Barber Colman TC-1191 User Guide

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Page 1

Application

TC-1191 Series

Two-Po siti o n, Ne ut ral Center

Electric Room Thermostats

General Instructions

The TC-1191 series electric room thermostats, with neutral center, are used for low or line voltage On-Off control of heat/cool systems such as three- or four-pipe unitary configuration.

Features

• Anticipator available for improved performance can

be used for heating or cooling.

• Auto control of heating and cooling without external

switching means.

• UL and CSA models available for line voltage

control.

• Night depression capability.

Applicable Literature

• TAC Environmental Controls Cross-Reference

Guide F-23638

†

TC-1191

TC-1191 with Digital

Thermometer Kit Installed

• TAC Environmental Controls Reference Manual

F-21683

• TAC Environmental Controls Application Manual

F-21335

• Environmental Control Systems Catalog F-16650

TC-1191-770

†See Table-3 for agency approvals.

F-18781-2

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SPECIFICATIONS

Part Number

TC-1191 TC-1191-116 13 to 29°C TC-1191-500 55 to 85°F TC-1191-602 55 to 85°F TC-1191-770 Robertshaw 55 to 85°F

Sens ing Ele m ent: Bimetal operated snap action SPDT switch with neutral center. Differential: 2°F (1°C) on heat, 2°F (1°C) on neutral, 2°F (1°C) on cool. Connections: Color coded 6" leads. Cover: Plastic as standard. Mounting: Flush or surfa ce switch box or directly on wall (24 Vac only). Dimensions: 4-3/8" high x 2-7/8" wide x 1-5/8" deep ( 111 mm x 73 mm x 43 mm).

Table-1 Specifications.

Company

Identification

BarberColman

*Dial stop pins included to limit dial range.

Control*

Dial Range

55 to 85°F

Full Load Amps Locked Roto r Amps

24/12 0 Vac 240 Vac 24/120 Vac 240 Vac

4.4,

Orange to

Brown L ead

3.0, Orange to Red Lead

2.2,

Orange to

Brown L ead

1.5, Orange to Red Lead

26.4,

Orange to

Brown L ead

18,

Orange to

Red Lead

13.2,

Orange to

Brown L ead

9, Orange to Red Lead

Pilot Duty

40 @ 24 Vac

120/24 0 Vac

Table-2 Standard Units Include the Following.

Quantity Description

1 Blank cover insert 1 Cover insert wi th setpoint dial cutout 1 5/64" Allen head screw for securing cover to thermostat base 1 5/64" Allen wrench 2 Dial stop pins to limit setpoint range

(VA)

210 @

Table-3 Agency Approvals.

Configuration Part Number UL Listed CSA Certified

Metal cover option TC2-1191* No Yes

TC-1191 Yes No

Plast i c co v er

Heat an ti ci pation or nig h t depression options

*Only available as factory assembly. Do not convert from plastic to metal cover in the field.

TC-1191-116 Yes No TC-1191-770 Yes No TC-1191-500 No No TC-1191-602 No No

Standard C over

TC-1191 TC-1191-116 TC-1191-770 TC-1191-500 Parallel heati ng or cooling anticipati on, 24 Vac TC-1191-602 10°F night depressi on, 24 Vac

with

TC-1191 Standard

Insert Insert

with

ROBERTSHAW

TC-1191-770

Standard

ROBERTSHAW

Insert Insert

ROBERTSHAW

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Options (for quantities of 24 or more each part number)

Add “dash-number” (-XXX) suffix to base part number for desired option. For metal covers, specify TC2-1191.

°F°CTC-1191-399

TC-1191-398

-400

-410

†5/64" Allen screw used to secure cover.

-403†

-413†

ACCESSORIES

AT-61 Series Brushed bronz e cover plates (TAC Barber-Colman only) AT-70 Series Brushed bronze cover plates (Robertsh aw only) AT-82 °F digital thermometer cover kit (TAC Barber-Colman only) AT-82-116 °C digital thermometer cover kit (TAC Barber-Colman only) AT-82-770 °F digital thermometer cover kit (Robertshaw only) AT-101 Lock cover kit AT-504 Plaster hole cover kit (small) AT-505 Surface mounting base AT-546 Auxil iary mounting plate AT-602 Selector switch sub-base DP4T AT-603 Selector switch sub-base one DP4T, one DPDT AT-1100 Series Thermost at guards PKG-1093 Digital therm om e ter ba tte ry replac em ent kit TOOL-11 Calibration wrench TOOL-13 Contact burnishing tool

Orange

Brown

Black/Red

Night Depressor

(Optional)

Black/Yellow

Black/Yellow Heat Anticipator or Cooling Anticipator

(Optional)

(See wiring diagram.)

Red

Temp. Drop

Brown makes ON temperature drop.

-404†

-414†

Figure-1 Switch Action and Terminal Identification.

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TYPICAL APPLICATIONS

Red (Cooling)

Red

Parallel Heat Anticipation

Cooling Anticipation

Drop

Temp.

Brn.

Org.

Blk./Yel. Blk./Yel.

Night Depression (certain models)

Load

Source Voltage

Blk./Red –To Night

Blk./Red –Switch and

Figure-2 Typical of Parallel Heat Anticipation with or without Night Depression.

(Heater size determined by voltage.)

