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-Installation 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 . . . . . . . . 10
• 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 . . . . 11
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-1, CL-2
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 or service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions 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 precautions 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 instructions thoroughly. Consult local building codes and National Electrical Code (NEC) for special installation
requirements.
Electrical shock can cause personal injury or death. Before installing or servicing system, be sure to turn off
main power to system. There may be more than one disconnect switch. Turn off 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 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 indoor 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 convenient for piping connection to the outdoor section. Two
sizes are available: 9,000 and 12,000 Btuh cooling capacities. See Fig. 1 for system components, Table 1 for system
Manufacturer 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. 533-848
Printed in U.S.A.
Form 38A,B/40Q-1SI
Pg 1
5-99
Replaces: 53AN,BK-1SI
Tab 3e 2f
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 installed 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 temperature 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 wireless remote controller and indoor unit wire
1 — 38AN or 38BK Outdoor Unit
1 — Low-Ambient Kit (if required for your application)
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 corners. Note that there is a
plastic bag containing mounting screws taped to the mounting bracket.
INSPECT SHIPMENT — Upon receipt of shipment, inspect unit (Fig. 1) for damage. Forward claim papers directly to the transportation company. Manufacturer is not responsible 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.
NOTE: Field-supplied wire, drain pipe, refrigerant tubing,
etc., are also required to install unit.
The installation materials provided are for use on installations 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 installation 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.
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 location for the unit:
1. Center unit (horizontally) on the wall selected.
2. Allow sufficient space for airflow clearance, wiring, refrigerant piping, and servicing the unit. See Fig. 2-4.
3. Place the unit so it faces normal location of room
occupants.
Table 1 — System Combinations for Indoor
and Outdoor Units
SYSTEM
High Wall Cooling Only
High Wall Heat Pump
INDOOR
UNIT
40QNB009
40QNB012
40QNE009
40QNH012
OUTDOOR
UNIT
38AN009
38AN012
38BK009
38BK012
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 cooling only indoor unit. Do not mismatch systems.
Table 2 — Application Range
COOLING
Maximum
Minimum
Indoor
Outdoor
Indoor
Outdoor
95 F DB
115 F DB
67 F DB
55 F DB*
71 F WB
57 F WB
HEATING
Maximum
Minimum
Indoor
Outdoor
Indoor
Outdoor
80 F DB
75 F DB
55 F DB
0° F DB
71 F WB
65 F WB
TYPICAL FAN COL UNIT
LEGEND
DB — Dry Bulb
WB — Wet Bulb
*Unit may be equipped with a low-ambient control that will allow operation down to 220 F.
TYPICAL OUTDOOR UNIT
Fig. 1 — Typical Cooling Only/
Heat Pump System
2
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 lb 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 clearance of 31⁄29 is the absolute minimum. A clearance of 109 is
recommended.
NOTE: Remove unit front cover for control 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, making sure that unit is at least 31⁄2 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. Refrigerant 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.
If mounting bracket is not mounted level, the indoor section will be mounted unevenly, and condensate drainage 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 21⁄2-in. hole into the
wall at either point ‘‘A’’ or point ‘‘B’’ in Fig. 8.
NOTE: The 21⁄2-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
1⁄4 in. per foot of line. The condensate line cannot be
run up for upper piping connections — only refrigerant lines may be run up.
b. Push the wall sleeve (factory supplied with the unit)
through the 21⁄2-in. wall opening.
Table 3 — High Wall Unit Package Contents
ITEM
Unit Mounting Template
Unit Mounting Bracket
1-in. Lag Screws for Unit Mounting
Hollow Wall Anchor Bolts for Unit Mounting
Wall Sleeve with Wall Cap
Infrared Wireless Remote Control
AAA Batteries (for Remote Control)
Remote Control Mounting Bracket
3⁄8-in. Lag Screws for Remote Mounting Bracket
35 ft High Voltage Power Wiring
40QNB009 (3-Wire with Ground)
40QNE009 (2-Wire with Ground)
40QNB012 (2-Wire with Ground)
40QNH012 (2-Wire with Ground)
35 ft High Voltage Control Power Wiring (3-Wire)
35 ft Low Voltage Thermistor Wiring
Owner’s Manual
Installation Instructions
Warranty Registration Card
3
QUANTITY
1
1
8
5
1
1
2
1
2
1
1
1
1
1
1
1
1
1
Table 4A — Physical Data, 38AN Cooling Only Condensing Units*
UNIT 38AN
NOMINAL CAPACITY (Tons)
OPERATING WEIGHT (lb)
REFRIGERANT TYPE
Control (Cooling)
Factory Charge (lb)
COMPRESSOR TYPE
Model
Oil (Recharge) (oz)
Crankcase Heater
Accumulator
OUTDOOR FAN
Rpm
Diameter (in.)...No. of Blades
Motor Watts
Nominal Air Cfm
OUTDOOR COIL
Face Area (sq ft)...No. of Rows
Fins/in.
