RECEIVING THE AIR CONDITIONER .............................................................................................................................................................. 3
HANDLING AND TESTING THE AIR CONDITIONER ................................................................................................................................. 3
SYSTEM CONTROLS .......................................................................................................................................................................................... 4
Level I Temperature Controller ............................................................................................................................................................. 4
Level II and III Temperature Controller ............................................................................................................................................... 4
TECHNICAL INFORMATION ............................................................................................................................................................................ 5
Components List ........................................................................................................................................................................................ 7
Parts List ........................................................................................................................................................................................................ 7
Wire Diagrams and schematics ............................................................................................................................................................ 8
Wire Diagram, Level II and III, 2000 BTU ..................................................................................................................................10
Wire Diagram, Level II and III, 4000 BTU ..................................................................................................................................12
TEMPERATURE CONTROL .............................................................................................................................................................................14
PRINCIPLES OF OPERATION .........................................................................................................................................................................14
Inlet Air Filter .............................................................................................................................................................................................14
How To Remove, Clean or Install a New Inlet Air Filter ..............................................................................................................15
Condenser and Evaporator Air Movers ............................................................................................................................................15
Basic Air Conditioning Trouble Shooting Check List ..................................................................................................................16
Symptoms and Possible Causes: ........................................................................................................................................................17
RETURN AND REPAIR POLICY ......................................................................................................................................................................18
LIMITATION OF LIABILITY ..............................................................................................................................................................................19
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 McLean Cooling Technology -- within 15
days of delivery. Save the carton and packing material and request an inspection. Then le a claim with the delivering
carrier.
Pentair Technical Products 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 ve (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 lled
with lubricating oil. This will cause permanent damage to the air
conditioner and also voids the warranty.
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 ve (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 lter 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.
1. Inspect air conditioner and verify functionality before mounting the air conditioner, see HANDLING
AND TESTING THE AIR CONDITIONER on page 3.
2. Using the cutout dimensions shown in this manual, 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 Kit on page 6 for
proper location.
4. Mount air conditioner on enclosure using mounting bolts and washers provided to secure unit to
enclosure. Allow unit to remain upright for a minimum of ve (5) minutes before starting. Caution! Air
conditioner must be in upright position during operation.
5. Refer to the top of the 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.
6. When the unit is equipped with an automatic temperature controller, the controller is preset at the
factory for your convenience and should not require adjustment.
SYSTEM CONTROLS
Level I Temperature Controller
The Level I controller is located inside the air conditioner.
To adjust, disconnect power to the air conditioner and
open the front panel by loosening the front panel screw.
Refer to Figure 2 on page 7 to locate the controller. Turn
the controller adjustment screw slot counter-clockwise
to increase and clockwise to decrease the temperature
set point, see Figure 1. The thermostat cooling set point is
indicated by the alignment of the adjustment screw slot
with the dial decal. After completing adjustment, close
the front panel and tighten the front panel screw. Restore
power to the air conditioner for operation.
Level II and III Temperature Controller
The Level II and III controller mounted on the air
conditioner front panel is factory set for standard
operation. All operating parameters are programmable
for custom applications. Refer to the Level II and III
programming and Operating Instruction Manual,
10-1008-161.
The electromechanical thermostat is factory preset to 75 F/23 C. To change the temperature setting, refer to SYSTEM
CONTROLS on page 4.
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 ows 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.
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 ttings) 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 tting covers be loosened, removed or tampered with.
Breaking of seals on compressor access ttings 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 lter, located behind the front cover, will assure normal operation of the air
conditioner. If lter 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 lter (or
plugged condenser coil), the air conditioner’s compressor will stop operating due to actuation of the thermal overload
cut-out 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 lter or coil has been cleaned. It is recommended that power to the air conditioner be interrupted
intentionally when abnormally high compressor operating temperature causes automatic shut-down of the unit.
The above described shut-down is symptomatic of a clogged or dirty lter, thus causing a reduction in cooling air ow
across the surface of the compressor and condenser coil.
Do not run the air conditioner for extended periods of time with the lter removed. Particles of dust, lint, etc., can plug
the ns of the condenser coil which will give the same reaction as a plugged lter. The condenser coil is not visible
through the lter opening, so protect it with a lter.
Continued operation under the above conditions can and will damage and shorten compressor life. The air
conditioner is available with an easily removable inlet lter to facilitate necessary cleaning. There should be no reason
to neglect this necessary maintenance.
How To Remove, Clean or Install a New Inlet Air Filter
RP aluminum washable air lters are designed to provide excellent ltering eciency with a high dust holding
capacity and a minimum amount of resistance to air ow. Since they are constructed entirely of aluminum, they are
lightweight and easy to service. Optimum lter performance is maintained by recoating the lters after washing with
RP Super Filter Coat adhesive. To achieve maximum performance from your air handling equipment, air lters should
be cleaned on a regular basis.
