Honeywell PCR-300 User Manual

PCR-300

PCR-300 RC

Installation and Operating

Instructions

Electronic refrigeration control

EB-PCR-04 EN1H-1924GE23 R1207

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TABLE OF CONTENTS

11 Unpacking the unit and conditions of use

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12 General instructions 3
13 Use and function 3

3.1 Use for the purpose intended 3

3.2 Function 4

14 Safety 4

4.1 Sources of danger 4

4.2 Safety precautions 5

15 Installation and commissioning 5

5.1 Mechanical installation 5

5.2 Electrical installation 6

5.3 Setting the DIP switch for the emergency setpoint and
clock back-up battery 8

16 Operating of the controller 9

6.1 Switching on the operating voltage 9

6.2 Display 9

6.3 Key functions 10

6.4 Adjusting the cold store temperature 11

6.5 Changing the cold store temperature difference, defrost cycle,
and alarm temperature 11

6.6 Setting the time (PCR-300RC only) 11

6.7 Manual defrost 12

17 Programming 13

7.1 Input parameters and ranges 13

7.2 Sensor calibration (parameters E 15 and E 16) 15

18 Maintenance 16
19 Alarm messages 16

10 Problem solving 17
11 Conditions of warranty 17
12 Technical data 18

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1 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
transportation. 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 cases, 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.

2 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
interference), 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).

3 Use and Function

3.1 Use for the purpose intended

I This controller is designed to control ambient and media

temperatures in cold stores and refrigeration systems and to
control existing defrost equipment for one refrigeration circuit in
each case.

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

temperature limiter.

If the controller is used for purposes other than those stated
here, it shall not be considered to be use for the purpose
intended.

I Only connect sensors supplied with the unit. If a replacement sen-

sor is required, only use sensors of the same type (part no. H61007).

I The controller is not intended for use in vehicles because the

possible operating voltage ranges, interference level and
environmental operating conditions exceed the limits for which the
controller can be used.

I Please take the application limits into account

(see Technical Data, chapter 12).

3.2 Function

The PCR-300 is a microprocessor-controlled cold store control for
refrigeration and deepfreeze systems with a modular housing for
installation on 35 mm standard rails.

I Compressor control (dependent upon cold store

temperature) with delayed start-up.

I Evaporator fan control

u Fan either in combination with compressor or
u operating continuously or
u switched via the evaporator thermostat.

I Defrost control limited thermostatically,

either for electrical heating or hot-gas defrosting

I Alarm output.

Defrosting is initiated via programmable intervals of time, max. 24/day.
The PCR-300 RC is provided with a real-time clock with a

back-up battery for defrost control. A maximum of six times per day
can be programmed.

4 Safety

4.1 Sources of danger

I Caution - Mains voltage.
I 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
temperature in combination with high atmospheric humidity may
lead to the formation of condensed water.

I Even if the control-circuit voltage is switched off, high voltage may

still be applied to the unit. For this reason, isolate all electric

circuits before starting any service work.

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I 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.

I 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:

u The housing has damage which is visible,
u the unit is no longer operational or
u it has been stored for a long time in unfavourable conditions.

I 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.

4.2 Safety precautions

I All electromagnetic loads (solenoid valves, contactors, alarm horns,

motors) should be interference suppressed directly at the coil with
RC elements.

I 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.

I Sensor leads are to be routed separately from mains voltage wires.

The clearance should be at least 5 cm.

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

carrying mains voltage, otherwise the system may malfunction.

I Tighten the terminals carefully; excessive strain will result in

damage to the controller.

I PCR-300RC: Set DIP switch 2 to “off” if the controller is going to

be out of service for more than 3 months and when the controller
is shipped. This is to prevent damage occurring to the back-up
battery.

5 Installation and commissioning

5.1 Mechanical installation
I 4 Din standard modular housings to be mounted on a

standard rail:

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a) housing with 2 mounting tabs:

open out the lateral mounting tabs; clip the unit on 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 with a screw driver, lift
unit.

I Mounting of sensor:

I Use a cable clamp to secure sensor T1 in a suitable position.
I Secure evaporator sensor T2 in the evaporator fin core at the point

where it is suspected icing is the greatest. It is advisable to use a
point in the lower third of the finned evaporator.

5.2 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: