Page 1
Installation, Start-Up an
Service Instructions
(For Use in High Wall Applications)
CONTENTS
Page
SAFETY CONSIDERATIONS....
GENERAL
INSTALLATION
......................................
.............................................
Step 1 - Complete Pre-Installation Checks ...
• UNPACK UNIT
• INSPECT SHIPMENT
Step 2 - Select Location
.......................................
Step 3 - Mount Mounting Bracket on Wall ...
Step 4 - Mount Outdoor Section
Step 5 - Connect Refrigerant Piping
• RIGHT REAR AND BOTTOM PIPING
CONNECTIONS
• RIGHT SIDE PIPING CONNECTIONS
• LEFT SIDE PIPING CONNECTIONS
• ALL TYPES PIPING CONNECTIONS
Step 6 - Make Piping Connections
..........................
..................
......................
Step 7 - Connect Condensate Drain Line
Step 8 - Make Electrical Connections
• INDOOR SECTION WIRING
• OUTDOOR SECTION WIRING
................
Step 9 - Install Fan Coil Unit Onto
Mounting Bracket
..............................................
START-UP ...................................................
40QN Control System
Wireless Remote Controllers
After Extended Shutdowns
Seasonal Changeovers
To Turn the Unit On and Off
...............................
...................
......................
.............................
.....................
Adjusting Airflow .......................................
Operating Mode Memory
Automatic Operation (Auto) Mode
Operating Fault Diagnosis
Microprocessor Control Operation
..........................
...........
........................
..........
CLEANING AND MAINTENANCE......................18-19
Lubrication
............................................................
To install or Replace Remote Controller
Batteries .............................................................18
To Set the Current Time
.......................................
To Remove and Clean or Replace Air Filters .. 18
• TO REMOVE AIR FILTERS
• TO CLEAN OR REPLACE FILTERS
To Clean Indoor Unit Front Panel
.......................
To Clean Indoor Coil .............................................19
To Clean Outdoor Coil (Outdoor Unit) ................19
To Clean Condensate Drains
SERVICE
Diagnostic Codes
........................................................
..........................................
...............................
System Tests..................................................
• THERMISTOR TESTS
• COMPRESSOR FAILURE
• REVERSING VALVE FAILURE (38BK Only)
.. I
. 1,2
.2-13
_____
14-17
.. 14
.. 14
.. 14
.. 14
.. 14
.. 14
.. 14
,. 14
.. 15
.. 15
18
18
19
19
.20
.20
.20
.2
.3
.9
10
10
11
11
13
38AN,BK
with 40QN009,012
Cooling Only/Heat Pump Systems
Page
System Safeties and Interlocks ..........................
• INDOOR FAN FAILURE
• COMPRESSOR SHORT-CYCLING PROTECTION
• INDOOR COIL FREEZE PROTECTION
• INDOOR COIL HIGH-TEMPERATURE
PROTECTION
TROUBLESHOOTING ..
START-UP CHECKLIST
..........
.CL-1, CL-2
SAFETY CONSIDERATIONS
Installing and servicing air-conditioning equipment ean 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
structions thoroughly. Consult local building codes and Na
tional Electrical Code (NEC) for special installation
requirements.
A WARNING
Electrical shock can cause personal injuiy 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 olf indoor fan coil power as
applicable.
GENERAL
The Carrier 40QNH012 heat pump high wall fan coil unit
(Fig, 1) comes with supplemental electric heat (40QNE009
heat pmnp 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
.20
20-27
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obiigations.
Book|1 |4 PC 111 Catalog No. 533-848 Printed In U.S.A. Form 38A.B/40Q-1SI Pg 1 5-99 Replaces; 53AN,BK-1 SI
Tab 3e 2f
Page 2
combinations, and Table 2 for application range. Refer to
this manual for proper installation of the complete system.
Refer to Table 1 to make sure the correct indoor unit is in
stalled with the correct outdoor unit. Be sure the unit will be
operated within the application guidelines shown in Table 2.
When installing the 38AN or 38BK unit, it is important to
note that for cooling operation when the outdoor air tem
perature is below 55 F, it is necessary to equip the outdoor
unit with the low-ambient accessory.
To install this unit you will need:
1 — 40QNB or 40QNE/H Fan Coil unit with standard wire
less remote controller and indoor unit wire
1 — 38AN or 38BK. Outdoor Unit
1 — Low-Ambient Kit (if required for your application)
NOTE: Field-supplied wire, drain pipe, refrigerant tubing,
etc., are also required to install unit.
The installation materials provided are for use on instal
lations where the indoor section is mounted to gypsum wall
board with wall studs. Other types of applications require
field-supplied mounting hardware. Be sure to follow all in
stallation instructions in this manual carefully in order to achieve
proper unit operation, and be sure that you have all of the
required parts before beginning installation.
Note that the cooling only and heat pump systems utilize
a microprocessor control system to deliver optimum levels
of comfort and efficiency. Refer to Microprocessor Control
Operation section on page 15 for details.
Table 1 — System Combinations for Indoor
and Outdoor Units
SYSTEM
High Wall Cooling Only
High Wall Heat Pump
NOTE: A cooling only outdoor unit may not be matched with a heat
pump indoor unit, a heat pump outdoor unit may not be matched with
a cooiing only indoor unit. Do not mismatch systems.
INDOOR
UNIT
40QNB009
40QNB012
40QNE009
40QNH012
OUTDOOR
UNIT
38AN009
38AN012
38BK009
38BK012
INSTALLATION
Step 1 — Complete Pre-Installation Checks
UNPACK UNIT(S) — Store unit{s) in original packaging
until moved to the final site for installation. When removing
unit from carton, lift by its 4 comers. Note that there is a
plastic bag containing mounting screws taped to the mount
ing bracket.
INSPECT SHIPMENT — Upon receipt of shipment, in
spect unit (Fig. 1) for damage. Forward claim papers di
rectly to the transportation company. Manufacturer is not re
sponsible for damage incurred in transit.
Check all items (see Table 3), and if any item is missing,
notify your Carrier distributor. To prevent loss or damage,
leave all parts in the original packages until installation.
NOTE: The expansion device is located in outdoor unit.
Step 2 — Select Location — Consult local building
codes and NEC for special installation requirements.
NOTE: There are several ways the unit may be installed in
different types of wall construction. These instructions do
not cover all installation methods. As a typical installation,
these instructions focus primarily on mounting the unit to
wall studs in new construction.
Plan your installation carefully before you begin. Listed
below are some guidelines to follow when determining a lo
cation for the unit;
1. Center unit (horizontally) on the wall selected.
2. Allow sufficient space for airflow clearance, wiring, re
frigerant piping, and servicing the unit. See Fig. 2-4.
3. Place the unit so it faces normal location of room
occupants.
Table 2 — Application Range
COOLING
Maximum Minimum
Indoor Outdoor Indoor Outdoor
95 F DB
71 F WB
Indoor Outdoor Indoor
80 F DB
71 F WB
LEGEND
DB — Dry Bulb
WB — Wet Bulb
'Unit may be equipped with a low-ambient control that will allow op
eration down to —20 F.
115 F DB 67 F DB
Maximum Minimum
75 F DB
65 F WB
57 F WB
HEATING
55FDB 0° F DB
55 F DB*
Outdoor
TYPICAL FAN COL UNIT
TYPICAL OUTDOOR UNIT
Fig. 1 — Typical Cooling Only/
Heat Pump System
Page 3
*A clearance of 31^" is the absolute minimum, A clearance of 10” is
recommended.
NOTE: Remove unit front cover for controi box access.
Fig. 2 — Minimum Required Fan Coil Unit
Clearances
4, Select walls that are;
a. Strong enough to support the weight of the unit (see
Tables 4A-4D for unit operating weight).
b. Accessible to convenient condensate drainage.
c. Free of obstacles that may block air circulation to the
fan coil.
d. Outside walls (if possible) to make piping easier,
5. Place top of fan coil unit as high on wall as possible, mak
ing sure that unit is at least 3 ’/i in. down from ceiling to
permit proper airflow (the recommended clearance is
10 inches). Also, make sure that the unit is not placed
directly over anything that would prevent filter removal
or block airflow.
6, Make sure units are easily accessible to electric power.
7. Reirigerant piping can enter the unit through the prepunched
holes. Refrigerant piping can run down along the wall, to
the right or left along the wall, straight through the wall,
or into the wall (recommended location: right rear).
See Fig, 5, Once the piping is through the wall, it can run
inside walls, in ceilings, between floors, or straight to
the outside. See Fig. 6 for maximum line lengths. See
Table 5 for System Piston Guide and Refrigerant
Charging.
NOTE: Run refrigerant piping as directly as possible, and
avoid any unnecessary turns or bends.
8. Condensate piping can be directed through the inside wall
to an approved drain or directed straight outside,
NOTE: The piping hole for condensate line must be made
at a downward slope to ensure proper drainage. See Mount
Mounting Bracket on Wall section below for details.
