Daikin AWSF18SU16 Series User manual
WALL MOUNT AIR HANDLERS
© 2023
19001 Kermier Rd., Waller, TX 77484
www.daikinac.com
WITHOUT NOTICE.
THIS MANUAL SHOULD
INSTALLED.
2
CAUTION
CAUTION
CONTENTS
....................................... 3
...................................................... 3
2.1 Parts ........................................................................... 3
2.2 Handling ..................................................................... 3
2.3 Shipping Material Removal......................................... 3
.................................................... 3
........................................................ 4
......................................... 4
5.1 Preparation................................................................. 4
5.2 System Matches......................................................... 4
5.3 Interconnecting Tubing ............................................... 4
5.4 Clearances ................................................................. 4
................................................ 4
....................................... 5
7.1 Building Electrical Service Inspection......................... 5
7.2 Wire Sizing ................................................................. 5
7.3 Maximum Overcurrent Protection (MOP) ................... 5
7.4 Electrical Connections – Supply Voltage .................... 6
7.5 Fresh Air Openings..................................................... 6
................................. 6
........................................................ 6
......................... 6
10.1 Tubing Size............................................................... 6
10.2 Tubing Connections ................................................. 6
10.3 Thermal Expansion Valve System Adjustment ........ 7
................................................................. 7
............................... 8
12.1 Low Voltage Connections ......................................... 9
............................. 9
..................................................... 15
3
The following symbols and labels are used throughout this
manual to indicate immediate or potential safety hazards.
It is the owner’s and installer’s responsibility to read
and comply with all safety information and instructions
accompanying these symbols. Failure to heed safety
information increases the risk of personal injury, property
damage, and/or product damage.
Upon receiving the product, inspect it for damage from
shipment. Shipping damage, and subsequent investigation
is the responsibility of the carrier. Verify the model number,
specications, electrical characteristics, and accessories
are correct prior to installation. The distributor or manufac-
turer will not accept claims from dealers for transportation
damage or installation of incorrectly shipped units.
Inspect the unit to verify all required components are
present and intact. Report any missing components
immediately to the manufacturer or to the distributor. Use
only factory authorized replacement parts (see Section 5).
Make sure to include the full product model number and
serial number when reporting and/or obtaining service
parts.
Use caution when transporting / carrying the unit. Do not
move unit using shipping straps. Do not carry unit with
hooks or sharp objects. The preferred method of carrying
the unit after arrival at the job site is to carry via a two-
wheel hand truck from the back or sides or via hand by
carrying at the cabinet corners.
This product is designed and manufactured to comply with
national codes. Installation in accordance with such codes
and/or prevailing local codes/regulations is the respon-sibil-
ity of the installer. The manufacturer assumes no respon-
sibility for equipment installed in violation of any codes or
regulations.
The standard test ambient operating conditions for cooling
and heating mode are 80°F and 70°F, respectively.
4
These
regulations may vary by jurisdiction. A certied technician
must perform the installation and service of this product.
Should you have any questions please contact the local
oce of the EPA and/or refer to the EPA’s website www.
epa.gov.
When reporting shortages or damages, or ordering repair
parts, give the complete product model and serial num-
bers as stamped on the product. Replacement parts for
this product are available through your contractor or local
distributor. Your nearest distributor can be located online at
https://partner.goodmanmfg.com/ or by contacting:
HOMEOWNER SUPPORT
19001 KERMIER ROAD
WALLER, TEXAS 77484
(855) 770-5678
Installer’s Note:
Replacement air lters can be ordered directly from the
supplier:
United Air Filter
Charlotte, NC
Phone:
AWSF/AWST 18-24 - Part #BT1369604,14” x 18” x 1”
AWSF/AWST 30-36 - Part #BT1369608,18” x 20” x 1”
Keep this document with the unit. Carefully read all instruc-
tions for the installation prior to installing product. Make
sure each step or procedure is understood and any special
considerations are taken into account before starting instal-
lation. Assemble all tools, hardware, and supplies needed
to complete the installation. Some items may need to be
purchased locally. Make sure everything needed to install
the product is on hand before starting.
