Pfannenberg DTS 3081 User Manual

Fault Possible

Unit fails to
cool. Internal
fan is running.

Unit fails to
cool suffi­ciently.

Fault contacts
are opened.

Condensate
accumulates in
switch cabinet.

Condensate
fails to drain.

Cause

Temperature setting to
high.

Required cooling capacity
exceeds capacity of unit.

Dirty filter or condenser.
Lack of refrigerant.

Internal and external fans
not working.

Air not circulating properly
inside the switch cabinet.

Power has been interrupted
from unit. High pressure
switch has cycled due to
dirty condenser circuit.

Exiting temperature is too
low. Enclosure is not
sufficiently sealed.

Condensate drain is
clogged.

Check temperature setting.

Check ambient temperature and internal
load.

Clean condenser. Clean or replace filter.
Call authorized technician. Check unit

for leaks.
Call authorized technician. Check fan

capacitors. Replace fans.
Check enclosure and air circulation

inside enclosure. Air intake and exhaust
must be unimpeded by components.

Establish power to unit. Check condition
of filter and condenser and clean if
necessary. Check ambient conditions.

Set cooling unit to a higher temperature
setting. Close enclosure door and
improve the seal in the enclosure.

Clean condensate drainage. Conden­sate drainage hose must be inclined
downward without showing a bend.

Remedy

Changing of Filter:

Lift gently on upper right corner of filter housing. Remove filter and

follow recommendations for cleaning.

Maintenance:

The cleaning intervals depend upon the relevant operating conditions. In
particular, observe the following instructions:

Clean the heat exchanger regularly.
Clean the heat exchanger using a soft brush or pressurized air.
It is recommended that the condensate run off opening be checked regu-

larly.
If the cooling units are provided with a filter, clean the filter mat regularly.

The cleaning intervals or the intervals for replacement of the filter mat
mainly depends upon ambient conditions (air quality.)

You can rinse the filter mat using water heated to 40 C and commercially
available mild detergent.

It is possible to remove any dirt by knocking the mat slightly, vacuum
cleaning it or blowing it out.

If the filter mat is oily or greasy, please replace.

Safety:

Cooling units produced by Pfannenberg are designed for dissipating heat from
switch cabinets. During each cooling process condensate can be produced.

The cooling unit may only be used under the ambient conditions specified on
the enclosed sheet.

The cooling unit is to a large measure maintenance-free, (See Maintenance
Section)

Every other use is considered as non-authorized use making any warranty null
and void.

The electrical equipment must be regularly checked. Any faults such as loose
connections or scorched cables must be removed immediately.

Work on the cooling system and on electrical components may only be carried
out by authorized specialist personnel.

Compliance with applicable safety and environmental regulations is mandatory.

Warranty Conditions:

(WARRANTY IS VALID FOR 1 YEAR)

Warranty becomes null and void:

In case of improper usage of the unit, noncompliance with operating conditions
or nonobservance of instructions.

If operated in rooms in which corrosives or acids are present in the atmosphere.
In case of damage caused by contaminated or jammed air filters.
If a non-authorized person interrupts the cooling circulation, modifies the unit or

changes the serial number.
In case of damage caused by transport or by accidents.
For the exchange of parts by non-authorized companies.
In order to maintain your warranty rights please observe the following when

returning the unit.
Enclose an exact description of the fault in the shipping package.
Enclose proof of delivery (delivery note or copy of invoice).
Return the unit together with all accessories; use the original packaging or

packaging of equivalent quality, send the unit freight prepaid and covered by an
adequate transport insurance.

Subsidiary of the Pfannenberg Group

68 Ward Road—Lancaster, NY 14086

Phone: [phone]—Fax: [phone]

www.pfannenbergusa.com

Pfannenberg Inc.

885408000a

DTS 3041, 3061, and 3081

Indoor and Outdoor Cooling Units

Unpacking:

Prior to and during unpacking make a visual inspection of the cooling unit
to see whether any damage has occurred during transportation.

Pay special attention to loose parts, dents, scratches, visible loss of oil etc.
Any damage must be reported immediately to the delivering carrier.

