Lochinvar WH 55-399 Installation & Operation Manual
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Lochinvar WH 55-399 Installation & Operation Manual

Lochinvar knight wall mount boiler
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See also: User's Information Manual
WH-I-O Rev A
Installation & Operation Manual
Models: WH 55 - 399
This manual must only be used by
WARNING
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, death, or
substantial property damage.
Save this manual for future reference.

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Summary of Contents for Lochinvar WH 55-399

  • Page 1 WH-I-O Rev A Installation & Operation Manual Models: WH 55 - 399 This manual must only be used by WARNING a qualified heating installer / service technician. Read all instructions, including this manual and the Knight Wall Mount Service Manual, before installing.

  • Page 2: Table Of Contents

    Contents HAZARD DEFINITIONS ......2 Vertical Termination - Optional Concentric Vent ..29-30 PLEASE READ BEFORE PROCEEDING .

  • Page 3: Please Read Before Proceeding

    Installation & Operation Manual Please read before proceeding When servicing boiler – Installer – Read all instructions, WARNING including this manual and the Knight • To avoid electric shock, disconnect electrical supply Wall Mount Service Manual, before before performing maintenance. installing.

  • Page 4: The Knight Wall Mount Boiler - How It Works

    Installation & Operation Manual The Knight Wall Mount Boiler - How it works... Stainless steel heat exchanger 15. Gas connection pipe Allows system water to flow around specially designed Threaded pipe connection. This pipe should be tubes for maximum heat transfer, while providing connected to the incoming gas supply for the purpose of protection against flue gas corrosion.
  • Page 5 Installation & Operation Manual The Knight Wall Mount Boiler - How it works... (continued) Models 55 - 399 FRONT OF UNIT Front View Bottom View Left Side (inside unit) Right Side (inside unit)

  • Page 6: Ratings

    7. The Knight Wall Mount boiler input rate, on some models, Notes: is reduced for vent lengths beyond the minimum. Two inch 1. As an Energy Star Partner, Lochinvar has determined that vent will reduce Models WH(N,L) 055, WH(N,L) 085 and Knight wall mount boilers meet the Energy Star guidelines WH(N,L)110 by 0.6%, 0.94%, and 1.2% for every 10 feet...

  • Page 7: Determine Boiler Location

    Installation & Operation Manual Determine boiler location Installation must comply with: This appliance is certified as an indoor WARNING appliance. Do not install the appliance • Local, state, provincial, and national codes, laws, outdoors or locate where the appliance will regulations, and ordinances.
  • Page 8 Installation & Operation Manual Determine boiler location Figure 1-1 Closet Installation - Minimum Required Clearances For closet installations, CPVC or WARNING LEFT stainless steel vent material MUST 6" MINIMUM 0" MINIMUM BE used in a closet structure due to VENTILATING elevated temperatures.

  • Page 9: Provide Air Openings To Room

    Installation & Operation Manual Determine boiler location (continued) Provide air openings to room: Residential garage installation Knight wall mount boiler alone in boiler room Precautions Take the following precautions when installing the appliance in 1. No air ventilation openings into the boiler room are a residential garage.

  • Page 10: Corrosive Contaminants And Sources

    Installation & Operation Manual Determine boiler location When using an existing vent system to Table 1A Corrosive Contaminants and Sources install a new boiler: Products to avoid: Failure to follow all instructions can result WARNING in flue gas spillage and carbon monoxide Spray cans containing chloro/fluorocarbons emissions, causing severe personal injury Permanent wave solutions...

  • Page 11: Removing A Boiler From Existing Common Vent

    Installation & Operation Manual Determine boiler location (continued) When removing a boiler from existing common vent system: Do not install the Knight wall mount g. Any improper operation of the common venting system DANGER should be corrected so the installation conforms with boiler into a common vent with any other the National Fuel Gas Code, ANSI Z223.1/NFPA 54 appliance.

