QA OCEANAIRE PWC60 Manual

ENGINEERING, INSTALLATION AND SERVICE MANUAL
PWC60 PWC12
PWC series
Portable Water-Cooled Spot Cooler
Form EISM-PWC 02272017

FORWARD
This manual provides the user with basic details for the installation and operation of the
OceanAire PWC spot cooler. It is recommended to read and fully understand the instruc-
tions outlined within this manual, before operating the PWC unit.
As with all commercial air conditioning equipment, it is recommended to have the PWC
sized and installed by a licensed specifying engineer and contractor, in accordance with
all local and state codes. The length of service received can be extended by following
the installation and preventive maintenance instructions.
NOTICE
In our ongoing process of continuous improvement, the items and procedures described
in this manual are subject to change without notice. Please note model and serial num-
ber of the PWC unit when contacting the factory.
TABLE OF CONTENTS
PAGE
GENERAL INFORMATION…................................. 1
PRODUCT DATA AND SPECIFICATIONS............ 2
UNIT DESCRIPTION
Standard Features.................................. 3
Applications / Operation.......................... 4
Electrical Configurations......................... 5
Use of Extension Cords.......................... 6
Accessories……….................................. 7 - 12
Options / Special Order........................... 13
Installation............................................... 14
Thermostat…………................................ 15
SERVICE
Water Valve Adjustment……………….... 16
Unit Interior………………………………… 17
Replacement Parts Procedure................ 18
Troubleshooting Guide............................ 19
Preventive Maintenance.......................... 20
DIAGRAMS
Piping Schematic..................................... 21
Single Phase Wiring Diagrams………….. 22-23
Three Phase Monitor............................... 24
Three Phase Wiring Diagrams................ 25 - 27
WARRANTY………………………………………….. 28
END USER INFORMATION ……………………….. 29
TECH NOTES……………………………………….... Back Page

GENERAL INFORMATION
The OceanAire PWC is a portable water-cooled air conditioner designed for permanent or
temporary spot cooling applications. The entire air conditioning unit has been built in an
attractive sheet metal cabinet, equipped with heavy-duty casters for mobility. All PWC
models come with a 10-foot power cord for electrical connection and added mobility in
service. These spot-coolers are designed to direct air to specific areas or objects through
a discharge grille located on the upper-front of the unit. The PWC models range in cooling
capacities from 12,000 BTU/HR to 60,000 BTU/HR to satisfy most space cooling
requirements.
The PWC is a self-contained unit with the entire cooling system (blower assembly, electri-
cal, refrigerant, and waterside components), neatly arranged in a gray polyester powder
coated metal cabinet. When connected to the proper source of electrical power, a 24-volt
thermostat controls the PWC unit to provide the desired level of comfort and cooling.
A wide variety of accessories and factory installed options are available for the PWC units
allowing for improved performance and versatility.
1
NOMENCLATURE
P WC 36 1 2
PORTABLE VOLTAGE
WATER-COOLED PHASE (1 or 3)
NOMINAL CAPACITY
CAPACITY RATING
12..........12,000 BTU/HR
18..........18,000 BTU/HR
24..........24,000 BTU/HR
36..........36,000 BTU/HR
60……...60,000 BTU/HR
WARRANTY CARD
It is important that the warranty card be filled out completely and returned to the factory
within fourteen (14) days of installation of the unit in order to receive the benefits of the
warranty.

2
PWC
SPECIFICATIONS
NOTES
1. Dedicated Circuit and Time Delay fuse or circuit breaker are recommended
Cooling Capacity is total BTUH at 80ºDB/67º WB return air,
.
4. Cooling EER is determined at high fan speed
5. Sound Pressure, dB at 5 feet, commercial operation
6. Amps & Watts at 208 Volts (208-230 V Models)
2. with 85° EWT and 105° LWT
3 CFM with free discharge
* May COOL down to 55º if equipped with hot gas bypass (factory installed)
COOLING AMBIENT* OPERATING RANGE 65º TO 105º
WARRANTY
ALL OCEANAIRE PRODUCTS ARE COVERED BY THE
OCEANAIRE LIMITED WARRANTY
PLUS, 4 ADDITIONALYEARS FOR THE COMPRESSOR
(RESTRICTIONS APPLY)
1 YEAR ON THE FULL PRODUCT

