Lochinvar 51-211 manual

WBII-I-O Rev I Installation & Operation 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 Service Manual, before installing. Perform steps in the order given. Failure to comply could result in severe personal injury,[...]

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 situation which, if not avoided, will result [...]

Installation & Operation Manual Please read before proceeding Installer – Read all instructions, including this manual and the Knight Wall Mount Service Manual, before installing. Perform steps in the order given. User – This manual is for use only by a qualified heating installer/ service technician. Refer to the User’s Information Manua[...]

Installation & Operation Manual 4 The Knight Wall Mount Boiler - How it works... 1. Stainless steel heat exchanger Allows system water to flow through specially designed coils for maximum heat transfer, while providing protection against flue gas corrosion. The coils are encased in a jacket that contains the combustion process. 2. Combustion ch[...]

Installation & Operation Manual 11 17 19 23 10 28 Front View 16 32 20 29 31 3 13 14 7 27 8 6 Left Side (inside unit) 2 25 24 5 4 26 22 18 1 Right Side (inside unit) The Knight Wall Mount Boiler - How it works... (continued) FRONT OF UNIT 14 13 30 21 15 22 Bottom View 5 Models 51 - 211[...]

6 Installation & Operation Manual Ratings Notes: 1. As an Energy Star Partner, Lochinvar has determined that Knight wall mount boilers meet the Energy Star guidelines for energy efficiency. 2. The ratings are based on standard test procedures prescribed by the United States Department of Energy. 3. Net AHRI ratings are based on net installed ra[...]

The Knight wall mount boiler gas manifold and controls met safe lighting and other performance criteria when the boiler underwent tests specified in ANSI Z21.13 – latest edition. Failure to keep boiler area clear and free of combustible materials, gasoline, and other flammable liquids and vapors can result in severe personal injury, death, or sub[...]

TOP 6" MI NIMUM LEFT 24" SERVICE 0" MINI MUM FRONT 24" SER VICE 6" MI NIMUM BOTTOM 24" SERVICE 0" MINIMUM 1/4" MINIMUM CLEARANC E AROUN D HOT WA TER PIPES 1" MINIMUM CLEARANCE A ROUND VENT PIP E OPEN FRONT RIGHT 0" MIN IMUM Figure 1-2 Alcove Installation - Minimum Required Clearances TOP 6" MIN[...]

Provide air openings to room: Knight wall mount boiler alone in boiler room 1. No air ventilation openings into the boiler room are needed when clearances around the Knight wall mount boiler are at least equal to the SERVICE clearances shown in FIG.’s 1-1 and 1-2. For spaces that do NOT supply this clearance, provide two openings as shown in FIG.[...]

Products to avoid: Spray cans containing chloro/fluorocarbons Permanent wave solutions Chlorinated waxes/cleaners Chlorine-based swimming pool chemicals Calcium chloride used for thawing Sodium chloride used for water softening Refrigerant leaks Paint or varnish removers Hydrochloric acid/muriatic acid Cements and glues Antistatic fabric softeners [...]

When removing a boiler from existing common vent system: Do not install the Knight wall mount boiler into a common vent with any other appliance. This will cause flue gas spillage or appliance malfunction, resulting in possible severe personal injury, death, or substantial property damage. Failure to follow all instructions can result in flue gas s[...]

Installation & Operation Manual 2 Prepare boiler 12 Remove boiler from wood pallet 1. After removing the outer shipping carton from the boiler, remove the parts box. 2. To remove the boiler from the pallet: a. Remove the two (2) lag bolts securing the bottom of the unit to the pallet. b. Lift the boiler off the wall bracket mounted to the palle[...]

Installation & Operation Manual 13 2 Prepare boiler (continued) F ASTENERS APPROPRIA TE FOR WALL TYPE QTY : 4 MOUNTING BRACKET (F ACTORY SUPPLIED) WALL : W OOD OR MET AL STUDS ON 16" CENTERS -OR- MASONRY / POURED CONC RETE Figure 2-4 Mounting the Boiler Figure 2-3 Installing Propane Orifice 13. Reattach the wiring connector to the gas valv[...]

