Aspen AEW18 User manual

IO-123106 Effective 07/15/2015 1
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INSTALLATION GUIDE
AEW & AAW Series - Vertical Wall Mount Air
Handler
(Electric Heat)
1. Safety Instruction
!WARNING
Potential safety hazards are alerted using the following symbols. The symbol is used in conjunction with terms
that indicate the intensity of the hazard.
This symbol indicates a potentially hazardous situation, which if not avoided,
could result in serious injury, property damage, product damage or death.
This symbol indicates a potentially hazardous situation, which if not avoided,
may result in moderate injury or property damage.
CAUTION
!
Only factory authorized kits and acces-
sories should be used when installing or
modifying this unit unless it is so noted in
these instructions. Some localities may require a licensed
installer/service personnel.
CAUTION
!
Certied technicians or those individuals
meeting the requirements specied by
NATE may use this information. Property
and product damage or personal injury hazard may occur
without such background.
!WARNING
All power sources should be disconnect-
ed prior to servicing. Failure to do so may
cause personal injury or property dam-
age.
!WARNING
Product designed and manufactured to
permit installation in accordance with lo-
cal and national building codes. It is the
installer’s responsibility to ensure that product is installed
in strict compliance with national and local codes. Manufac-
turer takes no responsibility for damage (personal, product
or property) caused due to installations violating regula-
tions. In absence of local/state codes, refer to National Elec-
tric Code: NFPA 90A & 90B Uniform Mechanical Code.
!WARNING
When this unit is installed in an enclosed
area, such as a garage or utility room with
any Carbon Monoxide producing devices
(i.e. automobile, space heater, water heater etc.) ensure that
the enclosed area is properly ventilated.
!WARNING
The unit is designed for operation with
208/240 V, single phase, 60 Hz power
supply. Aspen will not be responsible for
damages caused due to modication of the unit to operate
with alternative power sources.
!WARNING
Unit is not approved for outdoor installa-
tions.
!WARNING
2. Introduction
The AEW Series air handlers are versatile upow only models that
can be recess mounted or ush mounted onto walls. These air han-
dlers have the following standard features:
Front or bottom return air position. Offset hanging brackets attach to
unit and wall to allow hanging inside closet.
Can be ARI matched with most brands of air conditioners or heat
pumps for use with either R22 or R410a when proper metering de-
vice is used.
I. Application Versatility
II. Motor
III. Cabinet
X13 speeds and torques are controlled by software embedded in the
motor to maintain constant torque. Motors are pre-programmed at
the factory.
Sturdy, short galvanized steel cabinet with painted front panels. Cab-
inet fully insulated with 1/2” faced insulation to prevent sweating and
mold growth, to encapsulate glass bers, and to provide excellent
R-value. Stick pins ensure insulation remains in place.
Units ship with disposable lter in lter rack.
IV. Modular Electric Heat Kits
Heat kits available with either circuit breakers or terminal blocks.
Available in 3, 5, 8, & 10 KW. Models with electric heat include se-
quencers and temperature limit switches for safe, efcient operation.
Modules are easily installed in the eld using molex plugs or can be
ordered factory-installed. Controls are accessible from the front for
easy service.
Electrical connections can be made from the top or left. Disconnect
does not protrude through the wall panel.
Fan time delay relay standard for increased efciency.
V. Blower
VI. Electronic Circuit Board
Direct drive multi-speed blowers circulate air quietly and efciently.
Motor speeds can be easily selected via motor terminals. Swing
mounted blowers can be easily removed for service.
Electronic circuit board provides 30 sec. ON/OFF blower time delay
extracting more heat/cool from the coil

2IO-123106 Effective 07/15/2015
VII. DX Coil
VIII. Warranty
High efciency ried copper tubes/enhanced aluminum ns provide
maximum heat transfer. All coils immersion tested at 500 psi then
nitrogen pressurized and factory sealed for maximum reliability. Coil
mounted Schrader allows pre-installation pressure testing.
