Pentair T20 T-Series User manual

© 2016 Pentair Equipment Protection 89114993
Rev. B P/N 89114993
TSERIES
Air Conditioner
t20 Model
INSTRUCTION MANUAL

© 2016 Pentair Equipment Protection 89114993
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NOTE: Some of the information in this manual may not apply if a special unit was ordered. If
additional drawings for a special unit are necessary, they have been inserted. Contact Pentair
Equipment Protection if further information is required.
IMPORTANT NOTICE
• These instructions were authored in English. Instructions published in languages other than English have been
translated from the authored language.
• These air conditioners are intended to be used by properly trained customers in industrial, communications and
agricultural environments.
• Operating sound level is below 70 dBA.
Disconnect the power source from
the air conditioner before servicing.
WARNING
TABLE OF CONTENTS
IMPORTANT NOTICE....................................................................................................................................................................2
RECEIVING THE AIR CONDITIONER ...........................................................................................................................................3
HANDLING AND TESTING THE AIR CONDITIONER...................................................................................................................3
INSTALLATION INSTRUCTIONS ..................................................................................................................................................4
Design Data................................................................................................................................................................................................ 4
Dimensional Drawing ................................................................................................................................................................................ 4
Mounting Cutout Dimensions.................................................................................................................................................................... 5
Components List........................................................................................................................................................................................ 5
Wire Diagrams ........................................................................................................................................................................................... 6
Without Heat....................................................................................................................................................................................... 6
With Heat............................................................................................................................................................................................ 7
Schematic .................................................................................................................................................................................................. 8
TEMPERATURE CONTROL ..........................................................................................................................................................9
Units With heat........................................................................................................................................................................................... 9
General Information........................................................................................................................................................................... 9
Example.............................................................................................................................................................................................. 9
To change the temperature setting of the thermostat..................................................................................................................... 9
Dial ranges ......................................................................................................................................................................................... 9
Testing thermostat calibration .......................................................................................................................................................... 9
PRINCIPLES OF OPERATION ....................................................................................................................................................10
MAINTENANCE..........................................................................................................................................................................10
Compressor ............................................................................................................................................................................................. 10
Inlet Air Filter........................................................................................................................................................................................... 10
How To Remove, Clean or Install a New Inlet Air Filter......................................................................................................................... 11
Condenser and Evaporator Air Movers................................................................................................................................................... 11
Refrigerant Loss ...................................................................................................................................................................................... 11
TROUBLE SHOOTING.................................................................................................................................................................12
Basic Air Conditioning Trouble Shooting Check List.............................................................................................................................. 12
Symptoms and Possible Causes:............................................................................................................................................................ 13
WARRANTY ................................................................................................................................................................................14
RETURN AND REPAIR POLICY................................................................................................................................................................ 14
LIMITATION OF LIABILITY........................................................................................................................................................................ 15

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RECEIVING THE AIR CONDITIONER
Inspect the air conditioner. Check for concealed damage that may have occurred during shipment. Look for dents,
scratches, loose assemblies, evidence of oil, etc. Damage evident upon receipt should be noted on the freight bill.
Damage should be brought to the attention of the delivering carrier -- NOT to Pentair Equipment Protection --
within 15 days of delivery. Save the carton and packing material and request an inspection. Then file a claim with
the delivering carrier.
Pentair Equipment Protection cannot accept responsibility for freight damages; however, we will assist you in any
way possible.
HANDLING AND TESTING THE AIR CONDITIONER
If the air conditioner has been in a horizontal position, be certain it is placed in an upright, vertical or mounting
position for a minimum of five (5) minutes before operating.
Do not attempt to operate the air conditioner while it is horizontal
or on its side, back or front. The refrigeration compressor is filled
with lubricating oil. This will cause permanent damage to the air
conditioner and also voids the warranty.
CAUTION
TEST FOR FUNCTIONALITY BEFORE MOUNTING THE AIR CONDITIONER TO THE ENCLOSURE.
Refer to the nameplate for proper electrical current requirements, and then connect the power cord to a properly
grounded power supply. Minimum circuit ampacity should be at least 125% of the amperage shown in the design
data section for the appropriate model. No other equipment should be connected to this circuit to prevent
overloading.
Operate the air conditioner for five (5) to ten (10) minutes. No excessive noise or vibration should be evident
during this run period. The condenser blower (ambient air), the evaporator blower (enclosure air), and the
compressor should be running.
Condenser air temperatures should be warmer than normal room temperatures within a few minutes.
The compressor is provided with automatic reset thermal overload protection. This thermo-switch is located
and mounted inside the plastic enclosure clipped to the compressor. The switch operates when the compressor
overheats due to clogged or dirty inlet air filter or if ambient air temperatures exceed nameplate rating or if
enclosure dissipated heat loads exceed the rated capacity of the air conditioner. The thermal overload switch will
actuate and stop compressor operation. The blowers will continue to operate and the compressor will restart
after it has cooled to within the thermal overload cut-in temperature setting.