3 General venting Figure 3-1 Two-Pipe Sidewall Termination - See page 22 for more details Figure 3-2 PVC/CPVC Concentric Sidewall Termination - See page 26 for more details Direct venting options - Sidewall Vent Figure 3-3 Two-Pipe Vertical Termination - See page 29 for more details Figure 3-5 Vertical Vent, Sidewall Air Direct venting options - Ve[...]

15 Installation & Operation Manual 3 General venting (continued) This appliance requires a special venting system. Use only approved stainless steel, PVC, CPVC or polypropylene pipe and fittings listed in Tables 3D, 3E, and 3G for vent pipe, and fittings. Failure to comply could result in severe personal injury, death, or substantial property d[...]

3 General venting 16 Installation & Operation Manual Requirements for installation in Canada 1. Installations must be made with a vent pipe system certified to ULC-S636. IPEX is an approved vent manufacturer in Canada supplying vent material listed to ULC-S636. 2. The first three (3) feet of plastic vent pipe from the appliance flue outlet must[...]

17 Installation & Operation Manual 3 General venting (continued) Materials Air inlet pipe materials: The air inlet pipe(s) must be sealed. Choose acceptable combustion air inlet pipe materials from the following list: PVC, CPVC, Polypropylene or ABS Dryer Vent or Sealed Flexible Duct (not recommended for rooftop air inlet) Galvanized steel vent[...]

3 General venting 18 Installation & Operation Manual 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, page 10 before installing the bo[...]

19 3 General venting (continued) Installation & Operation Manual Installing vent and air piping Use only cleaners, primers, and solvents that are approved for the materials which are joined together. NOTICE 1. Work from the boiler to vent or air termination. Do not exceed the lengths given in this manual for the air or vent piping. 2. Cut pipe [...]

20 3 General venting Installation & Operation Manual The installer must use a specific vent starter adapter at the flue collar connection. The adapter is supplied by the vent manufacturer to adapt to its vent system. See Table 3F for approved vent adapters. Discard CPVC starter piece. NOTICE All vent connections MUST be secured by the vent manu[...]

21 3 General venting (continued) Installation & Operation Manual Figure 3-9 Near Boiler Stainless Steel Venting The installer must use a specific vent starter adapter at the flue collar connection, supplied by the vent manufacturer to adapt to its vent system. See Table 3H for approved vent adapters. Discard CPVC starter piece. NOTICE Approved [...]

4 Sidewall direct venting Vent/air termination – sidewall TO BOILER INT AKE AIR CONNECTION FROM BOILER VENT PIPE CONNECTION TERMINA TION PLA TE BIRD SCREEN GRADE OR SNOW LINE 12” MIN BIRD SCREEN 12” MIN 15” MAX Figure 4-1B Alternate PVC/CPVC/ Polypropylene Sidewall Termination of Air and Vent w/Field Supplied Fittings Model Kit Number Vent [...]

4 Sidewall direct venting (continued) Vent/air termination – sidewall AL TERNATE VENTING ARRANGEMENT (IF SP ACE PERMITS) BIRD SCREEN 12” MIN 12” MIN 15” MAX COUPLING TO BOILER INT AKE AIR CONNECTION FROM BOILER VENT PIPE CONNECTION BIRD SCREEN GRADE OR SNOW LINE Figure 4-1C Alternate Venting Arrangement (if Space Allows) w/Field Supplied Fi[...]

4 Sidewall direct venting Installation & Operation Manual VENT PIPING GAL V ANIZED THIMBLE VENT CAP AIR PIPING WALL PLA TE VENT PLA TE VENT AIR CENTERLINE WIDTH Figure 4-4A PVC/CPVC Sidewall Termination Assembly Prepare wall penetrations 1. Use the factory supplied wall plate as a template to locate the vent and air intake holes and mounting ho[...]