STANDARD FEATURES
CABINET
The PWC-Series cabinet is constructed of 18 gauge steel with a gray polyester powder
coated finish that will compliment any decor. The entire cabinet is insulated with
sound- absorbing insulation for cool, quiet comfort. All units come equipped with handles
and swivel casters for portability and convenient set-up.
ELECTRONIC THERMOSTAT
All PWC units are equipped with a non-programmable electronic thermostat. When
power is connected to the unit, the thermostat will control the unit to cool a space to the
desired temperature. The thermostat is also capable of controlling the fan to operate
automatically (when needed) or continuously. To protect the compressor from
short-cycling, there is a built-in time delay in the thermostat. In the event of a power
outage, all thermostat settings are saved, and the unit will re-start automatically.
FAN SPEED CONTROL
A two position rocker switch, located next to the thermostat, provides the user with the
option of running the evaporator fan at high-speed or low-speed.
CONDENSATE PUMP
All PWC units come equipped with an Automatic Condensate Pump that removes the
condensate. The pump discharges through a 3/8 male flare connection located on the
back of the unit. The pump is capable of pumping to a 20-foot height, to handle almost
any installation requirement.
CONDENSATE ALARM LIGHT
On the front of all PWC models, there is a Condensate Alarm Light (RED) located near
the thermostat. The light indicates a condensate pump over-flow condition where the
pump is either disabled, or incapable of removing the condensate water, and must be
serviced.
FILTERS
All PWC units are equipped with a washable filter at the air intake. An electrostatic mesh
air filter is located behind the evaporator return air grille to filter the air before it is cooled,
keeping the coil free from dust build-up. The filter can be easily removed and cleaned.
HIGH PRESSURE SAFETY SWITCH
Located on the back of the PWC unit is a manual re-set high pressure switch, used for the
protection of the compressor in the event that the condenser water supply is turned off. If
the condensing pressure exceeds the limit setting, the switch cycles off the compressor,
while the evaporator fan remains running, The high pressure switch is also wired in se-
ries with the condensate pump. If a failure occurs with the operation of the pump
circuit, the HP switch will open. Once the water interruption/condensate pump failure has
been corrected, turn the unit off, reset the switch by depressing the red
RESET button on the back of the unit, and restart the unit.
POWER CORDS
All PWC units come with power cords, convenient connection and portability. All models,
except for the 3-phase and 5-ton units, are equipped with LCDI for added safety devices.
3

4
RETURN
AIR
INLET
EVAPORATOR
FAN DISCHARGE
“COOL”
GRILLE
AND WASHABLE
FILTER
THERMOSTAT
DRAIN
WATER IN
WATER OUT
FAN SPEED
SWITCH
APPLICATIONS
SPOT COOLER
The PWC can be used in an open environment to cool specific objects or "spots". Spot
Cooling is a convenient and economical way to provide air conditioning where cooling the
entire space is impractical. Cool air is discharged from the unit and is directed where it is
needed. Nozzle kits can be used to improve direction of the cooling airflow.
ROOM AIR CONDITIONER
One feature of the PWC is it operates as a room air conditioner because water is used as
the means for heat rejection. The major advantage of water-cooled air conditioning is the
convenience of connecting water hoses, or lines, as compared to the installation of
condenser air ducts used for air-cooled portables. A variety of hose kit lengths are
available that can be used for connecting to a water supply and drain, while providing
portability within the conditioned space.
PWC—OPERATION / DESCRIPTION