Available with either check style owrater or TXV metering device.
Field-installable TXVs are also available.
Galvanized metal drain pan with bottom primary and secondary
drain connections or alternate right side primary. All connections 3/4”
FPT. Access door allows for coil cleaning.
Five year limited parts warranty.
4. Installation Preparation
4A. Clearances
4B. Recess Mounting or Wall Mounting Option
4D. Condensate Drain
Read all the instructions in this guideline carefully while paying spe-
cial attention to the WARNING and CAUTION alerts. If any of the
instructions are unclear; clarify with certied technicians. Gather all
the tools needed for successful installation of the unit prior to begin-
ning the installation.
This unit is designed for zero clearance installation on three sides
and adequate clearance to provide access for service in the front.
A minimum of 2.5 – 3.5 feet clearance is recommended on the front
end (Fig 4A-1).
These units are designed to be installed in a small room where they
can be mounted above a water heater or recessed into a wall. The
unit should be installed in Vertical Upow position ONLY.
If installing the air handler into a recessed wall, the unit must leave
clearance to allow the removal of the front panels. The bottom of the
unit should also rest on a sturdy platform or oor. The unit must be
level to allow condensate drainage.
These air handlers come with an offset mounting bracket that at-
taches the air handler to the wall when the unit is ush mounted to
the wall.
The drain lines must be installed with ¼” per foot pitch to provide free
drainage. A condensate trap MUST be installed on the primary drain
line to ensure proper drainage of the condensate. The trap must be
installed in the drain line below the bottom of the drain pan (Fig.
4C-1)
Since coil is upstream of the blower, all
drains MUST be trapped or sealed. Failure
to do so will result in condensate overow
from the drain pan. Aspen will NOT be responsible for any
damages resulting from failure to follow these instructions.
CAUTION
!
The drain pan has primary (white) and secondary (red) drain connec-
tions. If a secondary drain line is required, it should be run separately
from the primary and should terminate in a highly visible location.
Condensate disposal through the secondary drain line indicates that
Fig 4A-1. Minimum Clearance for Air Handler
Fig 4C-1. Condensate Drain Trap
3. Inspection
Drain lines from the auxiliary drain pan
should NOT be connected to the primary
drain line of the coil.
CAUTION
!
üOn receiving the product, visually inspect it for any major shipping
related damages. Shipping damages are the carrier’s responsibility.
Inspect the product labels to verify the model number and options
are in accordance with your order. Manufacturer will not accept dam-
age claims for incorrectly shipped product.
ü An auxiliary drain pan must be provided by the installer and placed
under the entire unit with a separate drain line that is properly sloped
and terminated in an area visible to the home owner. The auxiliary
pans provide extra protection to the area under the unit should the
primary and secondary drain plug up and overow. As expressed
in our product warranty; ASPEN WILL NOT BE BILLED FOR ANY
STRUCTURAL DAMAGES CAUSE BY FAILURE TO FOLLOW
THIS INSTALLATION REQUIREMENT. The drains from the auxil-
iary drain pan must be installed according to the local building codes.
If the drain pan is constructed of nylon
or plastic; use Teon tape to connect the
drain lines to the threads in the drain pan.
DO NOT USE SOLVENT BASED PIPE DOPE. THIS WILL RE-
DUCE THE LIFE OF THE PAN.
CAUTION
!
4C. Condensate Drain Preparation

IO-123106 Effective 07/15/2015 3
4E. Ductwork
Duct systems should be installed in accordance with standards for
air-conditioning systems, National Fire Protection Association Pam-
phlet No. 90A or 90B. They should be sized in accordance with Na-
tional Environmental Sys-
tem Contractors Association
Manual K, or whichever is
applicable.
On any job, non-ammable
exible collars should be
used for the return air and
discharge connections to
prevent transmission of vi-
bration (Fig 4E-1). Although
these units have been spe-
cially designed for quiet
vibration-free operation,
air ducts can act as sound-
boards, can, if poorly in-
stalled, amplify the slightest
vibration to the annoyance
level.
