Lochinvar Wall Mount Boiler WH 55-399 User Manual

WH-I-O Rev H Installation & Operation ManualModels: WH 55 - 399This manual must only be used by a qualified heating installer / service technici

Products to avoid:Spray cans containing chloro/fluorocarbonsPermanent wave solutionsChlorinated waxes/cleanersChlorine-based swimming pool chemicalsCa

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

Installation & Operation Manual2 Prepare boiler12Remove boiler from wood pallet1. After removing the outer shipping carton from the

Installation & Operation Manual2 Prepare boiler (continued)FASTENERS APPROPRIATEFOR WALL TYPEQTY: 4MOUNTING BRACKET(FACTORY SUPPLIED

3 General venting14 Installation & Operation ManualFigure 3-1 Two-Pipe Sidewall Termination - See page 22 for more detailsFigure 3-2

15 Installation & Operation Manual3 General venting This appliance requires a special venting system. Use only approved stainless ste

3 General venting Installation & Operation Manual16Model2" Max Vent/Air3" Max Vent/Air4" Max Vent/Air55 *80 feet 100

17 Installation & Operation Manual3 General venting (continued) MaterialsAir inlet pipe materials:The air inlet pipe(s) must be seale

3 General venting 18 Installation & Operation ManualAir contamination Pool and laundry products and common household and hobby produc

3 General venting (continued) 19 Installation & Operation ManualInstalling vent and air pipingUse only cleaners, primers, and solvent

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

3 General venting 20 Installation & Operation ManualThe installer must use a specific vent starter adapter at the flue collar connect

213 General venting (continued) Installation & Operation ManualTable 3H Approved Stainless Steel (S.S.) Terminations and AdaptersThe i

4 Sidewall direct ventingVent/air termination – sidewallTO BOILERINTAKE AIRCONNECTIONFROM BOILERVENT PIPECONNECTIONTERMINATIONPLATEBIRD SCREENGRADE O

Vent/air termination – sidewall 23 Installation & Operation ManualALTERNATE VENTING ARRANGEMENT(IF SPACE PERMITS)BIRDSCREEN12”MIN12” M

4 Sidewall direct venting 24 Installation & Operation ManualVENT PIPINGGALVANIZEDTHIMBLEVENT CAPAIR PIPINGWALL PLATEVENT PLATEVENTAIR

4 Sidewall direct venting (continued) 25 Installation & Operation Manual12" MIN. BETWEEN EDGE OF AIR INLET AND ADJACENT VENT OUT

4 Sidewall direct venting Sidewall termination – optional concentric vent Description and usageLochinvar offers optional concentric combustion air a

4 Sidewall direct venting (continued) Sidewall termination – optional concentric vent models Figure 4-9 2" and 3" Concentric Vent Dimens

28 Installation & Operation Manual4 Sidewall direct venting Sidewall termination – optional concentric vent Multiventing sidewall te

5 Vertical direct ventingVent/air termination – vertical ALTERNATE INTAKE LOCATIONS:INTAKE PIPES MAY BE LOCATEDANYWHERE WITHIN 24” OF VENTPIPEBIRD SC

Installation & Operation ManualPlease read before proceedingInstaller – Read all instructions, including this manual and the Knight Wall

5 Vertical direct venting 3. Space the air and vent holes to provide the minimum spacing shown in FIG. 5-1A, page 29.4. Follow all local codes for

5 Vertical direct venting (continued) Instead of cementing the smaller pipe to the rain cap, a field supplied stainless steel screw may be used to se

32 Installation & Operation ManualAlternate vertical concentric ventingVent / Air Inlet SizeMinimum Existing Vent / Chase Size2" 4

Installation & Operation Manual336 Hydronic pipingSystem water piping methodsThe Knight wall mount is designed to function in a close

Installation & Operation Manual346 Hydronic piping Near boiler piping components1. Boiler system piping: Boiler system piping MUST

