Table of Contents
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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; 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.
Installation & Service
Manual
Models: SNR150-100, SNR200-100,
SNA285-125, SNA400-125, AND
SNA500-125
This manual must only be used by
WARNING
a qualified heating installer / service
technician.
this 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.
SWH-I-S Rev K
TM
Read all instructions in
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Table of Contents
Troubleshooting
Related Manuals for Lochinvar Shield SNR150-100
Summary of Contents for Lochinvar Shield SNR150-100
- Page 1 SWH-I-S Rev K 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.
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Page 2: Table Of Contents
Contents PLEASE READ BEFORE PROCEEDING ...... 3 8. CONDENSATE DISPOSAL Hazard Definitions ............3 Condensate Drain ............46 THE SHIELD -- HOW IT WORKS ....... 4-6 9. START-UP RATINGS ................. 7 Check for Gas Leaks ............47 1. DETERMINE WATER HEATER LOCATION Inspect/fill Condensate System ........ -
Page 3: Please Read Before Proceeding
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. -
Page 4: The Shield - How It Works
Installation & Service Manual The Shield - How it works... Access cover - front 19. Heat exchanger outlet temperature sensor Provides access to the gas train and heat exchanger. This sensor monitors heat exchanger outlet water temperature. Air intake adapter 20. - Page 5 The Shield - How it works... (continued) Models SNR150-100 -- SNA285-125 Front View - Models SNR150-100 -- SNA285-125 Rear View - Models SNR150-100 -- SNA285-125 Left Side (inside unit) -- Models SNR150-100 - Right Side (inside unit) -- Models SNR150-100 - SNA285-125 SNA285-125...
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Page 6: The Shield -- How It Works
Installation & Service Manual The Shield - How it works... Model SNA400-125 Rear View - Model SNA400-125 Right Side (inside unit) - Model SNA400-125 Model SNA500-125 Rear View - Model SNA500-125 Right Side (inside unit) - Model SNA500-125... -
Page 7: Ratings
Water Vent/Air Size Input Modulation Btu/hr Note: Change “N” Gallons Connections Connections to “L” for L.P. gas (Note 2) models. (Note 1) SNR150-100 30,000 - 150,000 1-1/2" 1/2" 3" SNR200-100 40,000 - 199,999 1-1/2" 1/2" 3" SNA285-125 57,000 - 285,000 2"... -
Page 8: Determine Water Heater Location
A closet is any room the water heater is installed in which Check for nearby connection to: is less than 455 cubic feet for SNR150-100 and SNR200- • Water piping 100 models and 671 cubic feet for the SNA285-125 through •... - Page 9 Installation & Service Manual Determine water heater location (continued) Figure 1-1 Closet Installation - Minimum Required Clearances For closet installations, CPVC, 1/4” (6.35 MM) WARNING MINIMUM CLEARANCE polypropylene or stainless steel AROUND HOT WATER PIPES vent material MUST BE used in 1”...
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Page 10: Flooring And Foundation
Installation & Service Manual Determine water heater location Flooring and foundation Table 1A Corrosive Contaminants and Sources Products to avoid: Flooring Spray cans containing chloro/fluorocarbons The Shield water heater is approved for installation on combustible flooring, but must never be installed on carpeting. Permanent wave solutions Do not install the water heater on carpeting WARNING... -
Page 11: Using An Existing Vent System To Install A New Water Heater
Installation & Service Manual Determine water heater location (continued) When removing a water heater from When using an existing vent system to existing common vent system: install a new water heater: Failure to follow all instructions can result Do not install the Shield water heater WARNING DANGER in flue gas spillage and carbon monoxide... -
Page 12: Removing Water Heater From Existing Common Vent . 11 Combustion & Ventilation Air Requirements
Installation & Service Manual Determine water heater location Maintain minimum specified clearances for adequate If air is taken directly from outside the building operation. All installations must allow sufficient space for with no duct, provide two permanent openings to servicing the vent connections, water pipe connections, piping the equipment room (see FIG. - Page 13 1 Opening Directly Bottom Bottom Bottom from Outdoors, in Opening, in Opening, in Opening, in Opening, in Opening, in Opening, in SNR150-100 (246 cm (246 cm (484 cm (484 cm (968 cm (968 cm (323 cm SNR200-100 (323 cm (323 cm...
