T8624D Chronotherm® IV
Deluxe Zone
Multistage Thermostat
INSTALLATION INSTRUCTIONS
APPLICATION
The T8624D Chronotherm® IV Deluxe ZoneMultistage Thermostat provides electronic control of 24 Vac multistage zoned heating and cooling system. Refer to
Table 1 for a general description of the thermostat. The T8624 thermostat requires a common wire to supply power.
Table 1. Description of T8624 Thermostats.
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Model |
Application |
Powering Method |
Changeover |
System Selection |
Fan Selection |
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T8624D |
Zone 1 on MABS II or |
Requires common wire |
Automatic or |
Heat-Off-Cool-Auto |
On-Auto |
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TotalZone® system |
to power supply |
manual |
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RECYCLING NOTICE
If this control is replacing a control that contains mercury in a sealed tube, do not place your old control in the trash.
Contact your local waste management authority for instructions regarding recycling and the proper disposal of the old thermostat.
INSTALLATION
When Installing this Product...
1.Read these instructions carefully. Failure to follow the instructions can damage the product or cause a hazardous condition.
2.Check the ratings given in the instructions and on the product to make sure the product is suitable for your application.
3.Installer must be a trained, experienced service technician.
4.After completing installation, use these instructions to check out the product operation.
Location
Install the thermostat about 5 ft (1.5m) above the floor in an area with good air circulation at average temperature. See Fig. 1.
Do not install the thermostat where it can be affected by:
—drafts, or dead spots behind doors and in corners.
—hot or cold air from ducts.
—radiant heat from sun or appliances.
—concealed pipes and chimneys.
—unheated (uncooled) areas such as an outside wall behind the thermostat.
Wallplate Installation
The thermostat can be mounted horizontally on the wall or on a 2 in. x 4 in. wiring box. Position wallplate horizontally on the wall or on a 2 in. x 4 in. wiring box.
Position and level the wallplate (for appearance only). The thermostat will function properly even when not level.
®U.S. Registered |
Trademark |
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69-1074 |
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Copyright © 1997 |
Honeywell Inc. • |
• All Rights Reserved |
X-XX UL |
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T8624D CHRONOTHERM ® IV DELUXE ZONE MULTISTAGE THERMOSTAT
YES
NO
NO
5 FEET
[1.5 METERS]
NO
M10106
Fig. 1. Typical location of thermostat.
WALL
WIRES
THROUGH WALL
WALL ANCHORS
(2)
MOUNTING
HOLES
MOUNTING
SCREWS
M15044
Fig. 2. Mounting the wallplate.
Use a pencil to mark the mounting holes. See Fig. 2.
Remove the wallplate from the wall and drill two 3/16 inch holes in the wall (if drywall) as marked. For firmer material such as plaster, drill two
7/32 inch holes. Gently tap anchors (provided) into the drilled holes until flush with the wall.
Position the wallplate over the holes, pulling wires through the wiring opening.
Loosely insert the mounting screws into the holes.
Tighten mounting screws.
WIRING
All wiring must comply with local electrical codes and ordinances. Refer to Fig. 3 and 4 for typical hookups. A letter code is located near each terminal for identification.
CAUTION
Disconnect power before wiring to prevent electrical shock or equipment damage.
Loosen the terminal screws on the wallplate and connect the system wires. See Fig. 5.
IMPORTANT
Use 18 gauge, color-coded thermostat cable for proper wiring.
Securely tighten each terminal screw.
Push excess wire back into the hole.
Plug the hole with nonflammable insulation to prevent drafts from affecting the thermostat.
69-1074 |
2 |
T8624D CHRONOTHERM ® IV DELUXE ZONE MULTISTAGE THERMOSTAT
C7089B OUTDOOR
TEMPERATURE
SENSOR (OPTIONAL)
THERMOSTAT |
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O G B C Y1 R W1 W2 Y2 |
OT OT |
ZONE 1 |
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W2 |
TotalZone® |
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L |
PANEL |
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THERMOSTAT |
G |
CONNECTIONS |
Y |
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R |
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W |
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M6 |
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M4 |
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M1 |
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NOTE: WHEN USING W2 ON THE THERMOSTAT TO CONTROL THE SECOND STAGE OF HEATING, MAKE SURE THE STAGE
JUMPER IS IN PLACE, ON THE TZ PANEL |
M11418 |
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Fig. 3. Typical wiring diagram for T8624 on zone 1 TotalZone® control panel.
