Table of Contents
Advertisement
Quick Links
Thank you for buying this energy efficient water heater.
We appreciate your confidence in our products.
ALL TECHNICAL AND WARRANTY QUESTIONS: SHOULD BE DIRECTED TO THE LOCAL DEALER FROM WHOM THE WATER HEATER WAS
PURCHASED. IF YOU ARE UNSUCCESSFUL, CALL THE TECHNICAL SUPPORT PHONE NUMBER SHOWN ON THE WATER HEATER LABELING.
PRINTED 0518
COMMERCIAL GAS WATER HEATERS
LOW LEAD
CONTENT
KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE
WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.
Instruction Manual
POWER VENT/POWER DIRECT VENT GAS MODELS
•
For Your Safety
AN ODORANT IS ADDED TO THE GAS USED
BY THIS WATER HEATER.
1
WITH DIRECT SPARK IGNITION
300/301 SERIES MODELS
•
100300622_ 2000554312_Rev B
Advertisement
Table of Contents
Related Manuals for American Water Heater 300 Series
Summary of Contents for American Water Heater 300 Series
- Page 1 Instruction Manual COMMERCIAL GAS WATER HEATERS POWER VENT/POWER DIRECT VENT GAS MODELS WITH DIRECT SPARK IGNITION 300/301 SERIES MODELS LOW LEAD CONTENT • • For Your Safety Thank you for buying this energy efficient water heater. AN ODORANT IS ADDED TO THE GAS USED We appreciate your confidence in our products.
-
Page 2: Table Of Contents
TABLE OF CONTENTS Vent Pipe Termination.............27 SAFE INSTALLATION, USE AND SERVICE.........3 APPROVALS .................3 Planning The Vent System .............27 GENERAL SAFETY INFORMATION ..........4 Installation Of Horizontal Through The Wall Vent System ..27 Precautions ................4 Direct Vent Terminal Installation ..........28 Grounding Instructions .............4 Direct Vent Air Intake Moisture Protection ......28 Hydrogen Gas Flammable ............4 Installation Sequence .............28... -
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 APPLIANCE IF ANY PART HAS BEEN EXPOSED TO FLOODING OR WATER DAMAGE. Immediately call a qualified service technician to inspect the water heater and to make a determination on what steps Explosion Hazard should be taken next. - Page 5 GENERAL SAFETY INFORMATION...
- Page 6 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 7: Introduction
INTRODUCTION Thank You for purchasing this water heater. Properly installed and Detailed installation diagrams are also found in this manual. maintained, it should give you years of trouble free service. These diagrams will serve to provide the installer with a reference. -
Page 8: Dimensions And Capacity Data
DIMENSIONS AND CAPACITY DATA ROUGH IN DIMENSIONS: 50 GALLON UNIT Figure 1: DIMENSIONS FOR 50 GALLON UNIT ROUGH IN DIMENSIONS: 75 GALLON UNIT FRONT VIEW BACK VIEW Figure 1A: DIMENSIONS FOR 75 GALLON UNIT Table 1 – ROUGH-IN-DIMENSIONS Units Inches 66-3/4 49-1/4 15-3/4... - Page 9 DIMENSIONS AND CAPACITY DATA Table 2 – CAPACITY, GAS AND ELECTRICAL CHARACTERISTICS Approximate Capacity *Manifold Pressure Electrical Characteristics U.S. Gals. Liters Gas Type “WC Volts/Hz Amperes Nat./LP 120/60 <5 Nat/LP 120/60 <5 * The manifold pressure is the factory setting and is not adjustable. A negative pressure will be seen with just the blower running without the Gas Control Valve open.
-
Page 10: Features And Components
FEATURES AND COMPONENTS 50 GALLON UNIT **13 **14 ACCESS PANEL Caution: This access panel covers a 2” NPT plug that was required during the manufacturing of this water heater. This 2” NPT flange is not a cleanout fitting, removing the 2”... - Page 11 FEATURES AND COMPONENTS (CONT.) 75 GALLON UNIT **13 **14 ACCESS PANEL Caution: This access panel covers a 2” NPT plug that was required during the manufacturing of this water heater. This 2” NPT flange is not a cleanout fitting, removing the 2”...
- Page 12 FEATURES AND COMPONENTS (CONT.) Central Control Board (CCB) Enclosure Blocked Intake Switch Blocked Outlet Switch Blower Assembly Burner Assembly Flame Sensor Igniter Assembly Junction Box Gas Control Valve Assembly 10: UIM (user interface module) 11: Top Plastic Enclosure 12: Display Enclosure ** 13: Exhaust Elbow Assembly ** 14: Condensate Drain Outlet 15: Enable / Disable Switch...
