Sanyo CHDX07263 Types of Electronic Thermostatic Expansion Valves, Power Initialization

7.Outdoor Unit Electronic Thermostatic Expansion Valves [MOV1, MOV2 & MOV4]

W-2WAY ECO-i SYSTEM Control Functions

7-1. Types of Electronic Thermostatic Expansion Valves

[CHDX07263, CHDX09663]

	Capacity	72	96
	Electronic	Heat exchanger	Heat exchanger
	control valve 1	1 valve	1 valve
Electronic	Electronic	Heat exchanger	Heat exchanger
control valve	control valve 2	2 valve	2 valve	1
	Electronic	For SC circuit	For SC circuit
	control valve 4

7-2. Power Initialization

If no indoor units have started (even once) after the power was turned ON, the outdoor unit electronic control valve operates at 480 pulses.

7-3. Heat Exchangers which are controlled by each Electronic Thermostatic Expansion Valve

The configuration of heat exchangers is as shown in the figure below. MOV3 is excluded.

Heat

exchanger 1

Heat exchanger 2

Front

Operation of Electronic Thermostatic Expansion Valve during normal unit operation

If any one compressor in the outdoor unit is operating, the outdoor heat exchanger coil is used.

In cooling operation, all the inverter compressors are designed to operate, therefore, all the outdoor heat exchangers in the outdoor units will be used.

SH control controls the difference between the liquid temperature and gas temperature to 2°F ~ 10°F.

During heating mode SH operation in the heat exchanger 2 side, in order to prevent a liquid-back or high load operation from occurring a control may be implemented so that refrigerant may not flow intentionally to the heat exchanger.

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