Bradford White FT Series Installation And Operation Instruction Manual
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Bradford White FT Series Installation And Operation Instruction Manual

Wall-mounted modulating condensing gas boiler (includes optional floor stand accessory information)
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Installation and Operation Instructions
FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician,
qualified in hot water boiler and heater installation and maintenance. Improper installation and/or operation
could create carbon monoxide gas in flue gases which could cause serious injury, property damage, or
death. Improper installation and/or operation will void the warranty.
If the information in this manual is not
followed exactly, a fire or explosion may
result causing property damage, personal
injury or loss of life.
Do not store or use gasoline or other
flammable vapors and liquids in the vicinity of
this or any other appliance.
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not
use any phone in your building.
• Immediately call your gas supplier from a
nearby phone. Follow the gas supplier's
instructions.
• If you cannot reach your gas supplier, call
the fire department.
Installation and service must be performed
by a qualified installer, service agency, or gas
supplier.
Installation and Operation
Instructions for
Wall-Mounted Modulating Condensing
Gas Boiler (Includes Optional Floor
Stand Accessory Information)
Model FTHW301 and FTHW399
•
•
WARNING
Natural Gas (NG) - Factory Configuration
Propane Gas (LP) - Field-Convertible
Assurez-vous de bien suivres les instructions
données dans cette notice pour réduire au
minimum le risque d'incendie ou d'explosion
ou pour éviter tout dommage matériel, toute
blessure ou la mort.
Ne pas entreposer ni utiliser d'essence ou ni
d'autres vapeurs ou liquides inflammables dans
le à proximité de cet appareil ou de tout autre
appareil.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE
• Ne pas tenter d'allumer d'appareils.
• Ne touchez à aucun interrupteur. Ne pas vous servir
des téléphones dans le bâtiment où vous vous
trovez.
• Appelez immédiatement votre fournisseur de
gaz depuis un voisin. Suivez les instructions
du fournisseur.
• Si vous ne pouvez rejoindre le fournisseur de
gaz, appelez le sservice des incendies.
L'installation et l'entretien doivent être assurés par
un installateur ou un service d'entretien qualifié
ou par le fournisseur de gaz.
Document 1538
AVERTISSEMENT
GAZ:

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Summary of Contents for Bradford White FT Series

  • Page 1 Installation and Operation Instructions Document 1538 Installation and Operation Instructions for Wall-Mounted Modulating Condensing Gas Boiler (Includes Optional Floor Stand Accessory Information) Model FTHW301 and FTHW399 • Natural Gas (NG) - Factory Configuration • Propane Gas (LP) - Field-Convertible FOR YOUR SAFETY: This product must be installed and serviced by a professional service technician, qualified in hot water boiler and heater installation and maintenance.

  • Page 2: Table Of Contents

    Page 2 TABLE OF CONTENTS 4.16.2 Floor stand application: Zoning with zone valves SECTION 1 Introduction ..........3 and indirect DHW tank pump.......44 About this Installation Manual ........3 4.16.3 Cascade system with separate control of space Included in the Box ..........4 heating and DHW heating.

  • Page 3: Section 1 Introduction

    The FT Series 301 / 399 Heating Only Boiler Page 3 SECTION 1 Introduction About this For details on Plumbing for Installation Manual Central Heat (page 40 to page 51) For details on Combustion Air and Venting, (pages 17-29) For details on Gas...

  • Page 4: Included In The Box

    Page 4 Included in the Box Item Description Item Description Installation and Operating Wall Mounted Manual Heating Only Boiler Package, Two Mesh Package, Screens 3” Dia. Outdoor Sensor and Silicone tubing for air relief on condensate trap, velcro Propane strap and Conversion Kit condensate hose with Orifice and...

  • Page 5: Section 2 Product Characteristics

    The FT Series 301 / 399 Heating Only Boiler Page 5 SECTION 2 Product Characteristics Model Number / Model Number Rating Plate The Model Number is shown on your Rating Plate and consists of a series of letters and numbers (Nomenclature) that further identifies the characteristics of your FTHW Heating Only Boiler.

