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Trane THS-02 User Manual

Made by: Trane
Type: User Guide
Category: Thermostat
Pages: 12
Size: 0.15 MB

 

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THS-02

Thermostat for heat pump- 2 com-
pressors with auxiliary heating
User’s guide

A70 UG 007 

GB

 


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2

A70 UG 007 E - 0299

© American Standard Inc. 1999

 


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A70 UG 007 E - 0299

Index

3

Operating instructions

4

General information

4

User commands

4

Power cuts

5

Temperature precision

5

Installation instructions

6

Position

6

Removing the thermostat from its base

6

Setting the micro-switches

7

Replacing thermostat on its base

7

Specifications

9

 


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Operating instructions

4

A70 UG 007 E - 0299

Your new THS thermostat has been
designed to provide precise control and
display of the ambient temperature. It
also displays all the other information
you need concerning your system.
The symbols on the keys and the infor-
mation display format make it a prod-
uct that is easy to understand and use.
It is a good idea to set aside some time
to read these instructions and famil-
iarise yourself with the different func-
tions to get the maximum benefit from
this electronic control system.

General information

The thermostat normally displays the
ambient temperature, the operating
mode and indicates whether the unit is
cooling or heating. The six keys on the
front panel give you total control of the
equipment.
You can select different heating and
cooling set points for the system, e.g.
21°C for heating and 24°C for cooling.
To increase or decrease the heating and
cooling set points, you only have to
press one key. In addition you can
choose display in °F or °C.
You can also select continuous fan
operation (useful for an air purifier) or
fan operation linked to operation of the
air-conditioning system.

User commands

MODE:  

❉ 

Select the operating mode you want by
pressing the MODE key several times.

- controls the system in cooling

mode only.

(the word "

COOL

" is displayed

for 5 seconds).

- controls the system in heating

mode only (the word "

HEAT

" is

displayed for 5 seconds).

- controls the system in both

heating and cooling modes
(the word "

AUTO

" is displayed

for 5 seconds.

( )

forced heating (the word “

EHt

is displayed for 5 seconds).

OFF

- stops the thermostat and the

system

COOLING: 

Select the temperature the system
must maintain in cooling mode by
pressing the 

and 

keys. The set

point value is displayed for 5 seconds
with .

HEATING: 

Select the temperature the system
must maintain in heating mode by
pressing the 

and 

keys. The set

point value is displayed for 5 seconds
with .

FAN:

The fan starts automatically when the
system is operating, but this is not indi-
cated on the display unit. To select con-
tinuous operation of the fan press the

key and the screen displays
.

OFF:

When the word “

OFF

“ is displayed, the

system does not operate.
Avoid using the 

OFF 

mode during peri-

ods of extreme cold, to prevent the risk
of frosting.

AUTO:

❉ 

In this mode the system operates in
heating and cooling mode. The thermo-
stat changes automatically from one to
the other according to the chosen set
points.

N.B.: The thermostat always leaves
a difference of 1°C between the
heating and cooling set points.



 


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5

A70 UG 007 E - 0299

KEY 

/

(Outdoor temp. option):

When the outdoor temperature
option is connected to your thermo-
stat, you can display this value by
pressing the  

/

key. If this

option is not connected, the thermo-
stat displays “- -“

KEY / 

(Day/Night):

When the thermostat is initialised,
the symbol 

corresponding to the

day-time temperature is displayed.
By pressing the 

/

key or pow-

ering up the CLK1 and CLK2 termi-
nals at the back of the thermostat
(customer connection), you can
select a relief or night-time tempera-
ture 

. (The thermostat memorises

this temperature).
To alternate between the two tem-
perature settings simply press the

key.

CLOCK TERMINALS (option):
CLK1 - CLK2

If you connect a clock to these termi-
nals, the thermostat can alternate
automatically between the day/night
set point values.

REMOTE SENSOR TERMINALS
(option):
RS1-RS2-RS+V

The THS thermostat is designed to
accept an electronic remote sensor
that will enable you to place the ther-
mostat in an unobtrusive position. 

°C/°F

Press the 

and 

keys simulta-

neously to change the °C /°F display.

Power cuts

One of this thermostat’s special fea-
tures is that it does not need a bat-
tery to conserve the selected set
points if a power cut occurs. Its
memory is not affected by power
cuts, no matter how long they last.
When the current returns, the ther-
mostat will continue to operate as if
the power had never been discon-
nected.

Temperature precision

The thermostat will measure the
temperature exactly once it has been
installed and powered up for at least
one hour.

 


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A70 UG 007 E - 0299

Installation instructions

Position

To operate correctly, the thermostat
must be positioned on an indoor par-
tition wall in a part of the building that
is regularly occupied. In addition, it
must be placed at least 50 cm from
any external wall, at a height of
roughly 1.5 m, in a place where the
temperature represents an average
for the building and where the air cir-
culation is unobstructed. 

Avoid the following locations: 

- Behind doors or in corners where air

does not circulate freely.

- Places where direct lighting or radia-

tor heating installations may affect
the control system.

- On an external wall.
- Next to or facing air-conditioning

discharge grilles, stair wells or exter-
nal doors.

