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XBF40 Series
Blast Freezers
(Model
Number:XBF40D)
Installation, Operation and Service
325334H02 Rev. B August 2014
Visit us online to register your warranty www.thermoscientific.com/labwarranty
IMPORTANT Read this instruction manual. Failure to follow the instructions in this manual can result in damage to the unit, injury to operating personnel, and poor equipment performance.
CAUTION All internal adjustments and maintenance must be performed by qualified service personnel.
Material in this manual is for informational purposes only. The contents and the product it describes are subject to change without notice. Thermo Fisher Scientific makes no representations or warranties with respect to this manual. In no event shall Thermo be held liable for any damages, direct or incidental, arising from or related to the use of this manual.
© 2014 Thermo Fisher Scientific Inc. All rights reserved.
Intended Use of the XBF40 Refrigeration System
The XBF40 described in this manual is not intended for use as a medical device and is not intended for in vitro diagnostic cases. This product is intended to be used to rapidly cool samples at air temperatures between -30C to -40C. This product is not intended for long-term storage.
Table of Contents
Table of Contents
Specifications ............................................................................1
Dimensions ...........................................................................1
Power Requirements ............................................................1
Environmental Operating Conditions ..................................1
Refrigerant Types and Charges ............................................1
Safety Precautions....................................................................2
Unpacking.................................................................................3
Installation ................................................................................5
Location ...............................................................................5
Leveling ...............................................................................5
Wiring ..................................................................................5
Door Seal ..............................................................................6
Installing a Drain Line (Optional) ........................................7
Final Checks .........................................................................7
Operation ..................................................................................8
Temperature Settings ...........................................................8
Start Up ................................................................................8
Loading ..............................................................................10
Operation ............................................................................10
Adjusting Shelves ..............................................................10
Maintenance ...........................................................................11
Cleaning the Cabinet ..........................................................11
Cleaning the Condenser .....................................................11
Cleaning the Condenser Filter ............................................12
Manual Defrost ..................................................................12
Drain Maintenance .............................................................13
Troubleshooting .....................................................................14
Warranty (Domestic) .............................................................16
Warranty (International) ......................................................17
Quick Start Guide ..................................................................18
Operating Specifications ....................................................18
Front Panel Keys ................................................................18
Key Combinations ..............................................................19
LED Descriptions ...............................................................19
Alarm Signals .....................................................................20
Silencing Audible Alarm ...................................................20
Setting the Real Time Clock ..............................................20
Manually Engage a Defrost Cycle .....................................20
Changing the Set Point .......................................................21
Table of Contents
Changing the High/Low Alarms ........................................21
Changing the Auto Defrost Cycle ......................................21
Appendix.................................................................................23
Theory Of Operation ..........................................................23
Refrigeration Circuit Diagram for Flushing, Evacuation and Troubleshooting ...........................................................25
Troubleshooting .................................................................28
Repairing Leaks .................................................................31
Compressor Replacement ..................................................32
230VAC Chassis Power Wiring Diagram .........................37
12VDC Control Power Wiring Diagram ...........................39
Service Parts List ...............................................................40
Dixell Control Parameter and Defaults (Factory
Default Settings) ................................................................42
1 Specifications
1.1 Dimensions
*
Height
Width
Depth
Weight
Interior: 51.23 in. (130.1 cm)
Exterior: 78 in. (196 cm)
Interior: 34 in. (85 cm)
Exterior: 43.7 in. (111 cm)
Interior (Cabinet): 28.22 in. (71.1 cm)
Interior (Freeze Area): 14.5 in. (36.8 cm)
Exterior: 38.4 in. (96 cm)
732 lbs. (332 kg)
1.2 Power Requirements
Voltage
Frequency
Amperage
208/230V
Unit will not operate outside specified voltage range
60Hz only
Minimum 20A
NEMA receptacle required 6-20R
Dedicated circuit required for proper operation
1.3 Environmental
Operating Conditions
Pollution Degree
Installation Category
Altitude
Humidity
Voltage Tolerance
Ambient Temperature
Product Usage
2
II
2000m MSL (mean sea level) max 60% in ambient up to 32 °C (90 °F)
±10%
15-32 °C (59-90 °F)
Indoor Use Only
1.4 Refrigerant Types and Charges
R-404a 45 oz. (1.275 kg)
Specifications
*
Published interior volumes are nominal; usable capacities may be offset by shelves, carrying baskets, blower coils, or cabinet protrusions.
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual 1
Safety Precautions
2 Safety Precautions
In this manual and on labels attached to this product, the words
WARNING and CAUTION mean the following:
WARNING:
A potentially hazardous situation which, if not avoided, could result in serious injury or death.
CAUTION:
A potentially hazardous situation which, if not avoided, may result in minor or moderate injury, or damage to the equipment.
WARNING:
The electrical hazard symbol to the left indicates situations with dangerous voltages and a potential for electric shock.
Before installing, using or maintaining this product, please be sure to read this manual and product warning labels carefully. Failure to follow these instructions may cause this product to malfunction, which could result in injury or damage.
Below are important safety precautions that apply to this product:
• Use this product only in the way described in the product literature and in this manual. Before using it, verify that this product is suitable for its intended use. If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.
• Do not modify system components, especially the controller. Use
Thermo Scientific exact replacement equipment or parts. Before use, confirm that the product has not been altered in any way.
• Your unit must be properly grounded in conformity with national and local electrical codes. Never connect the unit to overloaded power sources.
• Disconnect the unit from all power sources before cleaning, troubleshooting, or performing other maintenance on the freezer or its controls.
WARNING:
During normal operation, the freezer interior and loaded product will be extremely cold. Never touch the freezer interior or frozen
product without insulated gloves.
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Installation, Operation and Service Manual Thermo Scientific XBF40 Series Blast Freezers
Unpacking
CAUTION:
Never drill holes in or near the cabinet walls. Drilling could damage the insulation and make the freezer inoperable.
CAUTION:
When moving the freezer, always grasp cabinet surfaces; never pull the freezer by the latch handle. Do not move freezer with any product inside.
3 Unpacking
At delivery, examine the exterior for physical damage while the carrier’s representative is present. If exterior damage is present, carefully unpack and inspect the unit and all accessories for damage.
If there is no exterior damage, unpack and inspect the equipment within five days of delivery. If you find any damage, keep the packing materials and immediately report the damage to the carrier. Do not return goods without
written authorization. When submitting a claim for shipping damage, request that the carrier inspect the shipping container and equipment.
Refer to the drawing on the next page for instructions on removing the freezer from the pallet.
CAUTION:
This freezer is heavy, be sure you have enough personnel moving the freezer to prevent tipping.
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual
3
Unpacking
RAMP BOARDS WITH
SLOTTED END
LAG SCREWS
SHIPPING BRACKET
PALLET, SHIPPING
INSTRUCTIONS:
1.
2.
3.
4.
5.
6.
7.
8.
REMOVE AND DISCARD THE SHIPPING PLASTIC
CAREFULLY REMOVE AND DISCARD THE
PLYWOOD KICK PLATES ATTACHED TO THE
PALLET
CAREFULLY REMOVE AND DISCARD THE
CARDBOARD SHIPPING BUMPERS AND
CORNERS.
