Daikin VRV III-S Technical Data Manual page 28

5 Functions
5 - 2 Detailed Explanation of Functions
5 - 2 - 7 Power Proportional Distribution
Pattern 3: Combinations as above
As a combination system, some/many watthour meters can be connected to one iPU for use of some/many units. The precautions and the
relation between the calculated value and the indicated value of watthour meter are the same as those in Pattern 1 and Pattern 2.
• Number of integrating watthour meter with pulse oscillator
As a standard system, one integrating watthour meter with pulse oscillator (abbreviated "Watthour meter" hereafter) is to be provided.
If more then 19 units are connected, the following treatment (two ways) is effective for it:
1) The mounting position of watthour meter is to be changed:
In most cases, if watthour meter mounting position is changed to the main body side (toward near cubicle) of the receiving equipment, the
number of watthour meter can be set within 12 units. If the number of units is increased, theequipment cost will be increased by more than
hundreds of thousands yen.
2) The specification of watthour meter is to be changed, together with use of pulse synthesizer:
In this case, because some/many watthour meters and the to pulse synthesizer are used, the cost goes up. For this reason it is basically not
recommended.However, if more than 19 units is connected by all means, the pulse synthesizer should be used and the specification of watthour
meter should also be different from the standard one. For more detail, you can consult with our Technical Sales Section.
(3) Setting of the period with no electric energy distributing
• For period of electric energy distributing, the usual (continuous) calculating system is normally adopted, but it is also allowed to set the time zone
and days of the week in which no rate calculation is made. For setting, specifying collectively is done, therefore, it is not possible to set the time
zone every each tenant.
• Within the period of no electric energy distributing, the calculation result is 0 kWh. If the electric power is used with the outdoor unit in no-calculation
time zone, the calculation result, by this electric energy rate, is less than the meter reading.
• As an example, the above is used in the following case:
In ordinary regular time, the flat rate (fixed rate) is collected from the tenants, and only in other time, the electric energy distributing is made as an
overtime and holiday rate.
• The no-calculation period can be set by combining the following. (Tenants individual not allowed)
• Optional start to end time (1 min. unit)
• Optional day of the week (Unit of day of the week)
• Reversely, if the optional date (month/day) is specified, the rate can forcibly be calculated with 1-day unit.
Regardless of specifying of no-calculation period, the rate calculation is made. (Tenants individual not allowed)
• Optional date (month/day) with 1-day unit (1 year)
(4) Data Back-Up
• The set data in the dues control unit is not deleted even if the electric power is turned off, because the data is stored in the non-volatile (flash)
memory.
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• VRV Systems • Network Solution
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