Viconics C1011 User Manual

ELECTRONIC THERMOSTATS

C1011

• One floating output

• Supply air temperature auto changeover input

DESCRIPTION

The C1011 series thermostats are microcomputer-based,
proportional and integral (PI) devices with one floating
(incremental) output. It can be used with most controlled
devices in the HVAC industry that are compatible with this
signal. Typical applications would be to control a floating
VAV or valve actuator. The thermostats also contain a berg
jumper for the actuator stroke time from full open to full
close.

Type of

output

Modulating

floating

SPECIFICATIONS

In cooling In heating

Modulating devices

Floating damper

actuator

Floating valve

actuator

Modulating devices

Floating damper

actuator

Floating valve

actuator

DIMENSIONS

WIRING

FROM TOP

OR FROM BACK

SECURITY SCREW

BASE

3.275"

( 83 mm )

90

80

70

F

60

50

4.5"

( 114 mm )

2.8"

( 71 mm )

HOW TO ORDER

C1011

Notes:

• Order changeover sensor separately.

• Vertical mounting is standard.

-

↓

00C = °C scale

↓

00F = °F scale

MODULATING FLOATING OUTPUT

1.275"
32 mm

Operating Conditions: 0 °C to 50 °C ( 32 °F to 122 °F )

0% to 95% R.H. non-condensing

Sens or: Local 47 K NT C thermistor

Resolution: ± 0.1 °C ( ± 0.2 °F )

Control accuracy: ± 0.2 ° C ( ± 0.4 °F ) ( calibrated )

Ranges: 10 °C to 32 °C ( 50 °F to 90 °F )

Proportional band f or r oom

temperature control: 1.8°C ( 3.2°F )

Floating output: Non isolated triac s: 30 Vac, ½ A max.

Power: 24 Vac -15%, +10% 50/60 Hz; 2 VA

This output is designed to give true PI modulation out of
floating actuator for VAV dampers and valves.

The thermostat is designed for operation with actuators that
have a running time of 1.5 to 2.5 minutes for the full open /
close stroke time.

The output is normally cooling but can be reversed to
heating mode with 2 different methods:

• Auto changeover to heating mode with a supply

sensor.

A remote supply sensor can be used for each thermostat.
Supply temperature > 78°F (26°C) = heating mode
Supply temperature < 75°F (24°C) = cooling mode
Hysterisys is 3°F (2°C)

• Auto changeover to heating mode with a dry contact.

A closed contact on the changeover input will change
operation of the floating output to heating mode.
Open contact = cooling mode
Closed contact = heating mode

1

Characteristics of changeover sensor 47 KΩ

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.

CONTROL CURVES AND SEQUENCE

SETPOINT DIAL

Opened

100%

50 %

Device

opened

Heating mode

changeover
input active

Device

opened

Cooling mode

Closed

0%

Device closed

Temperature increase

2