Daikin VRV III-S Technical Data Manual page 40

10 Explanations of Power Proportional Distribution
10 - 1 What is the Power Proportional Distribution.
2) Calculation of the proportional division value for a daily power consumption.
The proportional division value for a dairy power consumption is stored with factors of each indoor unit's
number and a calendar date as a table shown below after adding the count result of hourly power
consumption from 00:00 through 23:59. (with a graduation of 10 W)
Indoor unit No.
001
Date
000150
April 1st
002004
April 2nd
000313
April 3rd
3) Counting the electricity at the ceased condition of the unit
Even if an airconditioner is stopped or in the condition of thermostat -off ( the condition that the compressors are stopped as the temperature in the
space where all the indoor units are installed falls down to the preset temperature), the airconditioner consumes energy due to the energy consumption
mainly by the crank-case heater in the outdoor unit.
When the iPU is used, the rated power consumption of the crank-case heater is divided by the number of indoor units in usual connection (for instance
two indoor units of 2.5 HP are connected to an outdoor unit of 5 HP etc. ) and the value is registered at the test run ,adapting each indoor unit's capacity.
(Example)
RXYQ5P
(Crank-case heater's output=50W)
The iPU counts the indoor unit's operating conditions every 20 seconds.
Since the indoor units send ON/OFF data of the crank-case heater the to iPU, it adds one(+1) to the power counter inside iPU at no operation of the
airconditioner when the crank-case heater is ON.
When this counter reaches 180, it judges that the crank-case heater was on for one hour, and in case of the above mentioned indoor unit, the counter
goes back to zero after 25 Wh is added to the counting result .
This calculation process is conducted separately from the proportional division computation and this input is got rid of from the pulse input of the
watthour meter. Because of this procedure, the power consumption in the space where the airconditioner is not used at all is counted constantly every
month.
(However, as this airconditioning system is a multi-system, in case that one outdoor unit is shared to another tenant, the count output can be seen in
lower value rather than the crank-case heater's power consumption registered, because the crank-case heater doesn't actuate when another tenant
operates the airconditioner.)
•
002 003
000211 000741
005202 009205
001103 000086
FXFQ80P
(Power consumption at no operation=50/2=25W)
• VRV Systems • Network Solution
The set data in the dues control unit is not
004
deleted even if the electric power is turned
off, because the data is stored in the non-
004402
005902 volatile (flash) memory.
008173
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