22
7.3 - Flow control
Evaporator flow switch and chilled water pump interlock
IMPORTANT: On 30XW 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.
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 M16 - 171 - 210 Nm
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.
Water box tightening sequence
NOTE: Before this operation we recommend draining the
circuit and disconnecting the pipes to be sure that the bolts
are correctly and uniformly tightened.
7.2 - Water connections
The water connections are Victaulic type connections. The inlet and outlet connection diameters are identical.
Inlet/outlet diameters
Standard-efficiency units 30XW-- / 30XWH-
Size
254 304 354 402 452 552 602 652 702 802 852 1002 1052 1154 1252 1352 1452 1552 1652 1702
Evaporator
Units without option 100C
Nominal diameter
in
5
5
5
5
5
5
5
6
6
6
6
6
6
8
8
8
8
8
8
8
Actual outside diameter mm
141.3 141.3 141.3 141.3 141.3 141.3 141.3 168.3 168.3 168.3 168.3 168.3 168.3 219.1 219.1 219.1 219.1 219.1 219.1 219.1
Option 100C
Nominal diameter
in
5
5
5
6
6
6
6
6
6
6
6
6
6
8
8
8
8
8
8
8
Actual outside diameter mm
141.3 141.3 141.3 168.3 168.3 168.3 168.3 168.3 168.3 168.3 168.3 168.3 168.3 219.1 219.1 219.1 219.1 219.1 219.1 219.1
Condenser
Units without option 102C
Nominal diameter
in
5
5
5
5
5
5
5
6
6
6
8
8
8
8
8
8
8
8
8
8
Actual outside diameter mm
141.3 141.3 141.3 141.3 141.3 141.3 141.3 168.3 168.3 168.3 219.1 219.1 219.1 219.1 219.1 219.1 219.1 219.1 219.1 219.1
Option 102C
Nominal diameter
in
6
6
6
6
6
6
6
8
8
8
8
8
8
8
8
8
8
8
8
8
Actual outside diameter mm
168.3 168.3 168.3 168.3 168.3 168.3 168.3 219.1 219.1 219.1 219.1 219.1 219.1 219.1 219.1 219.1 219.1 219.1 219.1 219.1
High-efficiency units 30XW-P / 30XWHP
Size
512
562
712
812
862
1012
1162
1314
1464
1612
1762
Evaporator
Units without option 100C
Nominal diameter
in
6
6
8
8
8
8
8
8
8
10
10
Actual outside diameter mm
168.3
168.3
219.1
219.1
219.1
219.1
219.1
219.1
219.1
273.1
273.1
Option 100C
Nominal diameter
in
6
6
8
8
8
8
8
8
8
10
10
Actual outside diameter mm
168.3
168.3
219.1
219.1
219.1
219.1
219.1
219.1
219.1
273.1
273.1
Condenser
Units without option 102C
Nominal diameter
in
6
6
8
8
8
8
8
8
8
10
10
Actual outside diameter mm
168.3
168.3
219.1
219.1
219.1
219.1
219.1
219.1
219.1
273.1
273.1
Option 102C
Nominal diameter
in
8
8
8
8
8
8
8
8
8
10
10
Actual outside diameter mm
219.1
219.1
219.1
219.1
219.1
219.1
219.1
219.1
219.1
273.1
273.1