  • Page 12: Prepare Boiler

    Installation & Operation Manual Prepare boiler Remove boiler from wood pallet Table 2A LP Conversion Table LP Conversion Table 1. After removing the outer shipping carton from the boiler, remove the parts box. Model LP Orifice Stamping 2. To remove the boiler from the pallet: Remove the two (2) lag bolts securing the bottom of the unit to the pallet.

  • Page 13: Mounting The Boiler

    Installation & Operation Manual Prepare boiler (continued) WARNING The boiler is too heavy for a single person to 13. Reattach the Molex plug to the gas valve. lift. A minimum of two people is needed for 14. Models 55 - 285 only, turn the gas valve power switch to mounting the boiler onto the bracket.

  • Page 14: General Venting

    Installation & Operation Manual General venting Direct venting options - Sidewall Vent Figure 3-1 PVC/CPVC Two-Pipe Sidewall Termination - Figure 3-2 Stainless Steel Two-Pipe Sidewall See page 21 for more details Termination - See page 22 for more details Figure 3-3 PVC/CPVC Concentric Sidewall Termination - See page 24 for more details...
  • Page 15 Installation & Operation Manual General venting (continued) Direct venting options - Vertical Vent Figure 3-5 Stainless Steel Two- Figure 3-6 PVC/CPVC Concentric Figure 3-4 PVC/CPVC Two-Pipe Pipe Vertical Termination - See Vertical Termination - See page 29 Vertical Termination - See page 27 page 27 for more details for more details for more details...

  • Page 16: Install Vent And Combustion Air Piping

    The 2" and 3" Concentric Vent Kits available from stainless steel material MUST BE used in a Lochinvar (see Section 4 – Sidewall Termination – Optional closet/alcove structure. Failure to follow this Concentric Vent) and the 2" and 3" Concentric Vent Kits...

  • Page 17: Pvc/Cpvc Air Intake/Vent Connections

    Installation & Operation Manual General venting (continued) Dry fit vent or air piping to ensure proper fit up before While primer is still wet, apply an even coat of assembling any joint. The pipe should go a third to approved cement to the pipe equal to the depth of two-thirds into the fitting to ensure proper sealing after the fitting socket.

  • Page 18: Air Inlet Pipe Materials

    Installation & Operation Manual General venting Air inlet pipe materials: The air inlet pipe(s) must be sealed. Choose acceptable The PVC, CPVC, or ABS air inlet pipe should be cleaned and combustion air inlet pipe materials from the following list: sealed with the pipe manufacturer’s recommended solvents and standard commercial pipe cement for the material used.

  • Page 19: Max. Allowable Vent Piping Lengths

    Installation & Operation Manual General venting (continued) Table 3B Approved Stainless Steel Terminations and Adapters ProTech Heat Fab Z Flex FasNSeal Saf-T Vent Z-Vent Model Intake Intake Boiler Flue Boiler Intermediate Flue Boiler Flue Intake Air Adapter Termination Adapter Adapter Termination Adapter Termination...

  • Page 20: Removing From Existing Vent

    Installation & Operation Manual General venting Removing from existing vent • Using the room air kit makes the unit vulnerable to combustion air contamination from within the Follow the instructions in Section 1, page 11 of this manual building. Please review Section 1, Prevent Combustion when removing a boiler from an existing vent system.

  • Page 21: Sidewall Direct Venting

    Installation & Operation Manual Sidewall direct venting Vent/air termination – sidewall Figure 4-1A PVC/CPVC Sidewall Termination of Air and Vent Follow instructions below when WARNING determining vent location to avoid TO BOILER INTAKE AIR possibility of severe personal injury, death, CONNECTION or substantial property damage.
  • Page 22 Installation & Operation Manual Sidewall direct venting Figure 4-2A Clearance to Gravity Air Inlets Vent/air termination – sidewall Figure 4-1C Alternate Venting Arrangement (if Space Allows) w/Field Supplied Fittings TO BOILER 12" INTAKE AIR COUPLING MIN. CONNECTION 12” MIN 15” MAX FROM BOILER VENT PIPE VENT / AIR...