The inlet air lter is located behind the right side panel. To access the lter, pull from slot on top cover. The lter may
now be cleaned or a new lter installed.
Cleaning Instructions:
1. Flush the lter with warm water from the exhaust side to the intake side. DO NOT USE CAUSTICS.
2. After ushing, allow lter to drain. Placing it with a corner down will assure complete drainage.
3. Recoat the lters with RP Super Filter Coat adhesive. When spraying lter do so from both sides for
maximum concentration of adhesive.
Condenser and Evaporator Air Movers
Blower motor requires no maintenance. All bearings, shafts, etc. are lubricated for the life of the motor during
manufacturing.
If one of the condenser impeller motors (ambient impellers) should fail, it is not necessary to remove the air
conditioner from the cabinet or enclosure to replace the blower. The condenser blower is mounted on its own
bulkhead and is easily accessible by removing the front cover.
CAUTION
Operation of the air conditioner in areas containing airborne
caustics or chemicals can rapidly deteriorate lters, condenser
coils, blowers and motors, etc. Contact Pentair Technical Products
for special recommendations.
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 qualied
professionals, generally available through a local, reputable air conditioning repair or service company.
Refer to the data on the nameplate which species 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.
Basic Air Conditioning Trouble Shooting Check List
1. Check manufacturer’s nameplate located on the unit for correct power supply.
2. Turn on power to the unit. The evaporator (Enclosure or “COLD” air) blower should come on. Is there
airow?
YES, proceed to step 3.
NO, possible problem:
• Open motor winding
• Stuck blower motor
• Obstructed wheels/blades
Repair or Replace
defective part
3. Check thermostat setting and adjust thermostat to the lowest setting. This should turn on the
condenser blower and compressor. Did condenser blower and compressor come on when the
thermostat was turned on?
YES, proceed to step 4.
NO, possible problem:
• Defective thermostatReplace part
4. Are both blowers and the compressor running? If not, the unit will not cool properly.
5. Check condenser (Ambient or “HOT” air) blower for airow. Is there airow?
YES, proceed to step 6.
NO, possible problem:
• Defective thermostat
• Open motor winding
• Stuck blower motor
• Obstructed wheels/blades
Repair or Replace
defective part
6. Carefully check the compressor for operation - motor should cause slight vibration, and the outer case
of the compressor should be warm. Is the compressor showing signs of this?
YES, wait 5 minutes, then proceed to step 7.
NO, possible problem:
• Defective thermostat
• Defective capacitor
• Defective overload
• Defective relay
7. Make sure the coils are clean. Then check evaporator “air in” and “air out” temperatures. If the
temperatures are the same:
• Possible loss of refrigerant
• Possible bad valves in the compressor
8. To check for a bad thermostat, turn power o to the unit. Remove control box cover and place both
thermostat wires onto one terminal (replace control box cover for safety). This will bypass the switch
in the thermostat. Turn on the power. If both blowers and the compressor come on, the thermostat
needs to be replaced.
Pentair Technical Products warrants that the Goods manufactured by Pentair Technical Products will be free
from defects in material and workmanship for a period of one (1) year from the date of shipment by Pentair
Technical Products, subject to the following conditions and exclusions:
A. Conditions. All Goods must be installed and operated according to the following specications:
1. Maximum voltage variation no greater than plus or minus 10% of nameplate nominal rating;
2. Maximum frequency variation no greater than plus or minus 3 Hz. of nameplate nominal rating;
3. Must not exceed minimum and maximum stated temperatures on the nameplate;
4. Must not exceed (BTU/Hr) rating, including any heat sink as indicated on the nameplate;
5. Refrigerant bearing Goods must not be restarted for a period of one (1) minute after intentional or
accidental shut-o;
6. The lters (if applicable) must be cleaned regularly;
7. The Goods and any parts thereof must not be modied, unless prior written authorization is received
from Pentair Technical Products; and
8. All Goods must be installed and grounded in accordance with all relevant electrical and safety codes,
as well as the National Electric Code and OSHA rules and regulations.
9. All Goods must be installed in a stationery application, free of vibration.
A violation of any one of these conditions shall render the warranty hereunder void and of no eect.
B. Exclusions. This warranty shall be void if product is misapplied in any way or:
1. Buyer specied product is inappropriate for system or environment in which it is operating.
2. Pentair Technical Products product modied in any way without prior written authorization from
Pentair Technical Products.
3. Removal or modication of Pentair Technical Products label axed to product without written Pentair
Technical Products approval.
Pentair Technical Products must be notied of a claim in writing not later than fourteen (14) days from the
date when Buyer has become aware of such occurrence, or where the defect is such that it may cause damage,
immediately, such notice containing a description of how the defect manifests itself. Failure to provide such
prompt notice to Pentair Technical Products shall result in forfeiture of Buyer’s rights under this warranty.
