Boiler
Control 268 - Nine Stage Boiler & DHW / Setpoint
Control Description The Boiler Control 268 is a microprocessor-based nine stage boiler control. The 268 can provide either outdoor reset and setpoint operation or outdoor reset and DHW operation. The 268 stages and has Equal Run Time Rotation of the boilers and also operates the system pump and individual boiler pumps. One, two, three and four stage on / off boilers can be operated. The 268 also has options for fixed lead and fixed last rotation sequences. 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.
Literature |
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D 268, A 268's, D 001, D 070 |
Control |
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Microprocessor PID control; This is not a safety (limit) control |
Packaged Weight |
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3.3 lb. (1500 g), Enclosure A, blue PVC plastic |
Dimensions |
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6-5/8" H x 7-9/16" W x 2-13/16" D (170 x 193 x 72 mm) |
Approvals |
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CSA C US, meets ICES & FCC regulations for EMI/RFI |
Ambient Conditions |
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Indoor use only, 32 to 122°F (0 to 50°C), < 90% RH non-condensing |
Power Supply |
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115 V (ac) ±10% 50/60 Hz 600 VA |
Relays |
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230 V (ac) 5 A, 1/3 hp, pilot duty 230 VA |
Demands |
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20 to 260 V (ac) 2 VA |
Sensors Included |
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NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892 |
Optional Devices |
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tekmar type #: 032, 071 |
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