Dunkirk DCBF-125 - 2 Introduction; Requirements for Commonwealth of Massachusetts; Designated Use; The Unit MUST NOT

8
2 - INTRODUCTION
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Information and specications outlined in this manual in eect at the
time of printing of this manual. ECR International reserves the right to
discontinue, change specications or system design at any time without
notice and without incurring any obligation, whatsoever.
2.5 Designated Use
• DCCF-115, DCCF-150 and DCCF-205 provide
both central heating and domestic hot water.
• DCBF-100, DCBF-125 and DCBF-165 central
heating only.
• Indoor installation.
• Closet or alcove installation. Direct Vent Boiler
does not require air vents when installed in closet
or room.
• Direct vent boiler.
• 
gases (LP/propane).
2 - INTRODUCTION
2.1 Installation shall conform to requirements of
authority having jurisdiction or in absence of such
requirements:
UNITED STATES
• National Fuel Gas Code, ANSI Z223.1/NFPA 54.
• National Electrical Code, NFPA 70.
2. 2 Where required by authority having jurisdiction,
installation shall conform to Standard for Controls and
Safety Devices for Automatically Fired Boilers, ANSI/
ASME CSD-1.

required.
2.3 Requirements for Commonwealth of
Massachusetts:
Boiler installation must conform to Commonwealth of
Massachusetts code 248 CMR which includes but is not
limited to:

2.6 The unit MUST NOT:
• Directly heat potable water. Indirect heating is
acceptable.
• Heat water with non-hydronic heating system
chemicals present (example, swimming pool
water).
• Toxic chemicals, such as those used for boiler
treatment, shall not be introduced into potable
water used for space heating.
• Exceed 43 psig (2.96 bar) maximum system
pressure, or drop below minimum system
pressure 7.25 psig (.50 bar)
• Exceed 176°F (80°C) system design temperature.
2.7 Operational Features
• DCBF-100 Modulates input to provide CH
Turndown 5.6:1
• DCCF-115 Modulates input to provide CH
Turndown 5.6:1, DHW Turndown 6.9:1
• DCBF-125 Modulates input to provide CH
Turndown 5.7:1
• DCCF-150 Modulates input to provide CH
Turndown 5.7:1, DHW Turndown 7:1
• DCBF-165 Modulates input to provide CH
Turndown 5.5:1
• DCCF-205 Modulates input to provide CH
Turndown 5.5:1, DHW turndown 7:1
• Maximum output available for domestic hot
water:
DCCF-115 - 105,500 btu/hr (33.8 kW) capable of
providing 2.5 (U.S.) gpm (11.4 liters/min) with a
temperature rise of 70°F/39°C.
DCCF-150 - 136,000 btu/h (40 kW), capable of
providing 3.5 (U.S.) gpm (13.2 liters/min) with a
temperature rise of 70°F/39°C.
DCCF-205 - 180,000 btu/h (53 kW), capable of
providing 5.0 (U.S.) gpm (18.9 liters/min) with
temperature rise of 70°F/39°C.
• 
• Optional Outdoor Temperature Reset.
• Heat exchanger over heat protection.
• Boiler operating at maximum operating
temperature, providing heat, pressure gauge
should not indicate more than 26.11 psi /

expansion tank is required.
2.4 Manufacturer recommends use of Carbon
Monoxide monitor may be requirement of local
jurisdiction.
240013375 REV A, [07/01/2021]