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INSTALLATION INSTRUCTIONS
1. Inspect the air conditioner and verify correct functionality before mounting the air conditioner. See
HANDLING AND TESTING THE AIR CONDITIONER on page 3.
2. Determine if the unit is to be surface or recess mounted. Using the appropriate cutout dimensions,
see Mounting Cutout Dimensions on page 5 of this manual, prepare the enclosure opening for
either surface or recess mounting.
3. Using the gasket kit provided, install gaskets to air conditioner.
4. Mount air conditioner on enclosure using 1/4-20x.625 mounting bolts provided. “EZ” mount tabs
can be used to hold unit on enclosure while mounting in place. Torque each bolt to 65 in./lbs. Allow
unit to remain upright for a minimum of five (5) minutes before starting. Caution! Air conditioner
must be in upright position during operation.
5. When routing the drain tube, caution should be taken to keep it from kinking or being elevated
above the exit point of the air conditioner. The drain tube must be on a continuous downward
slope. A slight elevation of the tube could result in secondary trap. FAILURE TO FOLLOW THESE
INSTRUCTIONS COULD RESULT IN OVERFLOWING OF THE CONDENSATE DRAIN PAN.
6. Refer to top of nameplate for electrical requirements. Connect the power cord to a properly
grounded power supply. Use of an extension cord is not recommended. Electrical circuit should be
fused with slow blow or HACR circuit breaker.
DESIGN DATA
Model Voltage Hz Full Load
Amps Phase BTU/Hr. @
Max Ambient
Temperature
Max Ambient
Temperature
(°F/°C)
Shipping
Weight
(lb./kg)
T200216GXXX 115 50/60 7.0 11800/2000 131/55 45/20.4
T200226GXXX 230 50/60 3.5 11800/2000 131/55 45/20.4
-XXX will be replaced with a three-digit number designating all desired options. Consult the factory for specific model numbers.
DIMENSIONAL DRAWING
89115040
10.00
MOUNTING HARDWARE FOR FULLY RECESSED
MOUNTING IS BEHIND REMOVEABLE FRONT COVER.
CLEANABLE, REUSEABLE ALUMINUM INLET FILTER
SLIDES OUT SLOT IN BOTTOM OF FRONT COVER.
20.00
9.90 .72
(2)
6.79
(2)
REMOVEABLE
HANGING
TABS(2)
ENC
AIR IN
7.53
1/2" DRAIN STUB
1.80
(2)
8.00
(2)
8.88
(2)
8.10
9.38
(3)
3.76
11.86
1.19
5.56
1/4-20 MTG HOLES(12)
(6 ON BACK FACE -
6 BEHIND FRONT COVER)
POWER
CORD
ENTERANCE
T-STAT
ADJUST
AMB
AIR
OUT
ENC
AIR
OUT
AMB
AIR IN

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MOUNTING CUTOUT DIMENSIONS
87983213
External Mounting Internal Mounting
CUTOUT INSTRUCTION
(As viewed from outside of enclosure)
NOTE: Dashed lines represent air conditioner.
COMPONENTS LIST
Part Description Part Number
115V 230V
Impeller, Condenser 10-1091-121 10-1091-122
Fan, Evaporator 12-1012-01 12-1012-02
Capacitor, Compressor 89107709 89106525
Capacitor, Condenser Impeller S-1353-1 52-6084-02
Coil, Condenser 20-1020-02 20-1020-02
Coil, Condenser, Coated 20-1020-01 20-1020-01
Coil, Evaporator 20-1021-00 20-1021-00
Compressor 89109872 89109873
Filter, Air, Reusable 89057620 89057620
Filter/Dryer 52-6028-03 52-6028-03
Service Cord 52-6035-140 52-6035-141
Thermal Overload, Compressor 89109877 89109878
Thermostat, SPST, 55-100F 10-1061-16 10-1061-16
Optional Heater 10-2004-25 10-2004-26
Optional Malfunction Switch 52-6104-42 52-6104-42

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WIRE DIAGRAMS
WITHOUT HEAT
89114860

