User Manual
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17
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’10 • SC-T-154
(c) Reset switch
There is a switch to reset the power supply when the screen freezes.
Data is never deleted with this switch.
This central control will be reset in about 1 second.
Note
Please peel off the protection sheet of the screen when you pass the central control to
the customers.Before you mount the upper case, please peel off the sheet.
Operating method
Please push the button which is the inner part of the small hole of the underside of the
upper case using the clip which is extended straight or the tool which is similar to that.
(d) Other information
• This central control is electronic and independently mounted control.
• The type of this central control is automatic action for which the manufacturing deviation and the drift of its operating value,
operating time or operating sequence have not been declared, and tested under the standard.
• The actions of this central control are full-disconnection on operation, a trip-free mechanism which cannot even momentarily
be reclosed against the fault, an action which can only be reset by the use of a tool, and an action that does not require any
external auxiliary energy source of electrical supply for its intended operation.
• The rated impulse voltage (impulse withstand voltage) is 2500V.
• The surface of touch panel and front cover produce an increase of temperature of about 15 degrees.
• The lifetime of the keying of touch panel is one million times. The lifetime of LCD is about 20,000 hours. (The brightness will
become half of the starting value.)
(10) About the accounting calculation
(a) Selection
following items.
(b) Selecting the pulse unit
2) Selecting the pulse unit
①
Calculate the total of power supply capacity required for the air-conditioners to be connected.
②
③
Maximum operating status of air-conditioner: Estimated overload condition expected in the summer season, for example:
If it is assumed to be the total power consumption
@
1.2;
Example) Provided the total power consumption status = 100 kW and the power factor = 90%
If max. operating status = 100
@
1.2 = 120 kW, 3-phase, 200 V
I = 120
@
1,000/(1.732
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200
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0.9) = 385A
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The watt-hour meter needs to have a capacity of 400 A.
If we select an oscillation device from Mitsubishi’s products of 400 A:
• K11 type – Select the pulse unit 100 kWh/P or 10 kWh/P
• K12 type – Select the pulse unit 100 kWh/P or 10 kWh/P or 1 kWh/P
* For a further small pulse unit, consult a watt-hour meter manufacturer.
④
Check for when the power consumption is 120 kWh (Example)
c
If 0.1 kWh/P is selected when the pulse input is the largest: 1,200 P/h = 20 P/min, which means it is 20 pulses/min, and
so this is acceptable.
c
If the duty cycle decreases to 1/10 (12 kWh), for example; If 10 kWh/P is selected, 1.2 P/h = 0.02 P/min, which means
that there is no pulse within 10 minutes. It becomes 28.8 pulses for a day. If 1 kWh/P is selected, it is 12 P/h = 0.2 P/
min, which means that there are 2 pulses/10 minutes.
1 pulse a day, it is possible to use 10 kWh/P. However, since it is likely
to produce calculation errors depending on the duty cycle, it is better to use 1 kWh/P.
1) Restrictions on the pulse input receiving side
After checking the wiring and doing reset switch operation, when the screen is not displayed, please contact the shop where the
central control was purchased. This product consists of the exclusive parts, and you can not exchange the electrical equipment.
Please do not disassemble other than this instruction manual stating.