- Page 14 Installation & Service Manual Determine water heater location The combustion air supply must be completely free of any Combustion air requirements are based on the latest edition flammable vapors that may ignite or chemical fumes which of the National Fuel Gas Code, ANSI Z223.1; in Canada refer may be corrosive to the appliance.
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Page 15: General Venting
Installation & Service Manual General venting Direct venting options - Sidewall Vent Figure 2-2 PVC/CPVC Concentric Sidewall Termination Figure 2-1 Two-Pipe Sidewall Termination - See page - See page 27 for more details 23 for more details Direct venting options - Vertical Vent Figure 2-3 Two-Pipe Vertical Termination Figure 2-4 PVC/CPVC Concentric Figure... -
Page 16: Install Vent And Combustion Air Piping
Installation & Service Manual General venting Install vent and combustion air piping The Shield water heater must be vented and The Shield water heater vent and air piping can be installed DANGER supplied with combustion and ventilation through the roof or through a sidewall. Follow the procedures air as described in this section. -
Page 17: Requirements For Installation In Canada
EXAMPLE: 20 feet of PVC pipe + (4) 90° elbows + (2) 45° The 3" Concentric Vent Kit available from Lochinvar (see elbows + (1) concentric vent kit (CVK3003) = 49 equivalent Section 3 – Sidewall Termination – Optional Concentric feet of piping. -
Page 18: Materials
Installation & Service Manual General venting Materials Air inlet pipe materials: The PVC, CPVC, or ABS air inlet pipe should be cleaned and The air inlet pipe(s) must be sealed. Choose acceptable sealed with the pipe manufacturer’s recommended solvents combustion air inlet pipe materials from the following list: and standard commercial pipe cement for the material used. -
Page 19: Optional Room Air
Installation & Service Manual General venting (continued) Optional room air Air contamination Pool and laundry products and common household and hobby Optional room air is intended for NOTICE products often contain fluorine or chlorine compounds. When commercial applications. Combustion these chemicals pass through the water heater, they can form air piping to the outside is recommended strong acids. -
Page 20: Pvc/Cpvc
Installation & Service Manual General venting PVC/CPVC Work from the water heater to vent or air termination. Do not exceed the lengths given in this manual for the This product has been approved for use with the PVC/CPVC air or vent piping. vent materials listed in Table 3D. -
Page 21: Polypropylene
Installation & Service Manual General venting (continued) Polypropylene Use only the adapters and vent system listed WARNING in Tables 2E and 2F. DO NOT mix vent This product has been approved for use with polypropylene systems of different types or manufacturers. vent with the manufacturers listed in Table 2E. -
Page 22: Stainless Steel Vent
Installation & Service Manual General venting Stainless steel vent Installation of a stainless steel vent system NOTICE should adhere to the stainless steel vent This product has been approved for use with stainless steel manufacturer’s installation instructions using the manufacturers listed in Table 2G. supplied with the vent system. -
Page 23: Sidewall Direct Venting
1. The total length of piping for vent or air must not exceed Model Kit Number Vent Size the limits given in the General Venting Section on page 17 of this manual. SNR150-100 -- SNR200-100 KIT30045 3 inch vent You must consider the surroundings when terminating SNA285-125 -- SNA500-125... - Page 24 Installation & Service Manual Sidewall direct venting Vent/air termination – sidewall 6. Locate terminations so they are not likely to be damaged Figure 3-1C Alternate PVC/CPVC/SS/ Polypropylene Venting by foreign objects, such as stones or balls, or subject to Arrangement (if Space Allows) w/Field Supplied Fittings buildup of leaves or sediment.
