Honeywell T915 Product Information Sheet

T915A-D,F,M,P

Proportional Temperature

Controllers

Remote bulb temperature controllers for ducts, tanks, boilers, pipes, and other heat exchangers. These controllers are used with modulating motors for proportional control of three-wire, low-voltage valves or damper motors.

■T915M and T915P have spdt switches to control Series 20 motors. T915M controls at high or low end; T915P controls at low end.

■Controllers may be used to regulate temperatures of either air or liquids.

■All models ambient compensated.

■Capillary tubing allows remote bulb mounting up to 20 ft (6.0m) from controller case.

■Temperature setting scale markings in both Fahrenheit and Celsius.

■Steel case with clear plastic cover makes settings readily visible.

■Surface mounting using two screws through back of case.

CONTENTS
Specifications .................................................	2
Ordering Information .....................................	2
Installation .....................................................	4
Operation .......................................................	6
Settings and Adjustments ................................	6

S. M. • Rev. 10-94 • ©Honeywell Inc. 1994 • Form Number 60-2201—7

T915A-D,F,M,P

SPECIFICATIONS • ORDERING INFORMATION

Specifications

MODELS (also refer to Table 1):

T915A: One potentiometer for controlling a modulating motor. Nonadjustable throttling range.

T915B: Two potentiometers for controlling two modulating motors in unison or in sequence, factory set for unison control. Nonadjustable throttling range.

T915C: One potentiometer for controlling a modulating motor. Adjustable throttling range.

T915D: Two potentiometers for controlling two modulating motors in unison. Adjustable throttling range.

T915F: Two potentiometers for controlling two modulating motors in sequence. Adjustable deadspot between potentiometers and adjustable throttling range.

T915M and T915P: One potentiometer and Series 20 contacts for controlling one modulating motor and one

Series 20 motor or relay in sequence on a temperature rise. The Series 20 contacts on the T915M operate above the throttling range and the Series 20 contacts on the T915P operate below the throttling range. Both models have nonadjustable throttling ranges and differentials.

BULB HOLDER: Furnished with copper elements. RANGES: Fahrenheit and Celsius on the same scaleplate. TEMPERATURE SETTING: Screws on top of controller

provide main and differential adjustment. ELECTRICAL RATING: Low voltage ac only. POTENTIOMETER: Standard 135 ohm. Available with

280 ohm potentiometer in some models; see Table 1. FINISH: Gray enamel.

DIMENSIONS: See Fig. 1.

Fig. 1—Mounting dimensions in in. (mm).

			4-1/2
	2-3/4 (70)		(114)
			3-13/32
			(87)
	1-1/16	MOUNTING HOLE	1-5/32
		KNOCKOUTS (2)
	(27)		(29)
		13/16
		(21)
		3-23/32	1-3/32
	5-1/32		(28)
		(95)
	(128)
		7/8 (22.2) DIA.
	3-7/8
	(98)
			1-13/16
	5-1/2		(46)
	(140)	13/16
		(21)

1-3/16

(30)

M7358

Ordering Information

When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the TRADELINE®

Catalog or price sheets for complete ordering number, or specify—
1.	Order number.	4.	Capillary length.
2.	Scale range.	5.	Accessories, if desired.
3.	Bulb size.

If you have additional questions, need further information, or would like to comment on our products or services, please write or phone:

1.Your local Home and Building Control Sales Office (please check the white pages of your phone directory).

2.Home and Building Control Customer Logistics Honeywell, Inc., 1885 Douglas Drive North Minneapolis, Minnesota 55422-4386 [phone]

In Canada—Honeywell Limited/Honeywell Limitée, 740 Ellesmere Road, Scarborough, Ontario M1P2V9. International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France, Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.

60-2201—7

2

ACCESSORIES:

1.33312B Knurled Knob for finger adjustment of temperature setpoint.

2.311266D Bulb Holder for mounting sensing bulb in an air duct (furnished with some models).

T915A-D,F,M,P

SPECIFICATIONS

3. Immersion well assemblies or pressure fittings—see appropriate Honeywell specification or TRADELINE® Catalog to order. Wells available in copper and stainless steel.

TABLE 1—T915 TEMPERATURE CONTROLLER MODELS.