Step 3 — Mount Mounting Bracket on Wall
1. Decide how refrigerant will be piped. If necessary, knock
out the appropriate pre-punched holes (Fig. 5) on unit for
piping and electrical connections.
2. Remove bracket from fan coil unit by pulling it down
from fan coil unit bottom as shown in Fig, 7.
3. Using a carpenter’s level, fasten mounting brackets into
the studs in the wall at least 10 in. away from the ceiling
with all the screws provided. Always be sure to insert screws
into the top 2 holes indicated in Fig, 7. Make sure the
attached bracket will support a 200 Tb vertical load. For
a masonry wall, anchor shields can be used to attach bracket
to the wall.
4. Temporarily hang unit on bracket to check location and
level.
A CAUTION
If mounting bracket is not mounted level, the indoor sec
tion will be mounted unevenly, and condensate drain
age water may drip onto the floor. Also, a gap between
the bracket and the wall may result in vibration and noise
from the indoor section.
5. Mark and cut condensate and piping holes.
a. For piping through the wall, mark the wall below the
condensate connection and cut a 2'/i-in. hole into the
wall at either point “A” or point “B” in Fig. 8.
NOTE: The 2’/2-in hole must be made at a downward
slope to ensure proper condensate drainage. See
Fig. 9. Slope condensate line at a minimum pitch of
'A in, per foot of line. The condensate line cannot be
run up for upper piping connections — only refriger
ant lines may be run up.
b. Push the wall sleeve (factory supplied with the xmit)
through the 2‘/2-in. wall opening.
Table 3 — High Wall Unit Package Contents
ITEM QUANTITY
Unit Mounting Template
Unit Mounting Bracket 1
1-in. Lag Screws for Unit Mounting
Hollow Wall Anchor Bolts for Unit Mounting 5
Wall Sleeve with Wall Cap
Infrared Wireless Remote Control 1
AAA Batteries (for Remote Control)
Remote Control Mounting Bracket 1
ya-in. Lag Screws for Remote Mounting Bracket 2
35 ft High Voltage Power Wiring
40QNB009 (3-Wire with Ground)
40QNEQ09 (2-Wire with Ground) 1
40QNB012 (2-Wire with Ground) 1
40QNH012 (2-Wire with Ground)
35 ft High Voltage Control Power Wiring (3-Wire) 1
35 ft Low Voltage Thermistor Wiring 1
Owner’s Manual 1
Installation Instructions
Warranty Registration Card
1
8
1
2
1
1
1
1
Page 4
Table 4A — Physical Data, 38AN Cooling Only Condensing Units*
UNIT 3SAN 009 012
NOMINAL CAPACITY (Tons) %
OPERATING WEIGHT (lb) 55
REFRIGERANT TYPE R-22
Control (Cooling)
Factory Charge (lb) 1.5 1.8
COMPRESSOR TYPE
Model
Oil (Recharge) (oz) 10.1 10.1
Crankcase Heater
Accumulator Yes
OUTDOOR FAN Propeller, Direct Drive
Rpm 850 850
Diameter (in.)...No. of Blades 12y4...4 12У4...4
Motor Watts 87 87
Nominal Air Cfm
OUTDOOR COIL
Face Area (sq ft)...No. of Rows 3.5...1 3.5...2
FIns/in. 18 17
CONTROLS
Fusible Plug (F) 210 210
Control Voltage 115 230
REFRIGERANT LINES
Connection Type Male Flare
Liquid Line OD (in.) У4 '/4
Vapor Line OD (in.t
Maximum Length (ft)
Maximum Lift Fan Coil (Above Outdoor) (ft)
Maximum Lift Fan Coil (Below Outdoor) (ft) 30 30
‘These units may only be used with 40QNB009,012 fan coil units.
Table 4B — Physical Data, 40QNB Cooling Only High Wall Units
UNIT 40QNB
NOMINAL CAPACITY (Tons) n 1
NOMINAL SIZE (Btuh)
OPERATING WEIGHT (lb) 18.7 24.2
MOISTURE REMOVAL RATE (Pints/Hr)
FINISH
REFRIGERANT R-22
Control (Cooling)
Factory or System Charge (ib)t 1.5 1.8
INDOOR FAN
Rpm...Cfm High
Rpm...Cfm Medium
Rpm...Cfm Low
Motor Watts 34
Biowers — No. ...Size (in.) 1...3.54 X 27.75 1...3.94X 27.75
INDOOR COIL
Face Area (sq ft)
No. of Rows
Finsfin.
Circuits 2
FILTERS
(Quantity) Size (in.) (2) 9x 12
AIRSWEEP
Horizontai Manual
Vertical Automatic
CONTROLS
Remote Controller
Freeze Protection
Auto. Restart
Diagnostics
Timer Mode 24-Hour Startup/Shutdown Type
Test Mode
Dehumidification Mode Yes
Fan Mode Hig h/Medium/Low/Auto.
Control Voltage 115 V 230 V
REFRIGERANT LINES
Connection Type
Liquid Line OD (in.) W
Vapor Line OD (In.) 14
Maximum Len^h (ft)
Maximum Lift Fan Coil (Above Outdoorl (ft)
Maximum Lift Fan Coll (Below Outdoor) (ft)
CONDENSATE DRAIN CONNECTION (in.) OD, Vie ID
•Units may only be matched with 38AN outdoor units.
tFull factory charge shipped in outdoor unit. Charge is determined based on 25 ft of line.
1
62
Capillary Tube
EAA090111A
750 750
009* 012*
9000 12,000
2.4 3.4
1200...240 1040...260
1100...210 940...240
1000...180 850...210
1.45 1.6
2 2
18 17
35 35
16 16
30 30
Carrier Hernietic Rotary
None
Copper Tube, Aluminum Fin
35 35
16 16
White
Capillary Tube in Outdoor Unit
Direct Drive Centrifugal
Copper Tube, Aluminum Fin
Cieanable
integrated Microprocessor
Wireless
Yes
Yes
Yes
Yes
Male Flare
E8B120111A
35
(2) 914 X 13W
14
3
'4
Page 5
Table 4C — Physical Data, 38BK009.012 Outdoor Heat Pump Units*
UNIT 38BK
NOMINAL CAPACITY (Tons)
OPERATING WEIGHT (lb)
REFRIGERANT TYPE R-22
Control (Cootingt
Control (Heating)
Factory Charge (lb) 1.5 2.0
COMPRESSOR TYPE Carrier Hermetic Rotary
Model
Oil (Recharge) (oz) 10.1 10.1
CRANKCASE HEATER (Watts) 40
OUTDOOR FAN Propeller, Direct Drive
Rpm
Diameter (in.)...No. of Blades 12'^...4 12'/4...4
Motor Watts
Nominal Air Cfm 756 756
OUTDOOR COIL
Face Area (sq ft)...No. of Rows 3.5...1 3.5...2
Fins/ln. 18 17
CONTROLS
Fusible Plug 210 F 210 F
Accumulator Yes
Defrost Method Demand Demand
Control Voltage 115 V 230 V
REFRIGERANT LINES
Connection TVpe Male Flare
Liquid Line OD (in.) V4 V4
Vapor Line OD (in.) W
Maximum Length (ft)
Maximum Lift (Fan Coll Above) (ft)
Maximum Lift (Fan Coll Below) (ft) 30
•These units may only be used with 40QNE/H fan coil units.
009 012
V* 1
60.7
AccuRater® Piston at Outdoor Unit
AccuRater Piston at Outdoor Unit
EBA095111H EBC130111H
850 850
87 87
Copper Tube, Aluminum Fin
35 35
16 16
66.5
Yes
30
Page 6
Table 4D — Physical Data, 40QNE/H Heat Pump High Wall Units
UNIT
NOMINAL CAPACITY (Tons) % 1
NOMINAL SIZE (Btuh)
OPERATING WEIGHT (lb) 18.7 24,2
MOISTURE REMOVAL RATE (PInts/hr)
REFRIGERANT
Control (Cooling)
Control Seating)
Factory Charge (lb)t
INDOOR FAN Direct Drive Centrifugal
RpmyCfm High 1200/240 1040/260
RpnrVCfm Medium 1100/210 940/240
Rpm/Cfm Low 1000/180 850/210
Motor Watts
Blowers Quantity...Size (in.)
