NTI VM110 Installation And Operation Instructions Manual
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NTI VM110 Installation And Operation Instructions Manual

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Vmax Boiler
Model Number: VM110, VM110P
Version Date: 2015-02-09
INSTALLATION AND OPERATION INSTRUCTIONS FOR
Vmax BOILER

TABLE OF CONTENTS

1.0
Introduction ................................................................................................................ 3
2.0
Specifications .............................................................................................................. 6
3.0
Boiler Location .......................................................................................................... 7
4.0
General Venting ....................................................................................................... 10
5.0
Vent/Air-Inlet Termination Clearances ..................................................... 22
6.0
Condensate Drain .................................................................................................... 25
7.0
Installing Gas Piping .............................................................................................. 27
8.0
Lighting The Boiler ................................................................................................. 29
9.0
Gas Valve And Burner Set-Up ............................................................................ 32
10.0 BOILER AND HEATING SYSTEM PIPING ................................................................... 35
11.0 DOMESTIC HOT WATER (DHW) PIPING .................................................................... 46
12.0 FIELD WIRING ................................................................................................................. 49
13.0 CASCADE INSTRUCTIONS ............................................................................................ 52
14.0 WIRING SCHEMATICS ................................................................................................... 54
15.0 INSTALLATION CHECKLIST ........................................................................................ 56
16.0 ANNUAL MAINTENANCE AND INSPECTION ........................................................... 57
17.0 DISPLAY MENU GUIDE ................................................................................................. 59
18.0 TROUBLESHOOTING ..................................................................................................... 71
19.0 PARTS LIST ...................................................................................................................... 74

HAZARD SYMBOLS AND DEFINITIONS

unit may result in property damage, serious injury to occupants, or possibly death.
Danger Sign: Indicates a hazardous situation which, if not avoided, will
result in serious injury or death.
Warning Sign: Indicates a hazardous situation which, if not avoided,
could result in serious injury or death.
Caution Sign plus Safety Alert Symbol: Indicates a hazardous situation
which, if not avoided, could result in minor or moderate injury.
Caution Sign without Safety Alert Symbol: Indicates a hazardous
situation which, if not avoided, could result in property damage.
Notice Sign: Indicates a hazardous situation which, if not avoided,
could result in property damage.
This Boiler must be installed by a licensed and trained Heating
Technician or the Warranty is Void. Failure to properly install this
NEW PRODUCT
Fire-tube Boiler
w/ Built-in Pump
H
NTI # 85171

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  • Page 1 Vmax Boiler NEW PRODUCT Fire-tube Boiler Model Number: VM110, VM110P w/ Built-in Pump Version Date: 2015-02-09 INSTALLATION AND OPERATION INSTRUCTIONS FOR Vmax BOILER TABLE OF CONTENTS INTRODUCTION ........................ 3 SPECIFICATIONS ......................6 BOILER LOCATION ......................7 GENERAL VENTING ....................... 10 VENT/AIR-INLET TERMINATION CLEARANCES .............
  • Page 2 │ Warnings Vmax I&O Manual Read Before Proceeding If you do not follow these instructions exactly, a fire or explosion may result causing property damage, serious injury or death. FOR YOUR SAFETY, READ BEFORE OPERATING_ A) This boiler does not have a pilot. It is equipped with an ignition device which automatically lights the burner.

  • Page 3: Introduction

    1.0 INTRODUCTION General Installation Requirements The installation of your NTI Vmax gas boiler must conform to the requirements of this manual, your local authority, and the National Fuel Gas Code ANSI Z223.1 and or CAN/CGA B149 Installation Codes. Where required by the Authority, the installation must conform to the standard for “Controls and Safety Devices for Automatically Fired Boilers ANSI/ASME CSD-1.”...
  • Page 4 84795 Exhaust Vent / Air-Inlet Piping The Vmax VM110 and VM110P are certified as a “Category IV” boiler, and require a “Special Venting System” designed for pressurized venting. The exhaust gases must be piped directly to the outdoors using the vent materials and rules outlined in these instructions. Failure to follow...
  • Page 5 │Introduction Vmax I&O Manual IN THE STATE OF MASSACHUSETTS ONLY (a) For all horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned and operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied: INSTALLATION OF CARBON MONOXIDE DETECTORS At the time of installation of the side wall...