  • Page 6: Specifications

    Page 6 Specifications 2.3.1 Specifications, 301 FTHW301NX Model Name 301,000 Btu/h Gas Input Rate 39,900 Btu/h Indoor / Wall-mounted or floor (requires floor stand) Installation boiler Sealed Combustion Direct / Single Vent / Concentric Flue System Vent 3”(65 ft), 4” (150 ft) Schedule 40 CPVC, PP, PVC, Vent Run Stainless Steel, PP Flex 6.55 mm (0.258”)

  • Page 7: Specifications, 399

    The FT Series 301 / 399 Heating Only Boiler Page 7 2.3.2 Specifications, 399 FTHW399NX Model Name 399,000 Btu/h Gas Input Rate 39,900 Btu/h Installation Indoor / wall-mounted or Floor (requires floor stand) Sealed Combustion Direct / Single Vent / Concentric...

  • Page 8: Names Of Components

    Page 8 Names of Components Item # Description Boiler Return Connection Boiler Supply Connection Vent Pipe Collar Combustion Test Port Air Intake Collar Air Intake Screen Gas Inlet Connector Supply Gas Pressure Test Port Blower Air/Gas Venturi Air Intake Attenuator Gas Valve Internal Exhaust Pipe Sensor, Flue Gas Temperature...

  • Page 9: Product Flow Paths And Characteristics

    The FT Series 301 / 399 Heating Only Boiler Page 9 Product Flow Paths and Characteristics 2.5.1 Central Heating flow. Boiler Heating Mode. This boiler has top and bottom return and supply water connections. Place the combo brass adaptor fitting on the upper left supply connection. Use at least one of the CH return and CH supply connections.

  • Page 10: Section 3 Safety Regulations

    Page 10 SECTION 3 Safety Regulations Safety Symbols WARNING WARNING To avoid product damage, personal injury, or even FOR YOUR SAFETY READ BEFORE possible death, carefully read, understand, and OPERATING follow all the instructions in the Installation and Operation manual before installation, operation If you do not follow these instructions exactly, a and service the Boiler.

  • Page 11: Safety Precautions And Proper Use

    The FT Series 301 / 399 Heating Only Boiler Page 11 Safety Precautions and Proper Use of the unit. Boiler must be checked by a qualified technician before resuming operation. DO NOT use this Boiler if any part has been under water.
  • Page 12 Page 12 Before Operation WARNING Do not use the appliance for any other purpose Note: FTHW301/399 is factory built for Natural Gas. than for space heating and DHW heating using an For use with LP(Propane), refer to Section 4.15 indirect water heater tank. Natural Gas to Propane Conversion.

  • Page 13: Section 4 Installation

    The FT Series 301 / 399 Heating Only Boiler Page 13 SECTION 4 Installation WARNING The K1 Series Floor Standing and Wall Mounted, Heating Only Boiler Page 13 ▪ Installations must comply with • All the local, state, provincial, and national codes, laws, NOTE: For Cascading Installations, regulations and ordinances.

  • Page 14: Wall Mount Bracket

    Page 14 4.1.1 Wall Mount Bracket 4.1.2 Mounting Location Preparation Hangers on the back of the boiler with the knife edge The installation height and location for your FT of the Wall Mount Bracket, and hang the boiler onto depends on your installation scenario. With all the Wall Mount Bracket.

  • Page 15: Location And Clearances For Boiler

    The FT Series 301 / 399 Heating Only Boiler Page 15 Location and Clearances for Boiler WARNING with Optional Floor Stand (Part #: 4AC1000) Installations must comply with • All the local, state, provincial, and national codes, The boiler must be installed on a level surface of laws, regulations and ordinances.

  • Page 16: Flooring & Leveling

    Page 16 4.2.1 Flooring & Leveling : Installing the FTHW301/399 on the floor. WARNING Make sure that the floor and structure of the installation location are sufficient to support the full installed weight of the boiler, including water content of the heat exchanger and related piping. Failure to ensure the floor and structure of the installation location are structurally sound before installation of the boiler can result in structural failure, substantial property damage, severe personal injury, or death.

