ESL 700 Series, 702RE, 702U, 713-5U, 702RU Installation Sheet

Number

Head (sold separately from base)

711U

713

721U

remote test

721UT

731U

741U

photoelectric smoke detector with alarm relay

741UT

731L

Base (sold separately from head)

701U

Number

702E
10PKG

702U

702RE

702RU

Head

TS7

with alarm relay

[1] UL Listed for releasing devices such as electromagnetic door
holders, fire dampers, or smoke dampers.

Number

204

211

706U1A

ndicator with red alarm LED, for use with

706U2A

706U3A
SM
SM

[1] The remote alarm/trouble LED
706U3A models work
741U/741UT models when connected as shown

7 and

Figure

[2] 706U2A and 706U3A only work with the 721U/721UT
models, when connected as shown in Figure 6 item 6.

ESL 700 Series Conventional Smoke and Heat
Detector Installation Sheet

Description

Six-terminal base for all heads; 4 in. (10 cm)

Six-terminal base for 731U, 4 in. (10 cm)

Six-terminal base for 731U, 6 in. (15 cm)

(NO) output and remote alarm/trouble LED output

Description

The ESL 700 Series smoke or smoke with rate-of-rise heat
detectors have field-replaceable optical chambers. The
detector uses an optical sensing chamber to detect smoke and
a fixed-temperature heat sensor to detect heat from fire. For a
list of model numbers, see Table 1. For a list of accessories,
see Table 2.

-

Six-terminal base for all heads, 6 in. (15 cm)

with base (sold together)

-4 Four-wire photoelectric smoke detector

High voltage (120 V) base and head

The 702RE and 702RU bases have a special plastic protrusion
built in to prevent insertion of a low-voltage detector head into

a base containing damaging high voltages (120 V). These

bases can only be used with 731U heads. The 731U includes
auxiliary relay contacts and is only required when connecting
high voltage to the auxiliary relay.

Note: The 731U heads can also be used with 702E and 702U

bases for low voltage applications.

Table 1: Model numbers

Description

Two-wire photoelectric smoke detector head

-5U Two-wire rate-of-rise and 57°C (135°F) fixed
temperature heat detector head

Two-wire photoelectric smoke detector, with

input and remote alarm/trouble LED output

Two-wire photoelectric, with rate-of-rise heat detector

head with remote test, alarm/trouble LED output

[1] Two-wire photoelectric smoke detector head with

auxiliary relay (NC/NO) output

Four-wire

(NO) output and remote alarm/trouble LED output

Four-wire photoelectric smoke and rate-of-rise heat

detector head, alarm relay (NO) output and remote
alarm/trouble LED output

(OEM only, not for resale) see 731U description

Three-terminal base for 711U and 713-5U heads, 6 in.

(15 cm) base, connectors

© 2014 UTC Fire & Security Americas Corporation, Inc. 1 / 6 P/N 13083-EN • REV J • ISS 10APR14

Table 2: Accessories

Description

-12/24V End-of-line, power supervision relay for four-wire
applications

-10PKG Replaceable optical chamber for ESL smoke
detectors (set of 10)

[1] Remote i

721U and 741UT

[1][2] Remote indicator with red alarm LED and keyed

remote test, for use with 721U and 721UT

[1][2] Remote indicator with red alarm LED, keyed

remote test and reset, for use with 721U and
741UT

-200 Smoke! In A Can (canned smoke) for functional
testing of smoke detectors

-EXT1 Extension tube for Smoke! In A Can

on the 706U1A, 706U2A, and

s with both two-wire 721U/721UT and four-wire

in Figure 6 item

7 item 11.

two-wire

Installation

(1) Smooth ceiling
(2)

acceptable mounting area

(3) Wall

(5) 12 in. (300 mm) max.

(1) Base cover
(2)

the head

(3) Gasket

(5)

(1)

(2)

(3)

(4)

(2)

(3)

(4)

(1)

Notes

• Locate detectors in an operating environment as defined
in “Specifications” on page 6.

• Mount detectors on a firm, permanent surface.

Placement and spacing

Use the following location guidelines to optimize performance
and reduce the chance of false alarms.

Smoke detectors:

• Locate wall-mounted smoke detectors so the top of the
detector is no lower than 12 in. (30 cm) below the ceiling.
See Figure 1.

• As a guide, space smoke detectors on smooth ceilings
30 ft. (9.1 m) apart. When determining other spacing,
consider ceiling height, high air movement, and other

conditions or response requirements. Refer to NPFA 72.

• Locate detectors away from air conditioners, heating

registers, and any other ventilation source that may
interfere with smoke entering the unit; also away from
kitchens, wood stoves, garages, furnaces, and bathrooms.

Heat detectors:

• Do not install heat detectors in areas with an ambient
temperature above 100°F (38°C).

Figure 1: Smoke detector placement

Gray indicates the

Figure 2: The six-inch diameter mounting base

(4) Floor

• Mount heat detectors on the ceiling no closer than 4 in.
from the sidewall. On the wall, mount them between 4 and
12 in. from the ceiling.

• When determining detector placement, consider ceiling
height, construction, and ventilation as these affect a
detector’s performance. Refer to NPFA 72.

Installing the base

Select a compatible electrical box for the base. See
“Specifications” on page 6 for a list of compatible electrical
boxes.

The 6-inch diameter bases have three parts; the base itself
that mounts on the electrical box or ceiling, a foam gasket, and
the base cover that conceals the mounting screws (see
Table 1 for model numbers and descriptions). The 6-inch
diameter bases are shipped loosely coupled to the base cover.

Screwdriver slot to unlock

(4) Base

2 / 6 P/N 13083-EN • REV J • ISS 10APR14