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38AN,BK
with 40QN009,012
Cooling Only/Heat Pump Systems
Installation, Start-Up an
Service Instructions
(For Use in High Wall Applications)
CONTENTS
Page
SAFETY CONSIDERATIONS ................... 1
GENERAL .................................. 1,2
INSTALLATION ............................. 2-13
Step 1 - Complete Pre-lnstallation Checks .... 2
• UNPACK UNIT
• INSPECT SHIPMENT
Step 2 - Select Location ..................... 2
Step 3 - Mount Mounting Bracket on Wall .... 3
Step 4 - Mount Outdoor Section ............. 9
Step 5 - Connect Refrigerant Piping ........ I0
• RIGHT REAR AND BOTTOM PIPING
CONNECTIONS
• RIGHT SIDE PIPING CONNECTIONS
• LEFT SIDE PIPING CONNECTIONS
• ALL TYPES PIPING CONNECTIONS
Step 6 - Make Piping Connections .......... 10
Step 7 - Connect Condensate Drain Line .... ll
Step 8 - Make Electrical Connections ....... 11
• INDOOR SECTION WIRING
• OUTDOOR SECTION WIRING
Step 9 - Install Fan Coil Unit Onto
Mounting Bracket ......................... 13
START-UP ................................ 14-17
40QN Control System ....................... 14
Wireless Remote Controllers ................ 14
After Extended Shutdowns .................. 14
Seasonal Changeovers ...................... 14
To Turn the Unit On and Off ................. 14
Adjusting Airflow ........................... 14
Operating Mode Memory .................... 14
Automatic Operation (Auto) Mode ............ 14
Operating Fault Diagnosis ................... 15
Microprocessor Control Operation ........... 15
CLEANING AND MAINTENANCE ............ 18-19
Lubrication ................................. 18
To Install or Replace Remote Controller
Batteries ................................. 18
To Set the Current Time ..................... 18
To Remove and Clean or Replace Air Filters .. 18
• TO REMOVE AIR FILTERS
• TO CLEAN OR REPLACE FILTERS
To Clean Indoor Unit Front Panel ............ 19
To Clean Indoor Coil ........................ 19
To Clean Outdoor Coil (Outdoor Unit) ........ 19
To Clean Condensate Drains ................. 19
SERVICE ................................... 20
Diagnostic Codes ........................... 20
System Tests ............................... 20
• THERMISTOR TESTS
• COMPRESSOR FAILURE
• REVERSING VALVE FAILURE (38BK Only)
Page
System Safeties and Interlocks .............. 20
• INDOOR FAN FAILURE
• COMPRESSOR SHORT-CYCLING PROTECTION
• INDOOR COIL FREEZE PROTECTION
• INDOOR COIL HIGH-TEMPERATURE
PROTECTION
TROUBLESHOOTING ...................... 20-27
START-UP CHECKLIST ............... CL-I, CL-2
SAFETY CONSIDERATIONS
Installing and servicing air-conditioning equipment can be
hazardous due to system pressure and electrical compo-
nents. Only trained and qualified service personnel should
install or service air-conditioning equipment.
Untrained personnel can perform basic maintenance func-
tions such as cleaning coils and filters and replacing filters.
All other operations should be performed by trained service
personnel.
When working on air conditioning equipment, observe pre-
cautions in the literature and on tags and labels attached to
unit. Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for brazing operations. Have
fire extinguisher available. Before installation, read these in-
structiens thoroughly. Consult local building codes and Na-
tional Electrical Code (NEC) for special installation
requirements.
Electrical shock cancause personal injury or death. Be-
fore installing or servicing system, be sure to turn off
main power to system. There may be more than one dis-
connect switch. Turn off indoor fan coil power as
applicable.
GENERAL
The Carrier 40QNHOI 2 heat pump high wall fan coil unh
(Fig. 1) comes with supplemental electric heat (40QNE009
heat pump fan coil unit does not have electric heat). If your
application requires heating, heat pump units must be used
both outdoors and indoors. See Table 1 for recommended
system combinations.
The matched cooling and heat pump systems consist of an
outdoor section (condensing unit or heat pump) and an in-
door section (fan coil). The outdoor section (38AN or 38BK)
is installed alongside the building structure. It can also be
installed on a flat roof, deck, or on an apartment building
balcony. The indoor section (40QNB009,012 or 40QNE009,
40QNH012) is mounted high on an interior wall that is con-
venient for piping connection to the outdoor section. Two
sizes are available: 9,000 and 12,000 Btuh cooling capaci-
ties. See Fig. 1 for system components, Table 1 for system
ManuPacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4 PC 111 Catalog NO. 535-848 Printed in U.S.A. Form 38A,BI40Q-1SI Pg 1 5-99 Replaces: 53AN,BK-1SI