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Smith XWH 150 Instruction Manual

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500 Tennessee Waltz Parkway
Ashland City, TN 37015
www.hotwater.com
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 neighbor's phone. Follow the
gas supplier's instructions.
•
If you cannot reach your gas supplier,
call the fire department.
Installation
performed by a
service agency or the gas supplier.
Thank you for buying this energy efficient water heater.
We appreciate your confidence in our products.
PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.
PRINTED 0916
COMMERCIAL GAS WATER HEATERS
LOW LEAD CONTENT
and
service
must
qualified
installer,
be

Instruction Manual

MODELS XWH 150 - 800
INSTALLATION - OPERATION - SERVICE
- MAINTENANCE - LIMITED WARRANTY
Read and understand this instruction
manual and the safety messages
herein before installing, operating or
servicing this water heater.
Failure to follow these instructions and
safety messages could result in death
or serious injury.
This manual must remain with the
water heater.
100274939_2000534996_Rev A

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Summary of Contents for Smith XWH 150

  • Page 1: Instruction Manual

    Instruction Manual COMMERCIAL GAS WATER HEATERS MODELS XWH 150 - 800 INSTALLATION - OPERATION - SERVICE - MAINTENANCE - LIMITED WARRANTY 500 Tennessee Waltz Parkway Ashland City, TN 37015 www.hotwater.com LOW LEAD CONTENT WARNING: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS SAFE INSTALLATION, USE AND SERVICE.......... 3 Propane (LP) Gas ................43 APPROVALS ..................3 Field Wiring ..................46 GENERAL SAFETY INFORMATION ............4 Condensate Disposal ..............49 Precautions ..................4 START UP .................... 50 Grounding Instructions ..............4 Operating Instructions For Models 150 - 285 ........

  • Page 3: Safe Installation, Use And Service

    SAFE INSTALLATION, USE AND SERVICE The proper installation, use and servicing of this water heater is extremely important to your safety and the safety of others. Many safety-related messages and instructions have been provided in this manual and on your own water heater to warn you and others of a potential injury hazard.

  • Page 4: General Safety Information

    GENERAL SAFETY INFORMATION PRECAUTIONS HYDROGEN GAS FLAMMABLE DO NOT USE THIS WATER HEATER IF ANY PART HAS BEEN EXPOSED TO FLOODING OR WATER DAMAGE. Immediately call a qualified service agency to inspect the water heater and to make a determination on what steps Explosion Hazard should be taken next.
  • Page 5 GENERAL SAFETY INFORMATION Fire or Explosion Hazard Fire Hazard Do not store or use gasoline or other flammable vapors and For continued protection against liquids in the vicinity of this or any other appliance. risk of fire: Do not install water heater on Avoid all ignition sources if you smell gas.

  • Page 6: Introduction

    INTRODUCTION Thank You for purchasing this water heater. Properly installed Service and diagnostic procedures should only be performed and maintained, it should give you years of trouble free service. by a Qualified Service Agency. NOTE: Costs to correct installation errors are not covered ABBREVIATIONS USED under the limited warranty.

  • Page 7: Features And Components

    FEATURES AND COMPONENTS MODELS 150 - 200 Rear View - Models 150 - 200 Left Side (Inside Out): Models 150 - 200 MODEL 285 Rear View - Models 285 Left Side (Inside Out): Models 285...
  • Page 8 MODELS 400 - 500 Rear View - Models 400 - 500 Left Side (Inside Out): Models 400 - 500 MODELS 600 - 800 7, 28 Rear View - Models 600 - 800 Left Side (Inside Out): Models 600 - 800...
  • Page 9 COMPONENTS 21. Low Voltage Connection Board: The connection board is used to connect external low voltage devices. 1. Stainless Steel Heat Exchanger. Allows water to flow through specially designed coils for maximum heat transfer, 22. Low Voltage Wiring Connections (Knockouts): Conduit while providing protection against flue gas corrosion.

  • Page 10: Installation Considerations

    NATURAL GAS PROPANE GAS NATURAL GAS PROPANE GAS XWH 150 -0.22” W.C. (-0.054 kPa) -0.23” W.C. (-0.057 kPa) 4” W. C. (1 kPa) 8” W. C. (2 kPa) 14” W. C. (3.49 kPa) 14” W. C. (3.49 kPa) XWH 200 -0.39” W.C. (-0.09 kPa) -0.39”...