The entire system (combination of indoor and outdoor sec-
tions) must be manufacture approved and Air-conditioning,
Heating, and Refrigeration Institute (AHRI) listed.
Give special consideration to minimize the length of refrig-
erant tubing when installing air handlers. Refer to Remote
Cooling/ Heat Pump Service Manual RS6200006, and TP-
107 Long Line Set Application R-410A for tubing guidelines.
If possible, allow adequate length of tubing such that the
coil may be removed (for inspection or cleaning services)
from the cabinet without disconnecting the tubing.
These air handlers are designed for indoor installa-
tion only at a max altitude of 10,500 feet above sea level or
a min altitude of -184 feet below sea level.
If the unit is located in an unconditioned area with high
ambient temperature and/or high humidity, the air handler
may be subject to nuisance sweating of the casing. On
these installations, a wrap of 2” berglass insulation with
a vapor barrier is recommended. A secondary drain
pan below the unit is also recommended to protect the
installation site.
The unit clearance from a combustible surface may be
0”. However, service clearance must take precedence. A
minimum of 24” in front of the unit for service clearance
is required. Additional clearance on one side or top will
be required for electrical wiring connections. Consult all
appropriate regulatory codes prior to determining nal
clearances. When installing this unit in an area that may
become wet (such as crawl spaces), elevate the unit with a
sturdy, non-porous material. In installations that may lead
to physical damage (i.e. a garage) it is advised to install a
protective barrier to prevent such damage. Always install
units such that a positive slope in condensate line (1/4” per
foot) is allowed.
The unit is designed to be installed in conditioned space,
either recessed into a wall or hanging in a vertical
“upow” position. If units are recessed in a wall, use
the holes along the inside of the front ange to attach
units to the framing studs. The vertical air handler comes
equipped with an oset hanging bracket attached to the
rear of the cabinet for hanging applications.
The air handler also has a bottom and front return.
. If the small chassis air handler is to be installed in
a bottom return application, discard the drain access
panel in the bottom of the unit. If the air handler is to be
installed in a front return application, remove and discard
the front access panel with insulation. The unit is shipped
with a lter rack and lter. Remember to inspect, clean
and/or replace the lter monthly.
5
Units are equipped with both a bottom primary and second-
ary drain. Both drains must be trapped, unless emergency
condensate switch is install in the secondary drain. Failure
to install a trap could result in condensation overowing
the drain pan resulting in substantial water damage to the
nearby area.
The connectors required are 3/4” NPT male, either PVC
or metal pipe, CPVC piping is not approved, and should
be hand tightened to a torque of no more than 37 in-lbs. to
prevent damage to the drain pan connection.
To prevent potential sweating and dripping on to nished
space, it may be necessary to insulate the condensate
drain line located inside the building. Use Armaex® or
similar material.
CONNECTED.
OR DEATH.
This unit is designed for single-phase electrical supply.
Measure the power supply to the unit. The supply voltage
must be in agreement with the unit name plate power
requirements and within the range shown in Table 1.
Nominal Input Minimum Voltage Maximum Voltage
208/230 187 253
Wire size is important to the operation of your equipment.
Use the following checklist when selecting the appropriate
wire size for the unit.
• Wire used must cary the Minimum circuit Ampacity
(MCA) listed on the unit’s Series and Rating Plate.
• Refer to the NEC (USA) or CSA (Canada) for wire
sizing. The unit MCA for the air handler and the
optional electric heat kit can be found on the unit
Series and Rating Plate.
• Wire must be sized to allow no more than a 2% voltage
drop from the building breaker/fuse panel to the unit.
• Wires with dierent insulation temperature rating have
varying ampacities - be sure to check the temperature
rating used.
Refer to the latest edition of the National Electric Code or in
Canada the Canadian Electric Code when determining the
correct wire size.
Every installation must include an NEC (USA) or CEC
(Canada) approved overcurrent protection device. Also,
check with local or state codes for any special regional
requirements.
