Optional Programmer - Worcester HEATSLAVE 12/14 User Instructions & Customer Care Manual

6
If 'HEATING' and 'HOT WATER' are
selected together
The central heating will operate in response to any system
controls, and hot water will be supplied when a tap or shower is
turned on. The Heatslave tank will be kept at the pre-set tempera-
ture, as in the HOT WATER mode.
If 'OFF' is Selected
Your central heating and hot water will remain off unless
there is a demand via a frost thermostat (where fitted), in which
case the boiler pump, diverter valve and burner will be activated
until the demand is satisfied. The burner will remain inoperative
in all other circumstances.
If a demand for hot water is made at a tap or shower, primary
water will be pumped from the Heatslave tank through the hot
water heat exchanger. This will provide a limited supply of hot
water, the output depending on the amount of heat stored in the
Heatslave tank. This function could prove useful during periods
when it might be undesirable or uneconomical to keep the
Heatslave tank constantly hot, but when there might be a demand
for small quantities of hot water, such as for hand washing. Such
periods could include overnight and the summer months, when
the demand for hot water is lowest.
In these circumstances the Heatslave tank can be charged up
to maximum temperature once or twice a day as required, with the
programmer in the HOT WATER mode and the hot water control
thermostat set to maximum.

OPTIONAL PROGRAMMER

Where a Worcester facia mounted programmer has been fitted
to your appliance the additional "Heating" only setting is available.
Full installation and operation instructions are included with the
programmer kit.
If 'HEATING' only is selected
The boiler will operate as a conventional oil-fired boiler, giv-
ing output to the central heating circuit in response to the system
controls. A demand for hot water at a tap or shower will override
the central heating for as long as the hot water is drawn off, allow-
ing any residual heat in the Heatslave tank to be utilised.