Daikin DCM601A51, Технические данные инструкция

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1.3 Explanations of Power Proportional Distribution 43
ED721208 Power Proportional Distribution (PPD)
3
2) Counting the electricity at the stopped condition of the unit
Even if a VRV 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 set temperature), the VRV consumes
energy due to the energy consumption mainly by the crankcase heater in the outdoor unit.
When the iTM is used, the rated power consumption of the crankcase 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 operation, adapting each indoor unit’s capacity.
(Example)
The iTM counts the indoor unit’s operating conditions every 20 seconds.
Since the indoor units send ON/OFF data of the crankcase heater to iTM, it adds one(+1) to the power counter inside
iTM at no operation of the air-conditioner when the crankcase heater is ON.
When this counter reaches 180, it judges that the crankcase 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 mentioned on this section,
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 air-conditioner is not used at all is counted constantly every month.
(However, as this air-conditioning 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 crankcase heater’s power consumption registered,
because the crankcase heater does not actuate when another tenant operates the VRV.)
RXYQ5P
(Crankcase heater's output=50W)
FXFQ80P×2
(Power consumption at no operation=50/2=25W)