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12.6 Indoor Back-Up Heater Control
12.6.1 Indoor
Electric Heater Control
1 Normal Heating Mode
o Heater
On
condition:
a. Heater switch is ON
b. After Heatpump thermo ON for [30] mins
c. After water pump operate [9] mins
d. Outdoor air temperature < Outdoor set temperature for heater
e. When water outlet temperature < Water set temperature + [-4°C]
f. [20] minutes since previous Backup heater Off
b. After Heatpump thermo ON for [30] mins
c. After water pump operate [9] mins
d. Outdoor air temperature < Outdoor set temperature for heater
e. When water outlet temperature < Water set temperature + [-4°C]
f. [20] minutes since previous Backup heater Off
* When heatpump cannot operate due to error happens during normal operation, heater will go into
force mode automatic
* Heater need to operate during deice operation
o Heater Stop Condition:
a. When outdoor set temperature > outdoor set temperature + [+2°C] for continuous 15 secs OR
b. When water out temp> water set temperature + [-2°C] for continuous 15 secs OR
c. Heater switch is Off OR
d. Heatpump thermo-off or OFF condition
b. When water out temp> water set temperature + [-2°C] for continuous 15 secs OR
c. Heater switch is Off OR
d. Heatpump thermo-off or OFF condition
2 Force
Heater
Mode
o Heater
On
condition:
a. After water pump operate [9] mins
b. When water outlet temperature < water set temperature + [-4°C]
c. [20] minutes since previous Backup heater Off
b. When water outlet temperature < water set temperature + [-4°C]
c. [20] minutes since previous Backup heater Off
o Heater Stop condition
a. Force mode off OR
b. When water outlet temperature > water set temperature + [-2°C] for continuous 15 secs
b. When water outlet temperature > water set temperature + [-2°C] for continuous 15 secs
* Do not operate heater at the following situation
1 Water outlet temperature sensor, and water inlet sensor abnormal
2 Flow switch abnormal
3 Circulation pump stop condition
1 Water outlet temperature sensor, and water inlet sensor abnormal
2 Flow switch abnormal
3 Circulation pump stop condition
12.6.2 Room Heater Operation during Deice
Purpose:
To protect the indoor Heat Exchanger from ice forming and prevent heat exchanger plate breakage.
Control content:
Control content:
This Heater protection control will activate only if the backup heater is enable at custom setup by remote
controller. Once fulfil the start condition, room heater will turn ON together (base on max heater capacity
selection) and stop together if stop condition is fulfilled.
* If the heater is request to turn ON OLP feedback will be detected.
selection) and stop together if stop condition is fulfilled.
* If the heater is request to turn ON OLP feedback will be detected.
Starting conditions:
During normal deice operation 4~9
Water outlet temperature < 10°C or
Outdoor air temperature < -10°C or
Water inlet temperature < 27°C
Water inlet temperature < 27°C
Heater operates when 1 ~2 fulfilled OR When 1 and 3 ~ 4 is fulfilled.
However, this control does not relate to Heater ON/OFF button on remote control.
Stop condition:
When normal deice end or
Water outlet temperature > 45°C
However, room heater keeps ON if indoor electric heater control activate.
However, room heater keeps ON if indoor electric heater control activate.
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