21
7.2 -
Water connections
The water connections are Victaulic type connections. The inlet and outlet connection diameters are identical.
Inlet/outlet diameters
30XW-PZE / 30XWHPZE
Size
301
401
451
551
601
651
801
901
1001
1101
Evaporator
Units without option 100C
Nominal diameter
in
5
6
6
8
8
8
8
8
8
8
Actual outside diameter
mm
141,3
168,3
168,3
219,1
219,1
219,1
219,1
219,1
219,1
219,1
Option 100C
Nominal diameter
in
5
6
6
8
8
8
8
8
8
8
Actual outside diameter
mm
141,3
168,3
168,3
219,1
219,1
219,1
219,1
219,1
219,1
219,1
Condenser
Units without option 102C
Nominal diameter
in
5
6
6
8
8
8
8
8
8
8
Actual outside diameter
mm
141,3
168,3
168,3
219,1
219,1
219,1
219,1
219,1
219,1
219,1
Option 102C
Nominal diameter
in
6
8
8
8
8
8
8
8
8
8
Actual outside diameter
mm
168,3
219,1
219,1
219,1
219,1
219,1
219,1
219,1
219,1
219,1
7.3 -
Flow control
Evaporator flow switch and chilled water pump interlock
IMPORTANT: The unit water flow switch must be energised,
and the chilled water pump interlock must be connected.
Failure to follow this instruction will void the Carrier
guarantee.
The water flow switch is installed on the evaporator water inlet
and adjusted by the control. If adjustment is necessary, it must be
carried out by qualified personnel trained by Carrier Service.
Terminals 34 and 35 are provided for field installation of the chilled
water pump interlock (auxiliary contact for pump operation to be
wired on site).
7.4 -
Evaporator and condenser water box bolt
tightening
The evaporator (and condenser) are of the shell and tube type
with removable water boxes to facilitate cleaning. Re-tightening
or tightening must be done in accordance with the illustration in
the example below.
NOTE: Before this operation we recommend draining the
circuit and disconnecting the pipes to be sure that the bolts
are correctly and uniformly tightened
Water box tightening sequence
Legend
1 Sequence 1: 1 2 3 4
Sequence 2: 5 6 7 8
Sequence 3: 9 10 11 12
Sequence 4: 13 14 15 16
2 Tightening torque
Bolt size M 16 - 171 - 210 Nm
7.5 -
Operation of two units in master/slave
mode
The control of a master/slave assembly is in the entering water
and does not require any additional sensors (standard
configuration). It can also be located in the leaving water. In this
case two additional sensors must be added on the common piping.
All parameters, required for the master/slave function must be
configured using the MST_SLV menu.
All remote controls of the master/slave assembly (start/ stop, set
point, load shedding etc.) are controlled by the unit configured as
master and must only be applied to the master unit.
Each unit controls its own water pump. If there is only one common
pump, in cases with variable flow, isolation valves must be installed
on each unit. They will be activated at the opening and closing by
the control of each unit (in this case the valves are controlled using
the dedicated water pump outputs). See the SmartVu
TM
control
manual for a more detailled explanation.
30XW with configuration: leaving water control
1
2
Legend
Master unit
Slave unit
Control boxes of the master
and slave units
Water inlet
Water outlet
Water pumps for each unit
(included as standard for units
with hydraulic module)
Additional sensors for leaving
water control, to be connected
to channel 1of the slave boards
of each master and slave unit
CCN communication bus
Connection of two additional
sensors
7 - WATER CONNECTIONS