Pentair 33WC Instruction Manual

Water-Cooled Indoor aIr CondItIoner

33WC Model

INSTRUCTION MANUAL

Rev. L

© 2013 Pentair Equipment Protection 87976540

P/N 10-1008-63

TABLE OF CONTENTS

HANDLING & TESTING THE AIR CONDITIONER ........................................................................................................................3

INSTALLATION INSTRUCTIONS ..................................................................................................................................................4

TECHNICAL INFORMATION ......................................................................................................................................................... 4

Design Data ................................................................................................................................................................................................ 4

DIMENSIONAL DRAWING.......................................................................................................................................................................... 4

PRINCIPLES OF OPERATION ......................................................................................................................................................5

Mounting Gasket ........................................................................................................................................................................................ 5

TEMPERATURE CONTROL ..........................................................................................................................................................6

WATER USAGE .............................................................................................................................................................................6

Condenser .................................................................................................................................................................................................. 6

Manual Reset High Pressure Limit Switch ............................................................................................................................................... 6

Water Valve ................................................................................................................................................................................................. 6

Water .......................................................................................................................................................................................................... 6

MAINTENANCE ............................................................................................................................................................................7

Compressor ............................................................................................................................................................................................... 7

Evaporator Blower ..................................................................................................................................................................................... 7

Refrigerant Loss ........................................................................................................................................................................................ 7

Freezing and Draining the System ............................................................................................................................................................ 7

Components List ........................................................................................................................................................................................ 8

WARRANTY ................................................................................................................................................................................10

HOLD HARMLESS ......................................................................................................................................................................11

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.

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© 2013 Pentair Equipment Protection

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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, 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 & TESTING THE AIR CONDITIONER

TEST FOR FUNCTIONALITY BEFORE MOUNTING THE AIR CONDITIONER TO THE ENCLOSURE.
If it is necessary to place the air conditioner in a horizontal position after unpacking, be certain it is placed in an

upright, vertical or mounting position for a minimum of five (5) minutes before operating.

CAUTION

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.

Refer to the nameplate for proper electrical current requirements, then connect 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.

Connect to clean, pressurized water supply and provide drain.
Operate the air conditioner for five (5) to ten (10) minutes. No excessive noise or vibration should be evident

during this run period. The evaporator blower (enclosure air), and the compressor should be running.
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 only time this switch should operate is when
the compressor overheats due to ambient air temperatures exceeding 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 blower will continue to operate and water will continue to flow for a short period. The
compressor will restart after it has cooled to within the thermal overload cut-in temperature setting.

The unit will also shut down if water supply is interrupted. See WATER USAGE on page 6.

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INSTALLATION INSTRUCTIONS

1. Inspect air conditioner. Verify functionality before mounting the air conditioner, see HANDLING &
TESTING THE AIR CONDITIONER on page 3.

2. Using the cutout dimensions shown in this manual or the cutout template printed on the units
shipping carton, prepare the air “IN” and air “OUT” openings, and mounting bolt hole pattern for
the enclosure.

3. Using the gasket kit provided, install gaskets to air conditioner. See Mounting Gasket on page 5
for proper location.

4. Mount air conditioner on enclosure using mounting bolts and screws provided. “EZ” mount tabs
can be used to hold unit on enclosure while mounting in place. Connect water inlet and outlet
fittings to a clean pressurized water supply. 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. 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.

TECHNICAL INFORMATION

DESIGN DATA

Model Voltage Hertz

330216GWXXX 115 50/60 5.0/4.3 1 2500/2500 90 0.5 85
330226GWXXX 230 50/60 3.1/2.8 1 2500/2500 90 0.5 85

330416GWXXX 115 50/60 6.0/5.8 1 3800/4000 90 0.5 85
330426GWXXX 230 50/60 3.3/3.2 1 3800/4000 90 0.5 85

XXX will be replaced with a three-digit number designating all desired options. Consult the factory for specific model numbers

Full Load

Amps

Phase BTU/Hr.

Maximum
°F Water
Temperature

Maximum
Water
Usage
(GPM)

Shipping
(lbs/kg)

DIMENSIONAL DRAWING

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© 2013 Pentair Equipment Protection

89045090

87976540

MOUNTING GASKET MOUNTING CUTOUT DIMENSIONS

89045090

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.

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TEMPERATURE CONTROL

The electromechanical thermostat is factory preset to 75 F/23 C. To change the temperature setting, remove the
front cover. Use a standard screwdriver to adjust thermostat. For cooler temperatures turn clockwise, for warmer
temperatures turn counterclockwise.

