Application Brochure

A 150-1
Operation
The One Stage Setpoint Control 150 regulates the temperature of the slab by turning the injection pump on and off in response to
temperature changes at the slab sensor.
Note:
For optimum control, the supply temperature from the boiler should be constant. This will allow the system to be balanced so
that the supply fluid to the slab is just hot enough to maintain the slab temperature at design conditions.
• For control installation and testing instructions see Brochures D 150 and D 001.
• For control theory and system integration details see Essays E 001 and E 002.
Additional Information
Specifications
The following are minimum recommended specifications for the control in this application.
•The slab temperature shall be maintained based on the programmed setpoint temperature.
•The slab pump must run continuously with the injection pump cycling on and off to provide heat input into the slab.
•The control shall operate the injection pump using Pulse Width Modulation (PWM) action.
•The control shall be able to display and adjust the setpoint temperature, differential and delay or cycle length.
•The control shall have an adjustable cycle length of 30 sec. to 19 min. 50 sec (10 second increments).
• The control shall be microprocessor-based and have an internal SPDT relay with 8 amp (resistive) isolated contacts for outputs.
• The installation location must be maintained within the ambient temperature and humidity ranges specified in the D 150 Brochure
for this control, with the installer ensuring that the control and its wiring are isolated and/or shielded from strong sources of
electromagnetic noise.
•The control shall continuously monitor its temperature sensors and provide an error message upon sensor failure.
• The control components required from tekmar are a One Stage Setpoint Control 150, one Slab Sensor 072 or 073 and one Relay
003. (The Supply Sensor 071 included with this control should not be used if the sensor is to be poured directly into a concrete
slab without using conduit.)
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932 ot 04-tniopteS °F (-40 to 115°C)
Differential range (PWM) 3 to 40°F (2 to 22°C)
(10 second increments)
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(10 second increments)
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Settings
One Stage Setpoint Control 150 DIP switch setting for this application.
On
1
Off
PWM — DIP switch should
be in the up position
Control Systems
tekmar Control Systems Ltd., Canada
tekmar Control Systems, Inc., U.S.A.
Head Office: 5100 Silver Star Road
Vernon, B.C. Canada V1B 3K4
Tel. [phone] Fax. [phone]
Web Site: www.tekmarcontrols.com
Product design, software and literature are Copyright © 2008 by:
tekmar Control Systems Ltd. and tekmar Control Systems, Inc.
All specifications are subject to change without notice.
Printed in Canada. A 150-1 - 12/08