Startup & Running & Maintenance; Preparing For First Start Up; Operating Characteristics; Compressor Start Up Delay - Haier AU082FYCRA(HW) Service Manual

18. Startup & Running & Maintenance
a)Preparing for first start up
Restarting after shutting down for long periods
The Heat pump must be started up for the first time by the Technical Service. Before starting up the Heat pumps,
make sure that:
-All safety conditions have been respected.
-The Heat pump system is adequately fixed to the surface it rests on.
-Functional distances have been respected.
-Hydraulic connections have been carried out as indicated in the manual.
-The water circuit is filled and vented. When draining after heat pump operation, take care as the water may be hot.
-The water circuit valves are open.
-Electrical connections have been carried out correctly.
-Voltage is within a tolerance of 10% of the rated voltage for the unit.
-The unit is correctly earthed.
-All electrical and hydraulic connections are tight and have been completed correctly.
b)Operating characteristics
Set point in cooling mode
(factory set) = 12°C, Hysteresis = 5°C.
The compressor starts with water temperatures above 12°C.
The compressor shuts down with water temperatures of less than 7°C.
Set point in heating mode
(factory set) = 45°C, Hysteresis = 5°C.
The compressor starts with water temperatures below 45°C.
The compressor shuts down with water temperatures above 50°C.
In the event of a temporary power failure, when power returns, the mode set previously will be retained in the
memory.

Compressor start up delay

Two functions prevent the compressor from starting up too frequently
- Minimum time since last start-up 300 seconds.
Pump
The electronic board includes a pump control output. The pump starts when the assembly is powered up and at
least 60 seconds before the compressor starts up and stops 60 seconds after the assembly shuts down. After the
first 60 seconds of pump operation when the water flow is at full speed, the water flow alarm functions are activated
(differential pressure switch and pressure difference switch). With a pump connected to terminals Pump on the
installer terminal board.
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