All vent pipes and air inlets must terminate at the same height to avoid possibility of severe personal injury, death, or substantial property damage. Multiple vent/air terminations 1. When terminating multiple Knight wall mount boilers terminate each vent/air connection as described in this manual (FIG. 4-5A). 2. Place wall penetrations to obtain [...]

4 Sidewall direct venting Sidewall termination – optional concentric vent Description and usage Lochinvar offers optional concentric combustion air and vent pipe termination kits (Factory Kit #CVK3003 - 3" or #CVK3008 - 2"). Both combustion air and vent pipes must attach to the termination kit. The termination kit must terminate outside[...]

4 Sidewall direct venting (continued) Sidewall termination – optional concentric vent models Figure 4-8 Concentric Vent Dimensional Drawing Instead of cementing the smaller pipe to the rain cap, a field-supplied stainless steel screw may be used to secure the two (2) components together when field disassembly is desired for cleaning (see FIG. 4-9[...]

28 Installation & Operation Manual 4 Sidewall direct venting Sidewall termination – optional concentric vent Multiventing sidewall terminations When two (2) or more direct vent appliances are vented near each other, each appliance must be individually vented (see FIG. 4-11). NEVER common vent or breach vent this appliance. When two (2) or mor[...]

5 Vertical direct venting Vent/air termination – vertical Follow instructions below when determining vent location to avoid possibility of severe personal injury, death or substantial property damage. AL TERNA TE INT AKE LOCA TIONS: INT AKE PIPES MA Y BE LOCA TED ANYWHERE WITHIN 24” OF VENT PIPE BIRD SCREEN (TYPICAL) COUPLING (FIELD SUPPLIED) V[...]

5 Vertical direct venting Vent/air termination – vertical Multiple vent/air terminations 1. When terminating multiple Knight wall mount boilers, terminate each vent/air connection as described in this manual (FIG. 5-2). Terminate all vent pipes at the same height and all air pipes at the same height to avoid possibility of severe personal injury,[...]

5 Vertical direct venting (continued) Vertical termination – optional concentric vent Description and usage Lochinvar offers an optional concentric combustion air and vent pipe termination kit. Both combustion air and vent pipes must attach to the termination kit. The termination kit must terminate outside the structure and must be installed as s[...]

32 Installation & Operation Manual 5 Vertical direct venting Vertical termination – optional concentric vent Figure 5-6 Concentric Vent Roof Installation Ensure termination height is above the roof surface or anticipated snow level (12 inches in U.S.A. or 18 inches in Canada) as shown in FIG. 5-4, page 31. If assembly is too short to meet hei[...]

Installation & Operation Manual 5 Vertical direct venting (continued) Alternate vertical concentric venting This appliance may be installed with a concentric vent arrangement where the vent pipe is routed through an existing unused venting system; or by using the existing unused venting system as a chase for vent and combustion air routing. Con[...]

Installation & Operation Manual Figure 5-10 Existing Vent as a Chase FLUE EXHAUST AIR INLET FLUE OUTLET EX ISTING CAP SEAL SEAL 5 Vertical direct venting Existing vent as a chase Follow all existing termination and clearance requirements and allowable pipe lengths. Use only approved venting materials listed in the General Venting Section of thi[...]

Installation & Operation Manual 35 6 Hydronic piping System water piping methods The Knight wall mount is designed to function in a closed loop pressurized system not less than 12 psi. A temperature and pressure gauge is included to monitor system pressure and outlet temperature and should be located on the boiler outlet. It is important to not[...]

Installation & Operation Manual 36 6 Hydronic piping Near boiler piping components 1. Boiler system piping: Boiler system piping MUST be sized per the pipe requirements listed in Table 6A. Reducing the pipe size can restrict the flow rate through the boiler, causing inadvertent high limit shutdowns and poor system performance. Flow rates are ba[...]

Installation & Operation Manual 37 Near boiler piping connections VENT AIR Y- S T R A I N E R (RECOMMENDED) DOMESTIC HOT WATER PUMP CONDENSATE DRAIN SYSTEM PUMP BOILER PUMP F R O MS Y ST E M T O S Y S T E M TO FROM INDIRECT DOMESTIC HOT WATER T ANK TO FLOOR DRAIN AIR SEP ARA TOR EXP ANSION TANK SYSTEM SENSOR Figure 6-1A Near Boiler Piping w/Y-S[...]

