Honeywell PCR 100 Thermostat User Manual

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PCR-100

PCR-110

Installation and Operating

Instructions

Electronic thermostat

TABLE OF CONTENTS

1 Unpacking the unit and conditions of use

2 General instructions

3 Use and function

.1 Use for the purpose intended

.2 Function

4 Safety

.1 Sources of danger

.2 Safety precautions

5 Installation and commissioning

.1 Mechanical installation

.2 Electrical installation

6 Operation of the controller

.1 Switching on the operating voltage

.2 Display

.3 Key functions

.4 Adjusting the cold store temperature

.5 Manual defrost

7 Programming

.1 Input parameters and ranges

7.2 Sensor calibration (Parameter E 06)

18 Maintenance

9 Appendix

.1 Alarm messages

0 Conditions of warranty

11 Technical data

Unpacking the unit and conditions of use

Before and when unpacking the unit, make a visual inspection to

identify any possible damage which may have occurred during trans-

portation. Please look for loose parts, dents, scratches, etc.

Report any damage immediately to the freight company. (Please see

“

Conditions if damage has occurred”.) In other instances, the latest

edition of the “General conditions for the supply of goods and

services” issued by the ZVEI (German Central Association for the

Electrotechnical Industry) shall apply.

Before disposing of the packaging, please check it for loose functional

parts and information leaflets.

So that we can process warranty claims, please give an exact

description of the defect (with a photograph, if appropriate) and state

the model designation of the unit.

Please keep these operating instructions at the place where the

equipment is used.

General instructions

Work on the electrical devices and switching equipment may only be

carried out by appropriately qualified personnel. The relevant safety

and environmental regulations must be followed.

FLICA equipment is free from PCBs, PCTs, asbestos, formaldehyde,

cadmium and water-repelling substances.

The design of the equipment has taken into account the Standards

EN 50081-1,2 (emitted interference), EN 50082-1 (immunity to inter-

ference), EN 60335-1 (electrical safety), IEC 695-2-1 to -2-3

(

fire resistance, glow-wire test).

Safety tests have been performed in the factory on all equipment in

accordance with EN 60335-1 (DIN VDE 0700 T500).

Use and function

.1 Use for the purpose intended

This controller is designed to control ambient temperatures or

media temperatures in refrigeration or heating systems.

The controller must not be used as a safety cut-out device or excess

temperature limiter.

If the unit is used for purposes other than those stated here,

it shall not be considered to be use for the purpose intended.

Only connect sensors supplied with the unit. If a replacement

sensor is required, only use sensors of the same type

(

Part No. H61007 ).

The controller is not intended for use in vehicles because the possi-

ble operating voltage ranges, interference level and environmental

operating exceed the limits for which the controller can be used.

Please take the application limits into account

(

see Technical Data in section 11).

.2 Function

PCR-100 and PCR-110 are general-purpose thermostats, each with

a relay output and wide temperature control range

(

–55 °C to +50 °C).

The controllers have different housings:

PCR-100: Modular housing for 35 mm standard rails

PCR-110: “Snap-in” installation housing, which fits into aperture

8.5 x 70.5 mm.

Control performance: 2-step, on/off, with reversible direction for

heating and refrigerating.

Defrost option for chilling systems if continuous operation of the

evaporator fan is foreseen in the switching box.

Easy to operate thanks to digital input of setpoint value and

switching difference.

Data is not lost, even if there is a power failure, for at least

10 years.

Alarm output.

Safety

.1 Sources of danger

Caution - Mains voltage!

Never expose the unit to water or moisture. Risk of malfunction

and short circuit. Only use the unit when it is adjusted to normal

ambient temperature (+15 to. +30 °C). Extreme changes in tempe-

rature in combination with high atmospheric humidity may lead to

the formation of condensed water.

Even if the control circuit is switched off, high voltage may still be

applied to the controller. For this reason, isolate all electric

circuits before starting any service work.

Never expose the unit to excessive heat, dust and vibrations. Avoid

knocks and pressure loads. If the housing is damaged, there is a risk

of an electric shock causing death or injury.

If the unit cannot be operated without the risk of danger, it must

be taken out of service and precautions taken so that it cannot be

switched on again unintentionally.

This applies, in particular, if:

ൎ

the housing has damage which is visible,

the unit is no longer operational or

it has been stored for a long time in unfavourable conditions.

The unit must not be opened. If it is thought that the unit may be

defective, send it back to the dealer or manufacturer with a precise

description of the fault.

