Lennox KCC120S4M - User Manual

Page 1
UNIT INFORMATIONUNIT INFORMATION
Service Literature
WARNING
Electric shock hazard. Can cause injury
or death. Before attempting to perform
any service or maintenance, turn the
electrical power to unit OFF at disconnect
switch(es). Unit may have multiple power
supplies.
Table of Contents
Options / Accessories . . . . . . . . . . . . . . . . . . . . . . . Page 2

Blower Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6
Electrical Data /Electric Heat Data . . . . . . . . . . . . Page 10

I- Unit Components . . . . . . . . . . . . . . . . . . . . . . . Page 16
II- Placement and Installation . . . . . . . . . . . . . . . Page 27
III- Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 27
IV- Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 28
V- System Service Checks . . . . . . . . . . . . . . . . . Page 33
VI- Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 33
VII- Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 34
VIII-Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . Page 41

packaged electric units are available in standard cooling
󰀩
󰀨-
ent energy management thermostat control systems with
-
tions connect to the unit with jack plugs. When ”plugged
in” the controls become an integral part of the unit wiring.
       -
erates in single or multiple stages depending on the kW

ZCC units.
Information contained in this manual is intended for use

subject to change. Procedures outlined in this manual are
presented as a recommendation only and do not super-
sede or replace local or state codes.



for the proper rigging technique.
WARNING
Improper installation, adjustment, alteration,
service or maintenance can cause property damage,
personal injury or loss of life. Installation and service
must be performed by a licensed professional HVAC
installer or equivalent service agency.
WARNING
To prevent serious injury or death:
1- Lock-out/tag-out before performing maintenance.
2- If system power is required (e.g., smoke detector
maintenance), disable power to blower, remove
fan belt where applicable, and ensure all
controllers and thermostats are set to the “OFF”
position before performing maintenance.
3- Always keep hands, hair, clothing, jewelry, tools,
etc., away from moving parts.
CAUTION
As with any mechanical equipment, contact with
sharp sheet metal edges can result in personal
injury. Take care while handling this equipment and
wear gloves and protective clothing.
ZCC SERIES
7.5 to 12.5 ton
26.3 to 42 kW
100078
ZCC092 through 150

Lennox KCC120S4M Specifications

General

Brand	Lennox
Model	KCC120S4M
Category	Air Conditioner
Language	English

Summary

UNIT INFORMATION AND OVERVIEW

ZCC Series Product Introduction

Provides an overview of the ZCC Series units, including capacity and efficiency ratings.

Critical Safety Warnings and Cautions

Highlights essential safety precautions for handling and servicing the equipment.

UNIT SPECIFICATIONS

BLOWER DATA AND AIRFLOW

ELECTRICAL AND ELECTRIC HEAT DATA

7.5 Ton Unit Electrical and Heat Data

Presents electrical data, ratings, and electric heat capacities for 7.5 Ton units.

8.5 Ton Unit Electrical and Heat Data

Presents electrical data, ratings, and electric heat capacities for 8.5 Ton units.

10 Ton Unit Electrical and Heat Data

Presents electrical data, ratings, and electric heat capacities for 10 Ton units.

12.5 Ton Unit Electrical and Heat Data

Presents electrical data, ratings, and electric heat capacities for 12.5 Ton units.

ELECTRIC HEAT CAPACITIES

UNIT COMPONENTS AND CONTROLS

ESD Precautions and Control Box Details

Safety guidelines for handling electronics and details on control box components.

COOLING COMPONENTS AND OPERATION

OPERATION AND ADJUSTMENT PROCEDURES

DETERMINING UNIT CFM

CFM Measurement and Blower Belt Adjustment

Instructions for measuring CFM and adjusting blower belt tension.

OPTIONAL ELECTRIC HEAT COMPONENTS

ELECTRIC HEAT CONTROL ASSEMBLY

ELECTRIC HEAT VESTIBULE AND SECTION ARRANGEMENT

Electric Heat Section Arrangement

Diagram illustrating components within the electric heat section.

INSTALLATION AND STARTUP PROCEDURES

Preliminary Checks and Cooling Startup

Guides for initial unit checks and initiating cooling operation.

Safety Shutdown and Compressor Phasing

Procedures for safety shutdown and ensuring correct compressor phasing.

REFRIGERANT CHARGING

Refrigerant Charge and Check Procedure

Detailed steps for checking and adjusting refrigerant charge.

SERVICE CHECKS AND MAINTENANCE

Cooling System Checks and Filter Maintenance

Guides for cooling system checks, filter replacement, and safety warnings.

ENTHALPY CONTROL AND DAMPER ADJUSTMENTS

ECONOMIZER AND DCV OPERATION MODES

DCV Settings and Economizer Modes

Details Demand Control Ventilation (DCV) settings and economizer operation modes.

ECONOMIZER OPERATION MODES

Economizer Operation Table and Fans

Summarizes economizer operation based on thermostat demand and damper positions.

ECONOMIZER WIRING AND CONTROL MODULE

Economizer Wiring Diagram and Connections

Illustrates wiring connections for the economizer control module and sensors.

POWER EXHAUST AND DRAIN PAN SWITCH

Power Exhaust Fan Setpoint Adjustment

Explains how to adjust the power exhaust fan setpoint based on damper position.

WIRING DIAGRAMS AND SEQUENCE OF OPERATION

ZCC092;150 Unit Wiring Diagram

Provides a detailed wiring diagram for the ZCC092/150 unit.

SEQUENCE OF OPERATION

Blower and Cooling Stage Operation

Details the sequence for blower operation and multi-stage cooling.

THERMOSTAT WIRING DIAGRAM

Electronic;Electromechanical Thermostat Connections

STANDARD EFFICIENCY ECONOMIZER CONTROL

Economizer Power and Sequence of Operation

HIGH PERFORMANCE ECONOMIZER CONTROL

Economizer Control Module and Wiring

ELECTRIC HEAT WIRING AND ARRANGEMENT

Electric Heat Section Wiring Diagram

ELECTRIC HEAT WIRING AND COMPONENTS

Electric Heat Wiring Diagram and Key

ELECTRIC HEAT SEQUENCE OF OPERATION

First and Second Stage Electric Heat