(K) to the 'Winter'position, see diagram 1 .•Turn the central heating temperature control Setting to SUMMER mode (Hot water only) •Turn the OFF/Summer/Winter selector switch to (J) Starting the boiler •Turn the OFF/Summer/Winter' switch (K) to the'Summer'position, Setting to WINTER mode (Heating and hot water) to the desired setting, (I) to the desired setting, see diagram 1. see diagram 1. Before starting the boiler check that: •The gas meter tap is open. •The boiler gas service cock is open. •The boiler is connected to the electrical supply and turned on. (I) to the desired setting, see diagram 1. see diagram 1. •Turn the domestic hot water temperature con- trol •Make sure that any external controls are calling for heat. The heating system will begin to heat up.To obtain domestic hot water, open a hot watertap. Hot water always has priority over central heating.Caution: The boiler is installed as part of a sealedsystem which must only be drained and filled by a competent person. •Turn the domestic hot water temperature con- trol To obtain domestic hot water, open a hot watertap. Hot water always has priority over central heating. Heating safety valveCAUTION: MUST NOT BE TOUCHED A safety valve with a discharge pipe isfitted to this boiler. The valve except by a com-petent person. If the valve discharges at any time, switch the boiler off and isolate it from the electri- cal supply. Contact your installation/service com- pany. Draining and filling ° C. Whenthe temperature reaches 16 ° C, the boiler stops. Note: This device works irrespective of any roomthermostat setting and only protects the boiler. Al- ways ensure that adequate frost protection is given to the entire system where necessary.

DRAINING

THELIA 30 E boiler has a built in frost protectiondevice that protects the boiler from freezing. If the boiler is to be left and there is a risk of frost, ensure that the gas and electrical supplies are left con- nected and that the OFF/Summer/Winter switch is left in the'Summer' or 'Winter' position.The frost pro- tection device will light the boiler when the tem- perature of the boiler water falls below 6 Protection against freezing If the boiler is to be out of use for any long periods during severe weather conditions, it is recom- mended that the whole system, including the boiler, be drained to avoid the risk of freezing. If in doubt, consult your servicing company.The Cleaning

SERVICING/MAINTENANCE CONTROLS AND LIGHTING

The boiler casing can be cleaned with a damp cloth followed by a dry cloth to polish. Do not use abrasive or solvent cleaners. Boiler casing CAUTION . Do not remove or adjust the casing inany way, as incorrect fitting may result in faulty op- eration. If inTo ensure the continued efficient and safe opera-tion of the boiler, it is recommended that it is checked and serviced at regular intervals. The fre- quency of servicing will depend upon the installa- tion conditions and usage but, in general, once a year should be enough. 4