UCHBD000X1230 - μChiller Controller DIN rail mounting for ON-OFF Compressor, Compatibility Version with MCH2

Manuals & Datasheets

MANUAL	DATA-SHEET	BROCHURE

Product type	Controller
Manufacturer	Carel
Power Supply	24Vac/Vdc
Parametric	Chiller/Heat Pump Controllers
DIN/Panel Mounted	DIN Rail

Description

The μChiller Controller manages air/water and water/water chillers and heat pumps. Manages up to 2 compressors per circuit (On/Off or BLDC), up to a maximum of 2 circuits (using an expansion board for the 2nd circuit). The μChiller controller is a distinctive and complete controller for high-efficiency units through integrated management of electronic expansion valves and brushless BLDC compressors.

Mounting: DIN rail mounting

Type of Controller: Standard

Connectivity: NFC, Bluetooth (BLE) via External display

LED Display: External

Compressor Management: ON-OFF

Built-in ExV Driver: NO

ExV Valve management: bipolar with External EVD EVO Driver

Number of Circuits: Max 2 (with Expansion Board)

Number of Compressors per ciruit: max 2 (on-off only)

Clock: YES

Power Supply: 24 Vac/dc, +10% - 15%

Inputs and Outputs:

- Analogue Inputs: 7
- Digital inputs: 6
- Analogue Outputs: 2
- Digital Outputs: 6

New “Legacy” part numbers for mCH2 SE phase-out support

To best support and facilitate the phase-out of mCH2 SE, three new part numbers
are now available, in which Carel has implemented a series of functions to cover
the unit configurations managed by mCH2 SE.
Specifically, the following unit configurations have been introduced to these
models, called Legacy:

Air/air unit (cooling only and reverse cycle units)
Condensing unit (cooling only and reverse cycle units)

The references are the unit configurations in the mCH2 SE manual, chapters 3.1,
3.2, 3.8, 3.9, 3.10 and 3.11 (manual ref. +030220426 - rel. 2.6 - 08/07/2019).

The functions implemented concern:

Management of low pressure switch from digital input
System pump burst, system pump activation (at regular intervals)
Light defrost: defrost function with compressors off, based on outside temperature value.
Disable evaporation pressure/temperature probe. On A/W or W/W chillers in cooling mode, frost protection is managed based on the evaporator outlet water temperature. The frost protection function is managed both with a single evaporator and with two separate evaporators.

App update with:

a) Management of new unit configurations
b) Parameters to be configured for compatibility with mCH2 SE. On the “Legacy” models, a new menu is available with specific parameters for the functions implemented, in order to support the phase-out of mCH2 SE.

IMPORTANT: The new Legacy part numbers do not allow plug & play replacement of mCH2 SE, as the two products have different connectors and number of inputs/outputs. Legacy products are software support to manage unit configurations and functions available on mCH2 SE and not available on the new product.

Ref.	Description
Main features	Up to two circuits and 2 + 2 compressors
	Compressors in tandem configuration with possible BLDC compressor
	Air/water chiller or heat pump (A/W)
	Water/water chiller or heat pump (W/W)
	1 evaporator per unit
	Air-cooled condenser with separate/shared air circuit for A/W units
	Water-cooled condenser with single circuit for W/W units
Hardware	Panel mounted model: management of ON-OFF compressors
	DIN rail mounted model: management of ON-OFF compressors
	DIN rail mounted model, enhanced: management of ON-OFF compressors
	DIN rail mounted model, high efficiency: management of BLDC compressors
User interface	7-segment, 2-row LED display, optional pGDx graphic display, communication via APPLICA app (compatible with NFC and BTLE) for mobile devices
Temperature control	PID at start-up
	PID in operation
	Set point compensation on outdoor temperature
Compressor rotation	FIFO or timed
Compressor management	Specific BLDC compressors (see list on KSA - μChiller section)
Compressor management	Generic scroll compressors
Oil management with BLDC	Oil recovery function (extended operation at part load)
Oil management with BLDC	Oil equalisation (tandem with BLDC compressor)
Circuit destabilisation	Forced compressor rotation (extended operation at part load)
ExVdriver	Built-in valve driver on enhanced and high efficiency models
ExVdriver	External driver management via FieldBus port (all versions)
Programming with time bands	UnitON-OFFor2ndsetpoint(1timebandperday)
Programming with time bands	"Noise reduction" function for condenser fans (1 time band per day)
User pumps	1/2 pumps (2 pumps only with 2 circuits)
User pumps	Rotation by time or with pump overload alarm
Water-cooled condenser	1commonpumpforbothcircuits
Air-cooled condenser	Independent fans on each circuit or common to both circuits
	Fan modulation based on condensing temperature (On/Off fan control via CAREL CONVONOFF0 module)
	Optimised start-up to quickly bring the compressor(s) to steady operation
	Fan anti-block protection (harsh climate)
Defrost	Simultaneous
	Separate
	Independent
	Defrost interval managed based on outside temperature ("sliding defrost")
Prevent	Prevention of scroll compressor operating limits in relation to condensing and evaporation temperature
	Evaporator frost prevention
	Total management of the BLDC compressor envelope limits
Alarms	Management of automatic and manual reset according to alarm severity (see the chapter on Alarms)
Alarms	Alarm log (up to 20 events): alarm and reset date and time recorded
Connectivity/supervision	RS485serialport
	Modbus RTU
	Baud rate up to 115200 bit/s
	Frame configurable by Parity (None, Even, Odd) and StopBits (1 or 2); Databits fixed at 8 bits.



The µChiller range on specific model comes with wireless connectivity with NFC (Near Field Communication.) as standard, as well as Bluetooth, allowing interaction with mobile devices using the CAREL “APPLICA” app, making it easier to configure parameters and commission the unit in the field.

UCHBD000X1230 - Carel μChiller Controller DIN rail mounting for ON-OFF Compressor, Compatibility Version with MCH2