Lochinvar 495 manuals
Household Appliance > Water Heater
When we buy new device such as Lochinvar 495 we often through away most of the documentation but the warranty.
Very often issues with Lochinvar 495 begin only after the warranty period ends and you may want to find how to repair it or just do some service work.
Even oftener it is hard to remember what does each function in Water Heater Lochinvar 495 is responsible for and what options to choose for expected result.
Fortunately you can find all manuals for Water Heater on our side using links below.
Lochinvar 495 Service Manual
52 pages 3.29 Mb
INSTALLATION AND SERVICE MANUALSave this manual for future reference. HYDRONIC HEATING BOILERS and DOMESTIC WATER HEATERS 495,000 - 2,065,000 Btu/hr MODELS 3 GENERAL PRODUCT INFORMATIONSpecial Instructions Unpacking Codes Warranty SAFETY INFORMATION6 LOCATING UNITClearances from Combustible Construction Base for Combustible Floors FREEZE PROTECTION Pump Operation Location 7 Hydronic System Antifreeze Outdoor Boiler Installation Shut-Down and Draining495,000 CFK3302 645,000 CFK3303 745,000 CFK3304 TABLE - A COMBUSTIBLE FLOOR KITS Input Btu/hr Kit Number Freeze Protection for a Heating Boiler System (if required) 8 COMBUSTION AND VENTILATION AIR Combustion Air Filter Installing Combustion Air Filter Combustion Air Options 9 10 VENTINGGeneral Information Venting SupportVertical Vent Termination Clearances and Location 11 14 16 CONNECTING TO GAS SUPPLYGas Pressure Test Gas Piping Connecting Gas Piping to Unit 17 19 Gas Manifold Pressure Adjustment 20 CONNECTING TO WATER SUPPLYInlet and Outlet Connections TABLE - I NET MANIFOLD PRESSURE Regulator Pressure Less Front Chamber Pressure Relief Valve Water Flow Switch Low Water Cutoff 21 CONNECTING TO ELECTRICAL SUPPLY 36 DOMESTIC WATER HEATERSWater Velocity Control Required Temperature Rise TABLE - Q Temperature Rise Chart 37 Water ChemistryCirculating Pump495,000 - 745,000 985,000 - 2,065,000 TABLE - R Pipe Sizing Chart 38 DOMESTIC WATER HEATERS Minimum Pump Performance Heat Exchanger Potable Hot Water Temperature Control Settings Domestic Water Temperatures TABLE - S Minimum Pump Performance 39 Location of Cold Water Supply Piping Connections High Water Temperature Limit Control Optional Relief Valve Thermal Expansion Cathodic Protection 40 MAINTENANCEAppliance Area Water Circulating Pump Burner Flames Flue Gas Passageways Cleaning ProceduresBurner Removal and Cleaning 41 Heat Exchanger CleaningElectrical Combustion and Ventilation AirCombustion Air Filter (Models 985,000 - 2,065,000 Btu/hr Only) Air Flow Combustion Air Fan Fan Cleaning Combustion Air Fan Adjustment Adjusting Differential Air Pressure 42 MAINTENANCE Servicing Hot Surface Igniter and Ignition Module 43 44 MAINTENANCE Ignition System Checkout SEQUENCE OF OPERATION 45 GLOSSARYPower