Tank Booster Heater Control; Base Pan Heater Control (Optional) - Panasonic WH-MXC16G9E8 Service Manual

12.9

Tank Booster Heater Control

12.9.1 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 heatpump startup time in tank mode, or during
o
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],
o
20 minutes since previous heater off.
o
* 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
o
When BOOSTER HEATER DELAY TIMER start count after switch from heating heat-up interval to tank
o
heat-up interval
* DELAY TIMER can be set by control panel.

12.10 Base Pan Heater Control (Optional)


To enable the base pan heater function, control panel initial setting has to be manually adjusted by activating
Base Pan Heater menu.

There are 2 optional start condition can be selected, Type A or Type B.

Control details:
1 Type A: (Default Auto Mode)
Start conditions:
When outdoor air temperature ≤ 3°C during heating and deice operation is ON.
o
Control contents:
Base pan heater is ON during deice operation and continues ON for 10 minutes after deice operation
o
ends.
Cancel condition:
When outdoor temperature > 6°C after deice end or
o
When operation is not at heating mode or
o
Base pan heater ON timer count is completed.
o
2 Type B: (ON Mode)
Start conditions:
When outdoor air temperature is ≤ 5°C and operates in heating mode, base pan heater is ON.
o
Cancel conditions:
When outdoor air temperature is > 7°C or
o
When operation is not at heating mode.
o
Note:
* Base pan heater cannot be ON during test mode and stand by mode.
Heater OFF
Tank set temperature +
[-7°C]
Heater ON
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