Gree D Series Service Manual

10
D Series Modular Air-cooled Scroll Chillers
Service Manual
DPOUSPM
2 CONTROL LOGIC
2.1 Cooling Control
2.1.1 Control to the Compressor
(1). “First On, First Off”
“First On, First Off”/“First Off, First On” control indicates the numbered compressor which is started/stopped
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(2). Temperature Drop/Rise Rate Control
The water temperature range control assisted by the temperature drop/rise rate control is capable of
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2.1.2 Freeze Protection
For each single module, when the anti-freezing temperature or the leaving water temperature is lower than
the limit value, freeze protection will work and this module stops; when the anti-freezing temperature and the
leaving water temperature go higher than the normal value, freeze protection will quit; when the anti-freezing
temperature and the leaving water temperature are between the limit value and the normal value, the module is
protected again freeze.
2.1.3 Shutdown
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pump keeps running.
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unchanged and the water pump keeps running.
2.2 Heating Control
2.2.1 Control on the Compressor
It is the same as that in selection 2.1.1.
2.2.2 Over-temperature Protection
For each single module, when the over-temperature is higher than the limit value, over-temperature
protection will work; when the over-temperature goes lower than the normal value, over-temperature protection
will quit; when the over-temperature is between the limit value and the normal value, the module is still
protected again over-temperature.
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change of the entering water temperature.
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2.2.4 Shutdown
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ТОО "Everest climate" г. Алматы, Варламова 1а, тел.+7 727 230 00 10, e-mail: info@aircon.kz, сайт:www.aircon.kz

Gree D Series Specifications

General

Brand	Gree
Model	D Series
Category	Chiller
Language	English