All main supply and return air drops should be properly sized as
determined by the designer of the duct system and should not nec-
essarily be the size of the duct ange openings of the unit. (The
duct size should never be smaller than the ange openings of the air
handler supply and return air openings.)
A lter rack is provided for a 1”X20”X20” nominal size lter (Fig 4E-
4). Inspect and clean or replace iter every month. A blocked lter
can reduce air ow to the coil and hinder the performance of the
system.
If an accessory grill is being used, the front access panel should be
removed and discarded (Fig 4E-3).
These models have a bottom or front return. Discard the drain ac-
cess panel in the bottom of the unit if this is a bottom return applica-
tion (Fig 4E-2). In case of a front return application, the front access
panel should be removed and discarded.
It is recommended that wherever supply and return air sheet metal
ducts pass through unconditioned areas, they be insulated to pre-
vent excessive heat loss during heating operation. When applied in
conjunction with summer air conditioning, sheet metal duct routed
through unconditioned areas should be insulated and have an out-
side vapor barrier to prevent formation of condensation.
5. Installation
Ensure that the unit is adequately sized.
The tonnage of the outdoor unit should
never exceed the tonnage of this unit.
CAUTION
!
The coil was manufactured with a dry ni-
trogen pre-charge. Release the pressure
through the Schrader valve test port prior
to installation. If holding pressure is not present, return coil
to distributor for exchange.
!WARNING
Some Aspen coils may include a Schrader
valve on the suction manifold. Ensure that
the Schrader valve and valve core (where
present) are protected from heat during brazing and instal-
lation to prevent leakage. Use a core removal tool to tempo-
rarily remove the core when brazing. Replace the core once
brazing is completed.
CAUTION
!
Fig 4E-1.
Fig 4E-2.
Fig 4E-3.
Fig 4E-4.
the primary drain line is plugged and needs cleaning. If a second-
ary drain line will not be provided, plug the secondary drain. Drain
plugs are NOT to be reused without plumbers tape or putty. Drain
line connection should be nger tightened, then turned no more than
one complete turn as needed to ensure a rm connection. DO NOT
overtighten connection or damage may occur.
Insulation on the suction line MUST extend
into the cabinet and continue as far as
possible to eliminate condensate dripping
onto the access door.
CAUTION
!
ü Clean coil ns with degreasing agent or mild detergent and rinse
ns clean prior to installation.
üThe refrigerant line sizes should be selected according to the rec-
ommendations of the outdoor unit manufacturer.
üCare must be taken to ensure all connection joints are burr-free
and clean. Failure to do so may increase chances of a leak. It is
recommended to use a pipe cutter to remove the spun closed end of
the suction line.
üTo reduce air leakage, rubber gommets may be present where the
lines pass through the coil case. To avoid damage, remove grom-
mets prior to brazing by sliding over the lines. Use a quenching cloth
or allow the lines to cool before reinstalling the grommets.
üUse of wet rags/quenching cloth is highly recommended to prevent
weld-related damages to the casing and Schrader valve (if present).

4IO-123106 Effective 07/15/2015
7. Connecting Ducting
8. Metering Devices/Liquid Line Connection
1. Secure supply air ducting to the top of the air handler. Canvas con-
nectors are recommended for reducing potential noise transmission.
2. If the bottom return air opening is
being used, remove the bottom pan-
el. If a front return is being used, this
panel will remain in place.
3. Secure the return air ducting to the air handler cabinet.
4. Secure the bracket with
screws sufcient to hold 4X the
weight of the air handler.
5. Position the air handler on the
wall with the bracket on the air
handler slightly higher than the
bracket secured on the wall.
Lower the air handler so that the
brackets engage. Check the unit
for level, both side to side and
front to back.
Note: Photos are for basic illustration purposes only. Actual equip-
ment conguration may differ from that shown.
