CLAS HE R - Installation & Servicing Manual

commissioning AUTO

commissioning AUTO function The AUTO function determines the best power output and flow temperature for the heating system by continually monitoring demand. It uses advanced modulating technology to closely track demand and matches output with the highest precision. This ensures that either with or without the addition of further controls the activation of the AUTO function will enhance boiler performance. Optimum performance can be achieved by the addition of an outdoor sensor and indoor modulating controls. Depending on the peripheral units connected and the number of zones controlled, the boiler adjusts its flow temperature automatically. The various corresponding parameters should therefore be set (see adjustments menu). To activate the function, press the Auto button. Example 2: Single zone system (high-temperature) with on/off room thermostat + outdoor sensor: In this case the following parameters must be set: 4 21 - Activation of temperature adjustment using sensors - Select 3 = outdoor sensor only 4 22 - Temperature adjustment curve selection - Select the relevant curve according to the type of system, installation, heat insulation used in the building, etc (see pae 45). 4 23 - Perform a parallel curve shift if necessary, increasing or decreasing the set-point temperature (this may also be modified by the user, using the heating temperature adjustment knob, which, with the Auto function activated, is used to shift the curve in a parallel manner). NOTE: Two zone temperature management is not suitable for use with Y Plan systems. NOTE: Where an outdoor sensor is connected and the system is supplying stored domestic hot water and a central heating circuit, each circuit must be separately connected to the PCB using the ‘RT’ and ‘Cyl’ connections. Example 1: Single zone system (high-temperature) with on/off room thermostat: In this case the following parameters must be set: 4 21 - Activation of temperature adjustment using sensors - Select 1 = Basic temperature adjustment 2 44 - Boost Time (optional) The wait time for the flow temperature increase in steps of 4°C may be set. The value varies according to the type of system and installation. If the Boost Time value = 00 the function is not activated. This is to ensure a correct flow temperature to the stored hot water in the summer. For further information please contact the Technical Help Desk on 0870 241 8180 40

Boiler protection devices The boiler is protected from malfunctioning by means of internal checks performed by the P.C.B., which stops the boiler from operating if necessary. In the event of the boiler being shut off in this manner, a code appears on the display which refers to the type of shut-off and the reason behind it. There are two types of shut-off: Safety shut-off This type of error is “volatile”, which means that the boiler starts up again automatically as soon as the problem which caused the shut-off is removed; the error is indicated by the «Err» symbol which appears on the display and the error code. In fact, as soon as the cause of the shut-off disappears, the boiler starts up again and continues to operate normally. While the boiler is shut off for safety reasons it is possible to attempt to restore normal operation by switching the appliance off and on again using the on/off button on the control panel. If after attempting this the boiler still shows a safet shut off, switch it off and ensure that the external electrical switch is in the off position. Shutdown This type of error is “non-volatile”, which means that it is not removed automatically. To restore normal operation press the button on the control panel. The first figure of the error code (e.g. 1 01) indicates within which operational assembly the error occurred. 1 - Primary Circuit 3 - Internal Electronic Part 5 - Ignition and Detection 6 - Air inlet - flue gas outlet Malfunction warning This warning is shown by the display in the following format: 5 P1 = FIRST IGNITION ATTEMPT UNSUCCESSFUL the first figure indicating the operational assembly is followed by a P (warning) and the code relating to the specific warning. Important If this shutdown occurs frequently, contact an authorised Technical Service Centre for assistance. For safety reasons, the boiler will permit a maximum of 5 resets in 15 minutes (5 presses of the RESET button); at the 6th attempt within this 15-minute period the boiler will shut down and may only be operated again after the electricity supply has been disconnected. If the shutdown is occasional or an isolated event, this is not a problem. Anti-frost Device. The anti-frost function acts on the central heating flow temperature probe, independently from other regulations, when the electrical supply is turned on. If the primary circuit temperature is between 3°C and 8°C the pump will run until the temperature reaches > 9°C. If the flow temperature remains between 3°C and boiler protection devices 8°C the pump will continue to run for a maximum of 20 minutes unless a temperature above > 9°C is detected in the central heating flow, after this the the burner will fire (heating position) until a temperature of > 30°C is detected. If the central heating flow temperature is < 3°C, the burner will fire (heating position) at minimum power until the temperature reaches > 30°C, the burner will go out. If lockout is caused by overheat the burner will not fire but the pump will continue to run. The anti-frost device activates only when (with the boiler operating correctly): - the boiler is electrically powered; - there is a supply of gas. Table summarising error codes Central Heating circuit Display Description 1 01 Overheat 1 03 1 04 1 05 Insufficient circulation 1 06 1 07 1 10 Flow temp. probe circuit open / short circuit 1 12 Return temp. probe circuit open / short circuit 1 14 External sensor circuit open / short circuit 1 18 Heating delivery probe problem 1 P1 1 P2 Insufficient circulation indication 1 P3 Internal P.C.B.’s 3 01 EEPROM error 3 02 Comunication error 3 03 Main P.C.B. error 3 04 Too many (> 5) resets in 15 minutes 3 05 Main P.C.B. error 3 06 Main P.C.B. error 3 07 Main P.C.B. error Ignition and Detection 5 01 No flame detected 5 02 Flame detected with gas valve closed 5 04 Flame lift 5 P1 1st Ignition Failed 5 P2 2nd Ignition Failed 5 P3 Flame cut-off Air Inlet / Flue gas outlet 6 04 Insufficient fan speed 6 10 Thermofuse open 41