Toshiba TCB-IFTH1GUL User manual

Installation Manual
24V Thermostat Interface
Model name:
TCB-IFTH1GUL
English
•Read this manual before using the TCB- IFTH1GUL
24V Thermostat Interface.
•Refer to installation manuals supplied with Indoor Unit,
Remote Controller, and Thermostat for any installation
instructions.
FOR INSTALLER

24V Thermostat Interface
Installation Manual
2-EN
Contents
Precautions for safety.....................................................................................................................3
Introduction......................................................................................................................................5
1Installation.....................................................................................................................................6
2Settings........................................................................................................................................10
3Usage...........................................................................................................................................13

24V Thermostat Interface
Installation Manual
3-EN
Precautions for safety
•Carefully read these "Precautions for Safety" before installation, and perform installation work safely.
•These precautions contain important information regarding safety.
•After installation work, carry out an operation trial to confirm that there are no problems, and explain to the customer how to operate
and maintain the system. Ask the customer to keep this Installation Manual.
Expressions
Warning
Texts whichset off inthis manner indicate thatfailure to adhere to the directions inthewarning
could result in serious bodily harm (*1) or loss of life if the product is handled improperly.
Caution
Texts whichset off in this manner indicate that failure to adhere to the directions in the caution
could result in serious bodily injury (*2) or damage (*3) to properties if the product is handled
improperly.
*1: Serious bodily harm indicates loss of eyesight, injury, burns, electric shock, bone fracture, poisoning, and other injuries which leave
after effect and require hospitalization or long-term treatment as an outpatient.
*2: Bodily injury indicates injury, burns, electric shock, and other injuries which do not require hospitalization or long-term treatment as an
outpatient.
*3: Damage to property indicates damage extending to buildings, household effects, domestic livestock, and pets.
Graphic symbols
Prohibited
" " indicates prohibiteditems.
The actual contents of the prohibition are indicated by a picture or text placed inside or next to this
graphic symbol.
Compulsory
" " indicates compulsory (mandatory) items.
The actual contents of the obligation are indicated by a picture or text placed inside or next to this
graphic symbol.
Warning
•Installation and reinstallation should be performed by your dealer or a qualified
electrician.
Attempting to carry out installation work on your own, and doing so incorrectly, may result in electric
shock or fire.
•Electrical work must be performed by a qualified electrician in accordance with this
Installation Manual. Thework must satisfyall local, national and international
regulations.
Inappropriate work may result in electric shock or fire.
•Be sure to turn off the power before startingwork.
Failure to do so may result in electric shock.
•Use predefined wire and connect them with certainty. Keep the connecting terminal free
from external force.
Improper wire connection or clamping may result in exothermic, fire or malfunction.
•Do not modify the unit.
Doing so may result in excessive heat or fire.
•There is a 18V DC circuit separate from a 24V AC circuit on the interface. Do not
interconnect the outputs of different class 2 circuits.
The following instructions
must be observed.

24V Thermostat Interface
Installation Manual
4-EN
Caution
•A double-insulated, separately-shielded, copper conductor with a minimum 600 volt rating
must be used between the 24V Thermostat Interface, the Indoor Unit and wired controllers.
•Use copper conductors only.
•When installing the device in a hospital, communication facility, etc., provide
sufficient electrical isolation against electromagnetic interference.
Power generators, power inverters, high-frequency medical equipment, or radio communication
equipment may interfere with the normal operation of this device. Contrarily, the device may also affect
medical treatment, image broadcasting, etc., by radiating electromagnetic noise.
•Electrical wires must be run without tension.
•Do not install the device in a location where leakage of flammable gas may occur.
The leaked gas may accumulate around the device and ignite.
•Do not install the device in environments where large amounts of oil (including
machine), sulfidizing gas, acidic chemical spray, or alkaline chemical spray is present.
These types of substances may damage internal parts and degrade performances of the device. Such
condition of the device may cause electric shock.
•Do not install the device in a high humidity environment where steam could reach the
device.
Even though this product is designed to withstand condensation in up to 90% RH environments, long
term exposure to condensation may cause a chance for electric shock and/or device malfunction.
•Avoid direct contact to the main circuit board; also, make sure that dust does not
accumulate on the main circuit board.
•Do not install this device in a location where direct sunlight can reach or where the
temperature may become higher than 40°C (104°F) or lower than 0°C (32°F).
If the device is installed in such a location, it may result in malfunctions.
•Do not submerge this device under water.
Doing so may lead to electric shock or may cause malfunctions.