Save the carton and packaging material and request an inspection.
Then file a claim with the delivering carrier.
Before disposing of packaging material ensure that it does not contain any

loose components.

Danger!

Burrs caused by production may be present on the metal edges of
the unit. Always wear protective gloves when carrying out mainte-

nance work and installation. In case of a warranty claim, exact de-

tails on the fault (photograph, if possible); the unit part number and

serial number of the cooling unit are required.

Handling:

Storage:

Failure to observe these instructions will render the warranty provisions
null and void.

If it is necessary to store the air conditioner in a horizontal position prior to
mounting, make sure that it is placed in a vertical position for a minimum of
1 hour prior to starting the unit.

Running the compressor without oil in the compressor will cause perma­nent damage to the air conditioner, and void the warranty of the unit.

TEST THE UNIT FOR FUNCTIONALITY PRIOR TO

MOUNTING THE AIR CONDITIONER ON THE

ENCLOSURE.

Mounting Insulation Installation:

Top Iso—Ensure notch and groove match
sides.

“Q Mount”

Mounting Studs

Side Iso—Side Iso must be applied on
mounting holes on left and right sides.

Must extend to side Iso mid unit and
bottom of unit.

Diagram A

[Drilling Template Available on http://www.pfannenbergusa.com]

General Information:

Installation:

When tightening the bolts the gasket should be evenly compressed half the
thickness of the gasket.

Over compression of the gasket will not provide a better seal to the enclosure.

MAKE SURE NOTHING IS MOUNTED 6 INCHES IN FRONT OF INLET FAN.

Testing and Startup Procedure:

Operating Conditions:

+ / - 3Hz + / - 10%

Hz

When unit is plugged in, the drawn-in switch cabinet internal air tempera­ture is measured by a temperature sensor.

If the compressor and condenser fan do not turn on, adjust the thermostat
down to a lower setting that will call for the compressor and condenser
fan.

You should feel a temperature difference between the inlet and outlet air.

Door Contact: (All Units)

To avoid an increased production of condensate and for safety reasons a
door limit switch should be connected to the terminals provided (see
circuit diagram, housing cover or supplement.)

Technical Information:

Overall Dimensions: H x W x D: 515mm [25in] x 255mm [10in] x 266mm [10in]

DTS 3041/61/81: (Voltage: 115V 60Hz / 100V 50Hz, Single Phase)

Amp Draw: 6.0
Capacity (95F/95F) [35C/35C]: 2700 BTUH [800 W]
Weight: 50 Lbs. [250 Kg]

DTS 3041/61/81: (Voltage: 208-230V 60Hz / 230V 50Hz, Single Phase)

Amp Draw: 3.0
Capacity (95F/95F) [35C/35C]: 250 BTUH [730 W]
Weight: 50 Lbs. [25.0 Kg]

Overall Dimensions: mm [inches]

If the cooling unit is mounted on a switch cabinet door, it must be

CAUTION!

confirmed that the hinge can support the additional weight or that the

switch cabinet will not topple over when the door is opened.

CAUTION!

Make cutouts required to the enclosure prior to mounting the air con-

ditioner. Make sure that metal particles are not allowed to enter the

enclosure.

Electrical Connection:

All power connections and repairs should be carried out by an authorized
trained electrician.

No other equipment should be connected to this circuit to prevent overloading.
Both main voltage and frequency must correspond to the nominal values indi-

cated on the nameplate of the cooling units.

ATTENTION!

THE COOLING UNIT MAY BE DAMAGED IF THE VOLTAGE IS TOO HIGH.

Minimum Circuit Protection Class CC

NAME PLATE

125% of Run Load Amps

Short Circuit Protection for Units is 200 Amps

MAX 3mm [0.12”]

MAX 3.5mm [0.14”]

Centralized Fault Indication:

The signal of a fault in the cooling unit is caused by the high pressure
switch being opened.

This fault is displayed by the breaking of a potential-free contact.
Therefore, if the fault wire breaks, a fault signal will be simulated.

WARNING!

THE CONTACTS MAY BE LOADED WITH MAX. 230V, 10A.