Daikin HXHD125A7V1B, Руководство по установке

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HXHD125A7V1B
VRVIII system indoor unit
4PW62584-1A – 11.2010
Installation manual
7
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 field 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 fix the field wiring
with cable ties to the switch box to ensure strain
relief.
16 Power wiring entry
17 High voltage field wiring entry
18 Low voltage field wiring entry
19 Compressor cable entry
20 Interface relay K1A
21 Interface relay K2A
22 Interface relay K3A
23 Wiring bridges
6. D
ESIGN 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 16 .
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 define the needed water
temperature from the unit.
Based on the needed water temperature for the heat emitters,
following range can be defined:
1. Low temperature (Leaving water temperature range from 25°C
to 40°C).
Typical example: floor 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.
Once the heat emitters are chosen, the capacity of these heat
emitters should be defined 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 define the water flow in the system.
Finally, the piping layout from the heat source to the different heat
emitters needs to be drawn.
This will finally define following important parameters:
■
Minimal water volume in the system.
■
Maximal water volume in the system.
■
Minimal and maximal water flow in system.
■
Maximal pressure drop in the system.
8
1
15
7
19
13
14
4
3
5
9
15 6 2 16 17 18 21 15 10
23
22
11
12
20
NOTICE
It is strongly recommended to install an additional filter on
the heating water circuit. Especially to remove metallic
particles from the field heating piping, it is advised to use a
magnetic or cyclone filter which can remove small
particles. Small particles can damage the unit and will not
be removed by the standard filter of the heat pump unit.
NOTICE
In refurbishment applications, the water system will
already be fixed. It is utmost important for these kind of
installations to know the parameters mentioned above.