User's Manual - The FT Series Wall Mounted, Combination Boiler

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.

WARNING

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.

AVERTISSEMENT (French Warning)

Assurez-vous de bien suivre 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 ni d'autres vapeurs ou liquides inflammables dans le voisinage de cet appareil ou de tout autre appareil. QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ: Ne pas tenter d'allumer d'appareils. Ne touchez à aucun interrupteur. Ne pas vous servir des téléphones dans le bâtiment où vous êtes. 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 service 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.

(English translation of AVERTISSEMENT: Ensure you follow the instructions in this notice to minimize the risk of fire or explosion or to avoid any material damage, injury, or death. 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 attempt to light any appliances. Do not touch any switches. Do not use telephones in the building where you are. Immediately call your gas supplier from a neighbor's. Follow the supplier's instructions. If you cannot reach the gas supplier, call the fire department. Installation and maintenance must be performed by a qualified installer or service provider or the gas supplier.)

Introduction

This User's Manual will guide you into the basics of operating your FT Series Combi. Please reference the Installation and Operation Manual for complete details. Doc# 1487

The FT Series Combi is a wall mounted, condensing and fully modulating, residential boiler and water heater.

Caring For Your FT Series Combi

Your FT Series Combi will require very little maintenance. However, as with any fine appliance there are certain steps that should be taken to ensure continuing optimum performance.

2.1 General Care

• Keep the area around the FT Series Combi clean and free from combustible materials, gasoline and other flammable liquids and vapors.
• The FT Series Combi must be completely isolated and protected from any source of corrosive chemical fumes such as trichlorethylene, perchlorethylene, chlorine, etc.
• Keep bottom and top openings on the boiler free for proper ventilation of interior components.
• Do not obstruct or block a free flow of air to the boiler to ensure proper ventilation.
• If desired, clean the jacket surfaces with a damp cloth and mild detergent. Do not use flammable cleaning materials.
• If sidewall vented, keep the vent terminal clear of obstructions -- do not allow snow to cover the vent terminal. Clean the intake screen often, and then develop an appropriate maintenance schedule.

2.2 Annual Inspection of Flue and Vents

Visually inspect the vent pipe once a year. Should any deterioration exist, have the affected parts replaced by a qualified service person.

2.3 In the Event of a Power Failure

The FT Series Combi cannot be operated during an electrical power outage. If there is an extended power outage with danger from freezing, then the FT Series Combi (and all other water systems) should be drained completely. When draining the boiler, turn off the main electrical disconnect switch. When placing back in service, refer to Section 3 of this Manual for instruction. All draining and filling must only be done by a qualified service person.

2.4 Full Service Every Year

In addition to the annual visual inspections, a qualified service agency should conduct a detailed inspection of all flue product carrying areas of the FT Series Combi and its venting system.

Component Identification

The diagram shows a side view of the boiler with various components labeled with numbers. A separate schematic illustrates airflow and water connections, indicating combustion air intake, vent exhaust, CH supply, and CH return.

Shut Down and Restart

3.1 To Start the FT Series Combi

If drained, please refer to the Install and Operating Manual to ensure that the complete 'Setup' procedure has been followed before starting this boiler. A complete 'Setup' must be performed by a qualified service person.

3.2 Shutting Down the FT Series Combi

1. Turn off the main electrical disconnect switch.
2. Close all manual gas valves.
3. If freezing is anticipated, drain the FT Series Combi and be sure to also protect building piping from freezing. All water must be removed from heat exchanger and condensate trap or else damage from freezing may occur. Please refer to the Install and Operating Manual.

This step to be performed by a qualified service person.

The Control Display and Operation

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 FT and to change temperature set points, set system variables and controller parameters.

Control Display Layout

The display includes:

• Buttons: A, B, C, D
• Control Dial: E
• Status Light: (constant green when operating normally) ?

Button Functions

Temperature Specifications

• Operating ambient Temperature Range: -10 to 60°C.
• Operating Relative Humidity up to: 90% at 40°C.
• Shipping & Storage Temperature Range: -20 to 80°C.

Control Display and Operation (continued)

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:

• Current Operating Temperature: e.g., 110°F
• Temperature sign: Celsius or Fahrenheit letter (°C or °F)
• Display and Controller are communicating: [?]
• If flame detected: [?]
• If pump is operating: [⚙️]
• Outdoor sensor or 0-10V: [☁️]

Status Display Mode

To view any of the listed Status Parameters:

1. Press and Hold Button B to get into the Status Display Mode.
2. Rotate Dial E until you find the Parameter you wish to view.
3. Tap Dial E to enter that Parameter.
4. Adjust the setting and then press (tap) Dial E to save and to Exit.

Status Display Parameters:

DHW Set Point Change Mode

The display shows the following information when changing water heating temperature set points.

Changing between Celsius and Fahrenheit: When the button D is pressed (for more than 5 seconds), temperature unit will toggle between °C and °F.

DHW Set Point Ranges:

• Default DHW set point is 120°F (49°C).
• DHW 95-120°F (35 - 49°C) LOW range (Default): To change LOW range, press the C Button. The DHW icon [?] and current DHW LOW will flash. Turn dial E clockwise to increase and counterclockwise to decrease until desired temperature is reached. Press dial E to save set point changes.
• DHW 121 - 140°F (49.5 - 60°C) HIGH range: To change HIGH range, press and HOLD the C button for more than 5 seconds. The DHW icon [?] and current DHW HIGH will flash. Turn dial E clockwise to increase and counterclockwise to decrease until desired temperature is reached. Press dial E to save set point changes and to Exit.

DANGER: Scalding may occur within 5 seconds at a setting of 140°F (60°C). Water temperatures over 125°F can cause severe burns, or death from scalding. Children, disabled, and elderly are at highest risk of being scalded. Read all instructions before setting temperature at appliance. Feel water before bathing or showering.

Manufacturer strongly recommends the use of an anti-scald mixing valve at domestic hot water outlet (boiler location) to reduce potential for scalding. Contact Manufacturer for recommended models. Check with local codes.

CH Set Point Change Mode

Changing between Celsius and Fahrenheit: When the button D is pressed (for more than 5 seconds), temperature unit will toggle between °C and °F.

CH Set Point:

• Default CH set point is 130°F (54°C).
• CH set point range is 130 - 180°F (54.4 ~ 82.0°C).
• To change CH Set point, press the D button. The CH Icon [?] and current CH Set point will flash. Turn the E dial clockwise to increase, and counterclockwise to decrease CH set point, until desired temperature is reached. Press E dial to save changes and to Exit.

Storage Mode

To activate heat storage function, 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 5:St. Tap Dial E to enter Storage Mode. Storage Mode indicates that the boiler is maintaining the water temperature in the internal storage tank. When Storage Mode is active, the display will appear as shown.

Turn the E dial clockwise to activate and counterclockwise to deactivate the Heat storage function. Default: ON. Press E dial to save changes and to Exit.

Notes

The document includes blank pages for notes.

Customer Service and Product Support

Customer Service and Product Support: 800.900.9276 • Fax 800.559.1583

20 Industrial Way, Rochester, NH, USA 03867

Dimensions and specifications subject to change without notice in accordance with our policy of continuous product improvement.