Lennox XC25-024-230-01 User Manual

29
XC25
Servicing Units Delivered Void of Charge
If the outdoor unit is void of refrigerant, clean the system us
ing the procedure described below.
1. Leak test the system using the procedure outlined on
page 22.
2. Evacuate the system using procedure outlined on
page 23.
3. Use nitrogen to break the vacuum and install a new fil
ter drier in the system.
4. Evacuate the system again using procedure outlined
on page 23.
5. Weigh in refrigerant using procedure outlined in figure
57.
6. Monitor the system to determine the amount of mois
ture remaining in the oil. It may be necessary to replace
the filter drier several times to achieve the required dry
ness level. If system dryness is not verified, the
compressor will fail in the future.
Unit Start-Up
IMPORTANT
If unit is equipped with a crankcase heater, it should be
energized 24 hours before unit start-up to prevent
compressor damage as a result of slugging.
1. Rotate fan to check for binding.
2. Inspect all factory- and field-installed wiring for loose
connections.
3. After evacuation is complete, open both the liquid and
vapor line service valves to release the refrigerant
charge contained in outdoor unit into the system.
4. Replace the stem caps and tighten to the value listed
in table 1.
5. Check voltage supply at the disconnect switch. The
voltage must be within the range listed on the unit's
nameplate. If not, do not start the equipment until you
have consulted with the power company and the
voltage condition has been corrected.
6. Set the thermostat for a cooling demand. Turn on
power to the indoor unit and close the outdoor unit dis
connect switch to start the unit.
7. Recheck voltage while the unit is running. Power must
be within range shown on the nameplate.
8. Check system for sufficient refrigerant by using the
procedures listed in the System Refrigerant section on
page 69.

Lennox XC25-024-230-01 Specifications

General

Brand	Lennox
Model	XC25-024-230-01
Category	Air Conditioner
Language	English

Summary

Overview

Specifications

Lists technical specifications including sound rating, refrigerant charge, and fan details.

Electrical Data

Provides detailed electrical information like current, voltage, and power ratings for components.

Unit Dimensions

Shows physical dimensions with diagrams and measurements for the outdoor unit.

Installation

Unit Placement

Covers positioning considerations, clearances, and slab requirements for unit installation.

Line Set Installation

Details installation practices for refrigerant line sets, including isolation and routing.

Flushing the System

Outlines the process for flushing line sets and indoor coils, especially for refrigerant conversion.

Evacuating the System

Explains critical steps for creating a deep vacuum in the system using vacuum pump and micron gauge.

System Operation and Service

7-Segment Alert and System Status Codes

Lists and explains error codes displayed on the 7-segment display for system diagnostics.

Unit Wiring Diagrams

Presents wiring diagrams for different unit models to aid troubleshooting and installation verification.

Unit Sequence of Operations

Illustrates the overall unit operation sequence, including power-up and component interactions.

Component Testing

Covers testing procedures for key components like pressure switches, compressor, and sensors.

System Refrigerant

Weigh-In Charging Method

Details the procedure for weighing in the initial refrigerant charge based on line set length.

Subcooling Charging Method

Explains how to verify refrigerant charge using the subcooling method for system setup.