Howard McCray SR Series User manual

90-142 SR-Series 120215
READ THIS PAGE FIRST
1. Howard-McCray would like to thank you for purchasing one
of our units.
PLEASE READ THIS MANUAL CAREFULLY BEFORE
PROCEEDING WITH THE INSTALLATION OR OPERATING OF
THIS UNIT.
2. Environment - These display cabinets are made to operate at
75°F and 55% relative humidity. Temperature and/or humidity
greater than the factory recommendations will hinder the
performance of this cabinet.
3. Cabinet Set-Up – A qualified refrigeration mechanic should
set-up this cabinet. Control settings are extremely critical to
the proper operation of this unit. These settings are the
responsibility of the customer and are not covered by factory
warranties. Failure to have this unit installed by a qualified
refrigeration mechanic may VOID all the warranties on this
unit.
4. Location – This cabinet must not be located in the direct rays
of the sun or near radiant heat sources. A minimum of 3" of
free air space is required at the rear of the cabinet.
5. Never spray water into the cabinet. This will cause damage
to the seals.
6. If additional assistance is required, please call us at
1-800-344-8222.
READ THIS PAGE FIRST

90-142 SR-Series 120215
Installation and Operating
Instructions For
SR Series
SOLID DOOR REACH-IN
REFRIGERATOR
Important Instructions
Please Read carefully
Before attempting to
install or operate the cabinet
Keep this Book for
Future Reference

Howard-McCray A Division of HMC Enterprises, LLC.
831 East Cayuga Street •Philadelphia, PA 19124 USA •[phone] •[phone]
Fax [phone] •E-Mail: [email protected] 120215
1
Table of Contents
Engineering Specifications --------------------------------------------------------------------------------------------------------------- 2
Receiving and Inspection ------------------------------------------------------------------------------------------------------------------ 3
Installation --------------------------------------------------------------------------------------------------------------------------------------- 3
Electrical Service Connection------------------------------------------------------------------------------------------------------------ 3
Caster or Leg Installation ------------------------------------------------------------------------------------------------------------------ 3
Control Settings--------------------------------------------------------------------------------------------------------------------------------4
Stocking the Cabinet------------------------------------------------------------------------------------------------------------------------- 4
Defrost Period ---------------------------------------------------------------------------------------------------------------------------------- 4
Condensate Evaporator Pan -------------------------------------------------------------------------------------------------------------- 4
Drain Trap Installation----------------------------------------------------------------------------------------------------------------------- 4
Start-Up Check-List -------------------------------------------------------------------------------------------------------------------------- 4
Controller Start-Up --------------------------------------------------------------------------------------------------------------------------- 5
Alarm Program --------------------------------------------------------------------------------------------------------------------------------- 5
Maintenance Suggestions ----------------------------------------------------------------------------------------------------------------- 6
The Cleaning Process ----------------------------------------------------------------------------------------------------------------------- 6
Condenser Cleaning ------------------------------------------------------------------------------------------------------------------------- 6
Machine Compartment Cleaning -------------------------------------------------------------------------------------------------------- 6
Trouble Chart ----------------------------------------------------------------------------------------------------------------------------------- 7
Parts List ----------------------------------------------------------------------------------------------------------------------------------------- 8
Customer Installation Record ------------------------------------------------------------------------------------------------------------ 9
Notes -------------------------------------------------------------------------------------------------------------------------------------------- 10
Warranty------------------------------------------------------------------------------------------------------------------------------ Warranty
Dixell Manual (XR40CX) ----------------------------------------------------------------------------------------------------------- 1/4 – 4/4
Controller Set Point Chart (35F / 2C)--------------------------------------------------------------------------------------------- 1 of 1
Leg Installation Drawing--------------------------------------------------------------------------------------------------------- 1SH7789
Caster Installation Drawing ---------------------------------------------------------------------------------------------------- 1SH7790
Condensate Evaporator Pan Installation Drawing--------------------------------------------------------------------- 1SH7788
Cabinet Wiring Diagram ---------------------------------------------------------------------------------------- 1SH, 2SH, 3SH6514

Howard-McCray A Division of HMC Enterprises, LLC.
831 East Cayuga Street •Philadelphia, PA 19124 USA •[phone] •[phone]
Fax [phone] •E-Mail: [email protected] 120215
2
The following instructions are for the benefit of the new owner and the installing contractor.
They should be studied carefully before attempting to install or operate the cabinet.
This manual is the property of the owner and should remain in the owner’s possession.
Engineering Specifications – SR Models
Model No.
Cabinet Dimensions
D x H* x L
Compressor
HP Electrical Voltage Max. Amps
Power Cord
Plug (NEMA)
SR22 35 x 83 x 26 1/2 1/4 115/60Hz/1PH 6.8 5-15P
SR48 35 x 83 x 52 1/4 1/3 115/60Hz/1PH 9.6 5-15P
SR75 35 x 83 x 78 1/2 115/60Hz/1PH 12.1 5-20P
* - Includes 5" Casters
or
** = Top mounts does not includes 6" Legs
These cabinets are designed to operate in an air conditioned location ONLY.
Temperature not to exceed 75oF and a relative humidity not to exceed 55%.

Howard-McCray A Division of HMC Enterprises, LLC.
831 East Cayuga Street •Philadelphia, PA 19124 USA •[phone] •[phone]
Fax [phone] •E-Mail: [email protected] 120215
3
Receiving and Inspection Procedure
1) The cabinet has been carefully operation
tested and inspected before crating and has
been determined to be in good operating
condition before leaving the factory.
2) Upon arrival of the cabinet, the crate should
be inspected thoroughly for any damage that
may have occurred in transit. In the event that
any damage is discovered, it should be noted on
the delivery ticket or Bill of Lading and signed to
that effect. An immediate claim should then be
filed against the carrier giving them the
description and amount of damage.
3) After the crate has been removed, the cabinet
should be examined carefully for any damage. If
there is any concealed damage, the carrier
should be notified immediately. Make a request in
writing with the carrier for an inspection within
15 days, and retain all packaging. The carrier will
supply the inspection report and the required
claim forms.
4) Our Company can assume no responsibility for
filing freight claims as the cabinet was in good
condition on a clear Bill of Lading, F.O.B.
Philadelphia. However, the factory will assist, if
required.
5) Shortages - Check your shipment for any
possible shortages of material. If one exists and
is found to be responsibility of Howard-McCray,
notify the factory. Howard-McCray will
acknowledge shortages within ten days from
receipt of acknowledgement. If ashortage exists
and it involves the carrier, notify the carrier
immediately and request an inspection.
Installation
As with any refrigerated cabinet, there are
several very important requirements that must
be complied with for proper operation. They are
as follows:
1. This line of cabinets are designed to operate
in a location with an ambient temperatures of
75oF and a relative humidity of 55%. This cabinet
should not be located in an area the cabinet may
be subjected to radiant heat from spot or flood
lamps, sun rays or heat from suspended gas
heating fixtures.
2. After locating the cabinet, it must be leveled
from front to back as well as end-to-end. This will
facilitate proper refrigeration at the evaporator
and proper dissipation of the defrost water.
3. The minimum clearance allowed for the rear
of the cabinet is 3 inches and the sides can have
no clearance if need be.
4. All wiring must be installed by a competent
electrician and conform to local codes. The
incoming voltage must be maintained to within
5% of the voltage shown on the cabinet
nameplate.
Electrical Service Connection
Some of the models are provided with a Service
Power Cord, see the Engineering Specifications
for the plug type of your cabinet. Locate the
electrical outlet in such a manner that you may
plug in the service cord directly, without the use
of an extension cord. The electrical outlet used to
supply the cabinet must have proper ground
facilities to match the service plug on the cabinet
service cord. Make sure that no other electrically
operated devices are connected to the circuit
operating this cabinet, which will cause an
overload. Overloaded circuits are extremely
hazardous.
The electrical connection for models that are not
supplied with a Service Power Cord is to be
made in junction box located at the rear of the
cabinet (see applicable Plan View drawing for
exact location).
The incoming voltage must be maintained to
within 5% of the voltage shown on the nameplate.
Howard-McCray will not accept responsibility for
the performance of the cabinet or malfunction of
any component due to a incorrect voltage supply
than that indicated on the serial rating plate. Use
separate electrical supply lines connected to a
fuse block or circuit breaker of proper capacity.
Caster or Leg Installation
Most cabinets are supplied with a set of casters.
These casters are shipped as separate items and
will need to be installed before the cabinet is
located in position. See the Caster Installation
drawing for exact instructions.
Some cabinets are ordered and supplied with
adjustable legs. These legs and mounting plates
are shipped as separate items and will need to be
installed before the cabinet is located in position.
See the
Leg Installation drawing for exact
instructions.
NOTE When installing either Casters or Legs,
take all necessary safety precautions when
elevating the cabinet.