USING A 1/2''(1.3 cm) WRENCH, REMOVE ALL
SCREWS SECURING THE SHIPPING
BRACKETS TO THE PALLET
DISCARD ALL SHIPPING BRACKETS
REMOVE THE RAMP BOARDS FROM THE
SHIPPING PALLET WITH PHILLIPS SCREW DRIVER
AND LOCATE THE SLOTTED END OVER THE
RAMP BRACKET WITH THE SUPPORT BLOCKS ON
UNDERSIDE.
ALIGN THE CASTERS WITH THE RAMP BOARDS
BE SURE TO USE ENOUGH PERSONNEL TO ROLL
4
Installation, Operation and Service Manual
RAMP BRACKET
Thermo Scientific XBF40 Series Blast Freezers
Installation
4 Installation
CAUTION:
Improper operation of the equipment could result in dangerous conditions. Follow all instructions and operate within design limits noted on the data plate.
4.1 Location
Install the unit in a level area free from vibration with a minimum of eight inches (20 cm) of space on the top and sides, and six inches (15 cm) in back.
CAUTION:
Do not position the unit in a way that impedes access to the disconnecting device or circuit breaker in back of the unit.
Allow enough clearance so that the door can swing open at least 90 degrees.
The rear spacing posts provided with the freezer can be used to ensure proper clearance. To install the spacing posts, screw them into the back of the rear deck area,
Do not position the equipment in direct sunlight or near heating diffusers, radiators, or other sources of heat. The ambient temperature range at the location must be 59 to 90°F (15 to 32°C).
CAUTION:
Do not attempt to operate the unit in ambient temperatures above 90°F (32°C).
4.2 Leveling
The unit must be level. If the unit is out of level, you may need to shim the corners or casters with thin sheets of metal.
CAUTION:
The casters on this unit are provided for installation purposes only. Be sure to set the brakes on the casters before use. The unit should only be moved when it is empty of stored product.
4.3 Wiring
Before connecting your freezer to a power source, be sure to check the data plate for correct voltage. Wiring diagrams are attached to the back of the cabinet.
The power connector is a NEMA 6-20P. Therefore the installation site must have the corresponding receptacle, NEMA 6-20R.
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual
5
Installation
Power requirement is 208/230V. A minimum 20A service is required.
Due to the capacity of this unit it may not start reliably on marginal outlets with high voltage drop, even if the unloaded voltage is in the required range.
Supply conductors and connections must be sufficient to provide
NEMA-compliant power quality.
WARNING:
All electrical work must be performed by a qualified electrician in accordance with applicable local and national codes.
CAUTION:
Connect the equipment to the correct power source. Incorrect voltage can result in severe damage to the equipment.
Always connect the equipment to a dedicated (separate) circuit. Electrical codes require time delay fuse or circuit breaker protection for branch circuit conductors.
4.4 Door Seal
Door seal integrity is critical for freezers. A loose fitting gasket allows moist air to be drawn into the cabinet, resulting in quicker frost buildup on the evaporator coil, longer running time, poor temperature performance, and increased operation cost.
To check the door seal, complete the following steps:
1. Open the door.
2. Insert a strip of paper (a couple of inches wide) between the door gasket and the cabinet flange and close the door.
3. Slowly pull the paper strip from the outside. You should feel some resistance.
4. Repeat this test at 4-inch intervals around the door. If the door does not seal properly, replace the gasket.
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Installation, Operation and Service Manual Thermo Scientific XBF40 Series Blast Freezers
Installation
4.5 Installing a Drain
Line (Optional)
In normal operation, the refrigeration system will produce a quantity of water that is condensed out of the air and melted off during the defrost cycle. As delivered, this unit routes the water to a stainless steel pan, where it will be evaporated back into the room by compressor heat. An optional drain kit can be installed to divert the water to a facility drain if desired.
This installation should only be performed by a qualified and properly equipped service technician.
To install the optional drain kit:
1. Make sure that the rear breaker switch is turned to “OFF”, the unit is unplugged, and there is no power present.
2. Remove the sheet metal side cover on the latch side of the unit.
3. Place the small end of the tubing adapter into the tubing included in the kit. A drop of liquid soap added to the fitting will enable the tubing to slide on more easily.
4. Locate the clear/white plastic drain hose in the machine compartment.
Place the large end of the tubing adapter into the open end of the drain hose.
5. Route the clear tubing out the grate on the rear of the unit to a suitable facility drain. Ensure that the tube is not kinked or pinched and is protected from traffic and other potential sources of damage. Keep the tube at least 4 inches below the top of the unit’s machine compartment for the entirety of its run; rising above this level will cause water to back up into the refrigerated compartment.
6. Replace all side covers and grates.
7. Start or restart the unit, following instructions in Section 5.2.
The unit can be returned to evaporative mode (the installed drain line can be disabled) by removing the tubing adapter and small tube. In that case, ensure that the end of the large tube is securely pointed towards the evaporator pan before replacing the side panel.
4.6 Final Checks
Before start up, complete the following steps:
1. Make sure that the unit is free of all wood or cardboard shipping materials, both inside and outside.
2. Verify that the unit is connected to a dedicated circuit as per the data plate voltage requirements.
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual
7
Operation
5 Operation
5.1 Temperature
Settings
The factory default temperature setting is -40°C.
CAUTION:
The freezers described in this manual are designed for optimum performance at -40°C. This set point can be changed, but efficiency and effectiveness may be compromised. It is advisable to call
Technical Service before changing set points.
To change the factory temperature settings, refer to the “Quick Start
Guide”preceding the controller instructions.
5.2 Start Up
To start up the freezer, complete the following steps:
1. Plug in the power cord.
2. Before starting the unit, pour a liter of water down the central drain, as shown in the drawing on the next page.
3. The breaker switch is located at the bottom rear of the unit. Switch it to the ON position. The condenser fan will start immediately. There is a time delay before the compressor will come on. The delay is indicated by a flashing snowflake symbol on the display.
4. Set the onboard clock to local time, following the instructions in the
“Quick Start Guide”preceding the controller instructions.
5. Set defrost times to match your facility schedule, following instructions
in the “Quick Start Guide”preceding the controller instructions. Defrost
takes approximately 30 minutes. Recommended maximum run time without a defrost is eight hours; more frequent defrosts may be advisable depending on usage or ambient conditions.
6. Confirm that the snowflake and fan symbols are illuminated on the display and that the compressor and fans are running. Note that the evaporator fan does not run when the main cabinet door is open.
7. Allow the unit to run unloaded for at least 60 minutes before adding any product.
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Installation, Operation and Service Manual Thermo Scientific XBF40 Series Blast Freezers
Operation
POUR 1 LITER OF WATER DOWN
CENTRAL DRAIN BEFORE
STARTING THE UNIT
DETAIL A
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual
9
Operation
5.3 Loading
To achieve optimum performance, the unit should be loaded when the display reads -30°C or colder (typically within 60 minutes of initial startup).
The maximum rated load is 90 Liters of room-temperature fluid. Do not load the unit with product that is warmer than 32°C.
The maximum load that can be placed on any shelf is 45 kg, evenly distributed. Do not overload shelves.
The maximum load that can be placed in each removable white basket is
10kg. Do not exceed the rated load of the basket.
When loading the unit, only open the inner door you need to open for shelf access. Do not leave the door open longer than necessary.
Do not load during timed or manual defrost modes.
Do not attempt to move the unit while it is loaded. The shifting weight inside a loaded unit can cause damage or injury.
Depending on product load temperature and duration of door opening, it is normal for the temperature display to show warm-up after initial product load.