CONTROLS
Fusible Plug (F)
Control Voltage
REFRIGERANT LINES
Connection Type
Liquid Line OD (in.)
Vapor Line OD (in.)
Maximum Length (ft)
Maximum Lift Fan Coil (Above Outdoor) (ft)
Maximum Lift Fan Coil (Below Outdoor) (ft)
009
3⁄4
55
012
1
62
R-22
Capillary Tube
1.5
1.8
Carrier Hermetic Rotary
EAA090111A
EBB120111A
10.1
10.1
None
Yes
Propeller, Direct Drive
850
850
121⁄4...4
121⁄4...4
87
87
750
750
Copper Tube, Aluminum Fin
3.5...1
3.5...2
18
17
210
115
210
230
Male Flare
⁄
1⁄2
35
16
30
⁄
⁄
35
16
30
14
14
12
*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)
NOMINAL SIZE (Btuh)
OPERATING WEIGHT (lb)
MOISTURE REMOVAL RATE (Pints/Hr)
FINISH
REFRIGERANT
Control (Cooling)
Factory or System Charge (lb)†
INDOOR FAN
Rpm...Cfm High
Rpm...Cfm Medium
Rpm...Cfm Low
Motor Watts
Blowers — No. ...Size (in.)
INDOOR COIL
Face Area (sq ft)
No. of Rows
Fins/in.
Circuits
FILTERS
(Quantity) Size (in.)
AIRSWEEP
Horizontal
Vertical
CONTROLS
Remote Controller
Freeze Protection
Auto. Restart
Diagnostics
Timer Mode
Test Mode
Dehumidification Mode
Fan Mode
Control Voltage
REFRIGERANT LINES
Connection Type
Liquid LIne OD (in.)
Vapor Line OD (in.)
Maximum Length (ft)
Maximum Lift Fan Coil (Above Outdoor) (ft)
Maximum Lift Fan Coil (Below Outdoor) (ft)
CONDENSATE DRAIN CONNECTION (in.)
009*
3⁄4
9000
18.7
2.4
012*
1
12,000
24.2
3.4
White
R-22
Capillary Tube in Outdoor Unit
1.5
1.8
Direct Drive Centrifugal
1200...240
1040...260
1100...210
940...240
1000...180
850...210
34
35
1...3.54 x 27.75
1...3.94 x 27.75
Copper Tube, Aluminum Fin
1.45
1.6
2
2
18
17
2
3
Cleanable
(2) 9 x 12
(2) 91⁄2 x 133⁄4
Manual
Automatic
Integrated Microprocessor
Wireless
Yes
Yes
Yes
24-Hour Startup/Shutdown Type
Yes
Yes
High/Medium/Low/Auto.
115 v
230 v
Male Flare
⁄
1⁄2
35
16
30
⁄
⁄
35
16
30
14
14
12
⁄ OD, 7⁄16 ID
58
*Units may only be matched with 38AN outdoor units.
†Full factory charge shipped in outdoor unit. Charge is determined based on 25 ft of line.
4
Table 4C — Physical Data, 38BK009,012 Outdoor Heat Pump Units*
UNIT 38BK
NOMINAL CAPACITY (Tons)
OPERATING WEIGHT (lb)
REFRIGERANT TYPE
Control (Cooling)
Control (Heating)
Factory Charge (lb)
COMPRESSOR TYPE
Model
Oil (Recharge) (oz)
CRANKCASE HEATER (Watts)
OUTDOOR FAN
Rpm
Diameter (in.)...No. of Blades
Motor Watts
Nominal Air Cfm
OUTDOOR COIL
Face Area (sq ft)...No. of Rows
Fins/in.
CONTROLS
Fusible Plug
Accumulator
Defrost Method
Control Voltage
REFRIGERANT LINES
Connection Type
Liquid Line OD (in.)
Vapor Line OD (in.)
Maximum Length (ft)
Maximum Lift (Fan Coil Above) (ft)
Maximum Lift (Fan Coil Below) (ft)
009
3⁄4
60.7
012
1
66.5
R-22
AccuRaterT Piston at Outdoor Unit
AccuRater Piston at Outdoor Unit
1.5
2.0
Carrier Hermetic Rotary
EBA095111H
10.1
EBC130111H
10.1
40
Propeller, Direct Drive
850
121⁄4...4
87
756
850
121⁄4...4
87
756
Copper Tube, Aluminum Fin
3.5...1
18
3.5...2
17
210 F
Yes
Demand
115 v
210 F
Yes
Demand
230 v
Male Flare
⁄
⁄
35
16
30
14
12
*These units may only be used with 40QNE/H fan coil units.
