28
Items to be Confirmed Before Turning on Unit
Items to be Checked during the Pilot Run
Commissioning and Operation
Note: Before the pilot run, check that the
following conditions are met and read the
"Safety Precautions" again.
Note: The reference standards are used to check whether a unit works properly onsite. Reference standards
are determined based on the maximum and minimum working conditions. If reference standards are exceeds
after the unit has properly worked for a period of time, contact the local dealer or DAIKIN for help.
Check the following items after the unit has worked properly for a period of time:
■ Ensure that the water pump and the unit are connected.
Use the PCB controller to Control the on and off the water pump using the water pump output on the PCB
controller; otherwise the BPHE may burst due to freezing.
The water pump connection point must have no voltage. If a voltage circuit is connected, basic components
may be damaged.
■ Power on the unit to preheat the crankcase for at least 12 hours before starting up the unit for the
first time or after a long-term stoppage. This ensures that the compressor works properly.
■ Before turning on the unit, check that the water pump is filled with water.
Before turning on the water pump, open the water supply valve, fill the pump with water, and
discharge free air in the system.
■ Wiring of the unit: Check that the diameter of the wires meets requirements; the wires are correctly
connected; the grounding line is securely connected;
■ Before turning on the unit, clean the water system and ensure that pipes are clean without
contaminants.
■ Make sure that the working conditions do not exceed the rated working range.
S/N
Item
Checking Method
Reference Standard
1
Power supply voltage
Voltage
Rated voltage±10%
2
Working current of a single compressor
Current
13 - 25A
3
Difference between EWT and LWT of evaporator
Temperature
2 - 7ºC
4
Difference between EWT and LWT of condenser
Temperature
2 - 10ºC
5
Discharge temperature of the compressor
Temperature
40 -115ºC
6
Low pressure during operating
Pressure
6.9 - 10.0bar
7
High pressure during operating
Pressure
13.0 - 29.0bar