  • Page 23: Prepare Wall Penetrations

    Installation & Operation Manual Sidewall direct venting (continued) Prepare wall penetrations Figure 4-4B Alternate Sidewall Termination Assembly w/ Field Supplied Fittings Use the factory supplied wall plate as a template to locate the vent and air intake holes and mounting holes. ELBOW AIR PIPING Air pipe penetration:...

  • Page 24: Sidewall Termination - Optional Concentric Vent

    Description and usage 5. Partially assemble the concentric vent termination kit. Clean Lochinvar offers optional concentric combustion air and vent and cement using the procedures found in these instructions. pipe termination kits (Factory Kit #CVK3003 for 3" diameter Cement the Y concentric fitting to the larger kit pipe - models 155 - 199, #CVK3008 for 2"...
  • Page 25 Installation & Operation Manual Sidewall direct venting (continued) Sidewall termination – optional concentric vent models Figure 4-9 2" and 3" Concentric Vent Dimensional Figure 4-10 4" Concentric Vent Dimensional Drawing Drawing (reference Table 3C on page 19) (reference Table 3C on page 19) "B"...
  • Page 26 Installation & Operation Manual Sidewall direct venting Sidewall termination – optional concentric vent Figure 4-12 Concentric Vent Sidewall Attachment Multiventing sidewall terminations DO NOT use field-supplied couplings to CAUTION extend pipes. Airflow restriction will occur When two (2) or more direct vent appliances are vented near and may cause intermittent operation.

  • Page 27: Vertical Direct Venting

    Installation & Operation Manual Vertical direct venting Vent/air termination – vertical Follow instructions below when Rooftop vent and air inlet terminations WARNING WARNING determining vent location to avoid must terminate in the same pressure zone, possibility of severe personal injury, unless vertical vent sidewall air is set up as death or substantial property damage.

  • Page 28: Prepare Roof Penetrations

    Installation & Operation Manual Vertical direct venting Vent/air termination – vertical Prepare roof penetrations Multiple vent/air terminations Air pipe penetration: 1. When terminating multiple Knight wall mount boilers, Cut a hole for the air pipe. Size the air pipe hole as terminate each vent/air connection as described in this close as desired to the air pipe outside diameter.

  • Page 29: Vertical Termination - Optional Concentric Vent

    Description and usage 2. Cut one (1) hole (5 inch diameter for #CVK3003 installations Lochinvar offers an optional concentric combustion air and or 4 inch diameter for #CVK3008 installations) into the vent pipe termination kit. Both combustion air and vent structure to install the termination kit.
  • Page 30 Installation & Operation Manual Vertical direct venting Vertical termination – optional concentric vent DO NOT use field-supplied couplings to Do not operate the appliance with CAUTION WARNING extend pipes. Airflow restriction will occur. the rain cap removed or recirculation of combustion products may occur. 6.

  • Page 31: Optional Vertical Concentric Venting

    Installation & Operation Manual Vertical direct venting (continued) Alternate vertical concentric venting This appliance may be installed with a concentric vent Figure 5-8 Concentric Vent Example 1 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 FLUE EXHAUST air routing.
  • Page 32 Installation & Operation Manual 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 this manual. Figure 5-10 Existing Vent as a Chase FLUE EXHAUST AIR INLET SEAL...

  • Page 33: Hydronic Piping

    Installation & Operation Manual Hydronic piping System water piping methods General piping information The Knight wall mount is designed to function in a closed Basic steps are listed below along with illustrations on the loop pressurized system not less than 12 psi. A temperature following pages (FIG.’s 6-3 through 6-12), which will guide and pressure gauge is included to monitor system pressure you through the installation of the Knight wall mount boiler...

  • Page 34: Near Boiler Piping Components

    DHW and space heating. to install check valves could result in a reverse flow Lochinvar offers the Squire which is a series of indirect condition during pump(s) off cycle. water heaters. The Squire features a stainless steel vessel 6.