24V Thermostat Interface
Installation Manual
5-EN
Introduction
 Overview
The 24V Thermostat Interface is an electronic, incorporated control, which allows VRF (Variable Refrigerant Flow) and Light
Commercial TOSHIBA Carrier indoor units to utilize 3rd party 24VAC thermostat sold in the US market.
 Included Items
Component
Q'ty
Remarks
24V Thermostat Interface
1
Wood Screws
2
Kit Mounting Screws #6/ 18X1’’
Wall Anchors
2
Installation Manual
1
 Specifications
Power supply
DC18V (+0%, -20%) (provided by an indoor unit), AC24V (±10%)
(24V Thermostat Interface circuit; provided by field procured transformer)
Input power
0.5W
Operating current
40mA (DC18V)
Operating temperature range
32 to 104 °F (0°C to 40°C), 10% to 90% RH (no condensation)
Storage temperature range
-4 to 140 °F (−20°C to +60°C), 10% to 90% RH (no condensation)
Dimensions
5.1" (W) x 1.1" (H) x 2.8" (D) inch (130 (W) x 28 (H) x 72 (D) mm)
Weight
0.25lb (0.113kg)
 External View (24V Thermostat Interface equipment)
Unit: inch (mm)
)

24V Thermostat Interface
Thermostat Interface
Installation Manual
6-EN
1Installation
 24V Thermostat Interface Installation and Orientation
Install the 24V Thermostat Interface on a flat surface using provided Wood Screws. Make sure that the installation result
complies with the local electrical code. The 24V Thermostat Interface is intended for indoor use only.
(1) Wall mount
Use the Wood Screws to attach the 24V Thermostat Interface. Do not install the 24V Thermostat Interface in a longitudinal
direction.
(2) Surface mount
Use the Wood Screws to attach the 24V Thermostat Interface.
Note: Make sure to comply with local codes and regulations.
Upper direction
Upper direction

24V Thermostat Interface
Installation Manual
7-EN
 System Configuration
Warning: Thermostat should be configured for conventional single or two stage systems
(Refer to Installation Steps and Wiring Example sections below).
Refer to the installation manuals supplied with the Indoor Unit, the Remote Controller, and the Thermostat
for any installation instructions.
1. All wiring should be Class 2.
2. All wiring shown below should be performed with AWG18 thermostat wire except between the Indoor Unit and the Remote Controller.
3. All wires to be used must satisfy all local and national regulations (Field procured).
4. The wiring between the Indoor Unit, the Remote Controller (optional), and the 24V Thermostat Interface should be performed with
AWG20 to AWG14 X 2. Limit the total length of the remote control wiring (L + L1) up to 980 ft (300 m).
5. W2 and Y2 signals are optional, and may be omitted when a single-stage thermostat is used.
Note: High/medium/low fan signals are optional, and may not be available on all thermostat models.
6. The Remote Controller is required during the start-up for address setting and diagnostics in case Error codes are shown.
Set the Remote Controller as “Follower remote control”. Refer to the Installation Manual of the Remote Controller for
instructions on configurations of the controller status.
Basic wiring diagram: Single-stage Cooling and Heating
 Terminal definition of 24V Thermostat Interface
Terminal definition
Remote Controller (Optional)
A
B
Installation use only
Set the Remote Controller
as “Follower remote control”.
Transformer
24VAC
Indoor Unit
A
B
Transformer:
Field procured
Thermostat
72
24VAC
Fan
Terminal
Function
A
(No polarity)
To Remote
Controller
B
(No polarity)
To Remote
Controller
Terminal
Function
G
Fan
W2
Stage 2 Heating
W1
Stage 1 Heating
Y2
Stage 2 Cooling
Y1
Stage 1 Cooling
G3
High Fan
G2
Medium Fan
G1
Low Fan
R
24VAC (Out)
TR
24VAC (In)
C
Common (Out)
TC
Common (In)
L
L1
24V Thermostat
Interface
TCB-IFTH1GUL
For use only on
24 volt circuits

