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SWH-I-S Rev D
TM
Installation & Service
Manual
Models: SNR150-100, SNR200-100,
SNA285-125, SNA400-125, AND
SNA500-125
WARNING: 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;
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Contents PLEASE READ BEFORE PROCEEDING . . . . . . . . . . . 3 10. START-UP Hazard Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Check for Gas Leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 THE SHIELD -- HOW IT WORKS . . . . . . . . . . . . . . . . . 4-6 Inspect/fill Condensate System . . . . . . . . . . . . . . . . . . . . 43 RATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Final Checks Before Starting the Water Heater .
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TM Installation & Service Manual Please read before proceeding 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 indicates an imminently hazardous situation which, if not avoided, will result in death or serious DANGER injury. WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or se
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TM Installation & Service Manual The Shield - How it works... 1. Access cover - front 18. Heat exchanger inlet temperature sensor Provides access to the gas train and heat exchanger. This sensor monitors the inlet water temperature to the heat exchanger. 2. Air intake adapter Allows for the connection of the PVC air intake pipe to 19. Heat exchanger outlet temperature sensor the water heater. This sensor monitors heat exchanger outlet water temperature. 3. Air pressure switch 20. High limit s
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TM Installation & Service Manual The Shield - How it works... (continued) Models SNR150-100 -- SNA285-125 31 24 25 2 1 35 13 32 9 28 7 36 34 Front View - Models SNR150-100 -- SNA285-125 Rear View - Models SNR150-100 -- SNA285-125 14 23 13 5 2 2 14 23 29 13 16 22 33 18 5 25 21 16 29 33 10 27 17 28 17 8 11 3 9 9 26 19 20 30 Left Side (inside unit) -- Models SNR150-100 - Right Side (inside unit) -- Models SNR150-100 - SNA285-125 SNA285-125 5
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TM Installation & Service Manual The Shield - How it works... Model SNA400-125 31 5 15 23 2 8 16 13 33 22 17 35 29 35 26 9 32 7 36 30 34 Rear View - Model SNA400-125 Right Side (inside unit) - Model SNA400-125 Model SNA500-125 15 16 5 23 24 2 8 15 25 25 17 29 27 35 32 9 3 28 26 7 36 34 Right Side (inside unit) - Model SNA500-125 Rear View - Model SNA500-125 6
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TM Installation & Service Manual Ratings CSA Model Number Input Modulation Btu/hr Water Content Water Gas Vent/Air Size Note: Change “N” to Gallons Connections Connections (Note 2) “L” for L.P. gas models. (Note 1) Min Max 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" Maximum allowed working pressure is located on the rating p
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TM Installation & Service Manual 1 Determine water heater location This appliance is certified as an indoor Installation must comply with: WARNING appliance. Do not install the appliance � Local, state, provincial, and national codes, laws, outdoors or locate where the appliance will regulations, and ordinances. be exposed to freezing temperatures or to � National Fuel Gas Code, ANSI Z223.1 – latest edition. temperatures that exceed 100°F. � National Electrical Code. Failure to install the a
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TM Installation & Service Manual 1 Determine water heater location (continued) Figure 1-1 Closet Installation - Minimum Required Clearances 1" MINIMUM CLEARANCE AROUND HOT WATER For closet installations, CPVC PIPES AND VENT PIPE WARNING 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. 6" VENTILATING AIR OPENING CLOSED DOOR VENTILATING AIR OPENING 6" RECOMMENDED SERVICE CLEARANCES: Top -
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TM Installation & Service Manual 1 Determine water heater location Flooring and foundation Table 1A Corrosive Contaminants and Sources Flooring Products to avoid: The Shield water heater is approved for installation on Spray cans containing chloro/fluorocarbons combustible flooring, but must never be installed on carpeting. Permanent wave solutions Do not install the water heater on carpeting WARNING Chlorinated waxes/cleaners even if foundation is used. Fire can result, causing severe perso
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TM Installation & Service Manual 1 Determine water heater location (continued) Maintain minimum specified clearances for adequate When removing a water heater from operation. All installations must allow sufficient space for existing common vent system: servicing the vent connections, water pipe connections, piping Do not install the Shield water heater into and other auxiliary equipment, as well as the appliance. The DANGER a common vent with any other appliance. clearance labels on each a