  • Page 35: Near Boiler Piping Connections

    Installation & Operation Manual Hydronic piping (continued) Near boiler piping connections Figure 6-1A Near Boiler Piping Figure 6-1B Near Boiler Piping w/Low Loss Header VENT VENT VENT DOMESTIC OUTLET HOT WATER INLET DOMESTIC HOT PUMP OUTLET WATER PUMP INLET INDIRECT CONDENSATE DOMESTIC INDIRECT...
  • Page 36 Installation & Operation Manual Hydronic piping Figure 6-2 Pressure Drop vs. Flow 3.00 9.00 8.00 2.50 7.00 MODEL MODEL 2.00 6.00 5.00 1.50 4.00 1.00 3.00 2.00 0.50 1.00 0.00 0.00 -0.50 FLOW FLOW 3.50 3.00 2.00 1.80 2.50 1.60 MODEL MODEL 1.40...

  • Page 37: Variable Speed Pump Option

    Installation & Operation Manual Hydronic piping (continued) Variable speed pump option Table 6B Recommended Variable Speed Pumps VFD PUMP 36.00 33.00 30.00 27.00 24.00 21.00 18.00 15.00 UPS26-96FC/VS 12.00 TACO 0013 IFC VS 9.00 UPS26-96 FC/VS 50% 6.00 TACO 0013 IFC VS 50% 3.00 0.00 FLOW...
  • Page 38 Installation & Operation Manual Hydronic piping Figure 6-3 Single Boiler - Primary / Secondary Piping PRESSURE REDUCING VALVE PRESSURE BACKFLOW GAUGE PREVENTER MAKE UP WATER SEPARATOR SYSTEM SUPPLY SENSOR MAY SUBSTITUTE LOW LOSS HEADER FROM SYSTEM SYSTEM NOT TO EXCEED 4 PIPE DIA OR MAX. OF 12" APART SYSTEM BALL VALVE CIRCULATOR...
  • Page 39 Installation & Operation Manual Hydronic piping (continued) Figure 6-4 Single Boiler - Single Temperature with Zone Valves - DHW Priority ZONE #1 PRESSURE PRESSURE REDUCING VALVE GAUGE ZONE #2 ZONE #3 ZONE #4 BACKFLOW PREVENTER ZONE VALVES (TYPICAL) MAKE UP WATER DIFFERENTIAL PRESSURE...
  • Page 40 Installation & Operation Manual Hydronic piping Figure 6-5 Single Boiler - Single Temperature Zoned with Circulators - DHW Priority ZONE #1 PRESSURE PRESSURE GAUGE REDUCING VALVE ZONE #2 ZONE #3 ZONE #4 BACKFLOW FLOW CHECK PREVENTER VALVE (TYPICAL) MAKE UP WATER SYSTEM SUPPLY SENSOR ZONE CIRCULATORS...
  • Page 41 Installation & Operation Manual Hydronic piping (continued) Figure 6-6 Multiple Boilers - Single Temperature Zoned with Zone Valves - DHW Priority Number of Units Model Required Pipe Sizes 1-1/4" 1-1/2" 1-1/2" 2" 2" 2" 2" 1-1/4" 1-1/2" 2" 2" 2" 2-1/2"...
  • Page 42 Installation & Operation Manual Hydronic piping Figure 6-7 Multiple Boilers - Single Temperature Zoned with Circulators - DHW Priority Number of Units Model Required Pipe Sizes 1-1/4" 1-1/2" 1-1/2" 2" 2" 2" 2" 1-1/4" 1-1/2" 2" 2" 2" 2-1/2" 2-1/2" 1-1/2"...
  • Page 43 Installation & Operation Manual Hydronic piping (continued) Figure 6-8 Single Boiler - Multiple Temperature - DHW Priority PRESSURE TEMPERATURE TEMPERATURE TEMPERATURE REDUCING VALVE LOOP #1 LOOP #2 LOOP #3 BACKFLOW PREVENTER PRESSURE GAUGE MAKE MIXING VALVES SYSTEM WATER (TYPICAL) SUPPLY SENSOR AIR SEPARATOR EXPANSION...
  • Page 44 Installation & Operation Manual Hydronic piping Figure 6-9 Multiple Boilers - Multiple Temperature - DHW Piped as a Zone Number of Units Model Required Pipe Sizes 1-1/4" 1-1/2" 1-1/2" 2" 2" 2" 2" 1-1/4" 1-1/2" 2" 2" 2" 2-1/2" 2-1/2" 1-1/2"...
  • Page 45 Installation & Operation Manual Hydronic piping (continued) Figure 6-10 Single Boiler - Full Flow - Single Temperature - Zoned with Zone Valves - DHW Priority ZONE #1 PRESSURE PRESSURE REDUCING VALVE GAUGE ZONE #2 ZONE #3 ZONE #4 BACKFLOW PREVENTER ZONE VALVES (TYPICAL) MAKE UP...
  • Page 46 Installation & Operation Manual Hydronic piping Figure 6-11 Single Boiler - Full Flow - Single Temperature Zoned with Valves - DHW Piped as a Zone ZONE #1 PRESSURE REDUCING VALVE PRESSURE ZONE #2 ZONE #3 ZONE #4 GAUGE BACKFLOW PREVENTER ZONE VALVES (TYPICAL) MAKE UP...
  • Page 47 Installation & Operation Manual Hydronic piping (continued) Figure 6-12 Single Boiler - Full Flow - Single Temperature Zoned with Circulators - DHW Piped as a Zone ZONE #1 PRESSURE PRESSURE GAUGE REDUCING VALVE ZONE #2 ZONE #4 ZONE #3 BACKFLOW FLOW CHECK PREVENTER VALVE...

