Lochinvar Knight 50-210 User Manual Page 1

Installation & Operation ManualModels: 50 - 210This manual must only be used by aqualified heating installer / servicetechnician. Read all instru

Installation & Operation Manual1 Determine boiler location10Products to avoid:Spray cans containing chloro/fluorocarbonsPermanent wave solutionsC

Installation & Operation Manual2 Prepare boiler11Remove boiler from wood pallet1. After removing the outer shipping carton from the boiler,remove

Installation & Operation Manual2 Prepare boiler12Figure 2-4 Mounting the BoilerFigure 2-3 Installing Propane Orifice 13. Reattach the wiring conn

Installation & Operation Manual133 General ventingFigure 3-1 Two-Pipe Vertical Termination - See page23 for more detailsFigure 3-2 Two-Pipe Sidew

Installation & Operation Manual143 General venting Vent piping materialsUse only the materials listed in Table 3Abelow for vent pipe, and fitting

Installation & Operation Manual153 General venting (continued)Air intake/vent connections1. Combustion Air Intake Connector (FIG. 3-5) - Used to

Installation & Operation Manual163 General venting Vent, air piping and termination:The Knight wall mount boiler vent and air piping can beinstal

Installation & Operation Manual174 Sidewall direct ventingVent/air termination – sidewallFollow instructions below when determiningvent location

Installation & Operation Manual184 Sidewall direct venting 5. Maintain clearances as shown in FIG.’s 4-1A thru 4-3B, pages 17 and 18. Also maint

Installation & Operation Manual4 Sidewall direct venting (continued)Termination and fittings1. The air termination coupling must be oriented at l

2Hazard definitionsThe following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or

Installation & Operation Manual204 Sidewall direct venting (continued)Sidewall termination – optionalconcentric vent Description and usageLochinv

Installation & Operation Manual214 Sidewall direct venting Sidewall termination – optional concentric vent models Figure 4-8 Concentric Vent Dime

Installation & Operation Manual224 Sidewall direct venting (continued)Sidewall termination – optional concentric vent Multiventing sidewall termi

Installation & Operation Manual235 Vertical direct ventingVent/air termination – verticalFollow instructions below whendetermining vent location

Installation & Operation Manual245 Vertical direct venting Vent/air termination – vertical Prepare roof penetrations1. Air pipe penetration:a. C

Installation & Operation Manual255 Vertical direct venting (continued)Vertical termination – optional concentric vent Description and usageLochin

Installation & Operation Manual265 Vertical direct venting Vertical termination – optional concentric vent Figure 5-6 Concentric Vent Roof Inst

Installation & Operation Manual276 Hydronic pipingSystem water piping methodsThe Knight wall mount is designed to function in a closedloop pressu

Installation & Operation Manual286 Hydronic piping Circulator sizingThe Knight wall mount boiler heat exchanger does have a pressure drop, which

Installation & Operation Manual296 Hydronic piping (continued)Figure 6-2 Pressure Drop vs. Flow - Models 50 - 21020°F Temperature Rise Applicatio

Installation & Operation ManualPlease read before proceedingInstaller – Read all instructions,including this manual and the KnightWall Mount Servi

Installation & Operation Manual306 Hydronic piping It is required that near boiler piping systemsutilize Primary/Secondary configurations assh

Installation & Operation Manual31ZONE #1ZONE #2ZONE #3ZONE #4ZONE CIRCULATORS(TYPICAL)FLOW CHECKVALVE(TYPICAL)BOILERINDIRECTDHW TANKDOMESTICHOT WA

Installation & Operation Manual326 Hydronic piping ZONE #1ZONE #2ZONE #3ZONE #4INDIRECTDHW TANKBACKFLOWPREVENTERPRESSUREREDUCING VALVEPRESSUREGA

Installation & Operation Manual336 Hydronic piping (continued)BOILERINDIRECTDHW TANKDOMESTICHOT WATERCIRCULATORANTI-SCALDMIXING VALVECOLDWATERIN

Installation & Operation Manual346 Hydronic piping INDIRECTDHW TANKBACKFLOWPREVENTERPRESSUREREDUCING VALVEPRESSUREGAUGEANTI-SCALDMIXING VALVETEMP

Installation & Operation Manual35BOILERINDIRECTDHW TANKDOMESTICHOT WATERCIRCULATORBACKFLOWPREVENTERPRESSUREREDUCING VALVEPRESSUREGAUGEANTI-SCALDMI

Installation & Operation Manual367 Gas connectionsConnecting gas supply piping1. Remove the front access panel and refer to FIG. 7-1 to pipegas t

Installation & Operation Manual377 Gas connections (continued)Failure to apply pipe sealing compoundas detailed in this manual can result insever

Installation & Operation Manual387 Gas connections NominalIron PipeSize (Inches)Natural Gas Pipe Capacity ChartLength of Pipe in Straight Feet fo

Installation & Operation Manual397 Gas connections (continued) WARNINGWhen re-tightening the set screw, besure to tighten securely to prevent ga