  • Page 6: Specifications

    │ Specifications Vmax I&O Manual 2.0 SPECIFICATIONS Table 2-1 Vmax Specifications DESCRIPTION VM110 VM110P CSA Input Modulation 17 - 110 17 - 110 [MBH] DOE Heating Capacity [MBH] Net I=B=R Rating [MBH] DOE AFUE Boiler Water Connections – NPT [in.] 1”...

  • Page 7: Boiler Location

    Vmax I&O Manual 3.0 BOILER LOCATION In all cases, the Vmax VM110 & VM110P must be installed indoors in a dry location where the ambient temperature must be maintained above freezing and below 100F [38C]. All boiler components must be protected from dripping, spraying water, or rain during operation and servicing.

  • Page 8: Boiler Location

    │ Boiler Location Vmax I&O Manual Figure 3-1 Closet Installation, Minimum Clearances Min. 1” clearance for hot water and vent pipes Top ventilation opening Max. 6” below ceiling / top Top = 12” Ventilation air opening per 1000 Btu/hr, min. 100in Removable surface / closet door Ventilation air...
  • Page 9 │Boiler Location Vmax I&O Manual Figure 3-2 Wall Mounting Instructions  Failure to follow instructions may Leave the Top Wall-mount Bracket (A) intact result in fire, serious injury, or death. and remove the Bottom Wall-mount Bracket (B) that is attached to the bottom-back of the This unit requires two people to lift it boiler.

  • Page 10: General Venting

    Vmax I&O Manual 4.0 GENERAL VENTING The Vmax VM110 & VM110P are certified as a “Category IV” boiler requiring a “Special Venting System” designed for pressurized venting. The Exhaust Vent must be piped to the outdoors, using the vent materials and rules outlined in this section.
  • Page 11 │General Venting Vmax I&O Manual Flammable Solvents and Plastic Piping Due to the extremely flammable characteristics of most glues, cements, solvents and primers used in the process of joining plastic vent and air-inlet pipe, explosive solvent vapors must be evacuated from the vent and air-inlet prior to start-up.
  • Page 12 │ General Venting Vmax I&O Manual Stainless Steel Piping – The Vmax universal appliance adapter is designed to connect directly to DuraVent – FasNSeal AL29-4C Stainless Steel Special Gas Vent. Ensure the lower gasket of the universal appliance adapter is in place and properly positioned prior to installation. Ensure the venting system does not apply a load or strain on the boiler flue outlet adapter;...

