Toshiba TRANQUILITY 20, TRANQUILITY 27 ClimaDry Sequence Of Operation, ClimaDry Operating Modes

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ClimaDry Sequence Of Operation

A heat pump equipped with ClimaDry can operate in three modes; cooling, cooling with reheat, and heating. The cooling/heating modes are like any other ClimateMaster WSHP. The reversing valve (“O” signal) is energized in cooling, along with the compressor contactor(s) and blower relay. In the heating mode the reversing valve is de-energized. Almost any thermostat will activate the heat pump in heating or cooling modes. The DXM microprocessor board, which is standard with the ClimaDry option, will accept either heat pump (Y,O) thermostats or non-heat pump (Y,W) thermostats (see CXM/DXM AOM for detailed DXM information).

The reheat mode requires either a separate humidistat/ dehumidistat or a thermostat that has an integrated dehumidification function for activation. The DXM board is configured to work with either a humidistat or dehumidistat input to terminal “H” (DIP switch settings for the DXM board are shown below in table 2). Upon receiving an “H” input, the DXM board will activate the cooling mode and engage reheat. Table 3 shows the relationship between thermostat input signals to the DXM board and unit operation.

There are five operational inputs for single stage units and seven operational inputs for two stage units: -Fan Only

-1st Stage Cooling

-2nd Stage Cooling

-1st Stage Heating

-2nd Stage Heating

-3rd Stage Heating (If applicable) -Reheat Mode

Fan Only: A (G) call from the thermostat to the (G) terminal of the DXM control board will bring the unit on in fan only mode.

1st Stage Cooling: A simultaneous call from (G), (Y1), and (O) to the (G), (Y1), (O/W2) terminals of the DXM control board will bring the unit on in 1st Stage Cooling.

Table 2: Humidistat/Dehumidistat Logic and DXM 2.1, 2.2., 2.3 DIP settings

Sensor

2.1

2.2

2.3

Logic

Reheat (ON) - H

Reheat (OFF) - H

 

 

 

 

 

 

 

Humidistat

OFF

OFF

OFF

Reverse

0 VAC

24 VAC

 

 

 

 

 

 

 

Dehumidistat

OFF

ON

OFF

Standard

24 VAC

0 VAC

Table 3: ClimaDry Operating Modes

 

 

 

 

Input

 

 

 

 

 

Output

 

 

Mode

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O

G

Y1

 

Y23

W

H

O

G

Y1

 

Y23

Backup

Reheat

 

 

 

 

 

 

Elec Heat

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No Demand

ON/OFF5

OFF

OFF

 

OFF

OFF

OFF

ON/OFF5

OFF

OFF

 

OFF

OFF

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fan Only

ON/OFF5

ON

OFF

 

OFF

OFF

OFF

ON/OFF5

ON

OFF

 

OFF

OFF

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cooling 1st Stage

ON

ON

ON

 

OFF

OFF

OFF

ON

ON

ON

 

OFF

OFF

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cooling 2nd Stage

ON

ON

ON

 

ON

OFF

OFF

ON

ON

ON

 

ON

OFF

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cooling & Dehumidistat1

ON

ON

ON

 

ON/OFF5

OFF

ON

ON

ON

ON

 

ON/OFF5

OFF

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dehumidistat Only

ON/OFF5

OFF

OFF

 

OFF

OFF

ON

ON

ON

ON

 

ON

OFF

ON

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Heating 1st Stage

OFF

ON

ON

 

OFF

OFF

OFF

OFF

ON

ON

 

OFF

OFF

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Heating 2nd Stage

OFF

ON

ON

 

ON

ON/OFF5

OFF

OFF

ON

ON

 

ON

ON/OFF5

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Heating 3rd Stage4

OFF

ON

ON

 

ON

ON4

OFF

OFF

ON

ON

 

ON

ON4

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Heating & Dehumidistat2

OFF

ON

ON

 

ON/OFF5

ON/OFF5

ON

OFF

ON

ON

 

ON/OFF5

ON/OFF5

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1Cooling input takes priority over dehumidify input.

2DXM is programmed to ignore the H demand when the unit is in heating mode.

3N/A for single stage units; Full load operation for dual capacity units.

4Single stage unit: W = 2nd Stage backup elec. heat; Two-Stage units: W = 3rd stage backup elec. heat. 5ON/OFF = Either ON or OFF.

ClimaDry Whole House Dehumidification - ClimateMaster Geothermal Heat Pumps - Rev.: 18 April, 2008B

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Contents ClimaDry Series Standard ClimaDry Benefits Features IncludeAvailability ClimaDry ApplicationsTypical Unit Latent capacity Example Size 036 PerformanceClimaDry Operating Modes ClimaDry Sequence Of OperationClimaDry Application Considerations ClimaDry Component FunctionsClimaDry Schematic CFM Tranquility 27 Blower Performance DataTranquility 20 ECM Blower Performance Data Model Fan Rated Min TS Air Coil Face Area ClimaDry Reheat Coil Pressure Drop TS Units PSC MotorExample Page Flushing/Purging Units with ClimaDry 97B0051N01

TRANQUILITY 20, TRANQUILITY 27 specifications

Toshiba has made significant strides in the realm of home appliances, particularly with its TRANQUILITY series. Two standout models, the TRANQUILITY 27 and TRANQUILITY 20, deliver innovative features designed to enhance comfort and convenience in everyday living.

The TRANQUILITY 27 is designed for users who demand efficiency without compromising on performance. With its compact size, this air conditioning unit is ideal for small to medium-sized spaces. One of its main features is the advanced inverter technology, which adjusts the compressor speed based on the room's temperature. This ensures a steady and comfortable climate while maximizing energy savings, making it perfect for environmentally conscious consumers.

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On the other hand, the TRANQUILITY 20 caters to those seeking an ultra-compact solution for smaller spaces. This model features a sleek design that seamlessly blends in with any room decor. Its key technologies include the eco-friendly refrigerant that contributes to reduced environmental impact, aligning with Toshiba's commitment to sustainability.

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