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I N S T R U C T I O N S

© 2016 OJ Electronics A/S

1

67621 04/16 - (OSH)

OJ-Air2-WP55

• English

• Deutsch

• Français

• Svenska 

• Norsk

• Dansk

English

LIST OF FIGURES

The following figures are located at the back of 

the instructions:

Fig. 1:  Product, dimensioned sketch

Fig. 2:  Mounting holes, dimensioned sketch

Fig. 3:   Terminal overview

Fig. 4:  Detachment of selector dial

Fig. 5:  Overview of product parts

INTRODUCTION

Read this manual thoroughly and follow the 

instructions it contains before taking OJ-Air2-

WP55 into use.

OJ-Air2-WP55 can be used to advantage in an 

OJ-Air2 system for room temperature measure-

ment and for setpoint offsetting of the desired 

room temperature or inlet temperature in a 

ventilation system. 

In an OJ-Air2 system, the function is already 

integrated into the software and simply needs 

to be selected from the built-in WEB interface in 

the OJ-Air2 system.

OJ-Air2-WP55 can, for example, be mounted 

on the wall of the room that is to be controlled. 

OJ-Air2-WP55 can be used to advantage in for 

example educational and office environments 

as well as similar rooms where it is desired that 

the temperature be able to be adjusted by the 

occupants of the room. 

PRODUCT LINE

TYPE PRODUCT
OJ-Air2-WP55 

 Combined room sensor and 
potentiometer 

KEY TO SYMBOLS

Particular attention should be paid to the sec-

tions in these instructions which are marked 

with symbols and warnings. 

Warning

This symbol is used where there is a risk of 

severe or fatal personal injury.

Caution

This symbol is used where potentially danger-

ous situations may result in minor or moderate 

personal injury. The symbol is also used to warn 

against unsafe and hazardous conditions.

Note

This symbol is used to indicate important 

information and in situations which may result in 

serious damage to equipment and property. 

FUNCTION

OJ-Air2-WP55 is furnished with a built-in room 

sensor (PT1000) as well as a selector dial for 

offsetting the temperature setpoint in an OJ-Air2 

ventilation system. The product is furnished with 

ventilation openings at the top and bottom in 

order for the room sensor to be able to measure 

the correct room temperature. 

Using the product's selector dial, the user 

can offset the desired setpoint for the room 

temperature or inlet temperature in a ventilation 

system (+/-5°C). 

OJ-Air2-WP55 is furnished with the following 

scale -5°C < 0°C > +5°C, which symbolises the 

maximum temperature range within which the 

setpoint can be offset by means of the OJ-Air2-

WP55. 

The -5°C means that the setpoint is being 

lowered, and the +5°C means that the setpoint 

is being raised by 5°C in relation to the value set 

for the OJ-Air2 system. Example: If the desired 

setpoint for the room temperature in the OJ-Air2 

control system is set to 23.0°C, then setting the 

selector dial on OJ-Air2-WP55 to, for example, 

-2°C will offset the temperature setpoint in the 

OJ-Air2 system to 21.0°C, and that will now be 

the new temperature setpoint that the system 

will strive to maintain. 

The output voltage (0-10 V DC) of OJ-Air2-

WP55 on terminals ø3 and ø4 (see Fig. 3) is 

proportional to the selector dial's position. 

When the selector dial is positioned at -5°C, 

then the output voltage at terminals ø3 and ø4 

= 0.0 V DC. 

With the selector dial at the middle position of 

0°C, the output voltage = 5.0 V DC, and with 

the selector dial at the +5°C position, the output 

voltage = 10.0 V DC.

INSTALLATION

 

If the internal temperature sensor in 

OJ-AIR2-WP55 is used for measuring the 

room temperature, then OJ-AIR2-WP55 

must be mounted on the wall approx. 

1.6-1.8 m above floor level and such that 

there is free air circulation around the 

product in order to attain optimum 

measurement and regulation of the room 

temperature. Avoid placing OJ-AIR2-

WP55 in draughts or direct sunlight.

