3-Way Valve (Diverter) Connection; 3-Way Mixing Valve Connection; Hot Water Cylinder Connection (Optional) - Toshiba HWT-601XWHM3W-E Installation Manual

Hydro Unit

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
DN 6B4
6B4
Type 1 2-wire spring return 0
Type 2 3-wire SPST 0
Type 3 3-wire SPDT 1
NOTE
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 to terminals 8, 9
and 10 on CN23.
• Connect the 3-way diverter valve in accordance with
the diagram below:
▼Fig.7-23
Type 1: SPRING RETURN
port "A" to Hot water
cylinder
port "AB" to
8
Hydro Unit
9
port "A" open
10
port "B" to Room heating
or cooling
27-EN
▼Fig.7-24
Type 2: SPST
port "A" to Hot water
cylinder
port "A"
close
.
port "AB" to
Hydro Unit
open
port "B" to Room heating
or cooling
▼Fig.7-25
Type 3: SPDT
port "A" to Hot water
cylinder
port "A"
close
port "AB" to
Hydro Unit
open
Hydro Unit
CN23
port "B" to Room heating
or cooling

3-way mixing valve connection

Required Actuator Specification
Electrical Specification:230 V; 50 Hz; <100 mA
Hydro Unit
The 3-way mixing valve is used to achieve the
temperature differential needed in a 2-zone heating
system.
CN23
• Connect the 3-way mixing valve to terminals 8, 9 and
8
10 on CN22 (for Type 1 mixing valve) or on terminals
7, 8 and 9 on CN22 (for Type 2 mixing valve).
9
• Connect the 3-way mixing valve in accordance with
10
the diagrams below:
▼Fig.7-26
Type 1: SPDT
port "A" to Zone 2 Heating
port "AB" to
Hydro Unit
Hydro Unit
CN23
8
9
port "B" BLANK OFF
10
▼Fig.7-27
Type 2: SPST
port "A" to Zone 2 Heating
port "AB" to
Hydro Unit
port "B" BLANK OFF

Hot water cylinder connection (optional)

• Please refer to "Electrical supply/cable
specifications" for fuse/cable size and for
connection details.
– 14 –
Electrical Connection (Hot Water Cylinder
Electric Heater)
• The electric heater, incorporated in the hot water
cylinder, requires a separate supply to Hydro Unit.
• Connect the hot water cylinder heater electrical
supply in accordance with shown below:
Live conductor: Terminal L on Terminal Block 02
Neutral conductor: Terminal N on Terminal Block 02
Earth Conductor: Earth terminal on Terminal Block
02
• Connect the hot water cylinder heater to the Hydro
Unit as shown below:
Live conductor to hot water cylinder: Terminal 1 on
Terminal Block 03
Neutral conductor to hot water cylinder: Terminal 2
on Terminal Block 03
Earth conductor to hot water cylinder: Earth terminal
Hydro Unit
on Terminal Block 03
CN22
▼Fig.7-28
7
open
8
Earth leakage breaker
9
10
port "A" 2
close
1
Terminal block 02
Hot water
cylinder
Electrical Connection (Hot Water Cylinder
temperature Sensor)
• Connect the hot water cylinder temperature sensor
Hydro Unit
as shown below to terminals 1 & 2 on CN20 in the
CN22
port "A"
Hydro Unit.
close
7 • Please ensure that the interconnecting cable,
open between the Hydro Unit and the hot water cylinder, is
8
connected to earth at both ends of the cable using
9 the shiel wire.
10
▼Fig.7-29
CN20
Installation Manual
INPUT Power
220-240 V ~
50 Hz
1 2 L N
Hydro Unit
28-EN