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WITH HEAT
89109602

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SCHEMATIC

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TEMPERATURE CONTROL
The electromechanical thermostat is factory preset to 75 F/23 C. To change the temperature setting, remove
the nylon plug from the front face of the unit. Use a standard screwdriver to adjust thermostat. For cooler
temperatures turn clockwise, for warmer temperatures turn counterclockwise. Setpoint differential is 6 F.
UNITS WITH HEAT
GENERAL INFORMATION
Air conditioners with electric heat are equipped with two thermostats that are clearly marked on the label
as to which thermostat is cooling and which is heating.
The electromechanical thermostats are factory set for; cooling at 80 F / 27 C, heating at 55 F / 13 C unless
otherwise noted on the Shop Record. The thermostats have a differential of 10 F between the on / off
function of the air conditioner. The thermostat set point designates the temperature point at which the air
conditioner turns off. The thermostats have a variance of ±3 F at set points below 100 F and a variance of
±4 F at 100 F.
EXAMPLE
With a dial setting for cooling at 80 F, the cooling operation of the air conditioner will turn on at 90 ±3 F
and turn off at 80 ±3 F.
With a dial setting for heating at 55 F, the heating operation of the air conditioner will turn on at 55 ±3 F
and turn off at 65 ±3 F.
TO CHANGE THE TEMPERATURE SETTING OF THE THERMOSTAT
Remove the nylon plug which covers the temperature adjustment screw. Using a standard screw driver,
turn the adjustment screw clockwise for cooler settings and counter clockwise for warmer settings.
Reinstall the nylon plugs.
DIAL RANGES
The cooling thermostat dial range is from 70 F to 100 F. The heating thermostat dial range is from 55 F to
65 F.
The air conditioners are equipped with thermostat stop screws to limit the ranges. Removing the cooling
stop screws for any purposes other than testing the operation of the air conditioner may cause limited
cooling due to the evaporator coil icing over.
Removing the heating stop screws for any purposes other than testing the operation of the air conditioner
will cause the air conditioner to have a limited differential between the heating and cooling function. This
will cause the air conditioner to cycle between heating and cooling more frequently.
TESTING THERMOSTAT CALIBRATION
Cooling Thermostat
With the air conditioner plugged in and the cooling thermostat set to the lowest position, (remove
stop screw), measure the temperature of the intake air on the evaporator side of the unit and note
the temperature. Turn the cooling thermostat dial counter clockwise at a rate of 1 F per second
until the compressor stops and note the reading on the dial. Compare the two readings, they must
be within ±3 F of each other.
Heating thermostat
With the air conditioner plugged in and the heating thermostat set to the lowest position, (remove
stop screw), measure the temperature of the intake air on the evaporator side of the unit and note
the temperature. Turn the heating thermostat dial counter clockwise at a rate of 1 F per second
until the heater starts (read change in amps of unit to determine when heating starts) and note the
reading on the dial. Compare the two readings, they must be within ±3 F of each other.

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PRINCIPLES OF OPERATION
If electrical power to the air conditioner is interrupted and reapplied immediately, (within 3 to 5 seconds), the
compressor may not restart due to the high back pressure of the compressor. It takes a minimum of one (1)
minute after shut-down for the compressor suction and discharge pressures to equalize in order for the air
conditioner to restart.
Operating the air conditioner below the minimum ambient temperature or above the maximum ambient
temperatures indicated on the nameplate voids all warranties.
It is recommended that the warranty section of this manual be read in order to familiarize yourself with
parameters of restricted operation.
The moisture that the enclosure air can contain is limited. If moisture flows from the drain tube continuously this
can only mean that ambient air is entering the enclosure. Be aware that frequent opening of the enclosure’s door
admits humid air, which the air conditioner must then dehumidify.
Units with the optional malfunction switch have a normally open connection between the red & yellow wires and
normally closed with the red and blue wires. During alarm the red and yellow wires will be closed and the blue
and red wires will be open.
Maximum electrical ratings for the switch are 13A for 120 VAC and 10A for 240 VAC.
MAINTENANCE
COMPRESSOR
The compressor requires no maintenance. It is hermetically sealed, properly lubricated at the factory and should
provide years of satisfactory operating service.
Should the refrigerant charge be lost, recharging ports (access fittings) on the suction and discharge sides of the
compressor are provided for recharging and/or checking suction and discharge pressures.
Under no circumstances should the access fitting covers be loosened, removed or tampered with.
Breaking of seals on compressor access fittings during warranty period will void warranty on hermetic system.
Recharging ports are provided for the ease and convenience of reputable refrigeration repair service personnel
for recharging the air conditioner.
INLET AIR FILTER
Proper maintenance of the inlet air filter, located behind the front cover, will assure normal operation of the air
conditioner. If filter maintenance is delayed or ignored, the maximum ambient temperatures under which the unit
is designed to operate will be decreased.
If the compressor’s operating temperature increases above designed conditions due to a dirty or clogged filter
(or plugged condenser coil), the air conditioner’s compressor will stop operating due to actuation of the thermal
overload cutout switch located on the compressor housing. As soon as the compressor temperature has dropped
to within the switch’s cut-in setting, the compressor will restart automatically. However the above condition will
continue to take place until the filter has been cleaned or replaced.
It is recommended that power to the air conditioner be interrupted intentionally when abnormally high
compressor operating temperature causes automatic shutdown of the unit. The above described shutdown
is symptomatic of clogged or dirty filter, thus causing a reduction in cooling airflow across the surface of the
compressor and condenser coil.
Do not run the air conditioner for extended periods of time with the filter removed. Particles of dust, lint, etc., can
plug the fins of the condenser coil which will give the same reaction as a plugged filter. The condenser coil is not
visible through the filter opening, so protect it with a filter.
Continued operation under the above conditions can and will damage and shorten compressor life. The air
conditioner is available with an easily removable inlet filter to facilitate necessary cleaning. There should be no
reason to neglect this necessary maintenance.