Lennox HFC-410A Series User Manual

Page 19
ML14XC1 SERIES
Any excess high voltage field wiring should be trimmed and
secured away from any low voltage field wiring. To facilitate a
conduit, a cutout is located in the bottom of the control panel.
Connect conduit to the control panel using a proper conduit fitting.
ROUTING HIGH VOLTAGE/ GROUND AND CONTROL WIRING
HIGH VOLTAGE
FIELD WIRING
LOW VOLTAGE
FIELD WIRING
FACTORY
WIRING
WIRE RUN LENGTH AWG# INSULATION TYPE
LESS THAN 100' (30 METERS) 18 TEMPERATURE RATING
MORE THAN 100' (30 METERS) 16 35ºC MINIMUM.
Install low voltage wiring from outdoor to indoor unit and from thermostat
to indoor unit as illustrated.
HIGH VOLTAGE / GROUND WIRES
CONTROL WIRING
A Run 24VAC control wires through hole with grommet and secure with
provided wire tie.
B Make 24VAC thermostat wire connections. Locate the two wires from the
contactor and make connection using field provided wire nuts:
 Yellow to Y1
 Black to C (common)
NOTE — For proper voltages, select thermostat wire (control wires)
gauge per table above.
NOTE — Wire tie provides low voltage control wire strain relief and to
maintain separation of field installed low and high voltage circuits.
W1
Y
G
C
R
Y
G
C
THERMOSTAT INDOOR UNIT
POWER
HEAT
COOLING
INDOOR
BLOWER
COMMON
OUTDOOR
UNIT
Y1
C
W
R
SINGLE PHASE
NOTE — Do not bundle any excess 24VAC control wires inside
control panel.
CONTROL
WIRING
HIGH VOLTAGE
CONNECTIONS
(CONTACTOR)
GROUND
GROMMET
AND WIRE TIE
HIGH VOLTAGE
FLEXIBLE CONDUIT
A
B

Lennox HFC-410A Series Specifications

General

Brand	Lennox
Model	HFC-410A Series
Category	Heat Pump
Language	English

Summary

Unit Specifications and Components

Model, Serial, and Specifications

Identifies unit models, serial numbers, and key performance specifications.

Electrical Data and Unit Dimensions

Details electrical requirements, ampacity, voltage, and physical dimensions.

Unit Parts Arrangement

Illustrates the layout and identification of major components within the unit.

Component Specs and Service Valves

Lists specs for service valves, metering devices, and gauge set usage.

Refrigerant Line Set Installation and Brazing

Line Set Selection and Filter Drier

Guidelines for choosing line sets and installing the liquid line filter drier.

Refrigerant Line Installation and Isolation

Demonstrates proper methods for installing and isolating refrigerant lines.

Brazing Connections Procedures and Safety

Covers safe and effective procedures for brazing refrigerant line set connections.

System Flushing, Testing, and Evacuation

Flushing Line Set and Indoor Coil

Describes the process for flushing the system to remove contaminants.

Installing Indoor Metering Device

Instructions for installing expansion valves or fixed orifices in the indoor coil.

Leak Test Line Set and Indoor Coil

Outlines the process for detecting leaks in the refrigerant line set and indoor coil.

Evacuating the Refrigerant System

Details the steps to remove air and moisture from the system to create a vacuum.

Electrical Connections and Wiring

Electrical Safety and Thermostat Installation

Covers electrical safety precautions and thermostat installation guidelines.

Routing High Voltage and Control Wiring

Provides guidance on properly routing high voltage, ground, and control wiring.

Typical Field Wiring Diagrams

Illustrates the factory and field wiring connections for the unit.

System Operation, Start-Up, and Maintenance

System Operation and Safety Features

Explains how the unit operates and describes safety switches like high pressure.

Routine Maintenance Recommendations

Lists essential yearly inspection and cleaning tasks for the system.

Start-Up and Performance Checklist

A checklist to verify proper system function and performance after installation.

Refrigerant Charging and Airflow Adjustment

Servicing Units Void of Charge and Start-Up

Procedures for servicing units without refrigerant and initial start-up steps.

System Refrigerant Charging Procedures

Details methods for connecting gauges, checking, and adjusting refrigerant charge.

Airflow Adjustment using Delta-T

Explains how to measure and adjust indoor coil airflow using the Delta-T method.