 

If the internal PT1000 temperature sensor 

in OJ-AIR2-WP55 is not being used, then 

no special requirements are posed for the 

placement of OJ-AIR2-WP55. It must be 

ensured however that the product is 

installed with respect to local and 

international supervisory authority 

requirements and installation principles 

such as enclosure rating requirements.

 

Open OJ-AIR2-WP55 by carefully 

detaching the selector dial (see Fig. 5, A).

The selector dial can possibly be loos-

ened with the point of a knife, a flat-blade 

screwdriver or the like (see Fig. 4).

 

Once the selector dial has been detached, 

the screw (see Fig. 5, B) holding the top 

part to the back cover becomes visible. 

Loosen this screw by turning it counter-

clockwise with a Phillips screwdriver.

 

Remove the top part (see Fig. 5, C).

 

Once the top part has been removed, 

the front frame (see Fig. 5, E) can also be 

removed.

 

OJ-AIR2-WP55 is now ready to be 

mounted on the wall structure.

 

The mounting holes on the product's back 

cover must always be used for fastening 

the product to the wall (see Fig. 2).

 

To avoid short-circuits in the product, no 

design modifications may be made to the 

product. New holes must not be made in 

the back cover of the product for 

fastening purposes. 

 

Depending upon the design of the wall, 

it may be beneficial to use rawl plugs in 

concrete and stone structures.

For electrical installation, OJ-AIR2-WP55 is 

furnished with a terminal strip for wires of max. 

1.5 mm

2

 cross-sectional area (see Fig. 3). The 

power supply is 24 V AC/DC and must be con-

nected to terminal strip terminals ø1 (L1/+24 V 

DC) and ø2 (N/-GND) (see Fig. 3). 

The variable output signal (0-10 V DC), which 

is connected to the selector dial, must be con-

nected to terminal strip terminals ø3 – (GND) 

and ø4 (+) (see Fig. 3). On the OJ-Air2Master, 

this signal is connected to analogue input ø12 

or ø13(+) and ø14 (–/GND). 

If it is desired to use the built-in PT1000 sensor 

element, then this signal must be connected 

to terminal strip terminals ø5 and ø6. It is not a 

precondition for the functionality of the product 

that the built-in PT1000 sensor element be 

used.

When OJ-AIR2-WP55 has been mounted on 

the wall, and all electrical connections mounted 

correctly, then OJ-AIR2-WP55 can be put back 

together again. 

 

Check that all electrical connections are 

correctly fastened, and that all wires are 

inside the frame so that the top part can 

be freely mounted without pinching any 

wires. Start by carefully placing the front 

frame (see Fig 5, E) on top of the back 

cover. 

Hold the front frame firmly against the back 

cover with one hand while placing the top part 

(see Fig. 5, C) on top of the front frame with the 

other hand. Tighten the screw (see Fig. 5, B) 

again. The selector dial (Fig. 5, A) can now be 

mounted again.

 

In order for the scale to be appropriate, it 

is important that the potentiometer (see 

Fig. 5, D) be set in the middle position 

(horizontal) precisely as shown in Fig. 5.

Once you have made sure that the potentiom-

eter's selector dial is set as shown in Fig. 5, 

D, then the selector dial (Fig. 5, A) can be set 

on again and carefully pressed into place. The 

line printed on the selector dial must be placed 

horizontally, so it points precisely towards the 

middle position (0°C). 

ADJUSTMENT

If the scale on the front and the expected output 

signal do not correspond, then the selector dial 

can be offset.

Start by carefully detaching the selector dial 

(see Fig. 5, A). 

 

Strandvejen 42 

 Saksild 

 8300 Odder 

86 62 63 64 

 

www.automatikcentret.dk

 

[email protected]

 

 

 

Strandvejen 42 

 Saksild 

 8300 Odder 

86 62 63 64 

 

www.automatikcentret.dk

 

[email protected]

 

 

Содержание OJ-Air2-WP55

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