77-6268: T4057A and B Automatic Fire Detectors. CSI 3-Part Specifications.

T4057A and B Automatic Fire Detectors

Description

The T4057A and B Automatic Fire Detectors are used with Fire Detection and Alarm System Panels to provide positive, rapid fire detection. They are low profile ceiling mounted devices that serve as temperature actuated switches to initiate an audible alarm signal or other alarm output.

Specifications

Models:

• T4057A Automatic Fire Detector: Combination rate-of-rise and fixed temperature
• T4057B Automatic Fire Detector: Fixed temperature only

Electrical Ratings:

3A, 6 to 125V ac
lA, 6 to 28V dc
0.3A, 125V dc
0.1 A, 250V dc

Switching:

Available with either one or two sets of normally open (n.o.) contacts. Contacts on temperature rise.

Dimensions In Inches (Millimeters):

Wiring Terminals:

Double screw terminals at each connection to facilitate loop wiring

Finish:

Flat white paint

Rate-Of-Rise Setting:

Approximately 15F (9C) per minute

Maximum Coverage:

T4057A: 2500 sq ft (232 sq m); spacing 50 ft (15m) centers;
   25 ft (7.6m) to side wall or partition
T4057B: 625 sq ft (58 sq m); spacing 25 ft (7.6m) centers;
   12.5 ft (3.8m) to side wall or partition

Fixed-Temperature Setting:

135F (57C) or 200F (93C)

Detector Identification:

Commercial Buildings Group
Honeywell Inc.
Honeywell Plaza
Minneapolis, Minnesota 55408

77-6286-2    MLF  TAB: III.B.2    Rev. 6-89

Honeywell Limited - Honeywell Limitée
155 Gordon Baker Road
North York, Ontario
M2H 3N7