Aspen coils are available with two kinds of metering devices a) ow-
rator or b) TXV. The following instructions are separated into sec-
tions by metering device.
Use Piston sizes recommended by the
outdoor unit manufacturer whenever pos-
sible. The piston should be sized accord-
ing to the capacity of the outdoor unit.
CAUTION
!
Fig 7A-1. Flowrator assembly components
Failure to install the proper piston can
lead to poor system performance and
possible compressor damage.
!WARNING
I. Installation
I-1. Disassemble owrator body
using two wrenches and un-
screwing with a counterclockwise
motion.
8A. Flowrator Coils
I-4. Braze the stub-out portion to the liquid line and let cool.
I-3. Slide attachment the nut onto
the liquid line stub out.
I-5. Taking care that the white
Teon seal is still in place inside
the owrater body, rmly seat the
stub and screw the attachment
nut to owrater body.
O-ring
Be aware of the Teon O-ring. Be sure to
replace the O-ring to attain a proper
seal. (The Teon O-ring is located between
the two halves of the owrator)
CAUTION
!
I-2. Replace the Teon O-ring
(located between the halves).
Discard Schrader if present.
O-ring
2. Determine where the air han-
dler is to be placed on the wall.
Place the hanging bracket on the
wall and align the holes of the
bracket with the wall studs. Level
the hanging bracket and mark the
holes to drill pilot holes for the
screws.
3. Drill the pilot holes.
6. Mounting Air Handler To Wall
1. Install the air handler in a level position side to side and front to
back. If this step is not followed, condensate water damage may oc-
cur. (Both ush mount and recess mount congurations.)

IO-123106 Effective 07/15/2015 5
I-6. Tighten the nut to a torque of approximately 10-30 ft-lbs. Do NOT
overtighten the nut. Overtightening will impede the piston movement
during operation.
During some installations, a piston change may
be required. If so, the installer MUST change the
piston. Use piston sizes recommended by the
outdoor unit manufacturer. If a sizing chart is not
available, use the piston size chart provided be-
low to size the required piston. The size of the
piston is stamped on the piston body (Fig 8A-2).
II. Piston Replacement
Fig 8A-2
Use the chart below when matching coil with an outdoor unit with a
different nominal capacity than the coil.
Note: Photos are for basic illustration purposes only. Actual equip-
ment conguration may differ from that shown.
II-4. Slide the 13/16” nut over
the lineset and separate the two
halves of the owrator.
Be aware of the Teon O-ring. Be sure to
replace the O-ring to attain a proper
seal. (The Teon O-ring is located between
the two halves of the owrator)
CAUTION
!
Pay close attention to the piston orienta-
tion. The pointed end of the piston MUST
go into the distributor body, towards the
coil. Failure to ensure this orientation will cause the piston
to be bypassed during operation which might damage the
outdoor unit.
CAUTION
!
II-6. Replace the piston with one
of the correct size. Do not force
the new piston into the body.
Make sure the piston moves
freely in body.
II-1. Evacuate the system as per manufacturer guidelines and rec-
ommendations
II-2. Turn the 13/16” nut once to release any residual pressure in the
coil.
II-3. After ensuring that the coil
is free of any residual pressure,
disassemble the owrator body
completely using two wrenches.
Take great care not to distort the
feeder tubes. The wrench used
to clasp the nut should be turned
in counter-clockwise direction to
unscrew the nut.
II-5. Pull the piston out using a
small wire or pick. Verify the pis-
ton size (size is typically stamped
on the body of the piston - Fig
8A-2). If a different piston size
is required by the outdoor unit
manufacturer, replace the piston
using the small wire provided with
the piston kit.
II-7. Assemble the two halves correctly and ensure that the white
Teon O-ring is present between the two halves (See I-5). Slide the
13/16” nut onto the distributor body.
II-8. Tighten the nut to a torque of approximately 10-30 ft-lbs. Do NOT
overtighten the nut. Overtightening will impede the piston movement
during operation.
