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Lochinvar 51-211 - page 1
User’s Information Manual Models: 51 - 211 If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life. This appliance MUST NOT be installed in any location where gasoline or flammable vapors are likely to be present. WHAT TO DO IF YOU SMELL GAS • Do not try ...
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Lochinvar 51-211 - page 2
2 Hazard definitions The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk level s or to important information concerning the life of the product. DANGER WARNING CAUTION CAUTION NOTICE DANGER indicates an imminently hazardous situation which, if not avoided, will result ...
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Lochinvar 51-211 - page 3
User’s Information Manual Please read before proceeding The Knight Wall Mount Installation and Operation Manual along with the Knight Wall Mount Service Manual are for use only by a qualified heating installer/service technician. Refer only to this User’s Information Manual for your reference. Improper installation, adjustment, alteration, serv ...
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Lochinvar 51-211 - page 4
User’s Information Manual 1 Prevent combustion air contamination 4 If the boiler combustion air inlet is located in a laundry room or pool facility, for example, these areas will always contain hazardous contaminants. To prevent the potential of severe personal injury or death, check for areas and products listed in Table 1A before installing the ...
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Lochinvar 51-211 - page 5
User’s Information Manual 2 Maintenance schedule 5 Service technician (see the Knight Wall Mount Service Manual) General: • Reported problems • Inspect interior; clean and vacuum if necessary • Clean condensate trap and fill with fresh water • Check for leaks (water, gas, flue, condensate) • Verify flue and air lines in good condition a ...
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Lochinvar 51-211 - page 6
User’s Information Manual 2 Maintenance schedule 6 Maintenance procedures Boiler must be serviced and maintained WARNING The boiler must be inspected and started annually at the beginning of the heating season by a qualified service technician. In addition, the maintenance and care of the boiler designated on page 5 of this manual and explain ...
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Lochinvar 51-211 - page 7
User’s Information Manual 2 Maintenance schedule (continued) 7 4. Fill with fresh water until the water begins to pour out of the drain. 5. Replace the cap. Press the cap onto the trap until the cap makes contact with the drain. 6. Replace the retaining screw. WARNING The condensate trap (FIG. 2-1) must be filled with water during all times o ...
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Lochinvar 51-211 - page 8
User’s Information Manual 2 Maintenance schedule 8 WARNING Have leaks fixed at once by a qualified service technician. Failure to comply could result in severe personal injury, death, or substantial property damage. Operate relief valve 1. Before proceeding, verify that the relief valve outlet has been piped to a safe place of discharge, avoi ...
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Lochinvar 51-211 - page 9
User’s Information Manual 9 3 Operating instructions o C ...
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Lochinvar 51-211 - page 10
User’s Information Manual 10 4 SMART SYSTEM control module Figure 4-1 Control Panel Knight wall mount control module Use the control panel (FIG. 4-1) to set temperatures, operating conditions, and monitor boiler operation. NA VIGA TION DIAL The information on the bottom of the display shows the functions of the two SELECT keys (on either corner), ...
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Lochinvar 51-211 - page 11
User’s Information Manual 11 4 SMART SYSTEM control module (continued) Temperature Units The control can be configured to display temperature in either °F or °C. This parameter can be changed by the user or the installer by accessing the Temperature Units parameter . The default is °F. To change the temperature units, access the clock menu as ...
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Lochinvar 51-211 - page 12
User’s Information Manual 12 4 SMART SYSTEM control module Status Display Screens Section Display Description A (Boiler Status Bar) STANDBY The unit has not received a call for heat from a remote thermostat nor has it received a call for heat from a DHW thermostat. START The unit has begun a burn cycle and is checking all safety circuits. PREPURG ...
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Lochinvar 51-211 - page 13
User’s Information Manual 13 4 SMART SYSTEM control module (continued) Status Display Screens (cont’d) Section Display Description C (Operational Information) SYSTEM: The temperature read by the system supply sensor (if connected). TANK: The temperature read by the tank sensor (if connected). OUTDOOR: The temperature read by the outdoor sensor ...
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Lochinvar 51-211 - page 14
User’s Information Manual 14 4 SMART SYSTEM control module Status Display Screens (cont’d) Section Display Description E (NAVIGATION Dial Function) Turning the NAVIGATION dial will select the next or previous Status Screen. Pressing the NAVIGATION dial will show the next fault, NSB (Night Setback) trigger, or ramp delay setting. Pressing the NA ...
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Lochinvar 51-211 - page 15
15 Notes User’s Information Manual ...
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Lochinvar 51-211 - page 16
Revision Notes: Revision A (ECO C05747) initial release. Reflects the new model numbers for the Knight Wall Mount upgrade. Revision B (ECO C07072) reflects the change in design of the manual air vent, the update of FIG. 2-3 on page 8, and the reorganization of the information on pages 10 and 11 for the user password information. WBII-USER Rev B 01/ ...
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