QBD COOLING SYSTEMS INC.
31 Bramsteele Rd, Brampton, Ontario, Canada L6W 3K6
1-800-663-3005 TEL : (905) 459-0709 FAX: (905) 459-1478
QBD.COM info@qbd.com
R-290 COOLERS (HC SERI ES)
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
CAUTION
READ THIS MANUAL BEFORE INSTALLATION, OPERATION AND/OR
SERVICING YOUR COOLER.
V2.5 01-2017
Publication: 47-0480-189 B
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
QBD COOLING SYSTEMS INC.
QBD.COM
Contents
1. DISCLAIMER .......................................................................................................................................................................................... 3
2. GENERAL INSTRUCTIONS ............................................................................................................................................................... 5
3. SYMBOLS USED IN THIS MANUAL .............................................................................................................................................. 6
4. INTENDED USE ..................................................................................................................................................................................... 7
5. R290 REFRIGERANT .......................................................................................................................................................................... 7
6. FIRST AID MEASURES FOR R-290 ............................................................................................................................................... 8
7. INSPECTION UPON DELIVERY ...................................................................................................................................................... 8
8. VISUAL CHANGES TO CD 3.0 .......................................................................................................................................................... 9
9. ELECTRICAL SAFETY ....................................................................................................................................................................... 11
10. RECOMMENDED ELECTRICAL PARTS FOR HC COOLERS .............................................................................................. 13
11. INSTALLATION ................................................................................................................................................................................... 14
12. CASTER INSTALLATION ................................................................................................................................................................. 15
13. SHELF INSTALLATION .................................................................................................................................................................... 15
14. COLD CONTROL ................................................................................................................................................................................. 16
15. WIRING DIAGRAM FOR CDxxHC & DCxxHC COOLERS ..................................................................................................... 18
16. LED LIGHTING .................................................................................................................................................................................... 19
17. COOLING DECK REMOVAL, ACCESS AND RE-INSTALL .................................................................................................... 20
18. HC MODEL DOOR REVERSAL AND ADJUSTMENT ............................................................................................................. 21
19. PREVENTIVE MAINTENANCE AND CLEANING INSTRUCTIONS ................................................................................. 23
20. REPLACE VS REPAIR FOR COOLING DECK 3.0 .................................................................................................................... 24
21. SAFETY INSTRUCTIONS FOR SERVICE, MAINTENANCE AND HANDLING OF QBD HC COOLER .................. 24
22. RECOMMENDED SERVICE PROCEDURES FOR HC COOLER .......................................................................................... 26
23. GUIDELINES FOR TROUBLE- SHOOTING ............................................................................................................................... 28
24. FREQUENTLY ASKED QUESTIONS ............................................................................................................................................ 30
25. QBD CONTACT INFORMATION ................................................................................................................................................... 31
2
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
QBD COOLING SYSTEMS INC.
QBD.COM
1. DISCLAIMER
Please read this manual carefully before
installing, operating and servicing this QBD
R-290 Hydrocarbon cooler. Improper
installation, operation and maintenance of
cooler can cause damage to the cooler, fire,
explosion, severe injuries or death.
This manual must be kept in an accessible
location for easy reference during
installation, operation, maintenance and
service.
QBD neither assumes nor authorizes any
representative or other person to assume
for it any obligation or liability in connection
with the QBD product, its sale, operation or
use other than such as is expressly set forth
herein.
derivatives sustained in connection with
the Product, its sale, operation or use.
c) glass (Door & Side Window) or light
bulb breakage (Fluorescent Tubes or
Light Bulbs), castors, hinges, magnetic
gasket, sliding door wheels, (Header &
Header Lens),door tracks, decals,
(Power Cord, Starters) and parts of
normal wear and tear.
d) any product that has been subject to
misuse, neglect, alteration, tampering,
accident, or to any damage to any
product caused during transportation,
improper installation (except when the
Product is installed by employees of
QBD), flood, fire, water damage,
burglary, terrorism or acts of God.
Exclusions from Warranty Coverage
QBD warranty does not cover:
a) Spoilage of products, loss of sales,
incidental, indirect, consequential or
special damages, or any injury, loss,
cost or expense directly or indirectly
sustained in connection with the
Product, its sale, operation or use.
b) without limiting the generality of the
foregoing, spoilage of products, loss of
sales, incidental, indirect, consequential
or special damages, or any injury, loss,
cost or expense arising directly or
indirectly from fungi or fungal
Limited Warranty
QBD warrants to the original purchaser at
the location of original installation of the
Product that the Product is free from defects
in material or workmanship under normal
use and service for a period as defined in
warranty terms from the date of shipment.
