allow drainage of condensate).

 WARNING

NOTICE

 WARNING

For closet and alcove installations, CPVC material MUST BE used in a closet/alcove structure. Failure to follow this warning could result in fire, personal injury, or death.

NOTICE

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 certified vent material to comply with this requirement.

4. The 3" Concentric Vent Kit available from Lochinvar (see Section 3 – Sidewall Termination – Optional Concentric Ve n t) and the 3" Concentric Vent Kit available from IPEX are both approved for use on the Shield Water Heater. Both kits are listed to the ULC-S636 standard for use in Canada.

All vent pipe materials and fittings must comply with the following:

Item Material

Standards for installation in:

United States Canada

Vent pipe and fittings

PVC schedule 40 ANSI/ASTM D1785

CPVC and PVC venting must be

ULC-S636 Certified. IPEX is an

approved manufacturer in Canada

supplying vent material listed to

ULC-S636.

PVC-DWV ANSI/ASTM D2665

CPVC schedule 40 ANSI/ASTM F441

Pipe cement/primer

PVC ANSI/ASTM D2564

IPEX System 636

Cements & Primers

CPVC ANSI/ASTM F493

NOTICE: DO NOT USE CELLULAR (FOAM) CORE PIPE

2 General venting (continued)

Installation & Service Manual

Air intake/vent connections

1. Combustion Air Intake Connector (FIG.’s 2-5 and 2-6)

- 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 2-5 and 2-6) - 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.

VENT

AIR

3" CPVC PIPE INSTALLED IN THE WATER HEATER MUST BE USED FOR VENT CONNECTION

NOTE: CPVC VENT PIPE AND VENT FITTINGS MUST BE USED IN CLOSET AND ALCOVE INSTALLATIONS.

Figure 2-5 Near Water Heater Venting Models SNR150-100 - SNR200-100

Figure 2-6 Near Water Heater Venting Models SNA285-125 - SNA500-125

The Shield water heater uses model specific combustion air intake and vent piping sizes as detailed in Table 2B below.

Model Air Intake Vent

SNR150-100 -- SNR200-100 3 inches 3 inches

SNA285-125 -- SNA500-125 4 inches 4 inches

Table 2B Air Intake/Vent Piping Sizes

Increasing or decreasing combustion air or vent piping is not authorized.

NOTICE

2 General 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.

*Plastic pipe may require an adapter (not provided) to transition between the air inlet connection on the appliance and the plastic air inlet pipe.

Installation & Service Manual

Models SNA400-125 and SNA500-125 will de-rate 1.75% per 25 feet of vent when installed as direct vent or 0.75% per 25 feet of vent when drawing combustion air from the room.

Models SNR150-100 through SNA285-125 will de-rate up to 1% per 25 feet of vent pipe when installed as direct vent, but will not de-rate when drawing combustion air from the room.

AIR

VENT

4" CPVC PIPE INSTALLED IN THE WATER HEATER MUST BE USED FOR VENT CONNECTION

NOTE: CPVC VENT PIPE AND VENT FITTINGS MUST BE USED IN CLOSET AND ALCOVE INSTALLATIONS.

2 General venting (continued)

Vent, air piping and termination:

The Shield water heater 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.

Air contamination

Pool and laundry products and common household and hobby products often contain fluorine or chlorine compounds. When these chemicals pass through the water heater, they can form strong acids. The acid can eat through the water heater wall, causing serious damage and presenting a possible threat of flue gas spillage or appliance water leakage into the building.

Please read the information given in Table 1A, page 10, listing contaminants and areas likely to contain them. If contaminating chemicals will be present near the location of the water heater combustion air inlet, have your installer pipe the water heater combustion air and vent to another location, per this manual.

If the water heater 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 10 before installing the water heater or air inlet piping.

If contaminants are found, you MUST:

• Remove contaminants permanently. —OR—

• Relocate air inlet and vent terminations to other areas.

Removing from existing vent

Follow the instructions in Section 1, page 11 of this manual when removing a water heater from an existing vent system.

Vent and air piping

Vent and air system:

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 may use any of the vent/air piping methods covered in this manual. Do not attempt to install the Shield water heater using any other means.

DO NOT mix components from different systems. The vent system could fail, causing leakage of flue products into the living space. Use only PVC or CPVC and fittings, with primer and cement specifically designed for the material used.

NOTICE

 WARNING

Model

Kit

Number

Equivalent

Vent Length

SNR150-100 -- SNR200-100 CVK3003 3 feet

SNA285-125 CVK3007 3 feet

SNA400-125 CVK3007 5 feet

SNA500-125 CVK3007 30 feet

Table 2C Equivalent Vent Lengths

Minimum / Maximum allowable combustion air and vent piping lengths are as follows:

Ve n t = 12 equivalent feet minimum / 100 equivalent feet maximum

Combustion Air (when used) = 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.

Installation & Service Manual

3 Sidewall direct venting

Vent/air termination – sidewall

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.

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

 WARNING

Do not connect any other appliance to the vent pipe or multiple water heaters to a common vent pipe. 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:

1. The total length of piping for vent or air must not exceed the limits given in the General Venting Section on page 17 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 3-1A Sidewall Termination of Air and Vent

Model Kit Number Vent Size

SNR150-100 -- SNR200-100 KIT30045 3 inch vent

SNA285-125 -- SNA500-125 KIT30046 4 inch vent

Table 3A Sidewall Vent Kits

Do not exceed the maximum lengths of the outside vent piping shown in FIG. 3-1B. Excessive length exposed to the outside could cause freezing of condensate in the vent pipe, resulting in potential water heater shutdown.

