Honeywell PCR-310 User manual

PCR-310
PCR-410
with TR-310
Installation and
Operating Instructions
Electronic refrigeration control
with mains transformer
EB-PCR-05 EN1H-1923GE23 R1207

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TABLE OF CONTENTS
11 Unpacking the unit and conditions of use 3
12 General instructions 3
13 Use and function 3
3.1 Use for the purpose intended 3
3.2 Function 4
14 Safety 5
4.1 Sources of danger 5
4.2 Safety precautions 5
15 Installation and commissioning 6
5.1 Mechanical installation 6
5.2 Electrical installation 7
5.3 Setting the dip switch for the emergency setpoint 8
16 Operation 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 Manual defrosting 12
17 Programming 12
7.1 Input parameters and ranges 12
7.2 Sensor calibration (parameters E 15 and E 16) 14
18 Maintenance 15
19 Alarm messages 15
10 Problem solving 16
11 Conditions of warranty 16
12 Technical data 17

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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 in accordance with EN 60335-1 (DIN VDE 0700 T500) have
been performed in the factory on all equipment.
3 Use and function
3.1 Use for the purpose intended
IThis 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.

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IThe controller must not be used as a safety cut-out device or excess
temperature limiter.
IThe controller should preferably be connected to the mains
transformer supplied with the unit. Where the power supply is
provided by the customer, the permissible voltage ranges must be
adhered to.
IThe mains transformer supplied with the equipment is only to be
used with the PCR-310 and PCR-410 controller.
If the controller and/or transformer are used for purposes
other than those stated here, it shall not be considered to be
use for the purpose intended.
IOnly connect sensors supplied with the unit. If a replacement
sensor is required, only use sensors of the same type (part no.
H61007).
IThe 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.
IPlease take the application limits into account
(see Technical Data, Chapter 12).
3.2 Function
The PCR-310/-410 are microprocessor-controlled cold store controls for
refrigeration and deepfreeze systems with a “snap-in” installation
housing to fit in an aperture 28.5 x 70.5 mm and featuring:
ICompressor control (dependent upon cold store
temperature) with delayed start-up.
IEvaporator fan control
uFan either in combination with compressor or
uoperating continuously or
uswitched via the evaporator thermostat.
IDefrost control limited thermostatically, either for
electrical heating or hot-gas defrosting.
Defrosting is initiated via programmable intervals of time,
max. 24/day.
IOnly PCR-410 with alarm output with relay, closer contact.
A mains transformer supplied with the unit is provided as a power
supply.

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4 Safety
4.1 Sources of danger
ICaution - Mains voltage!
INever expose the unit or transformer 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.
IEven 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.
INever expose the unit or transformer 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.
IIf 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:
uThe housing has damage which is visible,
u the unit is no longer operational or
uit has been stored for a long time in unfavourable conditions.
IThe unit and transformer must not be opened. If the unit or
transformer is assumed defective, send it back to the dealer or
manufacturer with a precise description of the defect.
4.2 Safety precautions
IAll electromagnetic loads (solenoid valves, contactors, alarm 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.
ISensor leads are to be routed separately from mains voltage wires:
the clearance should be at least 5 cm.
ISensor leads must not be routed in multiple cables with other leads
carrying mains voltage, otherwise the system may malfunction.
ITighten the terminals carefully; excessive strain will result in
damage to the controller or transformer.

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5 Installation and commissioning
5.1 Mechanical installation
I“Snap-in” housing:
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 cover plate
(max. thickness 22 mm):
b) housings without terminal box cover plate
(max. wall thickness 18 mm):
For walls thicker than 10 mm: remove side plastic spacers from the
mounting frame.
For the final fixing at the unit side screws have to be tightened
carefully.
Sensor:
IUse a cable clamp to secure sensor T1 in a suitable position.
ISecure 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.
Mains transformer:
IFit onto back panel of electrics cabinet using the side mounting
holes and screws with a max. diameter of 3.5 mm.

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;
Mains transformer:
Terminal: Description:
1 – 2 230 V AC = Mains voltage supply, input
3 – 4 12 V AC = Low voltage, on terminal 8 – 9
of the controller.
☛Caution: It is preferable to connect the controller to the mains
transformer supplied.
If the power supply is provided by the customer, the permissible
voltage ranges are to be adhered to.
The voltage supply may be either smoothed direct voltage
(12 V DC +/- 10 %) (any polarity) or alternating voltage
(12 V AC +/- 10 % / 50 - 60 Hz).
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Controller
Connection: Description:
1 – 2 V = Compressor contactor (cooling)
1 – 4 (PCR-410) Alarm = Remote alarm, indicator lamp
or contactor
1 – 5 Ev = Evaporator fan (contactor)
8 – 9 12V AC/DC = Power supply
10 – 11 T1 = Cold store sensor
10 – 12 T2 = Evaporator sensor
☛Instructions:
IThe total current via terminal 1 of the common relay connection
must not exceed 10 A.
IPay attention to the contact loading of the relay
(8 A resistive load, 2A inductive load). As a general rule, contactors
are recommended.
IThe 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.
IIt is advisable to use shielded sensor extension cables.
All shields must be routed at the side of the controller to one
earth/protective potential. The extension cable shield must not be
connected on the sensor side, otherwise bonding currents may
occur via the shielding.
IThe 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).
5.3 Setting the DIP switch for the emergency setpoint
The DIP switch is at the side of the controller.

ISelection of the emergency setpoint value for the cold store
temperature:
This will be activated if the data in the memory is lost and if alarm
AL1 is activated. This sets all program parameters to the preset
value. The cold store temperature setpoint can be preset to +4 °C
or –18 °C, as desired. This ensures that chilling systems with
temperatures above zero do not freeze and deepfreeze
installations do not thaw.
DIP switch 1, Pos.: off: Setpoint value at +4 °C for emergency
operation. Advisable for chilled storage
(= Preset value).
DIP switch 1, Pos.: on: Setpoint value at –18 °C for emergency
operation. Advisable for deepfreezers.
6 Operation of the controller
Front view of controller:
6.1 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
requirements.
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.
6.2 Display
During normal operation the current cold store temperature is
displayed. It is measured with cold store sensor T1.
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In the event of an alarm, the most recent alarm message
(e.g. AL1) and the cold store temperature are displayed alternately.
Three spot indicators show the switching status of the relays during
operation:
Pos. 1: On : Compressor relay on.
Off: Compressor relay off.
Flashes: Compressor start-up
delay E05 active.
Pos. 2: On : Evaporator fan relay on.
Off: Evaporator fan relay off.
Pos. 3: On: Defrost relay on.
Off: Defrost realy off.
Flashes: Drain time E09 is running.
6.3 Key functions
☛Never operate the keys with sharp objects
(screwdriver or similar).
Display of setpoint Press and hold down key.
temperature:
Clear alarm Press key.
messages: (If the sonsor is faulty, switch mains
voltage ON/OFF).
Evaporator Press and keys in
temperature sequence and hold both down.
display:
Manual Press key for 5 seconds.
defrost initiation:
Display of time Press and keys in
until the next sequence and hold both down.
defrost: (Display in hours and minutes).
Display limit value Press key.
for excess
temperature alarm:
(cold store sensor T1)
IChange input values by using the and keys with the
key pressed down.
IInput parameters, e.g. the differential, are indicated by “E” and a
2-digit number, e.g. “E01”.