QBD’s obligation under this warranty shall
be limited to repairing or replacing at QBD’s
option, any part of such product, which
proves thus defective and which upon
examination by QBD and to its satisfaction
to be defective shall be determined to be
defective. Notwithstanding this assumption
3
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
! CAUTION
1. The cooler contains flammable
refrigerant R-290 (Propane). To
confirm refrigerant type, please refer
serial label inside cabinet.
2. The cooler requires adequate ventilation
at all times during installation, operation
and servicing.
3. In order to carry out service and repair
on R-290 COOLER the service
personnel must be qualified and
trained to handle flammable
refrigerants. This includes knowledge
on tools, transportation of the
compressor and refrigerant, relevant
regulations and safety precautions.
Also, service must be performed in a
well-ventilated area and in compliance
with the local/ regional /national safety
codes.
4. Conversions from refrigerant R134A
to R-290 is NOT allowed. Using R-290
in a system, which is not approved and
does not have symbols indicating use of
R-290, may cause fire, explosion,
severe injury or death.
5. As per the EPA, R-290 is prohibited for
retrofitting in existing hydrofluorocarbon
(HFC) refrigerant systems.
6. Only a maximum 150 grams (5.3 oz.) of
R-290 charge is allowed in any HC
based beverage cooler refrigeration
system. (Ref: UL#471). However you
are advised to refer serial plate to
check R-290 charge amount in your
cooler. Refrigerant overcharge may
lead to fire, explosion, severe injury
or death.
7. EPA has approved the venting of
Hydrocarbon refrigerant into the
atmosphere. However, it is
recommended that you observe venting
requirements in your jurisdiction. Use
extreme precaution while venting- refer
paragraph 9 on page 26 for more
instructions on safe venting practices.
QBD COOLING SYSTEMS INC.
QBD.COM
of responsibility by QBD, QBD’s
responsibility for the costs and labour
incurred in repairing or replacing the
Product shall not exceed the sale price of
the Product. The labor warranty shall
include standard straight time labor charges
only and reasonable travel time, as
determined by QBD.
For CD Series coolers, QBD reserves the
right to exchange the cooling deck, and the
defective cooling deck must be returned.
Labor charges to remove and install the
cooling deck, is not covered by warranty.
4
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
8. R-290 cooling deck must be installed
in R-290 certified cabinet only. Only
cabinets with serial plate indicating
R-290 should be used for R-290
based refrigeration system. R-290
installation on a non-approved cabinet
may result into fire, explosion, severe
injury or death.
9. Check for refrigerant leak before
connecting or disconnecting power to
cooler.
10. Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this cooler.
11. Smoking is strictly prohibited near
coolers with R-290 refrigerant.
12. Ensure the cooler, refrigerant, oil and/or
other component(s) are disposed in
accordance with local and federal
regulations.
13. To maintain average product
temperature at 3.3°C (38°F), follow
temperature setting as indicated on
rating plate inside the cooler. Any
change in setting could result in poor
performance and/or component(s)
failure.
14. QBD will not be responsible for poor
performance, component failure(s),
damages or losses due to improper
installation of the cooling deck, electrical
components, cooler itself, and/or use of
non-OEM parts.
15. Use of NON OEM parts is strictly
prohibited. Use of non OEM parts will
not only void the warranty but may also
lead to a major fire or explosion causing
property damage, severe personal injury
or even death.
All repairs must be performed by a
trained and authorized service
technician and at a safe environment.
QBD COOLING SYSTEMS INC.
QBD.COM
2. GENERAL INSTRUCTIONS
Unsafe use of the cooler other than
intended by QBD can result in death,
serious injury, property damage and /or
cooler failure.
This manual contains important information
about cooler safety and maintenance.
READ and UNDERSTAND this manual
before operating the cooler. If you have any
questions, please call QBD (Contact
number (905)-459-0709) for clarification.
This manual must remain near the cooler
and should be available to all users and
service technicians.
All specifications are subject to change
without notice.
