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  4. 151 - 801
  5. Service Manual

Lochinvar 151 - 801 Service Manual

Other manuals for 151 - 801: Operation Manual
Manual is about: Armor Outdoor Armor Water Heater

Summary of 151 - 801

  • Page 1

    Outdoor armor service manual models: 151 - 801 this manual must only be used by a qualified heating installer / service technician. Read all instructions, including this manual and the outdoor armor water heater installation and operation manual, before installing. Perform steps in the order given. ...

  • Page 2: Hazard Definitions

    2 hazard definitions the following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or to important information concerning the life of the product.  danger  warning  caution caution notice danger indicates an imminently hazardous s...

  • Page 3

    Outdoor armor water heater service manual please read before proceeding installer – read all instructions, including this manual and the outdoor armor water heater installation and operation manual, before installing. Perform steps in the order given. Have this water heater serviced/inspected by a q...

  • Page 4: What Is In This Manual?

    4 what is in this manual? Service the outdoor armor water heater display • display panel readout, buttons and their functions control module inputs • control module inputs and options control module outputs • control module outputs and options general • how the water heater operates • how the contro...

  • Page 5: Service

    1 service 5 the outdoor armor water heater display 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 outdoor a...

  • Page 6: Service

    1 service 6 control inputs outdoor armor water heater service manual gas pressure switch dhw thermostat flow switch tank sensor sequencer / building management system low voltage connection board inlet temperature sensor outlet temperature sensor flue gas sensor louver proving switch flame sensor lo...

  • Page 7: Smart System

    7 low voltage connection board smart system control board alarm bell run time contacts sequencer / building management system water heater pump ignitor blower gas valve display panel pc interface building recirculation pump control outputs 1 service (continued) outdoor armor water heater service man...

  • Page 8: Service

    1 service 8 general operation how the water heater operates the outdoor 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...

  • Page 9: Service

    9 table 1a sequence of operation 1 service (continued) 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, a...

  • Page 10: Service

    1 service 10 display panel menu access table 1b use this procedure to access menus from the display panel button screen status operation display [shdn] press the right select soft key [shdn]. [yes] press the left select soft key [yes]. [menu] press and hold the left select soft key [menu] for five (...

  • Page 11: Service

    11 display panel parameter access table 1c this is a typical example of accessing a parameter, shown for parameter dhw settings, tank min setpt 1 service (continued) button screen status operation display this example shows how to access parameter temperature settings. The first display shown is at ...

  • Page 12: Service

    1 service 12 parameter table table 1d this table lists smart system control module parameters and where to access them menu description see page user access installer access display modify display modify time and date 14 yes yes yes yes software version (read only) 14 no no yes no temperature units ...

  • Page 13: Service

    1 service (continued) menu description see page user access installer access display modify display modify bms tstat input 16 no no yes yes bms 16 no no yes yes modbus 16 no no yes yes modbus t/o 16 no no yes yes cascade address 16 no no yes yes cascade type 16 no no yes yes max cascade set point 17...

  • Page 14: Service

    1 service 14 viewable and changeable control parameters caution before changing parameters, note the settings so that the unit can be returned to its original operating parameters. General time and date the control uses an internal clock for the night setback feature and for logging of events. For t...

  • Page 15: Service

    1 service (continued) 15 tank minimum set point this setting controls the minimum tank set point for the tank temperature. The installer can adjust this by accessing the tank minimum set point parameter. The minimum setting is 60°f (16°c) and the maximum setting is the maximum tank set point (tank m...

  • Page 16: Service

    16 1 service control modes bms thermostat input when controlling the water heater through the 0 - 10v bms input or through modbus, the water heater can be enabled one of two ways. With the bms thermostat input parameter set to active, the water heater will be enabled by closing the tank thermostat i...

  • Page 17: Service

    1 service (continued) 17 maximum cascade set point this parameter determines the set point used by the individual water heaters in a cascade. When a water heater is commanded to fire by the leader water heater, it will attempt to achieve this temperature at its outlet. The leader water heater will l...

  • Page 18: Service

    1 service 18 this feature has been disabled by the manufacturer. To enable this feature change the service notification in months parameter to the desired time range. Service notification running time when the water heater control determines that a scheduled service is due based on the hours of actu...

  • Page 19: Maintenance

    2 maintenance 19 maintenance and annual startup table 2a service and maintenance schedules service technician (see the following pages for instructions) general: • address reported problems • inspect interior; clean and vacuum if necessary; • clean condensate trap and fill with fresh water • check f...

  • Page 20: Maintenance

    2 maintenance 20 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 ...

  • Page 21: Maintenance

    2 maintenance (continued) 21 flue vent system and air piping 1. Visually inspect the entire flue gas venting system and air piping for blockage, deterioration or leakage. Repair any joints that show signs of leakage. Verify that air inlet pipe inside the appliance is connected and properly sealed. 2...

  • Page 22: Maintenance

    2 maintenance 22 2 maintenance inspect ignition and flame sense electrodes 1. Remove the ignition and flame sense electrodes from the water heater heat exchanger access cover. 2. Remove any deposits accumulated on the ignition/ flame sense electrode using sandpaper. If the electrodes cannot be clean...