Installation & Operation Manual 38 6 Hydronic piping 6 Figure 6-2 Pressure Drop vs. Flow - Models 51 - 211 20°F Temperature Rise Applications Model GPM FT/HD Minimum Pipe Size Pump Grundfos TACO B & G Armstrong 51 5.1 11 1" UPS26-99F 0011 NRF-36 E7 81 7.5 24 1" UPS26-99F 0011 NRF-36 E7 106 9.8 27 1" UPS26-99F 0013 NRF-36 E11[...]

6 Hydronic piping (continued) It is required that near boiler piping systems utilize Primary/Secondary configurations as shown in FIG.’s 6-3 through 6-10 only. The use of other near boiler piping configurations could result in improper building and system flow rates leading to inadvertent boiler high limit shutdowns and poor system performance. N[...]

40 Installation & Operation Manual BOILER INDIRE CT DHW T AN K DOM ESTIC HOT WA TER CIRCULA TOR BACKFLOW PREVENTER PRESSURE REDUCING V AL VE PRESSURE GAUGE ANTI-SCAL D MIXING V A L VE COLD WAT E R IN TEMPERA TURE / PRESSURE GAUGE AIR SEP ARA TOR EXP ANSION TA N K BALL V AL VE (TYPICAL) UNION (TYPICAL ) DRAIN DRAIN PO INT (TYPICAL) MAKE UP W A T[...]

41 Installation & Operation Manual INDIRE CT DHW T AN K BACKFLOW PREVENTER PRESSURE REDUCING V A L VE PRESSURE GAUGE ANTI-SCAL D MIXING V A L VE AIR SEP ARA TOR EXP ANSION TA N K BALL V AL VE (TYPICAL ) DRAIN P OINT (TYPICAL ) MAKE UP WAT E R ZONE CI RCULA TORS (TYPICA L) FLOW CHECK VA L V E (TYPICAL ) NOT TO EXCEED 4 PI PE DI A OR MAX. OF 12&q[...]

42 Installation & Operation Manual 6 Hydronic piping BOILER INDIRE CT DHW T ANK ANTI-SCALD MIXING VALV E COLD WATE R IN TEMPERATURE / PRESSURE GAUGE AIR SEPARATO R BALL VALVE (TYPICAL) UNION (TYPICAL) DRAIN POI NT (TYPICAL) MA KE UP WATE R HOT W ATER OUT BOILER CIRCULATOR BACKFLOW PREVENTER PRESSURE REDUCING VALV E PRESSURE GAUGE EXPAN SION TAN[...]

6 Hydronic piping (continued) DOMESTIC HOT WATER CIRCULATOR ANTI-SCALD MIXING VALVE COLD WATE R IN AIR SEPARATOR BALL VALVE (TYPICAL) DRAIN POINT (TYPICAL) MAK E UP WAT ER HOT WATE R OUT BOILER CIRCULATOR BACKFLOW PREVENTER PRESSURE REDUCING VALVE PRESSURE GAUGE EXPANSIO N TANK MIXING V ALV ES (TYPICAL) FLOW CHECK VALVE SYSTEM SUPPLY SENSOR MA Y S [...]

6 Hydronic piping Figure 6-7 Multiple Boilers - Multiple Temperatures with DHW Piped as a Zone DOMESTIC H OT W ATER CIRCULATOR ANTI-SCALD MIXING V ALV E COLD WATE R IN AIR SEPARATOR BALL VALVE (TYPICAL) DRAIN POIN T (TYPICAL) MA KE UP WATE R HOT W ATER OUT BOILER CIRCULATOR BACKFLOW PREVENTER PRESSURE REDUCING VALV E PRESSURE GAUGE EXPANSIO N TANK [...]