  • Page 11: Ratings

    TABLE 6 MODEL NUMBER CSA INPUT MODULATION WATER CONTENT WATER CONNECTIONS GAS CONNECTIONS VENT/AIR SIZE BTU/HR GALLONS (NOTE 1, 5) (NOTE 2, 3) XWH 150 30,000 - 150,000 1-1/4" NPT 1/2" 3"/3" XWH 200 40,000 - 199,999 1-1/4" NPT 1/2"...

  • Page 12: Closet And Alcove Installations

    A closet is any room the water heater is installed in which is less Clearances from combustible materials than 86 cubic feet for XWH 150 models, 106 cubic feet for XWH 200 models, 120 cubic feet for XWH 285 models, 165 cubic feet 1.
  • Page 13 PROVIDE AIR OPENINGS TO ROOM: VENT AND AIR PIPING XP water heater alone in equipment room The XP water heater requires a special vent system, designed for pressurized venting. 1. No air ventilation openings into the equipment room are needed when clearances around the XP water heater are at The water heater is to be used for either direct vent installation least equal to the SERVICE clearances shown in Figure’s or for installation using indoor combustion air.

  • Page 14: Corrosive Materials And Contamination Sources

    CORROSIVE MATERIALS AND CONTAMINATION • Seal - With prior requirements met, the system should be SOURCES tested to the procedure listed in parts (3) through (6) of the Removal of an Existing Water Heater section mentioned Products to avoid: below. •...

  • Page 15: Removing A Water Heater From Wood Pallet

    REMOVING A WATER HEATER FROM WOOD Reposition the gas valve against the venturi and replace the PALLET screws (See Figure 5) securing the valve to the venturi. After installation is complete, attach the propane conversion label (in the conversion kit bag) next to the water heater After removing the outer shipping carton from the water rating plate.

  • Page 16: Leveling The Water Heater

    After installation is complete, attach the propane After adjustment is complete, attach the propane conversion label (in the conversion kit bag) next to conversion label (in the conversion kit bag) next to the water heater rating plate. Attach the Propane (LP) the water heater rating plate.

  • Page 17: Venting Installation

    VENTING INSTALLATION DIRECT VENTING OPTIONS - SIDEWALL VENT Figure 10. Two-Pipe Sidewall Termination - See page 24 for Figure 11. PVC/CPVC Concentric Sidewall Termination more details (Models 150 - 600 Only) - See Page 28 for more details Figure 12. Two-Pipe Vertical Termination Figure 13.

  • Page 18: Install Vent And Combustion Air Piping

    You may use any of the vent/air piping methods covered in this manual. Do not attempt to install this water heater using any other means. Breathing Hazard - Carbon Monoxide Gas You must also install air piping from outside to the water heater •...

  • Page 19: Sizing

    SIZING NOTE: The use of double-wall vent or insulated material for the combustion air inlet pipe is recommended in cold climates to This water heater uses model specific combustion air intake and prevent the condensation of airborne moisture in the incoming vent piping sizes as detailed in Table below.

  • Page 20: Vent, Air Piping And Termination

    VENT, AIR PIPING AND TERMINATION If contaminants are found, you MUST: • Remove contaminants permanently. —OR— This water heater vent and air piping can be installed through the • Relocate air inlet and vent terminations to other areas. roof or through a sidewall. Follow the procedures in this manual for the method chosen.

  • Page 21: Polypropylene

    POLYPROPYLENE 7. Priming and Cementing: • Handle fittings and pipes carefully to prevent This product has been approved for use with the Polypropylene contamination of surfaces. vent with the manufacturers listed in Table 12. • Apply a liberal even coat of primer to the fitting socket All terminations must comply with listed options in this manual and to the pipe end to approximately 1/2"...
  • Page 22 The installer must use a specific vent starter adapter at the Use only the adapters and vent system listed in Tables 12 and 13. flue collar connection. This adapter is supplied by the vent DO NOT mix vent systems of different types or manufacturers. manufacturer to adapt to its vent system.

  • Page 23: Stainless Steel Vent

    STAINLESS STEEL VENT This product has been approved for use with stainless steel using the manufacturers listed in Table 14. Use only the materials, vent systems, and terminations listed in Tables 14 and 16. DO NOT mix vent systems of different types or manufacturers.

  • Page 24: Vent/ Air Termination - Sidewall

    VENT/ AIR TERMINATION - SIDEWALL Table 17. Sidewall Vent Kits Follow instructions below when determining vent location to MODEL KIT NUMBER VENT SIZE avoid possibility of severe personal injury, death, or substantial 150 - 200 100274669 3 inch vent property damage. 285 - 600 100274670 4 inch vent...

