3
OPERATING INSTRUCTIONS
15
Domestic Hot Water Operation
Hot water is available on demand by turning on a hot tap. This activates the
flow switch which powers the domestic hot water pump ensuring that all
boiler hot water is diverted to the domestic heat exchanger which heats the
incoming mains water to give instant mains pressure hot water.
Hot water is then mixed with mains cold water by a thermostatic mixing valve
set to ensure that it does not exceed 65°C. This is shown in accompanying
diagrams - Item No. 6.
The burner may continue to run after hot water draw off has ceased - to
ensure the pre-set temperature is restored in the heat store. This may also
occur at any time if the control system senses that there is a need to
replenish the heat store, i.e. if there has been natural temperature drop in
heat store during long periods of low demand for domestic hot water.
Programming Guide
SETTING UP
The outer dial should be set to the current time. Rotate the dial slowly
in a clockwise direction, until the correct hour is aligned with the arrow
head printed on the dial. Note that the outer dial is printed with the 24
hour clock -
8:00 a.m. = 8 on the dial. 8:00 p.m. = 20 on the dial.
Do not attempt to rotate the dial in an anti-clockwise direction.
PROGRAMMING SWITCHING TIMES
Set all tappets between the on and off times required, to the outer
edge of the dial (see figure 1). E.g. to set on at 8:00 a.m. - Off at 1:00 p.m.
push tappets between dial numbers 8 and 13 to outer edge of dial. Set any
other required switching times in a similar manner.
MANUAL SWITCH
Manual switch operation: The manual switch will provide Fixed On / Fixed
Off / Auto control, thereby allowing manual control of the switched output
without disrupting the timed (tappet) settings. Please refer to the illustration
above.
The slide switch can be set in one of the three positions available ‘on’ and ‘off’
are fixed selections - the timer will remain in the on or off condition until you
next use the manual switch to change the setting. ‘auto’ is the normal posi-
tion for the switch, allowing control to be governed by the tappet settings -
in accordance with ‘programming switching times’ above
Содержание Combi 120
Страница 10: ...2 TECHNICAL SPECIFICATION 9 2 E F Riello Burner Specification...
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Страница 32: ...Combi Oil Boiler PART 2 Sealed System Domestic Hot Water 31...
Страница 40: ...39 Combi Oil Boiler PART 3 Spare Parts...
Страница 41: ...9 FAULT FINDING 40 T Repair or Replace Oil Pump r No...
Страница 52: ...NOTES...