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STT40 / STT70
Assembly instructions 8-4
8.4. Connection of Return Air Cooler (Optional)
) A return air cooler must be used if the return air temperature is
higher than 149°F (+65 °C).
You can connect the return air cooler to a coolant circuit or to the water main network.
The water flow rate in the water main network
*
is for:
STT40 approx. 7.16 ft
3
(0.2 m
3
/h),
STT70 approx. 14.13 ft
3
(0.4 m
3
/h)
(
*
water temperature:42.8°F) (+6 °C)
Rate your coolant circuit accordingly.
Connect the coolant in- and outlets to the return air cooler.
Observe the flowing direction of the coolant.
Check the tightness of the connections.
Connections are made with ½” NPT.
Figure 15: Connection of Return Air Cooler STT40 (A) / STT70 (B)