Seifert 872520201USL User manual

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Table of Content 872520201USL

1. User manual 2 ..................................................................................................................................

2. Legal regulations 2 .........................................................................................................................

3. Safety instructions 3 ......................................................................................................................

4. Controller functions 4 .....................................................................................................................

5. Functional principle 7 .....................................................................................................................

6. Technical data 8 ..............................................................................................................................

7. Mounting 9 .......................................................................................................................................

8. Mounting Principle 10 .....................................................................................................................

9. Dimensions (H x W x D) 11 .............................................................................................................

10. Electrical connection 12 ...............................................................................................................

11. Wiring diagram 12 .........................................................................................................................

12. Taking into operation 13 ..............................................................................................................

13. Trouble shooting 14 ......................................................................................................................

14. Maintenance & Cleaning 14 .........................................................................................................

15. Transport & Storage 15 ................................................................................................................

16. Parts supplied 15 ..........................................................................................................................

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1. User manual

This instruction manual contains information and instructions to enable the user to work safely, correctly and

economically on the unit. Understanding and adhering to the manual can help one:

Avoid any dangers.

Reduce repair costs and stoppages.

Extend and improve the reliability and working life of the unit.

PLEASE ENSURE TO USE THE RIGHT VERSION OF THE INSTRUCTION MANUAL SUITABLE FOR YOUR

UNIT.

Conditions of use

󰾬The unit is to be used exclusively for the dissipation of heat from control cabinets and enclosures in order to

protect temperature sensitive components in an industrial enviorment. To meet the conditions of use, all the

information and instructions in the instruction manual must be adhered to.

General danger

Indicates compulsory safety regulations which are not

covered by a speciﬁc pictogram such as one of the following.

󰾬

High electric voltage

Indicates electric shock danger.

Important safety instruction

Indicates instructions for safe maintenance and operation of

the unit.

Attention

Indicates possible burns from hot components.

Attention

Indicates possible damage to the unit.

Instruction

Indicates possible danger to the environment.

2. Legal regulations

Liability

The information, data and instructions contained in this instruction manual are current at the time of going to

press. We reserve the right to make technical changes to the unit in the course of its development. Therefore,

no claims can be accepted for previously delivered units based on the information, diagrams or descriptions

contained in this manual. No liability can be accepted for damage and production caused by:

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Disregarding the instruction manual

Operating error

Inappropriate work on or with the unit

The use of non-speciﬁed spare parts and accessories

Unauthorised modiﬁcations or changes to the unit by the user or his personnel

The supplier is only liable for errors and omissions as outlined in the guarantee conditions contained in the main

contractual agreement. Claims for damages on any grounds are excluded.

3. Safety instructions

Upon delivery the unit is already meeting current technical standards and can therefore be safely taken into

operation. Only authorised personnel is allowed to work on the unit. Unauthorised personnel must be prohibited

from working on the unit. Operating personnel must inform their superiors immediately of any malfunction of

the unit.

Please note that before starting to work on or with the unit, a procedure must be carried out inside the cabinet

on which the unit is to be mounted.

Before commencing work inside the cabinet, the control cabinet manufacturer's instruction must be read with

regards to:

Safety instructions.

Instructions on taking the cabinet out of operation.

Instructions on the prevention of unauthorised cabinet reconnection.

The electric equipment meets the valid safety regulations. One can ﬁnd dangerous voltages (above 50 V AC or

above 100 V DC)

Behind the control cabinet doors.

On the power supply in the unit housing.

The unit has to be operated according to the type plate and the wiring diagram, and must be protected

externally from overloading and electrical faults via suitable protective devices such as ground fault protection

breakers.

Danger through incorrect work on the unit

The unit can only be installed and maintained by technical competent and qualiﬁed

personnel, using only supplied material according to the supplied instructions.

󰾬

Danger from electrical voltage

Only specialised personnel are allowed to maintain and clean the unit. The personnel must

ensure that for the duration of the maintenance and cleaning, the unit is disconnected from

the electrical supply.

Attention

Damage to the unit through the use of inappropriate cleaning materials. Please do not use

aggressive cleaning material.

Instruction

Damage to the environment through unauthorised disposal. All spare parts and associated

material must be disposed according to the environmental laws.