INDOOR COIL
Face Area 1.45 1.6
No. of Rows
Fins/in. 18 17
Circuits 2 3
FILTERS Cieanabie
Quantity...Size (in.) 2...9X 12 2...91/4X 13V4
AIRSWEEP
Horizontal Manual
Vertical Automatic
CONTROLS
Remote Controller Options
Diagnostics Yes
Defrost Method Demand Defrost
Timer Mode Yes
Warm Start Feature Yes
Test Mode
Freeze Protection
Dehumidification Mode Yes
Fan Mode High/Medium/Low/Auto
Auto Changeover Yes
Auto Restart
Control Voltage
REFRIGERANT LINES
Connection Type Male Flare
Liquid Line OD (in.) W
Vapor Line OD (in.) Vi
Maximum Length (m
Maximum Lift (Fan Coil Above) (ft)
Maximum Lift (Fan Coil Below) (ft)
CONDENSATE DRAIN SIZE (in.) % OD, Vie ID
'These units may oniy be matched with 38BK outdoor units. The 40QNH unit available in size 012 only.
tFuil factory charge is shipped in the outdoor unit. The charge is determined based on 25 ft of line.
_......
40QNE009* 40QNH012*
9000 12,000
2.4 3.4
Accu Rater® Piston at Outdoor Unit
...
............
_..15
1...3.54 * 27.75
AccuRater Piston at Outdoor Unit
..................
34 35
Copper Tube, Aluminum Fin
2 2
115 V
35 35
16 16
30 30
R-22
...............
Integrated Microprocessor
Wireless
Yes
Yes
Yes
2.0
1...3.94 X 27.75
230 V
Page 7
\_P'-eiM^J
¡»«OUT Vltw
NOTES;
1. Dimensions in ( ] are in miliimelers.
2. Direction of airflow.
Center of Gravity.
4. Minimum dearances: 4 in. on coil sides, 24 in. on fan side, and
30 in. service side.
* [235] ^
Fig. 3 — 38AN/BK Dimensional Drawing
rop Vltw
>ienT ti»i vn*
UNIT
38
AN009 55.0 25.0
AN012 62,0 28.1
BKD09 60.7 27.5
BK012 66.5 30.2
WEIGHT
Lb
Kg
Page 8
[NL£T AIR
HiNIHUM CLEARANCE FOR SERVICE
2.36 OIA 160]
IRISHT SIDE VIEW I
EVAPORATOR
COIL
¿-KWCICOUT FOR LEFT SIDE
REFRIGERANT, DRAIN, POUER
AND SIGNAL LINES
INDOOR AIR BLOWER WHEEL
NOTES:
1. Dimensions are in inches. Dimensions in [ ] are in miliimeters.
I BOTTOM VIETI
2. Direction of airflow.
3. Refrigerant, drain, and power connections may be made rear, left side or
right side.
4. Refrigerant ts metered by capillary tubes in the outdoor unit. Insulate both
refrigerant lines.
5. Clearances of ZW on top of and to the left of the fan coil unit are absolute
minimums, Clearances of 10" are recommended.
6. Do not insert a trap in condensate drain line. Drain is internally trapped.
Fig. 4 — 40QN Dimensional Drawing
INFRARED REMOTE OVERRIDE SWITCH
CBEHIND ACCESS COVER)
‘INDOOR FAN MOTOR
KNOCKOUT FOR BOTTOM
REFRIGERANT. DRAIN, POWER
AND SIGNAL UNES
UNIT
40QN
WEIGHT A B
Lb Kg in.
mm
009 18.7 8.5 33.46 850 11.02
012 24.2
11.0 36.61 930 11.81 300 7.28 185
KNOCKOUT FOR RIGHT SIDE REFRIGERANT, DRAIN, POWER
AND SIGNAL LINES
c
mm
in.
280
in. mm
6.29 160
8
Page 9
Table 5 — System Piston Guide and
Refrigerant Charges
as" MAX (FOR COOLING ONLY AND
HEAT PUMP SYSTEMS)
UNIT
Indoor Outdoor
40QNB009 38AN009
40QNB012 38AN012
40QNE009 38BK009
40QNH012 38BK012
'Charge is based on 25 ft of interconnecting tubing. Charge may need
to be added for longer tubing runs or when used with certain fan
coiis. Check unit namepiate for required charge. This is a totai sys
tem charge.
tNon-serviceabie Aeroquip piston.
POSSiBLE PIPiNG DIRECTIONS
INDOOR
PISTON
SIZE
Capillary Tube Capillary Tube 1.50
Capillary Tube Capillary Tube
32t
42t 42t
PREPUNCHED HOLES
OUTDOOR
PISTON
SIZE
30t
REQUIRED
SYSTEM
CHARGE
(lb)*
1.80
1.50
2.00
UNIT
GROUND-LEVEL
INSTALLATION
ROOFTOP
INSTALLATION
Fig. 6 — Maximum System Line Lengths
Step 4 — Mount Outdoor Section
1. If outdoor section is to be installed at ground level, mount
on a solid, level support pad one in. longer and one in.
wider than the outdoor section dimensions.
2. Provide sufficient clearance for airflow, wiring, refriger
ant piping, service and maintenance. Provide a minimum
clearance of 2 ft from obstructions in front of outdoor
section, 2 ft on outdoor coil side, and 2’/2 ft on electrical
and piping side. If more than one outdoor section is in
stalled, provide a minimum clearance of 2 ft between sec
tions. Position outdoor section so that water or ice from
roof cannot fall directly on unit.
NOTE: The outdoor section can be installed higher than,
lower than, or level with the elevation of the indoor
section. If outdoor section is mounted higher than the in
door section, the vertical distance between the 2 units
should not exceed 30 ft. If the outdoor section is installed
lower than indoor section, the vertical distance between
the units should not exceed 16 ft. See table below:
BOTTOM/REAR
PIPING
Fig. 5 — Fan Coil Unit Refrigerant Piping
MAXIMUM DISTANCE BETWEEN OUTDOOR UNITS
Outdoor Section Higher 30 Ft Maximum
Than Indoor Section (Vertical)
Outdoor Section Lower 16 Ft Maximum
Than Indoor Section (Vertical)
NOTE: Maximum system piping length between indoor and outdoor
units is 35 ft.
Fig. 7 — Fan Coil Unit Bracket Mounting (Size 009 Shown)
Page 10
'2 1/2" TYP
□IA
Fig. 8 — Wall Hole Location For Fan Coil Unit
Rear Piping (Size 009 Shown)
WALL SLEEVE
(FACTORY SUPPLIED)
(INDOOR SIDE) • WALL . (OLTTDOOR SIDE)
NOTE: Slope condensate line at a minimum pitch of V* in. per foot.
Fig. 9 — Piping Hole
Step 5 — Connect Refrigerant Piping — Refer
to Tables 4A-4D for correct piping sizes. The length of re
frigerant pipe depends on the unit placement and building
structure — run pipes as directly as possible. Piping lengths
must not exceed 35 ft of total run.
 CAUTION
DO NOT BURY MORE THAN 36 IN. OF REFRIG
ERANT PIPE IN THE GROUND. If any section of pipe
is buried, there must be a 6-in. vertical rise to the valve
connections on the outdoor unit. If more than the rec
ommended length is buried, refrigerant may migrate to
cooler, buried section during extended periods of unit
shutdown, causing refrigerant slugging and possible com
pressor damage at start-up.
If it has not yet been removed, remove indoor section front
panel by removing the Phillips head screws located at the
bottom of the air outlet. It may be necessary to rotate the
louvers to locate the mounting screws.
Make piping connections:
NOTE: Right rear piping connections are the preferred
configuration.
RIGHT REAR AND BOTTOM PIPING CONNECTIONS
1. Carefully separate the tubing and condensate drain tube
from the shipping brackets.
2. Be careful not to bend or kink the tubing. Gently rotate
the tubing 90 degrees.
3. Carefully position the indoor section onto the wall bracket.
Be sure the tubing and drain mbe are routed through the
piping hole in the wall.
4. Check that the indoor section is moxmted level to ensure
proper condensate drainage and to avoid possible water
damage. Be sure the drain tube is sloped toward the out
side and is not kinked or bent. Ensure that any drain ex
tension is made outside the wall.
RIGHT SIDE PIPING CONNECTIONS
1. Carefully remove the tubing and the condensate drain tube
from the shipping brackets.
2. Be careful not to bend or kink the tubing. Gently rotate
the tubing 180 degrees.
3. Using a hand tube bender, carefully bend the tube ends
until they coincide with the raceway opening.
4. Carefully position the indoor section onto the wall bracket.
Be sure the tubing and drain tube are routed through the
piping hole in the wall.
5. Check that the indoor section is mounted level to ensure
proper condensate drainage and to avoid possible water
damage. Be sure the drain tube is sloped toward the out
side and is not kinked or bent. Ensure that any drain ex
tension is made outside the wall.
LEFT SIDE PIPING CONNECTIONS
1. Place indoor unit on wall bracket.
2. Mark where the tube flare connection points end on the
wall.
3. Remove the indoor section from the wall bracket.
4. Route the interconnecting tubing and the drain tube ex
tension through the wall sleeve.
5. Using a hand tube bender, carefully bend the tubes until
they coincide with the position of the flare connection points
on the wall.
6. Secure indoor section to the wall bracket.
7. Connect the drain tube extension to the condensate drain
tube.