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C7089B OUTDOOR |
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TEMPERATURE |
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SENSOR (OPTIONAL) |
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THERMOSTAT |
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O G B |
C W1 R Y1 W2 Y2 OT OT |
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ZONE 1 |
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O1 |
T8 |
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G1 |
T7 |
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B1 |
T6 |
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E1 |
T5 |
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CHANGEOVER |
T4 |
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CONTROL |
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M1 |
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MABS II/L |
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PANEL |
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THERMOSTAT |
M11419 |
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CONNECTIONS |
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Fig. 4. Typical wiring diagram for T8624D on zone 1 MABS II control panel.
Mounting Thermostat
Engage tabs at the top of the thermostat and wallplate. See Fig. 6. Be sure to align the subbase pins to avoid damage to the thermostat.
Press lower edge of case to close and latch.
NOTE: To remove the thermostat from the wall, first pull out at the bottom of the thermostat; remove top last.
A.ENGAGE TABS AT TOP OF THERMOSTAT AND WALLPLATE.
B. PRESS LOWER EDGE OF CASE TO LATCH.
M15043
Fig. 6. Mounting thermostat on wallplate.
FOR WRAPAROUND INSERTION STRIP 7/16 IN. (11 MM).
FOR STRAIGHT INSERTION STRIP 5/16 IN. (8 MM).
M4826
Fig. 5. Proper wiring technique.
3 |
69-1074 |
T8624D CHRONOTHERM ® IV DELUXE ZONE MULTISTAGE THERMOSTAT
SET WAKE TIMES AND SETPOINTS
INCREASE TIME SETTING OR SCROLL FORWARD THROUGH INSTALLER SETUP AND SELF-TEST
SET CURRENT
DAY AND TIME
RETURN TO
NORMAL
OPERATIONS
ENTER
INDEFINITE
OR TIMED
HOLD MODE
Time
Run |
Set Current |
Program |
Day/Time |
Hold Temp |
Day |
SET CURRENT OR |
Daylight |
Copy |
PROGRAM DAY |
Time |
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CHANGE BETWEEN
DAYLIGHT SAVINGS
AND STANDARD TIME
COPY ONE PROGRAMMED
DAY TO ANOTHER DAY
SET LEAVE TIMES
AND SETPOINTS
SET RETURN TIMES
AND SETPOINTS
Set Program
Wake |
Leave |
Return |
Sleep |
Heat/Cool |
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System |
Fan |
Settings |
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CHANGE BETWEEN
HEATING AND COOLING
SETPOINTS
DECREASE TIME SETTING
OR SCROLL BACKWARD
THROUGH INSTALLER
SETUP AND SELF-TEST
INCREASE TEMPERATURE SETTING OR SCROLL FORWARD THROUGH INSTALLER SETUP OPTIONS
DECREASE TEMPERATURE SETTING OR SCROLL BACKWARD THROUGH INSTALLER SETUP OPTIONS
DISPLAY INFORMATION SUCH AS PRESENT SETTINGS AND OUTDOOR TEMPERATURE
SET SLEEP
TIMES AND
SETPOINTS
SELECT FAN
OPERATION
SELECT SYSTEM
OPERATION
M10405
Fig. 7. T8624D key locations and descriptions.
Using Thermostat Keys
The thermostat keys are used to:
•set current day and time,
•program times and setpoints for heating and cooling,
•temporarily override program temperatures,
•display present setting,
•configure Installer Setup,
•check Self-Test,
•display outdoor temperature (select models),
•set the system operation,
•set the fan operation.
Cool: The thermostat controls the cooling.
Auto: The thermostat automatically changes between heating and cooling operation, depending on the indoor temperature.
Fan settings control the system fan as follows: On: Fan operates continuously.
Auto: Fan operates with equipment.
See Fig. 7 for the location of the keys.
SETTINGS
System and Fan Settings
The system default setting is Heat and the fan default setting is Auto. Use the System and Fan keys to change the settings. See Fig. 8. The fan settings can be set for each program period individually. The system selection is for all the program periods.
System settings control the thermostat operation as follows:
Heat: The thermostat controls the heating. Off: Both the heating and cooling are off.
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Time |
Set Program |
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Run |
Set Current |
Wake |
Leave |
Return |
Sleep |
Program |
Day/Time |
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Hold Temp |
Day |
Heat/Cool |
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System |
Settings |
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System |
Fan |
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Daylight |
Copy |
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Time |
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Fan |
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M15042
Fig. 8. T8624D System and Fan key locations.
NOTE: Always press the keys with your fingertip or similar blunt tool. Sharp instruments like a pen or pencil point can damage the keyboard.
69-1074 |
4 |
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