  • Page 17: Combustion Air

    The FT Series 301 / 399 Heating Only Boiler Page 17 Combustion Air FTHW 301/399 boilers must have provisions for vertical or horizontal duct to the outdoors or spaces combustion and ventilation air in accordance with the that directly communicate with the outdoors and shall...
  • Page 18 Page 18 NOTICE AVIS The instructions for the installation of the venting Les instructions d'installation du système system shall specify that the horizontal portions of d'évacuation doivent préciser que les sections the venting system shall be supported to prevent horizontales doivent être supportées pour prévenir sagging;...

  • Page 19: Venting (Exhaust)

    The FT Series 301 / 399 Heating Only Boiler Page 19 Venting (Exhaust) WARNING All venting must be installed according to this NOTICE manual and any other applicable local codes, DO NOT COMMON VENT FT UNITS WITH including but not limited to, ANSI Z223.1/NFPA OTHER MAKES OF BOILERS.

  • Page 20: General Location Guideline

    Page 20 4 . Venting system components can only WARNING be mixed with alternate manufacturers’ Failure to vent this Boiler in accordance with these certified components when clearly listed instructions could cause a fire, resulting in severe in the Boiler manufacturers Installation property damage, personal injury or death.

  • Page 21: Locations For Vent Pipe Terminator

    The FT Series 301 / 399 Heating Only Boiler Page 21 Locations for Vent Pipe Terminator Canadian Installations U.S. Installations A = Clearance above grade, veranda, porch, deck, or balcony B = Clearance to window or door that may be ●...

  • Page 22: Venting Requirements In The Commonwealth Of Massachusetts

    Page 22 4.6.1 Venting Requirements in the Commonwealth of Massachusetts Inspection The state or local gas inspector of the In Massachusetts the following items are required if side-wall horizontally vented gas fueled appliance shall the side-wall exhaust vent termination is less than not approve the installation unless, upon inspection, seven (7) feet above finished grade in the area the inspector observes carbon monoxide detectors and...

  • Page 23: Common Vent Test

    The FT Series 301 / 399 Heating Only Boiler Page 23 Common Vent Test NOTE: This section does not describe a method for common venting FT units. It describes what must be done when an existing unit is removed from a common vent system.

  • Page 24: Air Supply And Vent Connections

    Page 24 Air Supply and Vent Connections 4.8.1 Vent / Air Pipe Lengths for dual pipe venting systems. 3” Combustion Air or Vent Pipe 4” Combustion Air or Vent Pipe Min. Min. Max. Min. Min. Max. Combustion Air Vent Combustion Combustion Air Vent Combustion...

  • Page 25: Indoor Combustion Air

    The FT Series 301 / 399 Heating Only Boiler Page 25 Indoor Combustion Air Short pipe shown is not required. Included 3” PVC Screen fits coupler hub size 3.5” ID. Read and follow section 4.5.1 Guidelines first. 1. Insert the termination end cap into the intake air duct.

  • Page 26: Horizontal Vent Termination

    Page 26 Vent / Air Pipe Terminations (continued) 4.10.2 Horizontal Vent Termination (Direct Vent - Sidewall Termination) Note: For cases Exterior Wall A thru C below, Vent Screens are required the location of the exhaust terminal MUST 1” MIN Exhaust be downstream Elbow 12”...

  • Page 27: Low Profile Two-Pipe Sidewall Venting

    The FT Series 301 / 399 Heating Only Boiler Page 27 4.10.3 Low Profile Two-Pipe Sidewall Venting NOTICE Exhaust Follow the manufacturer’s installation guidelines (from appliance) included with the Low Profile Vent Termination Kit for installation requirements and guidelines. Failure to provide properly separated...

  • Page 28: Flexible Vent Systems

    Page 28 4.10.4 Flexible Vent Systems Using flexible polypropylene in an existing vertical chimney. NOTE : Only VERTICAL installations are allowed. Horizontal terminations are prohibited. The use of proper adapters and supports are required to fully complete the installation. The following table lists the flexible vent models that are approved for use with this appliance in addition to the maximum allowable vent lengths for the desired vent system.