  • Page 13: General Venting

    │General Venting Vmax I&O Manual Figure 4-3(a) VM110 & VM110P Figure 4-3(b) VM110 & VM110P Near Boiler Venting (PVC) Near Boiler Venting (CPVC) Swing Joint to attain slope in horizontal runs PVC Air Inlet Pipe* Swing Joint to attain slope in horizontal runs...
  • Page 14 │ General Venting Vmax I&O Manual Vent/Air-inlet Pipe Material Table 4-2 Approved Vent and Air-Inlet Pipe Material Venting System Standards 2, 3 Items Materials United States Canada PVC - DWV ANSI/ASTM D2265 Vent Air-Inlet materials installed on gas PVC Schedule 40 ANSI/ASTM D1785 Vent Piping All venting material in...
  • Page 15 Vmax I&O Manual Termination Options – Direct Vent Installation The venting system of the VM110 and VM110P may be terminated using field supplied piping to construct a “Two-Pipe” termination, see Figures 4-4(a), 4-5(a), 4-5(d), 4-6(a), 4-7(a) and 4-7(d); alternatively the venting may be terminated using a factory kit selected from Table 4-4.
  • Page 16 │ General Venting Vmax I&O Manual Sidewall Venting Options – Direct Vent Installation Figure 4-4(a) Figure 4-4(b) Two-pipe Termination (Sidewall) Low Profile Termination (Sidewall) 3” IPEX Low Profile Termination Exhaust must terminate a minimum of 18” above Air-inlet illustrated; see Figure 4-6(c) for termination;...
  • Page 17 │General Venting Vmax I&O Manual Roof Venting Options – Direct Vent Installation Figure 4-5(a) Figure 4-5(b) Two-pipe Termination (Roof) Two-pipe Termination (Roof-exhaust / Sidewall-inlet) Exhaust must terminate a Exhaust must terminate a minimum of 18” above the Air- minimum of 12” above snow inlet termination;...
  • Page 18 │ General Venting Vmax I&O Manual Sidewall Termination Details – Direct Vent Installation Figure 4-6(a) Figure 4-6(b) Two-Pipe Termination (Sidewall) IPEX Concentric Termination (Sidewall) Horizontal 4-12” or greater than 36” Refer to documentation included with termination kit for complete installation instructions. Exhaust Exhaust Exhaust...
  • Page 19 │General Venting Vmax I&O Manual  Roof Termination Details – Direct Vent Installation Figure 4-7(a) Figure 4-7(b) Two-Pipe Termination (Roof) IPEX Concentric Termination (Roof) Exhaust Refer to documentation included with termination kit for Vent Screen complete installation instructions. Vent pipe piece to retain vent screen Vent pipe piece to retain vent screen...
  • Page 20 Combustion air containing chemicals such as chloride, fluoride, bromine or iodine or dust and debris will cause corrosion damage of the heat exchanger voiding your NTI warranty. Refer to Table 4-1 for a list of corrosive products and contaminants sources to avoid.
  • Page 21 │General Venting Vmax I&O Manual Figure 4-8 Venting Below Grade For installations that exit the wall below grade: Exhaust 1. Excavate site to a point below where the pipes are to exit as shown. 2. Ensure the wall is fully sealed where the pipes penetrate.

  • Page 22: Vent/Air-Inlet Termination Clearances

    │ Termination Clearances Vmax I&O Manual 5.0 VENT/AIR-INLET TERMINATION CLEARANCES The quick reference table below is to be read in conjunction with the numbered notes as indicated, Figures 5-1 and 5-2, and the Venting Rules and Guidelines in Section 4.0. The instructions detailed in this section are a combination of Vmax specific and National Gas Code restrictions.
  • Page 23 │Termination Clearances Vmax I&O Manual Figure 5-1 Termination Clearance Quick Reference Diagram (See Table 5-1) Illustrations of Termination Clearances Figure 5-2 Sidewall Termination (See Table 5-1) Clearances “F” and “G” Canada – Minimum 3 ft. [915 mm] The US – Minimum 1 ft. [305 mm] Two-Pipe Termination Clearance “Q”...
  • Page 24 Removing an Existing Boiler from Common Venting System Do not install the Vmax VM110 or VM110P into a common venting system with any other boiler. Failure to comply with this warning will cause flue gas spillage and leech carbon monoxide emissions into the surrounding air resulting in serious injury or death.

  • Page 25: Condensate Drain

    │Condensate Drain Vmax I&O Manual 6.0 CONDENSATE DRAIN The Vmax boiler produces liquid condensate in the heat exchanger and venting system as a product of combustion. Steps must be taken to ensure condensate does not collect in the venting system; therefore, all exhaust piping must slope back to the boiler a minimum ¼...
  • Page 26 Condensate Drain│ Vmax I&O Manual Figure 6-1 Condensate Drain Piping  Inspect Condensate Trap assembly Boiler Condensate Drain Gear Clamp (factory supplied) Condensate Trap (factory supplied)  Attach to Boiler Condensate Drain Tighten gear clamps and pull down on Condensate Trap to test secureness ...

  • Page 27: Installing Gas Piping

    Ensure that:  The gas line connection to the boiler does not apply any weight to the gas valve. NTI recommends using approved flexible gas piping (if acceptable by local codes) to connect the boiler to the gas supply (see Figure 7-1 for details).
  • Page 28 Lighting the Boiler│ Vmax I&O Manual Figure 7-1 Gas Line Connection (Typical) Flexible Gas Line Piping Recommended to eliminate strain on the boiler gas components (only use if acceptable by local codes). Manual Gas Shutoff Valve Should overheating occur or the gas supply fails to shutoff, close the Manual Gas Shutoff Valve to the boiler.

