thermastor 4028600 Manual

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Owner’s Manual — Phoenix 270HTx
Installation, Operation & Service Instructions
Read and Save These Instructions
The Phoenix 270HTx LGR,
High Capacity Dehumidifier
Specifications subject to change without notice.
TS-584
01/13
4201 Lien Rd.• Madison, WI 53704
• Automatic Bypass Technology – Patented
technology automatically adjusts for
temperature variation, increasing performance
over a wider operating range.
• High Capacity - Removes 161 pints per day at
AHAM
• 8.9 amps - Removes over 6.5 pints/kWh.
• R-410A Refrigerant
• More Grain Depression - Drier air from an
LGR nishes jobs quicker versus a conventional
refrigerant dehumidier.
• Focused Airflow - Patented focused outlet
directs air downward across the wet surface.
• Motorized Impeller - 380 CFM; Faster drying
and superior static pressure for ducting.
• Multiple Ducting Options - 12” intake, 10”
exhaust.
• Solid State Controls - Easy to read and
operate.
• Recessed 12” Wheels - Allows greater
maneuverability on the job site and efcient
storage. Rolls over obstacles with ease.
• MERV-11 Pleated Media Air Filter
The Phoenix 270HTx is one of the most effective and versatile drying devices available. The Phoenix 270HTx features more
water removal (161 pints per day@AHAM) and higher grain depression than other refrigerant dehumidiers, while drawing only
8.9 amps of electricity.
The 270HTx features Phoenix’s patented bypass design, which is now enhanced to compensate for temperature automatically.
By sensing and adjusting to temperature changes in the drying chamber, the 270HTx maximizes water removal over an
extended operating range without the need for manual adjustments.
At higher temperatures, where typical LGRs lose effectiveness, the Phoenix 270HTx automatically adjusts to continue removing
moisture. This offers several advantages to the restorer, including faster evaporation rates, quicker drying, and elimination of
the need to remove or modify equipment for temperature control.
Phoenix 270HTx
Part No. 4028600
Patent 7,246,503
7,281,389
7,540,166
8,347,640

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1 Specifications
Part No. 4028600
Power 110-120 Vac, 8.9 amps
Water 161 pints/day @ AHAM (80°F, 60%)
Removal
Refrigerant 2 lbs. 1 oz. R410a
Charge
Blower 380 CFM
Internal Condensate Pump with 20’ lift,
30’ vinyl hose
Operating 33°F to 125°F
Range
Filters 16” x 20” x 2” Pleated Media MERV-11
Duct Intake – 12” Flex-Duct
Options Exhaust – 10” Lay-Flat
Warranty Five years;
First year 100% of Parts and Labor
Second-fth year 100% of Parts of sealed
refrigeration system.
Dimensions Width 20”, Height 40”, Depth 23”
Weight 130 lbs.
2 Operation
2.1 Transporting the Phoenix 270HTx
The Phoenix 270HTx must always be upright when
transported by vehicle. It may be tipped on to its handle and
back for loading and moving by hand.
2.2 Location
Note the following precautions when locating the Phoenix
270HTx:
• It is designed to be used INDOORS ONLY.
• If used in a wet area, plug it into a GROUND FAULT
INTERRUPTER.
• DO NOT use the Phoenix 270HTx as a bench or table.
• It must always be used in the upright position.
• The air inlet on top & the side outlet must be at least
1 foot from walls and other obstructions to air ow.
Table of Contents
Introduction................................................................ 1
1. Specifications.......................................................2
2. Operation .............................................................2
2.1 Transporting the Phoenix 270HTx.......................2
2.2 Location..........................................................2
2.3 Electrical Requirements ....................................3
2.4 Condensate Removal .......................................3
2.5 Ducting...........................................................3
2.6 Power Switch................................................... 3
2.7 Pump Purge Switch.......................................... 3
2.8 Hour Meter ..................................................... 3
2.9 Defrost Control Adjustment ............................... 3
2.10 Hours Button.................................................3
2.11 Defrost Light..................................................3
2.12 Low Pressure Control...................................... 3
2.13 Automatic Bypass Control ...............................4
3. Maintenance ........................................................4
3.1 Air Filter .......................................................... 4
3.2 Storage...........................................................4
4. Service................................................................. 4
4.1 Technical Description........................................ 4
4.2 Troubleshooting ............................................... 5
4.3 Air Mover Replacement ....................................6
4.4 Thermistor Replacement...................................6
4.5 Condensate Pump Replacement........................ 6
4.6 Refrigerant Charging ........................................6
4.7 Compressor/Capacitor Replacement...................6
4.8 Gravity Drain Option ......................................... 6
4.9 Relay.............................................................. 6
5. Wiring Diagram.....................................................7
6. Service Parts List.................................................. 8
Warranty ............................................................10
Serial No. ___________________________
Purchase Date ______/______/_____
Dealer’s Name ___________________________________
Read the operation and maintenance instructions
carefully before using this unit. Proper adherence to these
instructions is essential to obtain maximum benefit from
your Phoenix 270HTx dehumidifier.
• It is designed to be used INDOORS ONLY.
• If used in a wet area, plug it into a GROUND FAULT
INTERRUPTER.
• DO NOT use the Phoenix 270HTx as a bench or table.
• It must always be used in the upright position.

