Lochinvar Knight 151 - 211 Service Manual Download Page 1 | Manualshive

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Service Manual

Models: 51 - 211

This manual must only be
used by a qualified heating
installer / service technician.
Read all instructions,
including this manual and the
Knight Wall Mount
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.



WARNING

Save this manual for future reference.

WBII-SER Rev B

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Summary of Contents for Knight 151 - 211

Page 1: ...Read all instructions including this manual and the Knight Wall Mount Installation and Operation Manual before installing Perform steps in the order given Failure to comply could result in severe per...

Page 2: ...t not related to personal injury or property damage CONTENTS 2 Hazard Definitions 2 PLEASE READ BEFORE PROCEEDING 3 Handling Ceramic Fiber Materials 3 When servicing boiler 4 Boiler operation 4 Boiler...

Page 3: ...Cancer IARC has concluded Crystalline silica in the form of quartz or cristobalite from occupational sources is carcinogenic to humans Group 1 Normal operating temperatures in this appliance are below...

Page 4: ...ve sediment The high efficiency heat exchanger can be damaged by build up or corrosion due to sediment Do not use petroleum based cleaning or sealing compounds in the boiler system Gaskets and seals i...

Page 5: ...l mount boiler operation A General B Temperature Setting C Data Logging D Functions E DHW Settings F Outdoor Reset G Anti cycling H Control Modes I Circulation Pumps J Building Management System BMS K...

Page 6: ...T WATER TANK TO FLOOR DRAIN AIR SEPARATOR EXPANSION TANK SYSTEM SENSOR Near boiler piping This piping reference is included to specify the Near Boiler Piping specific to the Knight wall mount boiler T...

Page 7: ...IAL The Knight wall mount 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 SE...

Page 8: ...TEM SENSOR OUTDOOR SENSOR BUILDING MANAGEMENT SYSTEM LOW VOLTAGE CONNECTION BOARD INLET TEMPERATURE SENSOR OUTLET TEMPERATURE HIGH LIMIT SENSOR FLUE GAS SENSOR FLAME SENSOR LOW WATER CUTOFF BLOCKED DR...

Page 9: ...e continued LOW VOLTAGE CONNECTION BOARD SMART CONTROL MODULE ALARM BELL AUX DEVICE RELAY RUN TIME CONTACTS BUILDING MANAGEMENT SYSTEM BOILER PUMP SYSTEM PUMP DHW PUMP IGNITOR BLOWER GAS VALVE DISPLAY...

Page 10: ...r return water temperature or system supply temperature depending on the parameter setting Sequence of operation Table 1 1 shows control module normal sequences of operation for space heating and DHW...

Page 11: ...itch must close 4 The control starts a 15 second prepurge cycle by initiating the blower 5 The control starts a 4 second trial for ignition by firing the spark electrode and opening the gas valve 6 If...

Page 12: ...ill then modulate to maintain the outlet 9 If the boiler is not part of a Cascade and both the space heating and DHW calls for heat remain active long enough the boiler will switch back and forth betw...

Page 13: ...the LEFT SELECT soft key 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 NAVIGAT...

Page 14: ...of the menu listings after entering the installer access code Rotate the NAVIGATION dial counterclockwise until the arrow is next to TEMPERATURE SETTINGS Press the NAVIGATION dial one time Rotate the...

Page 15: ...Times 19 No No Yes Yes 10 Display Timeout 20 No No Yes Yes B 1 SH1 Set Point 20 Yes Yes No No 2 Minimum SH Set Point 20 No No Yes Yes 3 Maximum SH Set Point 20 No No Yes Yes 4 SH1 Offset Set Point 20...

Page 16: ...ing for Indirect DHW Tank 21 No No Yes Yes F 1 Low Outdoor Temperature 22 No No Yes Yes 2 High Outdoor Temperature 22 No No Yes Yes 3 SH1 Set Point at Low Outdoor Temp 22 No No Yes Yes 4 SH1 Set Point...

Page 17: ...7 Cascade Type L L EFF 25 No No Yes Yes 8 Max Cascade Outlet Set Point 25 No No Yes Yes 9 Cascade Offset 25 No No Yes Yes 10 Cascade Off On Differential 25 No No Yes Yes 11 Min On Off Time 25 No No Ye...

Page 18: ...No No Yes Yes 7 Set Point at Max Volts 27 No No Yes Yes 8 On Volts 27 No No Yes Yes 9 Off Differential Volts 27 No No Yes Yes K 1 Service Notification Months 27 No No Yes Yes 2 Service Notification R...

Page 19: ...ating and DHW night setback features Both may be set to any time within a 7 day week These settings are referred to as triggers Multiple start or stop triggers may be set within a single day if desire...

Page 20: ...er turns back off The installer can adjust this differential by accessing parameter D4 The minimum setting is 0 F and the maximum is 20 F The default setting is 5 F 2 8 C Display Timeout This is the t...

