Table of Contents
Advertisement
4. Operation
4.1 Using the operating switch the boiler can be set to operate either on domestic hot water
only or domestic hot water and heating.
Note: Domestic hot water demand draws preference over heating. During heating periods
the boiler will automatically revert back to heating mode, after a draw off of hot water, but
there will be a 45sec delay if the No.S3 dipswitch is set to the OFF position. See figure 19.
4.2 Depending on demand water is either diverted via the diverter valve to the secondary
water-to-water heat exchanger for domestic hot water or directly to the heating system.
4.3 DOMESTIC HEATING MODE:
• When the Control is set to "Winter" mode and a heating demand is requested,
(power is on, the timer and thermostat are calling for heat) the boiler will fi re automatically.
The integral pump is then energised and hot water from the boilers primary circuit
is circulated around the central heating systems pipe-work and radiators. When the demand
for central heating is no longer present, either the thermostat reaches temperature or
the time clock reaches the end of its set period, the burner will shut down and the boiler will
revert to stand-by, waiting to respond to the next heating or hot water demand. The pump
will continue to operate for a short period of time to dissipate any excess heat from within
the boiler's heat-exchanger. If during the heating period there is a call for hot water this
will take preference over heating. When satisfi ed, the boiler will then supply the heating
demand as required. Note there will be a delay of 45sec delay depending on how the boilers
dipswitches are set. See section 15.3 for details.
4.4 DOMESTIC HOT WATER MODE:
• When the Control is set to either the "Summer" or "Winter" mode and there is a request for
hot water (a hot water faucet is opened) the boiler will fi re automatically. The integral pump
is then energised and hot water from the boilers primary circuit is circulated around
the water to water heat-exchanger, irrespective to any demand for heating, giving up its heat
to the domestic hot water. When the faucet is closed the pump will continue to operate for
a short period of time to dissipate any excess heat within the boiler's heat-exchanger
into the heating circuit and after a 45sec delay will revert back to the heating mode
if required.
5. General Installation
5.1 Installer Testing & Commissioning Tips
•
The installer shall instruct the user in the operation of the boiler, safety devices
contained within the boiler and instruction on the location of the fi lling loop and how to
re-pressurise the system if the water pressure falls. The installer should then hand over
the instructions indicating the included Benchmark Log Book that has been completed.
7
Advertisement
Table of Contents