.2 Safety precautions

All electromagnetic loads (solenoid valves, contactors, horns,

motors) should be interference suppressed directly at the coil with

RC elements.

Please note the maximum contact rating of the relays and

terminals.

If this is not observed, there is a risk that the contacts may pit or

stick, with the result that the refrigeration system will not operate

correctly and the refrigerated items may be damaged.

Sensor leads are to be routed separately from mains voltage wires:

the clearance should be at least 5 cm.

Sensor leads must not be routed in multiple cables with other leads

carrying mains voltage, otherwise the system may malfunction.

Tighten the terminals carefully; excessive strain will result in

damage to the controller.

Installation and commissioning

.1 Mechanical installation

4 DIN Standard modular housings to be mounted on a

standarr rail:

a) housing with 2 mounting tabs:

Open out the side mounting tabs; clip the unit on to the 35 mm rail

and press tabs in again.

b) housings with 1 mounting tab:

Put housing on the upper 35 mm rail. Clip the unit on the 35 mm

rail, lower tab clips on the rail automatically.

To remove the unit from the rail press in lower mounting tab a

screw driver, lift unit.

Snap – in housings:

Fit the unit in an aperture 28,5 x 70,5 mm and secure it with the

relevant mounting frame.

a) housings with terminal box coverplate

(

max. wall thickness 22 mm)

b) housings without terminal box cover plate

max. wall thickness 18 mm)

(

for walls thicker than 10 mm: remove lateral plastic spacers from

the mounting frame. For the final fixing of the unit the side screws

have to be tightened carefully.

Use a cable clamp to secure sensor T1 in a suitable position.

.2 Electrical installation

☛

CAUTION: The mains voltage and system frequency must be the

same as the nominal values on the device’s rating plate.

Work on electrical systems must be performed by qualified

personnel. Relevant local safety regulations must be observed.

Wiring diagram:

☛

Instructions:

For PCR-110 the total current via terminal 5 of the common relay

connection must not exceed 10 A.

Pay attention to the contact loading of the relay (8A/5A resistive

load, 2A/1A inductive load). As a general rule, contactors are

recommended.

The maximum tested sensor cable length is 50 m, with a minimum

cross section of 2 x 0.75 mm2. Solder the extension cable to the

sensor cable to prevent contact resistances.

It is advisable to use shielded sensor extension cables. All shields

must be routed at the side of the controller to one earth/protec-

tive potential. The extension cable shield must not be connected on

the sensor side, otherwise bonding currents may occur via the

shielding.

The controllers are designed respecting the highest degree of

immunity to interference. If the local interference level exceeds the

immunity data might get lost (AL1 in display) and the controllers

switches to the preprogrammed setting values. This is not a

mulfunction of the controller. In such cases the means to suppress

interference have to be improved (RC-elements, shielded lines).

Operation of the controller

Front view of controller:

.1 Switching on the operating voltage

The controller is started by means of a control switch provided by the

customer.

The first time the controller is started, pre-programmed setting values

are used which at a later point can be adapted for individual require-

ments.

If alarm “AL 2” (temperature in refrigerated chamber too high

or too low) is displayed when the controller is switched on, this

can be cleared by pressing the

key.

.2 Display

During normal operation the current cold store temperature is

displayed. It is measured with cold store sensor T1.

In the event of an alarm, the most recent alarm message (e.g. AL1)

and the cold store temperature are displayed alternately.

Two spot indicators show the switching status of the relays during

operation:

Pos. 1: On :

Off:

Relay on.

Relay off.

Flashes: Start-up delay E03

active.

Pos. 3: On :

Defrost interval is active –

relay de-energized.

.3 Functions of keys

☛

Never operate the keys with sharp objects

screwdriver or similar).

(

Display of setpoint

value

Press and hold down

key.

Clear alarm

messages

Press key.

(If the sensor is faulty, switch

mains voltage ON/OFF).

Manual defrost

initiation

Press

key for 5 secs.

Display of time

until the next

defrost

Press

and keys in sequence

and hold both down.

(Display in hours and minutes).

Display limit value

for excess

Press

key.

temperature

(

cold store sensor T1)

Input values are always changed using the

the key held down.

Input parameters, e.g. the switching difference is shown as “E”

with a 2-digit number, e.g. “E 01”.

key with

Access to the programming level is by pressing the

and

key at the same time for 5 seconds.

The parameters to be changed can then be accessed by pressing

the and keys.