  • Page 29: Lighting The Boiler

    │Lighting the Boiler Vmax I&O Manual 8.0 LIGHTING THE BOILER Before Start-up refer to Mandatory Pre-commissioning Procedure for Plastic Venting in Section 4.0. Failure to follow these instructions can result in explosions, injury or death. Prior to turning the gas supply on and lighting the boiler, ensure all aspects of the installation are complete and in conformance with the instructions provided in this manual, including the Vent/Air-inlet, Condensate Drain, and System Water Piping.
  • Page 30 “de-Air” is no longer displayed on the screen; see Section 17.0 for more details. 1. Turn on power to the Vmax VM110 or VM110P and turn-up the Thermostat(s). The boiler should run through a purge, and combustion should occur. (The control system has a built-in ignition retry, allowing the system to try at least five times, before locking-out.)
  • Page 31 │Lighting the Boiler Vmax I&O Manual Turning Off the Boiler 1. Set the thermostat to the lowest setting, and then turn off all power to the boiler. 2. Turn the gas shutoff valve to the off position.

  • Page 32: Gas Valve And Burner Set-Up

    Gas Valve and Burner Set-up Vmax I&O Manual 9.0 GAS VALVE AND BURNER SET-UP Vmax VM110 & VM110P Set-up of the gas valve must be performed by a licensed Gas Technician. Failure to perform the set-up correctly may result in incorrect operation, component failure, property damage, serious injury or death.
  • Page 33 Flue Gas Analysis and Adjustment Each Vmax VM110 & VM110P are factory set to operate with Natural Gas, for boilers field converted to operate with Propane Gas, a flue gas analysis and adjustment is mandatory. See Table 7-1 and Propane conversion instructions.
  • Page 34 │ Gas Valve and Burner Set-up Vmax I&O Manual Figure 9-1 Gas Valve and Venturi Assembly Line Pressure Test Port Throttle / Input Adjustment Screw Gas Valve Manifold Pressure Test Port DO NOT Adjust Venturi...

  • Page 35: Boiler And Heating System Piping

    BOILER AND HEATING SYSTEM PIPING The fire tube design of the Vmax VM110 & VM110P heat exchanger results in minimal head loss, however it must be considered when sizing system piping and circulators. Furthermore, the low mass of the Vmax heat exchanger requires a minimum flow rate anytime the burner is operating.
  • Page 36 Near Boiler Plumbing (Central Heating) Pressure Relief Valve - A Pressure Relief Valve is factory supplied with each unit. Vmax VM110 and VM110P boilers have a maximum allowable operating pressure of 30 PSI. The pressure relief valve must be installed in the vertical position, as illustrated in Figures 10-1, 10-2(a), 10-2(b) and 10-3(a), with the drain pipe outlet exiting the side of the pressure relief valve horizontally.