  • Page 25: Vent/ Air Termination - Sidewall

    VENT/ AIR TERMINATION - SIDEWALL 5. Maintain clearances as shown in Figure’s 22 thru 27, pages 24 and 25. Also maintain the following: Vent must terminate: • At least 6 feet from adjacent walls. • No closer than 12 inches below roof overhang. •...

  • Page 26: Sidewall Direct Venting

    SIDEWALL DIRECT VENTING 2. For Polypropylene Only: Install the vent and air intake sidewall adapters from Table 13 on Page 22 into the vent plate. Slide the sidewall retaining bracket down the sidewall adapters flush to the vent plate (Figure 29). 3.

  • Page 27: Multiple Vent/ Air Terminations

    MULTIPLE VENT/ AIR TERMINATIONS 1. When terminating multiple XP water heaters terminate each vent/air connection as described in this manual (Figure 33). All vent pipes and air inlets must terminate at the same height to avoid possibility of severe personal injury, death, or substantial property damage.

  • Page 28: Sidewall Termination - Optional Concentric Vent: Models 150 - 600

    VENT: MODELS 150 - 600 DESCRIPTION AND USAGE A. O. Smith offers optional concentric combustion air and vent pipe termination kits (Factory Kit #100274637 for 3” diameter - Models 150 - 200 and #100274638 for 4” diameter - Models 285 - 600).
  • Page 29 Figure 40. Rain Cap to Vent Pipe Alternate Assembly 5. Install the Y concentric fitting and pipe assembly through the structure’s hole. NOTE: Do not allow insulation or other materials to accumulate Figure 38. Concentric Vent Dimensional Drawing - inside the pipe assembly when installing through the hole. Models 150 - 200 6.

  • Page 30: Multiventing Sidewall Terminations

    Figure 41. Concentric Vent Sidewall Attachment DO NOT use field-supplied couplings to extend pipes. Airflow MULTIVENTING SIDEWALL TERMINATIONS restriction will occur and may cause intermittent operation. When two (2) or more direct vent appliances are vented near 8. Cement appliance combustion air and vent pipes to the each other, each appliance must be individually vented (see concentric vent termination assembly.

  • Page 31: Vertical Direct Venting

    VERTICAL DIRECT VENTING VENT/ AIR TERMINATION - VERTICAL Follow instructions below when determining vent location to avoid possibility of 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 on Table 9 of this manual.
  • Page 32 PREPARE ROOF PENETRATIONS 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:...

  • Page 33: Vertical Termination - Optional Concentric Vent: Models 150 - 600

    DESCRIPTION AND USAGE 3. Partially assemble the concentric vent termination kit. Clean A. O. Smith offers an optional concentric combustion air and vent and cement following the cleaning procedures in these pipe termination kit. Both combustion air and vent pipes must instructions.
  • Page 34 Do not operate the appliance with the rain cap removed or 6. Install the rain cap and the small diameter pipe assembly into recirculation of combustion products may occur. Water may the roof penetration assembly. Ensure the small diameter also collect inside the larger combustion air pipe and flow to the pipe is cemented and bottomed in the Y concentric fitting for burner enclosure.

  • Page 35: Alternate Vertical Concentric Venting

    ALTERNATE VERTICAL CONCENTRIC VENTING This appliance may be installed with a concentric vent arrangement where the vent pipe is routed through an existing unused venting system; or by using the existing unused venting system as a chase for vent and combustion air routing. CONCENTRIC VENTING ARRANGEMENT The venting is to be vertical through the roof.

  • Page 36: Water Heater Installation

    (consult the manufacturer’s instructions for a detailed explanation). For Example: If using a 1 1/4 inch pipe size (Models XWH 150 - XWH 200) select paddle #1. Install the assembled flow switch into the 1 inch fitting of the Figure 55.

  • Page 37: Piping Components

    A. O. Smith supplies a tank sensor. The tank sensor must be your applications. installed in the tapping provided in the lower 25% of the storage tank to achieve proper operation.
  • Page 38 The piping will not support the weight of the water heater circulator pump. Do not attempt to support the weight of the water heater circulator pump with the piping or its accessories. Refer to the pump manufacturer’s installation instructions. Failure to comply could result in severe personal injury, death, or substantial property damage.
  • Page 39 The piping will not support the weight of the water heater circulator pump. Do not attempt to support the weight of the water heater circulator pump with the piping or its accessories. Refer to the pump manufacturer’s installation instructions. Failure to comply could result in severe personal injury, death, or substantial property damage.
  • Page 40 The piping will not support the weight of the water heater circulator pump. Do not attempt to support the weight of the water heater circulator pump with the piping or its accessories. Refer to the pump manufacturer’s installation instructions. Failure to comply could result in severe personal injury, death, or substantial property damage.
  • Page 41 The piping will not support the weight of the water heater circulator pump. Do not attempt to support the weight of the water heater circulator pump with the piping or its accessories. Refer to the pump manufacturer’s installation instructions. Failure to comply could result in severe personal injury, death, or substantial property damage.