5.4 Operation
The unit can be safely loaded at any time the unit is displaying a temperature of -30C or below and not in defrost mode.
Defrost will be initiated automatically on the schedule programmed in the controller. Product may be left in the freezer if desired, but the freezing time will be extended due to the defrost heat load. If necessary, a defrost cycle can be triggered at any time by holding the controller snowflake key for two
seconds (refer to the “Quick Start Guide”preceding the controller
instructions).
5.5 Adjusting Shelves
The XBF40 comes standard with three (3) stainless steel shelves. For safety during shipping, the shelves are secured to the back panel with three (3) screws. To adjust the height of the shelves, be sure to remove the screws first.
The screws do not need to be reinstalled when the height is adjusted.
If the unit needs to be moved, it is recommended to secure the shelves to the back panel of the unit, using the screws provided.
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Installation, Operation and Service Manual Thermo Scientific XBF40 Series Blast Freezers
Maintenance
6 Maintenance
6.1 Cleaning the Cabinet
The interior and exterior of the cabinet should be cleaned every three months, more often if necessary.
To clean the interior of the unit, use a dilute bleach (10% bleach and 90% water) or alcohol solution. The shelves and baskets may be removed for easier cleaning. Do not expose the surfaces to thinner, acid, or any other harsh solvent. Rinse the shelves and wipe them dry with a soft cloth.
The exterior may be cleaned with any household cleaning wax.
6.2 Cleaning the
Condenser
CAUTION:
Condensers should be cleaned at least every two months. In heavy traffic areas, condensers load with dirt more quickly. Failure to keep the condenser clean can result in equipment warm-up or erratic temperatures.
WARNING:
Be sure to disconnect the unit from main power before cleaning the condenser.
CAUTION:
Never clean near condensers with your fingers. Some surfaces are sharp.
To clean the condenser:
1. Disconnect the power.
2. Slide the front grill to the right.
3. Remove both filters.
4. Use a vacuum cleaner with hose and soft brush attachments to clean the front face of the finned surface.
5. Clean up any loose dust, replace the filters (refer to Section 6.3 for filter
cleaning), and close the front grill.
6. Reconnect the power.
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual
11
Maintenance
6.3 Cleaning the
Condenser Filter
Clean the condenser filters every month, or more if required. To clean the filters:
1. Slide the front grill to the right.
2. Remove both filters.
3. Gently vacuum or shake the filters to remove loose dust.
4. Rinse in clean water, shake excess water from the filters, and replace the filters.
5. Reconnect the power.
6.4 Manual Defrost
Although the freezer has an automatic powered coil defrost, the entire cabinet should be defrosted at least once a week; more frequent defrost may be necessary depending on room ambient humidity and frequency of door opening. Defrost the freezer manually once a week or whenever the interior frost interferes with use or temperature performance.
To defrost:
1. Remove all products and place in a safe storage location.
2. Turn off the unit and open all outer and inner doors.
3. Wipe inner and outer doors with a dry soft cloth to prevent condensation.
4. Wipe the inner doors to minimize water dropping onto the floor.
5. Let the freezer stand open until the ice and frost buildup has melted. If desired a fan can be directed at the unit to accelerate the defrost.
6. Dispose of any pieces of ice and wipe out any water standing in the bottom of the cabinet and on the inner doors.
7. Close all the doors and restart the freezer.
CAUTION:
When defrosting your freezer, never use sharp or heavy tools such as chisels or scrapers. Damage to the equipment can result. Let the ice melt enough so that it can be easily removed. Wear protective gloves when cleaning the interior.
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Installation, Operation and Service Manual Thermo Scientific XBF40 Series Blast Freezers
Maintenance
If there is freezer odor, wash the interior with a solution of baking soda and warm water. Clean the exterior with any common household cleaning solution.
6.5 Drain Maintenance
It is normal for water to collect at the bottom of the cabinet after a defrost cycle. When the water rises above the drain level, the water drains either to a heated condensate pan or to an external drain line if one is installed (refer to
After a defrost cycle you may remove excess water using paper towels and, if desired, disinfectant.
Do not allow solid material to enter the drain, as this will clog the drain line.
To help keep the drain line clean, 0.5L of a 10% bleach solution should be poured down the drain every 3 months.
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual
13
Troubleshooting
7 Troubleshooting
Problem
Unit does not operate; display is blank
Breaker trips on startup
Temperature fluctuates
Unit warms up
WARNING:
Troubleshooting procedures involve working with high voltages which can cause injury or death. Troubleshooting should only be performed by trained personnel.
This section is a guide to troubleshooting equipment problems.
Table 1: Troubleshooting Procedures
Cause
Power supply
Power supply
Controller Parameters
Condenser
Door is open
Warm product recently loaded in unit
Solution
Check that the cord is securely plugged in.
Plug another appliance into the outlet to see if it is live.
If the outlet is dead, check the circuit breaker or fuses.
Contact an electrician to confirm whether the outlet is providing suitable power for the unit.
Make sure that the control is set correctly.
Make sure the condenser is clean.
Make sure the door is completely closed.
Allow ample time to recover from loading warm product.
Power supply
Compressor
Evaporator iced over
Check for proper voltage to the unit. If there is no voltage to the unit, call an electrician.
If the compressor is not running, look for a green snowflake symbol on the controller display, indicating that the system is calling for the compressor to be on.
If the snowflake is illuminated but you do not hear the compressor running, allow the unit 2 hours to reset its internal protector. If the compressor does not restart after 2 hours call Technical Service.
If the snowflake is flashing, the unit is in Start Delay mode: wait for the flashing to stop and then see if the compressor starts. If the snowflake is not illuminated, check the controller parameters to make sure they are set correctly.
Trigger a manual defrost cycle by holding the "melting snowflake" key until the unit enters defrost mode.
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Installation, Operation and Service Manual Thermo Scientific XBF40 Series Blast Freezers
"P1" Alarm
"P2" Alarm
"HA" Alarm
"LA" Alarm
"dA" Alarm
"rtc" Alarm
"rtF" Alarm
Problem
Troubleshooting
Table 1: Troubleshooting Procedures
Cause Solution
Evaporator fan not functioning
Door open alarm
Real time clock alarm
Clock failure alarm
Confirm that the fan symbol is illuminated on the controller and that the evaporator fan is turning.
If the fan symbol is not illuminated, check that the magnet on the bottom hinge side of the door is properly placed in the depression on the door.
If the fan symbol is illuminated but the fan is not turning, check to make sure it is not blocked by frost buildup. If it free and turns freely, contact Technical Service.
Cabinet temperature probe failure
Evaporator temperature probe failure
Replace cabinet temperature probe
Replace evaporator temperature probe
High cabinet temperature alarm
Allow ample time to recover from loading warm product.
Contact Service if unit does not recover.
Low cabinet temperature alarm Check controller parameters
Close door. If alarm persists, check door switch magnet location. If magnet is placed correctly, contact Technical
Service.
Set controller clock
Contact Technical Service to replace controller.
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual
15
Warranty (Domestic)
8 Warranty
(Domestic)
Domestic Warranty • 24 Months Full Warranty Parts and Labor
International Warranty • 18 Months parts only
The Warranty Period starts two weeks from the date your equipment is shipped from our facility. This allows for shipping time so the warranty will go into effect at approximately the same time your equipment is delivered.
The warranty protection extends to any subsequent owner during the warranty period.