  • Page 48: Gas Connections

    Installation & Operation Manual Gas connections Connecting gas supply piping 1. Remove the front access panel and refer to FIG. 7-1 2. Support piping with hangers, not by the boiler or its to pipe gas to the boiler. accessories. Install a field supplied sediment trap / drip leg The gas valve and blower will not support upstream of the boiler gas controls.

  • Page 49: Natural Gas

    Installation & Operation Manual Gas connections (continued) Natural gas: Failure to apply pipe sealing compound WARNING as detailed in this manual can result Pipe sizing for natural gas in severe personal injury, death, or substantial property damage. 1. Refer to Table 7A for pipe length and diameter. Based on Knight wall mount boilers are typically rated boiler input (divide by 1,000 to obtain cubic feet per WARNING...

  • Page 50: Check Inlet Gas Supply

    Installation & Operation Manual Gas connections Table 7A Natural Gas Pipe Size Chart Natural Gas Pipe Capacity Chart Nominal Iron Pipe Length of Pipe in Straight Feet for 1/2 PSI Size (Inches) 1-1/4 1400 1-1/2 2150 1500 1210 1020 4100 2820 2260 1950...

  • Page 51: Gas Pressure

    Installation & Operation Manual Gas connections (continued) Gas Pressure When re-tightening the set screw, be WARNING sure to tighten securely to prevent gas The gas pressure must remain between 4 inches w.c. (natural), leaks. 8 inches w.c. (LP) minimum and 14 inches w.c. (natural and LP) Do not check for gas leaks with an open maximum during stand-by (static) mode and while in operating flame -- use the bubble test.

  • Page 52: Field Wiring

    Installation & Operation Manual Field wiring ELECTRICAL SHOCK HAZARD – For 4. Wire the boiler pump as shown in FIG. 8-2. WARNING your safety, turn off electrical power supply 5. When connecting a domestic hot water (DHW) pump, before making any electrical connections connect the wiring to the line voltage terminal strip as to avoid possible electric shock hazard.

  • Page 53: Outdoor Temperature Sensor

    Connect this temperature reaches the tank set point. output to the 0 - 10V input on the boiler pump speed control. 2. The tank sensor included with the Lochinvar Squire Rate output Indirect DHW tank (TST20015) is the only sensor suitable for use with the SMART SYSTEM control.