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4. Controller functions

The air conditioner unit is intended to be used as a complementary accessory to larger industrial

equipment. The unit is used where heat needs to be dissipated from electrical control cabinets or similar

enclosures in order to protect heat sensitive components. It is not intended for private / household use.

The unit has two completely separate air circuits which ensure that the clean cabinet air does not come into

contact with the ambient air which may well be dirty or polluted.

Enclosure cooling units can dissipate large quantities of heat from sealed enclosures such as electrical

enclosures into the ambient air and at the same time reduce the cabinet internal temperature to below that of

the ambient air.

The unit can function without problems in extreme ambient conditions (e.g. dusty and oily air) with a standard

operating temperature ranging between +10°C (50°F) and +55°C (131°F). Units can be ordered with an

additional electrical cabinet heater. For the cooling capacities and evironmental ratings please refer to the type

plate data.

Controller

The display shows the temperature in the range of -50°C to +150°C (-58°F to +302°F). The temperature is

displayed with resolution of tenths between -19.9°C and +99.9°C (-3.8°F to +211.8°F). During programming, it

shows the codes and values of the parameters. The display also shows icons according to occurring events.

Display icons

Icon Function Description

1 Compressor relay active Flashes when activation is delayed or inhibited by

protection times, external disabling or other procedures

in progress

2 Alarm relay active

3 Heater relay active

4 Ambient blower relay active

Alarm Flashes when alarms are active

Heating mode Signals operation of unit in heating mode

Cooling mode Signals operation of unit in cooling mode

TEST Text mode in progress Activated only by manual procedure

Programming

The operating parameters can be modiﬁed using the front keypad. Access diﬀers depending on the type of

parameter. Access to conﬁguration parameters is protected by a password that prevents unwanted

modiﬁcations or access by unauthorised persons.

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Setting cooling set point, St1:

1. Press “SET” and display should show St1 and then the pre-set value of St1. (default: +35°C / +95°F)

2. Reach the desired value by using ▲ or ▼.

3. Press “SET” again to save the new value of St1.

Setting heating set point, St2 (only for units supplied with internal heater):

1. Press “SET” twice slowly and display should show St2 and then the pre-set value of St2. (default: +5°C /

+41°F)

2. Reach the desired value by using ▲ or ▼.

3. Press “SET” again to save the new value of St2.

󰾬Setting temperature units (°C / °F), low temperature alarm and high temperature alarm:

1. Press “PRG” button for 5 seconds to reach the modiﬁable parameter list.

2. Use ▲ or ▼ to reach the desired parameter:

C18 for temperature unit of measure

°C = 0

°F = 1

P25 for low temperature alarm threshold (default -10°C / +14°F)

P26 for high temperature alarm threshold (default +55°C / +131°F)

3. Press “SET” on the desired parameter to display the current value.

4. Use ▲ or ▼ to reach the desired value.

5. Pressing “SET” temporarily saves the new value and returns to the parameters list.

6. Repeat steps 2-5 to set other parameters.

7. Press “PRG” for 5 seconds to permanently save the new values.

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Set Point Parameter Default Range

Cooling St1 35°C / 95°F 20°C - 50°C / 68 -122°F

Heating (for units with heater) St2 5°C / 41°F -20°C - 20°C /-4°F - 68°F

Low Temperature Alarm P25 -10°C / 14°F -50°C - P26 / -58°F - P26

High Temperature Alarm P26 55°C / 131°F P25 - 150°C / P25 - 302°F

Test function:

Diﬀerent test functions can be used depending on the combination of keys pressed. Such tests run for the

duration of 4 minutes.

“SET+▲” tests Compressor and Ambient Blower relays.

“SET+▼” tests Alarms and Heater relays

Alarm Relay Operation:

Both normally closed (NC) and normally open (NO) alarm contacts are provided. These refer to the alarm state.

Under normal conditions, the NC contact is closed and the NO contact is open. When an alarm condition is

present or the door contact is open, the NC contact will open and the NO contact will close. System power

failure will give an alarm condition.

State Alarm relay Display

1 System powered OFF

2 System powered ON

- NO ALARM

- Door Contact Closed

3 System powered ON

- Door Contact Open

4 System powered ON

- ALARM STATE

Notes:

State 2: Additional icons (1,3,4, Reverse, Direct, Test) depending on operation.

State 3: The display shows “OFF” alternating with the standard display.

