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
Note: Domestic hot water demand draws preference over heating. During Note: Domestic hot water demand draws preference over heating. During
Note: Domestic hot water demand draws preference over heating. During
heating periods the boiler will automa
heating periods the boiler will automaheating periods the boiler will automa
heating periods the boiler will automatically revert back to heating mode after a
tically revert back to heating mode after a tically revert back to heating mode after a
tically revert back to heating mode after a
draw off of hot water but there will be a 45sec delay if the No.
draw off of hot water but there will be a 45sec delay if the No.draw off of hot water but there will be a 45sec delay if the No.
draw off of hot water but there will be a 45sec delay if the No.S
SS
S3 dipswitch is set
3 dipswitch is set 3 dipswitch is set
3 dipswitch is set
to the OFF position. See fig
to the OFF position. See figto the OFF position. See fig
to the OFF position. See figure
ureure
ure 19
19 19
19 .
..
.
4.2
4.2 4.2
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
4.3 DOMESTIC 4.3 DOMESTIC
4.3 DOMESTIC HEATING
HEATING HEATING
HEATING MODE:
MODE: MODE:
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 fire
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 satisfied 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:
4.4 DOMESTIC HOT WATER MODE:4.4 DOMESTIC HOT WATER MODE:
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 fire
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.
5.1 Installer Testing & Commissioning Tips
5.1 Installer Testing & Commissioning Tips5.1 Installer Testing & Commissioning Tips
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 filling
the location of the filling the location of the filling
the location of the filling loop and
loop and loop and
loop and
how to re
how to rehow to re
how to re-
--
-pressurise the system if the water pressure falls.
pressurise the system if the water pressure falls.pressurise the system if the water pressure falls.
pressurise the system if the water pressure falls. The installer should
then hand over the instructions indicating the included Benchmark Logbook that
has been completed.