Installation & Operation Manual35Near boiler piping connectionsAIRY-STRAINER(RECOMMENDED)DOMESTICHOT WATERPUMPCONDENSATEDRAINSYSTEMPUM

Installation & Operation Manual366 Hydronic piping -0.500.000.501.001.502.002.503.0002468101214FT/HDFLOW 55 850.001.002.003.004

6 Hydronic piping (continued) It is recommended that near boiler piping systems utilize Primary/Secondary configurations as shown in FIG.’s 6-3 th

38 Installation & Operation ManualBOILERINDIRECTDHW TANKDOMESTICHOT WATERCIRCULATORBACKFLOWPREVENTERPRESSUREREDUCING VALVEPRESSUREGAUGE

39 Installation & Operation ManualBOILERINDIRECTDHW TANKDOMESTICHOT WATERCIRCULATORANTI-SCALDMIXING VALVECOLD WATERINTEMPERATURE /PRESS

Installation & Operation Manual4The Knight Wall Mount Boiler - How it works...1. Stainless steel heat exchanger Allows system water to f

40 Installation & Operation Manual6 Hydronic piping BOILERINDIRECTDHW TANKDOMESTICHOT WATERCIRCULATORBACKFLOWPREVENTERPRESSUREREDUCIN

6 Hydronic piping (continued) INDIRECTDHW TANKBACKFLOWPREVENTERPRESSUREREDUCINGVALVEPRESSUREGAUGEANTI-SCALDMIXING VALVETEMPERATURE /PRESSUREGAUGEAIR

6 Hydronic piping Figure 6-7 Multiple Boilers - Single Temperature Zoned with Circulators - DHW PriorityINDIRECTDHW TANKBACKFLOWPREVENTERPRESSURERED

Installation & Operation Manual436 Hydronic piping (continued) BOILERINDIRECTDHW TANKDOMESTICHOT WATERCIRCULATORANTI-SCALDMIXING VA

Installation & Operation Manual446 Hydronic piping DOMESTICHOT WATERCIRCULATORANTI-SCALDMIXING VALVECOLD WATERINAIR SEPARATORBALL VAL

Installation & Operation Manual45BOILERINDIRECTDHW TANKDOMESTICHOT WATERCIRCULATORANTI-SCALDMIXING VALVECOLD WATERINTEMPERATURE /PRESSU

Installation & Operation Manual46BOILERINDIRECTDHW TANKANTI-SCALDMIXING VALVECOLD WATERINTEMPERATURE /PRESSUREGAUGEAIR SEPARATORBALL VA

Installation & Operation Manual47BOILERINDIRECTDHW TANKDOMESTICHOT WATERCIRCULATORBACKFLOWPREVENTERPRESSUREREDUCING VALVEPRESSUREGAUGEA

48 Installation & Operation Manual7 Gas connectionsConnecting gas supply piping1. Remove the front access panel and refer to FIG. 7-1

49 Installation & Operation Manual7 Gas connections (continued) Failure to apply pipe sealing compound as detailed in this manual ca

Installation & Operation Manual1711282210Front View IMG0016111174324268726133Left Side (inside unit) IMG00162272328161931301825533Right Si

50 Installation & Operation Manual7 Gas connections NominalIron PipeSize (Inches)Natural Gas Pipe Capacity ChartLength of Pipe in Stra

51 Installation & Operation Manual7 Gas connections (continued)  WARNINGWhen re-tightening the set screw, be sure to tighten securel

52 Installation & Operation Manual8 Field wiring ELECTRICAL SHOCK HAZARD – For your safety, turn off electrical power supply before ma

53 Installation & Operation Manual8 Field wiring (continued) Thermostat1. Connect the room thermostat or end switch (isolated conta

54 Installation & Operation Manual8 Field wiring Boiler management system1. An external control may be connected to control either th

55 Installation & Operation Manual8 Field wiring (continued) Figure 8-4 Low Voltage Field Wiring ConnectionsLOUVER RELAYTANK THERMOST