Drop

Temp.

Brn.

Org.

Blk./Yel. Blk./Yel.

Night Depression (certain models)

Load

Source Voltage

Blk./Red –To Night

Blk./Red –Switch and

Figure-3 Typical of Cooling Anticipation with or without Night Depression.

(Heater size determined by voltage.)

Depression

Power Supply

Depression

Power Supply

INSTALLATION Inspection

Requirements

Red (Cooling)

Drop

Temp.

Brn.

Heat

Org.

Common

Night Depression

Load

Source Voltage

Blk./Red –To Night

Depression

Blk./Red –Switch and

Power Supply

Figure-4 Typical Night Depression.

Inspect the car ton for damage. If damaged, not if y the appropriate carr ier immediately. Inspect the device for obvious damage. Return damaged products.

• Job wiring diagrams

• Appropriate accessories

• Trai ning: Installer must be a qualified, experi enced technician

W A R N I N G

• Disconnect the power supply (line power) before installation to prevent equipment damage.

• Make all connections in accordanc e with the wiring diagram and in accordance with

national and loca l electr ical codes. Class I wiring is required unl ess all ci rcuits to cont acts are powered from a Class II sour ce.

Use copper conductors onl y.

• Do not loc ate the thermostat near sources of heat or cold such as lamps, motors,

sunlight, or concealed ducts or pipes, or where there is a danger of electr ocution (i.e., shower rooms).

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Mounting

C A U T I O N

• Do not exceed ratings of the device(s).

• The thermostat is not designed for service in any location where condensation may

occur. Avoid locations where excessive moisture, corro sive fumes, or vibration is present. NEMA Type 1 covers are intended f or i ndoor use primarily to provide a degree of protection against contact with the enclosed equipment.

• Thermostats with guards tha t restrict air flow must have heating or cooling anticipation.

The thermostat re quires upright mounting on a flat vertical surf ace. Locate the thermost at where it is exposed to unrestrict ed circulation of air which represents th e average temperature of the controlled space.

1. Pull all wires from source to thermostat location.

2. Make electrical connection to t herm ostat (see Figure-2 through Figure-4).

3. Remove thermostat cover and fasten thermostat to box or wall (see Figure-5).

4. Attach thermostat cover (see Figure-5).

CHECKOUT

Thermostat Mounting

Screws (2)

Thermostat

Cover Screw

Figure-5 Thermostat Mounting.

After installing a thermost at, make an initia l check of the switching action. Verify the switch action by l istening to and watching the switch contacts or by usi ng a voltmeter between the proper sides of the swi tch.

1. Run the set po in t dial to a t e mpe rat u re ab ov e am bie n t. This sh ou ld ca us e the t he rmo st at to make a circuit between the orange and brown leads.

2. Slowly turn the setpoint dial sett ing to a lower temperature. This breaks the circuit between the orange and br own leads. The contact blade i s in a neutral position between the two contacts (not making a circuit to eith er contact). Turn the setpoi nt further down to again lower the temperature. This causes the thermostat to make a circuit between the orange and red lead s.

Rounded Tab Up

Mounting Plate

Switch Box

CALIBRATION

All ther mo stats are cali brated at the factory and normally do not require any such attention. However, if recali bration is necessar y for any reason, proceed as follows:

W A R N I N G

Turn Off control power and power to night depression circuit, where applicable.

1. Set temperature dial 2°F (1°C) below actual stable room temperature, as read from an accurate thermometer.

2. Remove cover (see Figure-5).

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C A U T I O N

Do not breathe on the thermostat or handle excessively as thi s affects the accuracy of the final calib ration.

3. If the contact blade is made to the left (red lead) contact, use a 1/8" blade screwdriver to turn the cali brati on scre w counter cl ockwise (looki ng at head o f scre w) unti l the blade floats between the contacts.

N O T E

Each complete turn of the sc rew changes calibration approximately 15° F (8°C).

4. Now turn the screw very slowly clockwise unti l the blade just makes the left (re d lead) contact. The the rmostat is now properly cali brated.

5. If the contact blade is originall y m ade to t he ri ght (brown lead) contact or is floating between contacts, turn the calibration screw slowly clockwise until the element just makes the left (red lead) contact. The therm ostat is now properly cali brated.

6. Replace the thermostat cover (see Figure-5).

7. Turn on the control power.

8. Recheck calibration about 30 minute s later to be sure heat from handli ng did not r esult in erroneous set ti ng.

MAINTENANCE

Location for Anticipation Resistor, if used

Common

Red

Thermostat Contacts to Red and Brown Wires

Be sure that the air convection holes in the thermostat cover do not become clogged or covered. This causes improper temperat ure sensing.

Brown

Figure-6 Part Identification.

Location for Night Depression Resistor, if used

Calibration Screw

W A R N I N G

After long periods of continual use, it may become necessary to clean the contacts of any excess co ntact buildup. Before proceeding, be sur e that either the electri cal connections to the thermostat are disenga ged or that the power to the circ uit is broke n. Now clean the con tacts using TOOL-13 contact burnishing tool.

FIELD REPAIR

These thermostats are not field repair able. Replace entire device.

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F-18781-4

TAC

1354 Clifford Avenue P.O. Box 2940 Loves Park, IL 61132-2940

www.tac.com