Viconics T186 User Manual

T186 Electronic Wall Sensor With Setpoint Adjustment

For Use With R842 Baseboard Relay

DESCRIPTION

The T186 series remote wall sensor with setpoint adjustment capability is
specifically designed to be used with Viconics’ R842 electric baseboard relays.
The unique design of the R842 permits solid state proportional and integral (PI)
temperature control via the T186, resulting in exceptional temperature control
accuracy (± 0.5 ºF).

The T186 can replace conventional electro-mechanical thermostats when used
with the R842. Advantages include increased comfort and energy savings.
Typical savings of 3-7% is possible and is attributed to the elimination of wasted
energy inherent in less accurate electromechanical thermostats. Its solid state
design permits the elimination of bimetal elements and mercury bulbs, which
simplifies the installation since there is no anticipator and no levelling required.
In addition, it is an environmentally friendly product.

A pleasing aesthetic design ensures a harmonious blend in most room decors.
The T186 can be directly mounted to any flush vertical surface or to a standard
2” x 4” electrical mounting box via two mounting screws. Celsius and Fahrenheit
models are available.

Using the T186 with the R842 relay will provide unmatched performance and
give years of trouble-free installation.

Fig.1 - T186 wall sensor with setpoint
adjustment

Fig.2 - R842 baseboard relay for electric
heaters

Features Benefits

• Electronic PI performance ⇒ Increased comfort , accuracy, and energy savings

• Solid state design ⇒ Increased reliability

• No bimetal elements ⇒ No need to worry about anticipator settings

• No mercury bulbs ⇒ No levelling required; environmentally friendly

• Fahrenheit or Celsius temperature scale ⇒ Can be sold world-wide

• Elegant aesthetic design ⇒ Blends well in all environments

• Mounts on any surface or standard electrical box ⇒ Increased flexibility

TABLE 1: ORDER CODE

Scale Range Sensor model Replacement cover

5 °C to 30 °C T186C-01 C186C-01

40 °F to 90 °F T186F-01 C186F-01

WIRING DIAGRAM APPLICATION & WIRING

sensor

RED

BLACK

BLUE

Internal circuit

ON

2

1

T186

2 wire non polarized

3

2

1

• Use proper dip switch setting on R842 relay

• Refer to each wiring caution

Viconics T186 PI Wall Sensor

Refer to Fig.3 for wiring diagram of T186 with
one R842 relay.

1 High voltage blue wire is always connected. R842

units are powered devices.

Load side

L1

L2 / N

Junction box

Fig.3 – Wiring diagram of T186 sensor with R842 relay

Set both switch on relay
to

position

OFF

Note: refer to R842 manual for multiple relay application.

2 Provide overload protection and disconnect as

required.

3 Do not use 24 Vac terminal #1 as power supply to an

electronic thermostat. Use a separate transformer.

1

THERMOSTAT INSTALLATION

Important: All wiring must conform to local and
national electrical code regulations. To avoid problems,

carefully follow the procedures below.

A) Location:

1- Should not be installed on an outside wall.
2- Must be installed away from any heat source.
3- Should not be installed near an air discharge grill.
4- Should not be affected by direct sun radiation.
5- Nothing must restrain vertical air circulation to

the thermostat.

Wiring terminal

Security screw

Fig. 4 - T186 wall sensor cover removal and wiring terminal location

TABLE 2: SPECIFICATIONS

Wall Anchor

Pull on plastic tab
to releas e the
printed circuit board

Flip printed circuit
board to access
mounting hole

Fig.5 - T186 wall sensor installation

Security Screw

B) Installation:

1- Remove security screw on the bottom of thermostat cover.
2- Open up by pulling on the bottom side of thermostat.
3- Pull out cables 6” out of the wall.
4- Wall surface must be flat and clean.
6- Insert cable in the central hole of the base.
7- Flip printed circuit board to access mounting hole
7- Align the base and mark the location of the two mounting

holes on the wall. Install proper side of base up.
8- Install anchors in the wall.
9- Insert screws in mounting holes on each side of the base.

DO NOT OVERTIGHTEN

10- Strip each wire 1/4 inch.
11- Insert each wire according to wiring diagram.
12- Gently push back into hole excess wring back into the wall.
13- Press back printed circuit board into place
14- Install the cover, top side
15- Install security screw.

Operating

Conditions:

Storage

Conditions:

-20°C to 50°C ( -4°F to 122°F )
0 % to 95 % R.H. non-condensing

-40°C to 80°C ( -40°F to 176°F )
0 % to 95 % R.H. non-condensing

Sensor: Local 10 K NTC thermistor

Resolution: ± 0.1 °C ( ± 0.2 °F )

Control

accuracy:

± 0.2 ° C ( ± 0.5 °F )
( calibrated )

Ranges: 5 °C to 30 °C or 40 °F to 90 °F

DIMENSIONS

4.94" 125. 5 mm.

4.72" 119. 9 mm.

4.08" 103. 5 mm.

Fig.6 - T186 wall sensor dimensions

3.36" 85.8 mm.

3.20" 81.5 mm.

2.57" 65.2 mm.

All T186 series contr ols are for use as operating controls only and are not safety devices. These instruments have undergone
rigorous tests and ver ific ations prior to shipment to ensure proper and reliable operation in the field. Whenever a control failure
could lead to personal injury and/or loss of property, it becomes the responsibility of the user / installer / electrical panel designer
to incorporate safety devic es ( such as relays, flow switch, thermal protections, etc… ) and/or alarm s ystems to protect the entire
system against such catastr ophic failures. Any abusive use of the product will void the warranty.

NOTE: VICONICS RESERVES T HE RIGHT TO MAKE MODIFICATIONS WIT HOUT PRIOR NOTICE.

Viconics Electronics Inc. 9245, Langelier Blvd, St-Leonard, Quebec, C anada H1P 3K9 www.viconics.com

LIT-T186X-E01

[e-mail]

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