W8735B
Telephone Access Module
INSTALLATION INSTRUCTIONS
can provide remote access of up to nine zones when
used with the W8703A Damper Interface Module(s). See
Table 1.
APPLICATION
The W8735B Telephone Access Module provides remote
telephone access to an HVAC system when used with a
T8635L Microelectronic Communicating Programmable
Thermostat and a W8635A or W8635B Equipment
Interface Module. The W8735B can be used with
conventional or heat pump applications. The W8735B
When used with the C7835A Discharge Temperature
Sensor, additional HVAC diagnostics are available. See
™
Table 5. The W8735B uses the Enviracom Network, a
low cost, wired communications protocol.
Table 1. W8735B Description.
Model
W8735B
Application
Terminals
Comments
Remote dial-in and
remote dial-out using a
conventional
1, 2, 3, Aux1,
Aux2, Ln1,
Ln2, Ph1,
Use with T8635L Communicating Thermostat,
W8635A or W8635B Equipment Interface
Module.
telephone line.
Ph2, Line in,
Phone out.
Use the W8703A Damper interface Module for
zoning systems.
Use the C7835A Discharge Temperature Sensor
for system diagnostics.
INSTALLATION
CAUTION
Can cause personal injury and equipment
Electrical Shock Hazard.
When installing this product…
damage.
1. Read these instructions carefully. Failure to follow
these instructions can damage the product or
cause a hazardous condition
Disconnect power before beginning installation.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for
your application.
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.
3. Installer must be a trained, experienced service
technician.
4. After completing installation, use these instructions
to check out the product operation.
® U.S. Registered Trademark
Copyright © 2000 Honeywell •
•All Rights Reserved
69- 1352
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TELEPHONE ACCESS MODULE
MODULE
WIRING
KNOCKOUT
SUBBASE
WALL
ANCHORS
(2)
WIRING LABEL
ON INSIDE
MOUNTING
OF MODULE
HOLE FOR
SUBBASE
MOUNTING
SCREWS (2)
con.
A
1
2
3
WIRING
HOLE
Aux1
Aux2
WIRING
TERMINAL
BLOCK
con.
con.
con.
B
C
D
WALL
WIRING
TERMINAL
BLOCK
WIRING
HOLE
MOUNTING
HOLE FOR
SUBBASE
Ph1
Ph2
Ln1
Ln2
M14779
WIRING
KNOCKOUT
Fig. 4. Mounting W8735B subbase.
M14778
WIRING
Fig. 5. Locating the wiring label inside the module.
TERMINAL BLOCK
WIRE
CAUTION
Can cause personal injury and equipment
Electrical Shock Hazard.
damage.
Disconnect power before beginning installation.
1. Locate the wiring label inside the telephone access
module. See Fig. 5.
2. Loosen the terminal screws on the W8735B and
connect the system wires. See Fig. 6 through 9
and Table 2.
SCREW
DRIVER
M14803
3. Securely tighten each terminal screw.
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 optional
normally open sensor contact, not included; see Fig. 7.
3
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TELEPHONE ACCESS MODULE
2. Wire the house telephones to the Phone out con-
nections (see Table 2) on the Telephone Access
Module.
Wiring the Telephone
3. After the Telephone Access Module installation is
complete, be sure to verify that the emergency
telephone line disconnect is operating correctly.
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
Telephone Access Module drops control of the
line, the Telephone Access Module is installed
correctly.
CAUTION
Incorrect Telephone Line Hookup Hazard.
Inability to call out can result in personal
injury or property damage.
Improper installation can result in blocked
phone lines and inability to make 911 and
other emergency-reporting 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.
c. If you do not get a dial tone on the house tele-
phone, follow the wiring diagrams and rewire
the telephone connections. See Fig. 8 and 9.
IMPORTANT:
Do not leave the installation until the emergency
telephone line disconnect is operating correctly.
1. Wire the telephone line from the telephone com-
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 sys-
tem) ensures that when any house telephone is
used (such as for an emergency), the Tele-
phone 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).
To EnviraCom network terminal 3 (24 Vac).
Auxiliary Input – Connect to N.O. sensor contact.
Auxiliary Input – Connect to N.O. sensor contact.
RJ11 connector – Connect to telephone line.
3
Aux1
Aux2
a
Line in
b
RJ11 connector – Connect to home telephones
Phone out
Ln1
Ln2
Ph1
Ph2
Line in - Connect to telephone line.
Line in - Connect to telephone line.
Phone out - Connect to home telephones.
Phone out - Connect to home telephones.
a
b
Connect to either Line in or use terminals Ln1 and Ln2.
