Tank Booster Heater Control; Three Way Valve Control; Sterilization Mode; Quiet Operation - Panasonic WH-MXF09D3E8 Service Manual

12.10 Tank Booster Heater Control

12.10.1 Tank booster heater control
Heating operation condition:
Tank set temperature +
[+2°C]
1. Booster heater Turn On condition:
•
After BOOSTER HEATER DELAY TIMER fulfill during heat pump startup time in tank mode, or during
switching from heating heat-up interval to tank heat-up interval in heat + tank mode (heating priority not set).
•
Tank temperature < tank set temperature + [-5°C],
•
20 minutes since previous heater off.
* BOOSTER HEATER DELAY TIMER is clear when tank heat-up interval end.
2. Booster heater Turn Off condition:-
•
Tank temperature > tank set temperature + [+2°C] for continuous 15 sec
•
When BOOSTER HEATER DELAY TIMER start count after switch from heating heat-up interval to tank heat-
up interval
* DELAY TIMER can be set by remote control.

12.11 Three Way Valve Control

•
Purpose:
3 ways valve is used to change flow direction of hot water from heat pump between heating side and
o
tank side
•
Control contents:
1. 3 ways valve switch Off:
•
During 3 ways valve switch Off time, the hot water will provide heat capacity to heating side.
2. 3 ways valve switch On:
•
During 3 ways valve switch On time, the hot water will provide heat capacity to tank side.
3. Stop condition:
•
During stop mode, 3 ways valve will be in switch off position

12.12 Sterilization Mode

1. During Sterilization mode, Tank will be heat up to the Sterilize Set temperature for a certain period of time, also
set by controller.
2. The function can only be set on timer to operate once in a week.
3. It will be cancelled even when the temperature is not reached after 4 hours.
4. When tank mode is OFF or disabled, sterilization is cancelled.

12.13 Quiet Operation

•
Purpose:
To provide quiet operation compare to normal operation by reduces mono bloc unit noise.
o
•
Starting condition:
1. When quiet button is presses.
2. When quiet request ON time by weekly timer (Refer to remote control.)
•
When any of above mentioned condition is achieved, this control is activated.
New target FM speed = Present target FM speed - 80 rpm
Minimum target FM speed = 200 rpm
Heater OFF
Tank set temperature +
[-5°C]
Heater ON
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