Protection can be in the form of fusing or HACR style
circuit breakers. The Series and Rating Plate can be used
as a guide for selecting the MAXIMUM overcurrent
device.
6
CAUTION
A knockout is provided on the air handler top panel or side
to allow for the entry of the supply voltage conductors. If
the knockouts on the cabinet sides are used for electrical
conduit, an adapter ring must be used in order to meet
safety requirements. An NEC or CEC approved strain relief
is to be used at this entry point. The wire is to be sized in
accordance with the “Electrical Wire and MOP” section
of this manual. Some areas require the supply wire to be
enclosed in conduit. Consult your local codes.
Top of Cabinet
All AWSF/AWST models include 4” fresh air knockouts
on both sides of the cabinet. To utilize, simply remove the
appropriate knockout and connect fresh air inlet venting
directly to cabinet. Ensure the unit mounting system does
not block the fresh air inlet holes.
Ensure all the gaskets remain intact on surfaces as
shipped with the unit. When these requirements are
satised, the unit achieves the following airow leakage
when tested in accordance with ASHRAE Standard 193:
- Cabinet air leakage less than 2% at 1.0 inch H2O
- Cabinet air leakage less than 1.4% at 0.5 inch H2O
• Prior to start-up, ensure that all electrical wires are
properly sized and all connections are properly
tightened.
• All panels must be place and secured. For Air Tight
application, gasket must be positioned at prescribed
locations to achieve 1.4% leakage.
• Tubing must be leak free.
• Condensate line must be trapped and pitched to allow
for drainage.
• Low voltage wiring is properly connected.
• Unit is protected from vehicular or other physical
damage.
• Return air is not obtained from areas where there may
be objectionable odors, ammable vapors or products
of combustion such as carbon monoxide (CO), which
may cause serious personal injury or death.
MODELS
AWST air handlers come equipped with a factory installed
fully adjustable TXV, follow instruction below for installation
procedure.
For the correct tubing size, follow the specication for the
condenser/heat pump.
An adjustable TXV with bulb is installed on the vapor tube
from the factory.
7
For air handler installation, follow the installation procedure
below.
1. Remove the front access panel.
2. Remove access valve tting cap and depress the valve
system to release pressure. No pressure indicates
possible leak.
3. Replace the tting cap.
4. Remove the copper cap on both the liquid line and
suction line. The copper caps caused by the refrigerant
lines. DO NOT USE ANY FORM OF CUTTING
METHOD. CUTTING THE CAPS MAY RESULT IN
THE GENERATION OF COPPER SHAVINGS OR
COPPER DUST.
5. Insert liquid line into liquid tube expansion and
slide grommet about 18” away from braze joint.
6. Braze suction line set into suction tube expansion and
slide insulation about 18” away from braze joint.
7. Braze joints and quench all brazed joints with water or
wet rag upon completion of brazing.
The following information for the indoor unit should be
veried before attempting to charge system or adjust TXV if
necessary.
1. Total static presssure is .3” WC or less.
2. Airow is correct for installed unit.
3. Airow tables are in the installation manual and Spec
Sheet for Indoor Unit.
4. Complete airow tables and charging information are in
Service Manual RS6200006.
5. The outdoor temperature must be 60°F or higher.
6. Set the room thermostat to COOL, fan switch to AUTO
7. Set temperature control well below room temperature.
Superheat adjustments should not be made until indoor
ambient conditions have stabilized. This could take up
to 24 hours depending on the indoor temperature and
humidity. Before checking superheat run the unit in cooling
for 10 minutes or until refrigerant pressures stabilize.
Use the following guidelines and methods to check unit
operation and ensure that the refrigerant charge is within
limits.
1. Purge gauge lines. Connect service gauge manifold to
base-valve service ports.
2. Temporarily install a thermometer on the liquid
line at the liquid line service valve and 4-6” from
the compressor on the suction line. Ensure the
thermometer makes adequate contact and is insulated
for best possible readings. Use liquid line temperature
to determine subcooling and vapor temperature to
determine superheat.