  • Page 54: Wiring Of The Cascade

    Installation & Operation Manual Field wiring System supply sensor Wiring of the cascade 1. By installing the system supply sensor into the supply When wiring the boilers for Cascade operation, select one boiler of the primary loop, the temperature of the primary as the Leader boiler.
  • Page 55 Installation & Operation Manual Field wiring (continued) Figure 8-4 Low Voltage Field Wiring Connections...

  • Page 56: Condensate Disposal

    Installation & Operation Manual Condensate disposal Condensate drain Use materials approved by the authority NOTICE having jurisdiction. In the absence of other 1. This boiler is a high efficiency appliance that produces authority, PVC and CPVC pipe must comply condensate. with ASTM D1785 or D2845.

  • Page 57: Startup

    Installation & Operation Manual Start-up Check/control water chemistry 4. At initial fill and during boiler startup and testing, check system thoroughly for any leaks. Repair all leaks before Do not use petroleum-based cleaning or proceeding further. CAUTION sealing compounds in the boiler system. Damage to elastomer seals and gaskets Eliminate all system leaks.

  • Page 58: Check For Gas Leaks

    Installation & Operation Manual Start-up Check for gas leaks Inspect/fill condensate system Before starting the boiler, and during Inspect/check condensate lines and fittings WARNING initial operation, smell near the floor and 1. Inspect the condensate drain line, condensate fittings and around the boiler for gas odorant or any condensate trap.

  • Page 59: Start The Boiler

    Installation & Operation Manual Start-up (continued) Final checks before starting the boiler  Check vent piping and air piping 1. Check for gas tight seal at every connection, seam of air  Read the Knight Wall Mount Service Manual to piping, and vent piping.
  • Page 60 Installation & Operation Manual Start-up Figure 10-2 Operating Instructions - Models 55 - 285...
  • Page 61 Installation & Operation Manual Start-up (continued) Figure 10-3 Operating Instructions - Model 399...

  • Page 62: Set Space Heating Operation

    Installation & Operation Manual Start-up Check flame and combustion Set space heating operation (continued) Please note that the brackets ([]) denote NOTICE Determine controlling sensor screen status. For space heating systems, the temperature control can be 4. Place the boiler into the active position by pressing the based on one of three sensors;...
  • Page 63 Installation & Operation Manual Start-up (continued) Set domestic hot water (DHW) operation Verify DHW mode There are two (2) modes of operation for DHW. In Normal Turn the NAVIGATION dial to adjust the minutes. Press Mode, when a DHW demand begins, the control will start the NAVIGATION dial.

  • Page 64: Operating Information General

    Installation & Operation Manual Operating information General The Knight wall mount boiler can also be programmed to accept a call for heat from a 0 - 10V signal, reference the Knight How the boiler operates Wall Mount Service Manual for a detailed explanation of this procedure.
  • Page 65 Installation & Operation Manual Operating information (continued) Protection features Ramp delay For systems with lower flow, the SMART SYSTEM can limit Outlet temperature, flue temperature, and temperature the firing rate (when enabled) when a space heating call for rise limiting heat starts, or when switching from a DHW call for heat to a space heating call for heat.
  • Page 66 Installation & Operation Manual Operating information Monitor external limits High limit operations The Knight wall mount is equipped with adjustable automatic Connections are provided on the connection board for reset and manual reset high limits. The automatic reset high external limits such as flow switch, low water cutoff, gas limit has a maximum set point of 200°F and the manual reset pressure switches, and a louver proving switch.

  • Page 67: Cascade

    Installation & Operation Manual Operating information (continued) Outdoor reset operation, if used Sequence of the cascade Target temperature with outdoor reset To equalize the run time of all boilers on the Cascade, the firing sequence will automatically be changed at set intervals. This feature improves the system’s efficiency as the outdoor temperature warms up.

  • Page 68: Sequence Of Operation

    Installation & Operation Manual Operating information 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).