- Places where the presence of water

or steam piping, hot air ducts or an
unoccupied room behind the ther-
mostat may affect its operation

- Near to a unit’s air discharge grille.
- Near to sources of electrical interfer-

ence, such as contact relays.

Removing the thermostat
from its base

1)  Place a flat screwdriver blade in

the the slot in the middle of the
unit’s bottom edge. Pull up the
blade gently until the lid comes off
the base.

2)  Pull the bottom part of the thermo-

stat towards you and rotate it.

3)  Lift up the thermostat to remove it

from the base

4) Connect the system’s wires to the

thermostat, referring to the dia-
gram below. The wiring can then
be inserted in the wall cavity or a
junction box. The access hole
must be made water-tight to pre-
vent air currents inside the wall
affecting the thermostat’s mea-
surements.

5) You need terminal (C) of the 24V

transformer common.

1

2

3

 


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A70 UG 007 E - 0299

Setting the micro-switches

*   Heat pump:

Additional: the compressor system
ceases to operate when the auxiliary
heating is operating.
Normal: the compressor system
and the auxiliary heating can oper-
ate simultneously.

** Auxiliary heating :

Comfort: the auxiliary heating can
be activated as soon as the room
temperature is 2°C below the set
point.
Economic: auxiliary heating ceas-
es to operate if the room tempera-
ture is within 0.5°C of the set point.
Forced heating is never autho-
rised.

Replacing thermostat on its
base

1) Position the thermostat on the

hinge lugs located on top of the
base.

2) Slowly lower the thermostat while

rotating it and press down on the
bottom edge until it clicks into
place.

12

3

4

5

6

7

8

ON

Normal heat pump

Not used

4 min. minimum aux. heat. operat.

Keyboard in operation

Economic auxiliary heating

1 stage

LED 1 free without icon

LED 2 free without icon

Additional heat pump

Not used

2 min. minimum aux. heat. operat.

Keyboard blocked

Auxil. comfort heating**

Multi-stage

LED 1 + filter icon

LED 2 + fault icon

2

1

 


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A70 UG 007 E - 0299

THS 02

W2

G

Y1

W1

Y2

,,

,,

,,

,,

,,

,,

,,

,,

B

O

b
c

d

f

h

W1

Y1

R

24 V

G

O

B

Y2

LED1

LED2

RS+V

RS1

RS2

CLK2

CLK1

a

Compressor 2

Auxiliary heating

Compressor 1 

Fan

Common

Independent power supply

Mains power supply

24 V transformer

Note 1 

Note 2

e

24V(C)

g

 


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A70 UG 007 E - 0299

Output terminal functions

W1

Make-up or forced auxiliary
heating

Y1

Compressor 1 in cooling or
heating

Y2

Compressor 2 in cooling or
heating

G

Fan starting

O

Reversing valve supplied
with cooling

Reversing valve supplied
with heating

Independent power supply

24 V

System 24 V power supply

24 V (C)

24 V common

LED 1

Free LED for status

LED 2

or to indicate function

CLK1

Used with remote clock

CLK2

for alternating set points

RS2

Used to connect the out-
door temp.sensor option

RS1

and/or remote ambient
temp. sensor option

RS+V

Refer to instructions sup-
plied with the sensors.

Note 1: The R terminal can be used for
a second independent power supply.
If there is just one power supply,
bridging is provided between 24V
and R. 

Note 2: This thermostat can operate
using 24VD C. The negative pole must
be connected to the 24V terminal (C).

Specifications

Nominal voltage

20-30 VAC, or
24 VDC nomi-
nal

Current amps (AC)

0.05 to 0.5 A
direct per out-
put with max.
peaks at 1A

Current amps (DC)

0 to 0.5 A
direct per out-
put with max.
peaks at 1A

Control range

Heating: 5 to
30°C in 1°C
stages
Cooling:16 to
40°C in 1°C
steps

Ambient temperature
measurement range

0 to 48°C

Outdoor temperature
measurement range

-48°C to 48°C

Precision 

±0.5°C at 20°C

Minimum dead band

1°C between
heating and
cooling
modes.

Note : This thermostat contains elec-
tronic circuits which replace tradi-
tional mechanical contacts.

 


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A70 UG 007 E - 0299

Notes

 


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A70 UG 007 E - 0299

Notes

 


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Société Trane
BP 6 - 1, rue des Amériques
88191 Golbey Cedex
France

http : // www.trane.com

An American Standard Company

Société Trane  -  Société Anonyme au capital de 41 500 000 F  - Siret  306 050 188-00011  -  
RCS  Epinal B 306 050 188  

Numéro d'identification taxe intracommunautaire : 

FR 83 306050188

A70 UG 007 

GB

 - 0299

Supersedes A70 UG 007 E - 0796

Literature stocking location : Europe

Trane reserves the right to alter any information without prior notice.

For additional information, contact :

Distributor / Installer stamp

The constructor's policy is one of continuous product
improvement, and he reserves the right to alter any
details of the products at any time without notice

This publication is a general guide to install, use and
properly maintain our products. The information given
may be different from the specification for a particular
country or for a specific order. In this event, please refer
to your nearest office.