Trane CXAJ series - Page 14

14
Unit Installation
System Connection Diagram
Direct Return
Connection
Disdirect Return
Connection
Expansion tank
Feed-water
Drain valve
Overflow
Tree-way valve
FCUFCU
FCUFCU
Exhaust valve
Drain valve
Pump Filter
Shockproof hose
Electric heater
Flow switch
Drain valve
Thermometer
Pressure gauge
Shutoff valve
Backup other pump is recommended
Principle Description
1. In order to avoid pipe rupture caused by the excessive pressure inside the system pipeline
when the ambient temperature changes and prevent the pneumatic hammer from occurring
in the pipeline, a pressure water tank is added on the pipe system.
2. To avoid the internal pressure is too high or low inside the pipeline, a water compensation
valve and a drain valve are added. When the pressure is lower than 0.6 bar, the water
compensation valve will be automatically opened for water compensation; when the pressure
is higher than 5 bars, the drain valve will automatically open the drain pipe for drainage.
3. The water compensation pressure can be adjusted according to actual conditions.