3. Check subcooling and superheat. The system should
have a subcooling of 8°F +/- 1°F and superheat of 8°F
+/- 1°F. If subcooling and superheat are low, adjust
TXV to 8°F +/- 1°F superheat, then check subcooling.
A. If subcooling is low and superheat is high, add
charge to raise subcooling to 8°F +/- 1°F, then
check superheat.
B. If subcooling and superheat are high, adjust
TXV valve to 8°F +/- 1°F superheat, then check
subcooling.
1. Attach a pipe clamp thermometer near the suction line
service valve at the outdoor unit.
A. Ensure the thermometer makes adequate contact
for the best possible readings.
2. TXV-based systems should have a Superheat value of
8°F +/- 1°F.
3. Adjust Superheat by turning the TXV valve stem
clockwise to and to
. Adjustments should be made opening or
closing the vlave by no more that 1/4 turn at a time.
Allow the system to stabilize to 15 to 20 minutes before
making additional adjustments if necessary.
4. After adjustments are complete, replace cap on
adjustment stem and tighten 1/6 turn.
5. Remove gauges and check the Schrader ports for
leaks and tighten valve cores if necessary. Install caps
nger tight.
Periodic Checkup and Service
This unit is designed to provide many years of dependable,
trouble-free comfort when properly maintained. Proper
maintenance will consist of annual checkups and cleaning
of the internal electrical and heat transfer components by
a qualied service technician. Failure to provide periodic
checkup and cleaning can result in excessive operating
cost and/or equipment malfunction.
Heater Kit Service
This comfort equipment comes pre-installed with a UL 2-40
certied heater kit. In times of replacement, please ensure
that only a UL 2-40 certied kit is utilized.
8
AWSF 18-36
AWST 18-36
LARGE CHASSIS SMALL CHASSIS
2.5 & 3.0 TON 1.5 & 2.0 TON
A 36 36
B 24 20 3/16
C 21 16 1/8
D 19 7/8 16
E 15 7/8 11
CABINET DIMENSIONS
R G WC
Thermostat
Air Handler
Condensing Unit
#18 Gauge
24 VAC
#18 Gauge
24 VAC
Y R G W
C Y
Y
Note: Connect T2, T3, or T4 to the Y
terminal to the outdoor unit. See Table 5
for correct CFM selec�on.
T1
T5
Model TAP COLOR
T1 GREEN
T2 PURPLE
T3 PINK
T4
*
T5 WHITE
AWSF18SU16**
AWST18SU14**
AWSF24SU16**
AWST24SU14**
Model TAP COLOR
T1 GREEN
T2 PURPLE
T3 PINK
T4 YELLOW
T5 WHITE
AWSF30LU16**
AWST30LU14**
AWSF36LU16**
AWST36LU14**
9
Several combinations of low voltage schemes are possible,
depending on the presence of a heat kit and whether the
heat kit is single-stage or multi-stage, whether the outdoor
section is an air conditioner or heat pump, and whether
the outdoor section is single-stage or two stage. The
24V-control voltage connects the air handle to the room
thermostat and condenser. Low voltage wiring must be
copper conductors. A minimum of 18AWG must be used
for installations. Low voltage wiring must be connected
through the top of the cabinet or either side.
0.1 0.2 0.3
T1 630 602 576
T2 630 602 576
T3 637 609 586
T4 630 602 576
T5 846 824 800
T1 630 602 576
T2 630 602 576
T3 784 763 742
T4 630 602 576
T5 846 823 800
T1 683 604 525
T2 900 856 803
T3 1079 1025 989
T4 944 897 848
T5 1168 1127 1083
T1 1114 1072 1031
T2 1114 1072 1031
T3 1225 1191 1152
T4 1287 1255 1219
T5 1360 1329 1299
Model
Speed
Tap
CFM @ STATIC PRESSURE (IN W.C.)
AWSF18SU16** AA
AWST18SU14** AA
AWSF24SU16** AA
AWST24SU14** AA
AWSF30LU16** AA
AWST30LU14** AA
AWSF36LU16** AA
AWST36LU14** AA
1. Airow data indicated is at 230V without air lter in
place.