During the first twenty four (24) months from shipment, Thermo Fisher
Scientific Inc, through its authorized Dealer or service organizations, will at its option and expense repair or replace any part found to be non-conforming in material or workmanship. Thermo Fisher Scientific Inc reserves the right to use replacement parts, which are used or reconditioned.
Replacement or repaired parts will be warranted for only the unexpired portion of the original warranty.
This warranty does not apply to damage caused by (i) accident, misuse, fire, flood or acts of God; (ii) failure to properly install, operate or maintain the products in accordance with the printed instructions provided, (iii) causes external to the products such as, but not limited to, power failure or electrical power surges, (iv) improper storage and handling of the products, (v) use of the products in combination with equipment or software not supplied by Thermo
Fisher; or (vi) installation, maintenance, repair, service, relocation or alteration of the products by any person other than Thermo Fisher or its authorized representative. To obtain proper warranty service, you must contact the nearest authorized service center or Dealer. Thermo Fisher Scientific, Inc’s own shipping records showing date of shipment shall be conclusive in establishing the warranty period. At Thermo Fisher’s option, all non-conforming parts must be returned to Thermo Fisher postage paid and replacement parts are shipped
FOB Thermo Fisher’s location.
Limitation of Liability
THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER
WARRANTIES, WHETHER WRITTEN, ORAL, OR IMPLIED. NO
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE SHALL APPLY. THERMO FISHER DOES NOT
WARRANT THAT THE PRODUCTS ARE ERROR-FREE OR WILL
ACCOMPLISH ANY PARTICULAR RESULT.
THERMO FISHER SHALL NOT BE LIABLE FOR ANY INDIRECT OR
CONSEQUENTIAL DAMAGES INCLUDING, WITHOUT LIMITATION,
DAMAGES TO LOST PROFITS OR LOSS OF PRODUCTS.
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Installation, Operation and Service Manual Thermo Scientific XBF40 Series Blast Freezers
Warranty (International)
9 Warranty
(International)
THERMO FISHER SCIENTIFIC FREEZER INTERNATIONAL
WARRANTY
The Warranty Period starts two months from the date your equipment is shipped from our facility. This allows for shipping time so the warranty will go into effect at approximately the same time your equipment is delivered.
The warranty protection extends to any subsequent owner during the warranty period. Dealers who stock our equipment are allowed an additional four months for delivery and installation, providing the warranty card is completed and returned to the Technical Services Department.
During the first 18 months of the warranty period, component parts proven to be non-conforming in materials or workmanship will be repaired or replaced at Thermo's expense, labor excluded. Installation and calibration is not covered by this warranty agreement. The Technical Services Department must be contacted for warranty determination and direction prior to any work being performed. Expendable items, i.e., glass, filters, pilot lights, light bulbs and door gaskets are excluded from this warranty.
Replacement or repair of component parts or equipment under this warranty shall not extend the warranty to either the equipment or to the component part beyond the original 18 month warranty period. The
Technical Services Department must give prior approval for the return of any components or equipment.
THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER
WARRANTIES, WHETHER WRITTEN, ORAL, OR IMPLIED. NO
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE SHALL APPLY. Thermo shall not be liable for any indirect or consequential damages including, without limitation, damages relating to lost profits or loss of products.
Your local Thermo Scientific Sales Office is ready to help with comprehensive site preparation information before your equipment arrives.
Printed instruction manuals carefully detail equipment installation, operation, and preventive maintenance.
If equipment service is required, please contact your local Thermo Scientific office or local distributor.
We're ready to answer your questions on equipment warranty, operation, maintenance, service, and special applications. Outside the USA, contact your local Thermo Scientific office or distributor for warranty information.
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual
17
Quick Start Guide
10 Quick Start
Guide
10.1 Operating
Specifications
Power requirements
Operating environment
208/230V ±10%, 60Hz, 20 amp breaker on a dedicated circuit
15°C - 32°C ambient temperature; maximum 60% relative humidity
10.2 Front Panel Keys
To display target set point; in programming mode it selects a parameter or confirms 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.
(DOWN) To see the min stored temperature; in programming mode it browses the parameter codes or decreases the displayed.
To switch the instrument on and off (when onF = OFF).
Not applicable.
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Installation, Operation and Service Manual Thermo Scientific XBF40 Series Blast Freezers
10.3 Key Combinations
To lock and unlock the keyboard.
To enter in programming mode.
To return to the room temperature display.
10.4 LED Descriptions
LED MODE
ON
Flashing
ON
Flashing
ON
Flashing
ON
ON
ON
Flashing
FUNCTION
Compressor enabled.
Anti-short cycle delay enabled.
Defrost enabled.
Drip time in progress.
Fans enabled.
Fans delay after defrost in progress.
An alarm is occurring.
Continuous cycle is running.
Measurement unit.
Programming phase.
Quick Start Guide
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual 19
Quick Start Guide
10.5 Alarm Signals
MESSAGE
dA rtc rtF
P1
P2
H2
LA
CAUSE
Cabinet probe failure
Evaporator prove failure
Maximum temperature alarm
Minimum temperature alarm
Door open
Real time clock alarm
Real time clock board failure
10.6 Silencing Audible
Alarm
The audible alarm can be silenced by pressing any key.
10.7 Setting the Real
Time Clock
1 When the device is switched ON, it’s necessary to program the time and day.
2 Enter the PR1 programming menu by pushing the
SET + DOWN arrow keys for 3 seconds.
3 The
rtc parameter is displayed. Push the SET key to enter the real time clock menu.
4 The
Hur (hour) is displayed.
5 Push the
SET key and set current hour by the UP and DOWN arrow keys then push
SET to confirm the value.
6 Repeat the same operations on the
Min (minutes) and dAY (day) parameters.
7 To exit: Push the
SET + UP arrow keys or wait 15 seconds (without pushing any keys).
10.8 Manually Engage a
Defrost Cycle
Push and hold the DEF key for more than 2 seconds and a manual defrost will start.
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Installation, Operation and Service Manual Thermo Scientific XBF40 Series Blast Freezers
Quick Start Guide
10.9 Changing the Set
Point
1 Push and hold 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 point value, push the
UP or DOWN arrows within 10 seconds.
4 Push the
SET key again or wait 10 seconds.
10.10 Changing the
High/Low Alarms
1 Enter the programming mode by pressing the SET + DOWN arrow keys for
3 seconds (the °C or °F LED starts blinking).
2 Select the required alarm by pressing the UP or DOWN arrows (ALU = max. temp. ALL = min. temp.)
3 Use the SET key to display the value.
4 Use the UP or DOWN arrows to change the value.
5 Press SET to store the new value and move to the next parameter.
6 To exit: press SET + UP arrow or wait 15 seconds without pressing a key.
10.11 Changing the Auto
Defrost Cycle
1 Enter the programming mode by pressing the
SET + DOWN arrow keys for
3 seconds (the
°C or °F LED starts blinking).
2 Enter the hidden menu by pressing the
SET + DOWN arrow keys for 3 seconds.
3 Select the required auto defrost by pressing the
UP or DOWN arrows (Ld1 to
Ld3).
4 Use the
SET key to display the value.
5 Use the
UP or DOWN arrows to change the value (24 hr. clock format).
6 Press
SET to store the new value and move to the next parameter.
7 To exit: press
SET + UP arrow or wait 15 seconds without pressing a key.
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual
21
Service Section of Manual -- Not Intended for User
Appendix
11 Appendix
CAUTION:
No user-serviceable components inside unit. All service work must be performed by a properly trained and equipped refrigeration/electronic service technician.