ELECTRICAL CONFIGURATION
All PWC Series units are equipped with a standard 10-foot long service cord with plug
configurations and receptacle requirements as shown in this chart. PWC1211, PWC1811,
PWC2412 and PWC3612 units come with LCDI (Leakage Current Detection & Interruption)
devices that serve as a means of electrical protection.
CAUTION
DO NOT USE THE LCDI AS AN ON/OFF SWITCH FOR THE UNIT
All 3-phase models are equipped with locking plugs for added connection reliability. Refer
to the chart below for plug and receptacle details for all PWC models.
A DAMAGED LCDI POWER SUPPLY CORD MUST BE REPLACED
WITH A NEW POWER SUPPLY CORD OBTAINED FROM OCEAN-
AIRE, AND NOT REPAIRED
5
UNIT/MODEL PLUG CONFIGURATION RECEPTACLE
115 VOLT
PWC1211
PWC1811
NEMA 5-15R
208-230 VOLT SINGLE PHASE
PWC2412
PWC3612
NEMA 6-20R
208-230 VOLT SINGLE PHASE
PWC6012
NEMA 6-30R
208-230 VOLT 3-PHASE
PWC3632
NEMA L15-20R
208-230 VOLT 3-PHASE
PWC6032
NEMA L15-30R
460 VOLT 3-PHASE
PWC3634
PWC6034
NEMA L16-20R
15A-125 VOLT
NEMA 5-15P
20A-250 VOLT
NEMA 6-20P
30A-250 VOLT
NEMA 6-30P
20A-250 VOLT
NEMA L15-20P
30A-250 VOLT
NEMA L15-30P
20A-460 VOLT
NEMA L16-20P

6
USE OF EXTENSION CORDS
CAUTION
FOR MODELS PWC1211 AND PWC1811 AN EXTENSION CORD CAN BE
USED PROVIDED IT IS RATED AT LEAST 15 AMPS @ 115 VOLTS WITH
GROUNDING-TYPE ATTACHMENT PLUG AND GROUNDING TYPE
CONNECTOR (LOAD FITTING)
FOR MODELS PWC2412 AND PWC3612 AN
EXTENSION CORD CAN BE USED PROVIDED IT IS RATED AT LEAST 20 AMPS
@ 250 VOLTS WITH GROUNDING-TYPE ATTACHMENT PLUG AND GROUNDING
TYPE CONNECTOR (LOAD FITTING)
FOR MODEL PWC6012 AN EXTENSION CORD CAN BE USED PROVIDED IT
IS RATED AT LEAST 30 AMPS @ 250 VOLTS WITH GROUNDING-TYPE ATTACH-
MENT PLUG AND GROUNDING TYPE CONNECTOR (LOAD FITTING)
FOR MODEL PWC3632 AN EXTENSION CORD CAN BE USED PROVIDED IT
IS RATED AT LEAST 20 AMPS @ 250 VOLTS, 3 PHASE
FOR MODEL PWC6032 AN EXTENSION CORD CAN BE USED PROVIDED IT
IS RATED AT LEAST 30 AMPS @ 250 VOLTS, 3 PHASE
FOR MODELS PWC3634 AND PWC6034 AN EXTENSION CORD CAN BE
USED PROVIDED IT IS RATED AT LEAST 20 AMPS @ 600 VOLTS, 3 PHASE
SPECIAL NOTICE—THREE PHASE OPERATION
Models PWC3632, PWC3634, PWC6032 and PWC6034
All three-phase models are equipped with a three-phase monitor for added compressor
protection. The phase monitor, located in the control box, has multi-color LED that
reports status. The monitor protects the compressor from reverse operation, phase
loss and low voltage situations. Further description of the three-phase monitor is
located in the electrical section of the manual.
NOTICE - DO NOT OPERATE ANY THREE-PHASE UNIT BY BYPASSING THE
MONITOR, THIS WILL VOID THE WARRANTY

7
PWC ACCESSORIES
HOSE KIT
NOZZLE KIT
DISCHARGE
DUCT
ADAPTER
ROUND FLEX-DUCT
(SOLD SEPARATELY)
ROUND FLEX-DUCT
(SOLD SEPARATELY)
EVAPORATOR
RETURN AIR
PLENUM

NOZZLE KIT
NK-1 (2 X 4-Inch) PWC12
NK-2 (2 X 6-Inch) PWC18, 24
2NK-3(2 x 8-Inch) PWC36, PWC60
EVAPORATOR RETURN AIR PLENUM
DEP-10 (10-Inch Round) PWC12
2DEP-12 (12-Inch Round) PWC18, 24
DEP-16 (16-Inch Round) PWC36, 60
DISCHARGE DUCT ADAPTER
DDA-6 (6-Inch Round) PWC12
DDA-10 (10-Inch Round) PWC18, 24
2DDA-16 (16-inch Round) PWC36, PWC60
HOSE KIT
HK-1 10FT PWC 12, 18, 24
HK-225FT PWC 12, 18, 24
HK-540FT PWC 12, 18, 24
HK-310FT PWC 36, 60
HK-425FT PWC 36, 60
HK-640FT PWC 36, 60
PWC ACCESSORIES
8