8. Carefully position the indoor section onto the wall bracket.
Be sure the tubing and the drain tube are routed through
the piping hole in the wall.
9. Check that the indoor section is mounted level, to ensure
proper condensate drainage and to avoid possible water
damage. Be sure the drain tube is sloped toward the out
side and is not kinked or bent. Ensure that any drain ex
tension is made outside the wall.
ALL TYPES PIPING CONNECTIONS
NOTE: After tubing is routed through wall sleeve, install the
factoiy-supplied w5l cap around tubing components and into
the 2Y2-in. hole. Do not fill air gaps yet with insulation or
caulking as this space is helpful when connecting tubing to
outdoor unit, and routing electrical power supply. Be sure to
fill air spaces after installation is complete.
IMPORTANT: All refrigerant lines must be insulated
because the refrigerant flow device is located in the
outdoor section.
Run liquid and suction refrigerant piping.
1. Run pipes as directly as possible, avoiding any unnec
essary turns and bends.
2. Suspend refrigerant pipes so that the insulation is not dam
aged and vibrations are not transmitted to the
structure,
3. Leave slack in refrigerant pipe between the structure and
the indoor and outdoor sections to absorb vibration.
Step 6 — Make Piping Connections
NOTE: The outdoor section must be connected to the indoor
section using field-supplied tubing.
To make coimections:
1. Unpack factory-supplied tubing package. Unwind tubing
carefully. Do not bend or kink tubing.
10
Page 11
2. Connect piping to the indoor section:
a. Shape tube with a tube bender so that the tube ends
coincide with flare connections.
b. Carefully remove the flare nut fitting from the indoor
section tubing.
c. Thoroughly clean all tubing connection points to pre
vent foreign matter from entering the refrigerant
circuit.
d. Thread the 2 fittings by hand, making sure the threads
fit smoothly and the flare seats evenly against the union.
e. Tighten the 2 fittings securely. If a torque wrench is
used, hold the union side with a wrench and tighten
the nut to the specified torque with torque wrench.
See Table 6 for proper tightening torque.
Table 6 — Flare Nut Tightening Torque
FLARE NUT TUBE TORQUE
SIZE (in.) DIAMETER (in.) (ft-lb)
y* V4 10-12
% 35-45
3. Connect piping to the outdoor section:
a. Carefully remove the flare nut from the service valves.
b. If necessary, shape the interconnecting tube with a tube
bender until the tube flare end coincides with the flare
connection on the service valves,
c. Carefully thread the flare nut onto the flare connection
point of the service valve.
d. Tighten the flare nut. See Table 6 for proper tighten
ing torque.
4. Refrigerant line purge procedure:
a. Remove the service valve caps.
b. Use a hex key wrench to carefully rotate the valve stem
of the suction service valve 90 degrees (one-quarter
turn). Leave the valve open for approximately 5 sec
onds, then return the valve to its closed position,
c. Purge refrigerant through the suction valve service port
for 5 seconds, following accepted refrigerant removal
procedure.
d. Rotate the valve stem of the liquid line service valve
^iproximately one-quarter turn counterclockwise. Leave
the valve open for approximately 3 seconds, then re
turn the valve to its closed position.
e. Inspect the refrigerant line connections for leaks using
soapy water or electronic leak detector.
f. If no leaks are found, open both valves. Reinstall ser
vice valve caps.
g. Thoroughly reinspect all joints and connections for re
frigerant leaks. Use soapy water or electronic leak de
tector.
h. Tape both insulated tubing lines together. Begin tap
ing from the bottom of the outdoor section to the point
where the tubing enters the wall. Do not tape too tightly
— this reduces the tubing insulation efficiency.
Step 7 — Connect Condensate Drain Line —
Observe all local sanitary codes when installing condensate
drains.
1. Connect drain lines by inserting a ys-in. ridged PVC pipe
over the drain connection fitting provided.
A CAUTION
The drain tube extension must be securely fastened
to the condensate drain. Failure to do so can result
in condensate water dripping onto the floor.
2. To ensure regular flow of condensate water, the drain pipe
should be pitched toward an open drain or sump at a down
ward slope of at least Li-in. per ft. Refer to Fig. 10.
IMPORTANT: Be sure the drain hose has no slack
which might form a trap. Do not insert a trap in the
drain line, the drain is internally trapped.
3. Insulate the condensate drain line where it is located in or
above an oceupied area with a condensate-proof mate
rial, such as polyurethane or neoprene.
Step 8 — Make Electrical Connections — Be sure
all field wiring complies with local building codes and NEC,
and that the unit voltage is within the limits shown in
Table 7. For units with electric heat option, see Table 8.
Contact local power company for correction of improper
line voltage. Check the unit rating plate for recommended
circuit protection device.
A WARNING
To avoid personal injury or damage to unit, do not make
electrical connections until all power sources are shut
down, locked out, and tagged off. Failure to do so could
result in personal injury or damage to unit.
A CAUTION
Operation of unit on improper line voltage constitutes
abuse and could affect warranty. Refer to Table 7 for
permissible operating limits. Do not install unit in sys
tem where voltage may fluctuate above or below per
missible limits.
NOTE: Use type NM (per NEC) power cable only (pro
vided) between indoor disconnect switch (if installed) and
indoor unit.
NOTE: Install branch circuit disconnect per NEC of ad
equate size to handle unit starting current. Locate diseonnect
within sight from and readily accessible from outdoor unit,
per Section 440-14 of NEC. Some codes allow indoor unit
to share disconnect with outdoor unit if disconnect can be
locked; check local code before installing in this manner.
A WARNING
According to NEC and most local codes, the unit must
have an uninterrupted, unbroken ground to minimize per
sonal injury if an electric fault should occur. The ground
may consist of electrical wire or metal conduit when in
stalled in accordance with existing electrical codes. Fail
ure to follow this warning could result in an electric shock,
fire, or death.
A CAUTION
Do not short circuit the transformer — it is fused. The
transformer can be short circuited by connecting the wrong
wires or by touching a live wire to the side of a grounded
control box.
INDOOR SECTION WIRING
1. Remove fan coil unit front cover.
2. Route ground and power wires using NM wire provided.
Remove the factory test leads connected to the power ter
minal block. These leads are for factory testing only and
cannot be used for power connections.
3. Route a 14-gage, 4-wire conductor (cooling only sys
tems) or two 14-gage, 3-wire conductors (heat pump sys
tems) through the power wiring hole in the control box.
NOTE: Connectors are factory supplied.
11
Page 12
INCORRECT
INCORRECT INCORRECT
Fig. 10 — Fan Coil Unit Drainage System (Rear Piping Shown)
Table 7 — Electrical Data
CORRECT
UNIT
Outdoor Section
38AN009 115-1 104 127
38AN012 208/230-1 187 253
38BK009 115-1 104 127
38BK012 208/230-1 187 253 30.0 5.8 .35 12.4
Indoor Section
40QNB009 115-1 104 127
40QNB012 208/230-1 187 253
40QNE009 115-1 104 127
40QNH012
FLA — Full Load Amps MOCP — Maximum Overcurrenl Protection Amps
LRA — Locked Rotor Amps RLA — Rated Load Amps
MCA — Minimum Circuit Amps
V-PH
(60 Hz)
208/230-1
LEGEND
VOLTAGE RANGE COMPRESSOR
Min Max LRA RLA
46.5 7.6 .76 12.1 15
30.0 5.5 .35 8.5 15
45.0 9.0 .76 11.2 15
187
253
Table 8 — Electric Heater Data
INDOOR UNIT
40QNH012
LEGEND
AWG — American Wire Gage
V-PH (60 Hz)
230-1 3.3 .75 14
INPUT AMPS kW AT 230 V MIN WIRE SIZE (AWG)
4. Wire the indoor units as follows:
• Cooling-Only, Size 009 Units:
Connect the black lead to terminal block location L.
Connect the white lead to terminal block location N.
Connect the bare copper ground lead to terminal block
location G. Connect the red lead to terminal block lo
cation 3. See Fig. 11,
• Cooling-Only, Size 012 Units:
Connect the black lead to terminal block location LI.
Connect the red lead to terminal block location L2. Con
nect the bare copper ground lead to terminal block lo
cation G. Connect the yellow lead to terminal block lo
cation 3. See Fig. 11.
• Heat Pump, Size 009 Units:
Connect the black lead to terminal block location L.
Connect the white lead to terminal block location N.
Connect the bare copper ground lead to terminal block
location G. Connect the yellow lead to terminal block
location 3, Connect the orange lead to terminal block
location 1. Connect the gray lead to terminal block lo
cation 2. See Fig. 11.
• Heat Pump, Size 012 Units:
Connect the black lead to terminal block location LI.
Connect the red lead to terminal block location L2. Con
5. Route the other end of the power cable through the wail
raceway. If required, run to indoor disconnect switch first.
