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System suggestions
Total height
(tilt height)
2240
Conn. cw/hw - 2230
Unit
top - 2155
Power
supply - 1885
Coil 3/4"- 1650
Coil 3/4"- 1050
T&P
valve - 975
Flo/ret.1" - 830
Power
supply - 710
Coil 3/4" - 665
Flo/ret.1" - 465
Coil 3/4" - 385
Coil 3/4" - 335
Coil 3/4" - 225
Heat
Flo/ret.1" - 115
pump
Unit bottom - 0
Troubleshooting
1. No space heating: Check that cirkulation pump is running. Remove any air in the system/radiators. Check return valve settings.
2. Not enough Hw:
Open mixing valve fully. Check power supply. Press 'reset'-button on thermostat
Check elements. Check entire system for leaks.
3. Not enough heat: Check circulation pump - turn pump axle. Check power supply and thermostats. Remove any air from the system.
4. SV 3 bar leaking:
Safety valve may need replacing. Or expansion vessel is defect - if water is coming out of air valve.
5. SV9 / PT15 leaking: Cw pressure above 6 bar: Fit reduction valve, and expansion vessel if necessary. Replace valve or lower temp.setting
6. Leaking:
Inspect all pipe connections. Turn power off, check elements. The wessel itself is rarely the cause.
Contact your supplier/installer when problems.
OSO recommends that the installation is performed by an authorized installer.
Electrical installation must be performed by an authorized installer.
Important technical information
• Operating pressure upper vessel max 9 bar. Recommended 6 bar. Test pressure 15 bar.
• Operating pressure lower vessel max 3 bar. Test pressure 4,5 bar.
• If inlet water pressure is above 6 bar it is recommended that a reduction valve is fitted.
• If the water has a chloridic content above 50 mg. Cl/l. an anode must be fitted (see 'Optional parts' in page 13).
• Max. approved water temperature 98°C. Max. underfloor heating water temperature 55-60°C.
• Repairs to piping and electric equipment must be performed by an authorized installer. Use only original spare parts.
• If cold water supply is shut off, turn off power to unit. Failure to comply will void guarantee.
12
Hw
EPTRC 400
EPTC 400
Forandringer forbeholdes / Subject to change without notice
Suggestion for EPTRC with heat
pump and solar panel. The system
requires a MX18 pump central.
Supplies domestic hot water from
upper vessel and space heating
from lower vessel.
Top view
Cw
Coil connection: Tap water 75° right,
heat source(s) 90° left.
MX 18
(disconnect power supply first).
EPTRC 400
Space heating
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