Table of Contents
Advertisement
100161775 / 2000019057 / VFS-I-O Rev C
Installation & Operation Manual
Models: 500 - 2000
Up To 4:1 Turndown
WARNING:
This manual supplies information for the
installation, operation, and servicing of the
appliance. It is strongly recommended that this
manual and the VF Series Service Manual be
reviewed completely before proceeding with an
installation. 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.
Advertisement
Table of Contents
Summary of Contents for VF VWH0500N
- Page 1 This manual supplies information for the installation, operation, and servicing of the appliance. It is strongly recommended that this manual and the VF Series Service Manual be reviewed completely before proceeding with an installation. Perform steps in the order given.
-
Page 2: Table Of Contents
PLEASE READ BEFORE PROCEEDING ..... 3-4 7. START-UP RATINGS ................5 Check / Control Water Chemistry ........40 THE VF SERIES -- HOW IT WORKS ......6-8 Filling Hot Water Heater ........... 40 Check for Gas Leaks ............40 1. DETERMINE UNIT LOCATION Location of Unit .............. -
Page 3: Please Read Before Proceeding
Installation & Operation Manual Please read before proceeding This is a gas appliance and should be installed Improper installation, adjustment, NOTICE WARNING by a licensed electrician and/or certified gas alteration, service or maintenance can supplier. Service must be performed by a cause injury or property damage. - Page 4 Installation & Operation Manual Please read before proceeding To minimize the possibility of serious WARNING personal injury, fire, or damage to your appliance, never violate the following safety rules: 1. Water heaters are heat producing appliances. To avoid damage or injury, do not store materials against the appliance or the vent-air intake system.
-
Page 5: Ratings
Maximum allowed working pressure is located on the rating plate. NOTICE Notes: 3. The VF Series is equipped for operation up to 2000 feet, and 1. The ratings are based on standard test procedures prescribed including up to 4000 feet, with no field adjustments. The by the United States Department of Energy. -
Page 6: The Vf Series - How It Works
Installation & Operation Manual The VF Series - How it works... 14. Control module Heat exchanger The heat exchanger allows system water to flow through specially The control module is the main control for the appliance. This designed tubes for maximum heat transfer. The glass lined module contains the programming that operates the blower, gas valve, and pumps in addition to other programmable features. - Page 7 Installation & Operation Manual The VF Series - How it works... (continued) 28. Drain port(s) 30. Ventilation fan Location from which the heat exchanger can be drained. Provides air circulation around the controls inside the unit. 31. Manual shutoff valve 29.
- Page 8 Installation & Operation Manual The VF Series - How it works... IMG00616 IMG00615 Models 1500 - 2000 Rear View Models 1500 - 2000 Front View IMG00617 IMG00618 Models 1500 - 2000 Left Side (inside unit) Models 1500 - 2000 Right Side (inside unit)
-
Page 9: Determine Unit Location
Installation & Operation Manual Determine unit location Recommended service clearances Location of unit 1. 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 24"... -
Page 10: Combustion And Ventilation Air Requirements
Installation & Operation Manual Determine unit location 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. - Page 11 Installation & Operation Manual Determine unit location (continued) 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.
- Page 12 Installation & Operation Manual Determine unit location 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 or B149.2. Check all local code requirements for combustion air. 500 - 1000 All dimensions based on net free area in square inches.
-
Page 13: Venting
Installation & Operation Manual Venting BEFORE YOU BEGIN Identify your appliance’s vent system: This manual covers venting requirements for CAT II/IV models. Be sure to correctly identify the type of vent system your appliance requires before proceeding. Category II/IV Models: See page 15 Venting options: CAT II requires vent VWH0500... -
Page 14: Vent Materials
9910116002 VWH1500 6" VWH1500 6" to 8" 9910116003 VWH2000 8" VWH2000 8" to 10" 9910116004 *Note: The manufacturer of the selected vent material can also provide a vent adapter to connect the vent material to the VF Series vent connection. -
Page 15: Condensing Vent Options: Cat Ii & Iv
Installation & Operation Manual Venting (continued) Condensing Vent Options: CAT II & IV (CAT II vent options A, B, & C requires an adapter kit - see page 14) Vertical vent with combustion air from Sidewall termination with combustion air from equipment room - see page 16. - Page 16 Installation & Operation Manual Venting Condensing vent options: CAT II & IV (CAT II vent options A, B, & C requires an adapter kit - see page 14) Vertical vent with combustion air from equipment room - see page 15. The flue outlet terminates on the rooftop.