  • Page 37: Field Wiring

    │Field Wiring Vmax I&O Manual Near Boiler Piping (Central Heating – CH) Figure 10-2(a) VM110 Top – Option A Figure 10-2(b) VM110 Top – Option B Auto Air Vent Auto Air Vent (factory supplied) (factory supplied) 1x1/2x1” Brass Tee 1x1/2x1” Brass Tee...
  • Page 38 │ Field Wiring Vmax I&O Manual Figure 10-3(a) VM110P (Plus) Top Auto Air Vent (factory supplied) 30 PSI Relief Valve (factory supplied) 3/4x1/2x3/4” Brass Tee (factory supplied) 3/4” Brass Street Elbow (factory supplied) 150 PSI T&P Relief Valve (factory supplied) Figure 10-3(b) VM110P (Plus) Bottom DHW Out Boiler Outlet...
  • Page 39 1. DHW PUMP - operates during a Domestic Hot Water demand (DHW). The DHW PUMP output is not used on VM110P (Plus) models. 2. CH PUMP - operates during a Central Heat demand (CH). The VM110 internal pump is factory wired to the CH PUMP output.
  • Page 40 Pressure Relief Valve resulting in property damage or personal injury. Indirect Fired Water Heater (IWH) – If installing an IWH with a VM110, there are various installation options to be considered, consult Figures 10-2 and 10-5 through 10-7 for specific examples. The Vmax VM110P (Plus) incorporates an IWH, one cannot be installed external to the unit.
  • Page 41 │Field Wiring Vmax I&O Manual Figure 10-5 VM110 Plumbing Schematic – Single CH Pump w/ Indirect Fired Water Heater (Option A) Figure illustrates the basic plumbing requirements for a VM110 boiler installation with a single Central Heating circulator, and an Indirect Fired Water Heater installed using Option A.
  • Page 42 │ Field Wiring Vmax I&O Manual Figure 10-6 VM110 Plumbing Schematic – Single CH Pump w/ Indirect Fired Water Heater (Option B) Figure illustrates the basic plumbing requirements for a VM110 boiler installation with a single Central Heating circulator, and an Indirect Fired Water Heater installed using Option B.
  • Page 43 │Field Wiring Vmax I&O Manual Figure 10-7 VM110 Plumbing Schematic – Multiple CH Pumps w/ Indirect Fired Water Heater Figure illustrates the basic plumbing requirements for a VM110 boiler installation with multiple Central Heating circulators, and an Indirect Fired Water Heater.
  • Page 44 │ Field Wiring Vmax I&O Manual Figure 10-8 VM110P (Plus) Plumbing Schematic – Single CH Pump Figure illustrates the basic plumbing requirements for a VM110P boiler installation with a single Central Heating circulator. Refer to Figures 10-3(a) and 10- 3(b) for boiler fitting identification.
  • Page 45 │Field Wiring Vmax I&O Manual Figure 10-9 VM110P (Plus) Plumbing Schematic – Multiple CH Pumps Figure illustrates the basic plumbing requirements for a VM110P boiler installation with multiple Central Heating circulators. Refer to Figures 10-3(a) and 10- 3(b) for boiler fitting identification.

  • Page 46: Domestic Hot Water (Dhw) Piping

    │ Field Wiring Vmax I&O Manual 11.0 DOMESTIC HOT WATER (DHW) PIPING DHW Description of Operation The VM110P (Vmax Plus) incorporates a Stainless Steel 16 gallon DHW storage tank with an internal Stainless Steel heat exchanger coil (i.e. an Indirect Fired Hot Water Heater). This allows the Vmax Plus to heat DHW without the need for a separate water heater.
  • Page 47 │Field Wiring Vmax I&O Manual Safe Temperatures for Potable Water Two factors used to determine safe hot water temperatures are Legionella and scalding. Potable water needs to be stored at temperatures hot enough to limit the growth of Legionella, yet be cool enough to prevent scalding. Since both hazards present a potential risk to the user, they must be monitored and controlled.
  • Page 48 │ Field Wiring Vmax I&O Manual Legislation and Guidelines - At the time this document was written, standards and guidelines regulating the prevention of Legionella in the United States and Canada were mostly voluntary. The American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE) is currently in the process of converting its guideline entitled "Minimizing the Risk of Legionellosis Associated with Building Water Systems"...

  • Page 49: Field Wiring

    Figure 12-2 and Table 12-1. Fuse (120VAC) - The Vmax VM110 & VM110P are equipped with a 3.15 Amp fuse located at “F1” on the boiler controller at the top left; the fuse protects all 120VAC circuits within the boiler, as well as any circulators connected to it.
  • Page 50 Tank Thermostat / Sensor – Connect the contacts of a DHW Tank Thermostat, or leads of an approved DHW Tank Sensor (NTI P/N: 84632), to terminals 3 and 6. When using a Thermostat, set DHW mode = 2 (menu setting 2-08). When using a Sensor, set DHW mode = 1.
  • Page 51 │Field Wiring Vmax I&O Manual Figure 12-2 Field Wiring...

  • Page 52: Cascade Instructions

    CASCADE INSTRUCTIONS The Vmax controller has the internal capacity to cascade (lead-lag / stage) up to 16 VM110 boilers, without the use of an external controller. Use the instructions detailed in this section to set-up and install the cascade system.
  • Page 53 Vmax I&O Manual System Sensor – install a system sensor (NTI P/N: 84010) on the outlet (supply) pipe feeding the heating system, see Figure 13-1. ire the system sensor to terminals 3 and 4 of the Managing Boiler (left boiler in illustration).

