tekmar 150 One Stage Setpoint Control - Manual (Page 3)

Push or to
change Delay/Cycle
Item
Item
Push or to select between
Fahrenheit or Celsius scales
The control automatically goes back to operating mode when the buttons are left alone for 20 seconds The control automatically goes back to operating mode when the buttons are left alone for 20 seconds
PRGM
F
Setpoint
When the control is
powered-up, all display
elements turn on.
DISPLAY MODE
POWER ON
When in operating mode,
the measured temperature
will be displayed.
After approximately 5 seconds, the control
automatically goes into operating mode.
OPERATING MODE
Push or to
change Setpoint
Delay/Cycle Push or to select between
Heating or Cooling operation
PRGM
HEAT COOL
PRGM
F
Item
Item
Push all three buttons at the
same time. "PRGM" will
appear and the Setpoint
pointer will flash. The control
will be in programming mode.
Pushing the "Item" button
changes the flashing pointer
to Differential
Pushing the "Item" button
allows Heating or Cooling
operation to be selected
Pushing the "Item" button
allows the Fahrenheit or
Celsius scale to be
selected
Push and Hold the
button. The programmed
Delay or PWM cycle
length will be displayed.
PROGRAM MODE
PRGM
F
Differential
C
PRGM
Delay/Cycle Item
Pushing the "Item" button
changes the flashing pointer
to Delay / Cycle
Push and Hold the "Item"
button. The programmed
Heating or Cooling Setpoint
will be displayed.
Push and Hold the
button. The programmed
Differential will be
displayed.
F
Differential
Setpoint
F
Differential
HEAT COOL
F C
PRGM
Setpoint Delay/Cycle
Item
Item
Push or to
change Differential
Item
Setpoint Differential
F
Delay/Cycle
HEAT
HEAT
HEAT
3
Test the sensor
This test must be performed before power is applied to the control and before the sensor is connected to the terminal strip. Test
the sensor according to the instructions printed in the enclosed Data Brochure D 001.
Test the power supply
• Ensure that the wires from the power supply transformer are not touching each other, any other wires, or ground. Turn on the
power and, using an AC voltmeter, you should measure between 20 and 28 volts at the secondary side of the transformer.
• Turn off the power and complete the electrical connections to the terminal strip of the control.
Electrical connections
Power and output connections — Caution, Maximum 24 Volts A.C.
Connect — the transformer to terminals C — R (1 and 2)
— the heating/cooling device circuit to terminals:
R
| – N/O (3 + 4) is normally open (N/O) and closes when the relay turns on.
R | – N/C (3 + 5) is normally closed (N/C) and opens when the relay turns on.
Sensor connection Caution, voltage is never applied to these terminals
Connect the Universal Sensor 071 to terminals Sensor (6 and 7)
The digital display on the One Stage Setpoint Control 150 has the following uses:
• To display the actual temperature during normal operating mode.
• To allow the user to view and program the various control settings.
• To display control operation. (“HEAT” display element comes on when the relay closes to operate a heat source and “COOL”
display element comes on when the relay closes to operate a cooling device.)
• To display sensor faults. (Display will show “Err” when the sensor is either open or short circuited.)
Settings
The following diagram illustrates how to operate the keypad buttons in order to view settings and program the control.
Max. 24
Volts
24 V
power
supply
Heating/Cooling
device circuit
1
C
2
R
3 4
8A
6 7
Sensor
071
Sensor
5
R' N/O N/C
8A
Do not apply
power here