11.1 Theory Of
Operation
The XBF40 is a -40C single-stage refrigeration system with a Dixell controller. Although it has some unique features due to the blast freezing application, the basic operation of the unit is similar to any other low-temperature forced-air freezer.
The compressor is a hermetic reciprocating design with a remote-mounted run capacitor, start capacitor, and start relay. Waste heat from the compressor discharge line is used to evaporate condensate water produced during the defrost cycle.
The condenser fan runs continuously regardless of compressor status in order to provide condenser cooling during the off cycle and reduce the compressor starting load.
To ensure rapid load sensing and high heat transfer the evaporator fan runs near-continuously, only stopping for defrost and door openings. When running the fan forces cold air from the evaporator coil into the front part of the cabinet where it is directed downwards over the load before being pulled under the internal cabinet wall and directed up the rear of the unit to be cooled and distributed again. If the cabinet contents block this return air slot the airflow will be reduced and freezing performance will degrade.
The controller has an onboard real-time clock that is used to trigger defrost cycles. Up to 6 automatic defrosts can be programmed per day. The factory default is 3 with one occurring every 8 hours. Depending on the ambient humidity, number of door openings, and type of application more or fewer defrost cycles may be required to maintain performance. When the defrost cycle starts the compressor and evaporator fan turn off and electric heaters on the evaporator and drain tube are energized; melted water will drain from the evaporator into an evaporating pan in the base of the unit.
The defrost cycle will terminate when the programmed defrost time has elapsed or when the evaporator temperature probe reaches its programmed termination temperature. A bimetallic temperature safety switch is installed in the evaporator enclosure to prevent an overheat condition in the event of a control failure or programming fault.The evaporator fan and defrost heaters are powered through a cable that runs up the outside rear of the cabinet. This cable is protected by a sheet metal guard.
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual
23
Appendix
The controller is powered by 230VAC but switches 12VDC to control the freezer functions. A power supply located on the outside of the relay enclosure provides the 12VDC control power. The compressor is activated by a large 12VDC contactor that is located inside the relay enclosure. The evaporator fan and defrost heaters are controlled by two smaller 12VDC relays located on the outer surface of the relay enclosure. Both the contactor and relays are switching 230VAC that is driving the associated loads.
Refrigerant flow is managed by a thermostatic expansion valve (TXV) located in the evaporator enclosure, which opens and closes in response to evaporator outlet temperature. The TXV is adjustable, but in normal operation adjustment should not be necessary.
A solenoid valve between the compressor discharge and suction lines is opened during defrost in order to provide a balanced-pressure condition for compressor startup. Due to refrigerant flow through this valve, it is normal to hear a noticeable whistling noise from the refrigeration deck during the first few minutes of the defrost cycle.
The suction accumulator is equipped with an internal heat exchanger where the liquid refrigerant line is passed through the accumulator before being sent to the expansion device. This subcools the liquid in order to increase system capacity while also heating the compressor suction stream to reduce the risk of liquid slugging.
In the event of a sensor failure or loss of communications with the evaporator or cabinet temperature probe the controller will display a fault alarm and switch to a modified running mode that permits continued usage with some features of the unit disabled. A problem with the cabinet probe will cause the compressor to run constant on, stopping only for defrosts. A problem with the evaporator probe will cause defrosts to terminate based on time only. Although continued short-term usage is possible with either of these faults, the resulting condition is less efficient than normal running and should be corrected as soon as possible.
Two tanks are connected to the compressor suction line through a capillary tube. These tanks hold charge at initial startup, and then gradually release it to the system once the compressor is running. The purpose of this system is to reduce the starting load on the compressor; once the system is running at temperature the tanks are effectively inert.
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Installation, Operation and Service Manual Thermo Scientific XBF40 Series Blast Freezers
Appendix
11.2 Refrigerati on Circuit
Diagram for
Flushing,
Evacuation and
Troubleshooting
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual
25
Appendix
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26
Installation, Operation and Service Manual Thermo Scientific XBF40 Series Blast Freezers
Appendix
Figure 1. Manafold connections for Vacuum pump and Electronic
Micron Gauge
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual 27
Appendix
11.3 Troubleshooting
CAUTION:
Only certified Refrigeration or Electronic Technicians should service the system.
Note
Before attempting to troubleshoot the unit, perform the following checks.
Correct what is found wrong and re-evaluate the unit before continuing.
Before troubleshooting, verify that the main power is supplied to the freezer.
SYMPTOM
Cabinet temperature colder than Control Setpoint
Displayed temperature does not match freezer temperature.
Frost build-up on breaker strip
Table 2: Troubleshooting Procedures
POSSIBLE CAUSE
1.
Control programmed incorrectly.
2.
Inoperative control.
TEST AND CORRECTION
1.
Reprogram.
3.
Temperature sensor defective.
1.
Needs calibration.
2.
Defective sensor.
1.
Gasket not sealing properly.
2.
Door latch may need adjustment.
2.
Measure voltage on back of controller on Pins 1 & 3, Replace control if necessary.
3.
Replace sensor
1.
Recalibrate controller as specified in procedure.
2.
Replace
1.
Gasket wrinkled, worn or torn.
Check retaining means and replace if necessary. Frost will accumulate at the point of an air leak. Check carefully in the area of any concentrated frost build-up.
2.
Check door latch and adjust for proper door adjustment.
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Installation, Operation and Service Manual Thermo Scientific XBF40 Series Blast Freezers
SYMPTOM
Compressor does not run
Appendix
Table 2: Troubleshooting Procedures
POSSIBLE CAUSE
1.
No power.
TEST AND CORRECTION
1.
Check power source. If none, call qualified electrician.
2.
Low voltage.
3.
Inoperative control.
4.
Loose wiring at terminals.
5.
Inoperative compressor contactor.
6.
Open or grounded compressor windings.
7.
Defective starting components.
8.
Stuck / seized compressor.
2.
Read supply voltage while unit is running. Reading must equal rated
±10%.
3.
Refer to the controller setup procedure.
4.
Inspect all electrical connections.
5.
Start compressor using a compressor analyzer.
6.
Disconnect compressor leads and read phase to phase and for any phase to ground. If electrical checks are OK, Then, check the compressor start gear.
7.
Replace starting components.
8.
Test by using a compressor analyzer, if unsuccessful, replace compressor.
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual
29
Appendix
SYMPTOM
Unit runs but little or no refrigeration.
Run times are getting longer.
Displayed temperature does not match freezer temperature.
Table 2: Troubleshooting Procedures
POSSIBLE CAUSE
1.
Loss of refrigerant.
TEST AND CORRECTION
1.
Check for the leak, repair, evacuate and recharge.
2.
Compressor will not pump.
3.
Inoperative condenser fan.
4.
Dirty insufficient air flow
5.
High room temperature.
6.
Refrigerant leak.
7.
Condenser fan blade is loose.
8.
Excessive ice on or in evaporator
9.
Improper TXV settings
1.
Needs calibration.
2.
Defective sensor.
2.
Install low-side gauge. If running pressure is no lower than starting pressure, replace compressor, evacuate and recharge.
3.
Check for fan blade obstruction.Replace fan motor if necessary.
4.
Remove/Clean condenser filter; ensure cabinet has a minimum of 6’ clearance all around it. Check for fan blade obstruction. Replace fan motor if defective.
5.
Ensure room temperature is <90°F
(32.2°C).