-
Page 13: Controls And Switches
CONTROLS AND SWITCHES BLOCKED INTAKE SWITCH The Blocked Intake Switch is set up to shut the unit off when a This model is provided with two pressure switches. These switches build-up of negative pressure in the intake air pipe occurs. This are essential to the safe and proper operation of the unit. -
Page 14: Installation Considerations
INSTALLATION CONSIDERATIONS LOCATING THE WATER HEATER solvents, propane (LP or butane, etc.) and other substances (such as adhesives, etc.) emit flammable vapors which can be Carefully choose a location for the new water heater. The ignited by a gas water heater’s ignition device or main burner. placement is a very important consideration for the safety of the The resulting flashback and fire can cause death or serious occupants in the building and for the most economical use of the... -
Page 15: Insulation Blankets
mentioned below, see Figure 1B & Figure 1C). Failure to follow these instructions can restrict the air flow required for proper combustion, potentially resulting in fire, asphyxiation, serious personal injury or death. • Do not apply insulation to the top of the water heater, as this will interfere with safe operation of the blower assembly. -
Page 16: Unconfined Space
UNCONFINED SPACE FRESH AIR OPENINGS FOR CONFINED SPACES An Unconfined Space is one whose volume IS NOT LESS THAN The following instructions shall be used to calculate the size, number 50 cubic feet per 1,000 Btu/hr (4.8 cubic meters per kW) of the and placement of openings providing fresh air for combustion, total input rating of all appliances installed in the space. -
Page 17: Outdoor Air Through Two Horizontal Ducts
AIR FROM OTHER INDOOR SPACES Alternatively a single permanent opening, commencing within 12 inches (300 mm) of the top of the enclosure, shall be provided. See Figure 6. The water heater shall have clearances of at least 1 inch (25 mm) from the sides and back and 6 inches (150 mm) from the front of the appliance. -
Page 18: Installation Requirements
INSTALLATION REQUIREMENTS CHEMICAL VAPOR CORROSION see Figure 9. Valves for reducing point of use temperature by mixing cold and hot water are also available: Corrosion of the flueways and vent system may occur if air for Consult a Qualified Installer or Service Agency. Follow combustion contains certain chemical vapors. -
Page 19: Mixing Valves
DEDICATED POWER WIRING AND BREAKERS physically/mentally disabled. Table 4 shows the approximate time-to- burn relationship for normal adult skin. If anyone using hot water provided Dedicated power supply wires, ground wiring and dedicated by the water heater being installed fits into one of these groups or if there circuit breakers often prevent electrical line noise and should is a local code or state law requiring a certain water temperature at the be considered when installing the water heater. -
Page 20: Gas Supply Systems
GAS SUPPLY SYSTEMS 5. When installing multiple water heaters in the same gas supply system it is recommended that individual positive lock-up gas Low pressure building gas supply systems are defined as those pressure regulators be installed at each unit. systems that cannot under any circumstances exceed 14”... -
Page 21: Space Heating And Potable Water System
THERMAL EXPANSION SPACE HEATING AND POTABLE WATER SYSTEM As water is heated, it expands (thermal expansion). In a closed Your water heater is equipped with inlet/outlet connections for use system the volume of water will grow when it is heated. As the in space heating applications (see Figure 10). -
Page 22: Temperature-Pressure Relief Valve
TEMPERATURE-PRESSURE RELIEF VALVE T&P VALVE DISCHARGE PIPE REQUIREMENTS: • Shall not be smaller in size than the outlet pipe size of the valve, This water heater is provided with a properly rated/sized and certified or have any reducing couplings or other restrictions. combination Temperature-Pressure Relief Valve (T&P relief valve) by •... -
Page 23: High Altitude Installations
This high efficiency water heater is certified for use without THIS SIDE VIEW EXHAUST (VENT) modification for an altitude of 10,100 feet (3,078 m). Consult the OF EXHAUST ELBOW ELBOW AND factory for installation at altitudes over 10,100 feet (3,078 m). ARROW INDICATE CONDENSATE THE LOCATION OF... -