5
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
This sign will indicate that
you are handling a
flammable substance that
may be present in the
surrounding environment.
WARNING Indicates
potentially hazardous
situation which, if not
avoided, may result in
injury, property damage
and/or cooler failure.
DANGER Indicates
potentially hazardous
situation which, if ignored,
could result in death or
serious injury, property
damage and/or cooler
failure.
!
CAUTION emphasise
information which may
cause cooler failure or
environmental harm.
This label is used to indicate
that the flammable
refrigerant (R-290) is
present within the
application and service
equipment
Images that indicate
something that should be
strictly avoided
Specific bans!
Instructions for first aid!
Fire protection!
QBD COOLING SYSTEMS INC.
QBD.COM
3. SYMBOLS USED IN THIS
MANUAL
6
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
Odor:
Odorless
Chemical formula:
C3H8
Appearance:
Liquefied
compressed gas
Boiling Temp.:
-42°C (460mm/Hg)
Flash point temp:
−104 °C
Self-ignition
temperature :
470°C (Under 760
mm/Hg)
Lower Explosive
Limit (LEL) :
2.30%
Upper Explosive
Limit (UEL) :
9.50%
Density:
580 Kg/m3 (25°C)
QBD COOLING SYSTEMS INC.
QBD.COM
4. INTENDED USE
QBD`s coolers are designed for storage of
beverage products and/or commercial
merchandise.
Storage of pharmaceutical products (unless
it is an RX-series cooler), perishable food,
scientific material or temperature sensitive
product in the cooler is NOT
RECOMMENDED.
QBD warranty does not cover spoilage of
products, loss of sales, incidental, indirect,
consequential or special damages, or any
injury, loss, cost or expense directly or
indirectly sustained in connection with the
Product, its sale, operation or use.
This cooler is NOT intended for
outdoor use or to be subjected to
direct sunlight, dampness, high dust
levels, extreme heat and/or cold
temperature. Ensure adequate
ventilation around the cooler.
5. R290 REFRIGERANT
This cooler contains R-290
refrigerant. It is highly
flammable and is heavier
than air and the
concentration will always
be highest at floor level.
It should not be subjected to
temperature more than 90°F and relative
humidity more than 65%.
7
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
Ingestion
DO NOT induce vomiting unless directed to
do so by medical personnel. Never provide
anything by mouth to an unconscious
person. Get medical attention if symptoms
persist.
Skin Contact
In case of contact, immediately flush skin
with plenty of water. Remove contaminated
clothing and shoes. Wash clothing before
reuse. Thoroughly clean shoes before reuse.
Get medical attention.
Eyes
Immediately flush eyes with plenty of water
for at least 15min. Get medical attention.
Frostbite
Try to warm up the frozen tissues and seek
medical attention.
Inhalation
Immediately move to area with fresh air. If
breathing has stopped, give artificial
respiration. If breathing is difficult, qualified
personnel may give oxygen. Get medical
attention.
QBD COOLING SYSTEMS INC.
QBD.COM
6. FIRST AID MEASURES FOR R-
290
Material Safety Data Sheet
(MSDS) of R-290 (Propane)
is required to be available to
all users and employees at
the installed sites. It is
mandatory for users to refer to MSDS for
complete understanding of hazards and
take necessary precautions.
7. INSPECTION UPON DELIVERY
Your cooler contains R-290 refrigerant. For
safety, examine all packaging material for
damage when received. Damage to external
packaging may have resulted in unit
damage.
If you received a damaged cooler, refuse
the shipment and immediately contact the
carrier to report the incident.
Unpack the cooler. Check cooler for all
accessories and components, including
legs, casters (if applicable) and shelves.
All goods are shipped at the customer’s risk.
Return of goods to the factory must have
the authorized approval from QBD.
No returns will be accepted after 10 days.
Any shortage claims must be made within 5
days of receiving the goods.
If the cooler is tilted during
transportation/relocation please allow it to
sit for 2 hours in upright position before
connecting to power source. Ensure the
cooler is not damaged during transportation.
Follow all local/regional codes
for transportation or relocation
of hydrocarbon coolers.
Refer to updated MSDS for more details.
8
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
Technicians are responsible to ensure these red sleeves are
always present on access points as per UL#471 requirement.
QBD COOLING SYSTEMS INC.