Connect to either Phone out or use terminals Ph1 and Ph2.
Wiring Diagrams
See Fig. 7 through 9 for wiring diagrams.
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TELEPHONE ACCESS MODULE
SUBBASE
T8635L
C7089B
1
2
OUTDOOR
TEMPERATURE
SENSOR
OT
1
2
3
OT
3
Aux1
Aux2
NOT
USED
W8635A
FAN
RELAY
N.O.
CONTACT
(OPTIONAL)
1
2
3
HEAT 1
RELAY
G
L2
HEAT 2
RELAY
C
R
W1
W2
Y1
Y2
COOL 1
RELAY
L1
(HOT)
R
H
R
C
SYSTEM
TRANSFORMER
COOL 2
RELAY
FACTORY
INSTALLER
JUMPERS
NOT
USED
Ph1
Ph2
Ln1
Ln2
M14774
Fig. 7. Wiring the communications bus and auxiliary input.
MODULE
SUBBASE
TO
TELEPHONE
LINE
TO HOUSE
TELEPHONES
LINE
IN
1
RJ11
OPTIONAL
TELEPHONE
CONNECTIONS
RJ11
PHONE
OUT
TO HOUSE
NOT
TELEPHONES
USED
1
Ph1
Ph2
Ln1
Ln2
TO
TELEPHONE
LINE
1
USE EITHER RJ11 TELEPHONE CONNECTORS OR
OPTIONAL TELEPHONE CONNECTIONS.
M14804
Fig. 8. Telephone installation wiring.
5
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TELEPHONE ACCESS MODULE
4. Connect and insert 9 Vdc alkaline battery.
MODULE
SUBBASE
NOTE: 9 Vdc alkaline battery is optional; however,
when the battery is installed in the W8735B, the
power outage alert option is available.
5. Replace the cover. See Fig. 11.
6. Insert the module cover latch pin; see Fig 12.
7. Apply power to the system.
IMPORTANT
The Telephone Access Module does not answer
within the first 90 seconds after applying power
or anytime power is disconnected.
8. Do not attempt to dial in to the Telephone Access
Module for the first 90 seconds after applying
power to allow the Telephone Access Module time
to generate its user menu.
LINE
IN
1
SUBBASE
TO HOUSE
TELEPHONES
PHONE
OUT
MODULE
NOT
1
USED
Ph 1
Ph 2
Ln 1
Ln 2
2-3/4 IN. (70)
SCREW (2)
TO
SECURITY
SYSTEM
TELEPHONE
OUT
SECURITY SYSTEM
PANEL
BATTERY
CONNECTOR
TO TELEPHONE LINE
BATTERY
1
USE EITHER RJ11 TELEPHONE CONNECTORS OR OPTIONAL
TELEPHONE CONNECTIONS.
M14805
Fig. 9. Telephone installation wiring including
monitored security system.
Installing W8735B Module Housing Onto
Subbase
M14769
After subbase is mounted and wiring complete, install the
module housing onto the subbase:
1. Align the subbase and the module housing and
press together; see Fig. 10.
2. Insert the 2 ¾ in. screws (provided) into the holes.
3. Tighten screws; be careful not to over tighten.
Fig. 10. Installing module onto subbase.
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TELEPHONE ACCESS MODULE
COMMUNICATION LED
PASS CODE
RESET BUTTON
STATUS LEDs
SWING UP
TO LATCH
BATTERY
COVER
HOOK IN BOTTOM
M14770
Fig. 11. Replacing module cover.
7
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TELEPHONE ACCESS MODULE
To enter the configuration menu, see Table 3, call into the
Telephone Access Module using an outside line (typically
an installer would use a cellular telephone):
1. Enter the default four-digit pass code of 1 2 3 4 fol-
lowed by the # key on the telephone.
2. Enter 99 to access the configuration menu.
NOTE: Set up the Telephone Access Module ID num-
ber, pass code, zone ID names and other set-
tings as described in steps 3 and 4. Use Table 4
when setting up Configuration No. 6 in the Con-
figuration Menu (choosing Zone ID names) in
Table 3.
battery
auxiliary input
on line
momentary flash - ok
steady flash - replace
on continuously - replace
3. Enter the configuration number, see Table 3, fol-
lowed by the # key.
4. To return to the configuration menu press the * key;
to exit the configuration menu, press the * key
again.
Checkout
Telephone
Access
Module
1. Call into the Telephone Access Module using any
outside line (typically an installer would use a cellu-
lar telephone).
