One
Stage Steam Control 269 - with Early Start
Control Description The One Stage Steam Control 269 is a microprocessor based steam boiler control. Based on outdoor temperature, the 269 adjusts the on time of a steam boiler or valve. The 269 has a condensate return sensor to measure the point at which steam is established and also to provide a Lockout Differential for ensuring all latent heat is extracted from the steam before the cycle starts again. One or two indoor sensors can provide indoor temperature feedback to the control. An auxiliary relay is provided for operation of a condensate pump.
Literature |
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Control |
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Microprocessor PID control; This is not a safety (limit) control |
Packaged Weight |
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3.1 lb. (1400 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, 30 to 120°F (0 to 50°C), < 95% RH non-condensing |
Power Supply |
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120 V (ac) ±10% 50/60 Hz 3 VA |
Relay Capacity |
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120 V (ac) 10 A 1/4 hp, pilot duty 240 VA 2 A |
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 #: 031, 032, 071, 076, 077 |
Occupied |
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40 to 100°F (4 to 38°C) |
UnOccupied |
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40 to 100°F (4 to 38°C) |
Manual Override |
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Auto, 0 to 100% of boiler on time during Heating Cycle |
Design Out |
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-40 to 40°F (-40 to 4°C) |
Cycle Length |
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1 to 100 minutes |
Steam Established |
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130 to 230°F (54 to 110°C) |
Min. On Time (%) |
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Off, 5 to 50% on |
Lockout Diff'l (°F) |
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Off, 1 to 50°F (Off, 3 to 28°C) |
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