II-9. If present, slide the rubber grommet back to position to prevent
air leakage.
7B. TXV Coils
Ensure that the TXV selected is compat-
ible with the refrigerant used in the out-
door system (R22 or R410A). TXV caps are
painted green for R22 or pink for R410A. In absence of col-
or, the caps will be marked with the compatible refrigerant.
CAUTION
!
The sensing bulb and TXV body MUST be
protected from overheating during braz-
ing. The sensing bulb and TXV body must
be covered using a quench cloth or wet cloth when brazing.
Pointing the brazing ame away from the valve and sensing
bulb provide partial protection only.
!WARNING
Fig 8B-1. Components of a typical TXV assembly

6IO-123106 Effective 07/15/2015
The valves should be sized according to
the capacity of the outdoor unit. Failure to
install the right valve can lead to poor per-
formance and possible compressor damage.
CAUTION
!
Ensure that the TXV bulb is in direct con-
tact with the suction/vapor line. Gap be-
tween the bulb and tube should be avoid-
ed. Failure to do so will impair the proper functioning of the
TXV valve.
CAUTION
!
I. TXV Bulb Horizontal Mounting
The orientation and location of the TXV bulb has a major inuence
on the system performance.
If the TXV sensing bulb is mounted verti-
cally; the capillary MUST be directed up-
wards. The bulb must be mounted on the
wall opposite to that being directly hit by the refrigerant and
oil leaving the distributor tubes.
CAUTION
!
II. TXV Bulb Vertical Mounting
It is recommended that the TXV bulb be installed parallel to the
ground (on a horizontal plane). The bulb position should be above
and between 4 o’clock and 8 o’clock. Fig. 8B-2 shows the recom-
mended position for the TXV bulb installation in the horizontal plane.
The TXV sensing bulb SHOULD be mounted on the suction line ap-
proximately 6” from the TXV or coil housing using the metal clamp
provided. In order to obtain a good temperature reading and correct
superheat control, the TXV sensing bulb must conform to ALL of the
following criteria:
1. The sensing bulb MUST be in direct and continuous
contact with the suction line.
2. The sensing bulb should be mounted horizontally on
the suction line.
3. The sensing bulb MUST be mounted above and between
the 4 and 8 o’clock position on the circumference of the
suction line.
4. The sensing bulb MUST be insulated from outside air.
A properly mounted sensing bulb will prevent false readings caused
by liquid refrigerant that may have formed inside the suction/vapor
line. Insulation will protect the sensing bulb from false readings due
to contact with warm air.
Fig 8B-3. Recommended location
for vertical TXV bulb mount
As recommended in Section
8B-I, the TXV sensing bulb
should be mounted in a hori-
zontal plane in relation to the
suction/vapor line. However,
some installation congura-
tions may require that the
sensing bulb be mounted ver-
tically. In this instance, place
the bulb opposite the piping
wall being hit by refrigerant
and oil leaving the distributor
tubes, and with capillary tubes
directed upwards as shown in
Fig. 8B-3.
Fig 8B-2. Recommended location for horizontal TXV bulb mount
III-3. Replace the Teon O-ring
seal in place (located between
the halves).
O-ring
III-2. Remove the existing ow-
rator piston using a small wire
or pick.
Note: Photos are for basic illustration purposes only. Actual equip-
ment conguration may differ from that shown.
III. Field-Installed TXV Retrot
When installing an expansion valve, it is not necessary to slide the
coil out of the housing.
III-1. Disassemble the owrator
body using two wrenches. Un-
screw the body with a counter-
clockwise motion.

IO-123106 Effective 07/15/2015 7
III-4. Inspect the TXV box to conrm that the valve is compatible
with the refrigerant in the system.
Male
(Inlet) Female
(Outlet) III-5. Remove the valve from
the box and note the loca-
tion of the inlet side (threaded
male port) and the outlet side
(female swivel nut port).
