BN Thermic B16C - User Manual

Thank you for purchasing a BN Thermic product. Manufactured to a high standard, this product will,
if used according to these instructions and properly maintained, give you years of trouble free
performance. Please ensure instructions remain with your customer for their reference.
SECTION A – USER INSTRUCTIONS.
For installation instructions go to page 4
1. INTRODUCTION & SPECIFICATION.
The B16C Thermostat is an easy to install and use 7 Day, 6/1
Day or 5/2 Day Programmable Room Thermostat which offers
four time and temperature changes each day. It is designed to
provide automatic time and temperature control for underfloor
heating using air temperature and a floor sensor. All settings
are stored in the controller with battery back-up.
B16C- Programmable Heater Controller
Programming 7 Day, 6+1 Day or 5+2 Day (Default 5+2 Day)
Power Supply 230V ac 50 Hz 16A Maximum Load (Battery back-up)
Floor Temperature Sensor NTC (10KΩ) +/- 0.5°C at 20°C
Temperature Range 1°C to 45°C (Default 5°C to 30°C)
Display
LCD + back light that comes on for short period when any button
pressed.
Number of Programs Per Day 4
Tamper Resistant
Facility for locking all buttons or just temperature adjustment
buttons.
Dimensions
86mm x 86mm x 15mm deep when recessed. Fits standard
recess boxes.
Electrical Protection Class II IP20
Complies with:
EN 301489-1, EMC Directive 2014/30/EU,
EN60950-1:2006+a11:2009+a1:2010+a12:2011+
a2:2013
IMPORTANT: PLEASE READ THESE INSTRUCTIONS, NOTE THE SAFE
OPERATIONAL REQUIREMENTS, WARNINGS, AND CAUTIONS. USE THIS
PRODUCT CORRECTLY, AND WITH CARE FOR THE PURPOSE FOR WHICH IT
IS INTENDED. FAILURE TO DO SO MAY CAUSE DAMAGE AND/OR PERSONAL
INJURY AND WILL INVALIDATE THE WARRANTY.
INSTRUCTIONS FOR:-
PROGRAMMABLE CONTROLLER
Model:- B16C
REGISTER: PLEASE REGISTER THIS PRODUCT ONLINE TO ACTIVATE
YOUR GUARANTEE AT www.bnthermic.co.uk

Summary

SECTION A - USER INSTRUCTIONS

Introduction and Specification

Overview of the B16C Thermostat, its features, and programmable capabilities for underfloor heating.

OPERATING GUIDE

Setting Time and Week Day Number

Step-by-step guide on setting the thermostat's time and day of the week using its buttons.

Pre-set Programming Schedule

Displays the default pre-set times and temperatures for different periods and days.

Adjusting Time and Temperature Periods

Instructions on how to manually adjust or program the thermostat's time and temperature periods.

Understanding Run Modes

Explains how to operate the thermostat in different modes like Auto and Manual.

Controller Locking Function

Details how to lock the thermostat's buttons to prevent unauthorized changes.

Holiday Mode Operation

Describes the function and setup for the Holiday Mode to maintain a lower temperature.

SECTION B - INSTALLATION AND MASTER SETTINGS

Installation Safety Instructions

Crucial safety guidelines for electrical installation and general handling of the thermostat.

General Safety Instructions

General safety advice for handling, use, and precautions against misuse.

Choosing a Location

Guidance on selecting the optimal mounting location for the thermostat.

Physical Installation Steps

Detailed instructions on physically mounting and connecting the thermostat.

CHANGING THE MASTER; DEFAULT SETTINGS

Master;Default Settings Configuration

Detailed list and explanation of master/default settings that can be changed, including calibration, differentials, and modes.

BATTERY REPLACEMENT

Battery Replacement Procedure

Step-by-step guide for replacing the internal battery that maintains settings during power loss.

SENSOR FAULT CODES

Sensor Fault Codes Explanation

Explains fault codes E1 and E2 related to sensor issues and their impact on heating.

Overview

1. Function Description
2. Usage Features
3. Maintenance Features

The BN Thermic B16C is a programmable controller designed for underfloor heating systems, offering flexible time and temperature control. This device is engineered to provide reliable performance when used according to its instructions and properly maintained. It is crucial for users to retain the instructions for future reference.

Function Description

The B16C functions as a 7-day, 6/1-day, or 5/2-day programmable room thermostat, allowing for up to four time and temperature changes each day. Its primary role is to automatically regulate underfloor heating based on both air temperature and input from a floor sensor. All programmed settings are stored within the controller and are maintained by a battery backup, ensuring that settings are not lost during power outages.