2. Enter the pass code.
3. Use the Telephone Access Module User Menu to:
a. Change the system mode.
b. Raise and lower the temperature.
c. Verify that the changes are made at the ther-
mostat.
d. If zoning is installed, repeat steps a. through c.
for each zone.
continuously - replace
W
8735B
M14771
Fig. 12. Inserting module cover latch pin.
IMPORTANT
Be sure to explain the dialout alert messages
and possible causes (Table 5) to the home-
owner.
Installer Setup
IMPORTANT
Discuss with the homeowner if you, the HVAC
e. Review the Owner’s Guide with the home-
contractor, are providing a monitoring service.
When you have agreed, install telephone num-
ber setting three according to Configuration No.
9 setting in Table 3.
owner and leave all the literature with them.
Table 3. Configuration Menu.
Description
Identification (ID) Number.
Configuration No.
Settings
1
Any combination of digits up to 25 digits in
When the W8735B dials out, it uses this number to length. This number is typically set to the
identify who is calling. (This number can be used telephone number where the W8735B is
to reference a data base of customers when
installed, such as the homeowner’s home
setting up a monitoring application.) The ID must telephone number.
be programmed for the dial-out function.
°
°
°
2
3
4
Low Limit Setting.
40 F(4°C) to 65 F (18°C) in 1 F (1°C)
When the temperature at the thermostat is less
than this setting, the W8735B initiates a dial-out
call. If more than one thermostat is used in a
system, it uses the lowest value.
increments. The factory default setting is
°
50 F (10°C).
°
°
°
High Limit Setting.
70 F (21° C) to 110 F(43°C) in 1 F (1°C)
When the temperature at the thermostat is greater
than this setting, the W8735B initiates a dial-out
call. When more than one thermostat is used in a
system, it uses the highest value.
increments. Factory default setting is 100
°
F (38°C).
Ring Setting.
This setting determines how many rings occur
before the W8735B picks up the line.
1, 2, 3, 4, 5, 6, 7, 8, 9, 10. (Factory default
is two rings.)
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TELEPHONE ACCESS MODULE
Table 3. Configuration Menu. (Continued)
Description
Configuration No.
Settings
5
Pass Code.
Any combination of four digits.
(Default pass code is 1234.)
This setting provides secure access for the
homeowner’s comfort settings. (Installer: Have the
homeowner enter this setting either at the time of
installation or at their convenience.)
6
7
8
9
Zone ID Names (if zoning installed).
When more than one thermostat is installed in a
system, a name can be assigned to each zone
thermostat.
Choose from a list of 26 zone names. (See
Table 4.)
Filter Change Setting (enable/disable).
The W8735B can initiate a dial-out alert when the
HVAC equipment filter needs replacing. (If not
desired, set the value to disable.)
Enable or disable. (Enable is the default.)
Enable or disable. (Enable is the default.)
Up to three telephone numbers can be
Dial-out Alert Setting (enable/disable).
The W8735B can dial out on an alert condition.
See Table 5. (If not desired, set the value to
disable.)
Dial-out Telephone Number Settings.
W8735B can store up to three telephone numbers programmed. (Each telephone number
a
can be any combination of 25 digits.)
to dial out :
•
Telephone number setting one: The
homeowner selects a number where they can
be contacted when away from home (such as
office, second home, or cellular phone
number).
Telephone number setting two: An alternate
contact when the homeowner cannot be
reached (such as relative, friend or neighbor).
Telephone number setting three (HVAC
contractor is providing monitoring service at
homeowner’s request): The HVAC contractor
phone number.
•
•
IMPORTANT
If these numbers are not programmed, a
dial-out is not initiated on alert. Tele-
phone setting numbers one and two are
for the homeowner.
10
11
Power Outage Setting,
1, 2, 3 or 4 hours. (Factory default is 1
hour.)
The W8735B can monitor if the power is
interrupted (when a 9 Vdc alkaline battery is
installed). When power is interrupted continuously
for longer or equal to the power outage setting, the
W8735B initiates a dial-out alert.
Software Version Number.
Identifies version of software in Telephone Access
Module.
None
a
The W8735B prompts for setting the dial-out telephone number type as data or voice; choose voice because data is
reserved for future applications.
9
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TELEPHONE ACCESS MODULE
Receiving and Acknowledging an Alert
Message
Table 4. Zone IDs.
Zone ID
The W8735B dials out until someone answering the
telephone (at the dial-out telephone number setting
locations described in Configuration No. 9 in Table 3)
acknowledges the alert message.
No.
