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Lennox XC25 Series

Lennox XC25 Series
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Page 1
6/14/2013 507004-01
*2P6142013* *P507004-01*
E2013 Lennox Industries Inc.
Dallas, Texas, USA
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
General
This XC25 outdoor unit is designed for use with HFC-410A
refrigerant only.
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
THIS UNIT IS A INTEGRAL COMPONENT OF A SYSTEM THAT
WILL REQUIRE AN ICOMFORT WI-FI
®
THERMOSTAT AND
ICOMFORT™ -ENABLED AIR HANDLER OR FURNACE.
XC25
iComfort WI-FI
®
IMPORTANT: BEFORE APPLYING ANY POWER (MAIN, SOLAR
OR LOW VOLTAGE) TO THE OUTDOOR UNIT, THE FIELD MUST
CONFIRM ICOMFORT WI-FI
®
THERMOSTAT HAS VERSION 2.1
OR HIGHER SOFTWARE. (REFERENCE ICOMFORT WI-FI
®
THERMOSTAT MANUAL)
iComfort™-enabled
air handler or
furnace
INSTALLATION
INSTRUCTIONS
Dave Lennox Signature
®
Collection XC25 System
AIR CONDITIONERS
507004-01
6/14/2013
Supersedes 6/2013
PACKING LIST
OUTDOOR UNIT
WARRANTY
CARD
GROMMETS (2)
BUSHING (1)
RAST 6-PIN
CONNECTOR (1)
WARNING
Improper installation, adjustment, alteration, service or
maintenance can cause property damage, personal inju
ry or loss of life.
Installation and service must be performed by a licensed
HVAC professional installer (or equivalent) or service
agency.
STEP 1 -- SETTING THE UNIT -- Clearances
CONTROL
PANEL ACCESS
LOCATION
6 (152)
36 (914)
12 (305)
30 (762)
24
(610)
LINE SET
CONNECTIONS
ACCESS
PANEL
REAR VIEW OF UNIT
48 (1219)
MINIMUM CLEARANCE BETWEEN TWO UNITS
CLEARANCE ON ALL SIDES — INCHES (MILLIMETERS)
MINIMUM CLEARANCE
ABOVE UNIT
NOTES:
S Clearance to access panel must be 30
inches (762mm).
S Clearance to one of the other three
sides must be 36 inches (914mm).
S Clearance to one of the remaining two
sides may be 12 inches (305mm) and
the final side may be 6 inches
(152mm).
Note: Dimensions are not to scale.
FIGURE 1
Litho U.S.A.
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Lennox XC25 Series Specifications

General IconGeneral
Compressor TypeVariable Speed
Cooling CapacityUp to 5 tons
Sound RatingAs low as 59 dB
Energy Star CertifiedYes
RefrigerantR-410A
Stages of CoolingVariable
SEER Rating26
Warranty10-Year Limited Warranty on covered components

Summary

General

PACKING LIST

Lists components included with the XC25 outdoor unit.

WARNING (General Safety)

Important safety precautions for installation and service.

STEP 1 - SETTING THE UNIT - Clearances

CLEARANCE ON ALL SIDES

Specifies minimum clearance requirements around the XC25 unit.

MINIMUM CLEARANCE BETWEEN TWO UNITS

Details minimum spacing required between multiple XC25 units.

MINIMUM CLEARANCE ABOVE UNIT

Outlines required vertical clearance for the XC25 unit.

Outside Unit Placement

Guidelines for positioning the outdoor unit away from windows.

Slab Mounting at Ground Level

Describes how to mount the unit on a ground-level slab.

Elevated Slab Mounting using Feet Extenders

Details mounting the unit on a slab using feet extenders.

Stabilizing Unit on Uneven Surfaces

Instructions for stabilizing the unit on sloped or uneven ground.

UNIT DIMENSIONS AND SAFETY PRECAUTIONS

DANGER OF ROOF DAMAGE

Warning about potential damage to roofing materials from refrigerant oil.

IMPORTANT! EXHAUST GAS EXPOSURE

Caution regarding exhaust gas exposure affecting unit performance.

WARNING (PANEL HANDLING)

Safety precautions for handling and storing panels during installation.

WARNING (CALIFORNIA PROP 65)

California warning about potential chemical exposure from the product.

CAUTION (SHARP EDGES)

Warning about sharp sheet metal edges causing personal injury.

STEP 2 - REFRIGERANT PIPING - New or Existing Line Set and Indoor Coil

IMPORTANT! MINERAL OIL CONTAMINATION

Warning about residual mineral oil affecting heat transfer and warranty.

WARNING (POI OIL MOISTURE)

Caution about POI oils absorbing moisture and keeping system closed.

WARNING (REFRIGERANT INHALATION)

Warning about the dangers of inhaling refrigerant and responsible use.

WARNING (FIREEXPLOSION HAZARD)

Hazard warning about using oxygen for purging refrigeration lines.

WARNING (HIGH PRESSURE GAS)

Warning about using high-pressure gas regulators for pressurization.

IMPORTANT! SCROLL COMPRESSOR VACUUM PROTECTOR

Information on scroll compressor vacuum protector behavior.

IMPORTANT! CRANKCASE HEATER

Guidance on energizing unit with crankcase heater below 60°F.

COOLING SYSTEM (HFC-410 A) GUIDELINES

Guidelines for refrigerant piping sizing for XC25 systems.

SUCTION TRAPS

Requirement for installing suction traps based on elevation differences.