Howard-McCray A Division of HMC Enterprises, LLC.
831 East Cayuga Street •Philadelphia, PA 19124 USA •[phone] •[phone]
Fax [phone] •E-Mail: [email protected] 120215
4
Control Settings
Temperature Control-Electronic
The standard temperature control, when it leaves
is set to Cut-Out at 35ºF and Cut-In 39ºF, and can
be located in the machine compartment right
front behind the grille. This control may have to
be reset to satisfy the owner’s requirements or
local conditions. See attached controller manual.
The controller is located in the machine
compartment behind the front grille.
Stocking the Cabinet
After the equipment is running, it should be
operated for a sufficient length of time to bring
the storage temperature down to cycling of the
condensing unit. Three to four hours usually will
be enough to allow temperatures to drop.
The evaporator fans draw air up from the storage
area, circulate it through the evaporator and
discharge it down the rear wall of the cabinet. Be
certain that their good air circulation.
Defrost Period
One defrost periods per day. The defrost period
occurs 24 hours after start-up or can be reset by
forcing a manual defrost on the controller.
Pressing the defrost button on the controller for
2 seconds will manually start a defrost. Defrost is
set to terminate at 40ºF Evaporator Coil
Temperature.
Condensate Evaporator Pan
An electric condensate evaporator pan is
furnished with the cabinet, to dissipate the water
collected from the coil during defrost or off cycle.
The evaporator pan and it's mounting bracket
are shipped as a separate items. The evaporator
pan is equipped with a power cord for plugging
into a 115VAC NEMA 5-15R outlet. To install the
evaporator see the Condensate Pan Instruction
drawing for exact instructions.
Drain Trap Installation
A properly installed drain trap is extremely
important in ensuring satisfactory cabinet
operation, and protection from product loss. The
drain hose on this model is factory attached to
the rear of the cabinet. The drain hose is
supplied at a length sufficient to reach the floor,
when the cabinet is equipped with either casters
or legs. After installing the factory supplied
Electric Condensate Pan loosen the drain hose
attachment clamps that hold the drain hose in a
loop. Configure the drain hose on the rear of the
cabinet so that it is oriented vertically to the
condensate pan. Locate the factory supplied
drain trap so that it exits (in a vertical orientation)
into the Electric Condensate Pan. Determine
where the drain hose will overlap the drain trap
by a minimum of 2" and cut the hose to this
length. Insert the drain trap into the drain hose
and secure them to the rear of the cabinet.
NOTE Never route the drain hose directly into the
Electric Condensate Pan, the heat of the pan will
damage the drain hose.
CHECK-LIST FOR USE BEFORE START-UP
The following items should be checked, when
applicable to the cabinet:
Make sure that the door gaskets make a proper
seal to the cabinet.
Make sure that all fan motors are properly
plugged in.
Make sure that all fan blades are tight on all fan
motor shafts.
Make sure that the expansion valve sensing bulb
is properly positioned and is tightly secured.
Make sure that all flare nuts are tight.
Make sure that tubing entrance holes both inside
and outside the cabinet are properly sealed.
Make sure that all SEALANT MATERIAL that was
removed from position in the cabinet during
installation and piping is correctly replaced and
seals in a satisfactory manner.
Make sure that all the loose debris in the cabinet
is removed.

Howard-McCray A Division of HMC Enterprises, LLC.
831 East Cayuga Street •Philadelphia, PA 19124 USA •[phone] •[phone]
Fax [phone] •E-Mail: [email protected] 120215
5
Start-Up
1. Electrically energize the cabinet. Check the
supply voltage, must be within +/- 5%. Check the
evaporator fan motors to ensure all are operating
and rotating in the correct direction.
2. Electrically energize the refrigeration system.
Check the supply voltage, must be within +/- 5%.
3. Set and check the Temperature Control
settings (as outlined in the Temperature Control
section below).
4. Verify refrigeration system is operating
properly.
5. Verify proper Defrost operation (as outlined in
the Defrost section).
6. Set the Defrost Time clock to the correct time-
of-day (as outlined in the Defrost Time Clock
section).
7. Verify the proper setting of the Crankcase
Pressure Valve (as outlined in the Crankcase
Pressure Valve section).
Controller Start-Up
: To display target set point; in programming mode it selects a
parameter or confirm an operation.
(DEF) To start a manual defrost
(UP): To see the max. Stored temperature; in programming
mode it browses the parameter codes or increases the displayed
value.
(DOWN) To see the min stored temperature; in programming
mode it browses the parameter codes or decreases the
displayed value.
To switch the instrument off, if onF = oFF.
Not enabled.
KEY COMBINATIONS:
+  To lock & unlock the keyboard.
+To enter in programming mode.
+To return to the room temperature display.
The controller has been programmed to delay
the compressor and fan motors for one minute. It
will take approximately 30 minutes for the
compressor to cycle, in a 75ºF room. The cabinet
will cycle between 35ºF to 39ºF.
If the alarm should go off during the pull-down
period just press the SET button on the
controller.
Alarm Program
The alarm is programmed to sound if the
temperature should reach a high of 45ºF or a low
of 32ºF by pressing the SET button on the
controller this will restart the unit until it reaches
the programmed temperature.
Individual Controller Parameters:
Cabinet Internal Temperature
= Cut-In 39ºF,Cut-Out 35ºF
Anti-Short cycle Delay [AC]
= 1 Minute Delay
Defrost Termination Temp[dtE]
= 40ºF Evaporator Coil Temperature
Between Defrost Periods [idF]
= 24 Hours
Maximum Time in Defrost [MdF]
= 60 Minutes
Alarm High Limit [ALU]
= 45ºF
Alarm Low Limit [ALL]
= 32ºF
Alarm Delay
+10 Minutes after Limit been reached
See chart in this manual for additional parameter
settings.

Howard-McCray A Division of HMC Enterprises, LLC.
831 East Cayuga Street •Philadelphia, PA 19124 USA •[phone] •[phone]
Fax [phone] •E-Mail: [email protected] 120215
6
Maintenance Suggestions
An attractive operation can be a very profitable.
Dirty and poorly merchandised cabinets are
offensive to most discriminating customers, so a
clean attractive cabinet will pay dividends.
Weekly or more often, if necessary, the display
area should be cleaned and attractively stocked.
Important Notice
1. ALWAYS disconnect the power to the cabinet
before attempting to clean it with any liquid.
2. NEVER under any circumstances should a
water hose be sprayed into this cabinet.
3. NEVER use ammonia or solutions with
ammonia on this cabinet.
4. The use of abrasive cleaning materials on this
cabinet will VOID all cabinet warranties.
The Cleaning Process
1. Turn the power off from the source.
2. Remove all merchandise from the cabinet
and store in a refrigerated area. Then
remove all shelves and floor pans.
3. This cabinet can be hand cleaned internally
with a mild soap detergent and hot water.
Diluted non-chlorine bleach and hot water is
a good sanitizer. The cleaning cloth should
be just wet enough to get a reasonable
cleaning action but should not be wet to a
point where it will emit a large amount of
water which will flow through the drain
system causing it to overflow.
4. After the cabinet is cleaned, any remaining
water in the cabinet can be soaked up with
the use of a sponge and dried out with a dry
cloth completely before resuming
operations.
5. Make sure that the internal drain is open and
remove all scraps, paper, and lint.
6. All external panels may be cleaned with a
damp cloth, and then they may be polished
with a dry lint free cloth. This will preserve
the luster of the cabinet.
Cleaning the Condenser
It is crucial that the condenser face be cleaned
weekly. The condenser is prone to quickly
accumulate any dust or dirt from the location. A
dirty condenser will diminish the cooling ability of
the system, thus resulting in longer operational
times and warmer product temperatures.
The condenser face can be cleaned with the use
of a hose/brush attachment on a vacuum cleaner.
Take care to aviod bending the condenser fins, It
is of vital importance that the condenser gets the
proper amount of air through the fins and around
the tubes, therefore all dirt, lint, and dust needs
to be removed.
Cleaning the Machine Compartment
At intervals of four to six months, or before if
necessary, it is recommended that the Machine
Compartment be cleaned out. It should be
accomplished in the following order:
1. Shut down the cabinet electrically.
2. Remove the front grille. Using a hose/brush
attachment on a vacuum cleaner, all dirt, store
lint and dust can be removed from the machine
compartment.
3. If any traces of oil are found contact your
Refrigeration Service person as soon as
possible.
4. Before reloading the cabinet with
merchandise, allow an hour for refrigeration pull-
down. Make sure that all merchandise is in a
good salable and refrigerated condition when re-
loading the cabinet.

