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 © 2010 by:
tekmar Control Systems Ltd. and tekmar Control Systems, Inc.
4 of 4
All specifications are subject to change without notice.
Printed in Canada. A 156 - 06/10.
Application A 156-4
System Description: The tekmar Difference Setpoint Control 156 operates the pump P1 whenever the temperature
difference between the collector and the pool is greater than the ΔT Setpoint. The control turns off the pump if the
temperature of the pool exceeds a maximum setting or if the temperature at the collector drops below a minimum setting.
The pool recirculation pump (P2) will operate continuously, or be operated by another control.
Concept Drawing: This is only a concept drawing, not an engineered drawing. It is not intended to describe a complete system, nor any particular system. It is up to the
system designer to determine the necessary components for and configuration of the particular system being designed, including additional equipment, isolation relays
(for loads greater than the control’s specified output ratings), and any safety devices which in the judgement of the designer are appropriate, in order to properly size,
configure and design that system and to ensure compliance with building and safety code requirements.
24 V (ac)
N
R
C
115 V (ac)
Class II
Transformer
L
P1
S1
S2
5
Com
6
Src
7
Stor
No Power
156
1
R+
32
RelayPower
C
-
4
120 V (ac)
24 V (ac)
Class II
Transformer
S1
P1
S2
P2
156
Solar Collector
Mechanical
P1 = On/Off Pump
P2 = Pool Recirculation Pump
S1 = Source Sensor 085
S2 = Pool Sensor 071
Electrical
P1 = On/Off Pump
S1 = Source Sensor 085
S2 = Pool Sensor 071