6. Replace fan coil unit front cover.
OUTDOOR SECTION WIRING
IMPORTANT: Be sure to check local codes for any
field-supplied conduit which may be required.
1. Route ground and power wires.
2. Remove the cover to the electrical control compartment.
See Fig. 11.
3. Thread a threaded-type strain relief into the electrical sup
ply outlets.
4. Route the 14-gage, 4-wire conductor (cooling only sys
tems) or the two 14-gage, 3-wire conductors (heat pump
systems) from the indoor section through the upper elec
trical conduit connection of the outdoor unit.
5. Route a field-supplied, 3-wire, 14-gage power conductor
through the lower electrical conduit connection of the
nect the bare copper ground lead to terminal block
---
-
— —
— —
— —
FAN
FLA
.41
.23 —
.41
.23
MCA MOCP
15
___
— —
—
___
—
—
location G. Connect the yellow lead to terminal block
location 3. Connect the orange lead to terminal block
location 1. Connect the gray lead to terminal block lo
cation 2. See Fig. 11.
12
Page 13
outdoor unit. For installation simplicity, the fieldsupplied conductor should be black, white, and bare cop
per for 009 applications and black, red, and bare copper
for 012 applications.
6. Wire the outdoor units as follows:
• Cooling-Only, Size 009 Systems:
Connect the 2 black leads to terminal block location L.
Connect the 2 white leads to terminal block location N.
Connect the 2 bare copper ground leads to the terminal
block location G. Connect the red lead to terminal block
location 3. See Fig. 11.
• Cooling-Only, Size 012 Systems;
Connect the 2 black leads to terminal block location
LI. Connect the 2 red leads to terminal bloek location
L2. Connect the 2 bare copper ground leads to terminal
block location G. Connect the yellow lead to terminal
block location 3. See Fig. 11.
• Heat Pump, Size 009 Systems:
Connect the 2 black leads to terminal block location L.
Connect the 2 white leads to terminal block location N.
Connect the 2 bare copper ground leads to terminal block
location G. Connect the yellow lead to terminal block
location 3. Connect the orange lead to terminal block
location 1. Connect the gray lead to terminal block lo
cation 2. See Fig, 11.
• Heat Pump, Size 012 Systems:
Connect the 2 black leads to terminal block location
LI. Connect the 2 red leads to terminal block location
L2. Connect the 2 bare copper ground leads to terminal
block location G. Connect the yellow lead to terminal
block location 3. Connect the orange lead to terminal
block location 1. Connect the gray lead to terminal block
location 2. See. Fig. 11.
7. Connect the other end of the field-supplied 3-wire power
conductor to the branch circuit disconnect.
8, Replace access cover.
Step 9 —Install Fan Coil Unit Onto Mounting
Bracket
1. Hook the fan coil unit onto the top of the mounting bracket.
See Fig. 12.
2. Snap the fan coil unit onto the mounting bracket as shown
in Fig, 12,
IMPORTANT: An audible snapping sound will be
heard as the hook on the unit is secured into the
hole on the mounting bracket. Be sure unit is cor
rectly mounted.
TERMINAL BLOCK DETAL
(009 HEAT PUMP UNIT SHOWN)*
OUTDOOR UN rr
‘The 012 heat pump units have the following terminal block connec
tions: 1, 2,3, LI, L2, G. The cooling-only units are equivalent to their
respective heat pump units, except the cooling-only units do not have
terminal block connections 1 and 2.
Fig. 11 — Electrical Connections
TOP
CONNECTION CABLE
INDOOR AND OUTDOOR UNIT
HOOK
Fig. 12 — Mounting Fan Coil Unit to Bracket
13
Page 14
START-UP
Complete the following checks and the Start-Up Check
list on pages CL-1 and CL-2 before system start-up.
1. Check condensate drainage system. Refer to Fig. 4
and 10. Add water to check the drainage flow. If water
does not flow steadily, check the pipe slope or see if there
are any restrictions.
2. Make sure all wiring connections are correct and tight,
3. Be sure all barriers, covers, and panels are in place,
4. Ensure that the filters have been installed and that the air
discharge louvers are correctly positioned.
A WARNING
Never operate unit without a filter. Damage to the
unit could result.
5. Fully backseat (open) the liquid and vapor tube service
valves,
6. Unit is shipped with valve stems frontseated and caps fac
tory installed. Replace stem caps after system is opened
to refrigerant flow (backseated). Replace caps finger tight.
7. With the remote controller, turn on the unit and operate
in each mode (as applicable) for 15 minutes to test for
proper operation. Do not operate in Cooling mode if out
door temperature is below 55 F, unless unit is equipped
with low ambient control. Do not operate in Heating mode
(heat pump systems only) if the outdoor temperature is
above 75 F.
8. Test for proper refrigerant charge using the superheat method.
9. Explain basic system operation to the owner.
40QN Control System — The 40QN unit is equipped
with a microprocessor control which operates the system.
This control is located in the control box of the fan coil unit,
with thermistors located in the fan coil inlet and on the in
door coil. The 40QNE/H heat pump fan coil units also have
thermistors located on the outdoor coil and in the outdoor air
inlet. These thermistors monitor system operation and con
trol the operating mode. To change settings or modes of op
eration, use the factory-supplied infrared wireless remote
controller. This controller allows the fan coil imit to be op
erated from within the same room without any wire connec
tions to the unit.
Wireless Remote Controllers — A wireless remote
controller is supplied for system operation of all high
wall units. Each battery-operated wireless (infrared) remote
controller may be used to control more than one unit. The
wireless remote controller has a maximum range of 20 feet.
The fan coil unit is equipped with an emergency switch
which allows operation if the remote controller malfunc
tions or is misplaced. Because the controller uses infirared
REMOTE
COtiTROLLER
BRACKET
Fig. 13 — Mounting Remote Controller Bracket
communication, all of the following must be true for the con
troller to work properly;
1. The power must be on to the fan coil unit.
2. The batteries in the controller must be good.
3. The controller must be within range of and pointed di
rectly at the fan coil unit.
4. The fan coil unit’s 3-position switch must be set in the
remote position.
The remote controller includes a wall-mounted bracket.
To install the bracket, attach bracket to the wall as shown in
Fig. 13 using factory-supplied, double-sided tape. Install factorysupplied batteries into die remote controller per To Install or
Replace Remote Controller Batteries section on page 18, and
place the controller into the bracket so that it will be ready
for use.
After Extended Shutdowns — If the system has been
turned off for more than 12 hours, turn on the indoor and
outdoor unit discormect switches to supply power to the sys
tem for 12 hours BEFORE starting the system.
Seasonal Changeovers — When changing heat pump
system from cooling to heating or heating to cooling, or be
fore starting cooling only system after it has been out of use
for the winter season, perform the following steps
BEFORE starting the system:
1. Insftóct and clean the outdoor unit, particularly the coil.
2. Clean or replace the air filters in the indoor unit.
3. Clean the indoor unit drain pan and drain pipe, and re
move any obstructions.
4. Turn on the indoor and outdoor unit disconnect switches
to supply power to the system for 12 hours before start
ing the system.
To Turn the Unit On and Off — To turn the unit on,
press the orange ON/OFF button (see Fig. 14). Unit will start.
To stop unit operation, press the ON/OFF button again. Unit
will stop. Refer to Owner’s Manual enclosed witii the fan
coil unit for full remote control operating details.
Adjusting Airflow — The airflow direction may be ad
justed up and down using the remote controller, and from
side to side by manually moving the vents. For cooling only
units and heat pump units when in the cooling mode, set the
louvers to discharge straight out (parallel to the floor) (see
Fig, 15). For the heat pump units operating in Heating mode,
it is recommended that the air discharge louvers be set to
discharge vertically (see Fig. 15).
The Swing Range shown in Fig. 15 is the range which
will provide maximum occupant comfort in each mode. It is
recommended that the louvers be positioned within this range
(using the remote controller).
NOTE: The full swing range for the selected mode will au
tomatically be used if auto, fan mode is selected.
Opersting Mode Memory— After the system is turned
off or after a power failure, tiie system remains in the last
operating mode selected. When the system is turned back on
or when power is automatically restored, operation contin
ues in the same operating mode as when power shut down.
Automatic Operation (Auto.) Mode— if Auto, mode
is selected, the system automatically switches the operating
mode from heating (heat pump systems only) to cooling, or
from cooling to heating (heat pump system only) depending
on the selected temperature,
NOTE: Between the cooling cycle and the heating cycle there
is a neutral zone of approximately 2° F above and 2° F be
low the selected temperature when only the fan is
operating.
14
Page 15
COOLINO - DIRECT
LOUVERS SO AIR
tDesirable range.
NOTE: Unit is equippect with manuai air vents which direct the air
from side to side. Up and down louver motion can be selected using
the remote controller. For maximum comfort, set louvers within the
swing range. See Adjusting Airflow section on page 14 for more
information.