6.
See Leak Check and Charging procedures.
7.
Tighten fan blade.
8.
Check defrosts settings on the controller.Defrosting required of the evaporator.
9.
Contact Service Support
1.
Recalibrate per specified procedure.
2.
Replace Sensor
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Installation, Operation and Service Manual Thermo Scientific XBF40 Series Blast Freezers
SYMPTOM
Unit runs continuously.
Appendix
Table 2: Troubleshooting Procedures
POSSIBLE CAUSE
1.
Poor gasket seal.
TEST AND CORRECTION
1.
Check and replace door gasket or adjust door alignment.
2.
System undercharged.
2.
Check operating pressures. If low, shut down, warm up overnight and check for refrigerant leak.
3.
Check operating pressures.
3.
System overcharged.
4.
Non-condensable gas/air in system.
4.
Check operating pressures, discharge will be high and suction pressure low. Recover charge, evacuate and recharge.
5.
Replace Compressor.
5.
Worn or inefficient compressor.
6.
Defective temperature sensor or control settings
6.
Replace sensor or check control programming
11.4 Repairing Leaks
Copper tubing joints are made using “Phos Copper” solder which is a high temperature brazing allow needing no flux and with good working characteristics. Leaks in these joints are usually caused by copper to copper or copper to steel contact (rubbing) which can cause a hole in the copper tubing.
Leaks occurring in components such as pressure controls or valves usually must be dealt with by replacing the offending component. Whenever a system has been opened for repair, it must be evacuated to a very low vacuum (50 microns or lower) and the drier must be replaced. Always replace the drier with the same BRAND AND SIZE as originally supplied.
EVACUATION
A refrigeration system’s worst enemy is air in the system, because all air contains moisture. Moisture in a refrigeration system will mix with the oil which has refrigerants in it, and with the added compressor heat, it will or can cause an acid condition within the system. This acid will cause the compressor to eventually to fail. It is quite simple to purge air from a system but eliminating moisture is more difficult. There has always been a tendency with technicians to open a system and not replace the drier after doing so.
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual
31
Appendix
Note
The filter-drier must ALWAYS be replaced whenever the refrigeration system has been opened to atmosphere.
THE VACUUM PUMP
When evacuating a system, there is an initial flow of gases and moisture toward the vacuum pump but, as the vacuum becomes deeper, it is recommended to perform a triple evacuation to ensure that as much as possible moisture is removed. For this reason, a means of speeding up the evacuation process called triple evacuation is required. (See EVACUATION
PROCEDURE).
Always start the vacuum pump procedure with new clean oil and should change it during after the first deep evacuation (while the oil is still hot) and after each evacuation job because it becomes contaminated during the process of evacuation. If the pump oil is contaminated, it will be apparent that the pump’s capability to achieve a good deep vacuum will be compromised. Also, remember that moisture in the pump oil is a mortal enemy of the finely machined surfaces inside the pump and which will affect the life and performance of the pump. It is good practice to change the pump oil after each use, using the dry oil recommended by the pump manufacturer. The pump should be put away in a clean, dry condition ready for the next job.
11.5 Compressor
Replacement
CAUTION:
The following repair procedures are to be performed by qualified refrigeration technicians only.
CAUTION:
Because cabinet temperatures affect refrigerant pressures, never attempt to repair, evacuate or charge a refrigeration system unless the freezer has been turned Off, unplugged, and left open for 24 hours.
1. Proper tools and equipment must be on hand to make a trouble free compressor replacement. Review the discussion covering the vacuum pump.
CAUTION:
Preventing the entrance of air to the refrigeration system and its resultant contamination is vital to the success of any repair procedure that involves opening the system. Be sure to observe all current regulations prohibiting venting of refrigerants.
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Installation, Operation and Service Manual Thermo Scientific XBF40 Series Blast Freezers
Thermo Scientific XBF40 Series Blast Freezers
Appendix
2. Turn off all power to the freezer and unplug the power cord.
3. Locate the compressor in the compressor deck.
4. Attach the gauge manifold to the suction and discharge process tubes via saddle valves.
5. Recover, and dispose of, the refrigerant charge in accordance with current regulations.
REMOVE THE COMPRESSOR
1. Cut Suction and Discharge lines to the failed compressor.
2. Remove the compressor mounting bolts.
3. Remove the cover from the electrical junction box on the side of the compressor. Label and disconnect the power leads.
4. Remove the compressor from of the machine compartment.
5. Test a sample of the compressor oil. If non-acidic, no backflush would be required. If there is an acid condition (see BACKFLUSH
PROCEDURE) and follow the procedure to backflush the evaporator, condenser, and all of the tubing; the compressor, accumulators, expansion tanks, TXV and tubing that cannot be flushed MUST be replaced.
INSTALL THE NEW COMPRESSOR
CAUTION:
Replacement compressors are pressurized with nitrogen and may only be installed by qualified refrigeration technicians. Also, while brazing in the replacement components, a very low purge of dry nitrogen must be applied to reduce oxidation from occurring during the brazing procedure. Purge the nitrogen through the system or components during brazing and allow it to vent from the open port through the manifold.
6. Mount compressor on base and reinstall rubber feet and bolts.
7. Braze the suction and discharge tubing to the new compressor. Also install any of the other components that may have been replaced if there was an acid condition.
8. Install process tube fittings to the end of the process tubes for evacuation and recharging.
Installation, Operation and Service Manual
33
Appendix
CHECK FOR LEAKS
1. After all the components and tubing has been brazed closed, pressurize the system with nitrogen to 150 psig and check all the joints using a leak soap mixture, if not leaks are detected, purge the nitrogen from the system and wipe the joints to remove the soap film. You now can now start the triple evacuation procedure as explained in the next steps.
EVACUATION
2. The gauge manifold should be still attached to the process tubes; remove the center hose from the nitrogen tank manifold and install an electronic micron meter in line with the center hose from the manifold gauge and the vacuum pump.
3. Triple Evacuation Procedure:
4. Perform a triple evacuation procedure as described; evacuating the system until the electronic vacuum gauge read 1500 microns, then break the micron level with about 5 psig of dry nitrogen and let it set for 5 minutes. Purge the 5 pisg of nitrogen back to 1 psig and then start the vacuum pump again allow the system to evacuate until the electronic micron gauge reads 500 microns, follow the same procedure of breaking the evacuation with nitrogen back to 5 psig. Bleed the nitrogen back to
1 psig and turn on the vacuum pump again until the electronic vacuum gauge reads 50 microns or lower.
5. Close the vacuum pump inlet valve, leaving the pump running and watch the electronic micron gauge carefully.
Note
The vacuum gauge must be installed between the compressor and the pump shut-off valve to perform this check. The electronic vacuum gauge should not rise above 200 microns within a 20 minute blank off.
Evacuate the system following the above procedure; vacuum now should hold or meeting the 200 micron level discussed earlier. If not, then this indicates either moisture in the system or a leak in the tubing or components. Check the system again for a leak, by as described above and then repeat this process as many times as necessary to obtain the required vacuum and holding time.
BREAK THE VACUUM WITH REFRIGERANT AND CHARGING
6. Close the gauge manifold hand valves and the vacuum pump shut off valve. Shut the pump off and change the center manifold hose to the service cylinder of the appropriate refrigerant. Purge the center hose for
34
Installation, Operation and Service Manual Thermo Scientific XBF40 Series Blast Freezers
Appendix one or two seconds with gas from the service cylinder and then crack the refrigerant cylinder valve and the manifold discharge hand valve. Gas will flow into the compressor crankcase.