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2.3 Electrical Requirements
The Phoenix 270HTx plugs into a common grounded outlet
on a 15 Amp circuit. It draws 8.9 Amps at 80°F, 60% RH.
If used in a wet area, a ground fault interrupter (GFI) is
required.
If an extension cord is required, it must have a minimum of
14 gauge conductors if 25 feet long or less and 12 gauge
conductors if greater than 25 feet long.
2.4 Condensate Removal
The Phoenix 270HTx is equipped with an internal
condensate pump to remove the water that is condensed
during dehumidication. This allows the condensate to be
pumped 30’ with the attached hose. If the condensate must
be pumped more than 20 feet above the unit, a second
pump must be added to relay the condensate. If the pump
fails and the unit must be used before it can be replaced,
the condensate can be drained by gravity (see Sec. 4.9).
2.5 Ducting
A detachable rectangular exhaust collar is supplied that will
allow 10” round lay-at duct to be attached to the Phoenix
270HTx outlet.
To attach ducting to a collar, put the plastic duct end
through the collar center and roll the duct end outward so
that it overlaps the outside of the collar. The duct and collar
may then be quickly attached to the Phoenix 270HTx by
snapping the collar over the four screws at the blower outlet.
2.6 Power Button
Press the POWER button to turn the dehumidier on or off.
When starting the dehumidier the display will show the
accumulated hours. Press the POWER button again to turn
the dehumidier off. The display will also power off.
2.7 Pump Purge Button
During normal operation the pump automatically cycles
every four minutes. Press the PURGE button to remove
condensate manually from the reservoir. There are several
ways to manually remove water from the reservoir:
1. Press the PURGE button once and the pump will run for
20 seconds
2. Press and hold the PURGE button and the pump will run
for up to 30 seconds
3. Press the PURGE button while the dehumidier is
powered off and the pump will run for 30 seconds.
Always manually purge the water reservoir before transport
or storage. Turn off the power and allow the plugged in de-
humidier to rest 15 minutes before the nal purge.
2.8 Hour Meter
The digital hour meter displays the amount of time the
dehumidier has been turned on to the tenth of an hour. The
hour meter continuously cycles between total machine hours
and job hours every 3 seconds. Hours are stored in memory
even when the unit is unplugged. The previous totals will be
displayed next time the unit is powered on.
2.9 HOURS Button
Pressing the HOURS button displays the hour meter when
the unit is turned off but plugged into power. To reset job
hours, press and hold the HOURS button for 5 seconds
when the unit is operating.
2.10 DEFROST Light
The DEFROST light turns on when the unit is in defrost mode
indicating when the compressor is off.
DRYING TIP: Air’s ability to absorb moisture from wet
surroundings and the Phoenix 270HTx’s ability to remove
moisture from that air is greatly improved at higher
temperatures. We recommend that the area to be dried be
heated to over 70°F if possible. Less drying time will be
required and efficiency will improve.
2.11 Low Pressure Protection
If the low side refrigerant drops into a low pressure situation
that may harm the compressor, the solid state controls will
sense the refrigerant conditions and shut off the compressor
until the system automatically resets itself.
The solid state control monitors and compares the ambient
temperature and refrigerant conditions to ensure the system
is protecting compressor at all times. The control protects
the compressor from damage by monitoring cycles, pres-
sures, and system performance.
2.12 Defrost Cycle
If the evaporator coil temperature drops below the defrost
set point, due to excessive frost formation on the coil, the
thermistor activates the solid state control and the defrost
light. The control cycles the compressor “off” and “on”
by monitoring thermistor temperature. The air mover will
continue to run, causing air to ow through the evaporator
coil. The air will melt the ice that formed on the evaporator.
When the coil temperature increases, the thermistor will end
the defrost cycle restarting the compressor.