BLOWS DOWN
(VERTICAL
DISCHARGE)
Fig. 15 — Louver Adjustments
Operating Fault Diagnosis — The system includes
an automatic diagnosis feature which is activated under dif
ficult or unacceptable operating conditions. If such condi
tions occur, the system stops automatically, the operating fault
signal appears (green “UNIT ON” light on the front of the
fan coil unit flashes), and an analysis of the system operat
ing conditions is initiated. The system will then be restarted
automatically, as soon as normal conditions have been re
stored, or it will remain off. If the system does not start again,
the green “UNIT ON” light will flash an error code.
Microprocessor Control Operation — This sys
tem is controlled by a microprocessor designed to give op
timum levels of comfort and operating efficiency. The con
trol is located in the 40QN unit. To operate the unit, the factory-
supplied remote controller is required.
There are 9 (QNB systems) or 12 (QNE/H systems) op
erating modes (including the off mode) for the unit. Each
mode operates as follows:
• Off Mode — When the unit is in the Off mode, all func
tions (compressor, outdoor fan, indoor fan, and air sweep)
are off, except the reversing valve (QNE/H only), which
will stay deenergized if the unit was last operated in the
Cooling mode.
• Air Circulation Mode (Fan Operation Only) —- When Air
Circulation mode is selected, the indoor fan will operate
continuously in the selected speed (high, medium, low, or
auto.). If the Auto, mode is selected, the indoor fan will
operate at low speed. The compressor and outdoor fan are
off. The reversing valve (QNE/H only) will remain in the
last operating mode.
• Cooling Mode — When the Cooling mode is selected, the
indoor fan will operate continuously at the selected speed
if the speed is high, medium, or low. If the indoor fan is
in Auto, mode, the fan will change operating speeds de
pending on the difference between the room temperature
and the set point. The reversing valve (QNE/H only) will
be energized. The compressor cannot run for 3 minutes
from the time the system starts up or for 3 minutes from
the time the compressor last operated. When the tempera
ture of the room is equal to or greater than the selected
temperature, the compressor and outdoor fan will operate
until the room temperature is 2° F below the set point, and
then shut off. When the room temperature is less than the
selected temperature, the compressor and outdoor fan re
main off.
• Maximum Dehumidification Mode — When the Dehu
midification mode is selected, the indoor fan will operate
continuously at the selected speed if the speed is high, me
dium, or low. If the indoor fan is in Auto, mode, the fan
will change operating speeds depending on the room tem
perature, If the room temperature is below the set point,
the indoor fan will run at ultra-low speed, and the com
pressor could run for up to 4 minutes. (Ultra-low speed is
a control-driven speed [not user configurable] used to sample
the space when the fan would normally be off.) The re
versing valve (QNE/H only) will be energized. The com
pressor cannot run for 3 minutes from the time the system
starts up or for 3 minutes from the time the compressor
last operated.
Initial Operation — When the mode is first selected, one of
the following occurs:
1. If the room temperature is above or equal to the selected
temperature, the unit will operate for 16 minutes, and the
compressor and outdoor fan will operate. The indoor fan
will operate as in the Cooling mode. After 16 minutes of
operation (or when the room reaches 2° F below set point),
the unit switches to normal dehumidification operation.
2. If the room temperature is below the selected tempera
ture, the unit will operate for 8 minutes as follows: the
compressor and outdoor fan will operate for 3 minutes.
The indoor fan will operate in low speed, and 30 seconds
after the compressor stops, the indoor fan stops. The unit
remains off for 1 minute, and then the indoor fan starts in
ultra-low speed for 30 seconds. The unit then switches to
normal dehumidification operation.
Normal Operation — One of the following will take place:
1. When the temperature of the room is equal to or greater
than the selected temperature (by not more than 3° F), the
unit will operate for 8 minutes as follows: the compres
sor and outdoor fan will operate for 3 minutes. The in
door fan will operate in low speed, and 30 seconds after
the compressor stops, the indoor fan stops. The unit re
mains off for 1 minute, and then the indoor fan starts in
ultra-low speed for 30 seconds. The normal dehumidifi
cation operation is repeated for the newly sensed room
temperature.
2. If the room temperature is equal to or greater than the
selected temperamre, but not by more than between 4° F
and 6° F, the compressor and outdoor fan operate for
4 minutes. The indoor fan will run at ultra-low speed and
15
Page 16
will stop 30 seconds after the compressor stops. After
3 minutes, the indoor fan runs at ultra-low speed for
30 seconds. The normal dehumidification operation is re
peated for the newly sensed room temperature.
3. When the room temperature is equal to or greater than
4® F below the selected temperature, the system operates
as follows: The compressor and outdoor fan operate for
3 minutes. The indoor fan will operate at ultra-low speed
and will stop 30 seconds after the compressor stops. Af
ter 4 or 5 minutes, the indoor fan starts in ultra-low speed
for 30 seconds. The normal dehumidification operation is
repeated for the newly sensed room temperature. If the
room temperature is still 4° F below the selected tem
perature, the compressor, outdoor fan, and indoor fan re
main off. After IVi minutes, the indoor fan operates at
ultra-low speed for 30 seconds. The normal dehumidifi
cation operation is repeated for the newly sensed room
temperature.
• Heat Pump Heating Mode (Heat Pump Systems Only) —
When the Heat Pump mode is selected, the indoor fan will
operate at the selected speed if the speed is high, medium,
or low, unless overridden by the coil temperature (to pre
vent cold drafts). If the indoor fan is in Auto, mode, the
fan will change operating speeds depending on the differ
ence between the room temperature, the set point, and the
coil temperature. The reversing valve will be deenergized.
The compressor cannot run for 3 minutes from the time
the system starts up or for 3 minutes from the time it last
operated. When the temperature of the room is 8° F below
the selected temperature, the unit will operate in Heat Pump
mode until the temperature is 6° F above the selected tem
perature, or the compressor runs for 40 minutes (which
ever comes first). If the temperature of the room is less
than 7® F below or equal to the selected temperature, the
unit operates in Heat Pump mode until the selected set point
temperature plus 2° F is reached.
• Electric Heat in Heat Pump Heating Mode (40QNH012
Heat Pump Unit Only) — Supplemental electric heat is
enabled when the outside-air thermistor located in the out
door unit is below 40 F and the room temperature ther
mistor is equal to or less than 5.4° F below set point. Elec
tric heat will remain on until 1.8° F above set point, then
will turn off. Fan operation will be the same as described
previously in the heat pump heating mode.
NOTE: Electric heat control cannot be overridden.
• Demand Defrost Mode (Heat Pump Systems Only) — This
unit uses a demand defrost system to remove frost from
the outdoor coil during heating operation. The indoor and
outdoor fans are shut off during Defrost mode. See
Fig. 16. For 40QNH imits, the electric heat is off during
Defrost mode.
■ Sleep Mode — The Sleep mode timer turns the unit off
when the timer reaches zero minutes. The durations that
can be selected are 1, 2, 3, or 7 hours. After the initial
30 minutes, the user set point shifts approximtely 1 ° F warmer.
This sequence repeats itself every 40 minutes up to a total
of 150 minutes. When Sleep mode is enabled, the display
on the remote controller is dimmed.
• ON/OFF Timer Mode — The ON/OFF timer will turn the
unit on or off at a user selectable on and off time (this is
one time event only). The unit will start in the same mode
and at the same selected temperature as when the system
shut off. If the room temperature is not within approxi
mately 5° F of the set point 40 minutes before start-up, the
unit runs before the user selected on time is reached to
achieve the set point temperature at start-up.
• Automatic Operation Mode for Cooling Only Systems —
The unit samples the air in the room. Based on the room
temperature, the unit selects one of the following modes:
1. Cooling Mode — If the room temperature is more than
82.4 F with a preset temperature of 78.8 F.
2. Dry Mode — If the room temperature is more than
75.2 F and less than 82.4 F with a preset temperature
of 77 F.
3. Fan Only Mode — If the room temperature is less than
75.2 F.
The preset temperature can be changed by ±4° F using the
remote control.
• Automatic Operation Mode for Heat Pump Systems — The
operation mode will be determined after 20 seconds of room
monitoring (to determine the room temperature and the
outdoor-air temperature).
• Test Mode — The Test mode can be selected by setting
the slide switch on the fan coil unit to TEST position. The
slide switch is located on the front of the unit as shown in
Fig. 17, The fan coil unit will start immediately (there is
no compressor time delay when using Test mode) in Cool
ing mode with an infinitely low set point. The indoor fan
speed will be at the high setting, and the swing louvers
will be on (moving up and down).
NOTE; The unit cannot be controlled by the remote con
troller until the slide switch is returned to the REMOTE
position.
