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Specific connection and schematic wiring diagrams are
shipped with the unit. Some piping and control schemes,
particularly those using a single water pump for both chilled
and hot water, must be analyzed to determine how and/or
if a flow sensing device will provide desired operation.
Follow the manufacturer's recommendations for selection
and installation procedures. General guidelines for flow
switch installation are outlined below :
1. Mount the switch upright, with a minimum of 5 pipe
diameters of straight horizontal run on each side. Do
not install close to elbows, orifices or valves.
Note : The arrow on the switch must point in the direc-
tion of flow.
Figure 9 - Evaporator water pressure drop
100
90
80
70
60
50
40
30
20
10
9
8
7
6
5
1
Table 4 - Evaporator data
RTRA model
Evaporator model
Water storage capacity
Minimum water flow
Maximum water flow
Water connection Ø
Flange
I
G
L
2
3
4
5
6
Flow (l/s)
107
587
l
95
l/s
4,5
l/s
13,5
Inch
3
PN 16
DN 80
2. To prevent switch fluttering, remove all air from the
water system.
Note : The UCM-CLD provides a 6 second time delay
after a «loss-of-flow» diagnostic before shutting the unit
down. Contact a qualified service representative if nui-
sance machine shutdowns persist.
3. Adjust the switch to open when water flow falls below
nominal. Refer to table 4 for minimum flow recom-
mendations. Flow switch contacts are closed on proof
of water flow.
I
G L
❇
7
8
9 10
20
108
108 HE
109
587
ES71
ES81
95
145
143
4,5
5,3
6,1
13,5
15,8
18,1
3
5
5
PN 16
PN 16
PN 16
13
❇
30
40
50
60 70 80 90 100
I
587
G
ES 71
L
ES 81
✽
ES 101
ES 121
109 HE
110
ES101
ES101
118
118
7,6
7,6
22,6
22,6
5
5
PN 16
PN 16
DN 125
110 HE
ES121
106
9,1
27,2
5
PN 16
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