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Page 25: Prepare Wall Penetrations
Installation & Service Manual Sidewall direct venting (continued) Figure 3-3B Alternate Clearance to Forced Air Inlets w/ Figure 3-4A PVC/CPVC Sidewall Termination Assembly Field Supplied Fittings IF LESS THAN 10’ 36” VENT MIN. FORCED AIR AIR PIPING CENTERLINE WIDTH INLET BIRD VENT PIPING SCREEN... - Page 26 Installation & Service Manual Sidewall direct venting Prepare wall penetrations (Alternate - Figure 3-5A Multiple Vent Terminations (must also Field Supplied Option) comply with Figure 3-1A) Air pipe penetration: 12" MIN. BETWEEN EDGE OF AIR Cut a hole for the air pipe. Size the air pipe hole as INLET AND ADJACENT VENT OUTLET close as desired to the air pipe outside diameter.
- Page 27 (Factory Kit #CVK3003 for 3" installations or 7 inch diameter for #CVK3007 diameter - Models SNR150-100 - SNR200-100 and #CVK3007 installations) into the structure to install the termination for 4" diameter - Models SNA285-125 - SNA500-125). Both kit.
- Page 28 Sidewall direct venting Sidewall termination – optional concentric vent Figure 3-9 Concentric Vent Dimensional Drawing - Figure 3-10 Concentric Vent Dimensional Drawing - Models SNR150-100 -- SNR200-100 / CVK3003 Models SNA285-125 -- SNA500-125 / CVK3007 "A" "B" DIA. "C" DIA.
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Page 29: Sidewall Direct Venting
Installation & Service Manual Sidewall direct venting (continued) Sidewall termination – optional concentric vent Figure 3-12 Concentric Vent Sidewall Attachment Note: CVK3003 shown for illustration purposes. Multiventing sidewall terminations DO NOT use field-supplied couplings CAUTION to extend pipes. Airflow restriction When two (2) or more direct vent appliances are vented will occur and may cause intermittent near each other, each appliance must be individually vented... -
Page 30: Vertical Direct Venting
Installation & Service Manual Vertical direct venting Vent/air termination – vertical Follow instructions below when determining Rooftop vent and air inlet terminations WARNING WARNING vent location to avoid possibility of severe must terminate in the same pressure zone, personal injury, death or substantial unless vertical vent sidewall air is set up as property damage. - Page 31 Installation & Service Manual Vertical direct venting (continued) Vent/air termination – vertical Prepare roof penetrations Figure 4-2 Vertical Terminations with Multiple Water Air pipe penetration: Heaters 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: Cut a hole for the vent pipe.
- Page 32 Description and usage 2. Cut one (1) hole (5 inch diameter for #CVK3003 installations Lochinvar offers an optional concentric combustion air and or 7 inch diameter for #CVK3007 installations) into the vent pipe termination kit. Both combustion air and vent structure to install the termination kit.
- Page 33 Installation & Service Manual Vertical direct venting (continued) Vertical termination – optional concentric vent Do not operate the appliance with DO NOT use field-supplied couplings WARNING CAUTION the rain cap removed or recirculation to extend pipes. Airflow restriction will of combustion products may occur. occur.
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Page 34: System Piping
Installation & Service Manual System piping System water piping methods 2. If this water heater is installed in a closed water supply system, such as the one having a backflow preventer in Observe a minimum of one inch clearance around all the cold water supply, provisions must be made to control un-insulated hot water pipes when openings around the pipes thermal expansion. -
Page 35: Water Chemistry
Installation & Service Manual System piping (continued) Piping components The following chart (Table 5A) details the relationship of water temperature and time with regard to scald injury Check valves: and may be used as a guide in determining the safest water temperature for your applications. -
Page 36: Piping Diagrams
Installation & Service Manual System piping Figure 5-2 Single Unit Please note that these illustrations are meant to show system piping concept only, the installer is responsible NOTICE for all equipment and detailing required by local codes. - Page 37 Installation & Service Manual System piping (continued) Figure 5-3 Multiple Units MIXING VALVE (IF REQUIRED, SEE PG. 35) Please note that these illustrations are meant to show system piping concept only, the installer is responsible NOTICE for all equipment and detailing required by local codes.
