INSTALLATION, OPERATION AND MAINTENANCE MANUAL
9
Hydraulic connection diagram
It is suggested that open type hydraulic system should be installed according to following schemes.
Open expansion tank system
fig. 10
1. Safety Heat Exchanger (SHT)
6. Four Way Mixing Valve
2. Safety Valve (TS 131, STS 20)
7. CH Pump
3. Cold Water Feed
8. Heating System
4. System Safety Valve (3 bar –
1
/
2
")
9. Open Expansion Tank
5. NRV
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Open-type expansion tank must be equipped with the highest level in the entire hydraulic system.
■
The expansion tank must be selected properly against the changes in water volume resulting from heating and cooling.
■
The expansion tanks and their connecting pipes must be protected against to freezing.
■
Diameter of drainage pipe must be selected properly against to overflow into tank.