Installation & Operation Manual4The Knight Wall Mount Boiler - How it works...1. Stainless steel heat exchangerAllows system water to flow through

Installation & Operation Manual408 Field wiring ELECTRICAL SHOCK HAZARD – For yoursafety, turn off electrical power supply beforemaking any elect

Installation & Operation Manual41Low voltage connections 1. Route all low voltage wires through the knockouts inthe bottom front right side, just

Installation & Operation Manual428 Field wiring Boiler management system1. An external control may be connected to control either thefiring rate

Installation & Operation Manual438 Field wiring (continued)(AUX) DHW TANK SENSORFigure 8-4 Low Voltage Field Wiring Connections

Installation & Operation Manual449 Condensate disposalCondensate drain1. This boiler is a high efficiency appliance that producescondensate.2. Th

Installation & Operation Manual4510 Start-upCheck/control water chemistryDo not use petroleum-based cleaning orsealing compounds in the boiler sy

Installation & Operation Manual4610 Start-up Check for gas leaksBefore starting the boiler, and during initialoperation, smell near the floor and

Installation & Operation Manual4710 Start-up (continued)Final checks before starting the boiler Read the Knight Wall Mount Service Manual tofami

Installation & Operation Manual4810 Start-up

Installation & Operation Manual4910 Start-up (continued)Check flame and combustion (continued)4. Place the boiler into the active position by pre

Installation & Operation ManualFront View 8207314132963116727Left Side (inside unit) 24251245221826Right Side (inside unit) The Knight Wall Mount

Installation & Operation Manual5010 Start-up Set domestic hot water (DHW) operationVerify DHW circulator modeThe DHW Mode is programmed to heat a

Installation & Operation Manual5111 Operating information GeneralHow the boiler operatesThe Knight wall mount boiler uses an advanced stainlessst

Installation & Operation Manual5211 Operating information Ramp delayFor systems with lower flow, the SMART SYSTEM can limit thefiring rate (when

Installation & Operation Manual5311 Operating information (continued)High limit operationsWhen outlet temperature exceeds 200°F, high limit actio

Installation & Operation Manual5411 Operating information Cascade (continued)If the water temperature at the system supply sensor is less thanth

Installation & Operation Manual5511 Operating information (continued)OPERATION DISPLAY1. Upon a call for heat, the control turns on the appropria

Installation & Operation Manual5611 Operating information Sequence of operation (continued)OPERATION DISPLAY8. If the DHW thermostat remains on f

Installation & Operation Manual57Knight wall mount boiler control moduleFigure 11-1 Control PanelUse the control panel (FIG. 11-1) to set temperat

Installation & Operation Manual5811 Operating informationStatus Display ScreensBy using the Previous/Next (, ) arrow keys on the SMART SYSTEM d

Installation & Operation Manual59Status Display Screens (cont’d)By using the Previous/Next (, ) arrow keys on the SMART SYSTEM display panel, yo

Installation & Operation Manual6RatingsNotes:1. As an Energy Star Partner, Lochinvar has determined thatKnight wall mount boilers meet the Energy

Installation & Operation Manual6011 Operating informationStatus Display Screens (cont’d)By using the Previous/Next (, ) arrow keys on the SMART

Installation & Operation Manual61Status Display Screens (cont’d)Operation of the cascadeThe boiler designated as the Leader will have two addition

Installation & Operation Manual62Maintenance and annual startupTable 12A Service and Maintenance SchedulesService technician(see the following pag

Installation & Operation Manual6312 Maintenance (continued)Follow the Service and maintenance procedures given throughout this manual and in comp

Installation & Operation Manual64Flue vent system and air piping1. Visually inspect the entire flue gas venting system and airpiping for blockage,

Installation & Operation Manual6512 Maintenance (continued)Perform start-up and checks1. Start boiler and perform checks and tests specified inSe

Installation & Operation Manual6613 DiagramsBOX DEPICTSOPTIONAL ITEMSLADDER DIAGRAMLBL7083 REV G120 VAC24 VAC120VACTERMINAL STRIP120V SUPPLY &quo

Installation & Operation Manual67DISPLAYX1-8X5-5X5-13X5-6X5-12INTEGRATED CONTROLBLOWERX1-1X2-2X2-1X1-7GASVALVEFLAMERODSPARKRODW/RGRRTWBKGR132WGBOX

Revision B (WB-I&O-Rev B) reflects changes made to the ratings page.Revision C (WB-I&O-Rev C) reflects changes made to the orifice onModels 15

Installation & Operation Manual1 Determine boiler location7The Knight wall mount boiler gasmanifold and controls met safe lightingand other perfo

Installation & Operation Manual1 Determine boiler location8Figure 1-2 Alcove Installation - Minimum Required Clearances Figure 1-1 Closet

Installation & Operation Manual9Provide air openings to room:Knight wall mount boiler alone in boiler room1. No air ventilation openings into the