2. Select a speed tap that provides a minimum 300 CFM
per outdoor ton. For satisfactory operation, external
static pressure must no exceed 0.3" WC (for electric
heater only).
Before replacing an expansion valve, check the following
items:
1. Bulb location: Must be tightly secured to the suction
line upstream of the equalizer connection.
2. Insulation: Bulb must be properly insulated.
3. Equalizer: Must be connected to the 1/4” SAE
connection on the suction line.
4. Charge: Ensure the system is properly charged. There
MUST be a minimum of 10°F Sub-Cooled liquid at the
valve inlet.
If the system appears to be “starving” (low suction pressure
but insucient cooling):
1. Check the Superheat (SH) at the evaporator outlet.
If SH is between 5°F - 12°F, the TXV is controlling
properly.
- Verify that there is proper airow to the evaporator
(fan is operating and lter is unrestricted).
2. If SH is above 12°F, the setting of the TXV may be too
high.
- Adjust the SH by turning counter-clockwise to
decrease SH.
- Wait 20 minutes for the system to balance and adjust
again, as required.
- If adjusting the valve has no eect on the SH, the
valve may be stuck because of dirt or debris or it may
have lost the Power Element charge.
3. After properly reclaiming the refrigerant, remove the
TXV and check for dirt and debris. Clean, if possible, or
replace the TXV and lter/drier.
If the system appears to be “ooding” (compressor frosting
or moisture is condensing at the suction connection):
1. Check the SH at the evaporator outlet. If SH is
between 5°F - 12°F, the TXV is controlling properly.
2. If SH is less than 5°F, the SH adjustment may be too
low.
- Adjust the SH by turning the adjustment stem clock-
wise to increase the SH.
- Wait 20 minutes for the system to balance and ad-
just again as required.
- If adjusting the valve has no eect on the SH, the
valve may be stuck open because of dirt or debris or
moisture in the refrigerant.
3. After properly reclaiming the refrigerant, remove the
TXV and check for dirt and debris. Clean, if possible,
or replace the TXV and lter/drier. Add a moisture
indicator to allow checking of moisture if this is believed
to be a probable cause.
10
DISCONNECT ALL OR THIS UNIT.
M SOURCES AILURE TO DO SO
CAUSE OR DEATH.
11
DISCONNECT ALL OR THIS UNIT.
M SOURCES AILURE TO DO SO
CAUSE OR DEATH.
12
DISCONNECT ALL OR THIS UNIT.
M SOURCES AILURE TO DO SO
CAUSE OR DEATH.
13
DISCONNECT ALL OR THIS UNIT.
M SOURCES AILURE TO DO SO
CAUSE OR DEATH.
14
We strongly recommend a biannual maintenance checkup be performed before the heating and cooling seasons begin by a qualied servicer.
An indoor air lter must be used with your comfort system. A properly maintained lter will keep the indoor coil of your comfort system clean.
A dirty coil could cause poor operation and/or severe equipment damage.
Your air lter or lters could be located in your furnace, in a blower unit, or in “lter grilles” in your ceiling or walls. The installer of your air
conditioner or heat pump can tell you where your lter(s) are, and how to clean or replace them.
Check your lter(s) at least once a month. When they are dirty, replace or clean as required. Disposable type lters should be replaced.
Reusable type lters may be cleaned.
You may want to ask your dealer about high eciency lters. High eciency lters are available in both electronic and non-electronic types.
These lters can do a better job of catching small airborne particles.
The compressor motor is hermetically sealed and does not require
additional oiling.
Indoor and outdoor fan motors are permanently lubricated and do not
require additional oiling.
This unit is equipped with an aluminum tube evaporator coil. The safest way to clean the evaporator coil is to simply ush the coil with water.
This cleaning practice remains as the recommended cleaning method for both copper tube and aluminum tube residential cooling coils.
An alternate cleaning method is to use one of the products listed in the technical publication
to clean the coils. The cleaners listed are the only agents deemed safe and approved for use to clean round tube aluminum coils. TP-109
is available on the web site in Partner Link > Service Toolkit.
