Mitsubishi Electric AE-200A Instruction Book page 29

5-5-5. Notes on using the apportioned electricity billing function
• This function is our original electric energy apportionment system that apportions electric energy using
input from electricity meters with a pulse generator function. Rather than directly measuring the electric
energy consumed by each air conditioner, pulses are input based on the air conditioner usage by
determining the air conditioner operating status from the content of its communication with the indoor and
outdoor units.
To all users (user license agreement)
The information provided here constitutes an agreement between Mitsubishi Electric and the
customer.
If this "apportioned electricity billing function for the AE-200 air conditioning control system" is used,
this agreement assumes that the customer is using the aforementioned system having agreed to the
terms listed below.
• Mitsubishi Electric and its sales companies accept no liability whatsoever for any incidental,
consequential or special damages incurred by the customer, even where the sales company has
received notification of the potential for damages of that kind.
Nor is any liability accepted for any allegations regarding the rights of a third party.
Important
Any individual agreement between the building owner and a tenant regarding the use of this product
should incorporate the parties' agreement to or accord with the fact that "charges for the use of air
conditioning will be collected in the form of apportioned totals based on the operating status of air
conditioners (including temporary measures to deal with faults)".
• This is a system for estimating the operating electric energy consumed for air conditioning. As
such it cannot be used as a proof of transaction.
Also, amounts metered using electricity meters are also counted using pulse conversion and
cannot be used as a proof of transaction.
• This is not a system (or its equivalent) in which the operating electric energy consumed by each air
conditioner is directly measured at the location where the electricity is supplied.
• Because this is an apportionment method that uses the operating status of air conditioner indoor units,
even where the operating time for indoor units is the same, the amount of operating electric energy
consumed may differ depending on the model configuration and operating status of the outdoor units.
(The apportioned electric energy may be different when compared with a situation where an electricity
meter is assigned to each air conditioner.)
• Air conditioners still receive current even when stopped, and electric energy is apportioned to idle air
conditioners as standby electric energy.
• While the amounts of electric energy, water and gas consumed are obtained through pulse
conversion, factors such as performance and accuracy are dependent on the metering devices and
Mitsubishi Electric is in no way responsible for such factors.
• If electric power to the AE-200/AE-50/EW-50 and PI controller is interrupted due to a power outage but the
air conditioner is still running, electric energy cannot be apportioned correctly.
• Because the unit price digits for each tenant (energy management block) are rounded off in the charge
calculation process, the figures may differ from the total electric energy charges.
• Adjust the time in the following method as there are discrepancies in the results of apportionment
processing when there is a time lag.
When there is no connection to BACnet
management system, perform periodic time adjustment on the AE-200's LCD. (Even if time is adjusted
with AE-50/EW-50, it is overwritten with the time of AE-200.)
To perform date and time synchronization from the building management system with connection to
®
BACnet , set the "Time Master/Sub" setting to "Sub" on the AE-200 for billing function. The "Time Master/
Sub" setting can be made on the Initial Setting Tool, Web Browser for Initial Settings, or AE-200/AE-50's
LCD. (Refer to the AE-200/AE-50/EW-50 Instruction Book (Initial Settings) for settings methods.)
• Mitsubishi Electric accepts no liability for the incorrect apportionment of electric energy due to problems
such as power outages or equipment faults.
WT07919X04
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or when time synchronization is not carried out from the building
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