Baxi Genesis 80 Installation And Servicing Instructions page 6

Genesis
Appliance Operation – Page 6
44 - 45
Supplied By www.heating spares.co Tel. 0161 620 6677
CENTRAL HEATING MODE
With a demand for heating the pump (11) circulates water
through the primary circuit. At a flow rate of approximately
250 I/hr the central heating flow switch (9) operates,
commencing the ignition sequence.
The main burner (6) ignites at 1/3 rate then switches to full
gas rate. The gas valve (7) controls the gas rate "HIGH -
LOW" to maintain the heating temperature measured by the
thermostat sensor (16).
When demand is satisfied the burner is extinguished, the
pump continues to run. The duration of each OFF cycle is 3
minutes before re-lighting automatically. Each ON cycle
commences with a 45 second duration at third gas rate
before switching to full rate if necessary.
On completion of a heating period the pump will continue to
run for a period of 3 minutes (PUMP OVERRUN).
DOMESTIC HOT WATER MODE
Priority is given to hot water supply. A demand at a tap or
shower will override any central heating requirement.
The flow of cold water will operate the DHW flow switch (10)
which requests the 3 way valve (17) to change position to
allow the pump (11) to circulate the primary water through
the secondary DHW heat exchanger (18).
The appliance-will light automatically and the temperature of
the domestic water is controlled by the thermostat sensor
(15).
When the hot water demand ceases the burner will
extinguish and for a period of 3 minutes the appliance
remains ready in the DHW mode before returning to the
central heating mode.
Baxi Heating Ltd.