5
⁄
⁄
35
16
30
14
12
Table 4D — Physical Data, 40QNE/H Heat Pump High Wall Units
UNIT
NOMINAL CAPACITY (Tons)
NOMINAL SIZE (Btuh)
OPERATING WEIGHT (lb)
MOISTURE REMOVAL RATE (Pints/hr)
REFRIGERANT
Control (Cooling)
Control (Heating)
Factory Charge (lb)†
INDOOR FAN
Rpm/Cfm High
Rpm/Cfm Medium
Rpm/Cfm Low
Motor Watts
Blowers Quantity...Size (in.)
INDOOR COIL
Face Area
No. of Rows
Fins/in.
Circuits
FILTERS
Quantity...Size (in.)
AIRSWEEP
Horizontal
Vertical
CONTROLS
Remote Controller Options
Diagnostics
Defrost Method
Timer Mode
Warm Start Feature
Test Mode
Freeze Protection
Dehumidification Mode
Fan Mode
Auto Changeover
Auto Restart
Control Voltage
REFRIGERANT LINES
Connection Type
Liquid Line OD (in.)
Vapor Line OD (in.)
Maximum Length (ft)
Maximum Lift (Fan Coil Above) (ft)
Maximum Lift (Fan Coil Below) (ft)
CONDENSATE DRAIN SIZE (in.)
40QNE009*
3⁄4
9000
18.7
2.4
40QNH012*
1
12,000
24.2
3.4
R-22
AccuRater® Piston at Outdoor Unit
AccuRater Piston at Outdoor Unit
1.5
2.0
Direct Drive Centrifugal
1200/240
1040/260
1100/210
940/240
1000/180
850/210
34
35
1...3.54 × 27.75
1...3.94 × 27.75
Copper Tube, Aluminum Fin
1.45
1.6
2
2
18
17
2
3
Cleanable
2...9 x 12
2...91⁄2 x 133⁄4
Manual
Automatic
Integrated Microprocessor
Wireless
Yes
Demand Defrost
Yes
Yes
Yes
Yes
Yes
High/Medium/Low/Auto
Yes
Yes
115 v
230 v
Male Flare
⁄
⁄
35
16
30
⁄
⁄
35
16
30
14
14
12
12
⁄ OD, 7⁄16 ID
58
*These units may only be matched with 38BK outdoor units. The 40QNH unit available in size 012 only.
†Full factory charge is shipped in the outdoor unit. The charge is determined based on 25 ft of line.
6
NOTES:
1. Dimensions in [
2.
3.
UNIT
38
] are in millimeters.
Direction of airflow.
AN009
AN012
BK009
BK012
Center of Gravity.
4. Minimum clearances: 4 in. on coil sides, 24 in. on fan side, and
30 in. service side.
Fig. 3 — 38AN/BK Dimensional Drawing
7
WEIGHT
Lb
55.0
62.0
60.7
66.5
Kg
25.0
28.1
27.5
30.2
NOTES:
1. Dimensions are in inches. Dimensions in [
2.
] are in millimeters.
UNIT
40QN
Direction of airflow.
009
012
3. Refrigerant, drain, and power connections may be made rear, left side or
right side.
4. Refrigerant is metered by capillary tubes in the outdoor unit. Insulate both
refrigerant lines.
5. Clearances of 31⁄29 on top of and to the left of the fan coil unit are absolute
minimums. Clearances of 109 are recommended.
6. Do not insert a trap in condensate drain line. Drain is internally trapped.
WEIGHT
Lb
Kg
18.7
8.5
24.2 11.0
Fig. 4 — 40QN Dimensional Drawing
8
A
in.
mm
33.46 850
36.61 930
B
in.
mm
11.02 280
11.81 300
C
in.
6.29
7.28
mm
160
185
Table 5 — System Piston Guide and
Refrigerant Charges
REQUIRED
SYSTEM
CHARGE
Indoor
Outdoor
(lb)*
40QNB009 38AN009 Capillary Tube Capillary Tube
1.50
40QNB012 38AN012 Capillary Tube Capillary Tube
1.80
40QNE009 38BK009
32†
30†
1.50
40QNH012 38BK012
42†
42†
2.00
UNIT
INDOOR
PISTON
SIZE
OUTDOOR
PISTON
SIZE
*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
coils. Check unit nameplate for required charge. This is a total system charge.
†Non-serviceable Aeroquip piston.
