Honeywell W8735B User Manual

W8735B

Telephone Access Module

INSTALLATION INSTRUCTIONS

APPLICATION

The W8735B Telephone Access Module provides remote
telephone access to an HVAC system when used with a
T8635L Microelectronic Communic ati ng Pr ogrammable
Thermostat and a W8635A or W8635B Equipment
Interface Module. The W8735B can be used with
conventional or heat pump applications. The W8735B

Table 1. W8735B Description.

Model Application Terminals Comments

W8735B Remote dial-in and

remote dial-out using a
conventional
telephone line.

1, 2, 3, Aux1,
Aux2, Ln1,
Ln2, Ph1,
Ph2, Line in,
Phone out.

INSTALLATION

When installing this product…

Read these instructions carefully. Failure to follow

1.

these instructions can damage the product or
cause a hazardous condition
Check the ratings given in the instructions and on

2.

the product to make sure the product is suitable for
your application.
Installer must be a trained, experienced service

3.

technician.
After completing installation, use these instructions

4.

to check out the product operation.

can provide remote access of up to nine zones when
used with the W8703A Damper Interface Module(s). See
Table 1.

When used with the C7835A Discharge Temperature
Sensor, additional HVAC diagnostics are available. See
Table 5. The W8735B uses the Enviracom
low cost, wired communications protocol.

Use with T8635L Communicating Thermost at,
W8635A or W8635B Equipment Interface
Module.
Use the W8703A Damper interface Module for
zoning systems.
Use the C7835A Discharge Temperature Sensor
for system diagnostics.

CAUTION

Electrical Shock Hazard.
Can cause personal injury and eq uipment
damage.

Disconnect power before beginning installation.

Location

Locate the W8735B in the equipment room near the
HVAC equipment and where access to the main
telephone line is available. See Fig.1.

™

Network, a

® U.S. Registered Trademark
Copyright © 2000 Honeywell • •All Rights Reserved

Place Bar Code Here

69- 1352

T ELEPHONE ACCES S MODULE

FURNACE OR BOILER

WATER HEATER

Fig. 1. Locating W8735B in equi pm ent room.

W8735B

M14800

Position the subbase on the wall. Level the

6.

W8735B for appearance only; the device functions
properly even when not level. Use a pencil to mark
the position of the mounting holes on the wall.

NOTE: The wiring for the W8735B can be fed through

the back of the subbase or through the knock-

b

a
t
t
e

r

y
a
u
x

i
l
i
a
r
y

i
n
p

u

t

outs at the top and bottom of the subbase. If
using the knockouts, skip steps 7 and 8 and
proceed to step 9.

Mark the center of one or both wiring holes located

7.

in the back of the subbase.
Drill a 5/8 or 3/4 in. hole, where marked, for insert-

8.

ing the wires.
Remove the W8735B from the wall and drill 3/16

9.

in. holes in the wall (if drywall) where marked. For
firmer materials such as plaster or wood, drill 7/32
in. holes. Gently tap the anchors, provided, into the
holes until flush with the wall.
Reposition the W8735B over the holes.

10.

Loosely insert the screws into the holes and tighten

11.

the screws.

Mounting W8735B Telephone Access Module

CAUTION

Equipment Mounting Damage Hazard.
Can damage W8735B when mounted i nsi de
HVAC equipment.

Mount W8735B outside of any HVAC equipment,
where access to main telephone line is available.

Unsnap the front cover from the W8735B by grasp-

1.

ing the tabs near the top of the module. See Fig. 2.
Swing the front cover down and lift it slightly to dis-

2.

engage the hinges.
Remove the cover and set aside.

3.

Remove the subbase by slowly pulling the subbase

4.

from the module housing. See Fig. 3
Locate the two mounting holes on the subbase.

5.

See Fig 4.

b

a

tte

FRONT COVER TABS

GRASP TABS AND

SWING COVER DOWN

ry

a

u

x

ilia

ry

in

p

u

t

o

n

momentary flash - ok

steady flash - replace

on continuously - replace

lin

e

.

SUBBASE

MODULE

M14802

Fig. 3. Removing subbase from m odule housing.

M14801

Fig. 2. Removing front cover.

69-1352 2

TELEPHONE ACCESS MODULE

A

con.

