Viconics T266 - Manual

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028-2006 M:\1_BINDER\01_MICROSTAT\01_English\07_Manual\T266ME03.DOC 3/21/03
THERMOSTAT WITH:
• DAMPER MOTOR VOLTAGE OUTPUT, 0 TO 10 Vdc
• DAMPER POSITION MIN/MAX ADJUSTMENTS
• 2 MORE OUTPUTS
• REVERSING OF DAMPER
• DAY-NIGHT MODE ( T266 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
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.
DAMPER CHANGEOVER INPUT
A) MANUAL CHANGEOVER (Code G = 1 or 2): Output 3 operates generally as
per selected mode on the order code (example: cooling, G = 1). When a contact closes
between terminals 6 and 9, output 3 changes its action (Example: heating). Terminals
6 and 9 can be connected together between thermostats.
Use a diode (Example: 1N4001) as indicated on the wiring diagram. Only one diode is
needed for all thermostats connected together.
Note: Terminals 6 and 9 can be connected together between thermostats.
B) AUTOMATIC CHANGEOVER (Code G = 3): Use a remote sensor (S60 or
S70) for each thermostat, upstream of the damper. This sensor can be calibrated ( ±
2.0 °C )at the thermostat if needed, using a small screwdriver on the right side of the
thermostat. Indicated temperature increases when rotating the potentiometer
clockwise.
When the supply temperature is below the setpoint, output 3 operates in cooling mode.
When the supply temperature is above the cooling setpoint (setpoint + co), output 3
operates in heating mode.
C) AUTOMATIC CHANGEOVER WITH RECIRCULATION (Code G = 4):
Damper operates as described above in B (automatic reversing), except that, when
supply air temperature is between heating and cooling setpoint for a period more than
25 seconds, damper opens 100 %.
DAMPER 0 TO 10 VDC OUTPUT
Output no 3 (terminal no. 10) produces a DC voltage 0 to 10 volts generally used for
damper control. Minimum value of damper or flow can be adjusted using the C263
programmer from 0 to 100 %. Adjust LL parameter to desired minimum position and
HL to maximum desired position. LL and HL are preprogrammed at 0 (0 volt) and
100% (10 volts) at the factory. Adjusting LL and HL does not affect the effective
proportional band. Example: LL=20%, HL=80%, Pb=0.9
°C. damper will modulate
from 20 to 80 % on a 0.9 °C proportional band.
Parameter HF is used to adjust the maximum value of damper or flow. This
parameter is active when damper is in cooling mode only. If adjusted to 0, the damper
position will remain at minimum (LL) on a heating demand. If adjusted at a value
higher than the LL value, the damper position will raise proportionally with the
heating demand, up to this maximum value.
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
ORDER CODE
T216 - AB - CD - EF - GH ( without day-night mode )
T266 - AB - CD - EF - GH ( with day-night mode )
Example: T266 - 52 - 11 - 12 - 30
One "SSR" 3-32 volts heating output
and one normally open thermal valve heating output.
Main sensor located inside the room. Setpoint adjustable by user.
Scale 50
°F to 90 °F. The output no. 3 is for a 0-10 volts dc damper motor.
The damper changeover is automatic according to supply sensor temperature. Night
setback is available.
Note: Order remote/changeover sensors separately.
T216
T266