Daikin EKHVMYD50ABV1 [13/64] Esign of the water circuit

Daikin EKHVMYD50ABV1 [13/64] Esign of the water circuit
EKHVMRD50+80ABV1 + EKHVMYD50+80ABV1
Daikin Altherma indoor unit
4P404420-1 2015.04
Installation manual
11
5.3. Switch box main components
1. Main PCB
2. Control PCB
3. Inverter PCB
4. QA PCB
5. Filter PCB
6. Multi tenant PCB
7. Digital I/O PCB (optional)
8. Demand PCB (optional)
9. Terminal block X1M
Main terminal block which allows easy connection of eld wiring
for power supply.
10. Terminal block X2M
Field wiring terminal block for high voltage connections.
11. Terminal block X3M
Field wiring terminal block for low voltage connections.
12. DC connector X1Y/X4Y
13. AC connector X3Y
14. Pump connector X2Y
15. Cable tie mountings
The cable tie mountings allow to x the eld wiring with cable
ties to the switch box to ensure strain relief.
16. Power wiring entry
17. High voltage eld wiring entry
18. Low voltage eld wiring entry
19. Compressor cable entry
20. Interface relay K1A
21. Interface relay K2A
22. Interface relay K3A
23. Wiring bridges
6. DESIGN OF THE WATER CIRCUIT
The purpose of this chapter is to give guidelines for the design of the
water circuit.
Precautions and guidelines that have impact to the unit prescribed in
this manual are included into this chapter.
Actions needed during the installation of the unit prescribed in this
manual are described in the chapter "7.6. Water piping" on page 25.
6.1. Selection of the type of heat emitters
The selection of the heat emitter is the choice of the end customer.
The choice of the heat emitter will dene the needed water
temperature from the unit.
For heating mode
Based on the needed water temperature for the heat emitters,
following range can be dened:
1. Low temperature (Leaving water temperature range from 25°C
to 40°C).
Typical example: oor heating.
2. Medium temperature (Leaving water temperature range from
40°C to 55°C).
Typical example: low temperature radiators or convectors.
3. High temperature (Leaving water temperature range from 55°C
to 75°C).
Typical example: radiators.
For cooling mode
Fan coil units are advised as heat emitters.
In a house a combination of the above mentioned heat emitters is
possible.
Once the heat emitters are chosen, the capacity of these heat
emitters should be dened and from this the dimensioning and
position of the heat emitters in the different rooms should be decided.
An important parameter of the heat emitters is the temperature
difference between entering water and leaving water.
This will dene the water ow in the system.
Finally, the piping layout from the heat source to the different heat
emitters needs to be drawn.
This will nally dene following important parameters:
Minimal water volume in the system.
Maximal water volume in the system.
Minimal and maximal water ow in system.
Maximal pressure drop in the system.
8
1
15
7
19
13
14
4
3
5
9
15
62 161718 21 15 10
23
22
11
12
20
WARNING
It is strongly recommended to install an additional lter on
the heating water circuit. Especially to remove metallic
particles from the eld heating piping, it is advised to use a
magnetic or cyclone lter which can remove small
particles. Small particles can damage the unit and will not
be removed by the standard lter of the heat pump unit.
NOTE
If oor cooling is used, it is the responsibility of the
installer to take the needed precautions to avoid
oor sweating.
The draining of the fancoil units are the
responsibility of the installers.
When radiators are used, a shut-off valve must be
installed to avoid sweating of the radiators. (Refer
to "6.3. Application examples for heating only
units" on page 13).

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