Usage Features

Programming Flexibility: The controller offers three programming selections: 5+2 days (default), 6+1 days, or 7 days. In the 5+2 day mode, Monday to Friday settings are identical, with separate programming for Saturday and Sunday. The 6+1 day mode allows for identical settings from Monday to Saturday, with a distinct program for Sunday. The 7-day mode enables different settings for each day of the week.

Time and Temperature Adjustment: Users can easily set the current time and day number. To adjust programmed time and temperature periods, the thermostat must be on. By pressing and holding the SET button, users can enter programming mode, where they can modify the hours, minutes, and desired temperatures for each of the four daily periods. The display indicates which days are being programmed (e.g., "12345" for weekdays, "6+7" for Saturday and Sunday). If no button is pressed for approximately 5 seconds, the controller automatically saves the settings and exits programming mode.

Run Modes: The B16C supports multiple operating modes:

• On/Off: The thermostat can be turned on or off with a dedicated button.
• Auto Mode: In this mode, the thermostat follows the programmed schedule. Users can temporarily override the set temperature, and this override will remain active until the next programmed period. The override is indicated by specific symbols on the display.
• Manual Mode: In manual mode, users can set a desired temperature that the thermostat will maintain indefinitely until it is switched back to auto mode or turned off.
• Floor Sensor Temperature View: If a floor sensor is connected, its temperature can be viewed by pressing and holding a specific button for about 3 seconds. The display will show the floor temperature, then revert to air temperature upon release.

Holiday Mode: The holiday mode allows users to set a countdown of days and a lower temperature set point for when they are away. This feature ensures energy savings while preventing the heating system from being completely off. To activate, users access the holiday settings, change the status from Off to On, set the number of days they will be away, and then set the desired temperature for the holiday period. A specific symbol on the screen indicates that holiday mode is active. It can be exited early by pressing the SET button.

Locking the Controller: The controller includes tamper-resistant features with two lock settings:

• Half Lock: Only allows the On/Off button to be pressed.
• Full Lock: Disables all buttons except for the unlock sequence. Locking is activated by pressing and holding a button until a lock symbol appears on the screen. Unlocking is the reverse process.

Window Opening Detection: This feature can be configured to detect a sudden drop in temperature, indicating an open window. When detected, the heating can be set to turn off to conserve energy. Users can also specify an "OFF period" for this function, ranging from 5 to 40 minutes, during which the heating remains off after a window opening event.

Power Cut Function: Users can configure how the controller behaves after a power cut:

• Power heating as per controller memory: The controller resumes operation according to its last settings.
• Shut down controller after power cut: The controller remains off until manually reactivated.
• Shutdown heating but turn controller on after power cut: The controller turns on but keeps the heating off.

Maintenance Features

Battery Replacement: The B16C contains an internal battery that preserves settings during power failures. If the settings are not remembered after a power cut, the battery needs replacement. This process involves ensuring the mains power is off and isolated, removing the front screen panel, disconnecting the internal plug, replacing the CR1220 Lithium Cell battery (ensuring correct polarity), and then reassembling the unit.

Temperature Calibration: The temperature reading can be calibrated from -9°C to +9°C in 0.5°C steps. This allows users to fine-tune the thermostat's reading to match another thermostat or a known accurate temperature source.

Differential Settings:

• Differential between set point and On and Off: This setting, adjustable from 0.5°C to 2.5°C in 0.5°C steps, determines the temperature difference required for the heating to turn on or off relative to the set point.
• Floor sensor differential: Adjustable from 1°C to 9°C in 1°C steps, this setting applies when a floor sensor is used, influencing its activation threshold.

Sensor Configuration: The controller supports various sensor configurations:

• Built-in sensor only (N1): Uses only the internal air temperature sensor.
• Floor sensor only (N2): Relies solely on the floor sensor.
• Built-in sensor and floor sensor (N3): Utilizes both sensors. If the floor sensor temperature exceeds its set point, the load will turn off (indicated by a flashing symbol) until the temperature drops, at which point heating will resume until the room temperature is reached.

Sensor Fault Codes: The thermostat displays E1 or E2 fault codes if the sensors are faulty or not connected. In such cases, the thermostat will cease heating until the fault is resolved. If the N3 sensor option is selected, a floor sensor must be present and operational; otherwise, an E2 fault code will be displayed, and the system will not function.

Factory Reset: A factory reset option is available, which can be activated by pressing and holding the OK key until the entire screen shows, restoring all settings to their default values.

BN Thermic B16C Specifications

General

Mounting	Wall Mounted
Switching Current	16A
Input Voltage	230V AC
Output Voltage	230V AC
Protection Class	IP20
Operating Temperature	0 - 50°C