Dunkirk DCB-125 - 2 Introduction; Requirements for Commonwealth of Massachusetts; Designated Use; The Unit Must Not

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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 - INTRODUCTION
2.5 Designated Use
• DCC-115,DCC-150 and DCC-205 provide both central
heating and domestic hot water.
• DCB-100, DCB-125 and DCB-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.
• 
(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.

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
• DCB-100 Modulates input to provide CH Turndown
5.6:1
• DCC-115 Modulates input to provide CH Turndown
5.6:1, DHW Turndown 6.9:1
• DCB-125 Modulates input to provide CH Turndown
5.7:1
• DCC-150 Modulates input to provide CH Turndown
5.7:1, DHW Turndown 7:1
• DCB-165 Modulates input to provide CH Turndown
5.5:1
• DCC-205 Modulates input to provide CH Turndown
5.5:1, DHW turndown 7:1
Maximum output available for domestic hot water:
DCC-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.
DCC-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.
DCC-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 / 1.80 bar. If reading exceeds this

240013360 REV A [07/01/2021]
2.4 Manufacturer recommends use of Carbon
Monoxide monitor may be requirement of local
jurisdiction.