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AWII-SER Rev A
Service Manual
Models: 151 - 801
This manual must only be used by a
WARNING
qualified heating installer / service
technician. Read all instructions,
including this manual and the Armor
Water Heater Installation and
Operation 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.
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Contents 2. MAINTENANCE CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Maintenance and Annual Startup . . . . . . . . . . . . . . . . . . 19-23 Hazard Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 3. TROUBLESHOOTING PLEASE READ BEFORE PROCEEDING . . . . . . . . . . . . 3 Before Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Handling Ceramic Fiber Materials . . . . . . . . . . . . . . . . . . . 3 Check Con
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Service Manual Please read before proceeding Installer – Read all instructions, When calling or writing about the water heater – WARNING NOTICE including this manual and the Armor Please have the water heater model and serial Water Heater Installation and Operation number from the water heater rating plate. Manual, before installing. Perform steps Consider piping and installation when in the order given. determining water heater location (see the Have this water heater serviced/inspected Armo
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Service Manual What is in this manual? Service Maintenance � Service and maintenance schedules � Address reported problems The Armor water heater display � Inspect water heater area and water heater interior � Display panel readout, buttons and their functions � Clean condensate trap � Check all piping for leaks Control module inputs � Check air openings � Control module inputs and options � Flue vent system and air piping � Check water system Control module outputs � Check water heater relief v
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Service Manual 1 Service The Armor water heater display NAVIGATION DIAL (PRESS OR TURN) RESET KEY RIGHT SELECT KEY LEFT SELECT KEY (SOFT KEY) (SOFT KEY) The information on the bottom of the display shows the functions of the two SELECT keys (on either corner), and the NAVIGATION dial (in the center): MENU = Left SELECT Key SETPOINTS = NAVIGATION Dial - Pressing Down SHDN = Right SELECT Key 5
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Service Manual 1 Service Control inputs GAS PRESSURE SWITCH DHW THERMOSTAT LOW VOLTAGE FLOW SWITCH CONNECTION BOARD TANK SENSOR SEQUENCER / BUILDING MANAGEMENT SYSTEM LOW WATER CUTOFF INLET TEMPERATURE SENSOR OUTLET TEMPERATURE SENSOR FLUE GAS SENSOR AIR PRESSURE SWITCH LOUVER PROVING SWITCH FLAME SENSOR BLOCKED DRAIN SWITCH SMART SYSTEM CONTROL BOARD DISPLAY PANEL PC INTERFACE 6
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Service Manual 1 Service (continued) Control outputs ALARM BELL LOW VOLTAGE LOUVER RELAY CONNECTION BOARD RUN TIME CONTACTS SEQUENCER / BUILDING MANAGEMENT SYSTEM BUILDING RECIRCULATION PUMP WATER HEATER PUMP IGNITOR BLOWER SMART SYSTEM GAS VALVE CONTROL BOARD DISPLAY PANEL PC INTERFACE 7
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Service Manual 1 Service General Operation How the water heater operates The Armor water heater uses an advanced stainless steel heat exchanger and an electronic control module that allows fully condensing operation. The blower pulls in gas and air and pushes flue products out of the water heater through the heat exchanger and flue piping. The control module regulates blower speed to control water heater firing rate. The gas valve senses the amount of air flowing into the water heater and al
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Service Manual 1 Service (continued) Table 1A Sequence of operation OPERATION DISPLAY 1. The control will turn on the water heater pump (always ON except in Night Setback). The flow switch and/or LWCO must close. 2. The control turns on power to the louver relay. The louver proving switch, air pressure switch, and blocked drain switch must close. 3. The control starts a 15 second prepurge cycle. 4. The control starts a 4 second trial for ignition by firing the spark electrode and opening t
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Service Manual 1 Service Display panel menu access Table 1B Use this procedure to access menus from the display panel SCREEN BUTTON OPERATION DISPLAY STATUS [SHDN] Press the RIGHT SELECT soft key [SHDN]. [YES] Press the LEFT SELECT soft key [YES]. Press and hold the LEFT SELECT soft key [MENU] [MENU] for five (5) seconds. Rotate the NAVIGATION dial clockwise until 5 is displayed (first digit on the left). Press the NAVIGATION dial to select the next digit. Rotate the NAVIGATION dial clockwise u