- Page 38 Installation & Service Manual System piping Figure 5-4 Two Temperature - Single Unit FLOW CHECK VALVE (TYPICAL) THERMOMETER (TYPICAL) 180° HOT WATER SUPPLY MIXING VALVE 140° HOT WATER SUPPLY COLD WATER SUPPLY LOW TEMPERATURE BUILDING RETURN BALL EXPANSION UNION VALVE TANK (TYPICAL) (TYPICAL)
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Page 39: Gas Connections Connecting Gas Supply Piping
4. Support piping with hangers, not by the water heater or its required. accessories. The gas valve and blower will not support 2. On Models SNR150-100 -- SNA285-125 install a manual WARNING the weight of the piping. Do not attempt to shutoff valve in the gas supply piping outside water heater support the weight of the piping with the jacket when required by local codes or utility requirements. -
Page 40: Natural Gas
Installation & Service Manual Gas connections Natural gas: Failure to apply pipe sealing compound as WARNING detailed in this manual can result in severe Pipe sizing for natural gas personal injury, death, or substantial property damage. 1. Refer to Table 6A for pipe length and diameter. Based on Shield water heaters are typically shipped rated water heater input (divide by 1,000 to obtain cubic WARNING... -
Page 41: Check Inlet Gas Supply
Installation & Service Manual Gas connections (continued) Table 6A Natural Gas Pipe Size Chart Natural Gas Pipe Capacity Chart Nominal Iron Pipe Length of Pipe in Straight Feet for 1/2 PSI Size (Inches) 1-1/4 1400 1-1/2 2150 1500 1210 1020 4100 2820 2260... -
Page 42: Gas Pressure
Installation & Service Manual Gas connections Gas pressure 17. Check burner performance by cycling the system while you observe burner response. The burner should ignite The gas pressure must remain between 4 inches w.c. (natural), promptly. Flame pattern should be stable. Turn system 8 inches w.c. -
Page 43: Field Wiring
Installation & Service Manual Field wiring Installation must comply with: ELECTRICAL SHOCK HAZARD – For WARNING your safety, turn off electrical power supply 1. National Electrical Code and any other national, state, before making any electrical connections provincial, or local codes, or regulations. to avoid possible electric shock hazard. - Page 44 Installation & Service Manual Field wiring Figure 7-3 Low Voltage Field Wiring Connections...
- Page 45 Installation & Service Manual Field wiring (continued) Figure 7-4 Control Inputs/Outputs INPUTS LOW VOLTAGE CONNECTION TANK SENSOR BOARD LOW WATER CUTOFF INLET TEMPERATURE SENSOR OUTLET TEMPERATURE / HIGH LIMIT SENSOR FLUE GAS SENSOR BLOCKED AIR INLET PRESSURE SWITCH FLAME SENSOR BLOCKED DRAIN SWITCH CONTROL BOARD DISPLAY PANEL...
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Page 46: Condensate Disposal Condensate Drain
Installation & Service Manual Condensate disposal Condensate drain To allow for proper drainage on large 1. This water heater is a high efficiency appliance that NOTICE horizontal runs, a second line vent may produces condensate. be required and tubing size may need to 2. -
Page 47: Start-Up
Installation & Service Manual Start-up Chlorine concentration less than 200 ppm Propane water heaters only – Your propane WARNING supplier mixes an odorant with the propane 1. Do not fill the water heater or operate with water to make its presence detectable. In some containing chlorine in excess of 200 ppm. -
Page 48: Start The Water Heater
HTR:Standby appears in the display window. 5. Is incoming gas pressure less than 4 inches w.c.? 5. Locate the pinhole button above the “r” in the Lochinvar If none of the above corrects the problem, refer to the logo on the display board (FIG. 10-1). Insert a thin wire Troubleshooting section of this manual. - Page 49 Installation & Service Manual Start-up (continued) Figure 9-2 Operating Instructions - Models SNR150-100 -- SNA285-125...
- Page 50 Installation & Service Manual Start-up Figure 9-3 Operating Instructions - Models SNA400-125 -- SNA500-125...