Page 24: Installation Requirements For The Commonwealth Of Massachusetts
INSTALLATION REQUIREMENTS FOR THE COMMONWEALTH OF MASSACHUSETTS For all side wall terminated, horizontally vented power vent, direct vent, and power direct vent gas fueled water heaters installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements should be satisfied: INSTALLATION OF CARBON MONOXIDE DETECTORS At the time of installation of the side wall horizontal vented gas fueled... -
Page 25: Venting Installation
VENTING INSTALLATION APPROVED VENT/INTAKE MATERIAL Approved vent and intake air pipe materials that may be used in the United States: PVC pipe materials: • DWV ASTM-D2665 or CSA B181.2 • Schedule 40, 80, 120 ASTM-D1785 or CSA B137.3 • SDR Series ASTM-2241 or CSA B137.3 CPVC pipe materials: •... -
Page 26: Polypropylene Installations
POLYPROPYLENE INSTALLATIONS Installations must comply with applicable national, state, and local codes. For Canadian installation, Polypropylene vent must be The water heater has been approved to be installed with listed as a ULC-S636 approved system. If Polypropylene vent is not required by your local code, you may use either PVC or CPVC Polypropylene vent material as shown in Table 5 and Table 6. -
Page 27: Vent Pipe Termination
VENT PIPE TERMINATION INSTALLATION OF HORIZONTAL THROUGH THE WALL VENT SYSTEM The first step is to determine where the vent pipe will terminate. See Figure 13, Figure 14A, and Figure 15. The vent may terminate If you are installing your system so that it vents through roof, please through a sidewall as shown in Figure 13, Figure 14A and Figure 15 refer to section titled VERTICAL VENT TERMINAL INSTALLATION. -
Page 28: Direct Vent Terminal Installation
DIRECT VENT TERMINAL INSTALLATION INSTALLATION SEQUENCE 1. After the points of termination have been determined, The air intake provided on the unit contains an air intake screen to use the cover plates as templates to mark the holes for prevent large particles from entering the unit. the vent pipes to be inserted through the wall. -
Page 29: Termination Clearances Sidewall Power Vent
TERMINATION CLEARANCES SIDEWALL POWER VENT Figure 16 Vent terminal clearances for “Power Vent” installations. Power Vent configurations use room air for combustion. -
Page 30: Termination Clearances Sidewall Direct Vent
TERMINATION CLEARANCES SIDEWALL DIRECT VENT Figure 17 Vent terminal clearances for “Direct Vent” installations. Direct Vent configurations use outdoor air for combustion. -
Page 31: Vertical Vent Terminal Installation
VERTICAL VENT TERMINAL INSTALLATION WHEN TERMINATING THROUGH A ROOF, THE FOLLOWING SPECIFICATIONS PERTAINING TO TERMINAL LOCATION MUST BE FOLLOWED. 1. Proper support must be provided for all pipe protruding through the roof. 2. The vertical roof terminations should be sealed with a plumbing roof boot or equivalent flashing. -
Page 32: Direct Vent Diagram
DIRECT VENT DIAGRAM DIRECT VENT INSTALLATIONS Direct Vent combustion air intake drains are required in certain situations. See the section on Direct Vent Air Intake Moisture Protection on page 28 and the Figures 21 and 22 below. EXHAUST 18" 450 mm OR ABOVE ANTICIPATED SNOW LEVEL 18"... -
Page 33: Concentric Vent Installation
CONCENTRIC VENT INSTALLATION INSTALLATION VERTICAL ROOF TERMINATION This water heater is certified for concentric venting with concentric 1. Determine best location for termination kit. vent kit #100111100. Follow the instructions below for proper installations. N O T E : R o o f t e r m i n a t i o n i s p r e f e r r e d s i n c e i t i s l e s s susceptible to damage, has reduced chances to intake contaminants, Table 8 –... - Page 34 INSTALLATION SIDE WALL TERMINATION NOTE: Do not allow insulation or other materials to accumulate inside pipe assembly when installing through hole. 5. Secure assembly to roof structure as shown in Figure 28 using field supplied metal strapping or equivalent support material.
- Page 35 MULTI-CONCENTRIC VENT TERMINATIONS 6. Ensure the Y connection is oriented so the air intake side of Y is on top, see Figure 31. When two or more water heaters are direct vented with concentric vent terminations near each other, each water heater must be 7.