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, refrigerant 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 21⁄2 ft on electrical
and piping side. If more than one outdoor section is installed, provide a minimum clearance of 2 ft between sections. 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 indoor 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:
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. 5 — Fan Coil Unit Refrigerant Piping
Fig. 7 — Fan Coil Unit Bracket Mounting (Size 009 Shown)
9
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 outside and is not kinked or bent. Ensure that any drain extension 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 extension 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 outside and is not kinked or bent. Ensure that any drain extension is made outside the wall.
ALL TYPES PIPING CONNECTIONS
NOTE: After tubing is routed through wall sleeve, install the
factory-supplied wall cap around tubing components and into
the 21⁄2-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.
NOTE: Use either point ‘‘A’’ or point ‘‘B.’’
Fig. 8 — Wall Hole Location For Fan Coil Unit
Rear Piping (Size 009 Shown)
NOTE: Slope condensate line at a minimum pitch of 1⁄4 in. per foot.
Fig. 9 — Piping Hole
Step 5 — Connect Refrigerant Piping — Refer
to Tables 4A-4D for correct piping sizes. The length of refrigerant 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.
DO NOT BURY MORE THAN 36 IN. OF REFRIGERANT 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 recommended length is buried, refrigerant may migrate to
cooler, buried section during extended periods of unit
shutdown, causing refrigerant slugging and possible compressor damage at start-up.
IMPORTANT: All refrigerant lines must be insulated
because the refrigerant flow device is located in the
outdoor section.
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 tube are routed through the
piping hole in the wall.
4. 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 outside and is not kinked or bent. Ensure that any drain extension is made outside the wall.
Run liquid and suction refrigerant piping.
1. Run pipes as directly as possible, avoiding any unnecessary turns and bends.
2. Suspend refrigerant pipes so that the insulation is not damaged 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 connections:
1. Unpack factory-supplied tubing package. Unwind tubing
carefully. Do not bend or kink tubing.
10
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 prevent 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.
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 occupied area with a condensate-proof material, 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.
Table 6 — Flare Nut Tightening Torque
FLARE NUT
SIZE (in.)
1⁄4
1⁄2
TUBE
DIAMETER (in.)
1⁄4
1⁄2
TORQUE
(ft-lb)
10-12
35-45
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.
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 tightening 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 seconds, 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
approximately one-quarter turn counterclockwise. Leave
the valve open for approximately 3 seconds, then return 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 service valve caps.
g. Thoroughly reinspect all joints and connections for refrigerant leaks. Use soapy water or electronic leak detector.
h. Tape both insulated tubing lines together. Begin taping 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.
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 system where voltage may fluctuate above or below permissible limits.
NOTE: Use type NM (per NEC) power cable only (provided) between indoor disconnect switch (if installed) and
indoor unit.
NOTE: Install branch circuit disconnect per NEC of adequate size to handle unit starting current. Locate disconnect
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.
According to NEC and most local codes, the unit must
have an uninterrupted, unbroken ground to minimize personal injury if an electric fault should occur. The ground
may consist of electrical wire or metal conduit when installed in accordance with existing electrical codes. Failure to follow this warning could result in an electric shock,
fire, or death.
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.
Step 7 — Connect Condensate Drain Line —
Observe all local sanitary codes when installing condensate
drains.
1. Connect drain lines by inserting a 5⁄8-in. ridged PVC pipe
over the drain connection fitting provided.
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 terminal 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 systems) or two 14-gage, 3-wire conductors (heat pump systems) through the power wiring hole in the control box.
NOTE: Connectors are factory supplied.
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 downward slope of at least 1⁄4-in. per ft. Refer to Fig. 10.
11
Fig. 10 — Fan Coil Unit Drainage System (Rear Piping Shown)
Table 7 — Electrical Data
UNIT
Outdoor Section
38AN009
38AN012
38BK009
38BK012
Indoor Section
40QNB009
40QNB012
40QNE009
40QNH012
VOLTAGE RANGE
Min
Max
COMPRESSOR
LRA
RLA
115-1
208/230-1
115-1
208/230-1
104
187
104
187
127
253
127
253
46.5
30.0
45.0
30.0
115-1
208/230-1
115-1
208/230-1
104
187
104
187
127
253
127
253
—
—
—
—
V-PH
(60 Hz)
FLA — Full Load Amps
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
FAN
FLA
MCA
MOCP
7.6
5.5
9.0
5.8
.76
.35
.76
.35
12.1
8.5
11.2
12.4
15
15
15
15
—
—
—
—
.41
.23
.41
.23
—
—
—
—
—
—
—
—
LEGEND
MOCP — Maximum Overcurrent Protection Amps
RLA
— Rated Load Amps
Table 8 — Electric Heater Data
INDOOR UNIT
40QNH012
V-PH (60 Hz)
230-1
INPUT AMPS
3.3
kW AT 230 V
.75
MIN WIRE SIZE (AWG)
14
LEGEND
AWG — American Wire Gage
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 location 3. See Fig. 11.
