Toshiba ESTIA A09-01P, Quick Reference

Page: 17 / 31

Quick Reference Guide - Page 17
2-way valve (for cooling) connection
Required Valve Specification:
Electrical Specification: 230 V; 50 Hz; <100 mA
Return Mechanism: 2-wire spring return.
• The Hydro Unit has the facility to connect a 2-way valve to
isolate Space Conditioning Units that do not perform cooling,
when Cooling Mode is selected.
• Connect the 2-way valve in accordance with the diagram
(opposite):-
3-way valve (diverter) connection
Required Valve Specification:
Electrical Specification: 230 V; 50 Hz; <100 mA
Valve Diameters: Port A, Port B: Ø 1 1/4"
Return Mechanism: 3 types of 3-way valve (diverter) can be used.
Set the 3-way valve in use with the DIP switch SW13-1 on the Hydro Unit board.
Diverter Valve Description
SW13-1
Type 1 2-wire spring return OFF
Type 2 3-wire SPST OFF
Type 3 3-wire SPDT ON
Continuous operation of the valve motor at the fully open position is not recommended.
• The 3-way diverter valve is used to select either domestic hot water or space heating.
• Connect the 3-way diverter valve in accordance with the diagram below:-