Figure 3-1B Alternate Sidewall Termination of Air and Vent w/Field Supplied Fittings

 WARNING

If using the alternate sidewall termination:

3. The air piping must terminate in a down-turned elbow as shown in FIG. 3-1B. 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.3-1B.

Installation & Service Manual

TO BOILER INTAKE AIR

CONNECTION

FROM BOILER

VENT PIPE

CONNECTION

POSSIBLE ORIENTATIONS

VENT / AIR

TERMINATION

GRADE OR

SNOW LINE

12"

MIN

TO OVERHANG

12"

MIN

Vent/air termination – sidewall

3 Sidewall direct venting (continued)

VENT / AIR

TERMINATION

12"

MIN.

12"

MIN.

12"

MIN.

Figure 3-2 Clearance to Gravity Air Inlets

FORCED AIR

INLET

VENT / AIR

TERMINATION

7' MIN. ABOVE ANY

PUBLIC WALKWAY

IF LESS

THAN 10’

36"

MIN.

Figure 3-3A Clearance to Forced Air Inlets

5. Maintain clearances as shown in FIG.’s 3-1A thru 3-3B, pages 18 and 19. 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.

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 3-1C Alternate Venting Arrangement (if Space Allows) w/Field Supplied Fittings

Figure 3-2B Alternate Clearance to Gravity Air Inlets w/Field Supplied Fittings

Figure 3-3B Alternate Clearance to Forced Air Inlets w/Field Supplied Fittings

Installation & Service Manual

FROM BOILER

VENT PIPE

CONNECTION

TO BOILER INTAKE AIR

CONNECTION

BIRD

SCREEN

ALTERNATE VENTING ARRANGEMENT

(IF SPACE PERMITS)

COUPLING

12” MIN 15” MAX

BIRD SCREEN

12”

MIN

3 Sidewall direct venting

VENT PIPING

GALVANIZED

THIMBLE

VENT CAP

AIR PIPING

WALL PLATE

VENT PLATE

Figure 3-4A Sidewall Termination Assembly

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 glue (cement/primer) listed in Table 2A on page 15 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.

4. Assemble the vent cap to the vent plate (see FIG. 3-4A). 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 3-4B Alternate Sidewall Termination Assembly w/Field Supplied Fittings

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. 3-4B.

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.

Termination and fittings

1. The air termination coupling must be oriented at least 12 inches above grade or snow line as shown in FIG. 3-1A, page 18.

2. Maintain the required dimensions of the finished termination piping as shown in FIG. 3-1A, page 18.

3. If using the alternate sidewall termination do not extend exposed vent pipe outside of the building more than what is shown in this document. Condensate could freeze and block vent pipe.

Installation & Service Manual

3 Sidewall direct venting (continued)

Vent/air termination – sidewall

All vent pipes and air inlets must terminate at the same height to avoid possibility of severe personal injury, death, or substantial property damage.

Multiple vent/air terminations

1. When terminating multiple Shield water heaters terminate each vent/air connection as described in this manual (FIG. 3-5A).

 WARNING

2. Place wall penetrations to obtain minimum clearance of 12 inches between edge of air inlet and adjacent vent outlet, as shown in FIG. 3-5A for U.S. installations. For Canadian installations, provide clearances required by CSA B149.1 Installation Code.

3. The air inlet of a Shield water heater is part of a direct vent connection. It is not classified as a forced air intake with regard to spacing from adjacent water heater vents.

12" MIN. BETWEEN EDGE OF AIR

INLET AND ADJACENT VENT OUTLET

VENT / AIR

TERMINATION

VENT

AIR

Figure 3-5A Multiple Vent Terminations (must also comply with Figure 3-1A)

Figure 3-5B Alternate Multiple Vent Terminations w/Field Supplied Fittings (must also comply with Figure 3-1B)

Installation & Service Manual

3 Sidewall direct venting

Figure 3-7 Kit Contents_CVK3003 - SNR150-100 -SNR200-100

Sidewall termination installation

1. Determine the best location for the termination kit (see FIG. 3-6).

2. The total length of piping for vent or air must not exceed the limits given in the General Venting section on page 17 of this manual.

3. 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.

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.

4. Cut one (1) hole (5 inch diameter for #CVK3003 installations or 7 inch diameter for #CVK3007 installations) into the structure to install the termination kit.

5. Partially assemble the concentric vent termination kit. Clean and cement using the procedures found in these instructions.

a. Cement the Y concentric fitting to the larger kit pipe

(FIG.’s 3-7 and 3-8).

b. Cement the rain cap to the smaller diameter kit pipe

(FIG.’s 3-7 and 3-8).

Figure 3-8 Kit Contents_CVK3007 - SNA285-125 -SNA500-125

Sidewall termination – optional concentric vent

Description and usage

Lochinvar offers optional concentric combustion air and vent pipe termination kits (Factory Kit #CVK3003 for 3" diameter Models SNR150-100 - SNR200-100 and #CVK3007 for 4" diameter - Models SNA285-125 - SNA500-125). Both combustion air and vent pipes must attach to the termination kit. The termination kits must terminate outside the structure and must be installed as shown in FIG. 3-6.

The required combustion vent pipe materials are listed in Table 2A, on page 15 of this manual.

Figure 3-6 Concentric Sidewall Termination

Installation & Service Manual

RAIN CAP

6" (152 MM) TO 4" (102 MM) REDUCER

6" (152 MM) DIA.

4" (102 MM) DIA.

"Y" CONCENTRIC FITTING

6" (152 MM) DIA.

"FLEXIBLE" PIPE COUPLING

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