III-8. Braze the stub-out portion to the liquid line and let cool.
III-7. Slide attachment the nut onto the liquid line stub out
(See 8A, I-3)
Do not attempt to touch brazed joints
while hot. Severe burns may result.
!WARNING
O-ring
III-6. After ensuring that the
Teon O-ring seal is still in place
inside the owrator body, screw
the female swivel nut onto the
owrator body.
O-ring III-9. Remove the additional Tef-
lon O-ring seal from the box and
place on the shoulder just inside
the TXV inlet port. Screw the nut
attached to the stub-out portion of
the owrator body onto the inlet
port of the TXV.
A. Remove the valve stem from
the Schrader port mounted on the
suction line.
B. Screw are nut on TXV equal-
ization tube on to the Schrader
valve stem.
III-10. Tighten all connections taking care to use proper back up.
III-12a. Some Aspen coils come with a Schrader valve on the suc-
tion line. If a Schrader port is present:
III-12b. In some cases, a suction line schrader port may not be
present. If a Schrader port is NOT present:
When handling or manipulating the equal-
izer tube, take great care not to kink or
make extreme bends in the tubing.
CAUTION
!
III-11. Remove the valve identication sticker from the valve and
place it adjacent to the Aspen model number on unit name plate.
A. Install a eld-supplied braze-on schrader
valve like that shown on the suction line near the
intended sensing bulb mounting location. Fol-
low valve manufacturer instructions and recom-
mendations for installation.
B. Attach equalizer tube to valve as described in
section III-12a above.
III-13. Mount the sensing bulb as described in section 8B-I or 8B-II.

8IO-123106 Effective 07/15/2015
9. Connecting Refrigerant Lines
11. Electrical Line Voltage Wiring
1. Release nitrogen hold-
ing charge by depressing the
Shrader Valve at the liquid line
connection on the air handler.
If no gas releases from the air
handler, contact distributor re-
garding potential leak.
2. Cut off Shrader Valve tting at
the liquid line connection. Use a
tubing cutter for this step. Clean
the burr from the cut tubing to
reduce the chance of future
leaks. Connect the liquid line to
the tubing at the indoor unit.
3. Use a tubing cutter to remove
the spun end from the suction
line connection at the air han-
dler. Clean the burr from the cut
tubing to reduce the chance of
future leaks.
4. To avoid heat damage to grommets where present, remove these
prior to brazing by sliding them over the refrigerant lines and out of
the way.
5. Check to determine if the
evaporator coil has a Shrader
tting on the suction manifold.
If yes, remove the valve core
to prevent heat damage during
brazing. Replace the valve core
once the piping has cooled.
6. If the air handler has a TXV
metering device, remove the
sensing bulb from the suction
line prior to brazing to prevent
heat damage from occurring.
Replace the sensing bulb once
the piping has cooled.
7. Flow nitrogen through the piping when brazing.
8. Braze both refrigerant line connections using proper brazing pro-
cedures.
9. When all line connections are brazed, perform a proper system
evacuation procedure per the outdoor unit manufacturer instructions.
10. Seal the penetration open-
ings where the lineset piping en-
ters the air handler cabinet.
These units are designed for single or three phase 208/240 volts, 60
HZ power supply. Wire selection and wiring must be in accordance
with the National Electric Code and/or local codes. Unit terminals are
designed to accommodate copper and aluminum wiring. If aluminum
wiring is used: please observe special precautions relative to sizing,
wire connections and corrosion protection.
All models with 5,8 or 10 kW electric heat are arranged for single
circuit connections. Models larger than 10 kW are arranged for multi-
circuit protection. Refer to top part of wiring diagram at the end of this
guide for detailed information.
1. Following outdoor unit manufacturer instructions and recommen-
dations, charge the system with dry nitrogen to a maximum pressure
of 150 PSIG.
3. If any leaks or are discovered, relieve system pressure and repair
leaks. Repeat steps 1-3.