  • Page 23: Maintenance

    2 maintenance (continued) check delta t 1. Check the delta t using table 2c as a reference. Water heater pump applications model *pipe size armstrong grundfos flow rate (gpm) loss (ft/hd) temp. Rise 151 1-1/4" e8 -- 16 16.6 18°f 200 1-1/4" e8 -- 21 11.8 18°f 286 2" e17 -- 30 17.1 18°f 400 2" e24 -- ...

  • Page 24: Troubleshooting

    3 troubleshooting 24 label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Always disconnect power to the water heater before servicing. Failure to comply could result in severe personal injury, death, or substantial property damage...

  • Page 25: Troubleshooting

    25 3 troubleshooting (continued) table 3a troubleshooting chart - no display fault cause corrective action no display - no 120 vac supplied to unit. • check external line switch, fuse, or breaker. • check position of on/off switch. Turn switch to the on position. • check 120 vac through the on/off s...

  • Page 26: Troubleshooting

    26 3 troubleshooting table 3b - inlet system sensor resistance vs. Temperature temperature °f resistance temperature °f resistance 50 18,780 158 1,990 68 12,263 176 1,458 86 8,194 194 1,084 104 5,592 212 817 122 3,893 -- -- 140 2,760 -- -- checking temperature sensors the water heater temperature se...

  • Page 27: Troubleshooting

    3 troubleshooting (continued) 27 table 3e troubleshooting chart - noisy system fault cause corrective action noisy operation - supply gas problem. Natural gas pressures should be between 4 inches w.C. And 14 inches w.C. Lp gas pressures should be between 8 inches w.C. And 14 inches w.C. • refer to s...

  • Page 28: Troubleshooting

    3 troubleshooting table 3f troubleshooting chart - fault messages displayed on water heater interface fault description corrective action gas pressure sw (will require a manual reset once the condition has been corrected. Press the reset button on the smart system display to reset.) either the manua...

  • Page 29: Troubleshooting

    29 3 troubleshooting (continued) table 3f (continued from previous page) troubleshooting chart - fault messages displayed on water heater interface fault description corrective action anti-cycling the main control board has received a call for heat too quickly after the previous call for heat has en...

  • Page 30: Troubleshooting

    30 3 troubleshooting table 3f (continued from previous page) troubleshooting chart - fault messages displayed on water heater interface fault description corrective action no flame running (will require a manual reset once the condition has been corrected. Press the reset button on the smart system ...

  • Page 31: Troubleshooting

    3 troubleshooting (continued) table 3f (continued from previous page) troubleshooting chart - fault messages displayed on water heater interface fault description corrective action flame sequence (will require a manual reset once the condition has been corrected. Press the reset button on the smart ...

  • Page 32: Troubleshooting

    3 troubleshooting 32 table 3f (continued from previous page) troubleshooting chart - fault messages displayed on water heater interface fault description corrective action fan low or fan speed low (will require a manual reset once the condition has been corrected. Press the reset button on the smart...

  • Page 33: Troubleshooting

    33 3 troubleshooting (continued) table 3f (continued from previous page) troubleshooting chart - fault messages displayed on water heater interface fault description corrective action sensor shorted (will require a manual reset once the condition has been corrected. Press the reset button on the sma...

  • Page 34: Troubleshooting

    3 troubleshooting 34 table 3f (continued from previous page) troubleshooting chart - fault messages displayed on water heater interface fault description corrective action outlet temp high outlet water temperature has exceeded the maximum outlet water temperature. • verify that the system is full of...

  • Page 35: Troubleshooting

    35 3 troubleshooting (continued) table 3f (continued from previous page) troubleshooting chart - fault messages displayed on water heater interface fault description corrective action low 24 vac 120 vac input to the main control board has dropped below 80 vac. • check 120 vac supply to the transform...

  • Page 36: Troubleshooting

    3 troubleshooting 36 combustion analysis procedure 1. Turn the main power off to the water heater by placing the “on/off” switch in the off position. 2. Turn the main power on to the water heater by placing the “on/off” switch in the on position. 3. Place the water heater into the active position by...

  • Page 37: Troubleshooting

    37 3 troubleshooting (continued) gas valve adjustment procedure if adjustment of the gas valve is deemed necessary, use the following procedures: (note: the procedures in this section are model specific.) models 151 - 286 locate the throttle adjustment screw on the side of the venturi valve (fig. 3-...

  • Page 38: Troubleshooting

    38 model 501 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 2 levels or a 1/4 turn clockwise to decrease co 2 levels. After one adjustment on the valve, follow the combustion analysis procedur...

  • Page 39: Notes

    Notes 39.

  • Page 40

    Arm-ser-01 cp-2m-01/06 revision notes: revision a (eco #c10942) initial release. Revision b (eco #c14411) reflects condensate trap changes (r6594). On page 20. Revision c (eco #c15251) reflects the addition of the burner door temperature switch (r6322) on pages 6 and 28. Oaw-ser rev c 06/14.