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5.2.10. Manual defrost
23
.
Frost may form on the plate heat exchanger during normal operations in heating
mode, see Figure 1. Frost on the plate heat exchanger reduces heat pump
performance. Frost is formed during heating mode because the heat pump cools
surrounding ambient air to heat water. SERIES BP pumps are equipped with a
temperature sensor that detects frost on the plate heat exchanger and starts
automatic defrost. However, if this is insufficient, manual defrost can be started.
Manual defrost can only be started when the heat pump is running in heating
mode.
When the pump is running, see Paragraph 5.2.4, press and hold down for 5
seconds to turn on manual defrost. Manual defrost lasts several minutes. At the
end of the manual defrost cycle, the heat pump automatically starts.
When defrosting, refrigerant fluid pressure is increased to make refrigerant fluid
hotter so that it heats the plate heat exchanger during circulation to defrost.
When defrosting, refrigerant fluid pressure significantly increases. For further
information, see Paragraph 5.3.
The heating mode icon blinks during defrost. See Figure 18.
Figure 18: Manual defrost.
5.2.11. Key lock.
Keys can be locked to prevent accidental regulations.
To lock keys, press and simultaneously hold down keys and for 5 seconds.
Symbol will appear on the display. See Figure 19 and Figure 20.
Figure 19: Key lock, heating mode.
Figure 20: Key lock, cooling mode.
5.2.12. Sensor temperature display.
SERIES BP heat pumps are equipped with 4 temperature sensors that
continuously read pool water, ambient
24
, compressor and plate heat exchanger
temperatures
25
.
23
Operating mode not included in model BP-xxWS-B (xx=35, 50).
24
Not included in model BP-xxWS-B (xx=35, 50) where the sensor is not installed.
25
Not included in model BP-xxWS-B (xx=35, 50) where the sensor is not installed.
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