Howard-McCray A Division of HMC Enterprises, LLC.
831 East Cayuga Street •Philadelphia, PA 19124 USA •[phone] •[phone]
Fax [phone] •E-Mail: [email protected] 120215
7
Trouble Chart
A. Compressor will not start - no hum
Possible Causes:
1. Disconnect switch open
2. Blown fuse
3. Defective wiring
4. Overload protector tripped
5. Open control contacts (control may be
defective, or unit location may be too
cold)
6. Defective overload protector
B. Compressor will not start - hums but cycles on
overload
Possible Causes:
1. Low voltage
2. Unit wired incorrectly
3. Starting capacitor defective
4. Starting relay contact not closing
5. Compressor motor defective
6. High head pressure
7. Bearings on pistons tight - low oil charge
C. Compressor starts, but starting winding
remains in circuit
Possible Causes:
1. Low voltage
2. Unit wired incorrectly
3. Starting capacitor weak
4. Running capacitor defective
5. Starting relay defective
6. Compressor motor defective
7. High head pressure
D. Compressor starts and runs but cycles on
overload
Possible Causes:
1. Low voltage
2. Running capacitor defective
3. Overload protector defective
4. High head pressure
5. Fan motor, pump, etc., wired to wrong
side of overload protector
6. Compressor motor partially grounded
7. Unbalanced line voltage (3 phase models)
8. Bearing or pistons tight - low oil charge
E. Compressor short cycles
Possible Causes:
1. Control differential set too close
2. Refrigerant undercharge
3. Refrigerant overcharge
4. Discharge valve leaking
5. Expansion valve leaking
6. Cutting out on high pressure control
7. Cutting out on overload protector
because of tight bearings, stuck piston,
high head pressure or restricted air
cooled condenser
F. Compressor tries to start when thermostat
closes but cuts out on overload, starts after
several attempts
Possible Causes:
1. Low voltage
2. Thermostat differential too close (lower
than 10°)
3. Thermostat bulb not in tight contact with
evaporator
G. Running cycle too long, or unit operated
continuously
Possible Causes:
1. Insufficient refrigerant charge
2. Dirty or restricted condenser
3. Unit: location too hot
4. Control contacts stuck
5. Air or other non-condensable gases in
system
6. Expansion valve plugged or defective
7. Cabinet doors left open too long
8. Insufficient, defective or water - logged
insulation
9. Evaporator coil plugged with ice or dirt
H. Evaporator temperature too high
Possible Causes:
1. Shortage of refrigerant, or leak on system
2. Restricted capillary tube, strainer or drier
3. Control setting too high
4. Expansion valve restricted
5. Expansion valve too small
6. Evaporator coil plugged with ice or dirt
7. Evaporator oil logged
I. Noisy Unit
Possible Causes:
1. Compressor oil charge low
2. Fan blade bent causing vibration
3. Fan motor bearings loose or worn
4. Tube rattle
5. Loose parts on condensing unit
J. Liquid line hot
Possible Causes:
1. Unit undercharged or leak in system
2. Expansion valve opened too far
K. Liquid line frosted
Possible Causes:
1. Restriction in drier
2. Shut off valve on receiver either partially
closed or restricted
L. Suction line sweating or frosted
Possible Causes:
1. Expansion valve open too wide
2. Evaporator iced up
3. Evaporator fan motors not operating

Howard-McCray A Division of HMC Enterprises, LLC.
831 East Cayuga Street •Philadelphia, PA 19124 USA •[phone] •[phone]
Fax [phone] •E-Mail: [email protected] 120216
8
Parts List
Part # Description Usage
1SH6521 Evaporator Fan Assembly - 115V ALL Models
21-376 Digital Electric Controller – XR40CX ALL Models
20-206 Electric Condensate Evaporator Pan ALL Models
20-250 Anti-Sweat Heater ALL Models
20-199 Lamp Bulb ALL Models
30-489 Door Opening Breaker - 60-1/4" ALL Models
30-490 Door Opening Breaker - 21-3/4" ALL Models
30-493 Door Gasket ALL Models
40-102-C Wire Shelf SR22
40-103-C Wire Shelf - Ends SR48 & 75
40-104-C Wire Shelf - Centers SR75
70-088 Condensing Unit 1/4 hp SR22
70-089 Condensing Unit 1/3 hp SR48
70-091 Condensing Unit 1/2 hp SR75
80-148 Door Hinge All Models
NOTE: Additional parts not included in this list are available from the factory. Contact the Parts & Service
department at the phone numbers at the bottom of the page.

Howard-McCray A Division of HMC Enterprises, LLC.
831 East Cayuga Street •Philadelphia, PA 19124 USA •[phone] •[phone]
Fax [phone] •E-Mail: [email protected] 120216
9
Keep this Page for Your Records:
Dear Customer:
We wish to congratulate you on your judgment. We are very proud to have been privileged to
serve you with Howard-McCray equipment to fill your requirements.
Howard-McCray equipment is the product of a company dedicated in producing products of
quality, incorporating progressive features on a timely basis and backed by a warranty which
provides confidence.
Should you have any questions regarding features, operation, or service, call the Howard-
McCray Assistance Center toll free. (800-344-8222)
Thankyou,
Howard-McCray
Customer Installation Record:
Cabinet Model Number _____________________________________________________________________________________________
Serial Number _____________________________________________________________________________________________________
Condensing Unit Model Number and Horsepower ____________________________________________________________________
Type of Control ____________________________________________________________________________________________________
Refrigerant ________________________________________________________________________________________________________
Thermostat ________________________________________________________________________________________________________
Other _____________________________________________________________________________________________________________
____________________________________________________________________________________________________________________
____________________________________________________________________________________________________________________
Defrost Period _____________________________________________________________________________________________________
Date of Start-Up ___________________________________________________________________________________________________
Other Remarks ____________________________________________________________________________________________________
____________________________________________________________________________________________________________________
____________________________________________________________________________________________________________________
____________________________________________________________________________________________________________________
Installing Contractor _______________________________________________________________________________________________
____________________________________________________________________________________________________________________
Address ___________________________________________________________________________________________________________
____________________________________________________________________________________________________________________
____________________________________________________________________________________________________________________
____________________________________________________________________________________________________________________
Phone Number ____________________________________________________________________________________________________

