Ferroli CRONO REM - User Manual

Need help?

Do you have a question about the Ferroli CRONO REM and is the answer not in the manual?

Overview

Function Description
Important Technical Specifications
Usage Features
Maintenance Features
Installation

The Ferroli Crono Rem is a modulating remote control designed for use with boilers operating on the OpenTherm protocol. It functions as a chronothermostat, allowing users to manage and program heating and domestic hot water (DHW) settings, as well as monitor various boiler parameters.

Function Description:

The Crono Rem provides comprehensive control over a boiler system, offering both automatic and manual modes for temperature management. It features two ambient temperature setpoints: Comfort and Economy, which can be programmed for specific time bands and days of the week. In "INV" (winter) mode, both heating and DHW circuits are active, while in "EST" (summer) mode, only the DHW circuit is active. The device also includes timed functions like "Vacation" and "Party" mode, allowing for temporary temperature adjustments over specified durations.

A key feature is its weather compensation capability, which adjusts the boiler's flow setpoint based on the outside temperature. This is achieved through an algorithm that considers ambient setpoint, ambient temperature detected by the integrated sensor, weather compensation with ambient influence (KORR), filtered outside temperature (EST A), weather curves (KREG), and a fixed point offset (SP). The device can also act as a remote interface for the boiler, directly managing the boiler flow setpoint if the ambient probe is not active.

The Crono Rem allows users to view and modify a wide range of parameters through its "INFO" and "PROG" menus. The "INFO" menu displays real-time data such as boiler flow temperature, external probe temperature, boiler hydraulic circuit pressure, return temperature, DHW probe temperature, flue gas temperature, and modulation level. The "PROG" menu enables date and time settings, heating circuit time programming, storage tank time programming, and modification of various system parameters, including Comfort and Economy setpoints, frost protection threshold, and weather compensation settings.

Important Technical Specifications:

Protocol: OpenTherm
Ambient Temperature Setpoints: Comfort (up to 30°C) and Economy (from NOFRX +0.5°C to Comfort -0.5°C)
DHW Setpoint Range: Parameter communicated by the boiler card, adjustable in 1°C steps.
Temperature Resolution: 0.5°C for ambient setpoints, 1°C for DHW setpoint.
Timed Functions Duration: Minimum 10 minutes, maximum 45 days.
Weather Compensation Parameters:
- KREG (Weather curve slope): 0.1 to 5.0 (default 1.0)
- SP (Fixed point offset): 20°C to 40°C (default 40°C)
- KORR (Ambient correction): 0 to 20 (default 4)
- BUILD (Building factor): 0 to 10 (0 = no attenuation, 10 = maximum attenuation)
Ambient Probe Correction (OFFTR): -3°C to +3°C (default 0°C), adjustable in 0.1°C steps.
Temperature Control Device Class (Regulation 811/2013):
- Class V: +3% seasonal space heating energy efficiency contribution (Remote timer control kit)
- Class VI: +4% seasonal space heating energy efficiency contribution (Remote timer control kit combined with external probe; installed on boiler equipped with modulating burner)
- Class VIII: +5% seasonal space heating energy efficiency contribution (Zone manager kit combined with 3 remote timer control kits; installed on boiler equipped with modulating burner)

Usage Features:

The device features an intuitive user interface with dedicated buttons for navigation and parameter adjustment. The main display shows the current time and ambient temperature (or boiler flow setpoint). Users can easily switch between operating states (OFF, INV, EST) and ambient setpoint management modes (AUTO, COMFORT, ECONOMY).

Time Programming: Allows setting up to four daily time bands for heating, with individual day or group-of-days programming options. DHW programming also supports four daily time bands, though not differentiated by day of the week.
Installer Menu: Provides access to advanced parameters (e.g., CHMAX, CHMIN, AMBON, CL EN, PSW) for professional configuration. Access requires a password (default 77 for TSP parameters).
Fault and Block Display: Clearly indicates system anomalies ( blinking) and blocks ( alternating with >>OK) with error codes. Blocks can be reset by pressing the OK button.
Remote Loading: If the boiler supports remote system loading, this function can be activated via the Crono Rem. In case of low water pressure, an "ERROR" message will appear, and users can initiate the loading process by pressing the OK button.

Maintenance Features:

The Crono Rem itself requires minimal maintenance. However, it plays a crucial role in monitoring the boiler's operational status and displaying fault codes, which aids in diagnosing and troubleshooting boiler issues. The internal backup battery ensures that date and time information is retained during power outages, requiring a charging phase ("CLOW" message) upon initial power-up or after prolonged disuse.

Installation:

Installation involves disconnecting the boiler's power, removing any OpenTherm jumper on the boiler's terminal block, opening the remote control unit, routing two wires from the boiler's OpenTherm terminal through the base, connecting them to the remote control's terminals, securing the base to the wall, attaching the front panel, and finally, restoring power to the boiler. It is crucial to avoid placing communication cables near heat sources, high voltage, or magnetic fields to prevent communication problems (indicated by E88 fault on the boiler display).