  • Page 29: Concentric Vent Termination

    The FT Series 301 / 399 Heating Only Boiler Page 29 Exter • Direct Vent - Optional Side wall Terminations 4.10.5 Concentric Vent Termination • Direct Vent - Optional Horizontal Exterior Wall Side Wall Kit and Vertical Concentric Vent using 3” or 4”...

  • Page 30: Gas Supply And Piping

    Page 30 4.11 Gas Supply and Piping Schedule 40 Metal Pipe Capacity for Gas piping should be supported by suitable hangers or 1.6 Specific Gravity Undiluted Propane floor stands, near the appliance. Nominal Pipe Size @ 11” W.C. Inlet Review the following instructions before proceeding with and 0.5”...
  • Page 31 The FT Series 301 / 399 Heating Only Boiler Page 31 Gas Supply and Piping (continued) The manual gas shut-off valve in the gas supply The gas connection fitting is, 1” male NPT. line should be installed close to the unit as shown The FT boiler is standard equipped with top and below.
  • Page 32 Page 32 Suggested Natural Gas (NG) Layout NOTE: Total gas supply capacity must not be less than the total demand capacity of the connected appliances. Gas Regulator (Supply Press 12˝ ) Suggested Propane Gas (LP) Layout NOTE: Total gas supply capacity must not be less than the total demand capacity of the connected appliances.

  • Page 33: Gas Supply Pressure

    The FT Series 301 / 399 Heating Only Boiler Page 33 4.12 Gas Supply Pressure Supply Gas INLET port Manifold/Offset Do Not Adjust without using a combustion analyzer to verify adjustment. Adjust ONLY when in MIN Fire and when using a combustion analyser.

  • Page 34: Adjusting Combustion

    Page 34 4.13 Adjusting Combustion 1. Remove the front cover by opening the four clips Note: When in Low Fire the burner should remain on the boiler front cover - (2 top, 2 bottom) pick up on. If the flame dies out after a few seconds while in the cover and lift the cover off.

  • Page 35: High Altitude Installations. 2,000' To 10,000

    The FT Series 301 / 399 Heating Only Boiler Page 35 Adjusting Combustion (continued) Manifold Pressure Natural Gas Liquid Propane 3” VENT 4” VENT 3” VENT 4” VENT Max Fire -0.28” WC -0.28” WC -0.28” WC -0.28” WC FTHW301 Min Fire -0.015”...

  • Page 36: Natural Gas To Propane Conversion

    Page 36 4.15 Natural Gas to Propane Conversion Squeeze the release button to unlatch the clasp The FTHW301 and FTHW399, condensing boilers are configured for Natural Gas (NG) from the factory. A Propane Conversion Kit is included with every FT. The gas conversion kit will show you how to convert your FT boiler to propane gas.
  • Page 37 ORIFICE PACKING The FT Series 301 / 399 Heating Only Boiler Page 37 AVERTISSEMENT WARNING This conversion shall be installed by a qualified service Ce conversion doit être installé par un organisme de service agency in accordance with the manufacturer's instructions conformément aux instructions du fabricant et tous les...
  • Page 38 Page 38 4.15 Natural Gas to Propane Conversion (continued) Shown is a Model 301 Natural Gas with 4” Venting. MIN Fire Normal Operation MAX Fire Normal Operation NG Natural LP Propane Smart DHW Model Size Photo 3. PCB Control Board Table 16.
  • Page 39 The FT Series 301 / 399 Heating Only Boiler Page 39 NOTE: Installer is required to verify combustion settings as part of the installation process. CO should not exceed 200 ppm. Natural Gas (NG) Propane Gas (LP) CO 2 Value 3˝...

  • Page 40: Plumbing And Wiring Guidelines

    Page 40 4.16 Plumbing and Wiring Guidelines This Section will show the basic plumbing diagrams AND also the electrical connections for three (3) common installation configurations. Plumbing and Electrical Connections Piping diagrams will have a legend. And the electrical connections will show the devices.
  • Page 41 The FT Series 301 / 399 Heating Only Boiler Page 41 Photo 6. Low Voltage Photo 7. Low Voltage, Sensors...