Howard-McCray A Division of HMC Enterprises, LLC.
831 East Cayuga Street •Philadelphia, PA 19124 USA •[phone] •[phone]
Fax [phone] •E-Mail: [email protected] 120216
10
NOTES:
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Warranty
ONE YEAR WARRANTY
Howard-McCray warrants the refrigerator of the serial number shown, and all parts thereof, to be free from defects in material and workmanship under normal use and
service. Its obligation under the warranty shall be limited to repairing or replacing any part of said refrigerator (F.O.B Factory), which proves to be defective within one
year from the date of original shipment, provided that the installation date is not thirty (30) days beyond the original shipping date of the refrigerator and examination
discloses to its sole satisfaction that said refrigerator or any part thereof is defective. This warranty shall not apply to said refrigerator, or any part thereof, which has
been subject to any accident, alteration, abuse, misuse, or damage by flood, fire or acts of God, or repaired other than as authorized herein. This warranty does not apply
to glass or enameled finish. Labor costs are included in the warranty up to ninety (90) days from shipping date. More details are available in our price list.
All claims are to be handled through the selling dealer or distributor who originally bought the refrigerator from Howard-McCray. The selling dealer or distributor shall
be solely responsible for transacting with Howard-McCray for the part(s) replacement of any in or out of warranty part.
FOUR YEAR COMPRESSOR REPLACEMENT WARRANTY
FOR SELF CONTAINED REFRIGERATOR CABINETS OR REMOTE CABINETS PURCHASED WITH COMPRESSORS
This Four Year Replacement Warranty is a right of the buyer upon payment. It is the sole right and remedy of buyer after the expiration of the One Year Warranty on
the complete refrigerator. At any time during the four years following the expiration of the above One Year Warranty, if it is shown to the sole satisfaction of Howard-
McCray that the compressor is inoperative due to defects in factory workmanship or material under normal use and service. Howard-McCray agrees to replace the
compressor with a compressor or equipment of like or similar design and capacity.
All claimsmade pursuant to the Four Year Replacement Warranty are to be handled through the selling dealer or distributor who originally bought the refrigerator from
Howard-McCray. The selling dealer or distributor shall be solely responsible for transacting with Howard-McCray the replacement of any compressor. To expedite the
exchange of compressors under warranty, the dealer or distributor may make the exchange with a local compressor manufacturer’s wholesaler. If the inoperative
compressor is beyond the one (1) year warranty the selling dealer or distributor should send to Howard-McCray two (2) copies of the wholesaler’s invoice with all
warranty serial numbers, etc. and Howard-McCray will issue a credit to the dealer or distributor for the net exchange price, less the return allowance as listed by the
compressor manufacturer. The original compressor should be returned to the wholesaler, if a return allowance is applicable. If not applicable, the original compressor
serial plate should be returned to Howard-McCray,along with copies of the wholesaler’s invoice.
The Four Year Warranty does not apply to any part of the cabinet or its finish, nor does it apply to the control valve, relay or any part of the refrigeration system. This
Four Year Warranty shall not apply to said compressor if it has been subject to any accident, alteration, abuse, misuse, or damage by flood, fire or acts of God, or
repaired other than as authorized herein. Labor costs are not included in the Four Year Replacement Warranty.
THIS “ONE YEAR WARRANTY” AND “FOUR YEAR REPLACEMENT WARRANTY” ARE EXPRESSLY IN LIEU OF ANY AND ALL REPRESENTATIONS
AND WARRANTIES EXPRESSED OR IMPLIED. INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE WHETHER ARISING FROM STATUTE, COMMON LAW, CUSTOM, OR OTHERWISE. THE REMEDIES SET FORTH IN THE “ONE YEAR
WARRANTY” AND “FOUR YEAR REPLACEMENT WARRANTY” SHALL BE THE EXCLUSIVE REMEDIES AVAILABLE TO ANY PERSON. NO PERSON
HAS ANY AUTHORITY TO BIND HOWARD-McCRAY TO ANY REPRESENTATION, OBLIGATION OR WARRANTY OTHER THAN AS CONTAINED
HEREIN.
Howard-McCray shall not be liable for any special, indirect or consequential loss or damage resulting from the use of this refrigerator or caused by any defect, failure or
malfunction of any part thereof whether a claim for such damage is based upon warranty, contract, negligence, or otherwise. Neither the One Year Warranty nor the
Four Year Replacement Warranty shall be construed in such a manner as to place any cost, liability, expense or obligation of any nature whatsoever (including but not
limited to labor costs, freight or shipping expenses, lost profits damage to personal property and/or food or product spoilage costs) upon Howard-McCray other than the
obligation (as specified herein) to either repair or replace any part of the refrigerator pursuant to the One Year Warranty or to furnish a replacement compressor
pursuant to the Four Year Replacement Warranty.
The following, although not an exclusive list, are understood to be the responsibility of the owner and are not covered under either the One Year Warranty or Four Year
Replacement Warranty, since they are not attributable to defects in material or workmanship.
1. Installation of or repair with parts in a manner other than as provided herein.
2. Damage as the result of moving the refrigerator
3. Damage due to improper electric voltage or improper electric service.
The One Year Warranty and Four Year Replacement Warranty are valid only in the continental United States of America.
Welded Compressors
The compressor having exceeded the allowed time for exchange with the refrigeration wholesaler, but within the remainder of the five year coverage period, as
determined by the date of shipment of the cabinet from the factory; then the serial plate only would be removed and forwarded to our office with a copy of the
wholesaler’s invoice for the replacement compressor and the model and serial number of the cabinet upon which the replacement compressor was installed. The selling
dealer’s name, copy of the invoice if available, and the date of installation at the customer’s location will also be required.
Semi-Hermetic Compressors:
Same as the welded compressor, except that the proved inoperative compressor would be returned to the authorized refrigeration wholesalerfor salvage credit, which
would be applied toward the purchase of the replacement compressor. The forwarding of the invoice along with the model and serial number of the cabinet with the
selling dealer’s name would allow processing of the claim.
IMPORTANT NOTICE: Replacement of parts covered by this warranty is subject to government restriction on materials and availability from the manufacturer of such
parts. Bodily harm to any person while operating Howard-McCray equipment or harm to personal property is not the responsibility of Howard-McCray.
_______________________________________
831 East Cayuga Street ·Philadelphia, PA 19124USA
[phone] · 1-800-344-8222· FAX[phone]
E-Mail: [email protected] · Web Site: www.howardmccray.com

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1592020042 XR40CX GB ES m&M r1.1 05.03.2007.doc XR40C 1/4
Digital controller with defrost management
XR40CX
CONTENTS
1. GENERAL WARNING ________________________________________________________1
2. GENERAL DESCRIPTION ____________________________________________________1
3. CONTROLLING LOADS ______________________________________________________1
4. FRONT PANEL COMMANDS __________________________________________________1
5. MAX & MIN TEMPERATURE MEMORIZATION____________________________________1
6. MAIN FUNCTIONS __________________________________________________________1
7. PARAMETERS _____________________________________________________________2
8. DIGITAL INPUT (ENABLED WITH P3P = N) ______________________________________3
9. TTL SERIAL LINE – FOR MONITORING SYSTEMS ________________________________3
10. X-REP OUTPUT – OPTIONAL _________________________________________________3
11. INSTALLATION AND MOUNTING ______________________________________________3
12. ELECTRICAL CONNECTIONS_________________________________________________3
13. HOW TO USE THE HOT KEY__________________________________________________3
14. ALARM SIGNALS ___________________________________________________________3
15. TECHNICAL DATA __________________________________________________________3
16. CONNECTIONS_____________________________________________________________4
17. DEFAULT SETTING VALUES__________________________________________________4
1. GENERAL WARNING
1.1 PLEASE READ BEFORE USING THIS MANUAL
•This manual is part of the product and should be kept near the instrument for easy and quick
reference.
•The instrument shall not be used for purposes different from those described hereunder. It
cannot be used as a safety device.
•Check the application limits before proceeding.
1.2 SAFETY PRECAUTIONS
•Check the supply voltage is correct before connecting the instrument.
•Do not expose to water or moisture: use the controller only within the operating limits avoiding
sudden temperature changes with high atmospheric humidity to prevent formation of
condensation
•Warning: disconnect all electrical connections beforeany kind of maintenance.
•Fit the probe where it is not accessible by the End User. The instrument must not be opened.
•In case of failure or faulty operation send the instrument back to the distributor or to “Dixell
S.p.A.” (see address) with a detailed description of the fault.
•Consider the maximum current which can be applied to each relay (see Technical Data).
•Ensure that the wires for probes, loads and the power supply are separated and far enough
from each other, without crossing or intertwining.
•In case of applications in industrial environments, the use of mains filters (our mod. FT1) in
parallel with inductive loads could be useful.
2. GENERAL DESCRIPTION
Model XR40CX, format 32 x 74 mm, is microprocessor based controller, suitable for applications on
medium or low temperature refrigerating units. It has 2 relay outputs to control compressor and
defrost, which can be either electrical or reverse cycle (hot gas). It is also provided with three NTC or
PTC probe inputs, the first one for temperature control, the second one, to be located onto the
evaporator, to control the defrost termination temperature, the third one, optional, to connect to the
HOT KEY terminals to signal the condenser temperature alarm or to display a temperature. The
digital input can operate as fourth temperature probe.
The HOT KEY output allows to connect the unit, by means of the external module XJ485-CX, to a
network line ModBUS-RTU compatible such as the monitoring units of X-WEB family. It
allows to program the controller by means the HOT KEY programming keyboard.
The instrument is fully configurable through special parameters that can be easily programmed
through the keyboard.
3. CONTROLLING LOADS
3.1 COMPRESSOR
The regulation is performed according
to the temperature measured by the
thermostat probe with a positive
differential from the set point: if the
temperature increases and reaches set
point plus differential the compressor is
started and then turned off when the
temperature reaches the set point value
again.
Time
Temper.
Compr.
SET
ON
In case of fault in the thermostat probe the start and stop of the compressor are timed through
parameters “COn” and “COF”.
3.2 DEFROST
Two defrost modes are available through the “tdF” parameter: defrost through electrical heater (tdF
= EL) and hot gas defrost (tdF = in). Other parameters are used to control the interval between
defrost cycles (IdF), its maximum length (MdF) and two defrost modes: timed or controlled by the
evaporator’s probe (P2P).
At the end of defrost dripping time is started, its length is set in the FSt parameter. With FSt =0 the
dripping time is disabled.
4. FRONT PANEL COMMANDS
: To display target set point; in programming mode it selects a parameter or confirm an
operation.
(DEF) To start a manual defrost
(UP): To see the max. stored temperature; in programming mode it browses the parameter
codes or increases the displayed value.
(DOWN) To see the min stored temperature; in programming mode it browses the parameter
codes or decreases the displayed value.
To activate / deactivate the energy saving cycle.
Not enabled.
KEY COMBINATIONS:
+  To lock & unlock the keyboard.
+To enter in programming mode.
+To return to the room temperature display.
4.1 USE OF LEDS
Each LED function is described in the following table.
LED MODE FUNCTION
ON Compressor enabled
Flashing Anti-short cycle delay enabled
ON Defrost enabled
Flashing Drip time in progress
ON An alarm is occurring
ON Continuous cycle is running
ON Energy saving enbled
°C/°F ON Measurement unit
°C/°F Flashing Programming phase
5. MAX & MIN TEMPERATURE MEMORIZATION
5.1 HOW TO SEE THE MIN TEMPERATURE
1. Press and release the 8key.
2. The “Lo” message will be displayed followed by the minimum temperature recorded.
3. By pressing the 8key again or by waiting 5s the normal display will be restored.
5.2 HOW TO SEE THE MAX TEMPERATURE
1. Press and release the 9key.
2. The “Hi” message will be displayed followed by the maximum temperature recorded.
3. By pressing the 9key again or by waiting 5s the normal display will be restored.
5.3 HOW TO RESET THE MAX AND MIN TEMPERATURE RECORDED
1. Hold press the SET key for more than 3s, while the max. or min temperature is displayed. (rSt
message will be displayed)
2. To confirm the operation the “rSt” message starts blinking and the normal temperature will be
displayed.
6. MAIN FUNCTIONS
6.1 HOW TO SEE THE SETPOINT
1. Push and immediately release the SET key: the display will show the
Set point value;
2. Push and immediately release the SET key or wait for 5 seconds to
display the probe value again.
6.2 HOW TO CHANGE THE SETPOINT
1. Push the SET key for more than 2 seconds to change the Set point value;
2. The value of the set point will be displayed and the “°C” or “°F” LED starts blinking;
3. To change the Set value push the 9or 8arrows within 10s.
4. To memorise the new set point value push the SET key again or wait 10s.
6.3 HOW TO START A MANUAL DEFROST
Push the DEF key for more than 2 seconds and a manual defrost will start.