• Emergency Mode — This mode is only to be used if the
remote controller is lost, damaged, or the batteries are dischaiged. To initiate emergency mode, manually move the
slide switch on the fan coil unit to the EMER position
(Fig. 17). The unit is automatically operated in cooling or
heating (40QNE/H units only) mode according to room
temperature. Emergency operation settings are as follows:
1. Operation mode: AUTO.
2, Fan speed: AUTO.
3. Cooling set point: 77 F
4, Timer mode: Continuous
NOTE: The unit cannot be controlled by the remote con
troller until the slide switch is returned to the REMOTE
position.
16
Page 17
*A defrost will be initiated after 30 minutes of compressor run time if the outdoor
coil temperature is less than -4° F.
Fig. 16 — Electronic Control Defrost Regions Map
LEGEND
EMER — Emergency
Fig. 17 — Slide Switch
17
Page 18
CLEANING AND MAINTENANCE
A CAUTION
To avoid the possibility of electric shock, before per
forming any cleaning and maintenance operations al
ways turn off power to the system by pressing the
orange ON/OFF button on the remote controller. Turn
off the outdoor disconnect switch located near the out
door unit. If the indoor unit is on a separate switch, be
sure it is also disconnected.
F or proper system operation, perform the cleaning and main
tenance operations in Table 9.
Lubrication — The indoor-fan automatic air sweep mo
tor, and the outdoor-fan motor are factory lubricated and re
quire no oiling.
To Install
or Replace Remote Controller
Batteries
A CAUTION
Do not drop the remote controller — damage to the de
vice may result. Avoid getting the controller wet.
NOTE: Before replacing the batteries, note that the remote
controller signal can be affected if electronic fluorescent
lights are installed nearby. The batteries may not need to be
replaced. Tf you suspect this is the problem, consult your
Carrier distributor.
Batteries should be replaced once a year. Use 2 batteries
(1.5 V, dc-type, AAA alkaline batteries). Never use old or
recharged batteries together with new ones.
To replace batteries:
1. Slide the battery cover off from the back of the remote
controller. See Fig. 18.
2. Insert the 2 batteries in accordance with the markings
on the remote controller, so that the poles are correct
(+ and -).
3. Press the |RST| button using an instrument screwdriver
or similar small, pointed tool.
4. Replace the cover securely.
It is time to replace the remote controller batteries when
the remote controller function becomes irregular, or the sys
tem no longer responds to commands given close to the unit.
When shutting down the system for an extended period of
time, it is advisable to remove the batteries.
Consult distributor if any other equipment is turned on or
shows signs of disrupted operation if you use the wireless
remote controller, or if the system is turned on or shows signs
of disrupted operation when the remote controller of any other
equipment is used.
To Set the Current Time
1, Press the TA button (located on the back of the remote
controller; see Fig. 19) with an instrument screwdriver or
similar small, pointed tool, and the current time indica
tion symbol flashes.
Note that the controller comes preset from the factory set
for 6:00 a.m.
2. Set the current time with the hour and minute buttons on
the front of the remote controller (see Fig. 19) while the
current time indieation is flashing. Note that a.m. and p.m.
are also indicated as the times are scrolled through.
3. Press TA
again. The flashing will stop and the current
time will be reset to the new setting.
To Remove and Clean or Replace Air Filters
A CAUTION
Operating your system with dirty air filters may damage
the indoor unit and can also cause reduced cooling per
formance, intermittent system operation, frost build-up
on the indoor coil, and blown fuses. Inspect and clean
or replace the air filters monthly.
TO REMOVE AIR FILTERS;
1. Open fan coil unit front panel (lift). See Fig. 20.
2. Pull the filters down to remove.
TO CLEAN OR REPLACE FILTERS — Filters should be
vacuumed and washed with warm water (see Fig. 20). Shake
filter to remove any excess water, dry thoroughly, and re
place by sliding filter behind front grille until filter snaps in
place.
If the filter has begun to break down or is tom, it needs to
be replaced. Replacement filters are available through your
Carrier distributor.
NOTE: DO NOT put filters in the dishwasher.
Table 9 — Cleaning and Maintenance Schedule
TASK MONTHLY QUARTERLY
INDOOR UNIT
Clean Air Filters X
Clean Drain Pipe
Clean Condensate Drain Pan
Replace Batteries in the Remote Controller
Clean Indoor Unit Front Panel
OUTDOOR UNIT
Clean the Fins From Outside X
Open the Unit and Clean Fins Inside
Remove Dust From Electrical Parts
Check Electrical Connections are Tight
Clean Outdoor Fan
Check that Outdoor Fan Assembly is Tight
Clean Drain Pan
18
YEARLY
X
X
X
X
X
X
X
X
X
X
Page 19
To Clean Indoor Unit Front Panel — if the front
panel of the unit beeomes dirty or smudged, wipe the out
side of the front panel with a soft dry eloth. If necessary, use
a mild liquid detergent and wipe off carefully with a dry cloth.
A CAUTION
When cleaning the front panel, NEVER use water hot
ter than 105 F, and DO NOT pour water into the fan
coil unit. Do not use abrasive or petroleum based clean
ers — damage to unit appearance will result.
To Clean Indoor Coil — To clean the coil, remove in
door unit front panel, and vacuum the coil fins. Use care not
to bend or damage fins.
To Clean Outdoor Coil (Outdoor Unit)
A WARNING
Some metal parts and sharp fins of outdoor unit coil can
cause personal injury during cleaning. Clean coil
carefully.
To clean the outdoor coil:
1. Remove any dirt or obstruction from discharge opening.
2. Use garden hose to spray water on the coil. Debris that
collects between coil fins inhibits heat transfer — direct
the water spray between coil fins to flush out debris.
To Clean Condensate Drains — Clean all drains and
drain pans at the start of each cooling season. Check the flow
by pouring water into the drain.
REMOVE COVER INSERT NEW BATTERIES
NOTE: Be sure to Insert new batteries correctly (as shown).
Fig. 18 — Installing or Replacing Batteries
SET TIME
Fig. 19 — Setting the Current Time
PRESS |R^
REMOVE FILTER VACUUM CLEAN
Fig. 20 — Air Filter Maintenance
19
RINSE WITH WATER
Page 20
SERVICE
A WARNING
When servicing unit, turn off all electric power to unit
to avoid shock hazard or injury from rotating parts.
A CAUTION
Do not vent refrigerant to atmosphere when servicing
unit. Recover refrigerant during system repair or unit
removal.
Diagnostic Codes — This unit is equipped with a
microprocessor control which continuously monitors the op
eration of the unit. If an operational fault is detected, a fault
is indicated by the flashing of the green “UNIT ON” light
on the front of the fan coil unit. A red LED (light-emitting
diode) indicator light, located on the control board in the
control box of the indoor unit, will emit a flash code which
can be used to troubleshoot a system problem. The control
will continue to monitor the unit and, if the conditions which
cause the fault are cleared, the unit will return to norma! op
eration. If the fault code is present for 5 cycles of the unit,
the unit will be locked out and the alarm is indicated by the
flashing of the green “UNIT ON” light on the front of the
fan coil unit.
To access the LED indicator light, remove the front cover
of the unit by removing the 3 screws holding it in place.
If the LED indicator light continuously flashes on for one
second, then off for one second, the control is functioning
properly and no fault is present. A fast flashing LED indi
cates that a fault has been detected. Table 10 lists the num
ber of quick flashes and the associated fault. If the system
does not operate and the LED mdicator does not flash, either
the power is off to the control board or the control board has
failed.
System Tests — System tests listed below are per
formed continuously by the microprocessor. If a fault is
indicated, then the system allows only limited operation un
til the problem is resolved. If the problem resolves itself,
then the code is cleared and operation resumes.
TOERMISTOR TESTS — Each thermistor is tested for high
limit out of range (shorted condition) and low limit out of
range (open condition). If the thermistor is out of range, the
fault status indicator comes on and the LED flashes the ap
propriate fault code. Proper thermistor location and correct
temperature sensing are critical to unit operation. Good ther
mal contact is also required. Thermistor cable assemblies are
provided with fan coil units to run between indoor and out
door units. High-voltage and thermistor cable assemblies should
not touch each other, and cable runs may be extended up to
200 feet.
With unit miming, the thermistor integrity may be checked
by measuring the dc voltage across the two thermistor con
nections. Approximate temperature is indicated in Table 11.
COMPRESSOR FAILURE
If the System is in Cooling or Dehumidification Mode — Af
ter 5 minutes of operation, if the temperature of the indoor
coil is not 4° F less than at the time the call for cooling started,
then a compressor failure is indicated on the remote con
troller LCD display.
If the System is in Heat Pump Heating Mode (38BK only) —
After 5 minutes of operation, if the temperature indicated by
the outdoor coil thermistor is not 4° F less than at the time
the call for heating started, then a compressor failure is
indicated.
REVERSING VALVE FAILURE (38BK Only)
If the System is in Cooling or Dehumidification Mode — Af
ter 5 minutes of operation, if the temperature at the indoor
coil is 4° F more than at the time the call for cooling started,
then a reversing valve failure is indicated.