1
2

3
Aux1
Aux2

B

con.

C

con.

D

con.

Line

in

Phone

out

M14778

Line in

Phone out

Ph1
Ph2
Ln1
Ln2

WIRING LABEL

ON INSIDE

OF MODULE

MODULE

WIRING

KNOCKOUT

MOUNTING

HOLE FOR

SUBBASE

MOUNTING
SCREWS (2)

WIRING

HOLE

WIRING

TERMINAL

BLOCK

WIRING

TERMINAL

BLOCK

WIRING

HOLE

MOUNTING

HOLE FOR

SUBBASE

WIRING

KNOCKOUT

Fig. 4. Mounting W8735B subba se.

WIRING

CAUTION

Electrical Shock Hazard.
Can cause personal injury and equipment
damage.

Disconnect power before beginning installation.

Locate the wiring label inside the telephone access

1.

module. See Fig. 5.
Loosen the terminal screws on the W8735B and

2.

connect the system wires. See Fig. 6 through 9
and Table 2.
Securely tighten each terminal screw.

3.

SUBBASE

WALL

WALL
ANCHORS
(2)

M14779

Fig. 5. Locating the wiring label ins ide the module.

TERMINAL BLOCK

WIRE

SCREW
DRIVER

M14803

Fig. 6. Connecting wires to terminals.

Wiring the Communications Bus

Connect terminals 1, 2, and 3 from the Telephone Access
Module to the other network devices. See Fig. 7.

Wiring the Auxiliary Input

Connect Aux1 and Aux2 terminals to an opt ional
normally open sensor contact, not included; see Fig. 7.

3 69-1352

T ELEPHONE ACCES S MODULE

Wire the house telephones to the Phone out con-

Wiring the Telephone

CAUTION

Incorrect Telephone Line Hookup Hazard.
Inability to call out can result in personal
injury or property damage.
Improper installation can r esult in blocked
phone lines and inability to mak e 911 and
other emergency-report i ng phone calls.

Always connect the Telephone Access Module
first in line. When a monitored security system is
installed, connect the Telephone Access Module
second in line.
Observing this practice ensures that Telephone
Access Module drops off the line to allow priority
to the house telephone.

Wire the telephone line from the telephone com-

1.

pany to the Line in connections on the Telephone
Access Module.

IMPORTANT:

Wiring the Telephone Access Module first in line
(or second in line with a monitored security sys­tem) ensures that when any house telephone is
used (such as for an emergency), the Tele­phone Access Module drops off the line and
gives control priority to the house telephone.

Table 2. Terminal Designations.

W8735B Terminal Designations Function

1 To EnviraCom network terminal 1 (data).
2 To EnviraCom network terminal 2 (24 Vac).
3 To EnviraCom network terminal 3 (24 Vac).
Aux1 Auxiliary Input – Connect to N.O. sensor contact.
Aux2 Auxiliary Input – Connect to N.O. sensor contact.

a

Line in
Phone out

Ln1 Line in - Connect to telephone line.
Ln2 Line in - Connect to telephone line.
Ph1 Phone out - Connect to home telephones.
Ph2 Phone out - Connect to home telephones.

b

RJ11 connector – Connect to telephone line.
RJ11 connector – Connect to home telephones

2.

nections (see Table 2) on the Telephone Access
Module.
After the Telephone Access Module installation is

3.

complete, be sure to verify that the emergency
telephone line disconnect is operating corre ctl y.
a. Call the Telephone Access Module using an

outside line (installers use a cell phone).

b. While calling into the Telephone Access Mod-

ule, pick up a house telephone receiver. If you
get a dial tone after a few seconds and the
T e lephone Access Module drops control of the
line, the Telephone Access Module is installed
correctly.

c. If you do not get a dial tone on the hou se tele-

phone, follow the wiring diagrams and rewire
the telephone connections. See Fig. 8 and 9.

IMPORTANT:

Do not le ave t he i ns tall ati on u nti l th e em erge ncy
telephone line disconnect is operating correctly.

a

Connect to

b

Connect to

Line in or use terminals Ln1 and Ln2.

either

Phone out or use terminals Ph1 and Ph2.

either

Wiring Diagrams

See Fig. 7 through 9 for wiring diagrams.

69-1352 4