Wiring Connection Example For Whole System; Leading Wire Procedure; Transmission Wiring Connection Procedure - Daikin VRV III Series Installation Manual

• Heat Recovery series (RQCEQ)
RQCEQ280=RQEQ140+RQEQ140
RQCEQ360=RQEQ180+RQEQ180
RQCEQ460=RQEQ140+RQEQ140+RQEQ180
RQCEQ500=RQEQ140+RQEQ180+RQEQ180
RQCEQ540=RQEQ180+RQEQ180+RQEQ180
RQCEQ636=RQEQ212+RQEQ212+RQEQ212
RQCEQ712=RQEQ140+RQEQ180+RQEQ180+RQEQ212 No requirements
RQCEQ744=RQEQ140+RQEQ180+RQEQ212+RQEQ212 No requirements
RQCEQ816=RQEQ180+RQEQ212+RQEQ212+RQEQ212 No requirements
RQCEQ848=RQEQ212+RQEQ212+RQEQ212+RQEQ212 No requirements
7-2 Wiring Connection Example for Whole
System
• Heat Pump series (RQ(C)YQ)
(Refer to figure 19.1)
1. Power supply
2. Main switch
3. Earth leakage circuit breaker
4. Fuse
5. Outdoor unit
6. COOL/HEAT selector
7. Remote controller
8. Indoor unit
• Heat Recovery series (RQCEQ)
(Refer to figure 19.2)
1. Power supply
2. Main switch
3. Earth leakage circuit breaker
4. Fuse
5. Outdoor unit
6. COOL/HEAT selector
7. Remote controller
8. Indoor unit
9. BS unit
Note
• Make sure the weak electric wiring (i.e. for the remote control-
ler, between units, etc.) and the power wiring do not pass near
each other, keeping them at least 50 mm apart.
Proximity may cause electrical interference, malfunctions, and
breakage.
• Be sure to connect the power wiring to the power wiring termi-
nal block and secure it as described in "7-5 Power Wiring
Connection Procedure".
• Transmission wiring should be secured as described in "7-4

Transmission Wiring Connection Procedure".

• Secure wiring with clamp such as insulation lock ties to avoid
contact with piping.
• Shape the wires to prevent the structure such as the EL.
COMPO. BOX lid deforming. And close the cover firmly.

7-3 Leading wire Procedure

• The power wiring and ground wiring are passed out from the
power wiring hole on the sides, the front (knock hole) or the bot-
tom frame (knock hole) .
• The transmission wiring is passed out from the wiring hole (knock
hole) on the front of the unit or from a piping hole.
(Refer to figure 20)
1. Electrical wiring diagram
2. On the back of the EL .COMPO. BOX lid.
3. Power wiring, ground wiring (inside conduit)
4. (When the wiring is routed out through the side panel.)
5. Transmission wiring
6. Pipe opening
7. Conduit
8. For power wiring and ground wiring
9. Through cover
10. Cut off the shaded zones before use.
11. Burr
12. Knockout hole
13. For transmission wiring
Note
• Open the knock holes with a hammer or the like.
• After knocking out the holes, we recommend you remove any
burrs and paint them using the repair paint to prevent rusting.
• When passing wiring through the knock holes, remove burrs
around the knock holes and protect the wiring with protective
tape. (Refer to figure 20)
English
• If small animals might enter the unit, block off any gaps (hatching
Minimum
Z (Ω)
max
S value
7-4 Transmission Wiring Connection Procedure
sc
No requirements 1813804
• Referring to figure 21, 22 connect the transmission wiring
No requirements 2359468
No requirements 2993538
No requirements 3266370
No requirements 3539202
No requirements 3422187
4407099
4368094
4601921
4562916
• All transmission wiring is to be procured onsite. All wiring should
• Transmission wiring (About the symbol
• The transmission wiring inside the EL.COMPO.BOX should be
parts in figure 20) with material (field supply).
between outdoor unit and indoor unit, outdoor unit and outdoor
unit of other system, outdoor unit and outdoor unit of same sys-
tem (only multi system) or to COOL/HEAT selector.
• Heat Pump series (RQ(C)YQ)
(Refer to figure 21.1)
1. Connection example for single system
2. Outdoor unit
3. COOL/HEAT selector
4. To outdoor unit of other system
5. Match up terminal symbols. (Has polarity)
6. Use duplex wires
7. Indoor unit
8. Never connect the power wire
• Heat Recovery series (RQCEQ)
(Refer to figure 21.2)
1. EL. COMPO. BOX
2. Never connect the power wire.
3. To outdoor unit of other system
4. Use duplex wires (No polarity)
5. BS unit
6. Indoor unit
7. Indoor unit (Cooling only)
(Refer to figure 22)
1. Connection example for multi system
2. Outdoor unit A (Master unit)
3. Outdoor unit B (Sub unit)
4. COOL/HEAT selector
5. To indoor unit
6. To outdoor unit of other system
use sheathed vinyl cord 0.75-1.25 mm
only for the COOL/HEAT selector.)
should be done within the following limitations.
If they are exceeded, transmission problems may occur.
Between outdoor unit and indoor unit
1
Between outdoor unit and outdoor unit of other systems
Max. wiring length
Max. total wiring length
Max. no. of branches
Max. no. of outdoor units of other system
that can be connected
(Refer to figure 23)
1. Outdoor unit
2. Indoor unit
3. Branch line 1
4. Branch line 2
5. No branch is allowed after branch
6. Main line
7. Central remote controller, etc.
8. Branch line 3
9. Transmission wiring between outdoor unit and indoor unit
10. Transmission wiring between outdoor unit and outdoor unit
Between outdoor unit and outdoor unit of same system
2
(Only for multi system)
Max. wiring length
Transmission wiring to COOL/HEAT selector
3
Max. wiring length
secured using the clamp (2) as shown in figure 24.
(Refer to figure 24)
1. In the EL.COMPO.BOX
2. Retain to the EL.COMPO.BOX with the accessory clamp
(2).
2
or cable (duplex). (Triplex
~ , see figure 21, 22)
3
1
: 1,000 m
: 2,000 m
: 16
[Note]
No branch is allowed
after branch
(See figure 23)
: 10
: 30 m
: 500 m
16