  • Page 42: Single Wall-Mounted Boiler With Dhw Heating And High And Low Temperature Zones W/ 24 V Motorized Mixing Valve

    Page 42 4.16.1 Single wall-mounted boiler with DHW heating and high and low temperature zones w/ 24 V motorized mixing valve. 4.16.1.a Plumbing 1. This piping diagram is meant to show system piping 5. The FTHW boiler has two heating zone inputs. Two concept only.
  • Page 43 The FT Series 301 / 399 Heating Only Boiler Page 43 4.16.1.b Wiring, Single wall-mounted boiler with DHW heating and high and low temperature zones w/ motorized mixing valve. From 120VAC Circuit Panel 24 VAC Max: 1.6 Amp per pump output...

  • Page 44: Floor Stand Application: Zoning With Zone Valves And Indirect Dhw Tank Pump

    Page 44 4.16.2 Floor stand application: Zoning with zone valves and indirect DHW tank pump. 4.16.2.a Plumbing 1. This piping diagram is meant to show system piping concept only. Installer is responsible for all equipment and detailing required by local codes. 2.
  • Page 45 The FT Series 301 / 399 Heating Only Boiler Page 45 4.16.2.b Wiring with zone valves and indirect DHW tank THERMOSTAT THERMOSTAT THERMOSTAT 24 VAC INPUT MODE ZONE 4 PRIORITY NORMAL POWER IN RESET ZONE 1 ZONE 2 ZONE 3...

  • Page 46: Cascade System With Separate Control Of Space Heating And Dhw Heating

    Page 46 4.16.3 Cascade system with separate control of space heating and DHW heating. 4.16.3.a Plumbing The DHW Pumps B2-P4 & B3-P4 must be sized for the DHW Indirect require flow rate and Total Head Loss through the DHW Indirect coil, piping, and respective Boiler B2 & B3 head loss. 1.
  • Page 47 The FT Series 301 / 399 Heating Only Boiler Page 47 4.16.3.b Wiring of cascade system with separate control of space heating and DHW heating Boiler Cascade Harness FT1861 wiring missing in diagram. FT1868 The traditional Taco SR-504 zone switching relay panel was used for illustrative purposes; other, similar zone relay panels may be used.

  • Page 48: Applicable Backflow Preventer

    Page 48 CAUTION - Ensure pipe material meets local codes and industry standards. The FTHW301/399 boiler is equipped with top and bottom water connections. Return - The pipe end must be clean and free of debris. connections are located on the right side; supply connections are located on the left side - Do not apply torch heat within 12˝...

  • Page 49: Boiler Pump (P1) For Primary/Secondary Piping

    The FT Series 301 / 399 Heating Only Boiler Page 49 )*+,-#./0,#!-,..1-,#2-34 Water side Pressure Drop '#"! 12.0 '!"! 10.0 &"! %"! $"! #"! !"! !"! #"! $!"! 10.0 $#"! 15.0 %!"! 20.0 %#"! 25.0 &!"! 30.0 &#"! 35.0 742)(,89.:,0;'<6 Water Flow (GPM) Figure 9.

  • Page 50: Pressure Relief Valve

    Page 50 4.20 Pressure Relief Valve External pressure relief valve must be installed. This appliance has a high-temperature shut off switch Observe the following. Failure to comply with the built in as a standard safety feature. Therefore a guidelines on installing the pressure relief valve “pressure only”...

  • Page 51: Disposal Of Condensate

    The FT Series 301 / 399 Heating Only Boiler Page 51 4.21 Disposal of Condensate NOTICE • High efficiency gas condensing boilers create condensation when operating. Condensation is acidic Category II & IV boilers must be installed with a means with a pH ranging from 4 to 5.

  • Page 52: Electrical Wiring Connections

    Page 52 4.22 Electrical Wiring Connections FTHW 301/399 Boiler Electrical Circuit Requirement: 120VAC, 15 Amps, Single-Phase. 120 V field wiring connects to the bottom terminals on the 120 V strip. Pump connections: Max 120 V, 1.6 Amps. Note: For pumps over 1.6 Amps, use 120V isolation relay/starter and separate pump power circuit. Low voltage field wiring connects to the upper terminals on the low voltage terminals.