-
Page 36: Low Profile Termination Installation
LOW PROFILE TERMINATION INSTALLATION This water heater is certified for sidewall direct venting with IPEX System 636 Low Profile Vent Kit. Follow instructions below for proper installations. To Boiler Intake Air Connection All termination kits must be located and installed in accordance with local codes or the current editions of the National Fuel Gas Code From Boiler Vent (ANSI Z223.1/NFPA 54) or the Natural Gas and Propane Installation... -
Page 37: Water Heater Installation
WATER HEATER INSTALLATION CONDENSATE DRAIN INSTALLATION INSTALLATION INSTRUCTIONS 1. Ensure the water heater’s Enable/Disable switch is in the Installation must conform with these instructions and local building “Disable” position. codes. 2. Install a 1/2 inch PVC condensate drain line between condensate Field supplied materials required for installation include: drain connection on the Exhaust/Condensate Elbow and a suitable •... -
Page 38: Gas Piping
GAS PIPING Make sure gas supplied is same type listed on model rating plate. The inlet gas pressure must not exceed 14 inch water column (3.5 kPa) for natural and propane gas (L.P.). The minimum inlet gas pressure shown on rating plate is that which will permit firing at rated input. Schedule 40 Steel or Wrought Iron Pipe is the preferred material for the gas line of this water heater. - Page 39 NOTE: If electrical connection is made directly to terminal block, to locate the junction box. Use an available knock-out to route remove the white jumper wire before making the connection. the wires inside the junction box. Connect the ground wire from the power supply to the grounding Install field-supplied control wiring and conduit as required by lug inside the junction box.
-
Page 40: Temperature Regulation
TEMPERATURE REGULATION HIGH TEMPERATURE LIMIT CONTROL (ECO) Setting the Operating Set Point at 120°F (49°C) will reduce the risk of scalds. Some States require settings at specific lower temperatures. This water heater is equipped with an ECO (energy cut out) non adjustable high temperature limit switch. -
Page 41: Control System Operation
CONTROL SYSTEM OPERATION CONTROL SYSTEM NAVIGATION The water heaters covered in this manual are equipped with an electronic control system that regulates water temperature inside All operational information and user settings are displayed and the storage tank. Heating cycles and ignition are managed by the accessed from the UIM. - Page 42 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. Table 18. Status Icons Icon Description Water temperature in the tank has fallen. Shaded area of the animated thermometer icon will rise and fall in response to water temperature in the storage tank as sensed from the Temperature Probe.
- Page 43 OPERATING STATES The current operational state of the water heater is displayed on the Desktop screen as the "Status." The common operational states are described in the table below. Table 19. Operating States State Description Standby The water heater is not in an active heating cycle. IE: the Tank Temperature is at or above the Operating Set Point. Input Verification The control system is conducting a diagnostic check at the beginning of a heating cycle.
-
Page 44: User Settings & Control System Menus
USER SETTINGS & CONTROL SYSTEM MENUS the control system ends the heating cycle. A heating cycle is activated again when the sensed water temperature drops below TEMPERATURES MENU the Operating Set Point minus the Differential setting. Operating Set Point and Differential Adjustment NOTE: Lower Differential settings may cause excessive heating The Operating Set Point is adjustable from 90°F (42°C) to 181°F cycles (short-cycling) which can cause premature failure of heater... - Page 45 Temperatures Menu Description/Action Display • Differential - Adjustable user setting that changes the tank temperature Temperatures differential with a range of 2° to 20°F. The factory setting is 8°F. Operating Setpoint 120°F > • Tank Temperature - Non adjustable. Control system sensed temperature.
- Page 46 DISPLAY SETTINGS Description/Action Display Press Display Settings from the Main Menu to enter this menu. This Display Settings menu contains adjustable display options for viewing information on Temperature Units °F > the UIM’s LCD screen. Use the Slidebar to navigate the menu. Brightness 5 >...
- Page 47 CURRENT FAULT Description/Action Display Press Current Fault from the Main Menu to enter this menu. This menu Blocked Exhaust contains non adjustable operational information. Use the Slidebar to navigate the menu. 0 days 0 hr 0 min ago Error Code: A8-1201 This menu contains the current Fault or Alert error message.
- Page 48 SERVICE CONTACT INFORMATION The control system has a discrete menu that Installing contractors and/or service agents can access to enter contact information for their customers. This contact information will be displayed with all Fault and Alert messages. Table 21. Contact Information Description/Action Display From the Desktop Screen press and hold down the middle...