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TM Installation & Service Manual 1 Determine water heater location 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 2 per 2000 Btu/hr (11 cm per kW) of input (see FIG. 1-4). 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 equipmen
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TM Installation & Service Manual 1 Determine water heater location (continued) TABLE - 1B MINIMUM RECOMMENDED COMBUSTION AIR SUPPLY TO EQUIPMENT ROOM FIG. 1-3 FIG. 1-4 FIG. 1-5 FIG. 1-6 *Outside Air from *Outside Air from **Inside Air from Model 2 Openings Directly from 2 Ducts Delivered from 2 Ducts Delivered from Interior *Outside Air from Number Outdoors Outdoors Space 1 Opening Directly 2 Top Bottom Top Bottom Top Bottom from Outdoors, in 2 2 2 2 2 2 Opening, in Opening, in Opening, in Ope
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TM Installation & Service Manual 2 General venting Direct venting options Figure 2-1 Vertical Direct Venting (Two-Pipe Vertical Figure 2-2 Sidewall Direct Venting (Two-Pipe Sidewall Termination) - See page 25 for more details Termination) - See page 18 for more details Figure 2-4 Concentric Sidewall Termination - See page Figure 2-3 Concentric Vertical Termination - See 22 for more details page 27 for more details 14
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TM Installation & Service Manual 2 General venting (continued) Venting and combustion air The Shield water heater must be vented and All vent pipes must be glued, properly NOTICE DANGER supplied with combustion and ventilation supported, and the exhaust must be pitched air as described in this section. Ensure the a minimum of a 1/4 inch per foot back to the vent and air piping and the combustion air water heater (to allow drainage of supply comply with these instructions condensate). regard
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TM Installation & Service Manual 2 General venting Air intake/vent connections Figure 2-6 Near Water Heater Venting Models SNA285-125 - SNA500-125 1. Combustion Air Intake Connector (FIG.’s 2-5 and 2-6) - Used to provide combustion air directly to the unit AIR 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, VENT Section 305, Table 305.4 or as local codes dictate. 2. Vent
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TM Installation & Service Manual 2 General venting (continued) Vent, air piping and termination: Minimum / Maximum allowable combustion air and vent piping lengths are The Shield water heater vent and air piping can be installed as follows: through the roof or through a sidewall. Follow the procedures in this manual for the method chosen. Refer to the information Vent = 12 equivalent feet minimum / 100 equivalent feet in this manual to determine acceptable vent and air piping maximum length.
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TM Installation & Service Manual 3 Sidewall direct venting f. Do not terminate above any door or window. Vent/air termination – sidewall Condensate can freeze, causing ice formations. g. Locate or guard vent to prevent condensate damage Follow instructions below when to exterior finishes. WARNING determining vent location to avoid Figure 3-1A Sidewall Termination of Air and Vent possibility of severe personal injury, TO BOILER death, or substantial property damage. INTAKE AIR CONNECTION A
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TM Installation & Service Manual 3 Sidewall direct venting (continued) Vent/air termination – sidewall Figure 3-1C Alternate Venting Arrangement (if Space Figure 3-2B Alternate Clearance to Gravity Air Inlets Allows) w/Field Supplied Fittings w/Field Supplied Fittings TO BOILER INTAKE AIR COUPLING CONNECTION 12” MIN 15” MAX FROM BOILER VENT PIPE CONNECTION BIRD SCREEN 12” MIN BIRD SCREEN ALTERNATE VENTING ARRANGEMENT (IF SPACE PERMITS) 5. Maintain clearances as shown in FIG.’s 3-1A thru 3-3B,
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TM Installation & Service Manual 3 Sidewall direct venting Prepare wall penetrations Prepare wall penetrations (Alternate - 1. Use the factory supplied wall plate as a template to locate Field Supplied Option) the vent and air intake holes and mounting holes. 1. Air pipe penetration: Air pipe penetration: a. Cut a hole for the air pipe. Size the air pipe hole as a. Cut a hole for the air pipe. Size the air pipe hole as close as desired to the air pipe outside diameter. close as desired t
