ESIE09-05
Special Control
Function
29
3.3 Defrosting Operation
The defrost operation is performed to solve frost on the outdoor unit heat exchanger when
heating, and the heating capacity is recovered.
[Conditions to start]
The defrost operation is started referring following conditions.
Outdoor heat exchanger heat transfer co-efficiency
Temperature of heat-exchange (Tb)
Timer (2 hours at the minimum)
In addition, outdoor heat-exchange co-efficiency is derived from Tc, Te, and the compressor
load.
* From the preparing operation to the defrost operation, and from the defrost operation to the
operation after defrost, the compressor stops for 1 minute to reduce noise on changing of the
four way valve.
Outdoor unit actuator
Defrost preparation
operation
Defrost operation
Post Defrost operation
Compressor
Upper limit control
140 Hz Full load
2-step increase from
36 Hz Unload to
(Pc - Pe>0.4 MPa)
every 20 sec.
Outdoor unit fan
STEP8
OFF
STEP8
Four way valve
ON
OFF
ON
Main electronic expansion valve
(EV1)
SH control
480 pls
55 pls
Subcooling electronic expansion
valve (EV3)
0 pls
0 pls
0 pls
Hot gas bypass valve (SVP)
OFF
ON
ON
Ending conditions
2 min.
•
15 min.
•
Tb>11°C
•
Ts1 - Te<5°C
•
160 sec.
•
Pc - Pe>0.4MPa
or
&
{
or
AHU actuator
Heating oil return operation
Fan
Thermostat ON unit
Field setting
Stopping unit
OFF
Все каталоги и инструкции здесь:
http
:
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Содержание ERQ
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Страница 22: ...Specifications ESIE09 05 12 Specifications http splitoff ru tehn doc html...
Страница 30: ...Functional Parts Layout ESIE09 05 20 Refrigerant Circuit http splitoff ru tehn doc html...
Страница 52: ...Outline of Control ESIE09 05 42 Function http splitoff ru tehn doc html...
Страница 63: ...ESIE09 05 Wiring Diagram of Control Box Control Box 53 3 2 F box http splitoff ru tehn doc html...
Страница 127: ...ESIE09 05 Installation and Operation Manual 117 Part 8 Installation and Operation Manual http splitoff ru tehn doc html...
Страница 240: ...Wiring Diagrams ESIE09 05 230 Appendix 2 2 Field Wiring ERQ 100 125 140 A7V1B http splitoff ru tehn doc html...