• Cooling-Only, Size 012 Units:
Connect the black lead to terminal block location L1.
Connect the red lead to terminal block location L2. Connect the bare copper ground lead to terminal block location G. Connect the yellow lead to terminal block location 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 location 2. See Fig. 11.
• Heat Pump, Size 012 Units:
Connect the black lead to terminal block location L1.
Connect the red lead to terminal block location L2. 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 location 2. See Fig. 11.
5. Route the other end of the power cable through the wall
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 supply outlets.
4. Route the 14-gage, 4-wire conductor (cooling only systems) or the two 14-gage, 3-wire conductors (heat pump
systems) from the indoor section through the upper electrical 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
12
outdoor unit. For installation simplicity, the fieldsupplied conductor should be black, white, and bare copper 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
L1. 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. 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 location 2. See Fig. 11.
• Heat Pump, Size 012 Systems:
Connect the 2 black leads to terminal block location
L1. 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 correctly mounted.
*The 012 heat pump units have the following terminal block connections: 1, 2, 3, L1, 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
Fig. 12 — Mounting Fan Coil Unit to Bracket
13
communication, all of the following must be true for the controller 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 directly 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 the 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.
START-UP
Complete the following checks and the Start-Up Checklist 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.
Never operate unit without a filter. Damage to the
unit could result.
After Extended Shutdowns — If the system has been
turned off for more than 12 hours, turn on the indoor and
outdoor unit disconnect switches to supply power to the system for 12 hours BEFORE starting the system.
5. Fully backseat (open) the liquid and vapor tube service
valves.
6. Unit is shipped with valve stems frontseated and caps factory 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 outdoor 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.
Seasonal Changeovers — When changing heat pump
system from cooling to heating or heating to cooling, or before starting cooling only system after it has been out of use
for the winter season, perform the following steps
BEFORE starting the system:
1. Inspect 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 remove any obstructions.
4. Turn on the indoor and outdoor unit disconnect switches
to supply power to the system for 12 hours before starting the system.
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 indoor 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 control the operating mode. To change settings or modes of operation, use the factory-supplied infrared wireless remote
controller. This controller allows the fan coil unit to be operated from within the same room without any wire connections to the unit.
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 with the fan
coil unit for full remote control operating details.
Adjusting Airflow — The airflow direction may be adjusted 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 automatically be used if auto. fan mode is selected.
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 malfunctions or is misplaced. Because the controller uses infrared
Operating Mode Memory — After the system is turned
off or after a power failure, the system remains in the last
operating mode selected. When the system is turned back on
or when power is automatically restored, operation continues 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 below the selected temperature when only the fan is
operating.
Fig. 13 — Mounting Remote Controller Bracket
14
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 depending 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 temperature 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 remain off.
• Maximum Dehumidification Mode — When the Dehumidification 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 depending on the room temperature. If the room temperature is below the set point,
the indoor fan will run at ultra-low speed, and the compressor 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 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.
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 temperature, 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 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 normal dehumidification operation is repeated for the newly sensed room
temperature.
2. If the room temperature is equal to or greater than the
selected temperature, 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
Fig. 14 — Remote Controller
*Potential range.
†Desirable range.
NOTE: Unit is equipped with manual 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.
Fig. 15 — Louver Adjustments
Operating Fault Diagnosis — The system includes
an automatic diagnosis feature which is activated under difficult or unacceptable operating conditions. If such conditions 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 operating conditions is initiated. The system will then be restarted
automatically, as soon as normal conditions have been restored, 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 system is controlled by a microprocessor designed to give optimum levels of comfort and operating efficiency. The control is located in the 40QN unit. To operate the unit, the factorysupplied remote controller is required.
There are 9 (QNB systems) or 12 (QNE/H systems) operating modes (including the off mode) for the unit. Each
mode operates as follows:
• Off Mode — When the unit is in the Off mode, all functions (compressor, outdoor fan, indoor fan, and air sweep)
15
• 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 approximately 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 Cooling 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 controller 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 discharged. 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 controller until the slide switch is returned to the REMOTE
position.
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 repeated 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. After 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 temperature, the compressor, outdoor fan, and indoor fan remain off. After 71⁄2 minutes, the indoor fan operates at
ultra-low speed for 30 seconds. The normal dehumidification 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 prevent cold drafts). If the indoor fan is in Auto. mode, the
fan will change operating speeds depending on the difference 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 temperature, or the compressor runs for 40 minutes (whichever 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 outdoor unit is below 40 F and the room temperature thermistor is equal to or less than 5.4° F below set point. Electric 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 units, 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.
