Table of Contents
Advertisement
Quick Links
Installation, Operation and Maintenance
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
SPECIAL PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . 2
Special Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Précautions Particulières . . . . . . . . . . . . . . . . . . . . . . 2
Hazard Intensity Levels . . . . . . . . . . . . . . . . . . . . . . . 2
Hiérarchie Des Niveaux De Risques . . . . . . . . . . . . . 2
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
CONTROLS DESCRIPTION . . . . . . . . . . . . . . . . . . . 10
Microprocessor Control Board . . . . . . . . . . . . . . . . 10
Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
External Connections . . . . . . . . . . . . . . . . . . . . . . . . 10
Microprocessor PCB Battery (P/N CR2032) . . . . . . 10
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Infrared Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Self Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Receiver Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . 10
PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . 42
Unpack Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Blank Off Pieces . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Ceiling Opening Sizes . . . . . . . . . . . . . . . . . . . . . . . 42
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Step 1 - Hanger Bolts . . . . . . . . . . . . . . . . . . . . . . . 42
Step 2 - Installation Guide . . . . . . . . . . . . . . . . . . . 43
Step 3 - Condensate Piping . . . . . . . . . . . . . . . . . . 43
Step 4 - Duct Collars . . . . . . . . . . . . . . . . . . . . . . . . 43
Step 5 - Piping Installation . . . . . . . . . . . . . . . . . . . 44
Step 6 - Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Disconnect Switch . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Step 7 - Fascia Assembly . . . . . . . . . . . . . . . . . . . . 53
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53420033-01
Instructions
Printed in U.S.A.
Form No. 42WKN-12SI
Hydronic Ceiling Cassettes
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Pre-Start Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Page
Control Circuit Checks . . . . . . . . . . . . . . . . . . . . . . .53
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . .55
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
On/Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Fan Speeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Temperature Setpoint . . . . . . . . . . . . . . . . . . . . . . . .55
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Battery Replacement . . . . . . . . . . . . . . . . . . . . . . . . .55
CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Setting Jumper Links . . . . . . . . . . . . . . . . . . . . . . . .56
Main Control Functions . . . . . . . . . . . . . . . . . . . . . . .56
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . .57
Filter Removal and Cleaning . . . . . . . . . . . . . . . . . . .57
Recommended Spares . . . . . . . . . . . . . . . . . . . . . . .57
DISASSEMBLY PROCEDURE . . . . . . . . . . . . . . . . . .57
Fan Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Condensate Tray Removal . . . . . . . . . . . . . . . . . . . .58
Condensate Pump Removal . . . . . . . . . . . . . . . . . . .58
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . .58
REPLACEMENT PARTS . . . . . . . . . . . . . . . . . . . . . .61
SAFETY CONSIDERATIONS
Installing and servicing air-conditioning equipment can be hazard-
ous due to system pressure and electrical components. Only
trained and qualified service personnel should install and service
air-conditioning equipment. See Fig. 1 for Proposition 65 warning
label. To assist in installation see Table 1 for conversion factors.
Untrained personnel can perform basic maintenance such as
cleaning and replacing filters. All other operations should be per-
formed by trained service personnel. When working on air-
conditioning equipment, observe safety precautions in literature
and on tags and labels attached to the unit.
AirStream
42WKN08-36
Pg 1
8-24
Replaces: 42WKN-11SI
™
Advertisement
Table of Contents
Related Manuals for Carrier AirStream 42WKN20
Summarization of Contents
Safety Considerations
Special Precautions
Instructions must be followed for safe, efficient, and trouble-free operation.
Hazard Intensity Levels
Defines DANGER, WARNING, CAUTION, and IMPORTANT hazard classifications.
Controls Description
Microprocessor Control Board
Relays control indoor fan, outdoor fan, compressor, and electric heater for room conditions.
Infrared Receiver & Diagnostics
Infrared receiver function and self-diagnostic features including LED indicators.
Pre-Installation
Unit Preparation and Positioning
Includes unpacking, blanking pieces, unit placement, and ceiling opening requirements.
Thermostat Positioning
Guidance on locating the thermostat for optimal temperature control.
Installation Steps
Hanger Bolts and Installation Guide
Installing hanger bolts and using the installation guide for unit placement and leveling.
Condensate Piping and Duct Collars
Connecting condensate piping and attaching duct collars to the unit chassis.
Wiring Procedures
General Wiring and Electrical Data
Wiring practices, safety codes, and electrical specifications for unit connection.
Terminal Connections and Disconnect Switch
Details on terminal strip connections and the factory-installed disconnect switch.
Pre-Start Up Procedures
Pre-Start Checks
Important checks to perform after installation is complete before unit operation.
Operation
Unit Control Functions
Covers On/Off, Fan Speeds, Modes, Temperature Setpoint, Clock, Timer, and Battery Replacement.
Controls and Functions
Jumper Link Settings
Configure control features using jumper links on the microprocessor controller PCB.
Control Logic and Alarms
Details fan operation, temperature control, power failure, and alarm conditions.
Maintenance
Maintenance Schedule and Filter Care
Recommended tasks for optimal performance, including filter cleaning.
Recommended Spares
Suggests keeping one complete set of air filters on hand for use as needed.
Disassembly Procedure
Fan and Condensate System Removal
Steps for removing the fan assembly, condensate tray, and condensate pump.
Troubleshooting
Unit Operation Issues
Troubleshooting for unit not operating, fans not running, no cooling, and condensate problems.
Heating and Leak Issues
Diagnosing no heating, electric overheat, and water leaking problems.
Replacement Parts
Ordering Replacement Parts
Information on how to quote unit type and serial number when ordering parts.
Need help?
Do you have a question about the AirStream 42WKN20 and is the answer not in the manual?
Questions and answers