If the System is in Heat Pump Heating Mode — After 5 min
utes of operation, if the temperature indicated by the out
door coil is 4° F more than at the time the call for heating
started, then a reversing valve failure is indicated.
Table 10 — System Fault Codes
NO. OF QUICK
LED FLASHES
2
3 Indoor Coil Thermistor
4 Outdoor Coil Thermistor*
5 Compressor Malfunction
6 Reversing Valve Malfunction*
7 Outdoor Air Thermistor*
8 Indoor Fan Failure
9 Discharge Air Thermistor
LEGEND
LED — Light-Emitting Diode
•Heat pump systems only.
NOTE: If the LED light continuously flashes on for one second, then
off for one second, the control is functioning properly and no fault is
present.
SYSTEM FAULT
Room Air Thermistor
System Safeties and Interlocks
INDOOR FAN FAILURE — If the indoor fan rpm shows
greater than 800 rpm for 30 seconds with the fan in the off
mode, then this test indicates an indoor fan failure. Also, if
the indoor fan rpm is greater than 1700 rpm for 30 seconds,
then this test indicates an indoor fan failure.
COMPRESSOR SHORT-CYCLING PROTECTION—There
is a time delay of 3 minutes between compressor turning off
and turning back on.
INDOOR COIL FREEZE PROTECTION (Cooling or De
humidification Mode Only) — If the indoor coil tempera
ture is less thtin or equal to 32 F for 10 minutes after the
compressor has started, then the compressor and outdoor fan
are turned off. The indoor fan continues to run at the userselected speed until the indoor coil reaches 44 F. At that time,
the compressor and outdoor fan will restart.
INDOOR COIL HIGH-TEMPERATURE PROTECTION
(Heat Pump Systems Only) — If indoor coil temperature is
greater than or equal to 135 F, the outdoor fan shuts down.
The outdoor fan will restart automatically when the indoor
coil temperature drops to 120 F.
TROUBLESHOOTING
See Table 12 and Fig. 21-25 to assist in troubleshooting.
20
Page 21
Table 11 — 40QN Thermistor Properties*
TEMP
(F)
-40 303,300 342,700
-30 211,500
-20
-10 107,379 118,776 130,973 4.48 4.52 4.55
0
10 56,567 62,617 68,205 4.09 4.16 4.21
20 42,661
30 32,043 34,580 37,220 3.59 3.66 3.72
32 30,300 32,550 35,120 3.53 3,60 3.66
40 24,061 26,118 27,960 3.28 3.36 3.43
SO 18,650 19,900 21,180 2.99 3.05 3.11
60 14,402 15,312 16,219 2.67 2.73 2.79
70 11,247 11,883 12,518 2,36 2.42 2.47
80 8,820 9,299 9,779 2.06 2.11 2.16
90 6,846 7,339 7,754 1.76 1.83 1.88
100 5,487 5,829 6,187 1.52 1.57
110 4,367 4,667 4,976 1.29 1.34
120 3,502 3,760
130 2,830 3,051 3,281 0.92 0.97 1.02
140 2,300 2,489
150 1,880 2,045 2,216 0.65 0.69 0.74
160 1,547 1,688 1,836 0.55 0.59 0.63
170 1,280
180 1,065 1,170 1,282
190 890 982 1,078 0.33
200 748 828 913 0.28
210 631 701 766 0.24
212 611 678 751 0.23 0.25
'Circuit volts = 5 vdc.
MINIMUM
OHMS
149,721 166,689 185,146 4.61
77,281 85,677 93,867 4.30 4.35
NOMINAL
OHMS
237,276 265,444 4.72 4.75 4.77
46,302 50,129 3.86 3.92
1,402
MAXIMUM
OHMS
386,200 4.80 4.82 4.84
4,026 1.09
2,687
1,531 0.46 0.50 0.53
MINIMUM
THERMISTOR
VOLTS — DC
0,77 0.82 0.87
0.39 0.42 0.45
NOMINAL
THERMISTOR
VOLTS — DC
4.65 4.68
1.14
0.36 0.39
0.31 0.33
0.26 0.28
MAXIMUM
THERMISTOR
VOLTS — DC
4.40
3.98
1.63
1.40
1.19
0.28
Table 12 — Troubleshooting
PROBLEM POTENTIAL SOURCE ACTION
Unit does not
operate
Insufficient
Cooling
Insufficient
Heating*
Unit stops
during operation
'Heat pump systems only.
Circuit breaker has tripped or fuse is blown
Power failure Restart fan coil unit operation when power is restored.
Voltage is too low
Air filter is blocked with dust Clean the air filter.
Temperature is not set properly Check and reset if necessary.
Window(s) and/or door(s) are open Close window(s) and door(s).
Outdoor unit is obstructed Remove the obstruction.
Fan speed is too low
Operation mode is set to fan or auto, mode
Air filter is blocked with dust
Temperature is not set properly Check and reset if necessary.
Window(s) and/or doorfs) are open
Outdoor unit is obstoicted Remove the obstruction.
Off timer is operating
Room temperature has reached the programmed set point Normal unit operation.
Reset the circuit breaker or replace the fuse.
Confirm the available voltage.
Change the fan speed
Change to cooling operation or reset temperature
(using remote controller).
Clean the air filter.
Close window(s) and door(s).
Turn off the off timer function.
21
Page 22
'WALL MOUNTING
BRACKET*
I 'DRAIN LINE*
I TO OPEN DRAIN
(DO NOT TRAP)
WALLSTRAPSt
WIRELESS
CONTROLLER*
LEGEND
NEC — National Electrical Code
'Standard.
tField supplied.
NOTES:
1. All piping must follow standard refrigerant techniques. Refer to
Carrier System Design Manual for details.
2. Do not install a filter drier in mixed phase liquid line.
3. All wiring must comply with applicable local and national codes.
4. Capillary tube expansion device (cooling-only systems only) is lo
cated in №e outdoor unit. Both re№gerant lines must be insulated.
5. Wiring and piping shown are general points-of-connectbn guides only
and are not intended to include all details for a specific installation.
6. Insulate condensate line drain if installed in a conditioned space.
Fig. 21 — Typical High Wall System Piping and Wiring
^ DRAIN
~ HOSE
EXTENSION t
POWER AND HIGHVOLTAGE CONTROL
TO INDOOR UNIT
3 WIRES
(4)GR0UND
FLARE
CONNECTIONS
TO SERVICE VALVES
22
Page 23
LEGEND AND NOTES FOR FIG. 22-25
AGING — For Bum-In Test (short these terminals)
AS — Assembly
C — Contactor
CAP — Capacitor
CM — Crankcase Heater
COMP — Compressor
CN — Connector
EMI — Electromagnetic Interference
FMC — Fan Motor Capacitor
FU — Fuse
GND — Ground
HA — Home Automation
HS — Hall (Rpm) Sensor
IDC Th — Indoor Coil Temperature Thermistor
IFM — Indoor-Fan Motor
JEM-A — Japan Electric Manufacturing
K — Relay
ODATh — Outdoor Air Thermistor
ODC Th — Outdoor Coil Thermistor
OFM — Outdoor-Fan Motor
OL — Overload
PCB — Printed Circuit Board
PTC — Start Thermistor
Industry Association
NOTES:
1. If any of the original wire furnished must be replaced, it must be re
placed with Type 90° C wire or its equivalent.
2. Wire in accordance with National Electrrca! Code (NEC) and local codes.
3. Thermistor wiring cable 35 ft long provided with unit.
4. Transformer has internal 2A thermal fuse on the primary side.
5. OFM and IFM are protected with internal thermal overloads.
RA Th — Return Air Temperature Thermistor
RC — Resistor Capacitor
RCV — Receiver
RVS — Reversing Valve Solenoid
STM — Stepping Motor
RB — Terminal Block
TP — Thermal Protector
TRAN — Transformer
<T> Terminal (Marked)
O Terminal (Unmarked)
# Splice
I X I Terminal Block
-----------
Factory Wiring
-----------
Field Control Wiring
-----------
Field Power Wiring
----------
Accessory or Optional Wiring
23
Page 24
38AN009 OUTDOOR SECTION
Fig. 22 — 38AN009 with 40QNB009 Cooling Only System Wiring Diagram
24
Page 25
38AN012 OUTDOOR SECTION
Fig. 23 — 38AN012 with 40QNB012 Cooling Oniy System Wiring Diagram
25
Page 26
Fig. 24 — 38BK009 with 40QNE009 Heat Pump System Wiring Diagram
26
Page 27
27
Page 28
Page 29
Page 30
Copyright 1999 Carrier Corporation
Manufacturer rasarvas №a right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book|1 14 PC 111 Catalog No. 533-848 Printed in U.S.A. Form 38A,B/40Q-1SI P; 30 5-99 Replaces: 53AN,BK-1SI
Tab 3e 2f
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