Viconics C1025 - Manual (Page 2)

2
ANALOG 0 TO 10 Vdc MODULATING OUTPUT
The analog 0 to 10 Vdc modulating output can control the
room or supply temperature by modulating directly 0 to 10
Vdc SCR power controller.
Use only one of the output, not both at the same time.
Vdc PULSED MODULATING OUTPUT
The Vdc pulsed output can control the room or supply
temperature by modulating directly 4-32 Vdc triggered solid
state relays ( SSR ) using a time proportioning control
algorithm on a 1 second time cycle.
Ex.:
PI
demand
Time on Time off Total
cycle
50 % ½ sec. ½ sec. 1 sec.
25 % ¼ sec. ¾ sec. 1 sec.
This time proportioning output cannot be used on regular
mechanical relays or contactors.
Use only one of the output, not both at the same time
REMOTE SENSOR
A remote sensor can be wired and used with the C1025
thermostat. To wire a remote sensor, first set dip switch S2 to
position 0 ( off ).
If the application is for discharge air or supply temperature
control, set dip switch S1 to position 1 ( on ). This will enable
a larger proportional band, making the controlled temperature
more stable.
Characteristics of remote sensor 47 K Ω ( S61 ).
Temperature °F Temperature °C Sensor resistance
150.0 °F 65.6 °C 9.610 Kohm
140.0 °F 60.0 °C 11.700 Kohm
130.0 °F 54.4 °C 14.342 Kohm
120.0 °F 48.9 °C 17.682 Kohm
110.0 °F 43.3 °C 21.940 Kohm
100.0 °F 37.8 °C 27.412 Kohm
90.0 °F 32.2 °C 34.483 Kohm
80.0 °F 26.7 °C 43.704 Kohm
70.0 °F 21.1 °C 55.834 Kohm
60.0 °F 15.6 °C 71.866 Kohm
50.0 °F 10.0 °C 93.340 Kohm
40.0 °F 4.4 °C 122.298 Kohm
THERMOSTAT INSTALLATION
Important.
Electronic controllers require special care for wiring and
startup. To avoid problems, carefully follow the
procedures below.
Be sure to have all the literature on hand for all components
installed: controller, actuators, relay, etc...
Look at the wiring diagrams, and study them carefully. Be
sure that you understand how the system is supposed to
work.
Make the wiring according to the wiring diagrams. Respect
polarity for power terminals # 3 & # 4 between multiple
controllers if the same transformer is used.
•
Remove security screw on left side of thermostat cover.
•
Open up by pulling on the bottom side of thermostat.
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 the
cover by the bottom (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. Install proper side of
base up.
6- Install shields in the wall.
7- Insert screws in mounting holes on each side of the
base. DO NOT OVERTIGHTEN!
8- Strip each wire 1/4 inch.
9- Insert each wire according to wiring diagram.
10- Reinstall the cover ( top side first ) and gently push
back extra wire length in the hole in the wall.
11- Install security screw.