Supply ON/OFF Rocker Switch Low Voltage Supply Transformer 24VAC Circuit Breaker Manual Reset High-Limit Thermostat EMS/Sequencer/Remote Aquastat Terminals Safety Device Terminals 46 Electronic Temperature ControllerIgnition Module Tw o Speed Blower Pressur e Switch Prepur ge T rial for Ignition Igniter R elay Boar d Ignition Heat T r ansf er Pr ocess P ost-Pur ge Pump Delay Idle 47 SCHEMATIC DIAGRAM MODELS 495,000 - 745,000 BTU/HR- DISCONNECT POWER BEFORE SERVICING THE UNIT 48 WIRING DIAGRAMS - MAIN UNIT CONNECTIONS MODELS 495,000 - 745,000 BTU/HRHI-LIMIT OPTION BOX "C" IGNITION MODULE CONTROL PANE DISCONNECT POWER BEFORE SERVICING THE UNIT HI-LIMITS - PWR SWBK/W POWER SWITCH 120 VAC TRIAL 24 VAC HEATING 24VAC FLAME FAILURE Y AUX HI-LIMIT INLET SENSOR G HLOW GAS HIGH GAS WHEN REPLACING DAMAGED WIRING, USE EQUIVALENT TYPE AND GAUGE.1 2 SHUTOFF VALVE NORMALLY OPEN VENT VALVE OPTIONAL D TERMINAL STRIP - SENSORPUMP DELAY RELAY "24VDC"COIL DEF B CF2 GY/W PR/W IGNITION MODULE BL/W PR/W BL/W B C 49 WIRING DIAGRAMS - MAIN UNIT CONNECTIONS MODELS 495,000 - 745,000 BTU/HR (CONTINUED)SPLICE ` OPTIONAL OPERATORRO BL CN2 CN1 OPTION BOX "B" WIRING CONNECTIONS DIAGRAM MAIN UNIT - GAS VALVES - BLOWER PRESSURE SWITCH NEL24 VAC OPTION BOX "A" LBL20007 REV A GHOT SURFACE IGNITER BL BURNER GROUND G T R/O AIR PRESSURE SWITCH E120VA C PUMP 120VAC SUPPLY BLOWER LOW AIR INDICATOR BR GR VALVE #2 CHASSIS GROUND ~~~~ ~~~~ COPERATORCN3 CN4 CN5 CN6 CN7 CN8 CN9 R/O OBK A~~~~STAGE #2HL BLANK COVER GROUND CHASSIS 60Hz 15AMPS 120 VACCN7 TATTEMPTING TO SERVICE THIS EQUIPMENT. ENSURE ALL BRANCH CIRCUITS ARE DE MORE BRANCH CIRCUITS. TO PREVENT ELECTRICAL SHOCK, NOTES: 2-STAGE THERMOSTATI/O RESET OPTIONAL EXAMPLE DEVICES: O 2 1 G CN9 OPERATOR STAGE #1SETPOINT DIFFERENTIAL HIGH-FIRE -- WARNING:CN6 CN5 CN4 CN2 CN3 BL -ON/OFF Line 24 VAC 120 VAC POWER SWITCH BK T/ W O + OFFSET W 2 3 4 P OFF BOARD BOILER ONLY O/BK LBL20014 REV- AO.A. SENSOR CONNECTS HERETHIS HEATER MAY BE CONNECTED TO ONE OR -ENERGIZED BEFORE PROVIDED IF NO I/O RESET OPTION IS PROVIDED 50 SCHEMATIC AND WIRING DIAGRAM MODELS 985,000 - 2,065,000 BTU/HR51 WIRING DIAGRAM - CONTROL BOX CONNECTIONS MODELS 985,000 - 2,065,000 BTU/HRCONNECTED UNLESS 8 BOILER ONLY I/O RESET BOARD 3 1 5 FLAME FAIL ENABLE RELAY BOARD DISPLAY 24VAC XFMR.FLAME PUMP O OPTIONAL 2 4 3 2 CN9 CN8 CN7 CN5 CN4 CN2 CN3 OPERATOR CONNECTION DIAGRAM A B1 2 3 4 CONTROL BOX CONNECTIONSLINE IGNITION -3 F2S2/FS OPTIONAL ALARM ENABLE RELAY BK W -+ MODULETH PI 24COM RESET 24VAC MV PS FF OPTIONAL TO LWCO LBL20015 REV A AE DAC POWER WIRING BOX MAIN UNIT CONNECTOR IGNITER CONNECTOR CN6 2-STAGE THERMOSTAT SENSOR CIRCUIT BREAKER FAIL RESET #2 FULL-FIRE/ BLOWER RELAY SOCKET TOP VIEW 120V 24V CBL 6 9 12 10 7 311 1 14 13 15 ELECTRONIC CONTROLLER F F
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