Installation & Operation Manual 45 6 Hydronic piping (continued) BOILER INDIRECT DHW T ANK DOMESTIC HOT WA TE R CIRCULA TOR ANTI-SCALD MIXING V A L VE COLD WAT E R IN TEMPERA TURE / PRESSURE GAUGE AIR SEP ARA TOR BALL V AL VE (TYPICAL) UNION (TYPICAL) PRESSURE RELIEF VAL VE DRAIN PO INT (TYPICAL) MAKE UP W A TER HOT WAT E R OUT BOILER CIRCULA T[...]

Installation & Operation Manual 46 6 Hydronic piping INDIRE CT DHW T AN K BACKFLOW PREVENTER PRESSURE REDUCING V AL VE PRESSURE GAUGE ANTI-SCAL D MIXING V A L VE TEMPERA TURE / PRESSURE GAUGE AIR SEP ARA TOR EXP ANSI ON TA N K BALL V AL VE (TYPICAL ) DRAIN PO INT (TYPICAL ) MA KE U P W A TE R ZONE V AL VES (TYPICAL ) BOILER CIRCULA TOR BOILER 2[...]

Installation & Operation Manual 47 BOILER INDIRE CT DHW T AN K DOMESTIC HOT WA TER CIRCULA TOR BACKFLOW PREVENTER PRESSURE REDUCING V AL VE PRESSURE GAUGE ANTI-SCAL D MIXING V A L VE COLD WAT E R IN TEMPERA TURE / PRESSURE GAUGE AIR SEP ARA TOR EXP ANSION TA N K BALL V AL VE (TYPICAL) UNION (TYPICAL) PRESSURE RELIEF V AL V E DRAIN POINT (TYPICA[...]

7 Gas connections Connecting gas supply piping 1. Remove the front access panel and refer to FIG. 7-1 to pipe gas to the boiler. a. Install a field supplied sediment trap / drip leg upstream of the boiler gas controls. MANUAL SHUTOFF V AL V E (FIELD SUPPLIED) UNION DRIP LEG GAS SUPPL Y Figure 7-1 Gas Supply Piping 2. Support piping with hangers, no[...]

7 Gas connections (continued) Failure to apply pipe sealing compound as detailed in this manual can result in severe personal injury, death, or substantial property damage. Knight wall mount boilers are typically shipped ready to fire on natural gas. Check boiler rating plate to determine which fuel the boiler is set for. If set to natural gas, it [...]

50 Installation & Operation Manual 7 Gas connections Nominal Iron Pipe Size (Inches) Natural Gas Pipe Capacity Chart Length of Pipe in Straight Feet for 1/2 PSI 10 20 30 40 50 60 70 80 90 100 125 150 175 200 1/2 175 120 97 82 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 3/4 369 256 205 174 155 141 128 121 113 106 95 86 79 74 1 697 477 384 328 292 26[...]

51 Installation & Operation Manual 7 Gas connections (continued)  WARNING When re-tightening the set screw, be sure to tighten securely to prevent gas leaks. Do not check for gas leaks with an open flame -- use the bubble test. Failure to use the bubble test or check for gas leaks can cause severe personal injury, death, or substantial prope[...]

8 Field wiring ELECTRICAL SHOCK HAZARD – For your safety, turn off electrical power supply before making any electrical connections to avoid possible electric shock hazard. Failure to do so can cause severe personal injury or death. Wiring must be N.E.C. Class 1. If original wiring as supplied with boiler must be replaced, use only type 105°C wi[...]

53 Installation & Operation Manual 8 Field wiring (continued) Thermostat 1. Connect the room thermostat or end switch (isolated contact only) to heat/loop demand 1, 2, or 3, as shown in FIG. 8-4. 2. Install the thermostat on the inside wall away from influences of drafts, hot or cold water pipes, lighting fixtures, television, sunlight, or fire[...]

54 Installation & Operation Manual 8 Field wiring Boiler management system 1. An external control may be connected to control either the firing rate or the set point of the boiler. If the external control uses a set of contacts to enable the boiler, connect the contacts to the Room Thermostat 1 terminals. Otherwise, the SMART SYSTEM control wil[...]

