Toshiba HWS-803XWHM3-E Service Manual page 63

Item
8-3. 3) Circulation pump control
Hydro Unit Control
One circulation pump (enhancing pump P2) can be connected to the unit in addition to the built-in circulation
pump P1.
You can change the settings of the built-in pump P1 and the enhancing pump P2 using DP_SW10-1, 2, and
3 in the hydro unit.
Item
AC pump
If the enhancing pump P2 is set to Non-interlock, the pump P1 is always energized.
3-1) Controlling the built-in circulation pump P1
Pump type: AC motor, rated voltage 230V, three-speed (changed manually)
The pump operation starts under the condition below:
• When the [HOT WATER] or [ZONE1,2] button is pressed.
The pump operation stops under the condition below:
• When the [HOT WATER] or [ZONE1,2] button is press ed. (Operation will stop fully in about 1 minute.)
The pump operation stops/restarts under the conditions shown below.
• When changing operation modes, the pump stops for 30 seconds.
Boiler is installed or not
(Not installed)
3-2) Controlling the built-in pump P1 during the hot water supply operation
You can change the action of the built-in pump P1 during the hot water supply operation using DP_SW10-1.
• DP_SW10-1 OFF(Default): The pump stops as the HP for hot water supply stops.
• DP_SW10-1 ON: The pump is always energized.
3-3) Controlling the built-in pump P1 during the heating operation
You can change the action of the built-in pump P1 during the heating operation using DP_SW10-2.
• DP_SW10-2 OFF(Default): The pump is always energized.
• DP_SW10-1 ON
3-4) Enhancing circulation pump P2
Pump type: AC motor, rated voltage 230V, connectable directly up to 200W rated power output.
You can select whether the pump P2 is interlocked with the pump P1 using DP_SW10-3. The pump P1 is always
energized if the pump P2 is not interlocked.
3-5) Controlling the enhancing pump P2
You can change the action of the enhancing pump P2 during cooling operation by setting FC64.
• FC64="00"(Default): The pump is always energized.
• FC64="01"
3-6) Controlling the built-in pump P1 during cooling operation controlled with the room temperature thermostat or room
temperature remote control.
You can change the action of the built-in pump P1 by setting FC65.
• FC65="00"(Default): The pump is always energized.
• FC65="01"
Related FC
FC No.
5A
64
65
9E
Operation flow and applicable data, etc.
01: Built-in pump P1's action during how water supply operation:
HP operation only/Always energized
02: Built-in pump P1's action during heating operation:
Always energized/Turned off when TO sensor detect over than 20°C.
03: Enhancing pump P2's action:
Interlock/Non-interlock with the built-in pump P1
04: None
Boiler position
(DPSW13_2)
0 (After 3-way valve, heating side)
0
1 (Before 3-way valve)
0 (After 3-way valve, heating side)
1
(Installed)
1 (Before 3-way valve)
: The pump stops when To ≥ 20°C. (Practically the HP for heating is turned off.)
: The pump is always stopped.
: The pump is stopped when the thermostat is turned off.
Setting item
Control of the pump P1 during the hot water supply operation
Control of the pump P2 during in cooling operation
Control of the pump P1 while using the room temperature control
or room temperature thermostat
Turn off the P1 when TO sensor detect over than this temperature 0: 20°C
Operation
P1 pump control
Stop/restart temperatures
(DPSW02_1)
(TWI or TWO or THO)
Default
0: Interlocked with HP
0: Always ON
0: Always ON
62
Initial value
OFF: HP operation SW10-1
only
OFF: Always SW10-2
energized
*2
OFF: Interlock SW10-3
70°C / 68°C
70°C / 68°C
70°C / 68°C
58°C / 55°C
Setting value
1: Always energized
Equal to DPSW10-1
1: Always stopped
1: Stopped when the
thermostat is OFF
10~30°C
DPSW