Page 21: ...to the DHW demand The installer can adjust the length of time the boiler will service the space heating demand by accessing parameter E6 The minimum setting is 0 minutes and the maximum setting is 200...

Page 22: ...lue is 70 F 21 C SH1 SH3 Set Point at Low Outdoor Temperature When the outdoor air temperature drops below this point the water temperature will be at this setting FIG 1 1 However if the user set poin...

Page 23: ...temperature range of this parameter is 0 F 0 C to 90 F 50 C The default value is 10 F 6 C Shift Reset Curve SH1 SH3 There is a shift reset curve for each outdoor reset The shift reset curve parameter...

Page 24: ...put in the case of 0 10V BMS control or the 0 10V input value received through ModBus The default value is INACTIVE Figure 1 2 Ramp Delay Interval When finished the installer can press the RIGHT SELEC...

Page 25: ...the first boiler reaches a certain rate default 90 it lowers its rate to 45 and turns on the next boiler at 45 The two 2 boilers then modulate at the same rate As the calculated load increases furthe...

Page 26: ...imum is 100 The default value is 100 I Circulation pumps System Pump Delay The system pump delay parameter sets the length of time the system pump if connected will run after a SH demand has been sati...

Page 27: ...adjustable by the installer by accessing parameter K2 The time range for this parameter is 0 hours to 100 000 hours The default time is 8 760 hours Service Notification Cycles When the boiler control...

Page 28: ...t Installation and Operation Manual Flame inspection stable uniform Flame signal at least 10 microamps at high fire Clean the heat exchanger if flue temperature is more than 54 F above return water te...

Page 29: ...1 of the Knight Wall Mount Installation and Operation Manual If any of these are present in the boiler intake air vicinity they must be removed If they cannot be removed reinstall the air and vent lin...

Page 30: ...night Wall Mount Installation and Operation Manual before proceeding further Safety relief valves should be re inspected AT LEAST ONCE EVERY THREE YEARS by a licensed plumbing contractor or authorized...

Page 31: ...edures 2 Check settings of external limit controls if any and adjust if necessary Perform start up and checks 1 Start boiler and perform checks and tests specified in Section 10 Start up of the Knight...

Page 32: ...hanger Cleaning Kits Model Kit Number Part Number Component Description 51 106 KIT30062 CTN20005 Rear Refractory Cover MSC20083 Nylon 4 Wheel Brush MSC20085 1 4 x 12 Drill Extension 151 211 KIT30063 C...

Page 33: ...lockup or with boiler on Minimum 4 inches w c natural 8 inches w c LP with gas flowing verify during boiler startup Check control module fuses ALWAYS check control module fuses before replacing contro...

Page 34: ...e thermostat satisfied Review remote thermostat setting Outside air temperature above Warm Weather Shutdown WWSD set point for main control board Check location of outside air sensor Check resistance...

Page 35: ...mportant 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 referen...

Page 36: ...Clean or replace the burner as necessary Low water flow through the heat exchanger Refer to Section 6 Hydronic Piping of the Knight Wall Mount Boiler Installation and Operation Manual for minimum flow...

Page 37: ...k for loose or misplaced jumpers if flow switch or LWCO is not installed Blown fuse Replace fuse F3 on the control board see page 33 of this manual Blocked Drain SW will require a manual reset once co...

Page 38: ...ly Verify that the plastic hose from the gas valve to the air inlet is connected and is not damaged Verify that the vent air intake pipes are correctly installed and that there are no obstructions Che...

Page 39: ...voltage is not present check wiring back to the main control board Replace the main control board if necessary If 120 vac is present on a call for heat and the boiler pump is not operating replace the...

Page 40: ...in control board Replace the fan Replace the main control board Sensor Open will require a manual reset once the condition has been corrected Press the RESET button on the SMART SYSTEM display to rese...

Page 41: ...Manual for the proper piping methods for the Knight wall mount boiler Check for 120 vac to the boiler pump motor on a call for heat If voltage is not present check the wiring back to the main control...

Page 42: ...rs from a laptop the main control board must be reset Press the ENTER RESET button on the SMART SYSTEM display panel Service Blk While the unit is in Service Mode the outlet temperature has exceeded 1...

Page 43: ...ections at the low voltage terminal strip Check the wire size length to remote devices Replace the transformer Watch Dog Error The main control board has detected an internal fault Replace the main co...

Page 44: ...CTION Vent Air Intake Length or Obstruction Refer to Section 3 General Venting of the Knight Wall Mount Installation and Operation Manual for the proper venting and air intake methods for the Knight w...

Page 45: ...1 4 turn counterclockwise to decrease CO2 levels After performing one adjustment on the valve follow the Combustion Analysis Procedure on page 44 of this manual to measure the combustion If combustion...

Page 46: ...46 NOTES...

Page 47: ...47 NOTES...

Page 48: ...otes Revision A ECO C05747 initial release Reflects the new model numbers for the Knight Wall Mount upgrade Revision B ECO C06234 reflects changes made to the Service Notification parameter WBII SER R...

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