INSTALLATION GUIDE
CS & CT SERIES - DEDICATED HORIZONTAL COIL
1. Safety Instruction
Potential safety hazards are alerted using the following symbols. The symbol is used in conjunction with terms
that indicate the intensity of the hazard.
WARNING
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CAUTION
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Certied technicians or those individuals
WARNING
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and product damage or personal injury hazard may occur
without such background.
WARNING
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WARNING
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installer’s responsibility to ensure that product is installed
in strict compliance with national and local codes. Manufacturer takes no responsibility for damage (personal,
product or property) caused due to installations violating
regulations.
meeting the requirements specied by
NATE may use this information. Property
All power sources should be disconnected prior to servicing. Failure to do
so may cause personal injury or property
damage.
Product designed and manufactured to
permit installation in accordance with local and national building codes. It is the
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.
2. Inspection
ü On 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 damage claims for incorrectly shipped product.
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 auxiliary drain pan must be installed according to the
local building codes.
Drain lines from the auxiliary drain pan
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ü Install coil with a mininum 1/4” slope towards the drain connection.
Condensate drain lines must be installed in accordance with local
building codes.
ü 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. 4-1 illustrates the typical drain trap installation.
should NOT be connected to the primary
drain line of the coil.
Fig 4-1. Typical drain line trap set up
3. Installation Preparation
ü Read all the instructions in this guideline carefully while paying
special attention to the WARNING and CAUTION alerts. If any of
the instructions are unclear, clarify with a certied technician before
proceeding. Gather all tools needed for successful installation of the
unit prior to beginning the installation.
4. Condensate Drain Preparation
ü CS and CT coils are designed with a built in Primary drain pan
only. Please Check local building codes for auxiliary drain pan requirements. The auxiliary drain pan must have 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
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If the drain pan is constructed of nylon
CAUTION
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DO NOT USE SOLVENT BASED PIPE DOPE. THIS WILL REDUCE THE LIFE OF THE PAN.
or plastic; use Teon tape to connect the
drain lines to the threads in the drain pan.
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ü The drain pans have a primary (white) and auxiliary (red) drain
connections. If the auxiliary line is required, it should be run spectrally from the primary drain line and terminated in a highly visible location. Condensate disposal through auxiliary line indicates that the
primary line is plugged and needs cleaning. If a secondary drain line
will not be provided plug the secondary drain. Drain plugs are NOT
to be reused without plumbers tape. 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.
5. Coil Installation
The coil is manufactured with dry nitro-
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or to installation. If holding pressure is not present, return
coil to distributor for exchange.
gen pre-charge. Release the pressure
through the Schrader valve test port pri-
CAUTION
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by nonconformance to local building codes.
Duct work must be installed in accordance
with the local building codes. Aspen Mfg is
will not be liable for damages caused due
ü Clean coil ns with degreasing agent or mild detergent and rinse
ns clean prior to installation.
ü The refrigerant line sizes should be selected according to the recommendations of the outdoor unit manufacturer.
ü Care 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.
ü To reduce air leakage, rubber grommets may be present where the
lines pass through the coil case. To avoid damage, remove grommets prior to brazing by sliding over the lines. Use a quenching cloth
or allow the lines to cool before reinstalling the grommets.
ü Use of wet rags/quenching cloth is highly recommended to prevent
weld-related damages to the casing and Schrader valve (if present).
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present) are protected from heat to prevent leakage.
Coil should be installed on the discharge
side of the furnace
Some Aspen coils may include a Schrader
valve on the suction manifold. Ensure that
the Schrader valve and valve core (where
Airow Direction
Airow enters through the inlet of the coil and exits at the outlet,
entering the interior of the enclosure for routing to the attached
ductwork.
5B. Horizontal Orientation
5A. Horizontal Only Installation
A dual drain pan (pan within a pan) is used for condensate collection. Condensate drain ports are located on both left and right sides
of the unit.
Primary
Auxiliary
Note: The primary drain is the higher of the two ports on the
CS. The primary drain is lower one on the CT (CT does not
have a internal secondary drain pan)
A condensate trap, as shown MUST be installed on the primary drain
line to ensure proper drainage of the condensate. Drain lines should
maintain a 1/4” per foot drop for proper condensate drain ow.
Fig 5B-1. Horizontal Left Application
Fig 5B-2. Horizontal Right Application
Refer to Furnace/Air Handler manufacturer literature for specic coil
installation guidelines and recommendations.
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6. Suction Line Connection
The sensing bulb and TXV body MUST be
WARNING
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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.
CAUTION
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present) are protected from heat to prevent leakage.
protected from overheating during brazing. The sensing bulb and TXV body must
Some Aspen coils may include a Schrader
valve on the suction manifold. Ensure that
the Schrader valve and valve core (where
I. Installation
Note: Photos are for basic illustration purposes only. Actual equip-
ment conguration may differ from that shown.
