Honeywell T7460C, T7460A, T7460D, T7460B, T7460F Manual

® U.S. Registered Trademark

Copyright © 2005 Honeywell Inc. • All Rights Reserved 74-3083-2

T7460A,B,C,D,E,F

WALL MODULES

HONEYWELL EXCEL 5000 OPEN SYSTEM

SPECIFICATION DATA

FEATURES

• Mountable on 2.36 in. (60 mm) wall outlet box or

directly on a wall.

• Models with setpoint adjustment.

• Models with bypass (override) button and LED.

• Models with 3-position (auto/0/1) or 5-position

(auto/0/1/2/3 speed) fan switch.

• Setpoint dials with Celsius relative or Celsius absolute

scale.

• Locking cover on all models.

• Operating range 43…104°F (6…40°C).

• CE-approved.

• IP 30 housing.

GENERAL

The T7460A,B,C,D,E,F are a family of direct-wired wall

modules for use with Honeywell Excel 10 W7750, W7751,

W7752, W7753, W7761, W7762, W7763, and Excel 600,

500, 100, 50, 20 Controllers. All models have a space

temperature sensor; some models have setpoint adjustment,

bypass button and LED, and fan switch.

DESCRIPTION

The T7460A,B,C,D,E,F packages include two setpoint dials.

By default, the “Celsius Relative” type (-5 … +5) is mounted,

but can be easily replaced with the “Celsius Absolute” type

(12…30°C).

T7460A,B,C,D,E,F WALL MODULES

74-3083-2 2

SPECIFICATIONS

Table 1. T7460 Wall Module models

type no. setpoint adjustment

bypass

(override)

button and

LED

fan switch

3- or 5-

position

compatible with

T7460A -- -- --

W7750A,B, W7751B,D,F,H, W7752D,E,F,G, W7753A, W7761A,

W7762A,B, W7763C,D,E, and

Excel 600, 500, 100, 50, 20

T7460B -- --

W7750A,B, W7751B,D,F,H, W7752D,E,F,G, W7753A, W7762B,

W7763E, and

Excel 600, 500, 100, 50, 20

T7460C 3 --

W7750A,B, W7751B,D,F,H, W7752D,E,F,G, W7753A,

W7762A,B, W7763D,E, and

Excel 600, 500, 100, 50, 20

T7460D -- 5

W7752D,E,F,G, W7753A, and

Excel 600, 500, 100, 50, 20

T7460E 3 3

W7750A,B, W7752D,E,F,G, W7753A, and Excel 600, 500, 100,

50, 20

T7460F

12…30 °C (absolute)

± 5 K (relative)

3 5

W7752D,E,F,G, W7753A, and

Excel 600, 500, 100, 50, 20

NOTE: Not all of the T7460 Wall Modules are compatible with W7751A,C,E,G (VAV1) and W7752D1 (FCU1) controllers.

NOTE: Refer to T7460A,B,C,D,E,F Installation Instructions (product literature no.: EN1B-0291GE51) for wall module settings

and wiring diagrams.

Construction:

Two-piece construction: cover and internally wired subbase.

Field wiring 16 to 22 AWG (1.5 to 0.34 mm

2

) connects to a

terminal block on the PCB.

Temperature Sensor Operating Range:

43…104°F (6…40°C).

T7460A,B,C,D,E,F 20kΩ Sensor:

All T7460 models are furnished with a 20kΩ NTC temperature

sensor following a specific temperature-resistance curve. See

Fig. 1. Honeywell controllers used with the T7460 employ an

algorithm that provides readings close to the actual

temperature. Table 2 summarizes the T7460 sensor accuracy

for normal operating temperatures. Throughout the range of

43…104°F (6…40°C), the accuracy is better than ±0.75°F

(±0.42°C).

Table 2. Temperature sensor accuracy

ambient temp.

°F (°C)

max. error

°F (°C)

nom. resistance

(Ω)

60 (15.5) ±0.52 (±0.29) 31543

65 (18.3) ±0.49 (±0.27) 27511

70 (21.1) ±0.48 (±0.27) 24047

80 (26.7) ±0.49 (±0.27) 18490

85 (29.5) ±0.52 (±0.29) 16264

80 K

70 K

60 K

50 K

40 K

30 K

20 K

10 K

30

0 10 20 30 40

40 50 60 70 80 90 100 110

°

F

°C

temperature (degrees)

elec

t

r

ical

r

e

s

i

s

t

ance (

o

hm

s

)

Fig. 1. Temperature vs. resistance for 20kΩ sensor

T7460B,C,D,E,F Setpoint Adjustment:

In the case of wall modules equipped with setpoint adjust-

ment, depending on the type of setpoint dial in use, the con-

troller must be set for either the relative or the absolute scale.

The relation between setpoint and resistance is given in Table

3. Accuracy of resistance is:

• ±5% in middle position, e.g. 5225 Ω to 5775 Ω;

• ±10% in end position, e.g. 9450 Ω to 11550 Ω.