Maximum

Scale

Throttle

Bulb

Potenti

-

Temp -

Capillary

Type

ometer

Model

Range

Range a

erature

(Copper)

Size of Bulb

of

Resistance

Number

°F

°C

°F

°C

°F

°C

ft

m

in.

mm

Fill b

(ohms)

Controls

T915A

15 to 90

-9 to +32

3,

1.7,

200

93

5

1.5

1/2 x 4

13 x 102

LTD

135

1 modulating

fixedc

fixedc

motor

T915B

15 to 90

-9 to +32

3,

1.7,

130

54

5

1.5

11/16 x

17 x 368

CA

135

2 modulating

fixedf

fixedf

14-1/2

motors in

unison or

d

sequence

T915C

15 to 90

-9 to +32

7 to 38

3.9 to

200

93

11

3.4

1/2 x 4

13 x 102

LTD

135

1 modulating

21.1

motor

T915C

15 to 90

-9 to +32

7 to 38

3.9 to

200

93

20

6.1

1/2 x 4

13 x 102

LTD

135

21.1

T915C

15 to 90

-9 to +32

7 to 38

3.9 to

130

54

5

1.5

11/16 x

17x 368

CA

135

21.1

14-1/2

T915C

15 to 90

-9 to +32

7 to 38

3.9 to

130

54

15

4.5

11/16 x 7

17 x 177

CA

135

21.1

T915C

15 to 90

-9 to +32

7 to 38

3.9 to

130

54

5

1.5

11/16 x

17 x 368

CA

280

21.1

14-1/2

T915C

80 to 210

27 to 99

6 to 32

3.3 to

230

110

5

1.5

1/2 x 4

13 x 102

HT

135

17.8

T915C

80 to 120

27 to 99

6 to 32

3.3 to

230

110

20

6.1

1/2 x 4

13 x 102

HT

135

17.8

T915D

15 to 90

-9 to +32

7 to 38

3.9 to

130

54

5

1.5

11/16 x

17 x 368

CA

135

2 modulating

21.1

14-1/2

motors in

T915D

15 to 90

-9 to +32

7 to 38

3.9 to

130

54

20

6.1

11/16 x

17 x 445

CA

135

unison

21.1

17-1/2

T915D

105 to

40 to 105

9 to 39

5.0 to

240

116

5

1.5

1/2 x 4

13 x 102

HT

135

220

21.7

T915F

15 to 90

-9 to +32

8 to 52

4.4 to

130

54

5

1.5

11/16 x

17 x 368

CA

135

2 modulating

28.9

14-1/2

motors in

T915F

15 to 90

-9 to +32

8 to 52

4.4 to

130

54

20

6.1

11/16 x

17 x 445

CA

135

sequence

28.9

17-1/2

T915M e

15 to 90

-9 to +32

3,

1.7,

130

54

5

1.5

11/16 x

17 x 368

CA

135

1 modulating

fixedc

fixedc

14-1/2

motor and 1

T915M

105 to

40 to 105

3,

1.7,

240

116

5

1.5

1/2 x 4

13 x 102

HT

135

Series 20 motor

220

fixedc

fixedc

or relay

T915P f

15 to 90

-9 to +32

3,

1.7,

130

54

5

1.5

11/16 x

17 x 368

CA

135

fixedc

fixedc

14-1/2

a

Throttling range adjustable except where noted.

b

LTD—Limited-fill elements require that controller, including all of capillary (except bulb and adjacent 4 in. [102 mm] of capil

lary), be in an ambient

temperature at least 10°F (5.6°C) above bulb temperature. These controllers become inoperative when temperature of controlled air or liquid is above 120°F

(49°C).

HT—High-temperature-fill elements require that controller and all of capillary (except bulb and adjacent 4 in. [102 mm] of capi

llary) be in an ambient

temperature at least 10°F (5.6°C) below bulb temperature.

c

CA—Cross ambient.

Wiper moves toward W on temperature rise.

d

Factory set for unison control.

e

Spdt contacts operate approximately 1°F (0.6°C) above the throttling range (0.5°F [0.3°C] differential at midscale).

f

Spdt contacts operate approximately 1°F (0.6°C) below the throttling range (0.5°F [0.3°C] differential at midscale).

3

60-2201—7