I-1. Disassemble owrator
body using two wrenches and
unscrewing with a counterclockwise motion.
1. Ensure suction line connection joints are burr-free and clean.
Failure to do so may increase chances of a leak and introduce contaminants to the system. It is recommended to use a pipe cutter to
remove the spun closed end of the suction line.
2. Swedge (or use a eld supplied coupler) and braze the eld sup-
plied refrigerant suction line tubing to the coil stub using approved
industry practices.
WARNING
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Do not attempt to touch brazed joints
while hot. Severe burns may result.
7. Metering Devices/Liquid Line Conection
Aspen coils are available with two kinds of metering devices a) owrator or b) TXV. The following instructions are separated into sections by metering device.
7A. Flowrator Coils
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CAUTION
O-ring
I-2. Replace the Teon O-ring
(located between the halves).
Discard Schrader if present.
Be aware of the Teon O-ring. Be sure to
replace the O-ring to attain a proper
seal. (The Teon O-ring is located between
the two halves of the owrator)
I-3. Slide the attachment nut onto
the liquid line stub out.
Fig 7A-1. Flowrator assembly components
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ing to the capacity of the outdoor unit.
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Use Piston sizes recommended by the
outdoor unit manufacturer whenever possible. The piston should be sized accord-
Failure to install the proper piston can
lead to poor system performance and
possible compressor damage.
I-4. Braze the stub-out portion to the liquid line and let cool.
I-5. Taking care that the white
Teon seal is still in place inside
the owrater body, rmly seat the
stub and screw the attachment
nut to owrater body.
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.
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II. Piston Replacement
Note: Photos are for basic illustration purposes only. Actual equip-
ment conguration may differ from that shown.
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 below to size the required piston. The size of the
Fig 7A-2
piston is stamped on the piston body (Fig 7A-2).
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.
Use the chart below when matching coil with an outdoor unit with a
different nominal capacity than the coil.
II-1. Evacuate the system as per manufacturer guidelines and recommendations
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.
CAUTION
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coil. Failure to ensure this orientation will cause the piston
to be bypassed during operation which might damage the
outdoor unit.
II-7. Assemble the two halves correctly and ensure that the Teon
O-ring is present between the two halves (See I-5). Slide the 13/16”
nut onto the distributor body.
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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.
Pay close attention to the piston orientation. The pointed end of the piston MUST
go into the distributor body, towards the
Be aware of the Teon O-ring. Be sure to
replace the O-ring to attain a proper
seal. (The Teon O-ring is located between
the two halves of the owrator)
7B. TXV Coils
II-4. Slide the 13/16” nut over
the lineset and separate the two
halves of the owrator.
II-5. Pull the piston out using a
small wire or pick. Verify the piston size (size is typically stamped
on the body of the piston - Fig
7A-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.
Fig 7B-1. Components of a typical TXV assembly
The sensing bulb and TXV body MUST be
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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.
CAUTION
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painted green for R22 or pink for R410A. In absence of color, the caps will be marked with the compatible refrigerant.
protected from overheating during brazing. The sensing bulb and TXV body must
Ensure that the TXV selected is compatible with the refrigerant used in the outdoor system (R22 or R410A). TXV caps are
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The valves should be sized according to
CAUTION
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formance and possible compressor damage.
the capacity of the outdoor unit. Failure to
install the right valve can lead to poor per-
I. TXV Bulb Horizontal Mounting
The orientation and location of the TXV bulb has a major inuence
on the system performance.
Ensure that the TXV bulb is in direct con-
CAUTION
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ed. Failure to do so will impair the proper functioning of the
TXV valve.
It is recommended that the TXV bulb be installed parallel to the
ground (on a horizontal plane). The bulb position should be at
2 o’clock or 10 o’clock. Fig. 7B-2 shows the recommended position
for the TXV bulb installation in the horizontal plane.
tact with the suction/vapor line. Gap between the bulb and tube should be avoid-
II. TXV Bulb Vertical Mounting
As recommended in Section
7B-I, the TXV sensing bulb
should be mounted in a horizontal plane in relation to the
suction/vapor line. However,
some installation congurations may require that the
sensing bulb be mounted vertically. 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. 7B-3.
Fig 7B-3. Recommended location
for vertical TXV bulb mount
If the TXV sensing bulb is mounted verti-
CAUTION
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wall opposite to that being directly hit by the refrigerant and
oil leaving the distributor tubes.
cally; the capillary MUST be directed upwards. The bulb must be mounted on the
Bulb position at
2 o’clock or
10 o’clock
Fig 7B-2. Recommended location for horizontal TXV bulb mount
The TXV sensing bulb SHOULD be mounted on the suction line approximately 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 at the 2 o’clock or
10 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.