Zone Name
1
Basement
Bathroom
Bedroom
Den
The message is acknowledged by pressing 1 on the
telephone keypad. If there is no acknowledgement, the
W8735B continues to dial the first two telephone
numbers in sequence every 30 minutes until an
acknowledgement is received.
2
3
4
The third telephone number setting is designed to enable
the HVAC contractor to provide a monitoring service at
the homeowner’s request. If a telephone number was
programmed into the third telephone location, the
W8735B also dials the third number and continues until
the HVAC contractor acknowledges the alert.
5
Dining Room
Foyer
6
7
Game Room
Great Room
Guest Room
Gym
8
NOTE: The W8735B considers telephone number set-
tings one and two independently from telephone
number setting three. Even when the recipient
at telephone number setting one or two
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
acknowledges the alert, it dials out and attempts
to receive an acknowledgement from the recipi-
ent at telephone number three, and vice-versa.
Kid’s Bedroom
Kitchen
When the homeowner dials in and is informed that an
alert is active, the alert can be acknowledged
immediately to stop the calls to telephone numbers
settings one and two but not to telephone number setting
three.
Library
Lower Level
Master Bedroom
Media Room
Nursery
IMPORTANT
Only the HVAC contractor can acknowledge the
alert dialed to telephone number setting three.
The HVAC contractor dials in to cancel the active alert
messages to telephone number setting three by:
Calling the home,
Office
•
•
Pool Room
Porch
Entering the last five digits of the telephone number
setting three as the pass code; for example, if the
telephone number is 555-1234, entering 5 1 2 3 4 as
the pass code, and
Following the menu to clear the alerts. (Using this
pass code allows only the HVAC dealer to cancel the
dial-out alert messages to telephone number setting
three.)
Spa
•
Sunroom
Theater
Upper Level
Wine Cellar
Workshop
Sending an Alert Message
The W8735B can initiate a dial-out sequence from the
conditions in Table 5.
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TELEPHONE ACCESS MODULE
Table 5. Dial-out Sequence Conditions.
Possible Causes
Alert Messages
High Temperature
The room temperature exceeded the high limit temperature setting
programmed in the W8735B.
Low Temperature
The room temperature exceeded the low limit temperature setting programmed
in the W8735B.
a
A heat pump compressor fault occurred.
Heat Pump
b
The system heat output is below the acceptable performance; possible heating
system failure.
Heating System
b
The system cool output is below the acceptable performance; possible cooling
system failure.
Cooling System
c
The auxiliary sensor connected to the auxiliary input terminals has tripped.
Auxiliary Input
Filter Change
Power Outage
The thermostat is indicating a filter change is required for the heating/cooling
system.
A power outage exceeded the maximum allowable time.
a
b
c
When a W8635B Equipment Interface Module is installed and L terminal is correctly used.
W7835A Discharge Temperature Sensor is required.
Normally open (N.O.) sensor contact is required. Keep the wire length between sensor and W8735B as short as possi-
ble and ensure wire is not subjected to any electrical interference.
TROUBLESHOOTING GUIDE
*
Symptom
Possible Cause
Battery is either dead or not installed.
Battery is weak.
Solution
Install or replace battery.
Replace battery.
Battery indicator is on continuously.
Battery indicator is flashing with a
steady on-off pulse.
Battery indicator appears to flash
momentarily every ten seconds.
Battery is good.
No action required.
Telephone Access Module does not
answer.
•
Power is not connected or 90-second
delay is in effect.
•
Wait 90 seconds and try
again.
•
•
Phone line is not connected.
Telephone line is out of order.
•
•
Connect telephone line.
Contact telephone company.
On line indicator is illuminated.
Telephone module is in dial-in or dial--out Wait for the call to end.
sequence.
Auxiliary input indicator is illuminated.
W8735B detected a contact closure on
auxiliary input terminals.
Determine cause of contact
closure. Remedy problem
according to contact
manufacturer instructions.
W8735B indicates, “The system is not W8735B is not receiving information from Make sure all connections
responding.”
the thermostats.
between communicating
devices are good.
Password cannot access the Telephone Incorrect pass code entered.
Access Module.
Press and hold the pass code
reset switch for five seconds.
The pass code is reset to 1-2-3-
4. Retry with the default pass
code. See Fig. 11.
11
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TELEPHONE ACCESS MODULE
Home and Building Control Home and Building Control
Honeywell
Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North
Golden Valley, MN 55422
35 Dynamic Drive
Scarborough, Ontario
M1V 4Z9
Printed in U.S.A. on recycled
paper containing at least 10%
post-consumer paper fibers.
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