1.2 Design Precautions
259
Power Proportional Distribution (P.P.D.)
1.2.3 The Reason why VRV Heat Recovery must not be Included
For Heat Recovery outdoor units, the watthour meter must be independently installed.
(1) For heat recovery, there is a case that the power consumption is less than VRV and VRV Plus.
(2) However, if different systems are put on the one meter, the electric power distribution would be calculated by constant
counting, and the calculation result would then more than the actual value on all indoor units.
Therefore, it is necessary to install the watthour meter independently as shown in Fig. 2.
In addition, the power port No. in Address Table must be different from others. (To be set at test run)
Fig.1 Not Recommended : Watthour meter is shared.
Fig.2 Recommended : Heat Recovery and other system watthour meter are separated.
Caution:
It is possible to register to the same electric power group for the following combination.
1. VRV,VRVII (R-22)
2. VRV Heat Recovery (R-22)
3. VRVII,VRVIII (R-410A)
4. VRVII Heat Recovery (R-410A)
When the combination of the above-mentioneds is not observed, a correct power proportional distribution calculation
cannot be done.
kWh meter with pulse output
Not allowed with 1 unit !
WHM
Power source
three-phase
Electric energy
pulse signal line
VRV
Plus
Heat
Recovery
iPU
WHM
WHM
Power source
three-phase
Electric
energy
pulse
signal line
iPU
VRV
Plus
Heat
Recovery
kWh meter with pulse output
Содержание D-BACS
Страница 1: ...ED 72 721 Preliminary Daikin Buildings Air conditioning Control System D BACS DESIGN GUIDE ...
Страница 17: ...xvi 1 5 Open Network Glossary Introduction ...
Страница 41: ...24 Outline of D BACS System ...
Страница 74: ...57 Remote Controllers HRV Wired remote controller BRC301B61 VAM ...
Страница 88: ...3 6 Wired Remote Controller with Weekly Schedule Timer BRC1D61 71 Remote Controllers 3P107422 3D ...
Страница 102: ...5 2 Wireless Remote Controller BRC4C 7C 7E 85 Remote Controllers 5 2 Wireless Remote Controller BRC4C 7C 7E ...
Страница 103: ...86 5 3 Simplified Remote Controller BRC2C51 BRC2A51 Remote Controllers 5 3 Simplified Remote Controller BRC2C51 BRC2A51 ...
Страница 107: ...90 5 4 HRV BRC301B61 Remote Controllers ...
Страница 142: ...1 2 System Configuration 125 Control Devices 1 2 System Configuration System Outline ...
Страница 181: ...164 3 8 Error Diagnosing Function Control Devices ...
Страница 215: ...198 3 8 Wiring Example intelligent Manager ...
Страница 235: ...218 Interface for Use in BACnet ...
Страница 249: ...232 7 1 Node Objects Interface for use in LONWORKS 7 Object Details 7 1 Node Objects 7 2 DIII NET Common Objects ...
Страница 253: ...236 Interface for use in LONWORKS 10 Reference Materials Error Code Conversion Table ...
Страница 268: ...251 Interface for use in LONWORKS 13 Workflow ...
Страница 285: ...268 1 6 Notes Power Proportional Distribution P P D ...
Страница 319: ...302 1 5 Dio Unit DEC102A51 Adaptor 1 5 2 Part Names and Functions 1 Appearance Dio Unit DEC102A51 ...
Страница 329: ...312 1 6 Di Unit DEC101A51 Adaptor 1 6 2 Part Names and Functions 1 Appearance Di Unit DEC101A51 ...