  • Page 69: Access Modes

    Installation & Operation Manual Operating information (continued) OPERATION DISPLAY 8. If the space heating call for heat is active, and the tank thermostat or sensor starts a DHW call for heat, the boiler will switch to the DHW mode. If programmed for normal DHW operation (not as a zone), the DHW pump will turn on first, then the boiler pump will turn off 2 seconds later.

  • Page 70: Knight Wall Mount Boiler Control Module

    Installation & Operation Manual Operating information Knight wall mount boiler control module Use the control panel (FIG. 11-1) to set temperatures, operating conditions, and monitor boiler operation. Figure 11-1 Control Panel NAVIGATION DIAL 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 SETPOINTS = NAVIGATION Dial - Pressing Down...

  • Page 71: Status Display Screens

    Installation & Operation Manual Operating information (continued) Figure 11-2 Status Display Screen (CALL FOR (BOILER HEAT) STATUS) (OPERATIONAL INFORMATION) (RIGHT SELECT KEY) (LEFT SELECT KEY) (NAVIGATION DIAL) Status Display Screens Section Display Description The unit has not received a call for heat from a remote thermostat nor STANDBY has it received a call for heat from a DHW thermostat.
  • Page 72 Installation & Operation Manual Operating information Status Display Screens (cont’d) Section Display Description 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 (if connected). INLET TEMP: The temperature read at the inlet to the heat exchanger.
  • Page 73 Installation & Operation Manual Operating information (continued) Status Display Screens (cont’d) Section Display Description 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 NAVIGATION dial will select the setting indicated by the cursor.

  • Page 74: Maintenance Maintenance And Annual Startup

    Installation & Operation Manual Maintenance Maintenance and annual startup Table 12A Service and Maintenance Schedules Owner maintenance Service technician (see the Knight Wall Mount User’s Information (see the following pages for instructions) Manual for instructions) General: • Address reported problems •...

  • Page 75: Address Reported Problems

    Installation & Operation Manual Maintenance (continued) Follow the Service and maintenance procedures given throughout this manual and in component literature WARNING 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 could result in severe personal injury, death, or substantial property damage.

  • Page 76: Check Expansion Tank

    Installation & Operation Manual Maintenance Check expansion tank 2. After following the warning directions in this manual, if 1. Expansion tanks provide space for water to move in the relief valve weeps or will not seat properly, replace the and out as the heating system water expands due to relief valve.

  • Page 77: Cleaning Boiler Heat Exchanger

    Installation & Operation Manual Maintenance (continued) Cleaning boiler heat exchanger Figure 12-2 Burner Assembly 1. Shut down boiler: • Follow the “To Turn Off Gas to Appliance” instructions for the boiler in Section 10 - Startup. • Do not drain the boiler unless it will be exposed to freezing temperatures.

  • Page 78: Diagrams

    Installation & Operation Manual Diagrams Figure 13-1 Ladder Diagram 120VAC JUNCTION BOX NEUTRAL GROUND TERMINAL STRIP TERMINAL STRIP 120V SUPPLY "L" 120V SUPPLY "N" INTEGRATED CONTROL BLOWER ON / OFF KB ONLY SWITCH SYSTEM SYSTEM X1-6 X1-1 PUMP "L" PUMP "N" X1-2 3.15A SYSTEM...

  • Page 79: Wiring Diagram

    Installation & Operation Manual Diagrams (continued) Figure 13-2 Wiring Diagram LOW VOLTAGE BOX DEPICTS 120 VAC OPTIONAL ITEMS HIGH VOLTAGE BOX DEPICTS DUAL SENSOR SINGLE HOUSING INTEGRATED BOX DEPICTS CONNECTION BOARD CONTROL JUNCTION OPTIONAL ITEMS ALARM X1-3 CONTACTS PUMP RUN-TIME CONTACTS X1-4 24 VAC LOUVER...
  • Page 80 Revision A (ECO #C06854) initial release. WH-I-O Rev A 11/10...

This manual is also suitable for:

Knight whn055Knight whn085Knight whn110Knight whn155Knight whn199Knight whn285 ... Show all

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