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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT
Cable Termination
The FTT network segment requires termination for proper data transmission performance. Use a 209541B Termination
Module to connect two of the three termination module wires to the L
ON
W
ORKS®
Bus terminals. Refer to L
ON
W
ORKS®
Bus
Wiring Guidelines form 74-2865 for details.
Singly Terminated Network Segment
In a singly terminated topology segment, only one termination is required and can be placed anywhere on the segment.
Singly terminated segments use the yellow and brown wires.
If the network topology requires a singly terminated termination module at a T7350H, connect the singly terminated module wiring on the appropriate terminals as
.
SUBBASE
T5 T6 T7 T4 T3 OS OS AS AS AUX W3/Y4 Y3 W2 Y2
EB EB HS HC HP M M X RH RC AUX W1 Y1 G
BROWN YELLOW
PART NO. 209541B
TERMINATION MODULE
ORANGE M22494
Fig. 6. Singly terminated LonWorks® bus termination module.
Doubly Terminated Daisy-Chain Network Segment
In a doubly terminated daisy-chained topology segment, two terminations are required, one at each end of the topology segment. Doubly terminated segments use the orange and brown wires. If the network topology requires a doubly terminated module at a T7350H (T7350H is the first or last device on the network cable) connect the termination module
wiring on the appropriate terminals as shown in Fig. 7. For
additional wiring information, refer to the E-Bus Wiring
Guidelines, form 74-2865, and the Excel 10 FTT Termination
Module Installation Instructions, form 95-7554.
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment circuitry.
Disconnect power supply before installation.
IMPORTANT
All wiring must agree with applicable codes, ordinances and regulations.
1. Loosen subbase terminal screws and connect system wires.
NOTE: Maximum (and recommended) wire size is 18gauge. Do not use wire smaller than 22-gauge. Follow equipment manufacturer wiring instructions when available. Refer to the Wiring Diagram section for typical hookups. A letter code is located near each terminal for identification. Refer to the Specifications section, Tables 8 and 9 for terminal designations.
2. Securely tighten each terminal screw.
3. Push excess wire back into the hole in the wall.
4. Plug the hole with nonflammable insulation to prevent drafts from affecting the thermostat.
Wiring Details
L
ON
W
ORKS®
network cable should be wired separately from the power and I/O wires when installing T7350H models. If this is not possible, use a minimum of 4 in. (102 mm) separation between split ferrite cores (Fair-Rite 0443164151, www.fair-rite.com) to ensure compliance with Class B limits
(does not apply to Class A limits). See Fig. 8 to apply ferrite
cores to L
ON
W
ORKS®
Bus input and output.
Step 4. Prepare Wiring Diagrams
show T7350 terminal arrangements and provide detailed wiring diagrams. Reference these diagrams to prepare the site-specific job drawings.
1.
WIRES TO T7300H
COMMUNICATING SUBBASE
SUBBASE
T5 T6 T7 T4 T3 OS OS AS AS AUX W3/Y4 Y3 W2 Y2
EB EB HS HC HP M M X RH RC AUX W1 Y1 G
WIRES TO ALL
INPUTS AND
OUTPUTS
2.
BROWN ORANGE
PART NO. 209541B
TERMINATION MODULE
YELLOW M22495
Fig. 7. Doubly terminated L ON W ORKS® bus termination modules.
WIRES TO ALL
INPUTS AND
OUTPUTS
M22496
WIRES TO T7300H
COMMUNICATING SUBBASE
Fig. 8. Ferrite core wires from T7350H to L ON W ORKS® inputs and outputs.
63-4368 12
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT
T7770 REMOTE SENSOR
9 8 7 6 5 4 3 2 1
OUTDOOR
AIR
SENSOR
4
ECONOMIZER
COMPRESSOR
CONTACTOR 2
DISCHARGE
AIR
SENSOR
HEAT
RELAY 3
HEAT
RELAY 2
SUBBASE
T5 T6 T7 T4 T3 OS OS AS AS AUX W3/Y4 Y3 W2 Y2
EB EB HS HC HP M M X RH RC AUX W1 Y1 G
COMPRESSOR
CONTACTOR 3
L
ON
W
ORKS
®
BUS
L ON W ORKS
®
BUS
1 2
L2
L1
(HOT)
HUMIDITY
SENSOR
MOTION
SENSOR
3 HEAT
RELAY 1
FAN
RELAY
COMPRESSOR
CONTACTOR 1
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2
3
ENSURE TRANSFORMER IS SIZED TO HANDLE THE LOAD.
