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Control Description The Boiler Control 265 is a microprocessor-based control designed to operate up to three modulating boilers. The 265 can provide either outdoor reset and setpoint operation or outdoor reset and DHW operation. The 265 provides either sequential or parallel modulation and has Equal Run Time Rotation of the boilers. The control also operates the system pump and individual boiler pumps. The 265 provides either a 0 -20 mA or 4 -20 mA signal to each boiler. A contact is also available for either a combustion air damper or external alarm. The control can provide outdoor reset using an outdoor sensor or the control can accept a 0 -10 V (dc) signal from an EMS / BAS to establish the required water temperature.

LiteratureD 265, A 265's, D 001, D 070
Control Microprocessor PID control; This is not a safety (limit) control
Packaged Weight 3.5 lb. (1600 g), Enclosure A, blue modified PVC plastic
Dimensions 6-5/8" H x 7-9/16" W x 2-13/16" D (170 x 193 x 72 mm)
Approvals CSA C US, meets ICES & FCC regulations for EMI/RFI
Ambient Conditions Indoor use only, 32 to 104¼F (0 to 40¼C), < 90% RH non-condensing
Power Supply 115 V (ac) ¼10% 50/60 Hz 600 VA
Relays 230 V (ac) 5 A, 1/3 hp, pilot duty 230 VA
Modular Output 0-20 mA / 4-20 mA (up to 1000Ω load)
Demands 20 to 260 V (ac) 2 VA
Sensors Included NTC thermistor, 10 kΩ @ 77¼F (25¼C ¼0.2¼C) +=3892
Outdoor Sensor 070 and 2 of Universal Sensor 071
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Multiple Boilers
3 Boiler
Width (Inches):
User Interface:
Push Button
Depth (Inches):
Ambient Conditions:
Indoor Only: 32°-104°F < 90% RH non-condensing
Power Supply:
115V (ac)
230 V (ac) 5 A-1/3 hp- pilot duty 240 VA
Max Temp (F):
Min Temp (F):
Temperature Range (F):
Microprocessor PID control
Weight (lbs):
3.5 lbs
20 to 260 V (ac) 2 VA
NTC Thermistor 10 k ohm @ 77°F
0-20 mA / 4-20 mA (up to 1000 ohm load)
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