Tekmar Mixing Setpoint Control 153 Data Brochure page 3

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 connections — Caution, Maximum 24 Volts ±10%
Connect the power supply to terminals 1 (C –) and 2 (R +).
Connect a power supply (24 - 120 V ac) for the mixing valve actuator
to terminal 3 (Pwr Mix).
Connect neutral side of power supply to actuator common (–) terminal.
Connect the floating output device circuit to Relay terminals 4 (Open Mix)
and 5 (Close Mix).
Sensor connections — Caution, voltage is never applied to these terminals
Connect Supply (1) Sensor 071 to terminals Sup Sen and Com Sen (6 and 7)
Return (2) Sensor 071 to terminals Ret Sen and Com Sen (6 and 8) Optional
Settings
The digital display on the Mixing Setpoint Control 153 Floating Action has the following uses:
• To display the supply and return (if installed) temperature(s) during normal operating mode.
• To allow the user to check and program the various control settings.
• To display control operation. ("O" display element comes on when the Open relay turns on to drive the mixing valve open and "C"
display element comes on when the Close relay turns on to drive the mixing valve close.)
• To display sensor faults. Display will show "Err 1" when the Supply (1) sensor is either open circuited, short circuited or out of
temperature range. Display will show "Err 2" when Boiler Return (2) sensor is short circuited.
The following diagram illustrates how to operate the keypad buttons in order to view settings and program the control.
POWER ON
When the control is
powered-up, all display
PRGM
elements turn on.
Supply (1)
After approximately 5 seconds, the control
automatically goes into operating mode.
OPERATING MODE
When in operating mode,
the Supply (1) temperature
will be displayed.
Supply (1)
Push and Release the
"Item" button. The display
will toggle between Supply
(1) and Return (2)
temperature readings.
Supply (1)
(When return sensor is
in use.)
Item
During operation , the open
(O) and close (C) pointers
indicate relay action.
If the Return (2) pointer is
slowly flashing, the relay
operation is being controlled
by the return sensor
Item
readings.
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
DISPLAY MODE
Push and Hold the "Item"
F C
1
button. The programmed
2
Supply (1) setpoint will be
displayed.
O C
Throttling Return (2)
Push and Hold the
button. The programmed
F C
1
Throttling range will be
displayed.
O C
Throttling Return (2)
Push and Hold the
F C
button. The programmed
2
Return (2) minimum will be
displayed.
O C
Throttling Return (2)
PROGRAM MODE
Push all three buttons at the
same time. "PRGM 1" will
F C
1
appear and the Supply (1)
pointer will flash. The control
will be in programming mode.
O C Return (2)
Item
Max. 24
Volts
1 2
Power Pwr
Mix
C - R +
24V Mixing
power power
supply supply
Pushing the "Item" button
changes the flashing
F
pointer to Throttling.
1
Supply (1)
Item
Pushing the "Item" button
changes the flashing
F
pointer to Return (2).
Throttling
Item
Pushing the "Item" button
allows the Fahrenheit or
F
2 Celsius scale to be
selected.
Return (2)
Item
F
PRGM 1
Supply (1)
Push or to
change Supply (1) Setpoint
3
10A 10A
Do not apply
power here
3 4
5 6
Open
Close Com
Mix
Mix Sen
Supply
Actuating Motor
Sensor
Opens/Closes to operate
Mixing Valve, Damper, etc.
PRGM
Push
Item
change Throttling Range
PRGM
2
change Return (2) Setpoint
Item
PRGM
Push
Fahrenheit or Celsius scales
Item
7 8
Sup Ret
Sen Sen
Return
Sensor
F
Throttling
or to
F
Return (2)
Push or to
F
C
or to select between