Evo Heat Pump Manual Version 5
Page 68 of 84
temperature is not increasing above a settable differential for a settable period of time it activates a relay
to activate a supplementary heat source. The call for supplementary heating will cancel once the return
temperature increases to within the settable cut out differential.
•
Time delay (HH:MM)
-
The period of time in hours that the return temperature stays below the set
point temperature minus the cut in differential. i.e. If the cut in differential is 10
o
C and the set point
is 45
o
C, the amount of continuous compressor run time while the return temperature is below 35
o
C
before the supplementary heat is called for.
•
Cut
-
In Diff (
o
C)
-
The set difference between the return temperature from the heating distribution
system and the point where the period of continuous compressor operation (Time delay) is
measured.
•
Cut
-
Out Diff (
o
C)
-
The set difference between the return temperature from the heating distribution
system and the point at where the supplementary heat call is cancelled.
6.5.2.9 Commissioning—set up page
2
—DHW Parameters
•
Min Stopping Time (HH,MM)
-
Amount of time before a second DHW cycle is allowed to restart
following a completed DHW cycle. During this period the heat pump can/will provide space heating
if there is a call for this, but will not enter a second DHW cycle.
•
Excessive Running Time (HH:MM)
-
If the Excessive DHW warning is enabled this sets the time of
the DHW cycle where it is deemed to be excessive. This should be longer than the expected
‘
normal
’
DHW cycle time.
•
Ext. Immersion Run Time After DHW Cycle (HH:MM)
-
If the External Immersion Relay is enabled,
this sets the time of the immersion heater cycle that will occur after the DHW cycle. This function
should only be enabled if a DHW temperature greater than the heat pump can provide is required
by the client. Please note that running the immersion heater should be kept at a minimum to
reduce running costs.
•
Pasteurisation—If the Pasteurisation function is enabled, this sets the time schedule (Days) and the
duration of the cycle (HH:MM) During a pasteurisation a call signal is sent to an external relay to
operate the immersion heater.
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Fig 80 Commissioning —Set
up page
2
—DHW parameters
menu