To exit from the programming level and save the data, press

the key after the last input parameter. If no key is pressed in the

programming level for 10 minutes, this mode will be exited

without the data being saved.

Do not display altered parameter data before saving the data, as it

would be reversed to its original value in the process.

.4 Setting the cold store temperature

Press and hold down the

in question using the

key. Adjust the setpoint on the value

key.

Adjustment is possible within the limits of the input parameters E01

and E02.

The factory setting is +4°C.

.5 Manual defrost

Press and hold down the

key for 5 seconds. The manual defrosting

process will be initiated by forcibly de-energizing the relay.

If parameter E09 is set to 0: no defrosting will be started.

Programming

Access to the programming level:

Press and hold down firmly the keys at the same time

for approx. 5 seconds. (E00 appears on display.)

Use or key to select parameters.

and

Setting: Press and hold down the

to the desired figure using the

key. Adjust the setpoint value

key.

Do not display altered parameter data before saving the data, as it

would be reversed to its original value in the process.

7.1 Input parameters and input ranges:

Parameter on display

Setting range

and or

(

)

(

)

Preset

E00 Cold store temperature difference 1 to 20 K

E01 Min. permissible

2 K

cold store temp.

–55 °C to E02

–55 °C

+50 °C

E02 Max. permissible

cold store temp.

E01 to +50 °C

E03 Delay time,

relay energizing

E04 Alarm temperature difference

0 to 15 mins.

–50 K to +50 K

5 mins.

20 K

If the set temperature difference E04 is negative, an alarm is given

if it is too cold in the refrigerated area,

e.g. E04 = –10 K, cold store setpoint value = 18°C

➝

alarm at –28 °C in refrigerated area.

If the set temperature difference E04 is positive, the alarm is given

if it is too warm in the refrigerated area,

e.g. E04 = +10 K, cold store setpoint value = –18°C

➝

alarm at –8°C in refrigerated area.

Attention: any change of coldstore set point value changes also the

alarm temperature.

If E04 is set to 0, no alarm will be given.

E05 Alarm delay time

E06 Sensor calibration T1

E07 Mode selection

0 to 99 mins.

–5 to +5 K

1 = Cooling,

10 mins.

0 K

= Heating

E08 Time between 2 defrost cycles

1 to 24 hours

8 hours

(

switch off cooling)

☛

Once the controller has been switched on, defrosting occurs

for the first time at the end of the first time interval.

After defrosting has been initiated manually, the next time

defrosting takes place is after a complete time interval has

elapsed.

☛

If the time interval between two defrost cycles is changed

when the system is in operation, the new time interval will

not be applied until after the next time defrosting has

occurred.

E09 Defrost time (0 = no defrosting)

E10 Max. display delay

0 to 99 mins.

25 mins.

15 mins.

after defrosting

☛

During the defrosting process, the last current tempe-

rature before defrosting started is retained in the dis-

play. After defrosting, the display returns to the instan-

taneous temperature when the stored value is reached

again or, at the latest, after time E10 has elapsed.

E11 Operating of relay

0 = Relay

de-energized

= Relay

if sensor T1 defective

permanently

energized

= On/off in

sequence,

according to

the times set

in E12 and

E13.

E12 “On” time at E11

E13 “Off” time at E11

1 to 99 mins.

15 mins.

Exiting programming mode:

Press the

key after the last level has been entered.

7.2 Sensor calibration (parameter E06)

The sensor can be calibrated.

Note on sensor calibration: Additional line resistance of 7 ⏲ in each

case, caused by sensor cable extension, results in a change in the

temperature display by +1K.

How to proceed: Measure the temperature with a calibrated

thermometer or submerge the sensor in well-mixed ice water (0 °C).

Compare the measured temperature with the temperature shown on

the unit display.

If the measured temperature is lower than the one displayed, set the

negative difference as the programming value (e.g. - 2 K).

If the measured temperature is higher than the one displayed, set the

positive difference as the programming value (e.g. 2K).

The temperature display is then corrected by the set value.

Maintenance

The controller does not require any maintenance. It does not have any

fuses so, if brief voltage spikes occur, the refrigeration system will not

stop operating for a prolonged period. Once the disturbance has pas-

sed, the controller will automatically start up again.

Cleaning the housing: Only a dry anti-static cloth may be used to wipe

clean all plastic parts. Do not use water or cleaning agents containing

solvents.

Appendix

.1 Alarm messages

If an alarm occurs, the alarm output will be activated and on the dis-

play a code will alternate with the cold store temperature.

Display

AL1

Meaning

Data lost from program memory.