56 Installation & Operation Manual9 Condensate disposalCondensate drain1. This boiler is a high efficiency appliance that produces co

57 Installation & Operation Manual10 Start-upCheck/control water chemistryDo not use petroleum-based cleaning or sealing compounds in

58 Installation & Operation Manual10 Start-up Check for gas leaksBefore starting the boiler, and during initial operation, smell near

59 Installation & Operation Manual10 Start-up (continued) Final checks before starting the boiler Read the Knight Wall Mount Service

6 Installation & Operation ManualRatingsNotes:1. As an Energy Star Partner, Lochinvar has determined that Knight wall mount boilers m

60 Installation & Operation Manual10 Start-up

Installation & Operation Manual6110 Start-up (continued) Figure 10-3 Operating Instructions - Model 399

Installation & Operation Manual10 Start-up62Please note that the brackets ([]) denote screen status. NOTICE4. Place the boiler into

63 Installation & Operation Manual10 Start-up (continued) Set domestic hot water (DHW) operationVerify DHW modeThere are two (2) mod

Installation & Operation Manual11 Operating information GeneralHow the boiler operatesThe Knight wall mount boiler uses an advanced s

65 Installation & Operation Manual11 Operating information (continued) Ramp delayFor systems with lower flow, the SMART SYSTEM can lim

66 Installation & Operation Manual11 Operating information Monitor external limitsConnections are provided on the connection board for

67 Installation & Operation Manual11 Operating information (continued) DHW, Night Setback, and Ramp Delay operation with cascadeFor N

68 Installation & Operation Manual11 Operating informationSequence of operationOPERATION DISPLAY1. Upon a call for heat, the gas pres

69 Installation & Operation Manual11 Operating information (continued)Access modesUserThe user can adjust space heating and tank targe

Installation & Operation ManualThe Knight wall mount boiler gas manifold and controls met safe lighting and other performance criter

70 Installation & Operation ManualKnight wall mount boiler control moduleNAVIGATION DIALFigure 11-1 Control PanelUse the control panel

71 Installation & Operation Manual11 Operating information (continued)Status Display ScreensSection Display DescriptionA(Boiler Statu

72 Installation & Operation Manual11 Operating information Status Display Screens (cont’d)Section Display DescriptionC(Operational Inf

Installation & Operation Manual7311 Operating information (continued)Status Display Screens (cont’d)Section Display DescriptionD(LEFT

Installation & Operation Manual74Maintenance and annual startupTable 12A Service and Maintenance SchedulesService technician(see the f

Installation & Operation Manual12 Maintenance (continued) Follow the Service and maintenance procedures given throughout this manual

Installation & Operation ManualCheck expansion tank1. Expansion tanks provide space for water to move in and out as the heating syste

Installation & Operation Manual7712 Maintenance (continued) BURNERBURNERGASKETINSULATION,BURNER DOORGASKET,BURNER PLATEBURNER PLATEF

Installation & Operation Manual7813 DiagramsBOX DEPICTSOPTIONAL ITEMSLADDER DIAGRAMLBL20170 REV D120 VAC24 VAC120VACTERMINAL STRIP120

Installation & Operation ManualX1-7ON/OFFSWITCH1 2 345GRRWRTWBKYBLBLOWER-THIGH LIMIT SENSOR S1bOPERATING SENSOR S1aINLET SENSOR S2FLU

1/4" MINIMUM CLEARANCEAROUND HOT WATER PIPES1" MINIMUM CLEARANCEAROUND VENT PIPEOPEN FRONTLEFT0" MINIMUMRIGHT0" MINIMUMFRONT6"

Revision A (ECO #C06854) initial release.Revision B (ECO #C08222) reflects the changes to the water pipe clearances from 1" to a 1/4" (ECR #

Installation & Operation ManualProvide air openings to room:Knight wall mount boiler alone in boiler room1. No air ventilation openi