16
40
DEFROST REGION THREE
(NO DEFROST OPERATION)
OUTDOOR COIL TEMPERATURE (F)
30
ADJUSTS IF LONG
DEFROST CYCLE
(MORE THAN
6 MINUTES)
DEFROST REGION TWO
(MINIMUM UNIT RUNTIME
= 6 HOURS*)
ADJUSTS IF SHORT
DEFROST CYCLE
(LESS THAN
3 MINUTES)
T
20
EN
TM
S
JU
UM
AD
)
UP
ER
IM
AX
AT
W
M
AL
T
(A
T
PO
EN
M
ST
JU
IN
10
M
NO
UM
AD
IM
IN
AT
M
DEFROST REGION ONE
(MINIMUM UNIT RUN TIME
= 50 MIN.*)
0
-10
-10
0
10
20
20
OUTDOOR AIR TEMPERATURE (F)
*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
40
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.
CLEANING AND MAINTENANCE
To avoid the possibility of electric shock, before performing any cleaning and maintenance operations always 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 outdoor unit. If the indoor unit is on a separate switch, be
sure it is also disconnected.
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 indication 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 indication 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.
For proper system operation, perform the cleaning and maintenance operations in Table 9.
Lubrication — The indoor-fan automatic air sweep motor, and the outdoor-fan motor are factory lubricated and require no oiling.
To Install or Replace Remote Controller
Batteries
Do not drop the remote controller — damage to the device may result. Avoid getting the controller wet.
To Remove and Clean or Replace Air Filters
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. If 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 −).
Operating your system with dirty air filters may damage
the indoor unit and can also cause reduced cooling performance, 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 replace by sliding filter behind front grille until filter snaps in
place.
If the filter has begun to break down or is torn, it needs to
be replaced. Replacement filters are available through your
Carrier distributor.
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 system no longer responds to commands given close to the unit.
NOTE: DO NOT put filters in the dishwasher.
Table 9 — Cleaning and Maintenance Schedule
TASK
INDOOR UNIT
Clean Air Filters
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
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
MONTHLY
QUARTERLY
YEARLY
X
X
X
X
X
X
X
X
X
X
X
X
18
To Clean Indoor Unit Front Panel — If the front
panel of the unit becomes dirty or smudged, wipe the outside of the front panel with a soft dry cloth. If necessary, use
a mild liquid detergent and wipe off carefully with a dry cloth.
To Clean Outdoor Coil (Outdoor Unit)
Some metal parts and sharp fins of outdoor unit coil can
cause personal injury during cleaning. Clean coil
carefully.
When cleaning the front panel, NEVER use water hotter than 105 F, and DO NOT pour water into the fan
coil unit. Do not use abrasive or petroleum based cleaners — damage to unit appearance will result.
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 Indoor Coil — To clean the coil, remove indoor unit front panel, and vacuum the coil fins. Use care not
to bend or damage fins.
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
PRESS RST
NOTE: Be sure to insert new batteries correctly (as shown).
Fig. 18 — Installing or Replacing Batteries
PRESS TA
SET TIME
PRESS TA
Fig. 19 — Setting the Current Time
REMOVE FILTER
VACUUM CLEAN
Fig. 20 — Air Filter Maintenance
19
RINSE WITH WATER
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 — After 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 minutes of operation, if the temperature indicated by the outdoor coil is 4° F more than at the time the call for heating
started, then a reversing valve failure is indicated.
SERVICE
When servicing unit, turn off all electric power to unit
to avoid shock hazard or injury from rotating parts.
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 operation 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 normal operation. 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 indicates that a fault has been detected. Table 10 lists the number of quick flashes and the associated fault. If the system
does not operate and the LED indicator does not flash, either
the power is off to the control board or the control board has
failed.
Table 10 — System Fault Codes
NO. OF QUICK
LED FLASHES
2
3
4
5
6
7
8
9
SYSTEM FAULT
Room Air Thermistor
Indoor Coil Thermistor
Outdoor Coil Thermistor*
Compressor Malfunction
Reversing Valve Malfunction*
Outdoor Air Thermistor*
Indoor Fan Failure
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 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.
System Tests — System tests listed below are performed continuously by the microprocessor. If a fault is
indicated, then the system allows only limited operation until the problem is resolved. If the problem resolves itself,
then the code is cleared and operation resumes.
THERMISTOR 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 appropriate fault code. Proper thermistor location and correct
temperature sensing are critical to unit operation. Good thermal contact is also required. Thermistor cable assemblies are
provided with fan coil units to run between indoor and outdoor units. High-voltage and thermistor cable assemblies should
not touch each other, and cable runs may be extended up to
200 feet.