4. With no leaks or weak connections present, evacuate the system
and charge as per the outdoor unit manufacturer instructions and
specications.
10. Leak Check
2. Check all brazed and screw-
on line connections by applying a
soap solution to the joint. A leak
will produce bubbles in the soap
solution.

IO-123106 Effective 07/15/2015 9
Line voltage wiring should be
routed through the access holes
at the top of the air handler.
Proper electrical conduit con-
nection ttings should be used.
Connect the power wiring to the
line side connections on the air
handler. The electrical ground
wire should be connected to the
grounding lug. Ensure both the
eld supplied ground wire and
air handler GREEN ground wire
are both secured to the ground-
ing lug of the air handler.
If the line voltage being supplied
to the air handler is 208 volt sin-
gle phase, the line voltage tap
on the low voltage transformer
needs to be moved from the 240
volt tap to the 208 volt tap. If this
is not done, the secondary out-
put voltage of the transformer
will be too low.
208VAC
Tap
240VAC
Tap
12A. Single Stage Cooling with Electric Heat
12. Low Voltage Connections
The air handler comes factory setup for a single stage cooling sys-
tem. If factory installed accessory electric heaters are preinstalled,
the unit will also have a low voltage wire for the electric heat (Fig
12A-1).
During cooling mode operation, the indoor blower G wire will ener-
gize a time delay relay inside the air handler. After a short time delay
period, the time delay relay will send out a 24 volt signal to the low
voltage terminal on the X13 motor. Fan delay periods are 30 sec-
onds ON delay and 120 seconds OFF delay. (See Schematic)
The Y wire from the thermostat is not connected at the air handler.
This wire goes directly to the outdoor unit 24 volt wiring to turn on
the outdoor condensing unit when a call for cooling takes place. The
24 volt common for the outdoor unit circuits is connected at the air
handler Brown wire.
The electric heater low voltage wiring W terminal is wired directly
from the thermostat to the air handler. The blower will delay on a
heat call ON for a period of 5 seconds. The OFF delay period is 60
seconds.
12B. Two Stage Condensing Units
Operating CFM based upon each speed tap number is shown on
the electrical wiring diagram of the unit. Final air volume adjustments
should be made by referencing total external static pressure (Table
12B-1).
If the outdoor condensing unit is a two stage model, a eld provided
Y2 wire can be connected to the X13 motor using an electrical spade
connector. The number 4 and 5 terminal on the X13 motor are speed
taps that will increase the blower speed for second stage cooling
operation. Both the G and Y2 terminals will be energized at the same
time during a call for second stage blower speed operation. The X13
motor will run at the speed where the Y2 wire is connected (Fig 12B-
1).
Fig 12A-1.
Fig 12A-2.
Fig 12B-1.
Table 12B-1.

10 IO-123106 Effective 07/15/2015
13. Condensate Drain
1. Select desired condensate drain openings. Bottom Primary and
Secondary can both be used, or the bottom primary and side sec-
ondary can be used.
2. Pipe condensate system using proper PVC ttings.
3. Ensure a minimum 2” trap is in-
stalled in the condensate drain. Lo-
cate the trap near to the connection
opening on the air handler. See illus-
tration.
Air volume needs to be set to the level recommended by the outdoor
unit equipment manufacturer. Most systems will require around 400
CFM of indoor air for every 1 ton of system cooling capacity. The air
volume must be set prior to attempting system charge.
This air handler uses a Constant Torque Motor called an X13 motor.
This motor will try to maintain proper motor torque to achieve pro-
grammed air volume levels at varying levels of external static pres-
sure. The air volume level produced by the air handlers at varying
external static pressure levels is shown in Table 14-1.
Use a Magnehelic Gauge with a 1” scale and two static pressure
tips to measure the static pressure during the air volume adjustment
procedure (Fig. 14-1). The high port static pressure tip should be
placed in the supply duct near the outlet of the air handler. The low
port static pressure tip should be placed in the return air duct near
the entrance to the air handler. The factory provided air lter should
be in place inside of the air handler.