  • Page 42: Gas Connections

    GAS CONNECTIONS CONNECTING GAS SUPPLY PIPING 1. Remove the top access panel and refer to Figure’s 61 thru 64 to pipe gas to the water heater. a. Install ground joint union for servicing, when required. b. On Models 150 - 400 install a manual shutoff valve in the gas supply piping outside water heater jacket when required by local codes or utility requirements.

  • Page 43: Natural Gas

    Do not check for gas leaks with an open flame – use the bubble 2. Install 100% lockup gas pressure regulator in supply line if test. Failure to use the bubble test or check for gas leaks can inlet pressure can exceed 14 inches w.c. at any time. Adjust cause severe personal injury, death, or substantial property lockup regulator for 14 inches w.c.
  • Page 44 Table 23. Natural Gas Pipe Size Chart CAPACITY OF SCHEDULE 40 METALLIC PIPE IN CUBIC FEET OF NATURAL GAS PER HOUR (BASED ON .60 SPECIFIC GRAVITY, 0.30" W.C. PRESSURE DROP) Length of Pipe in Straight Feet Pipe Size (Inches) 1 1/4 1,060 1 1/2 1,580...
  • Page 45 Figure 66. Inlet Gas Supply Check - Models 150 - 285 Figure 69. Inlet Gas Supply Check - Models 600 - 800 GAS PRESSURE The gas pressure must remain between 4 inches w.c. (Natural), 8 inches w.c. (Propane (LP)) minimum and 14 inches w.c. (Natural and Propane (LP)) maximum during stand-by (static) mode and while in operating (dynamic) mode.

  • Page 46: Field Wiring

    FIELD WIRING ELECTRICAL SHOCK HAZARD – For your safety, turn off electrical power supply before making any electrical connections to avoid possible electric shock hazard. Failure to do so can cause severe personal injury or death. Wiring must be N.E.C. Class 1. If original wiring as supplied with the water heater must be replaced, use only type 105°C wire or equivalent.
  • Page 47 DAMPER RELAY WATER HEATER BUILDING MANAGEMENT SYSTEM (BMS) If dampers need to operate when the water heater fires, they can An external control may be connected to control either the be controlled by this output. Connect these terminals to a 24 VAC firing rate or the set point of the water heater.
  • Page 48 Figure 72. Low Voltage Field Wiring Connections...

  • Page 49: Condensate Disposal

    CONDENSATE DISPOSAL NOTE: Use materials approved by the authority having jurisdiction. In the absence of other authority, PVC and CPVC CONDENSATE DRAIN pipe must comply with ASTM D1785 or D2845. Cement and primer must comply with ASME D2564 or F493. 1.

  • Page 50: Start Up

    START UP CHLORINE CONCENTRATION LESS THAN 200 PPM The condensate trap (Figure 74) must be filled with water during all times of water heater operation to avoid flue gas emission 1. Do not fill the water heater or operate with water containing from the condensate drain line.
  • Page 51 Propane water heaters – verify conversion SET WATER HEATER OPERATION Verify propane conversion has been completed per the Set Operating Setpoint temperature Propane Conversion instructions. From the Home screen on the Touch Screen Display press DO NOT adjust gas valve outlet pressure. The gas valve is the MENU button.

  • Page 52: For Your Safety Read Before Operating

    OPERATING INSTRUCTIONS FOR MODELS 150 - 285 FOR YOUR SAFETY READ BEFORE OPERATING WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury, or loss of life. A. This appliance does not have a pilot. It is •...

  • Page 53: Operating Instructions For Models 400 - 800

    OPERATING INSTRUCTIONS FOR MODELS 400 - 800...

  • Page 54: Control System Operation

    CONTROL SYSTEM OPERATION GENERAL The unit will restart automatically once the temperature difference has dropped below 25°F (Models 150 - 500) or 30°F (Models 600 HOW THE WATER HEATER OPERATES - 800) and the minimum off time has expired. The XP water heater uses an advanced stainless steel heat Freeze protection exchanger and electronic control module that allows fully DO NOT install the water heater in a room likely to freeze.
  • Page 55 High limit operations Once the Leader water heater receives a call for heat from a tank sensor, BMS or Modbus, the control will determine what the set The XP water heater is equipped with a fixed manual reset hight point will be. A fixed temperature set point can be programmed limit and an adjustable manual reset high limit.

