Daikin RWEYQ72, Engineeiring Data

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EDUS30-900-N Installation
Installation of Outdoor Units 39
[Setting the interlock circuit and pump operation
output.]

Pump operation output [high voltage]

• Use insulated wires of the size as mentioned below having rated
voltage of 250 V or more:
For single core: AWG16 or larger (conduit pipe work)
For multiple cores: AWG18 or larger
*The wiring for pump operation output is to be procured locally.
(Refer to figure 12)
1.
Pump operation output terminal (X2M).
When water pump is linked with system operation, water
pump operation circuit shall be set between terminals (1)
and (2).
Contact specification --- 220 VAC, 3mA-0.5A
2.
PC board (A1P)
3.
Mount an insulation sleeve.
4.
Connection of interlock circuit
Do not forget to connect an interlock circuit (an auxiliary
a-contact of electromagnetic switch for the water pump)
to each outside unit.
(Select without fail an auxiliary a-contact able to switch
minimum load of DC15V, 1mA.)

When connecting for each outside unit

Connect to the terminal block (X3M) as shown in the bot-
tom right of the sketch.

When connecting multiple outside units as 1 single unit
(centralized interlock)

For this unit, it is possible to make a centralized interlock
of multiple outside units using an adapter (sold separately
as an accessory) for external control of outside units.
For details of wiring connection, refer to “
How to central-
ized interlock wiring ”.

How to the centralized interlock wiring

• When centralized interlock is done, see “ 8-5 In case of a local
setting
” -(3)
• No wiring to terminal block X3M is necessary when centralized
interlock is employed
• For multiple outside units, external/external connection wiring
shall be done for master unit only.
(Refer to figure 13)
1.
Outside unit A
2.
Outside unit B
3.
Outside unit C
4.
Adapter for external control
5.
Interlock circuit of water pump
6.
Out-Out connection wiring
7.
Use the conductor of sheathed wire (2 wire)(no polarity)
[Setting the cool/heat operation type]
1.
Performing cool/heat setting with the remote controller con-
nected to the indoor unit.
Keep the COOL/HEAT selector switch (DS1) on the outside
unit PC board (A1P) at the factory setting position OFF.
(Refer to figure 16)
1.
Remote controller
2.
Performing cool/heat setting with the COOL/HEAT selector.
Connect the COOL/HEAT selector (optional) to the A/B/C ter-
minals and set the COOL/HEAT selector switch (DS1) on the
outside unit PC board (A1P) to ON.
(Refer to figure 17)
1.
COOL/HEAT selector
• The wiring from the indoor units must be connected to the F1/F2
(In-Out) terminals on the PC board in the outdoor unit.
• For the above wiring, always use sheathed vinyl cords with
AWG18-16 sheath or cables (2 core wires). (3 core wire are allow-
able for the COOL/HEAT selector only.)
NOTE
• All transmission wire is field supply.
• Be sure to follow the limits below. If the transmission wiring is
beyond these limits, it may result in malfunction of transmission.
Maximum wiring length:
3280 ft.
Total wiring length: 6560 ft.
Max. branches No. of branches: 16
Wire length between outside units:98 ft.
Up to 16 branches are possible for transmission wiring. No branch-
ing is allowed after branching.
Never connect the power supply to transmission wiring terminal
block. Otherwise the entire system may break down.
(Refer to figure 14)
1.
Branch
2.
Subbranching
For low-noise operation, it is necessary to get the optional “Exter-
nal control adaptor for outdoor unit”.
For details, see the installation manual attached to the adaptor.
Field line connection:
L1, L2, L3, phase of the power supply wiring should be clamped to the
safety catch using the included clamp material.
The green and yellow striped wrapped wires should be used for
grounding.
Make sure to connect the power wire to the power terminal block and
fix it using attached clamp as shown in figure 15 and 19.
(Refer to figure 15)
1.
Power supply
(208-230V, Three-phase)
2.
Branch switch, overcurrent breaker
3.
Grounding wire
4.
Ground fault circuit interrupter
5.
Attach insulation sleeves.
6.
Power supply terminal block
7.
Grounding terminal
8.
Retain the ground wires along with the power wires using
the accessory clamp (A).
9.
Grounding wire
10.
When wiring, do not allow the ground wires to contact the
compressor lead wires. If the wires contact each other,
adverse effects may occur to other units.
11.
When connecting two wires to one terminal, ensure that
the crimp-style terminals face with each other back to
back.
Moreover, make sure that the wire of the smaller gauge is
located above.
12.
Terminal block
13.
Crimp-style terminal
14.
Wire gauge: Small
15.
Wire gauge: Large
(Refer to figure 19)
1.
Intake for power supply wiring, pump operation output
(high voltage) and ground wiring.
2.
Stop valve for discharge gas (high temperature part)
3.
Insert the accessory clamp (B) in the hole of the fixing
plate for stop valve.
4.
Power supply wiring, pump operation output (high volt-
age) and ground wiring.
5.
Retain the power supply wiring, pump operation output
(high voltage) and ground wiring with the accessory
clamp (B) to prevent them from touching with the stop
valve for discharge gas.
6.
Insert the accessory clamp (B) in the hole of the bottom of
electrical box.
7.
Intake for transmission wiring. (low voltage)
8.
Make sure to provide for a downward loop in the trans-
mission wiring right in front of the location where the wir-
ing is to be fixed over the topplate of the switch box. This
in order to prevent that condensate drips off the wiring
into the switch box.
9.
Fix the transmission wiring to resin clamps with the
accessory clamps (A)
10.
Pass the transmission wiring (low voltage) through the
wire clip.
11.
Retain the power supply wiring, pump operation output
(high voltage) and ground wiring to the bottom of electri-
cal box with the accessory clamp (B)