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If the evaporator temperature does not reach the desired
temperature, the compressor will start after 15 minutes.
The system will start a timed defrost cycle. The timed
defrost cycle ensures the unit will continue to remove water
from the air in cool ambient conditions.
2.13 Automatic Bypass Control
The Phoenix 270HTX senses the ambient conditions during
normal operations. The bypass door automatically moves
into the correct position maximizing performance and
efciency depending on inlet conditions.
3 Maintenance
3.1 Air Filter
The Phoenix 270HTx is equipped with a pleated fabric air
lter that must be checked regularly. The standard lter
is a MERV-11 high efciency lter. Operating the unit with
a dirty lter will reduce the dehumidier’s capacity and
efciency and may cause the compressor to cycle off and on
unnecessarily on the defrost control.
IMPORTANT: DO NOT operate the unit without the lter
or with a less effective lter as the heat exchanger and
coils inside the unit could become clogged and require
disassembly to clean.
3.2 Storage
There are two issues to consider when the Phoenix 270HTx
is stored between uses. Both pertain to the water trapped
in the unit: damage caused by freezing or biological growth.
The effect of the trapped water can be greatly reduced if
precautions are taken to remove as much as possible before
storage.
1. Use the pump purge switch (see Sec. 2.7 & Fig. 4) to
reduce the water level in the reservoir.
2. Stretch the hose at to drain it completely. Raise one
end above your head and spool to drain water out of the
other end.
If the unit will not be exposed to freezing temperatures, an
alternative to reduce biological growth is to ush the unit
with a bio-fungicide that is approved for use with copper,
aluminum and polyethylene. To ush:
1. Run the hose to a drain.
2. Plug in the unit but do not turn it on.
3. Remove the air lter. Slowly pour a quart of the
chemical through the heat exchanger
4. Hold in the pump purge switch to reduce the water level
in the reservoir.
5. Flush with water.
4 Service
CAUTION: Servicing the Phoenix 270HTx with its high
pressure refrigerant system and high voltage circuitry
presents a health hazard which could result in death,
serious bodily injury, and/or property damage. Only
qualified service people should service this unit.
4.1 Technical Description
The Phoenix 270HTx uses a refrigeration system similar
to an air conditioner’s to remove heat and moisture from
incoming air, and to add heat to the air that is discharged
(see Fig. 2).
Hot, high pressure refrigerant gas is routed from the
compressor to the condenser coil (see Figure 2). The
refrigerant is cooled and condensed by giving up its heat
to the air that is about to be discharged from the unit.
The refrigerant liquid then passes through a lter/drier and
capillary tubing which cause the refrigerant pressure and
temperature to drop. It next enters the evaporator coil where
it absorbs heat from the incoming air and evaporates.
The evaporator operates in a ooded condition, which
means that all the evaporator tubes contain liquid refrigerant
during normal operation. A ooded evaporator should
maintain constant pressure and temperature across the
entire coil, from inlet to outlet.
The mixture of gas and liquid refrigerant enter the
accumulator after leaving the evaporator coil. The
accumulator prevents any liquid refrigerant from reaching
the compressor. The compressor evacuates the cool
refrigerant gas from the accumulator and compresses it to a
high pressure and temperature to repeat the process.
Figure 2: Refrigeration system

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4.2 Troubleshooting
No dehumidification, neither hour meter display nor
compressor run and POWER button does not turn ON.
1. Unit unplugged or no power to outlet
2. Defective control board
3. Loose connection in internal wiring
No dehumidification, neither hour meter display nor
compressor run with POWER button ON.
1. Defective control board
2. Loose connection in internal wiring
Some dehumidification, air mover runs continuously but
compressor only runs sporadically.
1. Unit is in defrost cycle, DEFROST light on
2. Defrost thermistor defective
3. Loose connection in compressor circuit
4. Defective compressor overload
5. Defective compressor
6. Defective relay
7. Low refrigerant charge
No dehumidification, air mover runs but compressor does
not.
1. Bad connection in compressor circuit
2. Safety oat switch closed, check pump reservoir
3. Defective compressor capacitor
4. Defective compressor overload
5. Defective compressor
6. Defective control board
7. Low refrigerant charge
Air mover does not run. Compressor runs briefly but
cycles on and off.
1. Loose connection in blower circuit
2. Obstruction prevents impeller rotation
3. Defective air mover
4. Defective control board.
Unit removes some water but not as much as expected.
1. Air temperature and/or humidity have dropped
2. Humidity meter and/or thermometer used are out of
calibration
3. Unit has entered defrost cycle
4. Air lter dirty
5. Defective defrost thermistor
6. Low refrigerant charge
7. Air leak such as loose front cover
8. Defective compressor
9. Restrictive exhaust or inlet ducting
10. Thermistor connection detached from board
Unit runs but does not pump water.
1. Hose kinked or plugged
2. Pump motor defective
3. Pump check valve plugged
4. Bad connection in pump circuit
5. Hose disconnected internally
6. Defective control board
Unit pumps water automatically but not when PURGE
button is pushed.
1. Bad connection in PURGE button circuit
2. Defective control board
Evaporator coil frosted continuously, low dehumidifying
capacity.
1. Defrost thermistor defective
2. Low refrigerant charge
Compressor runs with POWER button OFF.
1. Defective relay
2. Defective control board
3. Upper housing not sealed to tower
Bypass door remains open.
1. Ambient temperature above set point.
2. Defective actuator.
3. Defective board.
4. Loose connection between board and actuator.
Bypass door remains closed.
1. Ambient temperature below set point.
2. Defective actuator.
3. Defective board.
4. Loose connection between board and actuator.
5. Loose temperature sensor connection.
4.3 Air Mover Replacement
The blower has a PSC motor and internal thermal overload
protection. If defective, the complete assembly must be
replaced.
1. Unplug power cord
2. Remove the front cover
3. Remove the 5 screws attaching blower inlet ring

