Carrier AIRSTREAM 42WKN, Installation, Operation And Maintenance Instructions

Page: 1 / 44

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53420008-01 Printed in U.S.A. Form 42WKN-7SI Pg 1 4-13 Replaces: 42WKN-6SI
Installation, Operation and Maintenance
Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . .1,2
INSPECTION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
CONTROLS DESCRIPTION . . . . . . . . . . . . . . . . . . . . 7-18
Microprocessor Control Board
. . . . . . . . . . . . . . . . . . . 7
Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
External Connections
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Microprocessor PCB Battery . . . . . . . . . . . . . . . . . . . . . 7
Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Optional Pendant
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Infrared Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Self Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Receiver Indicators
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Unpack Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Blank Off Pieces
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Ceiling Opening Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Positioning the Electro-Mechanical
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-31
Hanger Bolts
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Installation Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
• INSTALLATION GUIDE SETUP
Condensate Piping
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Duct Collars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Piping Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Piping Insulation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Wiring
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Terminal Strip Connections . . . . . . . . . . . . . . . . . . . . . 21
Fascia Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Pendant Assembly Installation
. . . . . . . . . . . . . . . . . . 31
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31-33
Pre-Start Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Control Circuit Checks
. . . . . . . . . . . . . . . . . . . . . . . . . . 31
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 33
• ELECTRO-MECHANICAL CONTROLS
• MICROPROCESSOR CONTROLS
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Cool Only Mode Settings . . . . . . . . . . . . . . . . . . . . . . . . 33
Heat Only Mode Settings
. . . . . . . . . . . . . . . . . . . . . . . . 33
Auto Mode Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Setting the Current Time . . . . . . . . . . . . . . . . . . . . . . . . 33
Programming the Unit
. . . . . . . . . . . . . . . . . . . . . . . . . . . 33
• SETTING THE WEEKDAYS TIME PROGRAM
(Monday through Friday)
• SETTING THE SATURDAY TIME PROGRAM
• SETTING THE SUNDAY TIME PROGRAM
CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Setting Jumper Links
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Software Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Main Control Functions . . . . . . . . . . . . . . . . . . . . . . . . . 34
Page
• INDOOR FAN OPERATION
• BOOST HEAT
• TEMPERATURE CONTROL
• POWER FAILURE
• BATTERY BACKUP
Alarms
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
• ELECTRIC HEATER OVERHEAT PROTECTION
• HIGH CONDENSATE LEVEL ALARM
NETWORK OPTION — MICROPROCESSOR
CONTROLLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34,35
Master/Slave Operation . . . . . . . . . . . . . . . . . . . . . . . . . 34
Network Connection
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . 35
• EVERY 3 MONTHS
• EVERY 6 MONTHS
• EVERY 12 MONTHS
Filter Removal and Cleaning
. . . . . . . . . . . . . . . . . . . . . 35
Recommended Spares . . . . . . . . . . . . . . . . . . . . . . . . . . 35
DISASSEMBLY PROCEDURE . . . . . . . . . . . . . . . . . .35,36
Fan Removal
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Condensate Tray Removal . . . . . . . . . . . . . . . . . . . . . . . 36
Condensate Pump Removal . . . . . . . . . . . . . . . . . . . . . 36
TROUBLESHOOTING
. . . . . . . . . . . . . . . . . . . . . . . . 36-38
REPLACEMENT PARTS . . . . . . . . . . . . . . . . . . . . . . 39-41
SAFETY CONSIDERATIONS
Installing and servicing air-conditioning equipment can be
hazardous due to system pressure and electrical components.
Only trained and qualified service personnel should install and
service air-conditioning equipment.
Untrained personnel can perform basic maintenance, such
as cleaning and replacing filters. All other operations should be
performed by trained service personnel. When working on
air-conditioning equipment, observe safety precautions in liter-
ature and on tags and labels attached to the unit.
1. The equipment has been designed and manufactured to
meet international safety standards but, like any mechani-
cal/electrical equipment, care must be taken to obtain the
best results.
2. Service and maintenance of this equipment should only
be carried out by skilled personnel.
3. When working with any air-conditioning unit, ensure that
the electrical disconnect supplying the unit is switched off
prior to servicing or repair work and that there is no pow-
er to any part of the equipment.
4. Also ensure that there are no other power feeds to the unit
such as fire alarm circuits, building management system
(BMS) circuits, etc.
AIRSTREAM™
42WKN08-36
Hydronic Ceiling Cassettes