2
0 Introduction
READ THESE INSTRUCTIONS CAREFULLY BEFORE INSTALLING AND USING THE EQUIPMENT!
THIS INSTRUCTION HAS BEEN MADE WITH THE GREATEST CARE.
HOWEVER, THIS INSTRUCTION CONFERS NO RIGHTS. WE RESERVE THE RIGHT TO CHANGE
ALL OR PART OF THE CONTENTS OF THIS INSTRUCTION WITHOUT PRIOR NOTICE.
This instruction contains all information necessary for an optimal installation and startup by skilled
personnel. It can also be used as a manual for maintenance and service work.
It is absolutely important to follow the instructions in this manual very thoroughly in order to guarantee the
correct function of the unit. Not following the instructions in this manual and/or using non-original parts
lead to a lapse of any warranty and liability claims.
Please contact Paul Wärmerückgewinnung GmbH for further assistance if there are any questions left
which are not covered in this manual.
The following symbols are used in this manual:
Attention, special note!
Risk of: - physical injury of user or installer
- damaging the unit
- failures if the instructions are not followed thoroughly
1 Brief product description
The BUS thermostat is used as control unit of the universal control for the components frost protection,
supply heater battery and ground pipe diverter valve. In connection with the necessary sensors, e.g.
temperature sensor, flow sensor and room thermostat or motor/proportional valve, this module controls
the necessary parameters for a save, comfortable and energy efficient operation of the ventilation system.
The central communication control / monitoring including the 24 VDC power supply of the controller is
realized via the RS485 BUS. The BUS thermostat is equipped with a pulse packet controlled or direct
power output.
2 Installation
The BUS thermostat shall be installed max. 2 m away from the device it controls. The housing is surface-
mounted using 4 screws.
A 230 VAC power supply has to be provided next to the BUS thermostat. The BUS thermostat has
protection class IP 20.
2.1 Electrical connections
The electrical connections of the BUS thermostat have to be executed by
professionals according to DIN-VDE standards part 1!
The BUS thermostat's mains cable with safety plug has to be connected to the 230 VAC mains socket.
The control cable is led through a cable gland and, according to the type of device, connected to the
terminals 7 to 11 of the terminal strip X1. The sensor and actuator cables are led through a cable gland
and connected to the corresponding terminals of the terminal strip X1 or terminal strip X2.
A CAT 5 network cable connects the RJ45 female connector of the BUS thermostat with the RJ45 female
connector of the adapter board (if only one component is installed) or with the RJ45 female connector of a
Y-board (Extension for connection of 2 components). Figure 1 shows the basic arrangement for
communication of the internal RS485 BUS is shown.
