Bosch Appliances 24I RSF manual Hot Water Supply, Room thermostat connections

9.Hot Water Supply

9.1The following are general requirements and, if necessary, reference should be made to the local Water Company before fitting the appliance.

9.2MAINS COLD WATER INLET. Devices capable of preventing the flow of expansion water must not be fitted unless separate arrangements have been made.

A mini expansion vessel kit is available which contains the necessary parts for fitting an internal expansion vessel to the appliance.

See Section 19 COMPONENT PARTS LIST.

A thread sealant compatible with potable water must be used. An external expansion vessel may be fitted on the mains cold water connection to the appliance.

9.3The final 600mm of the mains cold water connection to the appliance should be made in copper tube only.

9.4The appliance is suitable for a mains pressure of up to 10 bar (150 lb/in2).

9.5The appliance is fitted with a mains supply isolating valve.

9.6The maximum domestic hot water flow rate is 8.0 litres/min (±15%) (1.8 gallons/min).

9.7In winter (when the mains inlet water temperature is lower) a reduced flow rate at the taps may be required to achieve the type of hot water delivery temperature available in warmer weather.

9.8It is suggested that long pipe runs to the taps or shower should be insulated to prevent the rapid cooling of domestic hot water after a tap or shower has been turned off.

9.9Hot and cold taps and mixing valves used with this appliance must be suitable for operating at mains pressure and temperatures of 65¡C.

9.10No anti-syphonage arrangements are necessary except for some loose head showers. See also Section 9.11 following.

9.11Thermostatically controlled or pressure equalising shower valves will guard against the flow of water at too high a temperature.

9.12The head of a loose head shower must not fall closer than 25mm (1in.) above the top edge of the bath to prevent its immersion in bath water. Alternatively the shower must be fitted with an anti-syphonage device at the point of the flexible hose connections.

9.13The supply of hot and cold mains water direct to a bidet is permitted, (subject to local Water Company requirements), provided that the bidet is of the over-rim flushing type. The outlet(s) should be shrouded and unable to have any temporary hand held spray attached. No anti-syphonage arrangements are necessary.

9.14LIME SCALE. In temporary hard water areas (more than 350mg/litre or 200ppm calcium bicarbonate) it is recommended that a proprietary scale reducer is fitted in the mains cold water connection to the appliance. Consult the local water company for additional advice.

Installation of a scale inhibitor assembly should be in accordance with the requirements of the local Water Company. An isolating valve should be fitted to allow servicing. The water hardness can be determined by reference to the local Water Company.

9.15NOTE: HOT WATER ONLY.

If required the appliance may be used for Hot Water only before the Central Heating is connected. A 22mm copper by- pass pipe at least 4 meters long must be connected between the Central Heating Flow and Return, but it is advisable to connect a small radiator instead.

IT IS NOT RECOMMENDED TO USE THE BOILER IN THIS CONDITION FOR EXTENDED PERIODS.

Fig. 5. 230V room thermostat connections.

RN RI RL

X2

Remove link

Neutral Switched live Live

Fig. 6. 230V programmer connections.

CN CI CL

X2

Neutral	live
	Switched	Live	Remove link

Motor

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