Lochinvar 400-801 Manuel d'utilisateur

Service ManualModels: 400 - 801 This manual must only be used by a qualified heating installer / service technician. Read all instructions, includi

1 Service101 Service General OperationHow the boiler operatesThe Knight XL uses an advanced stainless steel heat exchanger and an electronic control

1 Service1 Service (continued)Table 1-1 Sequence of OperationOPERATION DISPLAY1. Upon a call for heat, the gas pressure switch(es) must be closed.

1 Service121 Service Table 1-1 (continued from previous page) Sequence of OperationOPERATION DISPLAY8. If the space heating call for heat is active

1 Service131 Service (continued)Display panel menu accessTable 1-2 Use this procedure to access menus from the display panelBUTTONSCREEN STATUSOPERA

1 Service141 Service Display panel parameter accessTable 1-3 This is a typical example of accessing a parameter, shown for parameter Temperature Set

1 Service151 Service (continued)Parameter tableTable 1-4 This table lists SMART SYSTEM control module parameters and where to access them

1 Service161 Service Parameter table Service ManualTable 1-4 (continued from previous page) This table lists SMART S

1 Service (continued)17Parameter table Table 1-4 (continued from previous page) This table lists SMART SYSTEM control module parameters and where to

181 ServiceViewable and changeable control parameters Service ManualGeneralTime and Date The control uses an internal c

191 Service (continued) Service Manual3-Way Valve TimeThe optional Lochinvar Multi-Temperature Loop Control Board (MTLC

2Hazard definitionsThe following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or

201 Service Service ManualFreeze Protection Burner DifferentialOnce the burner has started firing due to a low inlet te

1 Service (continued) Service ManualSET POINT ATLOW OUTDOORTEMPERATURE(SH)SET POINTSET POINT ATHIGH OUTDOORTEMPERATUREL

1 Service Service ManualBoost Time The boost time parameter sets the amount of time that must elapse with a SH demand b

1 Service (continued) Service ManualBMSThe set point or modulation of the boiler may be controlled through the 0 - 10V

241 Service Service ManualThe other Cascade divider method is Efficiency Optimization, designated as EFF in the menu.

251 Service (continued) Service ManualDHW Blocks Sys PumpWhen the indirect DHW tank is connected as a zone on the prima

261 Service Service ManualService Name and Phone NumberWhen a Maintenance Reminder timer or counter has expired, a Main

2 Maintenance27Maintenance and annual startupTable 2-1 Service and Maintenance SchedulesService technician(see the following pages for instructions)G

2 Maintenance28Follow the Service and maintenance procedures given throughout this manual and in component literature shipped with the boiler. Fail

2 Maintenance (continued) 29Flue vent system and air piping1. Visually inspect the entire flue gas venting system and air piping for blockage, deter

Service Manual Please read before proceedingInstaller – Read all instructions, including this manual and the

2 Maintenance30Inspect ignition and flame sense electrodes1. Remove the ignition and flame sense electrodes from the boiler heat exchanger access co

2 Maintenance (continued) 31Check flame signal1. At high fire the flame signal shown on the display should be at least 10 microamps.2. A lower flam

2 Maintenance 32 Service ManualTest low water flow conditions NOTICEThis test is to be carried out once the Knight XL b

3 Troubleshooting33Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Always d

3 Troubleshooting 34Table 3-1 Troubleshooting Chart - No Display Service ManualFAULT CAUSE CORRECTIVE ACTIONNo Display-

3 Troubleshooting (continued)35Table 3-2A - Inlet Water/System Sensor Resistance vs. TemperatureTemperature Resistance Temperature Resistance50 18,78

3 Troubleshooting 36Table 3-3 Troubleshooting Chart - Noisy SystemFAULT CAUSE CORRECTIVE ACTIONNoisy Operation- Supply gas problem. Natural gas p

3 Troubleshooting (continued)37Table 3-4 Troubleshooting Chart - Fault Messages Displayed on Boiler Interface Service M

3 Troubleshooting 38Table 3-4 (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface

3 Troubleshooting (continued)39Table 3-4 (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface

4Please read before proceedingWhen servicing boiler –• To avoid electric shock, disconnect electrical supply before performing maintenance.• To avoi

3 Troubleshooting 40Table 3-4 (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface

3 Troubleshooting (continued)41Table 3-4 (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface

3 Troubleshooting 42Table 3-4 (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface

3 Troubleshooting (continued) 43Table 3-4 (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface FAULT D

3 Troubleshooting44Table 3-4 (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface FAULT DESCRIPTION CO

3 Troubleshooting (continued) 45Table 3-4 (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface FAULT D

3 Troubleshooting46 Service ManualCombustion Analysis Procedure1. Turn the main power off to the boiler by placing the

473 Troubleshooting (continued)Gas valve adjustment procedureIf adjustment of the gas valve is deemed necessary, use the following procedures: (Note:

Revision Notes: Revision A (ECO #C05747) initial release. Reflects the new model numbers for the Knight XL upgrade.Revision B (ECO #C06234) reflects

5What is in this manual?ServiceNear boiler piping• Typical system componentsThe Knight XL display• Display panel readout, buttons and their functionsC

1 Service6Y-S T R A IN E R(RECOMMENDED)BOILER PUMP INDIRECT DOMESTICHOT WATER TANKSYSTEM PUMPTO FLOOR DRAIN TOFROMFROMSYSTEMTOSYSTEMDOMESTIC HO

71 Service (continued)NAVIGATION DIALThe Knight XL displayThe information on the bottom of the display shows the functions of the two SELECT keys (on

1 Service81 Service GAS PRESSURE SWITCHDHW THERMOSTATROOM THERMOSTAT /ZONE CONTROLFLOW SWITCHSYSTEM SENSOROUTDOOR SENSORSEQUENCER / BUILDINGMANAGMEN

1 Service91 Service (continued)LOW VOLTAGE CONNECTIONBOARDSMART CONTROLMODULEALARM BELLLOUVER RELAYRUN TIME CONTACTSBUILDING MANAGEMENT SYSTEMBOILER