Carrier 38YCW Phase-Monitor LED Indicators, COOLING-ONLY Procedure Example, Final Checks

COOLING-ONLY PROCEDURE

NOTE: If superheat- or subcooling-charging conditions are not favorable, charge must be weighed in accordance with unit-rating plate ±0.6 oz/ft of 3/8-in. liquid line above or below 15 ft respectively.

EXAMPLE:

To calculate additional charge required for a 25-ft line set:

25 ft – 15 ft = 10 ft X 0.6 oz/ft = 6 oz of additional charge

HEATING CHECK-CHART PROCEDURE

To check system operation during heating cycle, refer to the Heating Check Chart on outdoor unit. This chart indicates whether a correct relationship exists between system operating pressure and air temperature entering indoor and outdoor units. If pressure and temperature do not match on chart, system-refrigerant charge may not be correct. Do not use chart to adjust refrigerant charge.

NOTE: When charging is necessary during heating season, charge must be weighed in accordance with unit rating plate ±0.6 oz/ft of 3/8-in. liquid line above or below 15 ft respectively.

Step 14—Final Checks

IMPORTANT: Before leaving job, be sure to do the following:

1.Securely fasten all panels and covers.

2.Tighten service valve-stem caps to 1/12-turn past finger-tight.

3.Leave User’s Manual with owner. Explain system operation and periodic maintenance requirements outlined in manual.

4.Fill out Dealer Installation Checklist and place in customer file.

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Table 2—Phase-Monitor LED Indicators

LED	STATUS
OFF	No call for compressor
	operation
FLASHING	Reversed phase
ON	Normal

Fig. 7—Phase-Monitor Control

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