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Page 51: Operating Information
Installation & Service Manual Operating information General The control monitors the temperature difference between the heat exchanger inlet and the heat exchanger outlet sensors. If How the water heater operates this difference exceeds 25°F the control will reduce the fan speed. -
Page 52: Water Heater Temperature Regulation
Installation & Service Manual Operating information Water heater temperature regulation Tank Differential Operating temperature (target) Once the tank set point is satisfied, the tank temperature must drop below the set point by this amount before the heater will The electronic control module senses water temperature in fire again. -
Page 53: Sequence Of Operation
Installation & Service Manual Operating information (continued) Sequence of operation OPERATION DISPLAY HTR: Standby 1. When the tank temperature falls below the set point minus the differential, the control will start the burner. TANK: 123.8F(129) 2. The control connects 120 VAC to the blower. The blower does not run at this time. -
Page 54: The Shield Control Module
Installation & Service Manual Operating information Shield control module Use the control panel (FIG. 10-1) to set temperatures, operating conditions, and monitor water heater operation. Figure 10-1 Control Panel • Press once to go into Menu Mode • Press again to exit Menu Mode •... -
Page 55: Status Display Screens
Installation & Service Manual Operating information (continued) Status display screens Status Display Screens By using the Previous/Next (, ) arrow keys on the electronic control module display panel, you can navigate through the five (5) display screens. Each screen will contain two (2) viewable items. The following is a description of the individual items and what they can display: Screen Display shows:... -
Page 56: Status Display Screens
Installation & Service Manual Operating information Status Display Screens (cont’d) By using the Previous/Next (, ) arrow keys on the electronic control module display panel, you can navigate through the five (5) display screens. Each screen will contain two (2) viewable items. The following is a description of the individual items and what they can display: Screen Display shows:... -
Page 57: Maintenance Maintenance And Annual Startup
Installation & Service Manual Maintenance Maintenance and annual startup Table 11A Service and Maintenance Schedules Service technician Owner maintenance (see the following pages for instructions) General: • Address reported problems • Inspect interior; clean and vacuum if necessary; • Clean condensate trap and fill with fresh Daily •... -
Page 58: Address Report Problems
Installation & Service Manual Maintenance Follow the service and maintenance procedures given throughout this manual and in component literature WARNING shipped with the water heater. Failure to perform the service and maintenance could result in damage to the water heater or system. Failure to follow the directions in this manual and component literature could result in severe personal injury, death, or substantial property damage. -
Page 59: Check Expansion Tank
Installation & Service Manual Maintenance (continued) Check expansion tank 2. After following the warning directions, if the relief valve weeps or will not seat properly, replace the relief valve. 1. Expansion tanks provide space for water to move in and Ensure that the reason for relief valve weeping is the valve out as the water expands due to temperature increase or and not over-pressurization of the system due to expansion... -
Page 60: Check Burner Flames
Installation & Service Manual Maintenance Check burner flame Handling ceramic fiber materials REMOVAL OF COMBUSTION CHAMBER 1. Inspect flame through observation window. LINING 2. If the flame is unsatisfactory at either high fire or low The combustion chamber insulation in fire, turn off water heater and allow water heater to WARNING this appliance contains ceramic fiber... -
Page 61: Oiled Bearing Circulators
Table 11B Heat Exchanger Cleaning Kits Figure 11-4 Anode Location Part Component Model Number Number Description CTN20005 Rear Refractory Cover ANODE RODS SNR150-100 MSC20083* Nylon 4" Wheel Brush* SNR200-100 KIT30063 SNA285-125 MSC20084 3mm Allen Wrench SNA400-125 MSC20086 1/4" x 24" Drill Extension... -
Page 62: Troubleshooting
Installation & Service Manual Troubleshooting Check control module fuses Label all wires prior to disconnection WARNING when servicing controls. Wiring errors ALWAYS check control module fuses can cause improper and dangerous NOTICE before replacing control module or any operation. Always disconnect power major components (blower, etc.). -
Page 63: Troubleshooting Chart - No Display
Installation & Service Manual Troubleshooting (continued) Table 12A Troubleshooting Chart - No Display FAULT CAUSE CORRECTIVE ACTION - No 120 VAC supplied to unit. • Check external line switch, fuse, or breaker. • Check wiring harness connection between display board and main control board. Connect harness at both points. -
Page 64: Checking Temperature Sensors
Installation & Service Manual Troubleshooting Checking temperature sensors The water heater temperature sensors (inlet water, outlet water, tank water, and flue) are all resistance type devices. The following tables show the correct values for the sensors at various temperatures. Use an ohmmeter to read the resistance of the sensor at a known temperature. -
Page 65: Troubleshooting Chart - Noisy System
Installation & Service Manual Troubleshooting (continued) Table 12D Troubleshooting Chart - Noisy System FAULT CAUSE CORRECTIVE ACTION - Supply gas problem. Natural gas pressures should be between 4 inches w.c. and • Refer to Section 6 - Gas Connections for detailed 14 inches w.c. -
Page 66: Troubleshooting Chart - Fault Messages Displayed
Press the RESET button • Replace main control board. on the display to reset.) • Ensure gas valve switch is ON (Models SNR150-100 and SNA285-125). • Check wiring harness connection at the gas valve and at the main control board. - Page 67 Table 12E (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Water Heater Interface FAULT DESCRIPTION CORRECTIVE ACTION • Ensure gas valve switch is ON (Models SNR150-100 and SNA285-125). • Check wiring harness connection at the gas valve and at the main control board. • Inspect spark electrode and associated wiring for damage and connection.
