INSTALLATION MANUAL - Daikin AC

6 Internal wiring
Visually check the switch box on loose connections or damaged
electrical components.
7 Fixation
Check that the unit is properly fixed, to avoid abnormal noises
and vibrations when starting up the unit.
8 Damaged equipment
Check the inside of the unit on damaged components or
squeezed pipes.
9 Refrigerant leak
Check the inside of the unit on refrigerant leakage. If there is a
refrigerant leak, call your local dealer.
10 Power supply voltage
Check the power supply voltage on the local supply panel. The
voltage must correspond to the voltage on the identification label
of the unit.
11 Air purge valve
Make sure the air purge valve is open (at least 2 turns).
12 Pressure relief valve
Check if the backup heater is completely filled with water by
operating the pressure relief valve. It should purge water instead
of air.
NOTE
Operating the system with the backup heater not
completely filled with water will damage the backup
heater!
13 Shut-off valves
Make sure that the shut-off valves are correctly installed and
fully open.
NOTE
Operating the system with closed valves will damage
the pump!
Powering up the indoor unit
When power supply to the indoor unit is turned on, "88" is displayed
on the user interface during its initialisation, which might take up to
30 seconds. During this process the user interface cannot be
operated.
Setting the pump speed
The pump speed can be selected on the pump (see "Main
components" on page 10).
The default setting is high speed (I). If the water flow in the system is
too high (e.g., noise of running water in the installation) the speed
can be set to medium speed (II) or low speed (III).
The available external static pressure (ESP, expressed in psi (kPa)) in
function of the water flow (gallons/min (l/min)) is shown in the graph
below.
ESP [psi]
ESP [kPa]
13
12
11
10
9
8
7
6
5
4
3
2
1
0
4 6 8 10 12 14 16 18
III
[gallons/min]
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58
[l/min]
III
II
I
I I II
II
Installation manual
24
EKHBH/X054BA
Indoor unit for air to water heat pump system
4PW54216-1