  • Page 56: Sequence Of Operation

    SEQUENCE OF OPERATION OPERATION TOUCH SCREEN DISPLAY 1. The control will turn on the water heater pump (always A. O. Smith XP Tank Temperature 92°F ON except in Setpoint Adjustment). The flow switch and/or Operating Setpoint 93°F LWCO must close.

  • Page 57: User Interface Module (Uim)/ Touch Screen Display

    USER INTERFACE MODULE (UIM)/ TOUCH SCREEN DISPLAY A. O. Smith XP Tank Temperature 71°F LCD Touch Status Icons Operating Setpoint 184°F Screen Display Status: Ignition MENU DISABLE HELP Main Menu Enable / Disable Button Help Menu Figure 75. User Interface Module (UIM)/ Touch Screen Display...

  • Page 58: Status Icons

    STATUS ICONS The Status Icons are displayed on the Desktop screen and convey operational and diagnostic information. The icons are described in the table below. Ensure the water heater is properly grounded. Flame sensing requires an adequate earth ground. If the water heater is not properly grounded it will cause ignition failure.

  • Page 59: Operating States

    OPERATING STATES The current operational state of the water heater is displayed on the User Interface Module (UIM) screen as the "Status." The common operational states are described in the table below. Ensure the water heater is properly grounded. Flame sensing requires an adequate earth ground.

  • Page 60: Maintenance

    MAINTENANCE MAINTENANCE SCHEDULES Table 29. Service and Maintenance Schedules SERVICE TECHNICIAN OWNER MAINTENANCE (SEE THE FOLLOWING PAGES FOR INSTRUCTIONS) General: DAILY • Check water heater area • Address reported problems • Inspect interior; clean and vacuum if necessary; • Clean condensate trap and fill with fresh water •...

  • Page 61: Maintenance

    MAINTENANCE Follow the service and maintenance procedures given throughout this manual and in component literature 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 62 CHECK WATER HEATER T & P RELIEF VALVE PERFORM START-UP AND CHECKS Inspect the T & P Relief Valve and lift the lever to verify flow. Start water heater and perform checks and tests specified in Before operating any T & P Relief Valve, ensure that it is Start Up section of this manual.
  • Page 63 CLEANING HEAT EXCHANGER Table 30. Heat Exchanger Cleaning Kits For recommended materials; including brush, appropriate MODEL PART COMPONENT extension(s), refractory cover, and detailed instructions see NUMBER NUMBER DESCRIPTION Table 30 - Heat Exchanger Cleaning Kits. 100140243 Rear Refractory 1. Shut down water heater: Cover •...

  • Page 64: Wiring Diagrams

    WIRING DIAGRAMS JUNCTION BOX 120VAC NEUTRAL GROUND TERMINAL STRIP TERMINAL STRIP 120V SUPPLY "L" 120V SUPPLY "N" XWH MODELS ONLY INTEGRATED CONTROL ON / OFF SWITCH X1-1 BLOWER 3.15A X1-6 BUILDING X1-2 BUILDING RECIRC PUMP RECIRC CONTACTS BUILDING BUILDING PUMP RECIRC PUMP RECIRC PUMP RELAY...
  • Page 65 LOW VOLTAGE BOX DEPICTS 120 VAC OPTIONAL ITEMS HIGH VOLTAGE USER INTERFACE BOX DEPICTS MODULE (UIM) DUAL SENSOR SINGLE HOUSING RIBBON CABLE INTEGRATED CONNECTION BOARD CONTROL JUNCTION ALARM X1-3 OR/BK CONTACTS RUN-TIME PUMP CONTACTS X1-4 24 VAC LOUVER RELAY COIL LOUVER X1-2 PR/W...

  • Page 66: Notes

    NOTES...

  • Page 67: Limited Warranty

    For your records, fill in the product: Serial: ___________________ Model: ___________________ A. O. Smith Corporation 500 Tennessee Waltz Parkway Ashland City, Tennessee 37015 800-527-1953 www.hotwater.com...
  • Page 68 500 Tennessee Waltz Parkway, Ashland City, TN 37015 Technical Support: 800-527-1953 • Parts: 800-433-2545 www.hotwater.com Copyright © 2016 A. O. Smith, All rights reserved.

This manual is also suitable for:

Xwh 2150Xwh 800

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