  • Page 53: Dip Switches

    The FT Series 301 / 399 Heating Only Boiler Page 53 4.23 DIP Switches The DIP Switches are located at the bottom of the Printed Circuit Board (PCB). The PCB faces forward at the inside of the boiler. Remove the cover to locate the PCB.

  • Page 54: Control Board, Electrical Diagram

    Page 54 4.24 Control Board, Electrical Diagram Control Board, NGTB-1000C (399 MBH)

  • Page 55: Ladder Diagram

    The FT Series 301 / 399 Heating Only Boiler Page 55 4.25 Ladder Diagram F/ B level & Flame rod...

  • Page 56: Electrical Connections (Table)

    Page 56 4.26 Electrical Connections, (table) Connector Description HT SELV #, Location, Type Label data (-) RS485 data (+) SMW250-03D (BACnet) VCC(5V) SMW250-06D LWD1140-06 MOTOR DC 24V L T/T OP Water Temperature Sensor DHW Temperature Sensor Return Temperature Sensor Exhaust Temperature Sensor L T/T Temperature Sensor System Sensor(or Over-Heat) Temperature...
  • Page 57 The FT Series 301 / 399 Heating Only Boiler Page 57 Connector Description HT SELV #, Location, Type Label CN10 LW6A4-03 PAPST Earth LW Com Sensor LW Com Sensor Thermostat(+) VCC(5V) VCC(12V) High Limit VCC(12V) CN11 Safety LWD1140-16 Function High Water Level...

  • Page 58: Section 5 Control Display And Operation

    Page 58 SECTION 5 Control Display and Operation Control Dial and Buttons (Status Light) (Constant green when operating normally) The Control Display The Control Display has a Control Dial (E), 4 Buttons (A,B,C,D), and a Liquid Crystal Display (with 72 back lit segments). This section of this manual gives instruction on how to navigate into the many functions of the Boiler and to change temperature set points, set system variables and controller parameters.

  • Page 59: Lcd Overview

    The FT Series 301 / 399 Heating Only Boiler Page 59 LCD Overview Symbol Name Description Service Reminder Mode Service Reminder Mode Indication Outside Temperature Mode Outside Temp Setting Indication Anti-freeze Mode Anti-Freeze Mode Indication Storage Mode Storage Mode Indication...

  • Page 60: Operating Mode

    Page 60 Operating Mode Operating Mode After the Power is turned on, and/or the Control Display is turned on , the Control Display will go through a ‘Start Up’ checklist and briefly show a sequence of diagnostic codes before entering into the ‘Operating Mode’. It will then display the following information.

  • Page 61: Setting The Clock

    The FT Series 301 / 399 Heating Only Boiler Page 61 Setting the Clock P-953EH The P-953EH Control Display does NOT have a daily timer or programmable thermostat. Setting the Clock. Press and hold the ‘Clock button’ for about 5 seconds. Set the ‘Year’ by turning the dial .

  • Page 62: Set Point Change Mode

    Page 62 CH Set Point Change Mode ▪ CH set point Change Mode (This mode is only functional when the outdoor sensor (O/S) is not connected.) ▪ In accordance with the United States Energy Policy and Conservation Act, this boiler is equipped with outdoor reset capability, a feature that saves energy by reducing boiler water temperature as heating load decreases Refer to Section 5.9 regarding the O/S details.

  • Page 63: Status Display Mode

    The FT Series 301 / 399 Heating Only Boiler Page 63 Status Display Mode To view any Status Parameter, P-953EH Press and Hold Button B to get into the Status Display Mode. Rotate Dial E until you find the Parameter that you wish to view.