55 Installation & Operation Manual 8 Field wiring (continued) HEA T/LOOP DEMAND HEA T/LOOP DEMAND HEA T/LOOP DEMAND HEA T/LOOP DEMAND HEA T/LOOP DEMAND HEA T/LOOP DEMAND 1 2 3 Figure 8-4 Low Voltage Field Wiring Connections[...]

56 Installation & Operation Manual 9 Condensate disposal Condensate drain 1. This boiler is a high efficiency appliance that produces condensate. 2. The bottom of the boiler has a 1/2 inch pipe for connection of a 1/2 inch PVC pipe (FIG. 9-1). 3. Slope condensate tubing down and away from the boiler into a drain or condensate neutralizing filte[...]

10 Start-up Check/control water chemistry Do not use petroleum-based cleaning or sealing compounds in the boiler system. Damage to elastomer seals and gaskets in the system could occur, resulting in substantial property damage. Hardness less than 7 grains 1. Consult local water treatment companies for hard water areas (above 7 grains hardness). Chl[...]

58 Installation & Operation Manual 10 Start-up Check for gas leaks Before starting the boiler, and during initial operation, smell near the floor and around the boiler for gas odorant or any unusual odor. Remove the front access panel and smell the interior of the boiler enclosure. Do not proceed with startup if there is any indication of a gas[...]

59 Installation & Operation Manual 10 Start-up (continued) Final checks before starting the boiler  Read the Knight Wall Mount Service Manual to familiarize yourself with SMART SYSTEM control module operation. Read this manual, page 60 for proper steps to start boiler.  Verify the boiler and system are full of water and all system compone[...]

10 Start-up Figure 10-2 Operating Instructions 60 Installation & Operation Manual[...]

61 Installation & Operation Manual Please note that the brackets ([]) denote screen status. NOTICE 4. Place the boiler into the active position by pressing the RIGHT SELECT [ON] key (FIG. 11-1, page 69). 5. Locate the pinhole button below the RESET button on the display board (FIG. 11-1). Insert a thin wire (such as a paper clip) into the hole [...]

62 Installation & Operation Manual 10 Start-up Set domestic hot water (DHW) operation Verify DHW mode There are two (2) modes of operation for DHW. In Normal Mode, when a DHW demand begins, the control will start the DHW pump, turn off the boiler pump (if running), and modulate to bring the outlet temperature to the DHW boiler set point. The ma[...]

63 Installation & Operation Manual 11 Operating information General How the boiler operates The Knight wall mount boiler uses an advanced stainless steel heat exchanger and electronic control module that allows fully condensing operation. The blower pulls in air and pushes flue products out of the boiler through the heat exchanger and flue pipi[...]

64 Installation & Operation Manual 11 Operating information Temperature control Modulation The Knight wall mount boiler is capable of modulating its firing rate from a minimum of 20% to a maximum of 100%. The firing rate is dictated by the call for heat (i.e., space heating or domestic hot water), the heating load, ramp delay (if enabled), and [...]

65 Installation & Operation Manual 11 Operating information (continued) Monitor external limits Connections are provided on the connection board for external limits such as flow switch, low water cutoff, gas pressure switches, and a louver proving switch. The SMART SYSTEM will shut off the burner and inhibit relighting whenever any of these ext[...]

66 Installation & Operation Manual 11 Operating information DHW, Night Setback, and Ramp Delay operation with cascade For normal mode DHW operation any boiler(s) in the Cascade can be selected to provide heat for a DHW call. Select a boiler to be designated as the DHW boiler. Connect the DHW thermostat or sensor to the terminals on the Low Volt[...]

67 Installation & Operation Manual 11 Operating information (continued) Sequence of operation OPERATION DISPLAY 1. Upon a call for heat, the gas pressure switch(es) must be closed. 2. Once the gas pressure switch(es) are closed, the control turns on the appropriate pumps (system and boiler pumps for space heating, DHW pump for DHW). The flow sw[...]