State 4: The display shows “EXX” alternating with the standard display – at the same time, the alarm icon

ﬂashes.

Typical alarm codes:

Error Code Description

E01 Probe B1 fault

E02 Probe B2 fault

E04 High temperature alarm

E05 Low temperature alarm

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Important Notes:

Whilst programming, if no button is pressed for 10 seconds, the display starts ﬂashing, and after 1 minute

returns to the main display without saving changes.

To increase scrolling speed, press and hold the ▲ or ▼ button for at least 5 seconds.

When pressing “PRG” for 3 seconds, the ﬁrmware revision code is displayed for 2 seconds.

When cleaning the controller panel, do not use ethanol, hydrocarbons, ammonia or their by-products.

Use neutral detergents and water.

In order to protect the unit’s components, minimum relay output on (3 or 7 minutes) and oﬀ (4 minutes)

times and minimum time (7 or 11 minutes) between activation of the same relay output are applied.

In case of digital inputs not conﬁgured, probes not ﬁtted or conﬁgured, or St2 not enabled on the

controller the display shows ‘nO’.

5. Functional principle

The unit functions on the principle of the compression refrigerator. The main components are: refrigerant

compressor, condenser, choke and evaporator. these four components of the refrigerant plant are connected

with each other by pipes to form a hermetically sealed system in which the refrigerant (R134a)

circulates. R134a is chlorine free and has an Ozone Destruction Potential [ODP] of 0 and a Global Warning

Potential [GWP] of 1430.

1. Air intake, cabinet side 7. Radial fan, ambient side

2. Radial fan, cabinet side 8. Condenser

3. Evaporator 9. Air outlet, ambient side

4. Air outlet, cabinet side 10. Filter dryer

5. Compressor 11. Capillary pipe

6. Air intake, ambient side

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6. Technical data

Order Number 872520201USL

Cooling capacity 95F/95F 8,500 BTU

Cooling capacity 95F/122F 7,650 BTU

EER L35L35 1.8

Compressor Reciprocating compressor

Refrigerant / GWP R134a / 1430

Refrigerant charge 360 g / 12.5 oz

High / low pressure 390 / 75 psig

Temperature range -40˚F - 131˚F

Air volume ﬂow (system / unimpeded) Ambient: 440 / 520 cfm

Enclosure: 360 / 520 cfm

Mounting External

Housing Material Mild steel, powder coated

Dimension H x W x D 35 x 15.6 x 12 inch

Weight 104 lbs.

Voltage / Frequency 400/460 V - 50/60 Hz 2~

Nominal current 2.5 A

Starting current 11.3 A

Max. current 3.8 A

Nominal power 1.5 kW

Max. power 2.0 kW

Fuse 5 A (T)

Connection 5 pole terminal block for signals, 4 pole terminal block for

power

Ingress protection IP 56 / Type 12, 3, 3R, 4

Approvals CE, cURus, cULus

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7. Mounting

Always disconnect the power supply before opening the unit.

The heat load to be dissipated from enclosure should not exceed speciﬁc cooling output of the unit at any

condition. At cooling unit selection always cater for a safety margin of at least 15% extra cooling output in the

worst conditions. Air inlets and outlets must be completely free from obstruction.

Ensure that ﬂows of air leaving and entering the cooling unit, internal and external, are not obstructed. Cooling

unit enclosure air suction hole must be installed in the highest possible point. When installing the unit on a door

ensure it can take the weight.

Before drilling the enclosure ensure the ﬁxing elements and couplings will not interfere with the equipment

inside the enclosure itself. Disconnect power before starting any work inside the enclosure. Following this 1:1

Scale Drilling Template drill the holes and make the required cuts on the enclosure. This template may have

been aﬀected by storage conditions, please check this template by verifying values of the largest dimensions

before drilling. Fit the sealing strip on the cooling unit on the side connected to the enclosure and follow the

installation diagram.

This AC unit can only be mounted to a suitably Type rated enclosure to maintain it's Type rating. The Type and

IP rating of the enclosure should be the same or higher than that of the unit.

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8. Mounting Principle

Do not use within the ﬁrst 15 minutes after installation!

1 M6 bolts

2 M6 toothed washers

3 M6 Flat washers

4 Enclosure

5 Mounting gasket

6 Cooling unit

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