Bradford White EF120T

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238-53506-00C REV 3/20

HIGH EFFICIENCY COMMERCIAL GAS WATER HEATER

INSTALLATION & OPERATION MANUAL

WITH TROUBLESHOOTING GUIDE

SAVE THESE INSTRUCTIONS AND KEEP FOR FUTURE REFERENCE

- 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 neighbor’s phone. Follow

the gas supplier’s instructions.

• If you cannot reach your gas

supplier, call the fire department.

- For customer comfort, safety, and

convenience, it is recommended this

water heater be installed and serviced

by a plumbing professional.

If the information in these

instructions are not followed

exactly, a fire or explosion may

result causing property damage,

personal injury, or death.

WARNING

EF120T Model

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The device described in this manual is a High Efficiency Commercial Gas Water Heater, specifically the EF120T Model. It is designed for both domestic hot water and alternate space heating applications.

Function Description:

This gas-fired water heater utilizes a self-compensating negative pressure pre-mix combustion system. A blower draws air through an intake and into a venturi, mixing it with gas from the gas valve. This fuel mixture is then sent to the burner, where a Direct Spark Ignition (DSI) System ignites it to produce flue products. A flame sensor signals the ignition control board to confirm the presence of a flame. The Integrated Control System, which includes a control board and a digital display, manages the combustion blower, ignition timings, and gas valve to maintain the desired tank temperature. It can be installed as either a power direct vent system (air intake and exhaust vented to the outside) or a power vent system (combustion air drawn from inside, exhaust vented to the outside). The unit is equipped with a powered anode system for corrosion protection, designed to extend tank life without requiring anode rod replacement.

Important Technical Specifications:

Model: EF120T
Fuel Type: Gas-fired (Natural Gas or Propane, depending on rating plate)
Input Rate (BTU/h):
- EF120T400: 399,999 BTU/h (117.22 KW)
- EF120T500: 499,999 BTU/h (146.54 KW)
Storage Capacity (U.S. Gallons/Liter): 119 gallons (450 liters) for both EF120T400 and EF120T500 models.
Dimensions (Inches/Millimeters):
- Height: 77 1/8" (1959 mm)
- Diameter: 33" (838 mm)
- Cold Water Inlet: 1 1/2" NPT
- Hot Water Outlet: 1 1/2" NPT (also 1 1/2" NPT Alternate Hot Water Outlet)
- Space Heating Outlet/Return: 1" NPT
- Drain: 3/4"
- T&P Relief Valve: Located at the top
- Exhaust/Condensate Elbow: Located at the bottom
Electrical Supply: 120 VAC, 60 Hz, 15A (requires a separate circuit and breaker).
Vent System: Certified Category IV appliance. Approved for PVC, CPVC, ABS, and Polypropylene venting materials.
- Vent Pipe Diameter: 3", 4", or 6" (7.6 cm, 10.2 cm, or 15.2 cm)
- Minimum Vent Separation (Intake to Exhaust): 36" (91.4 cm)
- Maximum Vent Lengths (Combined Intake and Exhaust):
  - 3" Vent Pipe: 65 ft (19.8 m)
  - 4" Vent Pipe: 100 ft (30.5 m)
  - 6" Vent Pipe: 120 ft (36.6 m)
- Elbow Equivalency: 90° elbow = 5 ft (1.5 m) of venting; 45° elbow = 2 1/2 ft (0.76 m) of venting.
- Concentric Vent Terminal Reduction: 3" concentric terminal reduces maximum combined vent length by 30 ft (9.2 m). No reduction for 4" concentric terminal.
Gas Supply Pressure: Maximum 14.0 inch W.C. (1/2 psi).
Water Temperature Range: Adjustable from approximately 100°F (38°C) to 180°F (82°C). Factory set to 100°F (38°C).
Condensate pH: Between 4.3 and 5.0 (acidic).

Usage Features:

Digital Control Display: Located on the top front, allows for setting and displaying temperature setpoint (in °F or °C) and monitoring the water heater's status ("Idle" or "Heating"). It also displays diagnostic codes and up to 10 previous error codes to aid in servicing.
Adjustable Thermostat: Allows users to set desired hot water temperature. Warnings are provided regarding scald risk at higher temperatures, recommending lower settings or the use of an ASSE approved mixing valve.
Main Power On/Off Switch: Located on the front panel for easy power control.
Service Panels with Latches: Provide easy, tool-free access to internal components (e.g., pressure switch, exhaust high limit switch) for servicing.
NSF Compliance: Designed to be sealed to the floor with sealant for smooth and easily cleanable installation.
Combustible Floor Installation: Suitable for installation on combustible flooring, but not directly on carpeting.
Thermal Expansion Provision: If installed in a closed water supply system, provisions for thermal expansion must be made (e.g., thermal expansion tank).
Hydrogen Gas Warning: Advises opening a hot water faucet for several minutes if water has not been drawn for two weeks or more, due to the potential for flammable hydrogen gas accumulation.

Maintenance Features:

Regular Maintenance Schedule: Recommended monthly and annual inspections and tasks.
- Monthly: Tank sediment removal (drain several gallons of water), condensate line inspection and cleaning, powered anode system LED check.
- Annually: Powered anode system rod inspection, relief valve function test, vent & air intake system inspection (seals, supports, filter accessory kit), vent terminal cleaning (blockage, debris, screens), combustion system inspection (flame sensor, igniter, burner).
Cleanout Opening: Equipped with a cleanout opening to aid in the removal of hard water deposits (lime scale) from the tank bottom. Regular deliming is recommended, especially in hard water conditions.
Powered Anode System: Designed to be maintenance-free in terms of anode rod replacement. Features an LED indicator light on the control module: steady green for normal operation, flashing red for malfunction.
Temperature and Pressure Relief Valve (T&P Valve): Must be installed and checked at least twice a year for proper operation. A thorough inspection is recommended every three years.
Burner Flame Check: Visual check of burner flames through a sight glass window on the front of the combustion insert mounting bracket is recommended at installation and monthly intervals. Flames should be blue with a uniform pattern; occasional yellow or white streaks are normal.
Diagnostic Mode: Accessible via the control display for service personnel, providing information such as flame sense current, alert codes, lockout codes, and temperature sensor readings to assist in troubleshooting.