68 Installation & Operation Manual 11 Operating information Sequence of operation (continued) Access modes User The user can adjust space heating and tank target temperatures by pressing the NAVIGATION dial when “  SETPOINTS” is flashing at the bottom of the display. The date and time, and the temperature units can also be changed (see p[...]

69 Installation & Operation Manual Knight wall mount boiler control module NA VIGA TION DIAL Figure 11-1 Control Panel Use the control panel (FIG. 11-1) to set temperatures, operating conditions, and monitor boiler operation. 11 Operating information (continued) The information on the bottom of the display shows the functions of the two SELECT [...]

70 Installation & Operation Manual 11 Operating information 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. PREP[...]

71 Installation & Operation Manual 11 Operating information (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 sens[...]

Installation & Operation Manual 72 11 Operating information Status Display Screens (cont’d) Section Display Description D (LEFT SELECT key function) MENU Press and hold the LEFT SELECT key for 5 seconds to enter the Menu Screen. EXIT Press the LEFT SELECT key to exit the current screen or setting. YES Press the LEFT SELECT key to confirm that[...]

Installation & Operation Manual 73 Maintenance and annual startup Table 12A 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 for leaks (water, ga[...]

Installation & Operation Manual 12 Maintenance Follow the Service and maintenance procedures given throughout this manual and in component literature shipped with the boiler. Failure to perform the service and maintenance could result in damage to the boiler or system. Failure to follow the directions in this manual and component literature cou[...]

Installation & Operation Manual Check expansion tank 1. Expansion tanks provide space for water to move in and out as the heating system water expands due to temperature increase or contracts as the water cools. Tanks may be open, closed or diaphragm or bladder type. See Section 6 - Hydronic Piping for suggested best location of expansion tanks[...]

Installation & Operation Manual 76 12 Maintenance Figure 12-2 Burner Assembly Check flame signal 1. At high fire the flame signal shown on the display should be at least 10 microamps. 2. A lower flame signal may indicate a fouled or damaged flame sense electrode. If cleaning the flame sense electrode does not improve, ground wiring is in good c[...]

Installation & Operation Manual 77 12 Maintenance (continued) Oiled bearing circulators 1. The circulator shipped with the Knight wall mount boiler is water-lubricated. No oiling is required. 2. Check other circulators in the system. Oil any circulators requiring oil, following circulator manufacturer’s instructions. Over-oiling will damage t[...]

Installation & Operation Manual 78 13 Diagrams BOX DEPICTS OPTIONAL ITEMS LADDER DIAG RAM LBL201 48 REV D 120 VAC 24 VAC 120VAC TERMINAL STRIP 120V SUPPLY "L" ON / OFF SW ITCH X1- 6 F2 NEUTRAL CN5-6 CN5-12 CN5-11 X4- 2 X4-1 0 X4- 11 INTEGRATED CONTROL LOUVER RELAY COIL 24VAC LOUVER PROVING SWITCH CN5-4 X4-4 X2-1 GAS VALVE GAS VALVE RE[...]

Installation & Operation Manual 79 X1- 7 ON/OFF SW ITCH 1 2 3 4 5 G R R W R T W BK Y BL BLO WE R -T HIGH LIMIT SENSOR S1b OPERATING SENSOR S1a INLET SENSOR S2 FLUE SENSO R S3a FLUE SENSOR S3 b INTEG RAT ED CONTROL BK Y GAS VALVE @24VAC SPARK ROD TRANSFORMER TR 2 G HIGH VOLTAGE SPARK LEAD CAUTI ON FLAME SENSOR ALARM CONTACTS RUN-TIME CONTACTS 24[...]

Revision A (ECO #C05747) initial release. Reflects the new model numbers for the Knight Wall Mount upgrade. Revision B (ECO #C0 6188) reflects updates made to the ladder and wiring diagrams (ECO #C06158). Revision C (ECO #C06234) reflects changes made to the Service Reminder feature. Revision D (ECO #C08222) reflects the new layout in InDesign, the[...]