-
Page 49: For Your Information
FOR YOUR INFORMATION START UP CONDITIONS rod and the water. The most common complaint associated with the anode rod is one of a rotten egg smell in the hot water. The smell is a result of four factors which must all be present for the SMOKE/ODOR odor to develop: It is not uncommon to experience a small amount of smoke and odor... -
Page 50: Start Up
START UP PRIOR TO START UP FILLING THE WATER HEATER Installation and start up of this water heater requires abilities and skills equivalent to that of a licensed tradesman in the field involved, see Qualifications on page 7. DO NOT USE THIS APPLIANCE IF ANY PART HAS BEEN EXPOSED TO FLOODING OR WATER DAMAGE. -
Page 51: Lighting And Operation Labels
LIGHTING THE WATER HEATER LIGHTING THE WATER HEATER LIGHTING AND OPERATION LABELS The instruction label below is affixed to the water heaters that are covered by this manual at the factory and must be followed when lighting and operating the water heater. FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you do not follow these instructions exactly, a fire or... -
Page 52: Periodic Maintenance
PERIODIC MAINTENANCE VENTING SYSTEM INSPECTION A “No Water” or “Anode Shorted” fault displayed on the UIM indicates a potentially damaged anode rod. If the powered anode rod has been damaged, it should be removed and replaced from the water heater tank. -
Page 53: Temperature-Pressure Relief Valve Test
If the Temperature-Pressure Relief Valve on the water heater weeps NOTE: Whether re-installing or replacing the anode rod, check for any leaks and immediately correct if found. or discharges periodically, this may be due to thermal expansion. To replace the anode: NOTE: Excessive water pressure is the most common cause of Turn off gas and electric supply to the water heater. -
Page 54: Service
TO DRAIN THE WATER HEATER STORAGE TANK: 7. Flush the water heater storage tank to remove sediment and allow the water to flow until it runs clean. 1. Turn off the electrical supply to the water heater. 8. Close the water heater drain valve when flushing is completed. 2. -
Page 55: Leakage Checkpoints
LEAKAGE CHECKPOINTS Never use this water heater unless it is completely filled with water. To prevent damage to the tank, the tank must be filled with water. B:Anode Water must flow from the hot water faucet before turning “ON” gas Connection to the water heater. -
Page 56: Troubleshooting
TROUBLESHOOTING SEQUENCE OF OPERATION INSTALLATION CHECKLIST Read the Sequence of Operation section before attempting The list below represents some of the most critical installation to correct any operational problems. Refer to Features and requirements that, when overlooked, often result in operational Components (page 10) for the location of various water heater problems, down time and needless parts replacement. -
Page 57: Sequence Of Operation Flow Chart
SEQUENCE OF OPERATION FLOW CHART If tank temperature drops below Operating Set Point minus Differential setting a heating cycle is activated Control System performs diagnostic checks Control System Locks Out Normal State of all pressure switches and ECO are checked Displays Fault Msg Pressure switches and ECO are verified closed Combustion Blower is energized... -
Page 58: Operational Problems
OPERATIONAL PROBLEMS If the Main Burner ignites momentarily but does not sustain ignition allow the water heater to try to ignite up to two more times until control system locks out and the Ignition Failure Fault message is displayed on the control system's LCD. If the water heater is experiencing rough starts - see Rough Starting, Rough Operation on this page. -
Page 59: Fault And Alert Conditions
FAULT AND ALERT CONDITIONS are operational problems. This is not a complete list. Along with each of the Fault and Alert messages described there will be a list FAULT CONDITIONS of possible causes and things to check and repair. When the control system declares a Fault condition it will display a Only qualified service technician, as defined in Qualifications using Fault message on the control system's LCD with an exclamation "!"... - Page 60 FAULT AND ALERT MESSAGES (CONT) Call the technical support phone number listed on the back cover for further technical assistance or to locate a qualified service technician in your area. Possible Causes - Check/Repair Displayed Fault/Alert Message Blocked Air Intake •...
-
Page 61: Diagrams
DIAGRAMS CENTRAL CONTROL BOARD (CCB) LAYOUT Figure 46. Central Control Board Layout... -
Page 62: Wiring Diagram
WIRING DIAGRAM CAUTION LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS. WIRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS OPERATION. VERIFY PROPER OPERATION AFTER SERVICING. Blower 24Vureg 1 White / Brown Speed f-back 2 White / Orange 1 White/Brown 4 White / Blue PWM Signal 2 White/Blue 5 White / Green... - Page 63 Spark Module 24Vureg 1 White/Brown PWM Signal 2 White/Blue 1 Red 120V 1 Red Neutral 2 Black Neutral Speed f-back 120 to Spark 2 Black 3 Green Ground 4 White/Orange Dgnd 5 White/Green 4 White/Green 3 Orange BURNER 1 Blue Upper Temperature BOLT Probe / ECO...
-
Page 64: Notes
Copyright © 2018, All rights reserved.
Need help?
Do you have a question about the 300 Series and is the answer not in the manual?
Questions and answers