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4. Remove the 4 screws mounting impeller to underside of
base plate
5. Disconnect the blower leads
6. Reassemble the new blower using the above procedure
in reverse
4.4 Thermistor Replacement
The defrost thermistor is placed into the evaporator coil in a
specic location to control the defrost cycle.
To replace thermistor:
1. Unplug the dehumidier.
2. Remove the front and top covers.
3. Remove the control panel.
4. Remove the lter bracket and foam block.
5. Carefully pull back the foam strip above the evaporator.
6. Detach thermistor from control board.
7. Slide thermistor up out of the evaporator coil.
8. Carefully push new thermistor into opening left from old
thermistor.
9. Route thermistor wire along previous path.
10. Reassemble thermistor and dehumidier using the
above procedure in reverse.
4.5 Condensate Pump Replacement
The internal condensate pump removes water that collects
in the reservoir.
To replace the condensate pump:
1. Unplug the unit
2. Remove the rear skidplate
3. Unplug the pump wires from the wire harness
4. Remove the condensate hose and the screw attaching
the pump bracket to the base
5. Replace the pump, hose, wiring, bolts, and cover in the
reverse order
4.6 Refrigerant Charging
If the refrigerant charge is lost due to service or a leak, a
new charge must be accurately weighed in. If any of the
old charge is left in the system, it must be removed before
weighing in the new charge. Refer to the unit nameplate for
the correct charge weight and refrigerant type.
4.7 Compressor/Capacitor Replacement
This compressor is equipped with a two terminal external
overload, run capacitor, but no start capacitor.
4.8 Gravity Drain Option
If the condensate pump fails and cannot be replaced
immediately, the Phoenix 270HTx can be used by draining
by gravity.
1. Unplug the unit and remove the front cover.
2. Push the plastic plug on the right side (see Fig. 4) out
from inside the unit.
3. Locate the heavy vinyl hose that connects the drain pan
to the condensate pump. Pull the end out of the pump.
4. Remove tie wrap holding drain tube to suction line.
5. Push that end of the vinyl hose through the hole in the
right side.
6. Connect a garden hose and run it to a drain. Keep
the hose as at to the oor as possible to avoid air
pockets that would hinder draining. Placing the unit on
something above the oor will also improve draining.
4.9 Relay
The contacts of the single pole, single throw relay complete
the power circuit to the compressor. The contacts are closed
when power is provided to the relay coil via the control
board.

