Daikin EBHQ011BA6V3, Installation Manual

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E(D/B)(H/L)Q011~0W1
Unit for air to water heat pump system
4PW57621-1A
Installation manual
14
13. X9A socket
The X9A socket receives the thermistor connector (only for
installations with domestic hot water tank).
14. Pump fuse FU2 (in line fuse)
15. Pump relay K4M
16. Transformer TR1 for PCB power supply
17. A4P digital I/O PCB (only for installations with solar kit or digital
I/O PCB)
18. Conduit hole to pass through the booster heater power supply
cable.
19. Conduit hole to pass through the booster heater power supply
cable and the thermal protection cable.
20. Conduit hole to pass through the room thermostat cable and
2-way valve and 3-way valve control cables.
21. Conduit hole to pass through the thermistor cable and user
interface cable (and benefit kWh rate cable).
22. Conduit hole to pass through the backup heater power supply
wiring.
23. Conduit hole to pass through optional I/O PCB connection
wiring.
24. K7A relay for solar pump (optional)
This relay and its output on X2M can be activated when the solar
input on A4P becomes active.
25. Terminal for expansion vessel heater and, only for EDL and EBL
units, plate heat exchanger heater and switch box heater.
Water pipework
All piping lengths and distances have been taken into consideration.
Checking the water circuit
The units are equipped with a water inlet and water outlet for
connection to a water circuit. This circuit must be provided by a
licensed technician and must comply with local laws and regulations.
Before continuing the installation of the unit, check the following
points:
■
The maximum water pressure = 3 bar + static pressure of pump.
■
The maximum water temperature is 65°C according to safety
device setting.
■
Always use materials which are compatible with the water used
in the system and with the materials used in the unit.
■
Take care that the components installed in the field piping can
withstand the water pressure and temperature.
■
Drain taps must be provided at all low points of the system to
permit complete drainage of the circuit during maintenance.
A drain valve is provided in the unit to drain the water from the
unit water system.
■
Air vents must be provided at all high points of the system. The
vents should be located at points which are easily accessible for
servicing. An automatic air purge is provided inside the unit.
Check that this air purge valve is not tightened too much so that
automatic release of air in the water circuit remains possible.
■
Select piping diameter in relation to required water flow and
available ESP of the pump.
■
The minimum required water flow for the unit operation is
16 l/min. When the water flow is lower than this minimum value,
flow error
7H
will be displayed and the operation of the indoor
unit will be stopped.
Checking the water volume and expansion vessel
pre-pressure
The unit is equipped with an expansion vessel of 10 litre which has a
default pre-pressure of 1 bar.
To assure proper operation of the unit, the pre-pressure of the
expansion vessel might need to be adjusted and the minimum and
maximum water volume must be checked.
1 Check that the total water volume in the installation, excluding
the internal water volume of the unit, is 20 l minimum. Refer to
"Technical specifications" on page 43 to know the internal water
volume of the unit.
NOTE
The electrical wiring diagram can be found on the
inside of the switch box cover.
Requirement Value
Maximum allowable distance between the domestic hot
water tank and the unit (only for installations with domestic
hot water tank). The thermistor cable supplied with the
domestic hot water tank is 12 m in length.
In order to optimise efficiency Daikin recommends to install
the 3-way valve and the domestic hot water tank as close
as possible to the unit.
10 m
NOTE If the installation is equipped with a domestic hot water
tank (optional), please refer to the domestic hot water
tank installation manual.
The unit is only to be used in a closed water system.
Application in an open water circuit can lead to excessive
corrosion of the water piping.
In most applications this minimum water volume will have a
satisfying result.
In critical processes or in rooms with a high heat load
though, extra water volume might be required.