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Page 68: Corrective Action
Installation & Service Manual Troubleshooting Table 12E (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Water Heater Interface FAULT DESCRIPTION CORRECTIVE ACTION • Verify that the system is full of water and that all air has been properly purged from the system. •... - Page 69 Installation & Service Manual Troubleshooting (continued) Table 12E (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Water Heater Interface FAULT DESCRIPTION CORRECTIVE ACTION • Vent/air intake lengths exceed the maximum allowed Fan High lengths. Refer to Section 2 - General Venting for proper lengths.
- Page 70 Installation & Service Manual Troubleshooting Table 12E (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Water Heater Interface FAULT DESCRIPTION CORRECTIVE ACTION Automatic Reset O-TEMP HEX SWITCH High Limit / HEX (Applies to the 285-125 --500-125 Models Only): Temp Sw •...
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Page 71: Displayed
Installation & Service Manual Troubleshooting (continued) Table 12E (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Water Heater Interface FAULT DESCRIPTION CORRECTIVE ACTION Parameters After downloading parameters from a laptop, • Press the ENTER/RESET button on the display Progr the main control board must be reset. -
Page 72: Combustion Analysis Procedure
Replace the flue sensor and grommet into the vent connection. 5. Locate the pinhole button above the “r” in the Lochinvar logo on the display board (FIG. 10-1). Insert a thin wire 10. Replace the top panel on the unit. -
Page 73: Gas Valve Adjustment Procedure
Figure 12-3 Gas Valve Adjustment: Model SNA400-125 following procedures: (Note: The procedures below are model specific.) Models SNR150-100 -- SNA285-125 Locate the throttle adjustment screw on the side of the venturi valve (FIG. 12-2). Using a screwdriver, turn the screw... -
Page 74: Diagrams
Installation & Service Manual Diagrams Figure 13-1 Ladder Diagram 120VAC JUNCTION BOX NEUTRAL GROUND TERMINAL STRIP TERMINAL STRIP 120V SUPPLY "L" 120V SUPPLY "N" PUMP RELAY PUMP "L" PUMP "N" PUMP TERMINAL TERMINAL STRIP STRIP INTEGRATED CONTROL PUMP RELAY COIL X1-6 X1-3 DHW PUMP... -
Page 75: Wiring Diagram
Installation & Service Manual Diagrams (continued) Figure 13-2 Wiring Diagram LOW VOLTAGE WARNING DISPLAY BOX DEPICTS 120 VAC OPTIONAL ITEMS DISCONNECT POWER HIGH VOLTAGE BEFORE SERVICING INTEGRATED CONTROL JUNCTION INTERFACE CONNECTION BOARD PUMP X1-5 PUMP RELAY CN2-9 X6-10 EXTERNAL LIMITS CN2-3 X6-5 X1-3... - Page 76 Revision Notes: Revision A (ECO #C02299) initial release. Revision B (ECO #C02870) reflects the addition of a mixing valve to the piping diagrams (FIG.’s 6-2 and 6-3, pgs. 32 - 34). Revision C (ECO #C02738) reflects edits made to the Gas Valve Adjustment Procedure for Model SNA400-125 on page 69.