- Page 17 Installation & Operation Manual Venting (continued) Condensing vent options: CAT II & IV (CAT II vent options A, B, & C requires an adapter kit - see page 14) Vent/Air Vertical installation with sidewall combustion air inlet - see page The Vent/Air Vertical with a Sidewall Combustion Air Vent system terminates the flue at the rooftop and air inlet at the sidewall.
- Page 18 Installation & Operation Manual Venting Condensing vent options: CAT IV Horizontal direct vent installation with sidewall combustion air inlet - see page 15. The horizontal direct vent system is installed with a Category IV flue and a separate combustion air pipe to the outdoors. The flue outlet and combustion air intake must both terminate on the same sidewall.
-
Page 19: Common Venting Cat Ii & Iv Venting Information
Common Venting CAT II: Flues of multiple VF Series water heaters may be combined by incorporating a vent increaser to change the Category IV appliance to a Category II vent system which can be common vented using an engineered vent system. The increaser kit must be provided by the manufacturer and the combined engineered vent system must be designed to ensure that flue products will be properly exhausted from the building at all times. - Page 20 Installation & Operation Manual Venting CAT IV Specific venting information : Vent options A, B, C, D, E, & F (continued) Do not use an existing chimney as a raceway if another appliance or fireplace is vented through the chimney. The weight of the venting system must not rest on the unit.
-
Page 21: Vertical Vent Options
Installation & Operation Manual Venting (continued) Vertical Air Inlet: Vent options B & F Vertical combustion air inlet The air inlet cap for the vertical rooftop air inlet is assembled from components purchased locally. The air inlet cap consists of two 90°... -
Page 22: Horizontal Vent Options
Installation & Operation Manual Venting Horizontal Air Inlet: Vent options C, E, & F Sidewall combustion air inlet The sidewall termination caps for both the flue products and combustion air must be purchased from the appliance manufacturer. The part numbers for the required sidewall termination kit are listed under each designated table. Each kit includes both the special combustion air inlet cap and the sidewall flue cap for installation on an exterior sidewall. -
Page 23: All Categories
Installation & Operation Manual Venting (continued) Length of air inlet pipe for both vertical and horizontal - Vent options: All Categories The maximum installed length of the air inlet pipe from the appliance to the air inlet cap is 50 equivalent feet (15.2m) in length. Subtract 5 feet (1.52m) of equivalent length for each 90°... - Page 24 Installation & Operation Manual Venting Vertical Vent Termination Clearances - Venting options: A, B, & C Figure 2-8_Vent Termination from Flat Roof - 10 ft. Figure 2-6_Vent Termination from Peaked Roof - 10 ft. or Less From Parapet Wall or Less From Ridge Figure 2-7_Vent Termination from Peaked Roof - 10 ft.
- Page 25 Installation & Operation Manual Venting (continued) Vertical Vent Termination Clearances - Venting options: A, B, & C Flue gases from this appliance may contain large amounts of water vapor that will form a white plume in winter. Plume could obstruct window view. Flue gas condensate can freeze on exterior surfaces or on the vent cap.
- Page 26 Installation & Operation Manual Venting Sidewall Vent Termination Clearances - Venting options: D, E, & F MECHANICAL DRAFT VENT TERMINATION Figure 2-12_Vent Above Window Figure 2-10_Vent to Forced Air Inlet Figure 2-13_Direct Vent Clearance Figure 2-11_Vent to Doors and Windows...
