Product Description Tekmar 264 Boiler Control - Four Stage Boiler & DHW / Setpoint The Boiler Control 264 is a microprocessor-based four stage boiler control. The 264 can provide either outdoor reset and setpoint operation or outdoor reset and DHW operation. The 264 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 264 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 tekmar Boiler Control 264 has been modified to include the following features: • DHW demand for DHW loads • Boiler alarm • New Setpoint operation • New DHW Pmp / Vlv contact Specifications: • Literature: D 264, A 264's, D 001, D 070 • Control: Microprocessor PID control; This is not a safety (limit) control • Packaged Weight: 3.4 lb. (1550 g), Enclosure A, blue 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, 30 to 120+F (0 to 50+C), < 95% RH non-condensing • Power Supply: 115 V (ac) +10% 50/60 Hz 600 VA • Relays: 230 V (ac) 5 A, 1/3 hp, pilot duty 240 VA • Demands: 20 to 260 V (ac) 2 VA • Sensors Included: NTC thermistor, 10 kΩ @ 77+F (25+C +0.2+C) +=3892 Outdoor Sensor 070 and 2 of Universal Sensor 071 • Optional Devices: Tekmar type #: 032, 071 • Width (Inches): 7-9/16" • Height: 6-5/8" • Stages: 4 Boiler • User Interface: Push Button LCD" • Application: Heating • Voltage: 230v • Depth (Inches): 2-13/16" • Ambient Conditions: Indoor Only: 32°-120°F < 95% RH non-condensing • Power Supply: 115V (ac) • Relays: 230 V (ac) 5 A-1/3 hp- pilot duty 240 VA • Temperature Range (F): -76°F - 266°F