21
7 - WATER CONNECTIONS
7.3 -
Flow control
Evaporator flow switch and chilled water pump interlock
IMPORTANT: On 30XAS units, the unit water flow switch must be energised. 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, based on unit size and application. If
adjustment is necessary, it must be carried out by qualified personnel trained by Carrier Service.
Typical water circuit diagram
1
2
17
16
18
1 2
9
9
9
11
10
12
14
A
5
15
9
9
16
7
8
17
13
B
C
D
6
4
3
14
Legend
Components of the unit and hydraulic module
A Pressure sensor (A-B = ΔP evaporator)
B Pressure sensor
C Pressure sensor (C-D = ΔP water filter)
D Pressure sensor
1 Victaulic screen filter
2 Expansion tank
3 Relief valve
4 Available pressure pump
5 Drain valve
6 Flow control valve
7 Evaporator
8 Evaporator defrost heater (option)
9 Hydraulic module defrost heater (option)
10 Air vent (evaporator)
11 Water drain (evaporator)
12 Expansion compensator (flexible connections)
13 Flow switch
14 Water temperature sensor
15 Air vent
Installation components (supplied by the customer)
16 Flexible connection
17 Shut-off valve
18 Charge valve
--- Hydraulic module (supplied as an option)
7.4 -
Evaporator 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
below.
Water box tightening sequence
Legend
Tightening torque
Sequence 1: 1, 2, 3, 4
Bolt size M16 - 171 - 210 Nm
Sequence 2: 5, 6, 7, 8
Sequence 3: 9, 10, 11, 12
Sequence 4: 13, 14, 15, 16
NOTE: Before this operation we recommend draining the
circuit and disconnecting the pipes to be sure that the bolts
are correctly and uniformly tightened.
Содержание Aquaforce 30XAS Series
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