Additional Heating, Hot Water - Oilon EasyAce Operation Manual

4.6 Additional heating, hot water

Start delay with
compressor
Power increase
delay
Power decrease
delay
Mode for hot
water: operating
mode selection for
domestic hot water
heating
M8004 2308EN
Device settings → Service → Hot water → Additional heating
The electric heater's delay for heating domestic hot water. Once the delay has
elapsed, the first electric heater power stage will switch on.
● Typical setting: 60–180
● Increase the delay to move forward the point at which the heater is switched on
(and starts to supplement the compressor).
The delay is based on degree minutes, and it applies when the compressor is
running and the flow temperature is below its setpoint.
● Delay calculation: flow temperature setpoint – measured flow temperature.
● Flow temperature setpoint: DHW setpoint + charging difference
● The following power stages are governed by the Power increase delay instead.
The electric heater's delay for heating domestic hot water after the first power stage
has switched on. Once the delay has elapsed, the next electric heater power stage
switch on.
● Typical setting: 20–40
● Increase the delay to move forward the point at which the next power stage
switches on to supplement the compressor and the first stage.
The delay is based on degree minutes, and it applies when the compressor is
running, the electric heater's first power stage is active, and the flow temperature is
below its setpoint. Once the measured temperature is above the setpoint, the delay
will be reset.
● Delay calculation: flow temperature setpoint – measured flow temperature
● Flow temperature setpoint: DHW setpoint + charging difference
The stages are switched off one by one, with the Power decrease delay in between.
The stage that was switched on last will be switched off first.
● Typical setting: 0–2
● Decrease the delay to have the power stages switch off earlier after the flow
temperature exceeds its setpoint.
● If the delay is greater than 0, the heater power stages will remain switched on
even after the flow temperature has exceeded the setpoint. For a more stable
flow temperature, use a setting slightly above zero.
The delay is based on degree minutes, and it applies when the compressor is
running, the electric heater is active, and the flow temperature is above its setpoint.
Once the measured temperature is below the setpoint, the delay will be reset.
● Delay calculation: flow temperature setpoint – measured flow temperature.
● Flow temperature setpoint: DHW setpoint + charging difference
If one of the settings below is selected, the system can switch on the electric heater
when the compressor reaches its operating limits and switches off (or the legionella
function is active). The setting influences DHW heating only.
Freezing protection only
The electric heater will switch on only when DHW tank temperature falls below +5 °C
(freezing protection). Once the temperature in the DHW tank exceeds +10 °C, the
heater will switch off.
● In freezing protection, space heating has priority over domestic hot water
heating.
● If this option is selected, the electric heater won't be switched on during a
fault unless the temperature falls below the Freezing protection limit.
● The highest setpoint for domestic hot water is lower than the setpoints for the
operating modes in which the system can use the heater.
Backup use only
The electric heater will switch on if:
1. DHW tank temperature is below +5 °C (freezing protection).
2. An alarm prevents the compressor from starting (backup operation).
In backup use, space heating has priority over domestic hot water heating. The
highest setpoint for domestic hot water is lower than the setpoints for the operating
modes in which the system can use the heater.
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