  • Page 64: Installer Mode

    Page 64 Installer Mode These changes are to be made only by a qualified technician. WARNING For Low temperature heating applications, adjust P6 to P-953EH desired value. For cascade applications, adjust P31 to desired water temperature. Call Technical services for assistance in changing settings.
  • Page 65 The FT Series 301 / 399 Heating Only Boiler Page 65 5.7 Installer Mode (continued) Index Default Parameter Description Numbers Sets the design supply water temperature based on the maximum 130°F Minimum Supply outdoor design temperature. Minimum supply temperature must be 7: cL (54°C)
  • Page 66 Page 66 5.7 Installer Mode (continued) Index Default Parameter Description Numbers Cascade Number Range: 0 (Master), 1 (slave) 1 to 3 27: Cn Cascade Number “29: CP” has to be set with the total number of units in the cascade before “28: Cn” can be set. 28: CP Cascade Parameter Number of units cascaded.
  • Page 67 The FT Series 301 / 399 Heating Only Boiler Page 67 5.7 Installer Mode (continued) Index Default Parameter Description Numbers Mixing Valve on/off set 42: MI Mixing Valve Range: ON - OFF 7° F L-T/T L-T/T Differential Set Point 43: LT (4°...

  • Page 68: Dhw Indirect Storage Mode

    Page 68 DHW Indirect Storage Mode P-953EH To change Storage Mode Temp, First turn OFF the power to the Control Display. Then Press and Hold Button B to get into the Installer Mode. Rotate Dial E until you find 21:dH Tap Dial E to enter Storage Mode. Storage Mode indicates that the boiler is heating the water held in an indirect water heater.

  • Page 69: Outdoor Reset Adjustment

    The FT Series 301 / 399 Heating Only Boiler Page 69 Outdoor Reset Adjustment Outdoor Reset varies the control set point based on the outdoor temperature. The reset function works as shown in Figure ‘CH Outdoor Reset’. When the outdoor...

  • Page 70: Error Mode

    Page 70 5.11 Error Mode The Control Display will show the following information when an Error is presented. P-953EH Flashing Indicate Indicator Er:11 Error ‘Er:’ sign Segment Er:11 Error Code If Communication state is activated Note: When communication between the Control Display and the main controller is lost, the will not be displayed.

  • Page 71: Section 6 Error Codes

    The FT Series 301 / 399 Heating Only Boiler Page 71 SECTION 6 Error Codes Error Code Tables Error Error Code Recover Possible Remedies Code Description methods Press the Power button to clear the Error Code. If Error happens again: 1.
  • Page 72 Page 72 SECTION 6. Error Codes (continued) Error Error Code Recover Possible Remedies Code Description methods This Error Code will go away when L-tt temperature decreases. If Error happens again: L-tt sensor 1. Check L-tt temperature sensor. Ensure connections are secure. Soft Lock fault 2.
  • Page 73 The FT Series 301 / 399 Heating Only Boiler Page 73 Error Error Code Recover Possible Remedies Code Description methods This Error Code will go away when the condition is remedied. If Error happens again: MCU self 1. Turn power OFF and ON at the main power switch internal to the appliance.

  • Page 74: Fault Tree Analysis

    Page 74 Fault Tree Analysis 1. Flame detection...

  • Page 75: Fault Tree Analysis (Cont)

    The FT Series 301 / 399 Heating Only Boiler Page 75 Fault Tree Analysis (cont) 2. Gas Detection 3. ‘Storage’, ‘DHW’, ‘OP’, ‘CH overheat’, ‘Exhaust heat’ Sensor detects Error code contents DHW NTC open or short OP NTC open or short...

  • Page 76: Section 7 Trouble Shooting

    Page 76 SECTION 7 Trouble Shooting Diagnostics Question Answer The blower is still oper- This is normal because the blower keeps operating for 1 minute to vent (exhaust) the ating after the combus- flue gas from the chamber once the combustion has stopped. tion stops.

  • Page 77: Suggested Corrective Actions

    The FT Series 301 / 399 Heating Only Boiler Page 77 Suggested Corrective Actions This controller is able to record information about the boiler’s condition at the time of the five previous faults or errors. Refer to the Section ‘5.11 Error Mode’ of this manual.
  • Page 78 Page 78 7.2 Suggested Corrective Actions (continued) Fault Condition Diagnostic Corrective Action(s) Check all the temperature readings of the boiler on the DIAGNOSTICS - Occurs when TEMPERATURES menu to determine if any a temperature sensors are currently displayed as SHORT or sensor has OPEN.

