Application Brochure

tekmar Control Systems Ltd., Canada
tekmar Control Systems, Inc., U.S.A.
Head Office: 5100 Silver Star Road
Vernon, B.C. Canada V1B 3K4
[phone] Fax. [phone]
Web Site: www.tekmarcontrols.com
Product design, software and literature are Copyright © 2007 by:
tekmar Control Systems Ltd. and tekmar Control Systems, Inc.
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All specifications are subject to change without notice.
Printed in Canada. A 279 - 12/07.
Specifi cations:
The following are the recommended specifications for the Steam Control 279
The control shall be able to operate a single steam boiler or an on-off steam valve.
The control shall use an outdoor reset algorithm to determine the steam heating system on time during a heating cycle.
The control shall measure the outdoor air temperature using a sensor and display the measured outdoor air temperature
on the display.
The control shall turn on the steam heating system once the measured outdoor temperature exceeds the control’s
adjustable warm weather shut down setting.
The control shall have the option to measure the condensate return temperature.
The control shall have an adjustable steam established setting that is based upon the condensate return temperature.
The control shall have an adjustable lockout differential setting that is based upon the condensate return temperature.
The control shall have the option of measuring the indoor air temperature using either one or two indoor sensors.
The control shall have the option to display the measured indoor temperature.
The control shall have the option to operate the steam heating system based upon the average of two indoor sensor
temperature readings.
The control shall have the option to operate the steam heating system based upon the lowest of the two indoor sensor
temperature readings.
The control shall have the option to display the measured condensate return temperature.
The control shall have a test button that activates a pre-programmed test sequence.
The control shall have a low level alert output that closes a contact should a sensor fault occur.
The control shall have a high level alert output that closes a contact should one of the indoor sensors fall below a preset
temperature or should a memory error occur.
The control shall continually monitor its temperature sensors and provide an error message should a sensor fault
be detected.
The control shall record and display the running hours of the steam heating system.
The control shall have a time clock that includes a four-hour backup in the event of a power loss.
The control shall have a seven-day, four-event programmable schedule stored in non-volatile memory.
The control shall have temperature settings that follow a programmable schedule.
The control shall have an optimum start feature to quickly recover when switching from the setback temperature to the
regular operating temperature.
The control shall have the option to measure the temperature of a domestic hot water tankless coil for the purpose to
turn on the steam boiler to maintain temperature.
The control shall have a manual override.
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