24V Thermostat Interface
Thermostat Interface
Installation Manual
8-EN
 Transformer
Warning: The 24V Thermostat Interface consumes electrical power of 0.5 W and requires 24V(±10%)AC power supply.
Select a reinforced-insulation transformer with proper capacity considering consumption of other
connected devices. Improper selection may cause electric shock or fire.
 Installation Steps
1. Wiring between the Indoor Unit, the Remote Controller, and the 24V Thermostat Interface
1) Refer to installation manuals supplied with the Indoor Unit and the Remote Controller, and this manual for wiring instructions.
2) Terminals A and B are interchangeable, i.e., there is no polarity between them.
Warning: Do not connect high voltage power wire to the Terminals A and B.
Do not use a crimp-style connector for the Terminals A and B.
3) Use AWG20 to AWG14 X 2 wire compliant with local, and national regulations (Field procured).
4) Set the Remote Controller as “Follower remote control”. Refer to the Installation Manual of the Remote Controller for
instructions on configurations of the controller status.
Caution: 24V Thermostat Interface does not allow dual remote control systems.
2. Wiring between the 24V Thermostat Interface, the Thermostat, and the Transformer
1) Refer to installation manuals of the Thermostat and the Transformer, and this manual for wiring instructions.
2) Use AWG18 wire compliant with local, and national regulations (Field procured).
Warning: Do not connect high voltage power wire to the Terminals G, W2, W1, Y2, Y1, G3, G2, G1, R, TR, C, and TC.
These Terminals are used for 24VAC circuit.
3. Set DIP switches SW01 and SW02 on the main circuit board according to Section “2 Settings” in this manual.
4. Turn the power to the Transformer on and confirm the Thermostat and the 24V Thermostat Interface are powered properly followed by
forcing the Thermostat to supply output to the Y1/Y2, W1/W2, and G terminals.

24V Thermostat Interface
Installation Manual
9-EN
 Wiring Example
Two-stage Cooling and Heating
Single-stage Cooling and Heating with dedicated three Fan-Speed
Remote Controller (Optional)
A
B
Transformer
24VAC
Indoor Unit
A
B
Transformer:
Field procured
Thermostat
72
24VAC
Fan
Remote Controller (Optional)
A
B
Transformer
24VAC
Indoor Unit
A
B
Transformer:
Field procured
Thermostat
72
24VAC
Fan
24V Thermostat
Interface
TCB-IFTH1GUL
24V Thermostat
Interface
TCB-IFTH1GUL
Installation use only
Set the Remote Controller
as “Follower remote control”.
Installation use only
Set the Remote Controller
as “Follower remote control”.
For use only on
24 volt circuits
For use only on
24 volt circuits

24V Thermostat Interface
Thermostat Interface
Installation Manual
10-EN
Single-stage Cooling and Two-stage Heating
2Settings
1. Disconnect any power source before servicing or changing the DIP switches.
2. Remove four screws on the front of the case.
3. Configure SW01 and SW02 based on the following adjustable items. See the diagram below for locations of SW01 and SW02.
4. Replace the four screws removed in step 2 to the original positions.
 Fan speed (Fan mode) settings
SW01-1, SW01-2: The Indoor Unit’s fan speed during Fan mode operation can be set according to the following table.
If G1/G2/G3 input is used, the fan speed will be determined by G1/G2/G3 signal from the Thermostat.
SW01-1
SW01-2
Operation
OFF
OFF
Medium fan speed (Default)
OFF
ON
Low fan speed
ON
OFF
High fan speed
ON
ON
Do not use, reserved
SW02 (8 bits)
SW01 (8 bits)
A
B
Transformer
24VAC
Indoor Unit
A
B
Transformer:
Field procured
Thermostat
72
24VAC
Fan
Remote Controller (Optional)
24V Thermostat
Interface
TCB-IFTH1GUL
Installation use only
Set the Remote Controller
as “Follower remote control”.
For use only on
24 volt circuits

24V Thermostat Interface
Installation Manual
11-EN
 Fan speed (Cooling, Heating) settings
SW01-3, SW01-4: The Indoor Unit’s fan speed during Cooling or Heating mode operation can be set according to the following table.
If G1/G2/G3 input is used, the fan speed will be determined by G1/G2/G3 signal from the Thermostat.
 Wind direction (Cooling) settings
SW01-5, SW01-6: The Indoor Unit’s wind direction during Cooling mode operation can be set according to the following table.
 Wind direction (Heating) settings
SW01-7, SW01-8: The Indoor Unit’s wind direction during Heating mode operation can be set according to the following table.
 Temperature control settings (Variable/Fixed)
SW02-1: The 24V Thermostat Interface controls the Indoor Unit by the dry-contact signals from the Thermostat and the room
temperature sensed by the Indoor Unit. There are two control modes configurable by the 24V Thermostat Interface.
Auto (default) mode provides more comfortable operation by varying the compressor speed. On the other hand,
Fixed capacity mode provides On/Off controls instead of varying the compressor speed.
SW01-3
SW01-4
Operation
OFF
OFF
Auto (Default)
OFF
ON
Low fan speed
ON
OFF
Medium fan speed
ON
ON
High fan speed
SW01-5
SW01-6
Operation
OFF
OFF
Determined by Remote Controller setting.
(Default)
OFF
ON
F3 (Refer to Owner’s Manual of RC)
ON
OFF
F2 (Refer to Owner’s Manual of RC)
ON
ON
F1 (Refer to Owner’s Manual of RC)
SW01-7
SW01-8
Operation
OFF
OFF
Determined by Remote Controller setting.
(Default)
OFF
ON
F5 (Refer to Owner’s Manual of RC)
ON
OFF
F4 (Refer to Owner’s Manual of RC)
ON
ON
F2 (Refer to Owner’s Manual of RC)
SW02-1
Operation
OFF
Auto (Default), Variable capacity mode
ON
Fixed capacity mode
F1
F2
F3
Wind direction Image (Refer to Owner’s Manual of Remote Controller)
F4
F5
Wind direction Image (Refer to Owner’s Manual of Remote Controller)
F2