1. Select a starting speed tap from the CFM table.
The X13 blower motor has selectable speed taps labeled 1 thru 5
(Fig. 14-2). The speed taps are energized by 24 volts received from
the time delay relay. When two stage cooling units are used, both the
rst and second stage fan speed taps will be energized at the same
time. The motor will run at the speed generated at the highest motor
speed tap.
14. Air Volume Adjustment
2. Call for fan only operation at the thermostat.
1. Bring airow up to the maximum CFM possible according to Table
14-1.
2. Evacuate refrigeration system to micron level required by outdoor
unit manufacturer.
3. Release system charge from outdoor unit and call for cooling.
4. Use outdoor unit equipment manufacturer specic charging charts
if available and make proper charge adjustment based upon outdoor
unit instructions.
5. If outdoor unit instructions and charts are not available, use Aspen
provided charts. Make certain indoor air temperature is near comfort
level setpoint 75F, prior to establishing superheat and subcooling
levels.
3. Read the external static pressure level on the Magnehelic gauge.
4. Make speed tap selection changes to get the air volume as close
as possible to the required level.
5. If the static pressure is above .5” wc , excessive turbulence or duct
friction needs to be reduced. (Obstructions in the duct system can
also cause excessive static pressure.)
6. When proper air volume is established, move on to the charging
procedure.
15. System Charging
An improperly charged system may cause
degradation in system performance and
damage the compressor. After installation
of the coil, refer to the outdoor unit manufacturer for charging
techniques and amount of charge. If outdoor unit manufacturers
charging instructions are unavailable; then refer to instructions
below to charge the system.
CAUTION
!
15A . Flowrator Coils
Add refrigerant until the superheat measured at the outdoor unit suc-
tion/vapor line matches the superheat listed in Table 15B-1.
Table 14-1.
Fig. 14-2
Fig. 14-1

IO-123106 Effective 07/15/2015 11
15B . Expansion Valve Coils
Add refrigerant until the subcooling measured at the outdoor unit
liquid line matches the subcooling recommendation of the outdoor
manufacturer (typically 7º – 10º F). If chart is unavailable refer to
Table 15B-1.
Table 15B-1.
After all connections are made, start-up and checkout must be per-
formed before proper evaluation of the entire system can be made.
Make sure that heat anticipator is properly set as noted on thermo-
stat instructions. Load requirements can vary in each residence and
it may be necessary for the installer or homeowner to make slight ad-
justments to the heat anticipator setting for longer or shorter cycles.
It is recommended to change the setting no more than plus or minus
0.05 amps at a time. Greater changes can cause the unit to rapid
cycle or remain on excessively. Measure anticipator circuit current
with electric heaters energized and set anticipator to proper level.
16. Adjustment Of Heat Anticipator
17. Final System Checkout
1. Make certain all cabinet openings are properly sealed and any
grommets moved during installation are moved into proper place.
2. With cooling system operating, check for condensate leakage.
3. Perform leak detection inspection of refrigerant circuit and con-
necting piping.
4. Secure all cabinet doors

12 IO-123106 Effective 07/15/2015
18. Wiring diagram for AEW models
HIGH VOLTAGE disconnect all power sources prior to servicing. Failure might lead to safety hazard
Fig 18-1.

IO-123106 Effective 07/15/2015 13
19. Wiring diagram for AAW models
HIGH VOLTAGE disconnect all power sources prior to servicing. Failure might lead to safety hazard
Fig 19-1.

14 IO-123106 Effective 07/15/2015
373 Atascocita Rd.
Humble, TX 77396
Phone: [phone]
Toll Free: 800.423.9007
Fax: [phone]
www.aspenmfg.com
© Copyright 2014 Aspen Manufacturing. All Rights Reserved
Revised 07/15/2015. Subject to change without notice and without incurring obligation.