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6.4 HOW TO CHANGE A PARAMETER VALUE
To change the parameter’s value operate as follows:
1. Enter the Programming mode by pressing the Set + 8keys for 3s (the “°C” or “°F” LED starts
blinking).
2. Select the required parameter. Press the “SET” key to display its value
3. Use “UP” or “DOWN” to change its value.
4. Press “SET” to store the new value and move to the following parameter.
To exit: Press SET + UP or wait 15s without pressing a key.
NOTE: the set value is stored even when the procedure is exited by waiting the time-out to expire.
6.5 THE HIDDEN MENU
The hidden menu Includes all the parameters of the instrument.
6.5.1 HOW TO ENTER THE HIDDEN MENU
1. Enter the Programming mode by pressing the Set + 8keys for 3s (the “°C” or “°F” LED starts
blinking).
2. Released the keys, then push again the Set+8keys for more than 7s. The Pr2 label will be
displayed immediately followed from the HY parameter.
NOW YOU ARE IN THE HIDDEN MENU.
3. Select the required parameter.
4. Press the “SET” key to display its value
5. Use 9or 8to change its value.
6. Press “SET” to store the new value and move to the following parameter.
To exit: Press SET + 9or wait 15s without pressing a key.
NOTE1: if none parameter is present in Pr1, after 3s the “noP” message is displayed. Keep the keys
pushed till the Pr2 message is displayed.
NOTE2: the set value is stored even when the procedure is exited by waiting the time-out to expire.
6.5.2 HOW TO MOVE A PARAMETER FROM THE HIDDEN MENU TO THE
FIRST LEVEL AND VICEVERSA.
Each parameter present in the HIDDEN MENU can be removed or put into “THE FIRST LEVEL”
(user level) by pressing “SET + 8”.
In HIDDEN MENU when a parameter is present in First Level the decimal point is on.
6.6 HOW TO LOCK THE KEYBOARD
1. Keep pressed for more than 3 s the UP + DOWN keys.
2. The “POF” message will be displayed and the keyboard will be locked. At this point it will be
possible only to see the set point or the MAX o Min temperature stored
3. If a key is pressed more than 3s the “POF” message will be displayed.
6.7 TO UNLOCK THE KEYBOARD
Keep pressed together for more than 3s the 9and 8keys, till the “Pon” message will be
displayed.
6.8 THE CONTINUOUS CYCLE
When defrost is not in progress, it can be activated by holding the “9” key pressed for about 3
seconds. The compressor operates to maintain the “ccS” set point for the time set through the “CCt”
parameter. The cycle can be terminated before the end of the set time using the same activation key
“9” for 3 seconds.
6.9 THE ENERGY SAVING FUNCTION
With “onF = ES”, pushing the key, energy saving cycle is enabled: this function
allows to change the set point value as the result of the SET+ HES
To stop the energy saving push againthe key.
7. PARAMETERS
REGULATION
Hy Differential: (0,1 ÷ 25,5°C / 1÷255 °F) Intervention differential for set point. Compressor Cut IN
is Set Point + differential (Hy). Compressor Cut OUT is when the temperature reaches the set
point.
LS Minimum set point: (- 50°C÷SET/-58°F÷SET): Sets the minimum value for the set point.
US Maximum set point: (SET÷110°C/ SET÷230°F). Set the maximum value for set point.
Ot Thermostat probe calibration: (-12.0÷12.0°C; -120÷120°F) allows to adjust possible offset of
the thermostat probe.
P2P Evaporator probe presence: n= not present: the defrost stops by time; y= present: the defrost
stops by temperature.
OE Evaporator probe calibration: (-12.0÷12.0°C; -120÷120°F). allows to adjust possible offset of
the evaporator probe.
P3P Third probe presence (P3): n= not present:, the terminal operates as digital input.; y=
present:, the terminal operates as third probe.
O3 Third probe calibration (P3): (-12.0÷12.0°C; -120÷120°F). allows to adjust possible offset of
the third probe.
P4P Fourth probe presence: (n = Not present; y = present).
o4 Fourth probe calibration: (-12.0÷12.0°C) allows to adjust possible offset of the fourth probe.
OdS Outputs activation delay at start up: (0÷255min) This function is enabled at the initial start up
of the instrument and inhibits any output activation for the period of time set in the parameter.
AC Anti-short cycle delay: (0÷50 min) minimum interval between the compressor stop and the
following restart.
rtr Percentage of the second and first probe for regulation (0÷100; 100 = P1, 0 = P2 ): it
allows to set the regulation according to the percentage of the first and second probe, as for the
following formula (rtr(P1-P2)/100 + P2).
CCt Compressor ON time during continuous cycle: (0.0÷24.0h; res. 10min) Allows to set the
length of the continuous cycle: compressor stays on without interruption for the CCt time. Can be
used, for instance, when the room is filledwith new products.
CCS Set point for continuous cycle: (-50÷150°C) it sets the set point used during the continuous
cycle.
COn Compressor ON time with faulty probe: (0÷255 min) time during which the compressor is
active in case of faulty thermostat probe. With COn=0 compressor is always OFF.
COF Compressor OFF time with faulty probe: (0÷255 min) time during which the compressor is
OFF in case of faulty thermostat probe. With COF=0 compressor is always active.
DISPLAY
CF Temperature measurement unit: °C=Celsius; °F=Fahrenheit. WARNING: When the
measurement unit is changed the SET point and the values of the parameters Hy, LS, US, Ot,
ALU and ALL have to be checked and modified if necessary).
rES Resolution (for °C): (in = 1°C; dE = 0.1 °C) allows decimal point display.
Lod Instrument display: (P1; P2, P3, P4, SET, dtr): it selects which probe is displayed by the
instrument: P1 = Thermostat probe; P2 = Evaporator probe; P3 = Third probe(only for model
with this option enabled); P4 = Fourth probe, SET = set point; dtr = percentage of
visualization.
rEd X- REP display (optional): (P1; P2, P3, P4, SET, dtr): it selects which probe is displayed by
X- REP: P1 = Thermostat probe; P2 = Evaporator probe; P3 = Third probe(only for model with
this option enabled); P4 = Fourth probe, SET = set point; dtr = percentage of visualization.
dLy Display delay: (0 ÷20.0m; risul. 10s) when the temperature increases, the display is updated
of 1 °C/1°F afterthis time.
dtr Percentage of the second and first probe for visualization when Lod = dtr (0÷100; 100 =
P1, 0 = P2 ): if Lod = dtr it allows to set the visualization according to the percentage of the
first and second probe, as for the following formula (dtr(P1-P2)/100 + P2).
DEFROST
dFP Probe selection for defrost termination: nP = no probe; P1 =thermostat probe; P2 =
evaporator probe; P3 =configurable probe; P4 = Probe on Hot Key plug.
tdF Defrost type: EL = electrical heater; in = hot gas
dtE Defrost termination temperature: (-50÷50 °C/
-58÷122°F) (Enabled only when EdF=Pb) sets the temperature measured by the evaporator
probe, which causes the end of defrost.
IdF Interval between defrost cycles: (0÷120h) Determines the time interval between the
beginning of two defrost cycles.
MdF (Maximum) length for defrost: (0÷255min) When P2P = n, (not evaporator probe: timed
defrost) it sets the defrost duration, when P2P = y (defrost end based on temperature) it sets
the maximum length for defrost.
dSd Start defrost delay: ( 0÷99min) This is useful when different defrost start times are necessary
to avoid overloading the plant.
dFd Temperature displayed during defrost: (rt = real temperature; it = temperature at defrost
start; SEt = set point; dEF = “dEF” label)
dAd MAX display delay after defrost: (0÷255min). Sets the maximum time between the end of
defrost and the restarting of the real room temperature display.
Fdt Drip time: (0÷120 min) time interval between reaching defrost termination temperature and the
restoring of the control’s normal operation. This time allows the evaporator to eliminate water
drops that might have formed due to defrost.
dPo First defrost after start-up: (y = immediately; n = after the IdF time)
dAF Defrost delay after continuous cycle: (0÷23.5h) time interval between the end of the fast
freezing cycle and the followingdefrost related to it.
ALARMS
ALC Temperature alarms configuration: (Ab; rE)
Ab= absolute temperature: alarm temperature is given by the ALL or ALU values. rE =
temperature alarms are referred to the set point. Temperature alarm is enabled when the
temperature exceeds the “SET+ALU” or “SET-ALL” values.
ALU MAXIMUM temperature alarm: (SET÷110°C; SET÷230°F) when this temperature is reached
the alarm is enabled, after the “ALd” delay time.
ALL Minimum temperature alarm: (-50.0 ÷ SET°C; -58÷230°F when this temperature is reached
the alarm is enabled, after the “ALd” delay time.
AFH Differential for temperature alarm recovery: (0,1÷25,5°C; 1÷45°F) Intervention differential
for recovery of temperature alarm.
ALd Temperature alarm delay: (0÷255 min) time interval between the detection of an alarm
condition and alarm signalling.
dAO Exclusion of temperature alarm at startup: (from 0.0 min to 23.5h) time interval between the
detection of the temperature alarm condition after instrument power on and alarm signalling.
CONDENSER TEMPERATURE ALARM (detected by the fourth probe)
AP2 Probe selection for temperature alarm of condenser: nP = no probe; P1 =thermostat probe;
P2 = evaporator probe; P3 =configurable probe; P4 = Probe on Hot Key plug.
AL2 Low temperature alarm of condenser:(-55÷150°C) when this temperature is reached the
LA2 alarm is signalled, possibly after the Ad2 delay.
Au2 High temperature alarm of condenser:(-55÷150°C) when this temperature is reached the
HA2 alarm is signalled, possibly after the Ad2 delay.
AH2 Differential for temperature condenser alarm recovery:(0,1÷25,5°C; 1÷45°F)
Ad2 Condenser temperature alarm delay: (0÷255 min) time interval between the detection of the
condenser alarm condition and alarm signalling.
dA2 Condenser temperature alarm exclusion at start up: (from 0.0 min to 23.5h, res. 10min)
bLL Compressor off with low temperature alarm of condenser:n = no: compressor keeps on
working; Y = yes, compressor is switched off till the alarm is present, in any case regulation
restarts after AC time at minimum.
AC2 Compressor off with high temperature alarm of condenser:n = no: compressor keeps on
working; Y = yes, compressor is switched off till the alarm is present, in any case regulation
restarts after AC time at minimum.
DIGITAL INPUT
i1P Digital input polarity: oP: the digital input is activated by opening the contact; CL: the digital
input is activated by closing the contact.
i1F Digital input configuration: EAL = external alarm: “EA” message is displayed; bAL = serious
alarm “CA” message is displayed. PAL = pressure switch alarm, “CA” message is displayed;
dor = door switch function; dEF = activation of a defrost cycle; AUS =not enabled; Htr = kind of
action inversion (cooling – heating); FAn = not set it; ES = Energy saving.
did:(0÷255 min) with i1F= EAL or i1F = bAL digital input alarm delay: delay between the
detection of the external alarm condition and its signalling.
with i1F= dor: door open signalling delay
with i1F = PAL: time for pressure switch function: time interval to calculate the number of
the pressure switch activation.
nPS Pressure switch number: (0 ÷15) Number of activation of the pressure switch, during the “did”
interval, before signalling the alarm event (I2F= PAL).
If the nPS activation in the did time is reached, switch off and on the instrument to
restart normal regulation.
odc Compressor status when open door: no; Fan = normal; CPr; F_C = Compressor OFF.
rrd Outputs restart after doA alarm: no = outputs not affected by the doA alarm; yES = outputs
restart with the doA alarm;