24V Thermostat Interface
Thermostat Interface
Installation Manual
12-EN
 Fixed capacity mode settings
SW02-2,
SW02-3, SW02-4: When the system is configured in Fixed capacity mode (SW02-1: ON), the 24V Thermostat Interface provides
capacity according to the following table depending on the signals (Y1/Y2, W1/W2) from the Thermostat.
1. Cooling operation
Note: In case only Y1 signal is used, set SW02-3 at ON position.
2. Heating operation
Note: In case only W1 signal is used, set SW02-4 at ON position.
 Minimum Run Timer
SW02-6: The Minimum Run Timer protects the system reliability by maintaining the minimum duration of the system operation
based on the following table. The Minimum Run Timer sustains the system operation even if the Thermostat turns off
prior to an expiry of the Minimum Run Timer.
Note: SW02-5, SW02-7, and SW02-8 are reserved. Do not change them from OFF position.
SW02-3
SW02-2
Operation (Capacity)
OFF
OFF
Y1: 75%, Y2: 100% (Default)
OFF
ON
Y1: 50%, Y2: 100%
ON
OFF
Y1: 100%, Y2: 100%
ON
ON
SW02-4
SW02-2
Operation (Capacity)
OFF
OFF
W1: 75%, W2: 100% (Default)
OFF
ON
W1: 50%, W2: 100%
ON
OFF
W1: 100%, W2: 100%
ON
ON
SW02-6
Operation
OFF
5 minutes (Default)
ON
10 minutes

24V Thermostat Interface
Installation Manual
13-EN
3Usage
Operate the Thermostat by consulting its user manuals. For proper operation and configuration settings of the Thermostat,
consult its user manual.
Cautions:
1. 24V Thermostat Interface is not compatible with dual remote control systems.
2. The Remote Controller (Wired / Wireless) is not needed during normal operation. Therefore, place the Remote Controller
(Wired / Wireless) in a location out of reach of users. The Remote Controller (Wired / Wireless) will be used ONLY during
installation of the 24V Thermostat Interface.
3. Indoor Unit may restrict the temperature setting based on its specifications. Indoor Unit may suspend its operation to protect
the system based on its specifications.
4. The Indoor Unit operates in Fan Mode when only G signal is received from the Thermostat.
5. 24V Thermostat Interface is not compatible with additional control systems such as Web Browser Control, Central Remote Control,
BACnet® System, LonWorks® , Touch Screen Controller, etc.
 LED indicators
1. LEDs (D501-D508) will flash during initial communication between the Indoor Unit and the 24V Thermostat Interface.
2. Meaning of LED indication during normal operation is given in the following table.
*1: Communication error between 24V Thermostat Interface and Indoor Unit.
Duplicated Header remote controller or Follower remote controller.
*2: Error detected by Indoor Unit.
LEDs
Color
Remarks
D501
Green
Y1/Y2 input present
D502
Red
W1/W2 input present
D503
Yellow
G input present
D504
Yellow
G1 input present
D505
Yellow
G2 input present
D506
Yellow
G3 input present
D507
Yellow
Communication Error (flashing) *1
D508
Red
Power on / Indoor Unit Error
(flashing) *2
LEDs: D501 –D508

24V Thermostat Interface
Thermostat Interface
Installation Manual
14-EN
MEMO

24V Thermostat Interface
Installation Manual
15-EN
MEMO

24V Thermostat Interface
Thermostat Interface
Installation Manual
16-EN
1025 Cobb Place Blvd, Kennesaw, GA30144 United States
[phone]
Toshiba Carrier North America, Inc
170002R02-UL