-
Page 27: Gas Connections Gas Supply
10 feet from the tested before placing it in operation. appliance. Failure to do so may result in Checking manifold gas pressure insufficient gas volume supplied to the appliance. Reference the VF Series Service Manual for information regarding manifold gas pressure. -
Page 28: Gas Piping
Installation & Operation Manual Gas connections TABLE - 3C GAS PIPING SIZE CHART Nominal Length of Pipe in Straight Feet Iron Pipe Maximum Size Capacity of Pipe Inches in Thousands of Btu/hr per hour for gas pressures of 14 Inches Water Column (0.5 PSIG) or less 1 1/4... -
Page 29: Checking Gas Supply Pressure
The burner should ignite promptly. Flame pattern should be stable, see “Maintenance - Normal Flame Pattern” in the VF Series Service Manual. Turn system off and allow burner to cool, then cycle burner again to ensure proper ignition and flame characteristics. -
Page 30: High And Low Gas Pressure Switches
DOWNSTREAM VALVE TEST VALVE GAS VALVE “FIELD PROVIDED” BALL VALVE (IF REQUIRED BY LOCAL CODES) Figure 3-4_Gas Train Assembly VF 1500 - 2000 PRESSURE BALL VALVE SWITCH W/PRESSURE TAP Venting of gas train components - and optional gas train components... -
Page 31: Water Connections
Initial set-up of maximum water flow For ease of service, install unions on the inlet and outlet On initial start-up of the VF water heater, the maximum water of the appliance. The connection to the appliance marked flow to the heat exchanger must be checked and manually “Water Inlet”... -
Page 32: Water Heater Installations
Installation & Operation Manual Water connections Low water cutoff The water heater system should not be CAUTION operated at less than 12 PSIG. If this water heater is installed above radiation level, a low water cutoff device must be installed at the time of installation. Hot water piping must be supported by suitable hangers or floor An electronic low water cutoff is available as a factory supplied stands, NOT by the water heater. - Page 33 Installation & Operation Manual Water connections (continued) Low temperature bypass requirements Circulator pump specifications Maximum operating pressure for the pump must exceed To prevent condensation problems, a water heater MUST NOT system operating pressure. be operated (other than for brief periods during initial system Maximum water temperature should not exceed the startup) with an inlet water temperature of less than 140°F nameplate rating.
- Page 34 Installation & Operation Manual Water connections TABLE - 4B TABLE - 4C Pressure Drop Chart Pressure Drop Chart Models 1500-2000 Models 500-1000 Flow in Gallons Per Minute Flow in Gallons Per Minute Typical water heating installations TABLE - 4D General plumbing rules: ACCEPTABLE TEMPERATURE RISE Check all local codes.
-
Page 35: Electrical Connections
Installation & Operation Manual Electrical connections Water heater operating control module TABLE - 5A AMP DRAW DATA The operating temperature control for the appliance is the Blower & Approximate Total control module. It is located on the inside of the control panel, Model Pump FLA* Controls... -
Page 36: Ems Or Remote Thermostat Connection
Installation & Operation Manual Electrical connections EMS or remote thermostat connection LOUVER CONTROL UNIT PUMP 120VAC UNIT SUPPLY SUPPLY SUPPLY SUPPLY An EMS, remote thermostat or other remote temperature control may be connected to the water heater (see FIG. 5-3). Follow the manufacturer’s instructions supplied with the remote temperature control for proper installation and adjustment. -
Page 37: Louver Proving Switch
Installation & Operation Manual Electrical connections (continued) Louver proving switch 1. When the operation of a louver proving switch needs to be verified before the water heater fires, remove the jumper wire from these terminals and connect them to the normally open contacts on its proving switch (FIG. -
Page 38: Low Voltage Field Wiring Connections
Installation & Operation Manual Electrical connections Figure 5-4_Low Voltage Field Wiring Connections... -
Page 39: Condensate Disposal
Installation & Operation Manual Condensate disposal Condensate trap installation Locate the condensate trap kit shipped loose with the appliance. The kit includes a sheet metal mounting base, two (2) nuts and the condensate trap. Install the condensate trap mounting base on the rear of the appliance in the lower left-hand corner as depicted in FIG. -
