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This manual must only be used by a
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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Table of Contents
Related Manuals for Lochinvar ARMOR 151 - 801
Summary of Contents for Lochinvar ARMOR 151 - 801
- Page 1 This manual must only be used by a qualified heating installer / service technician. Read all instructions, including this manual and the Armor Water Heater Installation Operation Manual, before installing. Perform steps in the order given. Failure to comply could result in severe personal injury, death, or substantial property damage.
- Page 2 When servicing water heater ....3 Water heater operation ......3 .
- Page 3 ¢ Apply enough water to the combustion chamber lining to prevent airborne dust. ¢ Remove the combustion chamber lining from the water heater and place it in a plastic bag for disposal. ¢ Wash potentially contaminated clothes separately from other clothing.
- Page 4 • H: BMS • I: Service Notification • Service and maintenance schedules • Address reported problems • Inspect water heater area and water heater interior • Clean condensate trap • Check all piping for leaks • Check air openings • Flue vent system and air piping •...
- Page 5 Service Manual 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...
- Page 6 Service Manual 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...
- Page 7 LOW VOLTAGE CONNECTION BOARD SMART SYSTEM CONTROL BOARD Service Manual ALARM BELL LOUVER RELAY RUN TIME CONTACTS SEQUENCER / BUILDING MANAGEMENT SYSTEM BUILDING RECIRCULATION PUMP WATER HEATER PUMP IGNITOR BLOWER GAS VALVE DISPLAY PANEL PC INTERFACE...
- Page 8 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 allows only the right amount of gas to flow.
- Page 9 Table 1A 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. proving switch, air pressure switch, and blocked drain switch must close.
- Page 10 Table 1B [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).
- Page 11 Service Manual Table 1C Rotate the NAVIGATION dial counterclockwise until the arrow (>) is next to DHW SETTINGS. Press the NAVIGATION dial one time. Rotate the NAVIGATION dial counterclockwise until the arrow (>) is next to TANK MIN SETPT. Press the NAVIGATION dial one time. Rotate the NAVIGATION dial to the desired temperature.
- Page 12 Table 1D Date and Time Software Version (read only) Temperature Units (ºC/ºF) DHW Night Setback Offset DHW Night Setback On Times DHW Night Setback Off Times Display Timeout Reset Last 10 Errors Service Mode Delay Tank Set Point Tank Set Point Offset Tank Set Point Differential Tank Minimum Set Point Tank Maximum Set Point...
- Page 13 Table 1D BMS Tstat Input (Active/Inactive) BMS (Active/Inactive) ModBus (Active/Inactive) ModBus T/O (Timeout) Cascade Address Cascade Type (L/L / EFF) Max Cascade Outlet Set Point Min On/Off Time Min Next On Time Boiler Size DHW Pump Delay DHW Pump Anti-Seize Delay BMS Type (Power / Set Point) Volts at Min Volts at Max...
- Page 14 The control uses an internal clock for the night setback feature and for logging of events. For these features to work correctly, the clock must be set when the water heater is first installed or anytime the water heater has been powered off for more than four (4) hours.
- Page 15 The delay sets the length of time the water heater will stay in the Service Mode if no keys have been pressed before going back to its original state.
- Page 16 20% and reduce the previous water heater to 80%. When the calculated load is decreasing and the last water heater gets down to 20% fire, it will hold it there and start lowering the firing rate on the next-to-last water heater.
- Page 17 0 minutes to 40 minutes. The default time is 30 seconds. If the water heater pump does not run for 24 hours, it will be turned on briefly to prevent it from seizing. The length of time it runs is determined by parameter G2. The range of this setting is 0 seconds to 40 minutes.
- Page 18 0 hours to 100,000 hours. The default time is 8,760 hours. When the water heater control determines that a scheduled service is due based on the number of water heater cycles, the water heater display will alternate the standard water heater display text with the message SERVICE DUE every 5 seconds.
- Page 19 • Check air and vent termination screens • Check relief valve • Check condensate drain system • Check air vents • Check Delta T (Temperature Rise) • Check water heater piping (gas and water) for leaks • Operate relief valve...
- Page 20 Electrical shock hazard – Turn off power to the water heater before any service operation on the water heater except as noted otherwise in this instruction manual. Failure to turn off electrical power could result in electrical shock, causing severe personal injury or death.
- Page 21 1. Verify all system components are correctly installed and operational. 2. Verify system pressure is at least 12 PSI. 3. Watch the system pressure as the water heater heats up (during testing) to ensure pressure does not rise too high. Excessive pressure rise indicates expansion tank sizing or performance problem.