WATER USAGE

CONDENSER

The water cooled air conditioner uses water as the cooling medium for the condensing side of the hermetic
refrigeration system. This water is passed through a heat exchanger that uses the cool water to lower the
temperature of the hot gaseous refrigerant, causing it to condense. The water is warmed by this exchange of
heat, and is passed out of the air conditioner at an elevated temperature. The inlet and outlet water fittings are
located on the bottom of the air conditioner. A sealant is recommended when connecting the inlet and outlet
water lines to prevent leakage. It is extremely important for the air conditioner to have an uninterrupted supply of
clean cooling water. Interference with the water supply will cause the unit to automatically shut down and require
manual reset.

MANUAL RESET HIGH PRESSURE LIMIT SWITCH

The manual reset high pressure limit switch is located behind the front cover. This limit switch interrupts
compressor operation when condenser refrigerant exceeds 310 PSIG, which most frequently occurs as a result
of the condenser water supply being reduced or shut down. After identifying and correcting the problem with the
water supply to the unit, compressor operation can be restored by pushing the manual reset button located on the
switch.

WATER VALVE

The valve that controls the flow of condensing water is also located behind the front cover. This valve modulates
the flow of water to the condensing coil. Water flow varies according to a variety of loading conditions, including
electrical load, inlet water temperature, ambient air temperature, cabinet construction, etc. The maximum
flow rate in the Design Data on page 4 is given for the conditions of maximum rated load, maximum water
temperature, and maximum ambient temperature, and reflects the highest flow rate anticipated for the unit.
NOTE: This valve has been preset at the factory for the correct operation of the unit. The setting of the valve
should not be altered.

WATER

The air conditioner water supply does not require special treatment, but care should be taken to avoid any gross
contamination. Corrosives may cause leakage within the coil and water lines. Mineral rich water will cause
scaling of the coil, degrading performance. Particulates may cause rapid erosion of the coil, and could result in
clogging of the control valve. NOTE: A filter to clean the air conditioner water supply is recommended.

If the temperature of the inlet water is higher than that shown in the Design Data on page 4, it will result in a
higher flow rate, and may cause shut-down of the unit. High inlet water temperatures should be avoided.

When the air conditioner is shut-down, either because of a thermostatic cut-out or a loss of power, the water
flow should gradually diminish to zero. If water flow persists, it may indicate a malfunction of the control valve.
Information on the specific valve employed is supplied with the air conditioner.

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© 2013 Pentair Equipment Protection

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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.

EVAPORATOR BLOWER

Blower motors require no maintenance. All bearings, shafts, etc. are lubricated during manufacturing for the life
of the motor.

REFRIGERANT LOSS

Each air conditioner is thoroughly tested prior to leaving the factory to insure against refrigeration leaks. Shipping
damage or microscopic leaks not found with sensitive electronic refrigerant leak detection equipment during
manufacture may require repair or recharging of the system. This work should only be performed by qualified

professionals, generally available through a local, reputable air conditioning repair or service company.

Refer to the data on the nameplate which specifies the type of refrigerant and the charge size in ounces.
Before recharging, make sure there are no leaks and that the system has been properly evacuated into a deep

vacuum.

FREEZING AND DRAINING THE SYSTEM

WARNING

The air conditioner can be severely damaged by freezing if not
properly drained. damage due to freezing is not covered by the
warranty.

If the unit is to be shipped to, or stored in an area that experiences climatic extremes, care must be taken to fully
drain the unit to avoid freezing. The location of the drain is shown in the DIMENSIONAL DRAWING on page 4.
To completely drain the unit, it is recommended that 100 psi maximum compressed air be applied to the water
inlet, while lifting the spring of the valve with a screwdriver to allow free passage of water. An alternate means
would be to start the air conditioner and allow the refrigeration system pressure to open the valve while air
pressure is applied to inlet.

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COMPONENTS LIST

Part Description 330216GWXXX 330226GWXXX 330416GWXXX 330426GWXXX

Evaporator Coil 33-2002-01 33-2002-01 33-2002-00 33-2002-00
Condenser Water Coil 47-6121-03 47-6121-03 47-6121-03 47-6121-03
Filter/Drier 52-6028-00 52-6028-00 52-6028-00 52-6028-00
Mounting Gasket Kit 33-1000-00 33-1000-00 33-1000-00 33-1000-00
Evaporator Fan 12-1012-101 12-1012-102 12-1012-101 12-1012-102
Compressor 10-1016-23 10-1026-74 10-1016-22 10-1026-74
Thermal Overload 10-1007-19 10-1007-57 10-1007-44 10-1007-57
Compressor Relay 10-1028-20 10-1028-07 10-1028-05 10-1028-07
Start Capacitor None 10-1032-09 None 10-1032-09

For additional technical support, contact Pentair Equipment Protection at 800-896-2665.