Page 40: Start-Up
Installation & Operation Manual Start-up Check/control water chemistry Inspect/fill condensate system Inspect/check condensate lines and fittings Do not use petroleum-based cleaning or CAUTION sealing compounds in the water heater 1. Inspect the condensate drain line, condensate PVC fittings system. Damage to elastomer seals and and condensate trap. -
Page 41: Placing The Water Heater In Operation
4. Is gas turned on at meter or water heater? 5. Is incoming gas pressure less than 4 inches water column? If none of the above corrects the problem, refer to the Troubleshooting section of the VF Series Service Manual. -
Page 42: Operating Instructions
Installation & Operation Manual Start-up Figure 7-2_Operating Instructions... -
Page 43: Operating Information General
The blower provides both primary and secondary air to Modulation the burner and forces the flue products out of the combustion The VF Series is capable of modulating its firing rate from a chamber and into the vent system. The control module minimum of 25% to a maximum of 100%. -
Page 44: Water Heater Temperature Regulation
Installation & Operation Manual Operating information Freeze protection Run-time and alarm outputs DO NOT install the appliance in a room likely to freeze. The appliance provides dry contacts for indicating when the appliance is running, and when it is unable to operate. The following integral feature of the control module provides some protection for the appliance only -- not for the system. -
Page 45: Sequence Of Operation
Installation & Operation Manual Operating information (continued) Sequence of operation OPERATION DISPLAY 1. The manual reset high limit must be closed before any action will take HTR: Standby place. OUT: 123.8F(129) 2. Upon a call for heat the control turns on the appropriate pumps. The flow HTR: Standby switch and low water cutoff (if equipped) must close. -
Page 46: Vf Series Control Module
Remember to press the SAVE/CLEAR button when finished programming in order to save the changes made. See the VF Series Service Manual for a detailed description of parameters and access modes. -
Page 47: Status Display Screens
Installation & Operation Manual Operating information (continued) Status display screens Status Display Screens By using the Back/Forward (, ) arrow keys on the display panel, you can navigate through the nine (9) 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: Description... - Page 48 Installation & Operation Manual Operating information Status Display Screens (cont’d) By using the Back/Forward (, ) arrow keys on the display panel, you can navigate through the nine (9) 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: Description...
-
Page 49: Domestic Water Heaters
The Service Mode can be used to force the water flow through the heat exchanger must be manually set before heater to run at full fire. See the VF Series Service Manual normal operation begins. for a detailed explanation of the Service Mode. Check the... -
Page 50: Water Chemistry
Installation & Operation Manual Domestic water heaters Water chemistry If the temperature rise is too high, the water velocity is too low, adjust as follows: Water temperature rise and maximum flow NOTICE data is based on heating potable water with 1. - Page 51 Installation & Operation Manual Domestic water heaters (continued) Figure 9-1_Typical Water Heater Piping with Storage Tank 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 52 Installation & Operation Manual Domestic water heaters Figure 9-2_Single Water Heater Piping with Two Storage Tanks 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 53 Installation & Operation Manual Domestic water heaters (continued) Figure 9-3_Multiple Water Heater Piping with a Single Storage Tank 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 54 Installation & Operation Manual Domestic water heaters Figure 9-4_Multiple Water Heater Piping with Multiple Storage Tanks 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 55: Pump Operation
Installation & Operation Manual Domestic water heaters (continued) The standard circulating pump on this water heater is sized TABLE 9C based on installation of a single storage tank and heater in close COMMON WATER MANIFOLD SIZE FOR proximity. If the number of fittings and straight pipe exceeds the specified maximum equivalent number of straight feet MULTIPLE WATER HEATER INSTALLATIONS for a specified diameter of pipe, non-warrantable operational... -