In the event of a warranty claim, Buyer is to return defective goods to Pentair Technical Products in accordance
with Pentair Technical Products Return Policy. Warranty period for repaired goods remains at 1 year from
shipment of original goods. Pentair Technical Products sole obligation to Buyer under this warranty will be, at
Pentair Technical Products option:
A. Repair or replace Pentair Technical Products products or parts found to be defective in material or
workmanship.
B. Issue credit for the purchase price paid by Buyer relating to such defective Goods or part.
THIS WARRANTY CONSTITUTES THE ENTIRE WARRANTY WITH RESPECT TO THE GOODS AND IS IN LIEU OF ALL
OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY
AND IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.
RETURN AND REPAIR POLICY
Pentair Technical Products products that: (i) are made to order, (ii) have been modied by Buyer, (ii) have
special nishes, or (iv) are determined by Pentair Technical Products to constitute “custom” products that
cannot be returned to stock or resold to other Buyers, will not be accepted for return by Pentair Technical
Products.
All returns require a Return Material Authorization number (RMA #), regardless of reason for return, whether
it be for warranty or out of warranty repair. Returns without an RMA # will be refused by our Receiving
Department. An RMA # is valid for 60 days.
A. An RMA # will be issued by our Repair Department in Anoka, MN at 866-545-5252. Buyer should have
following information available at time of RMA request:
1. Complete Model Number, Serial Number and description of damaged unit being returned.
2. Original Buyer Purchase Order number and date product was received by Buyer.
3. Quantity to be returned and a brief description of failure for each unit, if dierent.
4. Contact information of Buyer that must include: name of company, billing and shipping address,
phone, number, fax number, freight carrier and the name and phone number of a Buyer contact who
can elaborate on the claimed defect in detail.
5. Buyer must provide a Repair Purchase Order number for both warranty and out of warranty repairs.
The PO will not exceed 50% of a new unit. Buyer will be notied of repair charges that exceed
approved PO amount.
B. All returns to Pentair Technical Products must be securely packed, using original cartons if possible. All
returns must have the RMA number visible on the outside of the carton. Pentair Technical Products is not
responsible for material damaged in transit. Any refrigerant-bearing Goods must be shipped upright for
return.
C. Shipping cost for all non-warranty repairs is the responsibility of the sender and must be shipped prepaid.
Shipping costs for all warranty related repairs will be covered by Pentair Technical Products provided the
goods are returned using a Pentair Technical Products approved carrier. If after diagnoses the product is
determined by Pentair Technical Products not be covered under warranty, Buyer will be responsible for all
shipping charges and will be billed accordingly.
D. Non-warranty repairs are subject to a $75 minimum analysis fee. Analysis fee will be waived if Buyer
approves repair work. If approval is not received within 30 days, material will be scrapped and all shipping
expenses and corresponding analysis fees will be billed to Buyer.
E. At Buyer’s request, Failure Analysis can be provided by Pentair Technical Products for warrantable goods at
no charge. Failure analysis for non-warranty repairs are subject to a $100 per hour Engineering charge plus
any other incurred testing costs.
F. All returned merchandise must be sent to the following address: Pentair Technical Products, 2100 Homan
Way, Anoka, MN 55303-1745.
G. Credit for accepted returns shall be at the original selling price or the current selling price, whichever is
lower, less the restocking charge indicated as follows:
1. Within 60 days of invoice date - 20% of applicable selling price.
2. Within 61-120 days of invoice date - 30% of applicable selling price.
3. Within 121-180 days of invoice date - 40% of applicable selling price.
4. Beyond 180 days - subject to individual review by Pentair Technical Products.
If product being returned for credit requires repair or modication, the cost of any labor or material necessary
to bring product into saleable condition will be deducted from credit. Buyer may not take credit against
returns without prior written Pentair Technical Products approval.
LIMITATION OF LIABILITY
PENTAIR TECHNICAL PRODUCTS WILL NOT BE LIABLE UNDER ANY CIRCUMSTANCES FOR ANY INCIDENTAL,
CONSEQUENTIAL OR SPECIAL DAMAGES, INCLUDING WITHOUT LIMITATION ANY LOST PROFITS OR
LABOR COSTS, ARISING FROM THE SALE, USE OR INSTALLATION OF THE GOODS, FROM THE GOODS BEING
INCORPORATED INTO OR BECOMING A COMPONENT OF ANOTHER PRODUCT, FROM ANY BREACH OF THIS
AGREEMENT OR FROM ANY OTHER CAUSE WHATSOEVER, WHETHER BASED ON WARRANTY (EXPRESSED
OR IMPLIED) OR OTHERWISE BASED ON CONTRACT, OR ON TORT OR OTHER THEORY OF LIABILITY, AND
REGARDLESS OF ANY ADVICE OR REPRESENTATIONS THAT MAY HAVE BEEN RENDERED BY PENTAIR TECHNICAL
PRODUCTS CONCERNING THE SALE, USE OR INSTALLATION OF THE GOODS