  • Page 54: Wiring Schematics

    │ Wiring Schematics Vmax I&O Manual 14.0 WIRING SCHEMATICS Figure 14-1 Vmax Connection Diagram...
  • Page 55 │Wiring Schematics Vmax I&O Manual Figure 14-2 Vmax Ladder-Logic Diagram...

  • Page 56: Installation Checklist

    │ Wiring Schematics Vmax I&O Manual 15.0 INSTALLATION CHECKLIST Installation  1. If operating on Propane Gas, convert boiler using appropriate conversion orifice. See Table 7-1.  2. Locate the boiler in accordance with Section 3.0 of this manual.  3. Install the Vent/Air-inlet piping in accordance with Sections 4.0 and 5.0 of this manual. Ensure all joints are secured and cemented properly.
  • Page 57 Combustion Chamber Cleaning Procedure NTI recommends having the combustion chamber cleaned after the first year of operation, with subsequent cleanings scheduled based on the condition of the combustion chamber at the time of the first cleaning. Units operating with LP Gas or in an industrial environment may require more frequent cleanings.
  • Page 58 Vmax I&O Manual Annual Maintenance and Inspection Refractory Ceramic Fibers (RFC) Personal Protective Equipment Recommended - Read the following warnings and handling instructions carefully before commencing any service work in the combustion chamber. The insulating material on the inside of the burner plate contains Refractory Ceramic Fibers and should not be handled without personal protective equipment.
  • Page 59 │Display Menu Guide Vmax I&O Manual 17.0 DISPLAY MENU GUIDE Initial Power-up Immediately following power-up of the boiler, the display reads, “conn”, indicating it is connecting to the controller; this is followed by a momentary reading of the display software version, e.g. init d349. After which the controller performs a de-air sequence that is designed to purge air from the boiler water.
  • Page 60 │ Display Menu Guide Vmax I&O Manual Figure 17-2 Control Console – Main Screen Water pressure Temperature units Water pressure units Boiler outlet temperature Faucet – flashes OD reset indicator – during DHW demands illuminates when OD Radiator – flashes sensor is enabled during CH demands No flame –...
  • Page 61 1-14 sensor, NTI P/N: 84010. When used, the system sensor is only wired to the managing boiler, i.e. boiler with S4 switch set to on, and boiler address (Installer Menu setting 2-20) set to 1. NOTICE: an open circuit is displayed as “OPEn”;...
  • Page 62 │ Display Menu Guide Vmax I&O Manual Installer Menu The Installer Menu allows access to all settings for adjustment, as well as viewing of statistical data for troubleshooting. Access the Installer Menu from any screen by pressing the MENU and OK buttons simultaneously until “2-01”...
  • Page 63 136⁰F Plus (VM110P) must have DHW mode = 1, i.e. Tank sensor. Range = 104-190⁰F DHW mode – determines the operational mode for DHW; for VM110 model choose between options 2-08 0, 1 and 2; for VM110P model choose between options 0 and 1: ...
  • Page 64 │ Display Menu Guide Vmax I&O Manual Factory Setting Description Setting Maximum firing rate DHW – allows the installer to decrease the maximum modulation/firing rate of 2-14 the boiler when operating on a domestic hot water demand; this may be necessary for troubleshooting 100% or de-rating the boiler for operation with glycol.
  • Page 65 │Display Menu Guide Vmax I&O Manual Lockout & Error History The Vmax controller stores in its memory the 16 most recent Lockouts (Loc) and Blocking Errors (Err); these errors can be accessed from the Installer Menu via settings 2-34 (Lockout History) and 2-35 (Blocking Error History).
  • Page 66 │ Display Menu Guide Vmax I&O Manual Figure 17-5(c) Lockout and Error History Navigation (End) End – indicates that you have reached the end of the recorded lockout or error messages. OK button – press to exit the 2-34 or 2-35 History submenu.

