Viconics T250 - Manual

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028-2003 M:\1_BINDER\01_MICROSTAT\01_English\07_Manual\T250ME02.DOC 3/21/03
THERMOSTAT WITH:
• 2 OUTPUTS
• DAY-NIGHT MODE ( T250 ONLY )
TO OPEN THERMOSTAT COVER
• Remove security screw on left side of thermostat cover.
• Open up by pulling on the left side of thermostat.
THERMOSTAT INSTALLATION
A) Location:
1- Shouldn’t be installed on outside wall.
2- Must be installed away from any heat source.
3- Shouldn’t be affected by direct sun radiation.
4- Nothing must restrain vertical air circulation to the thermostat.
B) Installation:
1-
Pull out cables 6” out of the wall.
2- Wall surface must be flat and clean.
3- Separate the thermostat and the base by pulling cover on the left side (same
as the security screw.)
4- Insert cable in the central hole of the base.
5- Align the base and mark the location of the two mounting holes on the
wall.
6- Install shields in the wall.
7- Insert screws in mounting holes on each side of the base.
DO NOT OVERTIGHTEN!
8- Open the cable protection 1 1/4 inch more or less.
9- Strip each wire 1/4 inch.
10- Insert each wire according to wiring diagram.
11- Reinstall the cover ( right side first ).
12- Install security screw.
SETPOINT ADJUSTMENT KNOB LIMITATION
Note: To limit the rotation of setpoint knob, adjust setpoint to desired value, then
insert stoppers in appropriate holes.
Horizontal model:
S1,S10 = No limitation
S3 à S8 = Setpoint limitations
Vertical model:
S7,S10 = No limitation
S1 to S7, or S12: Setpoint limitations
REMOTE SENSOR
It is possible to use a remote sensor ( for duct or room application) by connecting it to
pins no. 6 and 7. Inside sensor must be disconnected by removing jumper J4 inside the
thermostat.
Characteristics of remote sensor 47 K Ω.
180.0 °F 82.2 °C 5.494 Kohm 0.553 Volts
170.0 °F 76.7 °C 6.585 Kohm 0.648 Volts
160.0 °F 71.1 °C 7.933 Kohm 0.761 Volts
150.0 °F 65.6 °C 9.610 Kohm 0.893 Volts
140.0 °F 60.0 °C 11.700 Kohm 1.047 Volts
130.0 °F 54.4 °C 14.342 Kohm 1.225 Volts
120.0 °F 48.9 °C 17.682 Kohm 1.429 Volts
110.0 °F 43.3 °C 21.940 Kohm 1.659 Volts
100.0 °F 37.8 °C 27.412 Kohm 1.914 Volts
90.0 °F 32.2 °C 34.483 Kohm 2.191 Volts
80.0 °F 26.7 °C 43.704 Kohm 2.486 Volts
70.0 °F 21.1 °C 55.834 Kohm 2.791 Volts
60.0 °F 15.6 °C 71.866 Kohm 3.096 Volts
50.0 °F 10.0 °C 93.340 Kohm 3.393 Volts
40.0 °F 4.4 °C 122.298 Kohm 3.673 Volts
30.0 °F -1.1 °C 161.670 Kohm 3.927 Volts
20.0 °F -6.7 °C 215.805 Kohm 4.150 Volts
10.0 °F -12.2 °C 291.100 Kohm 4.341 Volts
0.0 °F -17.8 °C 396.830 Kohm 4.499 Volts
DAY-NIGHT MODE
An external contact closing between terminals 6 and 8 activates night mode. A LED
on the thermostat flashes continuously indicating night mode. By pressing the button
on the thermostat, day mode is reactivated. The thermostat returns to night mode when
pressing again the button, or automatically after a 4 hours delay.
Note: Terminals 6 and 8 can be connected together between thermostats.
SPECIFICATIONS
Operating Conditions: 0 °C to 50 °C ( 32 °F to 122 °F )
0% to 95% R.H. non-condensing
Sensor: Local 47 K NTC thermistor
Resolution: ± 0.1 °C ( ± 0.2 °F )
Control accuracy:
( calibrated )
± 0.2 ° C ( ± 0.4 °F ) for low ranges
± 0.9 ° C ( ± 1.8 °F ) for high ranges
Ranges: 10 °C to 32 °C ( 50 °F to 90 °F )
-18 °C to 82 °C ( 0 °F to 180 °F )
Outputs: Isolated Triac: 30 Vac at ½ A max.
0 to 10 Vdc into 2K
Ω resistance min.
0 / 5 Vdc at 20 mA max. for both outputs.
Power: 24 Vac -15%, +10% 50/60 Hz; 2 VA
DIMENSIONS
0
180
135
90
45
F
VICONICS
5
4
3
2
1
10
9
8
7
6
114 mm
32 mm
( 71 mm )
( 71 mm )
2.8"
2.8"
( 114 mm )
( 83 mm )
4.5"
4.5"
1.275"
3.275"
COVER
SECURITY SCREW
OR FROM BACK
FROM TOP
WIRING
MODEL
VERTICAL
HORIZONTAL MODEL
BASE
T200
T250