The preset values will be used as an

emergency program.

The setpoint will be set to +4 °C.

AL2

AL3

AL4

AL5

Limit value (= specified value + E04) at sensor T1

exceeded and delay time E05 elapsed.

The sensor temperature is over 50 °C

or below –55°C.

The specified setpoint value is outside

the limits E01 and E02

Temperature sensor T1 – short circuit of break in wiring.

Compressor operates as a function of parameter E11

Clearing the alarm:

Press the key.

All alarm messages, with the exception of AL2, are also reset by

switching off the operating voltage. AL2 can only be reset using

the

key.

10 Conditions of warranty

Warranty is provided for a period of 24 months, starting at the

date the item was delivered. Proof of this should be furnished in

the form of a delivery note or invoice.

All functional faults caused by poor workmanship or faulty

materials will be repaired free of charge during the warranty

period.

More extensive claims, in particular for consequential damage, are

excluded.

Damage or malfunctioning caused by the equipment being hand-

led incorrectly or by non-compliance with the operating instruc-

tions shall not be covered by the warranty.

The warranty shall be invalidated if any work is carried out

on the appliance.

11 Technical data

Mains voltage/frequency:

Rated wattage:

Display:

230 V AC ± 10%, 50/60 Hz

2.1 watts

3-digit, 7-segment LED, red, 14.2 mm

1 K

Resolution:

Measuring range:

Outputs:

–55 to +50 °C

1 relay with changeover contact,

A, 230 V AC, resistive load

relay with N.O. contact,

A, 230 V AC, resistive load,

(

alarm)

Caution: For PCR-110 the total current via the common relay

connection, terminal no. 5, must not exceed 10 A.

Control performance:

Display accuracy:

Two-step

± 0.5 K internal, ±1 digit, at 25 °C

Operating conditions:

0 to 50 °C, 30 to 85 % R.H.,

excluding dew

Storage temperature:

Data back-up:

Sensor:

–20 to +80 °C

Non-volatile memory (EEPROM)

1 PTC

–

Sensor cable length:

Range where cable

2.5 m

–30 °C to +80 °C not fixed

–40 °C to +80 °C fixed

±2 %

can be used:

Sensor accuracy:

–

Housing:

PCR-100: L x W x H = 85 x 70 x 61 mm

PCR-110: L x W x H = 70 x 74 x 32 mm

ABS plastic, self-extinguishing

(

UL 94 V0)

Protective rating:

Terminals:

Housing: IP 20, Front panel: IP 52

Class of protection 2

10 A screw-type terminal strips,

with wire protection,

tightening torque 0.6 Nm

Max. core cross section 1.5 mm

Weight:

PCR-100: Approx. 330 g (inc. sensor).

PCR-110: Approx. 240 g (inc. sensor).

Only operate the unit in dry places.

Errors in the technical data are excepted. We reserve the right to make

changes without prior notice.

EC Declaration of Conformity

as defined in the

EMC Directive 89/336/EEC

and the

EC Low Voltage Directive 73/23/EEC

Product:

Model designation:

FLICA, Electronic thermostat

PRC-100, PCR-110

has been developed, designed and manufactured in accordance with the

EC Standards listed above.

The following harmonized Standards have been applied:

EN 50081-1 (1991)

Part 1 for the trades sector, emitted interference

EN 50081-2 (1993)

Part 1 for the industrial sector, emitted interference

EN 50082-1 (1991)

Part 1 for the trades sector, immunity to interference

EN 60335-1 (1993-03-09)

IEC 335-1 (1976) ed 2

Electrical safety, part 1: general requirements

EN 60730-1 (1992-12-09)

IEC 730-1 (1986) ed 1

Automatic electronic controls

Full technical documentation is available.

Operating instructions for the device are provided.

Mosbach, March 22 , 1999

Honeywell Flica

Honeywell AG

Hardhofweg

D-74821 Mosbach

i.V. Dr. Osthues

R & D / Production Manager

Automation and Control Solutions

Honeywell GmbH

Hardhofweg • 74821 Mosbach / Germany

Phone: +49 (0) 62 61 / 81-475

Manufactured for and on behalf of the

Environment and Combustion Controls

Division of Honeywell Technologies Sàrl,

Ecublens, Route du Bois 37, Switzerland

by its autorised representative Honeywell GmbH

Fax:

+49 (0) 62 61 / 81-461

E-Mail: Cooling.Mosbach@honeywell.com

www.honeywell-cooling.com

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