9
ACCESSORIES
DISCHARGE AIR NOZZLE KIT ASSEMBLY
The optional discharge nozzle kits are used to direct the conditioned air to a specific
target area. By concentrating the airflow, the nozzles increase the air velocity towards
production lines to cool personnel and/or equipment. In server rooms, the nozzles can be
used to direct the airflow through the rack to remove the hot air from the area of the
equipment.
NK-1 for model PWC12, with (2) 4-inch diameter nozzles with an approximate
compressed length of 15 inches. The approximate extended length is 21 inches.
NK-2 for models PWC18, PWC24 with (2) 6-inch diameter nozzles with an
approximate compressed length of 22 inches. The approximate extended length is 32
inches.
2NK-3 for model PWC36 , PWC60 with (2) 8-inch diameter nozzles with an
approximate compressed length of 20 inches. The approximate extended length is 29
inches.
The nozzle kits come pre-assembles with the nozzles secured to a mounting plate, and
with edge guards. By removing the PWC discharge grille, one can insert the nozzle kit
into the opening without the use of tools.
Nozzle Kits

10
ACCESSORIES
EVAPORATOR RETURN AIR PLENUM
Evaporator return air plenums are available for installations where it is required to duct air to
the inlet of the evaporator. The evaporator return air plenums allow the user to connect round
duct (flexible or rigid) to the return air intake to reduce air noise and increase the number of
options for solving difficult cooling problems. The plenum attaches to the front of the unit, re-
placing the return air grille. Refer to the table below for configuration and application
information
DEP-10 for PWC12 transitions the return air opening to a 10-inch round duct.
2DEP-12 for PWC18 and PWC24 transitions the return opening to a 12-inch round duct.
DEP-16 for PWC36 and PWC60 transitions the return opening to a 16-inch round duct.
NOTE—When a DEP is installed, it is recommended to set the evaporator blower speed
to high, to avoid evaporator coil freeze-up.
Plenum Kit
Duct/
Flange PWC12 PWC18 PWC24 PWC36 PWC60 FILTERS
DEP-10
 (1) 10”X20”X1”
2DEP-12
12 inch   (1) 16”X24”X1”
DEP-16
16 inch   (1) 15”X30”X1”
(1) 10”X30”X1”
Maximum
Equivalent
Feet 25 50 50 50 100
Est. External
Static
Pressure (.20) (.25) (.25) (.25) (.50)
FILTER(S)
DEP—EVAPORATOR
RETURN AIR PLENUM

11
ACCESSORIES
Discharge Duct Adapter
Discharge duct adapters are available for applications where ducted evaporator discharge
is required. The adapters can be easily installed on the unit without fasteners, and be
installed for either vertical or horizontal ducting. The standard discharge grille is removed
and the DDA is attached in the grille opening.
DDA-6 for PWC12, converts the evaporator discharge to a 6-inch diameter round duct.
DDA-10 for PWC18 and PWC24, converts the evaporator discharge to a 10-inch diam-
eter round duct.
2DDA-16 for PWC36 and PWC60, converts the evaporator discharge to a 16-inch
diameter round duct.
When used in conjunction with the evaporator return air plenum, DEP, the unit can
provide closed-loop cooling to and from a given space without the influence of any out-
side air.
NOTE—When a DDA is installed, it is recommended to set the evaporator blower
speed to high, to avoid evaporator coil freeze-up.
Adapter
Model Round Duct Size PWC12 PWC18 PWC24 PWC36 PWC60
DDA-66-inch 
DDA-10 10-inch 
2DDA-16 16-inch 
Maximum Approx
Equivalent Feet 25 50 50 50 100
Maximum
E.S.P .15 .25 .25 .25 .50