Page 56: Thermostat Adjustment Procedure
Installation & Operation Manual Domestic water heaters Thermostat adjustment procedure An appliance allowed to operate at return CAUTION temperatures below the specified minimum 1. Press the (+) or (-) button to view the set point setting may experience problems with setting. -
Page 57: Adjustable High Water Temperature Limit Control
Installation & Operation Manual Domestic water heaters (continued) A high limit control is located on the inside of the left front The following chart (Table 9E) details the relationship of water panel, as shown in FIG. 9-6. The setting of this control knob temperature and time with regard to scald injury and may be limits maximum discharge water temperature. -
Page 58: Maintenance Maintenance And Annual Startup
Installation & Operation Manual Maintenance Maintenance and annual startup Table 10A_Service and Maintenance Schedules Owner maintenance Service technician (see the VF Series User’s Information Manual for (see the following pages for instructions) instructions) General: • Address reported problems • Check appliance area •... - Page 59 Installation & Operation Manual Maintenance (continued) Follow the service and maintenance procedures given throughout this manual and in component literature WARNING shipped with the appliance. Failure to perform the service and maintenance could result in damage to the appliance 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 60 Installation & Operation Manual Maintenance Flue vent system and air piping Safety relief valves should be re-inspected WARNING AT LEAST ONCE EVERY THREE YEARS, by a licensed plumbing contractor or 1. Check for gastight seal at every connection, seam of air authorized inspection agency, to ensure piping, and vent piping periodically inspected by a qualified that the product has not been affected by...
- Page 61 1. Set the control module display to Parameter Mode and burner, excessive primary air or high draft. check all settings. See Section 1 of the VF Series Service Manual. Adjust settings if necessary. See Section 1 of the If improper flame is observed, examine the venting system, VF Series Service Manual for adjustment procedures.
- Page 62 Installation & Operation Manual Maintenance Check flue gas passageways Access to the burner will require the following steps: Turn off main electrical power to the appliance. Any sign of soot around the inner jacket, outer jacket, flue pipe connections, burner or in the areas between the fins on Turn off main manual gas shutoff to the appliance.
- Page 63 Review with owner 10. Ensure that any soot present on the burner is removed. See Inspect and Clean Burner section of the VF Series 1. Review the VF Series User’s Information Manual with the Service Manual.
-
Page 64: Connection Diagram
Installation & Operation Manual Connection diagram LO-GAS PRESSURE SWITCH PROOF OF CLOSURE P ROOF CLOS E V ALV E PR / V ALV E RE LAY O/ BK BR/W HI-GAS PRESSURE SWITCH NOTE CONNECTIONS FOR FIELD INSTALLED GY GY ITEMS. SEE I &O MANUAL FOR DETAILS . 1 2 3 4 5 LOUVER HI-LIMIT... -
Page 65: Ladder Diagram
Installation & Operation Manual Ladder diagram BOILER BOILER SUPPLY SUPPLY PUMP LOUVER ALARM TERMINAL PUMP SUPPLY CONTACTS CONTACTS STRIP SUPPLY BLOWER BLOWER LOUVER ALARM RELAY RELAY RELAY UNIT UNIT PUMP PUMP RELAY PROOF OF PROOF OF CLOSURE RELAY CLOSURE VALVE VENTILATION FAN CHASSIS ON/OFF... - Page 66 Installation & Operation Manual Notes...
-
Page 67: Warranty
Installation & Operation Manual Warranty LIMITED WARRANTY A. O. Smith Corporation, the warrantor, extends the following LIMITED WARRANTY to the owner of this water heater: If within FIVE years after initial installation of the water heater, a heat exchanger or gas burner shall prove upon examination by the warrantor to be defective in material or workmanship, the warrantor, at his option will exchange or repair such part or portion. - Page 68 Revision Notes: Revision A (ECO #C12846) initial release. Revision B (ECO #C14970) reflects wiring and ladder diagram updates. Revision C (Change # 500001030) reflects the update of Table 4-D on page 34 as well as the addition of the factory startup logo on the manual cover. 100161775 / 2000019057 / VFS-I-O Rev C 10/15...
Need help?
Do you have a question about the VWH0500N and is the answer not in the manual?
Questions and answers