  • Page 67: Display Menu Guide

    │Display Menu Guide Vmax I&O Manual Figure 17-7 Blocking Error Navigation Err – indicates the boiler has a blocking Error code - see Table error. 17-3 for description. Installer Menu – press and hold MENU and OK buttons to view User Menu –...
  • Page 68 If power is being supplied by a generator, install an appropriately sized UPS (Uninterruptible Power Supply). Controller Malfunction – contact NTI, check field wiring, replace controller. Loc 8-9 Supply Sensor Fault – controller has sensed an invalid reading at the Supply/Outlet sensor; check cable, Loc 10 then replace sensor [see Figure 19-1(a), item 15].
  • Page 69 Faulty Earth Ground – check grounding of boiler and power supply; replace controller. Err 67 Controller Malfunction – contact NTI, check field wiring, replace controller. Err 68-71 Supply Sensor Open – check wiring to supply sensor; replace sensor [see Figure 19-1(a), item 15].
  • Page 70 Vmax I&O Manual Controller Replacement Instructions This section provides important information necessary to successfully replace the boiler controller, NTI P/N 84712, in the event the original controller fails. The replacement controller must be field configured to operate on the Vmax boiler model it is being installed on. This is achieved by adjusting the controller’s Appliance Type setting.

  • Page 71: Troubleshooting

    (Installer Menu setting 2-09). 3) Display Normal but no DHW – perform the following steps:  VM110 and Indirect Tank with Tank Sensor, or VM110P: o Verify DHW Mode is set to 1 (Installer Menu setting 2-08). o Verify there is a Tank sensor wired to COMMON and DHW (boiler terminals 3 and 6), see Figure 12-2.
  • Page 72 Indirect Tank with Tank Thermostat (DHW Mode = 2) – recommended setting = 160 to190ºF.  Vmax VM110P – DHW flow rate is too great; NTI does not recommend exceeding 4 GPM. If necessary, restrict overall DHW flow rate.
  • Page 73 │Troubleshooting Vmax I&O Manual Only replace Vmax VM110 & VM110P controller fuse with identical part (LFT 3.15A, 250V “slow-blow”). Failure to follow this warning may result in component failure or property damage. Figure 18-1 Vmax Fuse Location (Display Assembly Removed for Illustration Purposes)

  • Page 74: Parts List

    │ Parts List Vmax I&O Manual 19.0 PARTS LIST For a list of parts that corresponds to the item numbers in the callouts, refer to Table 19-1. Note that some item numbers may appear more than once in the parts list depending on which model number is being referenced. Building Owners - Replacement parts are available from your stocking wholesaler.
  • Page 75 │ Vmax I&O Manual Parts List Figure 19-1(b) VM110 Heat Exchanger, Water Piping & Sensors Figure 19-1(c) Vmax Gas Train...
  • Page 76 │ Parts List Vmax I&O Manual Figure 19-1(d) Vmax Cabinet & Controls (VM110P illustrated)
  • Page 77 Each Vmax comes with an LP (Propane) VM110 Conversion Kit, containing the required LP orifice, decal and converions instructions. Common (VM110 & VM110P) Natural Gas to LP Conversion Kit VM110P Table 19-1 Parts List: Vmax Series Model Item Part #...
  • Page 78 VM110 Circulator Inlet/Outlet Gasket, VM110 85113 VM110 Circulator Check Valve, VM110 84918 VM110, VM110P Fuse, LFT 3.15, 250V Bushing, Brass, 1 x ¾” NPT, VM110 82869 VM110 VM110, VM110P Control Panel Sheet Metal 81027-1 VM110, VM110P Outdoor Sensor Front Cover, VM110P...
  • Page 79 Description Back, VM110P VM110P VM110 Back / Bottom, VM110 Tee, Brass, ¾ x ½ x ¾”, VM110P 85116 VM110P Tee, Brass, 1 x ½ x 1”, VM110 84466 VM110 VM110P Bottom, VM110P 83135 VM110, VM110P Hose Clamp, 9/16 to 1-1/16”...
  • Page 80 NY Thermal Inc. 30 Stonegate Drive, Saint John, NB E2H 0A4 Canada Technical Assistance: 1-800-688-2575 Website: www.nythermal.com Fax: 1-506-432-1135...

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