Sanyo CHDX07263, CHDXR09663 Indoor Unit Control of the Electronic Control Valve, Normal Control

10. Indoor Unit Control of the Electronic Control Valve

W-2WAY ECO-i SYSTEM Control Functions

10-1. Normal Control

(1) Cooling operation

			Position of electronic control valve
			Outdoor unit operating	Outdoor unit
				stopped
	Stopped		20	20
		Fan	20	20
		Thermostat	20	20
		OFF
Cooling
		Thermostat	Performs SH control in the range of 55 – 480	–
		ON	pulses.

1

*The SH target value is controlled so that the E3 - E1 becomes between 2°F to 6°F, depending on the operating conditions.

However, a decline in the required level may cause the SH target value to increase. Be aware that in this case, the electronic control valve closes slightly. This can be easily identified incorrectly as insufficient gas.

(2)Heating operation

(A)Except Type D

			Position of electronic control valve
			Outdoor unit operating	Outdoor unit
				stopped
	Stopped		Liquid refrigerant is gradually returned to the outdoor unit	85
			at pulses ranging from 55 to 80.
		Fan	Liquid refrigerant is gradually returned to the outdoor unit	85
			at pulses ranging from 55 to 80.
		Thermostat	Liquid refrigerant is gradually returned to the outdoor unit	85
		OFF	at pulses ranging from 55 to 80.
Heating
		Thermostat	Performs SC distribution control within the range of 55–	–
		ON	480 pulses.

*The SC target value is controlled so that the high pressure saturated temp. - E1 becomes between 10°F to 40°F , depending on the operating conditions.

(B) Type D

		Position of electronic control valve
		Outdoor unit operating
Stopped		20
	Fan	20
	Thermostat	20
	OFF
Heating
	Thermostat	Performs SC distribution control within the range of 55 –
	ON	480 pulses.

Outdoor unit

stopped

20

20

20

–

*The SC target value is controlled so that the high pressure saturated temp. - E1 becomes between 10°F to 40°F, depending on the operating conditions.

However, if installation is combined with except Type D, the high pressure saturated temp. - E1 may be controlled between 10°F to 80°F.

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