12
ACCESSORIES
Hose Kit
Hose kits are available in lengths of 10, 25, and 40 feet. Each hose kit allows for conven-
ient installation of the PWC, while allowing for portability within the allowable space.
NOTE —When using these hoses in applications with water
pressures exceeding 50 PSIG, a water pressure reducing valve
must be installed in the water supply line prior to the hose kit;
otherwise warranty on the hose kits will be void.
All hose kits have FEMALE flare connectors to match the MALE flare fittings on the units
(see chart below). The WATER IN connector consists of a 3/4” hose barb. WATER OUT
and DRAIN (condensate) have no fittings, and can be fed to a sink or permanent drain.
When using a hose kit, avoid sharp corners, hot water pipes and kinking to assure proper
water flow of the supply, return, and drain lines.
Hose
Kit Length Flare Conn
IN-OUT-
DRAIN PWC12 PWC18 PWC24 PWC36 PWC60
HK-110 ft 3/8 3/8 3/8 
HK-225 ft 3/8 3/8 3/8 
HK-540 ft 3/8 3/8 3/8 
HK-310 ft 5/8 5/8 3/8 
HK-425 ft 5/8 5/8 3/8 
HK-640 ft 5/8 5/8 3/8 
Included with the hose kit is a sink/faucet adapter

13
SPECIAL ORDER ITEMS
In some applications, units can be manufactured with optional components for added
performance and longevity. Below are a few of the PWC options that are available.
Consult your distributor for pricing and availability.
CUPRO-NICKEL CONDENSER
When chemically treated water, salt water or brine, is used in the condenser coil, it is
recommended that the PWC be equipped with a 90/10 Cupro-Nickel condenser coil.
HIGH PRESSURE WATER VALVE
For applications where water supply pressures exceed 150 psig, a high pressure water
regulating valve can be installed in the PWC. Valves designed for use with up to 350 psig
water inlet pressure are available.
HERESITE TREATED EVAPORATOR COIL
For use in chemically corrosive environments, the PWC can be manufactured with a
Heresite® dipped evaporator coil for improved coil life.
HOT GAS BYPASS VALVE
In applications where low evaporator temperatures may occur, an optional hot gas bypass
valve can be installed to regulate the evaporator temperature. The bypass valve feeds
refrigerant (hot gas) into the evaporator to avoid low ambient freeze-ups.
MARITIME WATER VALVE
Cast naval bronze body with MONEL parts. MONEL is a “natural alloy” and is highly re-
sistant to corrosion.
TOWER UNITS
In applications where the PWC is connected to a closed-loop condenser water circuit, a
unit can be built for direct water connection WITHOUT a water valve.

14
INSTALLATION INSTRUCTIONS
RECEIVING—INSPECTION
Upon receiving your unit, inspect the packaging for any damage. All units are shipped on
a skid, and packaged in a triple-wall carton for added protection.
BEFORE INSTALLING
Check the unit for any damage. All OceanAire products are thoroughly inspected at the
factory and carefully packaged. If any damage is evident, contact OceanAire
IMMEDIATELY.
ELECTRICAL REQUIREMENTS
Check the nameplate located on the back of the unit to confirm the proper power is
available for the unit. Refer to "Specifications" section for voltage and amperage
requirements. For proper NEMA receptacles, refer to "Electrical service plug
configuration". When using extension cords, use the proper gauge cord, and check cord
voltage to the unit.
TIME DELAY FUSES/CIRCUIT BREAKERS ARE RECOMMENDED
WARNING—OPERATING THE UNIT ON IMPROPER
VOLTAGE WILL VOID THE WARRANTY
ACCESSORIES
Verify that all accessories are correct for the model, and are installed in accordance with
all instructions.
START-UP
Install the unit in accordance with all local and state building codes, and install all
accessories. Allow for a clearance around the unit for future maintenance and/or service.
Level unit and lock casters, when available. Connect power and test the LCDI on the
power cord (if available). Power up unit, via thermostat and check for proper operation.
Refer to Thermostat Operation for more details.