NOTE: Ensure coils are rinsed well after use of any chemical cleaners.
Air must be able to ow through the outdoor unit of your comfort system. Do not construct a fence near the unit or build a deck or patio over the
unit without rst discussing your plans with your dealer or other qualied servicer. Restricted airow could lead to poor operation and/or severe
equipment damage.
Likewise, it is important to keep the outdoor coil clean. Dirt, leaves, or debris could also restrict the airow. If cleaning of the outdoor coil
becomes necessary, hire a qualied servicer. Inexperienced people could easily puncture the tubing in the coil. Even a small hole in the tubing
could eventually cause a large loss of refrigerant. Loss of refrigerant can cause poor operation and/or severe equipment damage.
Do not use a condensing unit cover to “protect” the outdoor unit during the winter, unless you rst discuss it with your dealer. Any cover used
must include “breathable” fabric to avoid moisture buildup.
• Check the thermostat to conrm that it is properly set.
• Wait 15 minutes. Some devices in the outdoor unit or in
programmable thermostats will prevent compressor operation for
awhile, and then reset automatically. Also, some power companies
will install devices which shut o air conditioners for several
minutes on hot days. If you wait several minutes, the unit may begin
operation on its own.
• Check the electrical panel for tripped circuit breakers or failed
fuses. Reset the circuit breakers or replace fuses as necessary.
• Check the disconnect switch near the indoor furnace or blower to
conrm that it is closed.
• Check for obstructions on the outdoor unit . Conrm that it has not been covered on the sides or the top. Remove any obstruction that can
be safely removed. If the unit is covered with dirt or debris, call a qualied servicer to clean it.
• Check for blockage of the indoor air inlets and outlets. Conrm that they are open and have not been blocked by objects (rugs, curtains or
furniture).
• Check the lter. If it is dirty, clean or replace it.
• Listen for any unusual noise(s), other than normal operating noise, that might be coming from the outdoor unit. If you hear unusual
noise(s) coming from the unit, call a qualied servicer.
CAUTION
15
Air Handler / Coil
ELECTRICAL
Line Voltage (Measure L1 and L2 Voltage) L1 - L2
Secondary Voltage (Measure Transformer Output Voltage) R - C
Blower Amps
Heat Strip 1 - Amps
Heat Strip 2 - Amps
BLOWER EXTERNAL STATIC PRESSURE
Return Air Static Pressure IN. W.C.
Supply Air Static Pressure IN. W.C.
Total External Static Pressure (Ignoring +/- from the reading above, add total here) IN. W.C.
TEMPERATURES
Return Air Temperature (Dry bulb / Wet bulb) DB °F WB °F
DB °F WB °F
Heating Supply Air Temperature DB °F
Temperature Rise DB °F
Delta T (Difference between Supply and Return Temperatures) DB °F
Air Handler / Coil - (Inverter Matched)
INVERTER AH / COIL ONLY
Check EEV and EEV wiring is secure (no adjustment required)
Additional Checks
Check wire routings for any rubbing
Check product for proper draining
Check screw tightness on blower wheel
Check factory wiring and wire connections
Check product for proper clearances as noted by installtion instructions
°F to °C formula: (°F - 32) divided by 1.8 = °C °C to °F formula: (°C multiplied by 1.8) + 32 = °F
Model Number
Serial Number
Cooling Supply Air Temperature (Dry bulb / Wet bulb)
16
Daikin Comfort Technologies Manufacturing, L.P.
19001 Kermier Rd., Waller, TX 77484
© 2023
NOTE: SPECIFICATIONS AND PERFORMANCE DATE LISTED HEREIN ARE SUBJECT TO CHANGE WITHOUT NOTICE.
Visit our website at www.daikincomfort.com, www.goodmanmfg.com or www.amana-hac.com for information on:
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You can also scan the QR code on the right for the product brand you
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Thank you for your recent purchase. Though not required to get the
protection of the standard warranty, registering your product is a relatively
short process, and entitles you to additional warranty protection, except that
failure by California and Quebec residents to register their product does not
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All rights reserved.
This manual suits for next models
7
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