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© 2013 Pentair Equipment Protection

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NOTES

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© 2013 Pentair Equipment Protection

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WARRANTY

Please note: Warranty effective at time of shipment. Pentair Equipment Protection warrants that all
material and workmanship are free of defects in quality which impair the usefulness of the air conditioner
for a period of five (5) years for nonoperating parts, except for the filter; and for one (1) year for everything

else when installed and operated under the following conditions:
A. Maximum voltage variation no greater than plus or minus 10% of nameplate nominal rating.
B. Maximum frequency variation no greater than plus or minus 3 Hz. of nameplate nominal rating.
C. Must not exceed minimum and maximum stated temperatures on the nameplate.
D. Not to exceed (BTU/Hr.) rating, including any heat sink, as indicated on the nameplate.
E. The unit must not be restarted for a period of one (1) minute after intentional or accidental shut-off.

(This does not apply to heat exchanger or filter fan.)

Pentair Equipment Protection warrants that all material and workmanship are free of defects in quality

which impair the usefulness of the filter fan package and all custom air conditioners for a period of one (1)

year, except for the filter, when installed and operated under conditions A, B, C and D as listed above.

Not covered in this warranty is damage to the air conditioner due to the introduction of other than the

nameplate-designated refrigerant. Operation of any Pentair Equipment Protection product that has

not been designed with proper protective coatings and/or options and is in an abnormal or corrosive

environment voids the warranty. Prolonged operation with dirty filters also voids the warranty.

Should any part prove defective within the above warranty period, the customer may choose to return

the defective product that is under warranty to Pentair Equipment Protection for repair at no charge or

the customer has the option to repair the defective products at his own expense and Pentair Equipment

Protection will supply repair parts at no charge providing the defective part is returned and found to have

failed under warranty. Parts supplied as warranty replacement parts will assume the balance of the

warranty on the part returned for warranty consideration.

Please be advised: According to the Federal Register, no person maintaining, servicing, repairing, or

disposing of appliances may knowingly vent or otherwise release into the environment any class I or class

II substance used as refrigerant.

Pentair Equipment Protection assumes no liability beyond the repair or replacement of its own product.

Customer modification of any Pentair Equipment Protection product voids this warranty.

The purchaser assumes the responsibility of grounding the unit and installing it in accordance with local

electrical and safety codes, as well as the National Electric Code (NEC) and OSHA.

THIS EXPRESS WARRANTY CONSTITUTES THE ENTIRE WARRANTY WITH RESPECT TO THE

PRODUCT AND IS IN LIEU OF ALL OTHERS, EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY OR

MERCHANTABILITY AND WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE AND IN NO EVENT

IS PENTAIR EQUIPMENT PROTECTION RESPONSIBLE FOR ANY CONSEQUENTIAL DAMAGES OF ANY

NATURE WHATSOEVER.

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© 2013 Pentair Equipment Protection

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HOLD HARMLESS

In consideration of purchase of equipment from Pentair Equipment Protection by a customer, Pentair

Equipment Protection agrees to indemnify and hold harmless such customer and users with a defense,

as to any claim, demand, statutory court cost, fees for attorney’s services provided for below, and/

or judgment, for actual of alleged patent infringement in any country, arising out of the use, sale or

advertisement of any equipment manufactured or sold by Pentair Equipment Protection to Pentair

Equipment Protection’s own specifications, provided that the customer or user shall promptly notify

Pentair Equipment Protection in writing of any such claim or demand, provided further that Pentair

Equipment Protection shall have the right and option to undertake and control the entire defense of such

claim, or demand instituted against the customer or user, but limited to the products made or sold by

Pentair Equipment Protection, through counsel selected by Pentair Equipment Protection, and to settle

and pay any claim award arising out of such claim or demand, and provided further that the customer or

user will provide such information and assistance as Pentair Equipment Protection may request subject to

reimbursement by Pentair Equipment Protection for any out-of pocket expense incurred in providing such

requested assistance. Liability of Pentair Equipment Protection for any infringement or claim thereof shall

be limited to the above undertaking.

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© 2013 Pentair Equipment Protection

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Pentair Equipment Protection
2100 Homan

Way

M

PentairEquipmentProtection.com

inneapolis, MN 55303 USA

+1.763.422.2211

+1.763.576.3200

Rev. L

© 2013 Pentair Equipment Protection 87976540

P/N 10-1008-63