15
THERMOSTAT OPERATION
FAN SLIDE SWITCH
The FAN Slide Switch allow you to set the fan mode from ON (fan is on all the time) to
AUTO (fan cycles under thermostat control)
MODE SLIDE SWITCH
To turn the unit ON, slide the Mode Slide Switch down to the COOL position. To turn the
unit OFF, slide the Mode Slide Switch to the OFF Position.
TEMPERATURE BUTTONS
Once the MODE switch has been put into the COOL mode, push the corresponding arrow
button to lower or raise the set point to the desired temperature. The display will show
the set-point temperature with the word “SET” and will blink for 5 seconds. Then it will
return to display the room temperature. After the time delay has been satisfied, the fan
motor and compressor will start, beginning the cooling cycle. Remember, the set-point
must be lower than the room temperature for the unit to start.
AUTO
ON
COOL
OFF
TEMPERATURE
CHANGE
BUTTONS
FAN
SLIDE
SWITCH
MODE
SLIDE
SWITCH
TEMPERATURE
DISPLAY
DIGITAL, NON-PROGRAMMABLE THERMOSTAT
This is a cooling only thermostat *. Select the temperature you want by pressing the ▲ or
▼ buttons.
No batteries are required. If there is a power failure, the thermostat will start up at the last
known set point, when the power is restored.
Compressor short cycle protection is a built-in feature of the thermostat. A 4-minute time
delay will occur on start-up or when power has been restored after a power interruption.
*New cooling thermostat , effective 01-19-2016 , on units with S/N: U1

16
Water Valve
Adjustment Screw
All PWC units come equipped with an automatic pressure regulated water valve
which controls the condenser water flow rate. The water valve will open when the
system is running, and will adjust the water flow rate based on the temperature of the
supply water.
In some cases, water temperatures can cause the valve to open and close at a high
rate, causing a “chattering” condition in the water supply line. In these cases, it is
recommended that the water valve be adjusted.
1. Disconnect the unit power.
2. Remove the unit back panel and locate the water regulating valve in the lower
right region of the unit.
3. Locate the water valve adjustment screw. At the top of the valve there is a square
-shaped adjustment screw.
4. Turn the adjustment screw 1/4 turn CCW to raise the low side operating
pressure...or...CW to lower the low side operating pressure.
5. Re-install the back panel and turn the unit on.
WATER VALVE ADJUSTMENT

Evaporator
Blower
Evaporator
Coil
Condensate
Pump
Control
Box
Water
Valver
High Pressure
Reset Switch
Compressor
PWC INTERIOR
17

REPLACEMENT PROCEDURE FOR PARTS
IT IS RECOMMENDED THAT ALL OCEANAIRE UNITS BE
SERVICED BY A LICENSED TECHNICIAN
WARNING—TO AVOID INJURY, DISCONNECT UNIT POWER
PRIOR TO SERVICING
A. FAN MOTOR
1. Remove cabinet left-side panel (when looking at the front of the unit).
2. Evaporator fan motor—disconnect evaporator motor wires from evaporator fan
contactor and fan speed rocker switch.
3. For all model sizes 12, 18, 24, and 36, remove the screws securing motor and
inlet-ring to blower housing (all screws are external and visible), and remove blower
wheel-motor assembly. Remove the blower wheel set screw and disassemble the blower
wheel from the motor shaft and remove the motor.
For model size 60—loosen blower wheel shaft set screw, and remove the screws
securing the motor mount to the blower housing and remove motor and mount. Remove
the motor from the motor mount.
4. Install the new motor, reversing the removal procedure.
B. THERMOSTAT (NO BATTERIES REQUIRED)
1. Along both sides of the thermostat, insert a small flat blade screwdriver in the groove.
With a twisting motion, remove the cover plate from the sub base. Make sure the small
thermistor located near the top of the casing for temperature sensing, is not bent or
damaged.
2. To remove the thermostat sub-base, remove the 2 mounting screws and the 4 wires
(black, red, white, green). Make sure the 4 wires do not fall into the cabinet. Install
sub-base by reversing removal procedure.
C. CONDENSATE ALARM LIGHT
To replace the Condensate Alarm Light, disconnect the wires from the lamp and bend
the tinnerman clip retaining light and pull out. Install new light, reversing the procedure.
D. CONDENSATE PUMP
1. Remove brackets securing condensate pump in base pan.
2. Disconnect pump wire leads at Molex connectors. Remove retainer clamp and tubing.
3. Replace pump, install by reversing procedure.
E. HIGH PRESSURE SAFETY SWITCH
1. Remove cabinet right side panel, or rear panel of Model 60.
2. Remove flare nut that secures capillary to the refrigeration system high pressure side.
A Schrader valve is located in the discharge port, and allows removal without losing
the refrigerant charge.
3. Remove two screws that secure high pressure switch.
4. Disconnect wire leads from compressor contactor and condensate pump safety switch.
5. Install new High Pressure Control, reversing the procedure.
To gain access to compressor and compressor run capacitor, remove left side panel.
18