7. Charge the system to the required data plate amount, this can be done by weighing the cylinder.
8. Remove gauge manifold and seal the fittings that were installed in the service valve gauge ports. Turn power on and begin the run test of the cabinet.
This completes the installation of a replacement compressor.
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual 35
Appendix
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36
Installation, Operation and Service Manual Thermo Scientific XBF40 Series Blast Freezers
11.6 230VAC
Chassis Power
Wiring Diagram
UNIT WIRING
BR BL
CIRCUIT BREAKER SWITCH
BR
DOOR
SENSOR
O
1
6
W W
18 20
CONTROLLER
W R
22 23 24
W
5
BL
EVAPORATOR
PROBE
O
3 4
CONDENSER FAN
7
B B
W
R
BL/O
BR
EVAPORATOR FAN RELAY
EVAPORATOR HEATER RELAY
12VDC POWER SUPPLY
W
R
BL/O
BL
CONTROL
PROBE
CONTACTOR
B
RUN
CAPACITOR
START
CAPACITOR
BL
1
2
START
RELAY
5
R
R
S
COMPRESSOR
C
W
TO RELAY
ENCLOSURE
B
EVAPORATOR WIRING
W
FAN
P
DRAIN LINE
HEATER
SOLENOID VALVE
P
COIL HEATERS (4x)
TEMPERATURE
SWITCH
R
FROM
CONTROLLER
FROM
CONTROLLER
NOTES:
1.
2.
•
•
•
•
•
•
SYMBOLS, DESIGNATIONS AND GENERAL
DRAWING METHODS ENGWI002.
LEGEND:
R = RED B = BLACK
BL = BLUE BR = BROWN
GR = GRAY G = GREEN
Y = YELLOW W = WHITE
O = ORANGE P = PURPLE
T = TAN / = WIRE TRACE
Appendix
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual
37
Appendix
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38
Installation, Operation and Service Manual Thermo Scientific XBF40 Series Blast Freezers
Appendix
11.7 12VDC
Control Power
Wiring Diagram
6 5 4 3
E
~230VAC LINE VOLTAGE
BL/O BL/O
-
12VDC POWER SUPPLY
+
D
B
Y
B/W
EVAPORATOR FAN RELAY COIL
B/W
C
1
DIXELL CONTROLLER
2 3 7
B/Y
COMPRESSOR CONTACTOR COIL
B/Y
B
B
R/B
DEFROST HEATER RELAY COIL
R/B
2 1
E
D
C
NOTES:
1.
2.
•
•
•
•
•
•
SYMBOLS, DESIGNATIONS AND GENERAL
DRAWING METHODS ENGWI002.
LEGEND:
R = RED B = BLACK
BL = BLUE BR = BROWN
GR = GRAY G = GREEN
Y = YELLOW W = WHITE
O = ORANGE P = PURPLE
T = TAN / = WIRE TRACE
B
A
A
6 5 4 3 2 1
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual 39
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40
Installation, Operation and Service Manual Thermo Scientific XBF40 Series Blast Freezers
Appendix
11.8 Service
Parts List
Table 3: Service Parts List
Part Number Description
325257H01
77037H01
77039H02
325324H01
325306H01
325372H01
326782H01
325423H01
315282H01
325269H01
325267H01
325241G01
326193H01
325243H01
325259H01
325244G01
325425H01
325426H01
325427H01
325428H01
315707H12
315146H21
315146H11
315599H03
325371H01
325370H01
Compressor Service Kit
Controller
Evaporator
Condenser
Suction Accumulator
Harness, Blast Freezer
Harness, Compressor, Blast Freezer
Harness, Evaporator, Blast Freezer
Harness, Ground
Start Relay
Start Capacitor
Run Capacitor
White board
White board/End Trim
White Board Cover/Frame
Thermostatic Expansion Valve
Fan Motor
Fan Blade
Condensate Pan
XJ485USB ‐ KIT (programming tool)
LABEL, XBF40
Label, XBF40‐MD
Grip, Cushioned, Slide‐on
Rocker Switch, 2 Pole, 240VAC, 20.0A
Condenser Fan Bracket
Condenser Fan Shroud
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual
41
Appendix
Table 3: Service Parts List
Part Number Description
314226H01
86416H06
80945H01
325251H01
325407G01
325252H01
326113H01
326659H01
326660H01
326661H01
326703H01
326707H01
325504H01
315096H04
315096H09
Filter/Dryer bracket
Filter/Dryer clamp
Accumulator bracket
Cabinet Spill Plate
WELD ASSEMBLY, DUMMY DOOR, BLAST FREEZER
Shelves
Dixell Controller Hot Key
HARNESS PLUG TO SWITCH
HARNESS,CONTROL HARNESS
HARNESS, DIXELL CONTROL HARNESS
HARNESS, SWITCH TO TSTRIPE & CONNECTOR
Harness, solenoid heater relay
Power Cord
OUTER GASKET, OUTER DOOR
INNER GASKET, OUTER DOOR
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Installation, Operation and Service Manual Thermo Scientific XBF40 Series Blast Freezers
11.9 Dixell
Control
Parameter and
Defaults
(Factory Default
Settings)
Group
Other
Regulation
Regulation
Regulation
Probes
Probes
Probes
Probes
Probes
Probes
Probes
Regulation
Regulation
Table 4: Dixell Control Parameter and Defaults
Parameter Description
Factory
Default
Minimum Maximum
rtC
Hy
LS
US ot
P2P oE
P3P o3
P4P o4 odS
AC
Access to clock menu
Differential
Minimum set point
Maximum set point
Thermostat probe calibration
Evaporator probe presence
Evaporator probe calibration
Third probe presence
Third probe calibration
Fourth probe presence
Fourth probe calibration
Outputs delay at start up
Anti-short cycle delay
0
4
-40
-30
0 yes
0 no
0 no
0
1
5
1
-100
-40
-12
-12
-12
-12
0
0
25
-40
150
12
12
12
12
255
50
°C
°C
°C
°C
°C
°C
°C
Unit
Minutes
Minutes
Appendix
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual
43
Appendix
Regulation
Regulation
Regulation
Regulation
Regulation
Regulation
Regulation
Defrost
Defrost
Defrost
Defrost
Regulation
Regulation
Regulation
Regulation
Defrost
Defrost rtr
CCt
CCS
Con
CoF
CF rES
Lod rEd dLy dtr
EdF tdF dFP dSP dtE dtS
Table 4: Dixell Control Parameter and Defaults
P1-P2 percentage for regulation
Continuous cycle duration
Set point for continuous cycle
100
0.00
0
Compressor ON time with faulty probe 255
Compressor OFF time with faulty probe 0
Temperature measurement unit °C
Resolution
Probe displayed in
P1
X-REP display P1
Display temperature delay 0.00
P1-P2 percentage for display
Defrost mode
99 rtC
Defrost type
Probe selection for first defrost
EL
P2
Probe selection for second defrost P2
Defrost termination temperature first defrost
Defrost termination temperature second defrost
10
10
0
0
1
0
-100
-55
-55
100
150
255
255
99
50
50
44
Installation, Operation and Service Manual
Hours
°C
Minutes
Minutes
Minutes
°C
°C
Thermo Scientific XBF40 Series Blast Freezers
Defrost
Defrost
Defrost
Defrost
Defrost
Defrost
Defrost
Defrost
Defrost
Fan
Fan
Fan
Fan
Fan
Fan
Fan
Auxiliary
Auxiliary
FAP
ACH
SAA
FCt
FSt
Fon
FoF idF
MdF
MdS dSd dFd dAd
Fdt dPo dAF
FnC
Fnd