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HES Temperature increase during the Energy Saving cycle : (-30,0°C÷30,0°C/-22÷86°F) it sets
the increasing value of the set point during the Energy Saving cycle.
OTHER
Adr Serial address (1÷244): Identifies the instrument address when connected to a ModBUS
compatible monitoring system.
PbC Type of probe: it allows to set the kind of probe used by the instrument: PbC = PBC probe, ntc
= NTC probe.
onF Enrgy saving key enabling: nu = disabled; oFF = not set it; ES = enabled.
dP1 Thermostat probe display
dP2 Evaporator probe display
dP3 Third probe display- optional.
dP4 Fourth probe display.
rSE Real set point: (readable only), it shows the set point used during the energy saving cycle or
during the continuous cycle.
rEL Software release for internal use.
Ptb Parameter table code: readable only.
8. DIGITAL INPUT (ENABLED WITH P3P = N)
The free voltage digital input is programmable in different configurations by the “i1F” parameter.
8.1 DOOR SWITCH INPUT (i1F = dor)
It signals the door status and the corresponding relay output status through the “odc” parameter: no,
Fan = normal (any change); CPr, F_C = Compressor OFF.
Since the door is opened, after the delay time set through parameter “did”, the door alarm is
enabled, the display shows the message “dA” and the regulation restarts is rtr = yES. The alarm
stops as soon as the external digital input is disabled again. With the door open, the high and low
temperature alarms are disabled.
8.2 GENERIC ALARM (i1F = EAL)
As soon as the digital input is activated the unit will wait for “did” time delay before signalling the
“EAL” alarm message. The outputs status don’t change. The alarm stops just after the digital input is
de-activated.
8.3 SERIOUS ALARM MODE (i1F = bAL)
When the digital input is activated, the unit will wait for “did” delay before signalling the “CA” alarm
message. The relay outputs are switched OFF. The alarm will stop as soon as the digital input is de-
activated.
8.4 PRESSURE SWITCH (i1F = PAL)
If during the interval time set by “did” parameter, the pressure switch has reached the number of
activation of the “nPS” parameter, the “CA” pressure alarm message will be displayed. The
compressor and the regulation are stopped. When the digital input is ON the compressor is always
OFF.
If the nPS activation in the did time is reached, switch off and on the instrument to restart
normal regulation.
8.5 START DEFROST (i1F = dFr)
It starts a defrost if there are the right conditions. After the defrost is finished, the normal regulation
will restart only if the digital input is disabled otherwise the instrument will wait until the “MdF” safety
time is expired.
8.6 INVERSION OF THE KIND OF ACTION: HEATING-COOLING (i1F = Htr)
This function allows to invert the regulation of the controller: from cooling to heating and viceversa.
8.7 ENERGY SAVING (i1F = ES)
The Energy Saving function allows to change the set point value as the result of the SET+ HES
(parameter) sum. This function is enabled until the digital input is activated.
8.8 DIGITAL INPUTS POLARITY
The digital input polarity depends on the “i1P” parameter.
i1P=CL: the input is activated by closing the contact.
i1P=OP: the input is activated by opening the contact
9. TTL SERIAL LINE – FOR MONITORING SYSTEMS
The TTL serial line, available through the HOT KEY connector, allows by means of the external
TTL/RS485 converter, XJ485-CX, to connect the instrument to a monitoring system ModBUS-RTU
compatible such as the X-WEB500/3000/300.
10. X-REP OUTPUT – OPTIONAL
As optional, an X-REP can be connected to the instrument, trough the HOY KEY
connector. The X-REP output EXCLUDES the serial connection.
To connect the X-REP to the
instrument the following connectors
must be used CAB-51F(1m), CAB-
52F(2m), CAB-55F(5m),
11. INSTALLATION AND MOUNTING
Instrument XR40CX shall be mounted on vertical panel, in a
29x71 mm hole, and fixed using the special bracket supplied.
The temperature range allowed for correct operation is 0÷60 °C.
Avoid places subject to strong vibrations, corrosive gases,
excessive dirt or humidity. The same recommendations apply to
probes. Let air circulate by the cooling holes.
12. ELECTRICAL CONNECTIONS
The instrument is provided with screw terminal block to connect cables with a cross section up to 2,5
mm2. Before connecting cables make sure the power supply complies with the instrument’s
requirements. Separate the probe cables from the power supply cables, from the outputs and the
power connections. Do not exceed the maximum current allowed on each relay, in case of heavier
loads use a suitable external relay.
12.1 PROBE CONNECTION
The probes shall be mounted with the bulb upwards to prevent damages due to casual liquid
infiltration. It is recommended to place the thermostat probe away from air streams to correctly
measure the average room temperature. Place the defrost termination probe among the evaporator
fins in the coldest place, where most ice is formed, far from heaters or from the warmest place during
defrost, to prevent premature defrost termination.
13. HOW TO USE THE HOT KEY
13.1 HOW TO PROGRAM A HOT KEY FROM THE INSTRUMENT (UPLOAD)
1. Program one controller with the front keypad.
2. When the controller is ON, insert the “Hot key” and push 9key; the "uPL" message
appears followed a by flashing “End”
3. Push “SET” key and the End will stop flashing.
4. Turn OFF the instrument remove the “Hot Key”, then turn it ON again.
NOTE: the “Err” message is displayed for failed programming. In this case push again 9key if you
want to restart the upload again or remove the “Hot key” to abort the operation.
13.2 HOW TO PROGRAM AN INSTRUMENT USING A HOT KEY
(DOWNLOAD)
1. Turn OFF the instrument.
2. Insert a programmed “Hot Key” into the 5 PIN receptacle and then turn the Controller ON.
3. Automatically the parameter list of the “Hot Key” is downloaded into the Controller memory,
the “doL” message is blinking followed a by flashing “End”.
4. After 10 seconds the instrument will restart working with the new parameters.
5. Remove the “Hot Key”..
NOTE the message “Err” is displayed for failed programming. In this case turn the unit off and then
on if you want to restart the download again or remove the “Hot key” to abort the operation.
14. ALARM SIGNALS
Message Cause Outputs
“P1” Room probe failure Compressor output acc. to par. “Con” and
“COF”
“P2” Evaporator probe failure Defrost end is timed
“P3” Third probe failure Outputs unchanged
“P4” Fourth probe failure Outputs unchanged
“HA” Maximum temperature alarm Outputs unchanged.
“LA” Minimum temperature alarm Outputs unchanged.
"HA2" Condenser high temperature It depends on the “Ac2” parameter
"LA2" Condenser low temperature It depends on the “bLL”parameter
“dA” Door open Compressor according to rrd
“EA” External alarm Output unchanged.
“CA” Serious external alarm (i1F=bAL) All outputs OFF.
“CA” Pressure switch alarm (i1F=PAL) All outputs OFF
14.1 ALARM RECOVERY
Probe alarms P1”, “P2”, “P3” and “P4” start some seconds after the fault in the related probe; they
automatically stop some seconds after the probe restarts normal operation. Check connections
before replacing the probe.
Temperature alarms “HA”, “LA” “HA2” and “LA2” automatically stop as soon as the temperature
returns to normal values.
Alarms “EA” and “CA” (with i1F=bAL) recover as soon as the digital input is disabled.
Alarm “CA” (with i1F=PAL) recovers only by switching off and on the instrument.
14.2 OTHER MESSAGES
Pon Keyboard unlocked.
PoF Keyboard locked
noP In programming mode: none parameter is present in Pr1
On the display or in dP2, dP3, dP4: the selected probe is nor enabled
noA None alarm is recorded.
15. TECHNICAL DATA
Housing: self extinguishing ABS.
Case: XR40CX frontal 32x74 mm; depth 60mm;
Mounting: XR40CX panel mounting in a 71x29mm panel cut-out
Protection: IP20; Frontal protection: XR40CX IP65
Connections: Screw terminal block ≤2,5 mm2wiring.
Power supply: according to the model: 12Vac/dc, ±10%; 24Vac/dc, ±10%; 230Vac ±10%,
50/60Hz, 110Vac ±10%, 50/60Hz
Power absorption: 3VA max
Display: 3 digits, red LED, 14,2 mm high; Inputs: Up to 4 NTC or PTC probes.
Digital input: free voltage contact
Relay outputs: compressor SPST 8(3) A, 250Vac; or 20(8)A 250Vac
defrost: SPDT 8(3) A, 250Vac
Data storing: on the non-volatile memory (EEPROM).
Kind of action: 1B; Pollution grade: 2;Software class: A.;
Rated impulsive voltage: 2500V; Overvoltage Category: II
Operating temperature: 0÷60 °C;Storage temperature: -30÷85 °C.
Relative humidity: 20÷85% (no condensing)
Measuring and regulation range: NTC probe: -40÷110°C (-40÷230°F);
PTC probe: -50÷150°C (-58÷302°F)
Resolution: 0,1 °C or 1°C or 1 °F (selectable); Accuracy (ambient temp. 25°C): ±0,7 °C ±1 digit