III. Field-Installed TXV Retrot
Note: Photos are for basic illustration purposes only. Actual equip-
ment conguration may differ from that shown.
When installing an expansion valve, it is not necessary to slide the
coil out of the housing.
For disassembly and piston removal refer to section 7A-I.
III-1. Inspect the TXV box to conrm that the valve is compatible
with the refrigerant in the system.
Male
(Inlet)
Female
(Outlet)
III-2. Remove the valve from
the box and note the location of the inlet side (threaded
male port) and the outlet side
(female swivel nut port).
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III-4. Slide the attachment nut onto the liquid line stub out.
(See 7A, I-3)
III-5. Braze the stub-out portion to the liquid line and let cool.
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III-7. Tighten all connections taking care to use proper back up.
III-8. Remove the valve identication sticker from the valve and
place it adjacent to the Aspen model number on unit name plate.
III-9a. Some Aspen coils come with a Schrader valve on the suction
line. If a Schrader port is present:
Do not attempt to touch brazed joints
while hot. Severe burns may result.
O-ring
III-6. 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.
8. Connecting Refrigerant Lines
1. Release nitrogen holding charge by depressing the Shrader Valve
at the liquid line connection. If no gas releases from the coil, contact
distributor regarding 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 handler. 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.
B. Screw are nut on TXV equal-
ization tube on to the Schrader
valve stem.
III-9b. In some cases, a suction line Schrader port may not be present. If a Schrader port is NOT present:
A. Install a eld-supplied braze-on Schrader
valve like that shown on the suction line near the
intended sensing bulb mounting location. Follow
valve manufacturer instructions and recommendations for installation.
B. Attach equalizer tube to valve as described in
section III-9a above.
III-10. Mount the sensing bulb as described in section 7B-I or 7B-II.
When handling or manipulating the equal-
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CAUTION
CAUTION
izer tube, take great care not to kink or
make extreme bends in the tubing.
Using a non-bleed expansion valve may require the use of a hard-start kit. Follow the
outdoor unit manufacturer’s guidelines.
6. Flow nitrogen through the piping when brazing.
7. Braze both refrigerant line connections using proper brazing procedures.
8. When all line connections are brazed, perform a proper system
evacuation procedure per the outdoor unit manufacturer instructions.
9. Seal the penetration openings where the lineset piping enters the
cabinet.
9. Leak Check
1. Following outdoor unit manufacturer instructions and recommendations, charge the system with dry nitrogen to a maximum pressure
of 150 PSIG.
2. Check all brazed and screwon line connections by applying a
soap solution to the joint. A leak
will produce bubbles in the soap
solution.
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
specications.
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10. System Charging
An improperly charged system will likely
CAUTION
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in nature and are NOT to supersede outdoor unit manufac-
turer specications.
2A. Flowrator coils: Add refrigerant until the superheat measured at
the outdoor unit suction/vapor line matches the superheat from the
chart below.
cause loss in system performance and
may damage the compressor.
Refer to outdoor unit manufacturer charging guidelines and recommendations. The
recommendations given below are general
Outdoor
Temp
°F D.B. Min Nom Max
65 30 35 40
70 26 30 34
75 21 25 29
80 17 20 23
85 12 15 18
90 8 10 12
95
100
2B. TXV coils: Add refrigerant until the subcooling measured at the
outdoor unit liquid line matches the subcooling recommendation of
the outdoor manufacturer. If chart is unavailable charge the unit to a
subcooling value of 8ºF +/- 1ºF.
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Superheat
11. Mounting Dedicated Horizontal Coil to Furnace
1. Remove shipping brackets on both ends of coil cabinet. Bracket
shown below.
Front Side View
For applications where the coil cabinet is the same height as the furnace use the supplied Z bracket to attach to furnace as shown below.
Top View of Cabinet
For applications where the coil cabinet is taller than the furnace use
an L shaped ller bracket to attach to furnace to coil, as shown below.( Bracket is supplied with CB coils with the 8th option code selection -034)
2. Slide coil up to furnace (note:
bottom ange on coil cabinet will
slide under furnace, anges on
furnace should slide inside coil
cabinet) Coil cabinet should be
ush to back side of furnace.
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Note: Make sure to seal all connection joints. Method of sealing
should be performed according to local codes.
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373 Atascocita Rd.
Humble, TX 77396
Phone: 281.441.6500
Toll Free: 800.423.9007
Fax: 281.441.6510
www.aspenmfg.com
Revised 10/30/2017. Subject to change without notice and without incurring obligation.
© Copyright 2017 Aspen Manufacturing. All Rights Reserved
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