Trane RTXC-XE Series Installation, Operation And Maintenance Manual page 26

Table 4. Paddle Size of Water Flow Switch
Model
RTXC110XE, 110/130/140XE-HSE
RTXC160XE, 160XE-HSE
RTXC180XE, 180XE-HSE
RTXC200XE, 200XE-HSE
RTXC220XE, 220/250/280XE-HSE
26
• Refer to Table 4. Paddle Size of Water Flow
length.
• Ensure the paddle arm extends into the main run of the pipe and the arrow on the switch
must point in the direction of the water flow after switch tighten to final position.
• To prevent switch fluttering, remove all air from the water system.
• Adjust the switch to open when water flow falls below the required minimum shown on the
pressure drop curves as
• Wire flow switches in series with the water pump interlocks as in Trane wiring diagrams.
Note: Dual flow switch for assembly unit RTXC310/330/360/400/440XE,
310/330/360/400/440/500/560XE-HSE, install appropriate water flow switches at the water
outlet of each unit, refer to Section of Master - slave unit.
Figure 9. Flow Switch Installation
Recommended
Evaporator
Main Water
Water Pipe
Size
DN100 ≥ DN100
DN150 ≥ DN150
DN150 ≥ DN150
DN150 ≥ DN150
DN150 ≥ DN150
Figure 10. Evaporator Water Pressure Drop Curves
Water Flow Protection!
The Symbio 800 provides a 6-second time delay on the flow switch input before shutting
down the unit on a Loss of flow diagnostic. Contact a qualified service organization if nuisance
machine shutdowns persist.
Switch, select and trim the paddle to the right
Figure 10. Flow switch contacts are closed on proof of water flow.
Trim to Rated
Length Water
Pipe A Flow Rate
Size (mm) (L/s)
28
70
60
51
41
NOTICE
Min Max
Water Water
Flow Rate Flow Rate
(L/s) (L/s)
18 9.1 27.3
28 13.9 41.7
31 15.3 45.9
32 16.2 48.5
36 17.9 53.9
RTXC-SVX003D-EN