 Installing and Operating Instructions
1592020042
1592020042 XR40CX GB ES m&M r1.1 05.03.2007.doc XR40C 4/4
16. CONNECTIONS
The X-REP output excludes the TTL output.. It’s present in the following codes:
XR40CX- xx2xx, XR40CX –xx3xx;;
16.1 XR40CX – 8A COMPRESSOR
N.C.
1234 567
9101112
Comp
Def
Evap.
Room
8
Hot Key/IV Probe
TTL or X-REPoutput
8(3)A250V 8(3)A250V
Line
12Vac/dc supply: connect to the terminals 7 and 8.
24Vac/dc supply: connect to the terminals 7 and 8.
120Vac supply: connect to the terminals 7 and 8.
16.2 XR40CX – 20A COMPRESSOR
N.C.
1234 567
9101112
Comp
Def
Evap. Room
8
Hot Key/IV probe
TTL or X-REP output
8(3)A250V 20(8)A250V
Line
12Vac/dc supply: connect to the terminals 7 and 8.
24Vac/dc supply: connect to the terminals 7 and 8.
120Vac supply: connect to the terminals 7 and 8.
17. DEFAULT SETTING VALUES
Lab
e
Name Range °C/°F
Set Set point LS÷US -5.0/0 - - -
Hy Differential 0,1÷25.5°C/ 1÷255°F 2.0/4 Pr1
LS Minimum set point -50°C÷SET/-58°F÷SET -50/-58 Pr2
US Maximum set point SET÷110°C/ SET ÷230°F 110/230 Pr2
Ot Thermostat probe calibration -12÷12°C /-120÷120°F 0.0/0 Pr1
P2P
Evaporator probe presence n=not present; Y=pres. Y Pr1
OE Evaporator probe calibration -12÷12°C /-120÷120°F 0.0/0 Pr2
P3P
Third probe presence n=not present; Y=pres. n Pr2
O3 Third probe calibration -12÷12°C /-120÷120°F 0.0/0 Pr2
P4P
Fourth probe presence n=not present; Y=pres. n Pr2
O4 Fourth probe calibration -12÷12°C /-120÷120°F 0.0/0 Pr2
OdS
Outputs delay at start up 0÷255 min 0 Pr2
AC Anti-short cycle delay 0 ÷50 min 1 Pr1
rtr P1-P2 percentage for regulation 0 ÷ 100 (100=P1 , 0=P2) 100 Pr2
CCt Continuos cycle duration 0.0÷24.0h 0.0 Pr2
CCS
Set point for continuous cycle (-55.0÷150,0°C) (-67÷302°F) -5/0 Pr2
COn
Compressor ON time with faulty probe 0 ÷255 min 15 Pr2
COF
Compressor OFF time with faulty probe 0 ÷255 min 30 Pr2
CF Temperature measurement unit °C ÷°F °C/°F Pr2
rES Resolution in=integer; dE= dec.point dE /in Pr1
Lod Probe displayed P1;P2 P1 Pr2
rEd2 X-REP display P1 - P2 - P3 - P4 - SEt - dtr P1 Pr2
dLy Display temperature delay 0 ÷ 20.0 min (10 sec.) 0 Pr2
dtr P1-P2 percentage for disply 1 ÷ 99 50 Pr2
tdF Defrost type EL=el. heater; in= hot gas EL Pr1
dFP
Probe selection for defrost termination nP; P1; P2; P3; P4 P2 Pr2
dtE Defrost termination temperature -50 ÷50 °C 8/46 Pr1
IdF Interval between defrost cycles 1 ÷120 ore 6 Pr1
MdF
(Maximum) length for defrost 0 ÷255 min 30 Pr1
dSd
Start defrost delay 0÷99min 0 Pr2
dFd Displaying during defrost rt, it, SEt, DEF it Pr2
dAd
MAX display delay after defrost 0 ÷ 255 min 30 Pr2
Fdt Draining time 0÷120 min 0 Pr2
dPo First defrost after startup n=after IdF; y=immed. n Pr2
dAF
Defrost delay after fast freezing 0 ÷ 23h e 50’ 0.0 Pr2
ALc
Temperat. alarms configuration rE= related to set;
Ab = absolute Ab Pr2
ALU
MAXIMUM temperature alarm Set÷110.0°C; Set÷230°F 110/230 Pr1
ALL
Minimum temperature alarm -50.0°C÷Set/ -58°F÷Set -50/-58 Pr1
AFH
Differential for temperat. alarm recovery (0,1°C÷25,5°C) (1°F÷45°F) 1/2 Pr2
ALd
Temperature alarm delay 0 ÷255 min 15 Pr2
dAO
Delay of temperature alarm at start up 0 ÷23h e 50’ 1.3 Pr2
AP2
Probe for temperat. alarm of condenser nP; P1; P2; P3; P4 P4 Pr2
AL2 Condenser for low temperat. alarm (-55 ÷ 150°C) (-67÷ 302°F) -40/-40 Pr2
AU2 Condenser for high temperat. alarm (-55 ÷ 150°C) (-67÷ 302°F) 110/230 Pr2
AH2 Differ. for condenser temp. alar. recovery [0,1°C ÷ 25,5°C] [1°F ÷ 45°F] 5/4 Pr2
Ad2 Condenser temperature alarm delay 0 ÷ 254 (min.) , 255=nU 15 Pr2
dA2 Delay of cond. temper. alarm at start up 0.0 ÷ 23h 50’ 1,3 Pr2
bLL Compr. off for condenser low temperature alarm n(0) - Y(1) n Pr2
AC2
Compr. off for condenser high
temperature alarm n(0) - Y(1) n Pr2
i1P Digital input polarity oP=opening;CL=closing cL Pr1
i1F Digital input configuration EAL, bAL, PAL, dor; dEF; Htr,
AUS EAL Pr1
did Digital input alarm delay 0÷255min 5 Pr1
Nps
Number of activation of pressure switch 0 ÷15 15 Pr2
odc Compress status when open door no; Fan; CPr; F_C no Pr2
rrd Regulation restart with door open alarm n – Y y Pr2
HES
Differential for Energy Saving (-30°C÷30°C) (-54°F÷54°F) 0 Pr2
Adr Serial address 0÷247 1 Pr2
PbC
Kind of probe Ptc; ntc ntc Pr2
onF on/off key enabling nu, oFF; ES ES Pr1
dP1 Room probe display -- -- Pr2
dP2 Evaporator probe display -- -- Pr2
dP3 Third probe display -- -- Pr1
dP4 Fourth probe display -- -- Pr1
rSE Valore set operativo actual set -- Pr1
rEL Software release -- -- Pr2
Ptb Map code -- -- Pr2
2Only for models XR40CX–xx2xx, XR40CX–xx3xx;
Dixell S.p.A. Z.I. Via dell’Industria, 27
32010 Pieve d’Alpago (BL) ITALY
tel. +39 - 0437 - 98 33 - fax +39 - 0437 - 98 93 13
E-mail: [e-mail] - http://www.dixell.com

