Part 2 Functions & Controls

5.5.2 18,24,30kBtu/h Model

Starting the defrosting operation

1)Defrost operation will start when the conditions below are met:

a)Accumulation time of operation and the period after completion of defrost = 35 min.

b)After 10 minutes from re-starting the compressor and over 35 minutes of accumulated operating time, defrosting operation starts after 10 minutes.

c)Piping temperature of the outdoor heat exchanger is maintained below the defrost starting temperature for 4 minutes after 35 minutes continuous operation.

d)Exceeding 10 minutes after oil recovery operation

2)Outdoor piping temperature is below –6°C (21.2°F, Option) for starting defrosting operation.

 

Defrosting

 

 

Comp. Freqency

 

Model (kBtu/h)

Defrosting Comp. Frequency

EEV

18

90Hz

350

24

77Hz

350

30

90Hz

350

 

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Only for training and service purposes

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Heat Controller VMC24SB-1/VMH24SB-1, VMC09SB-1/VMH09SB-1 Starting the defrosting operation, 2 18,24,30kBtu/h Model

VMC12SB-1/VMH12SB-1, VMC18SB-1/VMH18SB-1, VMC24SB-1/VMH24SB-1, VMC09SB-1/VMH09SB-1, VMC30SB-1/VMH30SB-1 specifications

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