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5 Wiring Diagram
4028595

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Figure 4
Specifications subject to change without notice.
6 Service Parts
Item Description Qty Part No.
1 Top Cover 1 4028583
2 Top Cover Hinge 2 4027267
3 Wheel 12” Gray 2 4026304
4 Cotter Pin 3/32” 1 1284404
5 Air Filter 1.75 x 15.5 x 19.5 1 4021475
6 Hose Plastic 0.62 ID x 28 1 4025708
7 Hose Plastic 0.38 ID 1 4021909
8 Hose Plastic 0.25ID x 33 1 4024916
9 Coupling Body 0.25 Tube 1 4024910
10 Coupling Insert 0.38 Tube 1 4023080
11 Control Board 1 4033671
12 Capacitor Compressor 55mfd 370V 1 4029606
13 Capacitor Impeller 15mfd 371V 1 4033031-07
14 Thermistor 1 4032644
15 Thermistor Bulkhead 1 4028581
16 Cord 1 4032315
17 Compressor 10.2KBTU R410a 1 4029176
18 Overload Compressor 1 4029177
19 Evaporator Coil 1 4028565
Item Description Qty Part No.
20 Condenser Coil 1 4028566
21 Condensate Pump 1 4023649
22 Fan Motorized Impeller 1 4026657
23 Inlet Ring 1 4028564
24 Wire Duct Collar 1 4028593
25 Relay SPST 100/120V 25A 1 1970010
26 Filter Drier (not shown) 1 4029510
27 Actuator 12VDC 1 4028587
28 Adaptor Actuator 1 4028575
29 Wire Harness (not shown) 1 4028580
30 Handle 1 4026094
31 Bolt M10-1.5 X 35 2 1177792
32 Washer M10 X 30 2 4025517
33 Hex Lock Nut M10-1.5 2 1223780
1, 5, 8
7, 9, 10
3, 4
20
19
16
2
25
24
22, 23
17, 18
14
15
6
21
11, 27, 28
30, 31
32, 33
12
13

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Phoenix 270HTx Dehumidifier Limited Warranty
Warrantor:
Therma-Stor LLC
4201 Lien Rd
Madison, WI 53704
1-800-533-7533
Who Is Covered: This warranty extends only to the original end-user of the Phoenix 270HTx dehumidier,
and may not be assigned or transferred.
First Year Warranty: Therma-Stor warrants that, for one (1) year the Phoenix 270HTx dehumidier will
operate free from any defects in materials and workmanship, or Therma-Stor will, at its option, repair or
replace the defective part(s), free of any charge.
Second Through Fifth Year Warranty: Therma-Stor further warrants that for a period of ve (5) years,
the condenser, evaporator, and compressor of the Phoenix 270HTx dehumidier will operate free of any
defects in material or workmanship, or Therma-Stor, at its option, will repair or replace the defective
part(s), provided that all labor and transportation charges for the part(s) shall be borne by the end-user.
End-User Responsibilities: Warranty service must be performed by a Servicer authorized by Therma-Stor.
If the end-user is unable to locate or obtain warranty service from an authorized Servicer, he should call
Therma-Stor at the above number and ask for the Therma-Stor Service Department., which will then
arrange for covered warranty service. Warranty service will be performed during normal working hours.
The end-user must present proof of purchase (lease) upon request, by reasonable and reliable means.
The end-user is responsible for normal care. This warranty does not cover any defect, malfunction,
etc. resulting from misuse, abuse, lack of normal care, corrosion, freezing, tampering, modication,
unauthorized or improper repair or installation, accident, acts of nature or any other cause beyond
Therma-Stor’ reasonable control.
Limitations and Exclusions: If any Phoenix 270HTx Dehumidier part is repaired or replaced, the new
part shall be warranted for only the remainder of the original warranty period applicable thereto (but all
warranty periods will be extended by the period of time, if any, that the Phoenix 270HTx Dehumidier is
out of service while awaiting covered warranty service).
UPON THE EXPIRATION OF THE WRITTEN WARRANTY APPLICABLE TO THE Phoenix 270HTx DEHUMIDIFIER
OR ANY PART THEREOF, ALL OTHER WARRANTIES IMPLIED BY LAW, INCLUDING MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE, SHALL ALSO EXPIRE. ALL WARRANTIES MADE BY Therma-Stor
ARE SET FORTH HEREIN, AND NO CLAIM MAY BE MADE AGAINST Therma-Stor BASED ON ANY ORAL
WARRANTY. IN NO EVENT SHALL Therma-Stor, IN CONNECTION WITH THE SALE, INSTALLATION, USE,
REPAIR OR REPLACEMENT OF ANY Phoenix 270HTx DEHUMIDIFIER OR PART THEREOF BE LIABLE UNDER
ANY LEGAL THEORY FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES INCLUDING WITHOUT
LIMITATION WATER DAMAGE (THE END-USER SHOULD TAKE PRECAUTIONS AGAINST SAME), LOST
PROFITS, DELAY, OR LOSS OF USE OR DAMAGE TO ANY REAL OR PERSONAL PROPERTY.
Some states do not allow limitations on how long an implied warranty lasts, and some do not allow the
exclusion or limitation of incidental or consequential damages, so one or both of these limitation may not
apply to you.
Legal Rights: This warranty gives you specic legal rights, and you may also have other rights which vary
from state to state.