Table 4: Dixell Control Parameter and Defaults
Interval between defrost cycles
(Maximum) length for first defrost
8
30
(Maximum) length for second defrost 30
Start defrost delay 0
Displaying during defrost rt
Max display delay after defrost 0
Draining time
First defrost after start-up
5 no
Defrost delay after fast freezing 0.00
Fan operating mode
Fan delay after defrost
O_n
0
Differential of temperature for forced activation of fans
Fan stop temperature
Fan on time with compressor off
Fan off time with compressor off
Probe selection for fan
Kind of action for auxiliary relay
Set point for auxiliary relay
0
50
0
0
P2
CL
100
0
0
0
0
0
0
0
0
-55
0
0
-100
120
255
255
255
255
255
255
50
50
15
15
150
Minutes
Minutes
Hours
°C
Hours
Minutes
Minutes
Minutes
Minutes
°C
°C
Minutes
Minutes
Appendix
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual 45
Appendix
Alarm
Alarm
Alarm
Alarm
Alarm
Alarm
Alarm
Alarm
Auxiliary
Auxiliary
Auxiliary
Alarm
Alarm
Alarm
Alarm
ALC
ALU
ALL
AP2
AL2
AU2
SHy
ArP
Sdd
ALP
AFH
ALd dAo
AH2
Ad2
Table 4: Dixell Control Parameter and Defaults
Differential for auxiliary relay
Probe selection for auxiliary relay
1
P1
Auxiliary relay switched off during defrost no
Probe selection for temperature alarms P1
Temperature alarms configuration Ab
Maximum temperature alarm -10
Minimum temperature alarm -50
Differential for temperature alarm recovery 4
Temperature alarm delay
Delay of temperature alarm at start up
15
2.00
Probe selection for condenser temperature alarms nP
Condenser low temperature alarm -4
Condenser high temperature alarm 150
Differ. for condenser temp. alarm recovery 10
Condenser temperature alarm delay 15
1
-50
-100
1
0
-100
-100
1
0
25
150
-10
25
255
150
150
25
255
°C
°C
°C
°C
Minutes
Hours
°C
°C
°C
Minutes
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Installation, Operation and Service Manual Thermo Scientific XBF40 Series Blast Freezers
Alarm
Alarm
Alarm
Alarm
Configuration
Alarm
Digital inputs
Digital inputs
Digital inputs
Digital inputs
Digital inputs
Digital inputs i1P i1F i2P i2F did doA tbA oA3
AOP
Digital inputs
Digital inputs dA2 bLL
AC2 nPS
OdC
Alarm rrd
Energy Saving
Other
HES
Hur
Appendix
Table 4: Dixell Control Parameter and Defaults
Delay of condenser temper. alarm at start up 1.30
Compressor off for condenser low temperature alarm no
Compressor off for condenser high temperature alarm no
Alarm relay switched off by pushing a key yes
Third relay configuration AUS
Alarm relay polarity CL
Digital input 1 polarity
Digital input 1 configuration
Digital input 2 polarity
Digital input 2 configuration
OP dor
CL
ES
Digital input 2 alarm delay
Door alarm delay
15
3
Number of activation of pressure switch
Compress and fan status when open door
Regulation restart with door open alarm
Differential for
Energy Saving
Hour
0
FAn no
0
0
0
0
0
255
255
15
Hours
Minutes
Minutes
-30 30 °C
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual 47
Appendix
Defrost
Defrost
Defrost
Defrost
Defrost
Defrost
Defrost
Defrost
Energy Saving dLE
Energy Saving iSE
Energy Saving dSE
Defrost
Defrost
Ld1
Ld2
Sd1
Sd2
Sd3
Sd4
Ld3
Ld4
Ld5
Ld6
Other
Other
Regulation
Regulation
Min dAY
Hd1
Hd2
Energy Saving iLE
Table 4: Dixell Control Parameter and Defaults
Minutes 0
Day of the week
First day of week end
0 nu
Second day of week end
Working days
Energy saving start time nu
0.00
Working days
Energy saving duration
Holiday Energy saving start time
Holiday Energy saving duration
1st working days defrost start time
2nd working days defrost start time
3rd working days defrost start time
4th working days defrost start time
0.00
0.00
0.00
7.00
15.00
23.00
5th working days defrost start time
6th working days defrost start time nu nu
1st Holiday defrost start time
2nd Holiday defrost start time
6.00
14.00
3rd Holiday defrost start time
4th Holiday defrost start time nu
20.00
nu
Hours
Hours
Hours
Hours
Hours
Hours
Hours
Hours
Hours
Hours
Hours
Hours
Hours
Hours
48
Installation, Operation and Service Manual Thermo Scientific XBF40 Series Blast Freezers
Defrost
Defrost
Other
Probes
Configuration
Other
Other
Other
Other
Sd5
Sd6
Adr
PbC
OnF dP1 dP2 dP3 dP4
Other
Other
Other rSE rEL
Ptb
Appendix
Table 4: Dixell Control Parameter and Defaults
5th Holiday defrost start time
6th Holiday defrost start time
Serial address
Kind of probe
On/off key configuration
Probe 1 value
Probe 2 value
Probe 3 value
Probe 4 value
Real Set point
(SET + ES +
SETd)
Firmware Release
Map code nu nu
1
Pt1
OFF
0
0
0
0
0
0
11
1
0
247
65535
Hours
Hours
Thermo Scientific XBF40 Series Blast Freezers Installation, Operation and Service Manual 49
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Table of contents
- 6 Specifications
- 6 Dimensions
- 6 Power Requirements
- 6 Environmental Operating Conditions
- 6 Refrigerant Types and Charges
- 7 Safety Precautions
- 8 Unpacking
- 10 Installation
- 10 Location
- 10 Leveling
- 10 Wiring
- 11 Door Seal
- 12 Installing a Drain Line (Optional)
- 12 Final Checks
- 13 Operation
- 13 Temperature Settings
- 13 Start Up
- 15 Loading
- 15 Operation
- 15 Adjusting Shelves
- 16 Maintenance
- 16 Cleaning the Cabinet
- 16 Cleaning the Condenser
- 17 Cleaning the Condenser Filter
- 17 Manual Defrost
- 18 Drain Maintenance
- 19 Troubleshooting
- 21 Warranty (Domestic)
- 22 Warranty (International)
- 23 Quick Start Guide
- 23 Operating Specifications
- 23 Front Panel Keys
- 24 Key Combinations
- 24 LED Descriptions
- 25 Alarm Signals
- 25 Silencing Audible Alarm
- 25 Setting the Real Time Clock
- 25 Manually Engage a Defrost Cycle
- 26 Changing the Set Point
- 26 Changing the High/Low Alarms
- 26 Changing the Auto Defrost Cycle
- 28 Appendix
- 28 Theory Of Operation
- 30 and Troubleshooting
- 33 Troubleshooting
- 36 Repairing Leaks
- 37 Compressor Replacement
- 42 230VAC Chassis Power Wiring Diagram
- 44 12VDC Control Power Wiring Diagram
- 45 Service Parts List
- 47 Default Settings)