Application Brochure

© 2010 A 156 - 06/10 2 of 4
Application A 156-2
System Description: The tekmar Difference Setpoint Control 156 operates the pump P1 whenever the temperature
difference between the wood stove (source) 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 source drops
below a minimum 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 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
S2
P1
156
Mechanical
P1 = On/Off Pump
S1 = Source Sensor 085
S2 = Storage Sensor 071
Electrical
P1 = On/Off Pump
S1 = Source Sensor 085
S2 = Storage Sensor 071