3:14 PM Refrig-GF & SR 2/10/2012
Label Name Set-F Set-C Label Name Set-F Set-C
Set Set Point 35 2 dAF Defrost delay after fast freez 0.0 0.0
Hy Differential 4 2 ALc Temp. alarm configuration Ab Ab
LS Min Set Point 30 -1 ALU MAX. temperature alarm 45 7
US Max. Set Point 45 7 ALL MIN. temperature alarm 32 0
Ot Thermo Probe Calibration 0 0 AFH Diff for temp. alarm recovery 1 1
P2P Evap. Probe Presence Y Y ALd Temp. alarm delay 10 10
OE Evap. Probe Calibration 0 0 dAO Delay of temp alarm at start up 0.2 0.2
P3P Third Probe Presence n n AP2 Probe for temp. alarm of cond P4 P4
O3 Third Probe Calibration 0 0 AL2 Cond for low temp alarm -4 -4
P4P Fourth Probe Presence n n AU2 Cond for high temp alarm 23 23
O4 Fourth Probe Calibration 0 0 AH2 Diff for cond. Temp alarm rec 1 1
OdS Output Delay - Start Up 1 1 Ad2 Cond temp alarm delay 15 15
AC Anti-Short Cycle Delay 1 1 dA2 Delay of cond temp alarm start up 1.3 1.3
rtr P1-P2 Percentage 100 100 bLL Comp off for cond low temp alarm n n
CCt Continuous Cycle Duration 0 0 AC2 Comp off for cond high temp alarm nn
CCS Set Point - Continuous Cycle 0 0 i1P Digital input polarity CL CL
COn Comp. ON - Faulty Probe 4 4 i1F Digital input configuation EAL EAL
COF Comp. OFF - Faulty Probe 6 6 did Digital input alarm delay 5 5
CF Temp. Measure Unit F C Nps Number of act of pressure switch 15 15
rES Resolution in in odc Compress status when open dr no no
Lod Probe Display P3 P3 rrd Regulation restart with DR open alarm y y
dLy Display Temp Delay 0 0 HES Differential for energy saving 0 0
dtr P1-P2 Percentage for Display 50 50 Adr Serial address 1 1
tdF Defrost Type EL EL PbC Kind of probe NTC NTC
dFP Probe Selection Defrost Term P2 P2 onF on/off key enabling no no
dtE Defrost Term Temp. 40 4 dP1 Room probe display -- --
IdF Interval Between Defrost Cycle 24 24 dP2 Evaporator probe display -- --
MdF Max. Length for Defrost time 60 60 dP3 Third probe display -- --
dSd Start defrost delay 0 0 dP4 Fourth probe display -- --
dFd Displaying during defrost it it rSE Valore set operativo -- --
dAd MAX display delay after def. 10 10 rEL Software release 1.0 1.0
Fdt Draining time 0 0 Ptb Map code -- --
dPO First defrost after startup n n BOLD Pr2
GR Series
BOLD = PARAMETER 2 GSR Series
SR Series
TO SEE SET POINT TEMPERATURE, PRESS SET KEY AND RELEASE TO DISPLAY SET POINT
Control Factory (F-C) Settings February 10, 2012 XR40CX- (21-376)
1 of 1 XR40CX-HM Refrigerator (F-C) Setting 111206.xls