Bms Connection - Hitachi RCUE40AG1 Installation, Operation And Maintenance Instructions

INSTALLATION
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6.6. BMS CONNECTION

6.6.1. SYSTEM
BMS connection is available by using HARC70-CE1,
optional BMS interface unit.
Upper Monitoring Devide
LonWorks
HARC70-CE1
H-Link
Chiller 1 Chiller 2
One interface HARC70-CE1 can connect up to 4
Chillers from a remote place using H-Link connection
(Hitachi communications protocol).
Protocol used by HARC70-CE1 is LonWorks. Physical
channel connection with interface is FTT-10A.
6.6.2. SIGNAL
ON/OFF Chiller
Control
Outlet Water Setting
Operation
ON/OFF
Chilled Water Outlet
Setting
Chilled Water Outlet
State
Temp.
Monitoring
Chilled Inlet Water Temp.
Alarm Codes
Operation status
6.6.3. CAUTION ON USE HARC70-CE1
Please use it correctly according to the following
"CAUTION ON USE."
As for the following:
! "HARC" indicate " HARC70-CE1"
! "Monitoring Device " indicate " upper connecting
device for supervise ", and
! "Control Panel" indicate "Control panel of Chiller unit".
! "SNVT" Indicate "Standard Network Variables Types"
1.Install HARC in a grounded metal box.
2.Install a short circuit breaker in the power supply of
HARC.
3.The transmission line between HARC and Chiller unit
2
should be "0.75mm twisted-Pair cable". If it is not
used, then it cannot communicate between HARC
and Chiller unit, and it does not work properly.
.
3. After an abnormal transmitting occurs between
HARC and Chiller unit, and Chiller unit stops, in the
case of operation starting by the hand operation,
then once turn off Chiller unit's power supply, and
turn on the power supply. If it isn't carried out, then
Chiller unit keeps the condition of transmission
alarm.
Chiller 3 Chiller 4
4. After an abnormal transmitting occurs between
HARC and Chiller unit, and Chiller unit stops, in the
case of operation starting by Monitoring Device,
then transmit an operation order after you transmit a
stop order once. If it isn't carried out, it can't start.
6. After Chiller unit, under control by HARC, is stopped
by the control panel, and operation is done from the
Monitoring Device, then transmit an operation order
after you transmit a stop order once. If it isn't carried
out, it can't start.
7. Don't set the setting temperature to Chiller unit,
under control by HARC, by the control panel. If it is
done the, setting temperature is changed. And, as
for the setting temperature, which changed in this
case, transmit to Monitoring device.
8. After the setting temperature is changed by
Monitoring Device, in the case of turned off Chiller
unit's power supply, set the setting temperature by
Monitoring device again. If it isn't carried out, then
the setting temperature becomes to the temperature
by setting control panel.
9. If power failure occurs in Chiller unit, under control
by HARC, it may not revert to the condition before
the power failure. Try to detect that the operation
condition of Chiller unit changed, by the Monitoring
Device. If Chiller unit stopped due to the power
failure, then transmit an operation order from the
Monitoring Device after the power supply
restoration. And, transmit the setting temperature,
mode from the Monitoring device. If it isn't carried
out, and then Chiller unit is stopping, and the setting
temperature, mode is the initialisation value by
Chiller unit.
10.When SNVT which is transmitted from HARC, is used
by other control device, premise that there is two
minutes delay between the transmitting SNVT and
the movement Chiller unit . If it isn't premised, then
a problem may occurs in the control system.
11.Don't interrupt the power supply of HARC when you
use SCPT in HARC. Even if it exceeds
MaxSendTime, when SNVT is not transmitted from
HARC, and SNVT is transmitted below with the
setting value of MinSendTime, then transmit SCPT
again . If it isn't carried out, SCPT value continues
maintaining "0".
12.If the setting of control panel change Remote to
Locally, and set Remote again, then set the setting
temperature and mode from the Monitoring Device
again. If it does not set, then the setting temperature
and mode continue maintaining the initialisation
value by Chiller unit.
13.When the abnormal transmitting occurs between the
Monitoring Device and HARC, then the condition of
the Monitoring Device may not correspond with the
condition of HARC. Set MaxSendTime and, try that
the condition of the Monitoring Device corresponds
with the condition of HARC in the interval of
MaxSendTime .
14.It can't be used with the except for " stop signal of
input terminal of Chiller unit ".