Carel uChiller - Electronic Control For Chiller And Heat Pump Manual

Table of Contents

Contents

1 Description
2 USER TERMINAL
3 MOBILE DEVICE
- 3.1 Using NFC
- 3.2 Using BLE
4 COMMISSIONING
- 4.1 PREPARATION
- 4.2 CONFIGURATION
5 ALARM TABLE
6 TECHNICAL SPECIFICATIONS (for both models)
7 PANEL MOUNTING MODEL
8 DIN RAIL MOUNTING
- 8.1 Dimensions
- 8.2 Mounting
9 WIRING CONNECTION
10 Documents / Resources
- 10.1 References
- 10.2 Download manual

Description

μChiller is the Carel solution for complete management of air/water and water/water chillers and heat pumps. The maximum configuration manages 2 compressors per circuit (On/Off or BLDC), up to a maximum of 2 circuits (using an expansion card for the inputs and outputs on circuit 2). The distinctive element of μChiller is complete control of high-efficiency units through integrated management of electronic expansion valves and brushless DC compressor, thus ensuring greater compressor protection and reliability, together with high unit efficiency. The user terminal allows wireless connectivity with mobile devices and is integrated into the panel-mounted models, or purchased separately on DIN rail mounted models. The CAREL "APPLICA" app, available on Google Play for the Android operating system, facilitates configuration of the parameters and unit commissioning in the field. The operation of μChiller is described in the user manual + 0300053EN downloadable, even prior to purchase, from the website www.carel.com.

USER TERMINAL

key

Keypad
Main field
Icons: device status & operating mode

Icons description
Icons

Keypad

Button		Function
	UP	Navigation: previous parameter Parameter setting: increase value
	DOWN	Navigation: next parameter Parameter setting: decrease value displayed. MAIN MENU: Pressed briefly: unit overview display Pressed and held (3 s): access user profile parameters (set point, unit on-off, ...)
	Alarm	Pressed briefly: display active alarms and mute buzzer. Pressed and held (3 s): reset alarms.
	PRG	During navigation: access the parameter setting menu During parameter setting: pressed briefly: confirm the value pressed and held (3 s): return to the main menu

MOBILE DEVICE

The "Applica" app can be used to configure the µChiller controller from a mobile device (smartphone, tablet), via NFC (Near Field Communication) or BLE (Bluetooth Low Energy). Procedure (modify parameters):

download the CAREL "Applica" app for Android devices from Google Play Store;

(on the mobile device) activate NFC/Bluetooth communication and data connection;
open Applica;

Using NFC

move the mobile device near to the user terminal, maximum distance 10 mm, so as to recognise the configuration;
enter the password (*);
set the parameters as needed;
move the mobile device near to the user terminal again to upload the configuration parameters;

Using BLE

move the mobile device near to the user terminal, maximum distance 10 m, to recognise the configuration;
enter the password (*);
set the parameters as needed.

(*) pre-assigned by the chiller manufacturer to allow maintenance only by authorised service technicians.

during the first connection, Applica aligns itself with the software version on the µChiller controller via a cloud connection; this means a mobile data connection is needed at least for this first connection.

COMMISSIONING

The procedure for initial commissioning is described below.

PREPARATION

Before configuring the unit the first time, access KSA (ksa.carel.com), select the "Configurations" folder and:

for the μChiller Standard and Enhanced models (with On/Off compressor) select the "Refrigerants" section and then the refrigerant charged in the unit;
for HE models (with BLDC compressor), import the BLDC configuration, selecting the "BLDC compressors" section and then the brand and model of compressor installed on the unit (this already includes the refrigerant setting)
import the downloaded configuration into the mobile device.

CONFIGURATION

start Applica and access the Manufacturer and Service profiles;
select Set-up -> Configuration and click the + icon (see image)
use the menu (Fig. a) to select and apply the desired configuration;
select Unit Set-up (Fig. b) to proceed with the complete configuration (Fig c).

ALARM TABLE

ALARM CODES TABLE - Part 1
ALARM CODES TABLE - Part 2

TECHNICAL SPECIFICATIONS (for both models)

Technical specifications, μChiller PANEL and DIN

Physical specifications

Environmental conditions

Electrical characteristics

User interface

Connectivity

Analogue inputs (Lmax=10m)

Digital inputs

Valve output

Analogue outputs

Digital outputs

Note: the sum of the current drawn by NO1, NO2, NO3 and N04 must not exceed 8A.

Emergency power supply

Probe and terminal power supply

Cable lengths

Conformity

PANEL MOUNTING MODEL

Dimensions

PANEL MOUNTING MODEL - Dimensions

Mounting

PANEL MOUNTING MODEL - Mounting

Place the controller in the opening, press lightly on the side tabs and then on the front until fully inserted (the side tabs will bend, and the catches will attach the controller to the panel).

IP65 front protection is guaranteed only if the following conditions are met:

maximum deviation of the rectangular opening from flat surface: ≤ 0.5 mm;
thickness of the electrical panel sheet metal: 0.8-2 mm;
maximum roughness of the surface where the gasket is applied: ≤ 120 μm.

Note: the thickness of the sheet metal (or material) used to make the electrical panel must be adequate to ensure safe and stable mounting of the product.