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Service Manual 1 Service (continued) Display panel parameter access Table 1C This is a typical example of accessing a parameter, shown for parameter DHW Settings, TANK MIN Setpt SCREEN BUTTON OPERATION DISPLAY STATUS This example shows how to access parameter Temperature Settings. The first display shown is at the beginning of the menu listings, after entering the installer access code. Rotate the NAVIGATION dial counterclockwise until the arrow (>) is next to DHW SETTINGS. Press the NAVIGATIO
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Service Manual 1 Service Parameter table Table 1D This table lists SMART SYSTEM control module parameters and where to access them User Access Installer Access Sub See Menu Description Item Page Display Modify Display Modify 1 Date and Time 14 Yes Yes Yes Yes 2 Software Version (read only) 14 No No Yes No 3 Temperature Units (ºC/ºF) 14 Yes Yes Yes Yes A 4 DHW Night Setback Offset 14 No No Yes Yes 5 DHW Night Setback On Times 14 No No Yes Yes 6 DHW Night Setback Off Times 14 No No Yes Yes 7 Disp
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Service Manual 1 Service (continued) Parameter table Table 1D (continued from previous page) This table lists SMART SYSTEM control module parameters and where to access them User Access Installer Access Sub See Menu Description Item Page Display Modify Display Modify 1 BMS Tstat Input (Active/Inactive) 16 No No Yes Yes 2 BMS (Active/Inactive) 16 No No Yes Yes 3 ModBus (Active/Inactive) 16 No No Yes Yes 4 ModBus T/O (Timeout) 16 No No Yes Yes 5 Cascade Address 16 No No Yes Yes F 6 Cascade Type (
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Service Manual 1 Service Viewable and changeable control parameters Before changing parameters, note the Domestic Hot Water (DHW) Night Setback On CAUTION settings so that the unit can be returned to Times its original operating parameters. This is the time at which the DHW Night Setback Offset becomes active. There are 7 start times and 7 stop times. A: General Both may be set to any time within a 7-day week. These settings are referred to as triggers. Multiple start or stop Date and Time
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Service Manual 1 Service (continued) B: Data Logging Tank Minimum Set Point This setting controls the minimum user set point for the tank Reset last 10 errors temperature. The installer can adjust this by accessing The reset last 10 errors function clears the last 10 errors log. parameter D4. The minimum setting is 60°F (16°C) and the maximum setting is the maximum tank set point (parameter C: Functions D5). Service Mode Delay Tank Maximum Set Point By pressing the pin button on the front of
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Service Manual 1 Service Cascade Address F: Control modes The water heater designated as the Leader needs to be BMS Thermostat Input (Active / Inactive) programmed with address 0. All the Member water heaters When controlling the water heater through the 0 - 10V BMS require addresses from 1 to 7, and the addresses must be input or through ModBus, the water heater can be enabled different for each Member. The addresses can be in any one of two ways. With parameter F1 set to ACTIVE, the order
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Service Manual 1 Service (continued) Maximum Cascade Outlet Set Point H: BMS This parameter determines the set point used by the BMS Type (Power / Set Point) individual water heaters in a Cascade. When a water heater When programmed for BMS control through the 0 - 10V is commanded to fire by the Leader water heater, it will BMS input or through ModBus, the 0 - 10V signal can be attempt to achieve this temperature at its outlet. The interpreted as either a modulation command or a set point. Le
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Service Manual 1 Service Set Point at Maximum Volts Service Notification Cycles When programmed for BMS control through the 0 - 10V When the water heater control determines that a scheduled BMS input or through ModBus and the BMS Type is service is due based on the number of water heater cycles, the programmed as SETPOINT, the set point represented by the water heater display will alternate the standard water heater Volts at Maximum parameter (H4) is set by parameter H7. display text with the m
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Service Manual 2 Maintenance Maintenance and annual startup Table 2A Service and Maintenance Schedules Service technician Owner maintenance (see the following pages for instructions) General: • Check water heater area • Address reported problems • Check pressure/temperature • Inspect interior; clean and vacuum if gauge necessary; Daily • Clean condensate trap and fill with fresh water •Check for leaks (water, gas, flue, condensate) • Verify flue and air lines in good condition and sealed
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Service Manual 2 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. The water heater should be inspected annually only by a qualified serv