  • Page 79: Section 8 Maintenance

    The FT Series 301 / 399 Heating Only Boiler Page 79 SECTION 8 Maintenance Maintenance procedures [ Daily ] Maintenance procedures [ Monthly ] - Check that the boiler front cover is closed. - Check the vent pipe. Visually inspect the flue gas vent piping for any...

  • Page 80: Maintenance Procedures [Every 6 Months]

    Page 80 SECTION 9 Installation Check Maintenance procedures [Every 6 Months] Quick View - Check the boiler piping (gas and water) Before Installing Visually inspect for leaks around internal water - Make sure that there is enough space for installing piping.

  • Page 81: Final Check Lists

    The FT Series 301 / 399 Heating Only Boiler Page 81 Final Check Lists Final check: Installation Conditions. Final check: Condensate drain installation • Is the Boiler placed level on a floor with sufficient • Have you installed a condensate drain line from the...

  • Page 82: Freeze Protection

    Page 82 Freeze Protection The FTHW301/399 Boilers are certified for indoor WARNING use only, and are not design-certified for placement Do NOT use automotive antifreeze or outdoors. ethylene glycol. Use only inhibited propylene Proper precautions for freeze protection are glycol solutions which are specially recommended for boiler installations in areas where formulated for hydronic systems.
  • Page 83 The FT Series 301 / 399 Heating Only Boiler Page 83 This page intentionally left blank.

  • Page 84: Section 10 Parts

    Page 84 FTHW301/399 SECTION 10 Parts Casing Assembly Pressure Gauge FT4144 Part Description Number 14-1 Bracket, Pressure Gauge FT4108 Air Intake Collar Ass’y (filter type) FT3010 3/8” Packing FT3062 Band, Exhaust Duct (100Φ) FT1603 Control, Display FT4010 Packing, Exhaust Outlet Adapter FT1604 Bracket, Front Panel FT4011...
  • Page 85 The FT Series 301 / 399 Heating Only Boiler Page 85 M4 x 12MM Flange Bolt Truss Head Screw M4 x 12 Tapping M5 x 10 Flange Bolt Machine Hex Head M6 x 15 Machine Screw Truss Head M4 x 14 Tapping Screw...
  • Page 86 Page 86 FTHW301/399 Water Pipe Assemblies 33-1 33-2 33-3 36-1...
  • Page 87 The FT Series 301 / 399 Heating Only Boiler Page 87 Description Part Number Piping, Water Supply Ass’y FT4124 Piping, Water Supply Top Ass’y FT4032 Adapter, Water Supply Ass’y FT4033 33-1 Sensor, Low Water Cut-Off FT4034 33-2 Sensor, Supply Water Temperature...
  • Page 88 Page 88 FTHW301/399 Gas Train and Blower...
  • Page 89 The FT Series 301 / 399 Heating Only Boiler Page 89 Description Part Number Fan Ass’y, EBM FT4047 38-1 FT4048 38-2 Packing, Fan FT4049 38-3 Damper, Body FT4050 38-4 Damper, Flap FT4051 B-13 Hex Head Bolt M5 x 12 Machine...
  • Page 90 Page 90 Heat Exchanger and Burner Assemblies Note: Set the burner nuts to a torque value of 56 lbf-in (4.7 lbs-ft) or 65 kgf.cm when tightening these nuts. Do not overtighten.
  • Page 91 The FT Series 301 / 399 Heating Only Boiler Page 91 Description Part Number Heat Exchanger Ass’y (301) FT4099 Heat Exchanger Ass’y (399) FT4101 45-1 Packing, Mix Chamber FT4100 Burner Head, Mix Chamber Ass’y FT4073 46-1 Burner Head, Mix Chamber...
  • Page 92 FTHW301/399 Accessory Items Laars Description Part Number Pressure Relief Valve FT1500 Air Vent FT3117 Outdoor Temp. Sensor FT1501 Bird Screen 3” (Qty 2) FT1730 3 / 4 ” Brass Plug (Qty 2) FT3119 Brass Adaptor FT4129 1 / 2 FT4130 ”...

This manual is also suitable for:

Fthw301Fthw399

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