HEAT/COOL SYSTEMS WITH ONE TRANSFORMER REQUIRE THE FACTORY-INSTALLED JUMPER.
4 USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.
M22499
Fig. 9. Typical hookup of T7350H1009 in three-stage heat and three-stage cool conventional system with one transformer.
T7770 REMOTE SENSOR
9 8 7 6 5 4 3 2 1
OUTDOOR
AIR
SENSOR
COMPRESSOR
CONTACTOR 2
DISCHARGE
AIR
SENSOR
HEAT
RELAY 3
HEAT
RELAY 2
SUBBASE
T5 T6 T7 T4 T3 OS OS AS AS AUX W3/Y4 Y3 W2 Y2
EB EB HS HC HP M M X RH RC AUX W1 Y1 G
COMPRESSOR
CONTACTOR 3
L ON W ORKS
®
BUS
HUMIDITY
SENSOR
MOTION
SENSOR
3 HEAT
RELAY 1
FAN
RELAY
L ON W ORKS
®
1
BUS 4
ECONOMIZER
COMPRESSOR
CONTACTOR 1
L2
2
L1
(HOT)
L2
L1
(HOT)
AUXILIARY
TRANSFORMER
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2
3
ENSURE TRANSFORMER IS SIZED TO HANDLE THE LOAD.
HEAT/COOL SYSTEMS WITH ONE TRANSFORMER REQUIRE THE FACTORY-INSTALLED JUMPER.
4 USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.
M22497
Fig. 10. Typical hookup of T7350H1009 with auxiliary transformer.
13 63-4368
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT
T7770 REMOTE SENSOR
OUTDOOR
AIR
SENSOR
9 8 7 6 5 4 3 2 1
DISCHARGE
AIR
SENSOR
MODULATING
–
+
HEAT
(4-20 mA)
SUBBASE
T5 T6 T7 T4 T3 OS OS AS AS AX AH AC
R
X
AUX
MODULATING
– COOL
+ (4-20 mA)
R
X
EB EB HS HC HP M M X RH
2
RC AUX W1 Y1 G
L ON W ORKS
®
BUS
L ON W ORKS
®
BUS
HUMIDITY
SENSOR
MOTION
SENSOR
HEAT
RELAY 1
FAN
RELAY
3
ECONOMIZER
COMPRESSOR
CONTACTOR 1
1
L2
L1
(HOT)
HEATING
TRANSFORMER
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2
3
WHEN INSTALLED ON A SYSTEM WITH TWO TRANSFORMERS, REMOVE THE FACTORY-INSTALLED JUMPER.
USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.
COOLING
TRANSFORMER
L2
L1
(HOT)
1
M22498
Fig. 11. Typical hookup of T7350H1017 for system with two independent heat stages (one modulating), two independent cool stages (one modulating), and two transformers.
T7770 REMOTE SENSOR
9 8 7 6 5 4 3 2 1
OUTDOOR
AIR
SENSOR
DISCHARGE
AIR
SENSOR
MODULATING
–
+
HEAT
(4-20 mA)
SUBBASE
T5 T6 T7 T4 T3 OS OS AS AS MX MH MC
R
X
AUX
MODULATING
–
+
COOL
(4-20 mA)
R
X
HS HC HP M M X RH
2
RC AUX W1 Y1 G
L ON W ORKS
®
BUS
L ON W ORKS
®
BUS
HUMIDITY
SENSOR
MOTION
SENSOR
HEAT
RELAY 1
FAN
RELAY
3
ECONOMIZER
COMPRESSOR
CONTACTOR 1
1
L2
L1
(HOT)
HEATING
TRANSFORMER
L2
L1
(HOT)
AUXILIARY
TRANSFORMER
1
2
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
WHEN INSTALLED ON A SYSTEM WITH TWO TRANSFORMERS, REMOVE THE FACTORY-INSTALLED JUMPER.
USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.
COOLING
TRANSFORMER
L2
L1
(HOT)
1
M22491
Fig. 12. Typical hookup of T7350H1017 for system with two independent heat stages (one modulating), two independent cool stages (one modulating), and three transformers.
63-4368 14
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