- Page 22 4. Replace ground wires if ground continuity is not satisfactory. 1. Inspect all water heater wiring, making sure wires are in good condition and securely attached. 1. Set the SMART SYSTEM control module display to Parameter Mode and check all settings. See Section 1 of this manual.
- Page 23 11. Close isolation valves on piping to isolate water heater from system. Attach a hose to the water heater drain and flush water heater thoroughly with clean water by using purging valves to allow water to flow through the water make-up line to the water heater.
- Page 24 F2 - 3.15 AMP FUSE BLOWER 5. The water heater is shipped with three (3) spare fuses in a plastic bag attached to the control module cover. 6. If necessary, replace open fuse (F3 is .80 amps, F2 is 3.15 amps, and F1 is 5 amps).
- Page 25 - Main control board temperature set point satisfied. - Remote thermostat satisfied. - Unit locked out on fault. - Water heater controlled by BMS. - Flue sensor open. Service Manual • Check external line switch, fuse, or breaker. • Check position of ON/OFF switch. Turn switch to the ON position.
- Page 26 It is important to note that the flue and outlet water sensors have two temperature sensing devices in one housing. These devices are designated as S1a/S1b, outlet sensor and S3a/S3b, flue sensor. Please reference the wiring diagram in the Armor Water Heater Installation and Operation Manual for correct terminal location.
- Page 27 37-38 of this manual for the proper gas valve setting. exceed the maximum listed in the General Venting section of the Armor Water Heater Installation and Operation Manual. • Refer to page 22 in this manual for the burner removal and inspection procedure.
- Page 28 • Correct the supply gas pressure if necessary. • Check for a loose or misplaced jumper if pressure switches are not installed. • Check water heater pump operation on a call for heat. • Check for closed valves or obstructions in the water heater piping.
- Page 29 LP gas pressures should be between 8 - 14 inches w.c. Refer to Section 7 - Gas Connections of the Armor Water Heater Installation and Operation Manual for detailed information concerning the gas supply. • Verify that the plastic hose from the gas valve to the air inlet is connected and is not damaged.
- Page 30 LP gas pressures should be between 8 - 14 inches w.c. Refer to Section 7 - Gas Connections of the Armor Water Heater Installation and Operation Manual for detailed information concerning the gas supply. • Verify that the plastic hose from the gas valve to the air inlet is connected and is not damaged.
- Page 31 Armor Installation and Operation Manual for the proper piping methods for the Armor water heater. • Check 120 vac to water heater pump motor on a call for heat. If voltage is not present, check wiring back to the main control board.
- Page 32 Service Manual • Vent/air intake lengths exceed the maximum allowed lengths. Refer to Section 3 - General Venting of the Armor Water Heater Installation and Operation Manual for proper lengths. • Check for obstruction or blockage in the vent/air intake pipes or at terminations.
- Page 33 Manual for the proper piping methods for the Armor water heater. • Check for 120 VAC to the water heater pump motor on a call for heat. If voltage is not present, check the wiring back to the main control board. Replace the main control board if necessary.
- Page 34 Manual for the proper piping methods for the Armor water heater. • Check for 120 VAC to the water heater pump motor on a call for heat. If voltage is not present, check wiring back to the main control board. Replace the main control board if necessary.
- Page 35 Table 3F 120 VAC input to the main control board has dropped below 80 VAC. The main control board has detected an internal fault. The main control board has detected an internal fault. The main control board has detected an internal fault.
- Page 36 Table 3H • Refer to Section 3 - General Venting of the Armor Water Heater Installation and Operation Manual for the proper venting and air intake methods for the Armor water heater. • Check for obstructions at the vent/air intake terminals.
- Page 37 If adjustment of the gas valve is deemed necessary, use the following procedures: (Note: The procedures in this section are model specific.) Locate the throttle adjustment screw on the side of the venturi valve (FIG. 3-2). Using a screwdriver, turn the screw a 1/4 turn clockwise to decrease CO counterclockwise to increase CO levels.
- Page 38 Locate the throttle adjustment screw on top of the gas valve, see FIG. 3-4. Using a screwdriver, turn the screw a 1/4 turn counterclockwise to increase CO levels or a 1/4 turn clockwise to decrease CO levels. After one adjustment on the valve, follow the Combustion Analysis Procedure on page 36 of this manual to measure the combustion.
- Page 40 Revision Notes:...