DUPLEX RB, RC and RDH units are standardly equipped with a built-in digital module placed in a plastic box on outside surface of the unit.

A system can be controlled by:

• CP 05 RD series controller
• 0 - 10 V input from a building management system

The CP controller enables simple remote control of all unit operating modes. It must be connected to a room thermostat that controls operation of a heating equipment. The system provides comfort automatic switching through impulses from a bathroom or a kitchen.

Functions

The digital control module together with the CP controller and a programmable room thermostat provides the following functions:

• selection of a basic unit operating mode:
  1. equal-pressure ventilation with heat recovery
  2. circulation heating and ventilation with heat recovery
  3. circulation heating (occasional ventilation using an impuls from bathrooms or periodically using a timer setting)
  4. negative-pressure ventilation
  5. positive-pressure ventilation - summer
• supply and exhaust fan speed setting
• by-pass damper control (fresh air by-pass)
• heating mode setting
• indication of operating modes by green LEDs
• indication of dirty filters and error alarms by a red LED
• automatic control of a mixing damper
• automatic control of room air temperature with a weekly schedule and night setback - set by the weekly programmable temperature controller
• capilary freeze protection of the hot-water heating coil
• occasional ventilation switching using a bathroom or kitchen impuls with possibility of fan stop delay. (enables 24 V SELV connection, e.g. from a pool humidistat)
• STOP contact (e.g. to be interlocked with a supervisory equipment)
• possibility to connect additional thermostat (e.g. from a separate bathroom water heating system)
• boiler ON command (voltage-free contact max. 230 V/0,5 A)
• setting and limiting of max. air outlet temperature
• changing each fan performance setting (changing the tap wiring of a transformer)
• freeze protection to avoid condensate freezing on a heat exchanger (optional)
• output for automatic control of a ground exchanger damper; according to the outside air temperature (optional) )
• adjustable occasional ventilation ensuring space ventilation even when unoccupied

System wiring diagram

Inputs and outputs of the digital module

input/output	recommended cable	function and application
D1, D2, D3	3 x CYKY 2D x 1,5	input - occasional ventilation switching via 230 V impuls from a bathroom with possible fan stop delay
D4	CYKY 2D x 1,5	input - occasional ventilation switching via 230 V impuls from a kitchen (without fan stop delay with function against spread of odours)
D11	SYKFY 2 x 2 x 0.5	input - occasional ventilation switching via a contact (no stop delay) - e.g. from a pool humidistat
STP	SYKFY 2 x 2 x 0.5	input - closing contact - enables to switch the unit OFF
TR2	SYKFY 2 x 2 x 0.5	input - optional 2nd room thermostat for a room heated by a hot-water heating circuit (e.g. Bathroom)
SR	CYKY 3D x 1,5	output - control of ground exchanger damper or E1 shutoff damper
YV	CYKY 3C x 1,5	output 230 V / 0,5 A  - switching of a boiler or a warm-air heating circuit
K	CYKY 2A x 1,5	free-voltage output contact - switching of a boiler
IN1, IN2, IN3	3 x SYKFY 2 x 2 x 0.5	input - standard 0 - 10 V control signal from a BMS system (only without the CP 05 RD controller)
OC1, DA2	SYKFY 2 x 2 x 0.5	output - error and dirty filter alarm via standard 0 - 10 V signal

Controls by a supervisory control system (e.g. BMS)

The built-in control module for the DUPLEX RB, RC, RD, RDH units enables to control by several 0 - 10 V analogue control signals. This control method is suitable for so called "inteligent buildings", where a centralized control system controls all the building equipment.

More information will be provided on request.