WEIGH IN CHARGING METHOD

Method for adjusting refrigerant charge based on line set length and temperature.

TABLE 1. STANDARD REFRIGERANT LINE SET

Standard line set sizes for up to 50 linear feet.

TABLE 2. XC25 LINE SET GUIDELINES

Guidelines for line set sizing between 51-150 linear feet.

TABLE 3. LIQUID LINE DIAMETER SELECTION TABLE

Table for selecting liquid line diameter based on length and elevation.

STEP 2 - REFRIGERANT PIPING - Removing Existing Indoor Metering Device

1 A TYPICAL EXISTING FIXED ORIFICE REMOVAL

Procedure for removing a fixed orifice metering device.

1 B TYPICAL EXISTING EXPANSION VALVE REMOVAL

Procedure for removing an existing expansion valve.

2 CONNECT GAUGES AND EQUIPMENT FOR FLUSHING PROCEDURE

Setup for connecting gauges and equipment for system flushing.

3 FLUSHING LINE SET

Detailed steps for flushing the line set and indoor coil.

STEP 2 - REFRIGERANT PIPING - Brazing Procedures

1 PIPING PANEL REMOVAL PREPARING LINE SET

Steps for accessing service valves and preparing refrigerant lines.

2 CAP AND CORE REMOVAL

Instructions for removing service port caps and cores.

3 ATTACH THE MANIFOLD GAUGE SET FOR BRAZING

Connecting manifold gauges for brazing with nitrogen flow.

CAUTION (BRAZING HAZARDS)

Health and safety precautions for brazing operations.

WARNING (REFRIGERANT BLEEDING)

Warning about fire danger when bleeding refrigerant and applying heat.

WARNING (WATER-SATURATED CLOTH)

Crucial warning about using water-saturated cloths during brazing.

4 WRAP SERVICE VALVES

How to protect service valve seals with water-saturated cloths.

5 FLOW NITROGEN

Procedure for flowing nitrogen through the system during brazing.

6 BRAZE LINE SET

Steps for brazing the liquid and suction/vapor lines.

IMPORTANT! BRAZING RODS

Recommended silver alloy brazing rods for copper and brass joints.

IMPORTANT! COOL BRAZED JOINTS

Guidance on cooling brazed joints to prevent damage to valve seals.

7 PREPARATION FOR NEXT STEP

Final preparation steps after brazing and cooling.

STEP 3 - INSTALLING INDOOR EXPANSION VALVE

INDOOR EXPANSION VALVE INSTALLATION

Detailed steps for installing the indoor expansion valve.

EQUALIZER LINE INSTALLATION

Instructions for installing the equalizer line for the expansion valve.

SENSING BULB INSTALLATION

Procedures for correctly positioning and installing the sensing bulb.

STEP 4 - LEAK TEST AND EVACUATION

1 CONNECT GAUGE SET

Connecting manifold gauge set for leak testing and evacuation.

2 TEST FOR LEAKS

Procedure for performing a leak test on the connected system.

3 EVACUATION CONNECT GAUGE SET

Connecting the gauge set for the evacuation process.

4 EVACUATE THE SYSTEM

Steps to evacuate the system to the required vacuum level.

WARNING! POSSIBLE EQUIPMENT DAMAGE

Warning against deep vacuum operation and compressor use for evacuation.

STEP 5 - ELECTRICAL - Circuit Sizing and Wire Routing

WARNING (HIGH VOLTAGE)

Electrical hazard warning regarding high voltage and stored charge.

1 SIZE CIRCUIT AND INSTALL DISCONNECT SWITCH

Sizing circuits and installing disconnect switches according to codes.

CAUTION (ELECTROSTATIC DISCHARGE)

Precautions to protect electronic controls from electrostatic discharge.

2 INSTALL THERMOSTAT

Guidelines for installing the room thermostat at the proper location.

Master Control Terminals and Connections

Details of master control jumpers, terminals, and their functions.

InputOutput Signal Descriptions

Explanation of various input and output signals for the control system.

4 ROUTE CONTROL WIRES

Guidelines for routing low-voltage control wires and thermostat connections.

5 ROUTE HIGH VOLTAGE AND GROUND WIRES

Instructions for routing high-voltage wiring and ground connections.

Charging and Maintenance Information

IMPORTANT! ROOM THERMOSTAT SETTING

Requirement to set thermostat for accurate charging.

Alarms

Information source for unit alarms and error codes.

Outdoor Control Seven-Segment Display and Push Button

Details on operating the outdoor control display and buttons.

System Component Configuration (Outdoor Unit)

How to configure the outdoor unit using the iComfort Wi-Fi® thermostat.

Homeowner Information

CAUTION (SERVICEMAINTENANCE)

Safety precaution to turn off power before service or maintenance.

IMPORTANT! SPRINKLERSSOAKER HOSES

Warning about water exposure corroding unit parts.

Outdoor Coil Maintenance

Recommendations for maintaining the outdoor coil for optimal operation.

Routine Maintenance

General routine maintenance tasks for the system, including filter checks.

Thermostat Operation

Reference to the thermostat manual for operation instructions.

Preservice Check

Checklist of items to verify before calling for service.

XC25 Start-Up and Performance Checklist

START-UP CHECKS

Section for recording initial operating parameters like amps and volts.

COOLING MODE CHECKS

Parameters to check during cooling mode operation.

HEATING MODE CHECKS

Parameters to check during heating mode operation.

System Refrigerant Charge

Calculations for subcooling, approach, and coil temperature drop.

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