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1 of 4 © 2010 A 156 - 06/10
A 15606/10
- Application BrochureDifference Setpoint Control 156
Application A 156-1
System Description: The tekmar Difference Setpoint Control 156 operates the pump P1 whenever the temperature
difference between the collector and the storage tank is greater than the ΔT Setpoint. The control turns off the pump
if the temperature of the storage tank exceeds a maximum setting or if the temperature at the collector drops below aminimum setting.
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 thesystem 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 IITransformer
L
P1
S1
S2
5
Com
6
Src
7
Stor
No Power
156
1
R+
32RelayPower
C-
4
120 V (ac)
24 V (ac)
Class IITransformer
S1
P1
S2
156
S o l
a r
C
o l l
e c
t o r
Mechanical
P1 = On/Off Pump
S1 = Source Sensor 085S2 = Storage Sensor 071
ElectricalP1 = On/Off Pump
S1 = Source Sensor 085S2 = Storage Sensor 071
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3 of 4 © 2010 A 156 - 06/10
Application A 156-3
System Description: The tekmar Difference Setpoint Control 156 operates the pump P1 whenever the temperature
difference between the collector and the storage tank is greater than the ΔT Setpoint. The control turns off the pumpif the temperature of the storage tank exceeds a maximum setting or if the temperature at the collector drops below a
minimum setting. When P1 turns off, the fluid in the collectors is drained back into the drainback tank. P1 must be sizedappropriately to overcome the system head at startup.
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 thesystem 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 IITransformer
L
P1
S1
S2
5
Com
6
Src
7
Stor
No Power
156
1
R+
32RelayPower
C-
4
120 V (ac)
24 V (ac)
Class IITransformer
DrainbackWater Level
Outdoor
Indoor
DrainbackTank
Vent
OperationalWater Level
S1
S2
P1
156
S o l
a r
C
o l l
e c
t o r
Mechanical
P1 = On/Off Pump
S1 = Source Sensor 085S2 = Storage Sensor 071
ElectricalP1 = On/Off PumpS1 = Source Sensor 085
S2 = Storage Sensor 071
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tekmar Control Systems Ltd., Canadatekmar Control Systems, Inc., U.S.A.Head Office: 5100 Silver Star RoadVernon, B.C. Canada V1B 3K4(250) 545-7749 Fax. (250) 545-0650Web 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 thetemperature 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 thesystem 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 IITransformer
L
P1
S1
S2
5
Com
6
Src
7
Stor
No Power
156
1
R+
32RelayPower
C-
4
120 V (ac)
24 V (ac)
Class IITransformer
S1
P1S2
P2
156
S o l
a r
C
o l l
e c
t o r
Mechanical
P1 = On/Off PumpP2 = Pool Recirculation Pump
S1 = Source Sensor 085S2 = Pool Sensor 071
ElectricalP1 = On/Off Pump
S1 = Source Sensor 085S2 = Pool Sensor 071