Apportioning Calculation Method Of Outdoor Unit - Mitsubishi Electric G-50A Technical Manual

(4) TG-2000A
By collecting charging information from PLC
and G-50A, the TG-2000A conducts the
apportioning calculation of these data during
AM 4:00 ~ 7:00 once a day. As the electric
power consumption collected from PLC
represents the integrated value, TG-2000A
takes a difference with the electric power
consumption of the previous day and holds the
data converted in the daily power consumption.
On the clearance day, the daily apportioning
data is added and the standing charge is also
added for clearing.

8.4.2 Apportioning calculation method of outdoor unit

The apportioning calculation method when a watt-hour meter is installed on the power source line of
outdoor unit is shown here taking Figure 8-10 as an example.
(1) Decision of outdoor unit apportioning calculation method
The calculation method differs depending on the processing ways of electric power consumed by the
crankcase heater which is the waiting electric power of the outdoor unit. The processing methods
include the mode 1 ~ mode 3 required to be set on TG-2000A.
Mode 1: Apportioning including crankcase heater portion
Mode 2: Apportioning calculating crankcase heater portion separately (Default value)
Mode 3: Apportioning not including crankcase heater portion
Charging time frame 1
Daily total power
consumption
Example) 100kW
(25W × 24 hours) × 2 sets
(2) Decision of apportioning standard data
The apportioning standard data of the indoor units used by each tenant (charge block) can be selected
from the following two methods. (Selection by TG-2000A)
These data are integrated by G-50A for each indoor unit per charging time frame and collected by
TG-2000A once a day.
1 Standard data 1: Capacity saving amount (default) ⇒ Integrates power consumption corresponding
2 Standard data 2: Thermostat ON time
Integrates operating
time for each charging
time frame
52
Charging time frame 1
Daily power
consumption
Example) 97.84kW
For crankcase
heater
Example) 2.16kW
Standard data 1: Capacity saving amount (Operating capacity amount)
Charging time
frame 1
Standard data 2: Thermostat ON time (operating time)
Charging
For 1 day
time
frame 1
For 2 days
Charging
For 3 days
time
frame 2
Charging
time
frame 5
Calculates total
Electric power
electric power
integrated value
consumption in a
collected from
unit of day per
PLC
charging time frame
Mode 1: Apportioning of [Daily total power consumption] (100kW)
Mode 2:
Apportioning of [Daily power consumption] and [Power
consumption by crankcase heater] respectively (97.84 kW and
2.16kW)
Mode 3:
Apportioning of [Daily power consumption] only not including
[Power consumption by crankcase heater] (97.84kW only)
to operating capacity
⇒ Integrates ON time of thermostat
Integrates the power
50% 100%
consumption to meet the
operating capacity in time
unit
Example) 50% ⇒ 0.5 minutes
ON!
Time during [operation]
Charge block
IC2
IC3
IC1
IC2 IC3
IC1
IC1
IC3
IC2
Apportions daily total power
consumption by indoor unit operation.
On clearance day, the standing
charge is added by summing up each
charge block in total.