User Guide

ManualsBrandsBarber Colman ManualsHVAC Replacement PartsThree Stage Thermostat w/ 20' Capillary (10-90F)

Application

These units are used for on-off control of media

temperature in ducts, tanks, etc.

Features

• Mechanism enclosed in rugged die cast case with

metal cover.

• Large coded terminals.

• Liquid-filled thermal element actuates one snap-

acting SPDT per stage.

• Setpoint adjustment knob is clearly marked and has

recessed locking screw.

• Copper thermal element is suitable for either

immersion or duct mounting.

Applicable Literature

• TAC Cross-Reference Guide, F-23638

• TAC Reference Manual, F-21683

• TAC Application Manual, F-21335

• TAC Electric/Electronic Products Catalog, F-27382

• Material Safety Data Sheet MSDS-1

TC-202, TC-252,

and TC-271 only

are UL Listed.

TC-200 Series

Single Bulb Thermostats

General Instructions

Summary of content (12 pages)

PAGE 1
TC-200 Series Single Bulb Thermostats General Instructions Application These units are used for on-off control of media temperature in ducts, tanks, etc. Features • Mechanism enclosed in rugged die cast case with metal cover. • Large coded terminals. • Liquid-filled thermal element actuates one snapacting SPDT per stage. • Setpoint adjustment knob is clearly marked and has recessed locking screw. • Copper thermal element is suitable for either TC-202, TC-252, and TC-271 only are UL Listed.
PAGE 2
SPECIFICATIONS Setpoint Adjustment Range: Setpoint dial marked in °F. See Table-1 for specific ranges. Sensing Element: Liquid-filled thermal element. Electrical Switch: One snap-acting SPDT per stage. Ratings, See Table-1. Connections: Coded terminals. Case: Rugged die cast with metal cover. Half inch conduit openings at top and bottom. Ambient Temperature Limits: Case, -40 to 140°F (-40 to 60°C). Bulb, 230°F (110°C). Output: Switch action is adjustable. See Table-1. Dimensions: Case, See Figure-18.
PAGE 3
High Medium B C Low B C Temp. Drop R B Heat C Temp. Drop R R High B Low Second stage R Med. B Med. Third stage R Low B High R makes on temp. drop. R Temp. Drop Cool First stage Figure-3 Typical of TC-282,Three Stage. Stage 4 Cool Stage 3 Cool R NC C B NO R NC B NO C Stage 2 Cool R Stage 3 Front Top Stage 4 Rear Top Stage 2 Front Bottom Stage 1 Rear Bottom S1 Stage 1 Cool S2 B Common C NC B NO R C NC B NO R C C is common of a single pole, double-throw switch.
PAGE 4
Bulb Mounting The remote sensing bulb may be mounted in ducts or liquid lines. Outdoor Install with AT-211 kit as shown in Figure-5. 1. Mount bulb to outside wall or surface with bulb clip. 2. Place shield over bulb and fasten to mounting surface. V V Shield Clip Figure-5 Outdoor Bulb Mounting. Duct Install bulb with AT-208 kit as shown in Figure-6 below. Cut 3/4" Dia. Hole in Duct Cut 7/8" Dia.
PAGE 5
CALIBRATION: SINGLE STAGE THERMOSTATS — TC-202 Adjustments Cut 1 Cut 2 Cut 3 Figure-9 Adjustment of Single Stage Thermostats. Dial The dial setting determines the operating point of the thermostat. It may be locked in place by tightening the recessed Allen set screw in the top of the dial shaft (see Cut 1 in Figure-9). Differential The differential between the two contacts of the SPDT switch is easily adjusted by means of the differential adjustment screw on the thermostat arm (see Cut 2 in Figure-9).
PAGE 6
CALIBRATION: TWO STAGE THERMOSTATS — TC-252 and TC-271 Adjustments Figure-11 Dial Adjustment of Two Stage Thermostats. Dial The dial setting determines the operating point of the low stage switch. It may be locked in place by tightening the recessed Allen set screw in the top of the dial shaft (see Figure-9). Differential The differential between the “R” and “B” contacts of the SPDT switches is easily adjusted by moving the contact spring on the thermostat arm (see Figure-12).
PAGE 7
Calibration Procedure After differential adjustments have been made, the unit should be calibrated as follows: 1. Immerse the sensing bulb for about 10 minutes in any medium of known temperature. 2. Turn dial to setting corresponding to bulb temperature. 3. Turn calibration screw (see Figure-12) until the switch actuating points, as indicated by the dial of the low stage switch, straddle the bulb temperature.
PAGE 8
CALIBRATION: THREE STAGE THERMOSTATS — TC-282 Adjustments Figure-14 Dial Adjustment of Three Stage Thermostats. Dial The dial setting determines the operating point of the low stage switch. It may be locked in place by tightening the recessed Allen set screw in the top of the dial shaft (see Figure-9). Differential The differential between the “R” and “B” contacts of the SPDT switches is easily adjusted by moving the contact spring on the thermostat arm (see Figure-15).
PAGE 9
d. Continue moving dial in same direction until high stage switch just clicks (makes to “B”) and note dial reading at this point. e. The difference in dial readings, as noted, indicates the differential between stages. For example, if the high, middle, and low stages click (make to “B”) at 71°F, 77°F, and 84°F, respectively, then the differential between the high and middle stages is 6°F (77 – 71) and between the middle and low stages is 7°F (84 – 77).
PAGE 10
CALIBRATION: FOUR STAGE THERMOSTATS — TC-288 Adjustments Dial The dial (a) setting (see Figure-17) determines the operating point of the first, or low, stage switch. It may be locked in place by tightening the recessed Allen set screw in the top of the dial shaft (see Figure-16). Figure-16 Dial Adjustment of Four Stage Thermostats.
PAGE 11
4. To check differential between stages: a. Turn regulating knob well above calibration point. b. Start turning know slowly toward calibration point until the first stage switch just clicks (makes to “B”) and note dial reading at this point. c. Continue turning knob in same direction until the second stage switch clicks (makes to “B”) and note dial reading at this point. d. Continue turning knob in the same direction until the third stage switch clicks (makes to “B”) and note dial reading at this point. e.
PAGE 12
DIMENSIONAL DATA Note: 3/4" (19 mm) above this point must be allowed for min. bend radius of capillary tubing. V 1-7/16" V 1-1/8" V V V V V V V V V V V 1-5/16" B V V 5/8" 4-5/16" 1/4" Dia. V 1-7/8" 5/8" 15/16" V V C Stages V 11/16" 11/16" Dimensions (inches) A B C Single, two 2-11/16 2-1/2 5-1/4 Three, four 4-9/16 4-3/8 7-1/8 Figure-18 Mounting Dimensions.