Differential (Bang - Bang)
Setting the Differential on any control depends entirely on the actual operating characteristics of heating/cooling equipment in each
specific application. Differential settings should normally be set as small as possible for greatest accuracy, but care must be taken
to avoid short cycling of equipment. Experience, plus trial and error during actual operating conditions is usually the way most installers
determine the correct differential setting.
Delay (Bang - Bang)
Setting the time delay also depends on the actual operating characteristics of heating/cooling equipment in a specific application. With
some equipment, time delays are unnecessary and the delay setting can be set to zero time delay. Other types of equipment depend
on a fixed off delay to prevent damage to equipment components, particularly in the case of certain types of refrigeration equipment.
Consult the manufacturer's operating and installation instructions for advice on recommended time delays.
Differential (PWM)
The Differential setting determines the temperature range in which PWM action occurs. This setting should be adjusted to allow PWM
action to occur the majority of the time. Cycle and Differential settings both affect relay “on” and “off” time.
Cycle (PWM)
Cycle provides the greatest control of how often the relay is turning on and off when the measured temperature is in the differential
range. Increasing Cycle will cause the relay to stay on and off longer ( when temperature remains at setpoint). When controlling loads
that respond slowly to the heating/cooling input, the Cycle should be long. When loads respond quickly to heating/cooling input, a
short Cycle is used.
If troubleshooting becomes necessary with the One Stage Setpoint Control 150, follow the testing procedure in step four of the
installation procedure on page 2 of this brochure.
If the display window shows “Err”, the sensor is either open or short circuited, or the sensor temperature is outside the temperature
range of the control. If this type of fault occurs, the control will turn off its relay.
If you do not think the control is operating properly, check to see that the settings have been made correctly and that the problem is
not a result of external causes. Make sure that all wiring connections are solid and the sensor is located in the correct location.
In North America: tekmar Control Systems Ltd., Canada
tekmar Control Systems, Inc., U.S.A.
Head office: 4611 - 23rd Street
Vernon, B.C. Canada V1T 4K7
Tel. (604) 545-7749 Fax. (604) 545-0650
All specifications are subject to change without notice.
Printed in Canada on recycled paper.
Product designs and literature are Copyright © 1993 by:
tekmar Control Systems Ltd. and tekmar Control Systems, Inc.
4
Limited Warranty: tekmar warrants to the original purchaser each tekmar product
against defects in workmanship and materials when the product is installed and used
in compliance with tekmar's instructions. This limited warranty covers the cost of parts
and labour provided by tekmar to correct defects in materials and/or workmanship.
Returned products that are fully operational are not considered a warranty case.
tekmar also does not cover parts or labour to remove, transport or reinstall a defective
product. tekmar will not be liable for any damage other than repair or replacement of
the defective part or parts and such repair or replacement shall be deemed to be the
sole remedy from tekmar. This warranty shall not apply to any defects caused or
repairs required as a result of unreasonable or negligent use, neglect, accident,
improper installation, or unauthorized repair or alterations. In case of defect,
malfunction or failure to conform to warranty, tekmar will, for a warranty period of 24
months from the date of invoice to the original purchaser or 12 months from the date
of installation of the product, whichever occurs first, repair, exchange or give credit for
the defective product. Any express or implied warranty which the purchaser may have,
including merchantability and fitness for a particular purpose, shall not extend beyond
24 months from the date of invoice or 12 months from the date of installation of the
product, whichever occurs first.
Replacements: tekmar can send replacement products if requested. All replacements
are invoiced. Any possible credit for the replacement will only be issued once the
replaced product has been returned to tekmar.
Product Return Procedure: Products that are believed to have failed must be returned
to tekmar Control Systems Ltd. 4611-23 rd Street, Vernon B.C. Canada V1T 4K7
when agreed to by tekmar. The installer or other qualified service person must, at the
owner's expense, determine which component has failed. The product must be
returned complete with proof of purchase to the original purchaser who then returns
the product to tekmar after receiving a Return Goods Authorization (RGA) number
from tekmar.
Please include the following information with the product. The full address of the
original purchaser, the RGA number and a description of the problem.
From the U.S.A., in order to avoid customs charges, products must be returned via
US Post with the package clearly marked with the RGA number, product type and the
statement "Canadian Product returned for repair". For shipping purposes the product
can be valued at one half list price.
1) If returned during the warranty period and the product is defective, tekmar will
issue full credit for the returned product less cost of missing parts.
2) If returned during the warranty period and the product is fully operational, tekmar
will return the product to the original purchaser for a testing cost of $30.00 plus
postage.
3) If returned during the warranty period and the product is not damaged and is fully
operational, tekmar can take back the product for a return charge of 40% of the
product's net value. This request has to be specified otherwise the product will be
returned with a testing cost of $30.00 plus postage.
4) If returned after the warranty period and the product needs repair, tekmar will
repair and return the product. Repair and postage costs will be invoiced. tekmar's
repair costs are calculated at $30.00 / hour plus the cost of parts. If the repair costs
will be more than $60.00 a repair estimate will be sent to the original purchaser.
Limited Warranty and Product Return Procedure
Before you leave
• Install the wiring cover over the wiring chamber and secure it with the screw provided. • Place the front cover on the control to
cover the setting dials and snap it into place. • Place this brochure, and all other brochures relating to the installation, in the protective
plastic bag supplied with the control. • Place the bag in a conspicuous location near the control for future reference. • It is important
to explain the operation of this control within the system to the end user, and anyone else who may be operating the system.
Testing and Troubleshooting
PWM
Dip Switch Down
PWM
Dip Switch Up
PWM
Dip Switch Down
PWM
Dip Switch Up
Printed in Canada on recycled paper by
To Previous Page
Loading...