Samsung AM080FX A Series - Page 316

Samsung Electronics 335
Piping Diagram
Main cooling operation
▪ Purpose
Switch to heating mode on some indoor units while using cooling mode
▪ Control specifications in detail
Actuator - Main Cooling
Compressor COMP
Operation
Target low pressure control
(default : 8kgf/cm2,g)
Range 14~140Hz
Outdoor Fan Motor OFM
Operation
Target high pressure control
(default : 25kgf/cm2,g)
Range 0-39step (0-1300rpm)
Electronic Expansion Valve – Main (Main EEV) E_M
Operation
Cooling & Heating
capacity balance control
Range 300-2000step
Electronic Expansion Valve – EVI (EVI EEV) E_EVI
Operation
*Subcooling control
(default: SC 20 K)
Range 0-480step
Solenoid Valve - 4way V_4W Operation Off
Solenoid Valve – EVI Bypass V_EB Operation
On (Open):
* T_a > 38℃ or 50Hz ↓
Off (Close):
T_a < 36℃↓ and 70Hz ↑
Solenoid Valve – EVI V_EVI Operation On (Open)
Solenoid Valve – Hot Gas Bypass V_HG Operation Off (Close)
Solenoid Valve – Accumulator Oil Return V_AR Operation On (Open)
Solenoid Valve – Hot Gas Bypass 2 (HR Only) V_HG2 Operation Off (Close)
Solenoid Valve – Main EEV (HR Only) V_ME Operation Off (Close)
Solenoid Valve – Main Cooling (HR Only) V_MC Operation On (Open)
7-3 Functions (cont.)
7-3-2-3 Normal operation modes (cont.)
7-3-2 Control (cont.)