With unit running, the thermistor integrity may be checked
by measuring the dc voltage across the two thermistor connections. Approximate temperature is indicated in Table 11.
COMPRESSOR FAILURE
If the System is in Cooling or Dehumidification Mode — After 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 controller LCD display.
INDOOR COIL FREEZE PROTECTION (Cooling or Dehumidification Mode Only) — If the indoor coil temperature is less than 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
Table 11 — 40QN Thermistor Properties*
TEMP
(F)
MINIMUM
OHMS
NOMINAL
OHMS
MAXIMUM
OHMS
−40
−30
−20
−10
0
10
20
30
32
40
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
212
303,300
211,500
149,721
107,379
77,281
56,567
42,661
32,043
30,300
24,061
18,650
14,402
11,247
8,820
6,846
5,487
4,367
3,502
2,830
2,300
1,880
1,547
1,280
1,065
890
748
631
611
342,700
237,276
166,689
118,776
85,677
62,617
46,302
34,580
32,550
26,118
19,900
15,312
11,883
9,299
7,339
5,829
4,667
3,760
3,051
2,489
2,045
1,688
1,402
1,170
982
828
701
678
386,200
265,444
185,146
130,973
93,867
68,205
50,129
37,220
35,120
27,960
21,180
16,219
12,518
9,779
7,754
6,187
4,976
4,026
3,281
2,687
2,216
1,836
1,531
1,282
1,078
913
766
751
MINIMUM
THERMISTOR
VOLTS — DC
4.80
4.72
4.61
4.48
4.30
4.09
3.86
3.59
3.53
3.28
2.99
2.67
2.36
2.06
1.76
1.52
1.29
1.09
0.92
0.77
0.65
0.55
0.46
0.39
0.33
0.28
0.24
0.23
NOMINAL
THERMISTOR
VOLTS — DC
4.82
4.75
4.65
4.52
4.35
4.16
3.92
3.66
3.60
3.36
3.05
2.73
2.42
2.11
1.83
1.57
1.34
1.14
0.97
0.82
0.69
0.59
0.50
0.42
0.36
0.31
0.26
0.25
MAXIMUM
THERMISTOR
VOLTS — DC
4.84
4.77
4.68
4.55
4.40
4.21
3.98
3.72
3.66
3.43
3.11
2.79
2.47
2.16
1.88
1.63
1.40
1.19
1.02
0.87
0.74
0.63
0.53
0.45
0.39
0.33
0.28
0.28
*Circuit volts = 5 vdc.
Table 12 — Troubleshooting
PROBLEM
Unit does not
operate
Insufficient
Cooling
POTENTIAL SOURCE
Circuit breaker has tripped or fuse is blown
Power failure
Voltage is too low
Air filter is blocked with dust
Temperature is not set properly
Window(s) and/or door(s) are open
Outdoor unit is obstructed
Fan speed is too low
Operation mode is set to fan or auto. mode
Insufficient
Heating*
Unit stops
during operation
Air filter is blocked with dust
Temperature is not set properly
Window(s) and/or door(s) are open
Outdoor unit is obstructed
Off timer is operating
Room temperature has reached the programmed set point
*Heat pump systems only.
21
ACTION
Reset the circuit breaker or replace the fuse.
Restart fan coil unit operation when power is restored.
Confirm the available voltage.
Clean the air filter.
Check and reset if necessary.
Close window(s) and door(s).
Remove the obstruction.
Change the fan speed
Change to cooling operation or reset temperature
(using remote controller).
Clean the air filter.
Check and reset if necessary.
Close window(s) and door(s).
Remove the obstruction.
Turn off the off timer function.
Normal unit operation.
LEGEND
NEC — National Electrical Code
*Standard.
†Field 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 located in the outdoor unit. Both refrigerant lines must be insulated.
5. Wiring and piping shown are general points-of-connection 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
22
LEGEND AND NOTES FOR FIG. 22-25
AGING
AS
C
CAP
CH
COMP
CN
EMI
FMC
FU
GND
HA
HS
IDC Th
IFM
JEM-A
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
K
ODA Th
ODC Th
OFM
OL
PCB
PTC
—
—
—
—
—
—
—
For Burn-In Test (short these terminals)
Assembly
Contactor
Capacitor
Crankcase Heater
Compressor
Connector
Electromagnetic Interference
Fan Motor Capacitor
Fuse
Ground
Home Automation
Hall (Rpm) Sensor
Indoor Coil Temperature Thermistor
Indoor-Fan Motor
Japan Electric Manufacturing
Industry Association
Relay
Outdoor Air Thermistor
Outdoor Coil Thermistor
Outdoor-Fan Motor
Overload
Printed Circuit Board
Start Thermistor
RA Th
RC
RCV
RVS
STM
RB
TP
TRAN
—
—
—
—
—
—
—
—
Return Air Temperature Thermistor
Resistor Capacitor
Receiver
Reversing Valve Solenoid
Stepping Motor
Terminal Block
Thermal Protector
Transformer
Terminal (Marked)
Terminal (Unmarked)
Splice
Terminal Block
Factory Wiring
Field Control Wiring
Field Power Wiring
Accessory or Optional Wiring
NOTES:
1. If any of the original wire furnished must be replaced, it must be replaced with Type 90° C wire or its equivalent.
2. Wire in accordance with National Electrical 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.
23
Fig. 22 — 38AN009 with 40QNB009 Cooling Only System Wiring Diagram
24
Fig. 23 — 38AN012 with 40QNB012 Cooling Only System Wiring Diagram
25
Fig. 24 — 38BK009 with 40QNE009 Heat Pump System Wiring Diagram
26
Fig. 25 — 38BK012 with 40QNH012 Heat Pump System with Electric Heat Wiring Diagram
27
Copyright 1999 Carrier Corporation
Manufacturer 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. 533-848
Printed in U.S.A.
Form 38A,B/40Q-1SI
Pg 30
5-99
Replaces: 53AN,BK-1SI
Tab 3e 2f
START-UP CHECKLIST
I. PRELIMINARY INFORMATION
OUTDOOR UNIT: MODEL NO.
SERIAL NO.
OUTDOOR UNIT: MODEL NO.
SERIAL NO.
ACCESSORIES: __________________________________________________________________________________
II. PRE-START-UP
IS THERE ANY SHIPPING DAMAGE?
IF YES, WHERE?
WILL THIS DAMAGE PREVENT UNIT START-UP?
CHECK POWER SUPPLY. IS IT 115 V (009 UNITS) OR 208/230 V (012 UNITS), SINGLE PHASE?
HAS GROUND WIRE BEEN CONNECTED?
HAS THE CORRECT SIZE FUSE OR HACR BREAKER BEEN PROVIDED?
ARE POWER WIRES TO THE UNIT SIZED AND INSTALLED PROPERLY?
IS THE DISCONNECT SWITCH INSTALLED IN SIGHT FROM THE UNIT?
HAS CONDENSATE DRAIN BEEN RUN AND SLOPED PROPERLY?
IS AIR FILTER(S) IN PLACE?
IS UNIT MOUNTED LEVEL?
III. PIPING
HAVE LEAK CHECKS BEEN MADE AT THE COMPRESSOR, OUTDOOR UNIT, FLARE CONNECTIONS AND
FUSIBLE PLUGS WITH A LEAK DETECTOR?†
†FIELD PIPING AND ALL TUBING CONNECTIONS MUST BE LEAK TESTED BY THE PRESSURE METHOD
DESCRIBED IN CARRIER GENERAL TRAINING FOR AIR CONDITIONING MANUAL (GTAC2), MODULE 5. USE
R-22 AT APPROXIMATELY 25 PSIG BACKED UP WITH AN INERT GAS TO REACH A TOTAL SYSTEM PRESSURE
NOT TO EXCEED 245 PSIG.
CL-1
HAS PIPING SYSTEM BEEN EVACUATED TO 1000 MICRONS?
HAS SYSTEM CHARGE BEEN WEIGHED IN (IF REQUIRED)?
HAVE SERVICE VALVES BEEN FULLY BACKSEATED?
CHECK VOLTAGE:
OUTDOOR
IS VOLTAGE WITHIN RANGE SHOWN FOR UNIT (WITH UNIT OPERATING)?
INDOOR
IV. START-UP
IF UNIT HAS A CRANKCASE HEATER, HAS IT BEEN ON FOR 24 HOURS?
MEASURE AND RECORD THE:
F
AIR ENTERING OUTDOOR UNIT:
AIR ENTERING INDOOR UNIT:
F
F
DISCHARGE LINE TEMPERATURE:
VAPOR LINE TEMPERATURE:
F
MEASURE AND RECORD THE:
VAPOR LINE PRESSURE:
PSIG
DISCHARGE PRESSURE:
PSIG
NOTES:
Copyright 1999 Carrier Corporation
Manufacturer 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. 533-848
Printed in U.S.A.
Form 38A,B/40Q-1SI
Pg CL-2
5-99
Replaces: 53AN,BK-1SI
Tab 3e 2f
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - CUT ALONG DOTTED LINE
CUT ALONG DOTTED LINE
START-UP CHECKLIST (cont)