QBD.COM
8. VISUAL CHANGES TO CD 3.0
9
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
All QBD Hydrocarbon coolers are provided with multiple
identification and hazard labels. These can be located
inside the cabinet and other visible surfaces of the
cooler. Please contact QBD technical support for more
information.
QBD COOLING SYSTEMS INC.
QBD.COM
10
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
QBD COOLING SYSTEMS INC.
QBD.COM
outlet is effectively grounded. If only an old
9. ELECTRICAL SAFETY
The cooler must always be plugged into its
own dedicated individual electrical circuit,
which has a voltage rating same as
mentioned on the serial plate, and is in
compliance with the Canadian Electrical
Code, Part I, the National Electrical Code or
the local Electrical Code.
Ensure that a dedicated 3-prong grounded
electrical receptacle is available at the
intended location of the cooler.
Ensure that the electrical branch circuit of
the fixed wiring to the dedicated receptacle
is protected with a fuse or a circuit breaker.
two-prong wall outlet is available, it is the
user’s responsibility and obligation to have it
replaced with an effectively grounded threeprong wall outlet for protection against
potential electrical shock and fire hazard.
DO NOT USE EXTENSION CORDS,
POWER BARS, AND / OR WIRING
DEVICE ADAPTERS TO POWER THE
COOLER.
Inspect the cooler power supply cord for any
damage prior to use. Do not use a cord that
is damaged or have crack signs. If power
cord is damaged, it must be replaced with
QBD supplied OEM part only. Do not alter
impact or apply pressure on power cord.
For personal safety, this appliance must be
effectively grounded at all times. The power
cord of this cooler is equipped with a threeprong (grounding) plug which mates with a
standard three-prong (grounding) wall outlet
(receptacle) to minimize the possibility of
electric shock hazard from this cooler.
Have the wall outlet and circuit checked by
a qualified electrician to make sure the
Don’t access electrical parts & mechanically
moving parts without authorization and this
should be done by a qualified service
technician only.
11
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
QBD COOLING SYSTEMS INC.
QBD.COM
CAUTION
Always check for Hydrocarbon leak
(using a certified hydrocarbon leak
detector) before plugging / unplugging/
or switching ON-OFF power supply.
CAUTION
When working on the equipment or
parts thereof, the system has to be deenergized (by master switch, circuit
breaker or separate cut-out) and
unplug power cord, such that it cannot
be restarted accidentally. Do not
reconnect the system to the electric
circuit until all work is completed and all
connections are tested.
CAUTION
All units must be powered at their
nominal operating voltages at all times.
The voltage should be within 10% of the
nameplate voltage rating, as overvoltage
or under voltage could damage the cooler.
QBD is not responsible for the repair or
replacement of failed or damaged
components resulting from electrical
power failure, incorrect supply voltage,
low voltage, or unstable supply voltage.
Ensure that the power quality (i.e. the
voltage and current harmonics) are
within the acceptable industry tolerance.
CAUTION
Please do not spray or immerse any
electrical component with water and/or
chemicals. Doing so may will void all
warranties and may lead to fire,
explosion, severe injury or death.
Always use QBD supplied OEM
components only which are approved and
certified to be used in coolers using R290.
Consult QBD technical service (Contact
number (905)-459-0709) for details on
wiring diagram, or other electrical
components.
12
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
CONTROLLER
Please contact QBD Technical support
for more information on controller for your
particular cooler.
ECM MOTORS
UL Approved / Very High
Efficiency / Brushless / Wider
operating range
ELECTRICAL CONNECTORS
USE OEM PARTS ONLY
COMPRESSOR
RELAY/OVERLOAD/
CAPACITOR
USE OEM PARTS ONLY
LED POWER SUPPLY
Approved for Hydrocarbon / Class
2 Type Power supply: 12V DC /
High Energy Efficiency
LED+ Lighting
up-to 50% more product
illumination
QBD COOLING SYSTEMS INC.
QBD.COM
10. ELECTRICAL PARTS FOR HC COOLERS
Always use QBD supplied OEM parts only. Use of non-OEM parts will not only
void the warranty but may also lead to a fire, explosion, serious injury or death.
Below is just to demonstrate some examples of difference in parts used in non R-290 vs
R-290 systems.
13
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
- Clearance
- Inches
- Side wall
- 1/2
- Rear wall
- 1/2
- Front glass
- 1
QBD COOLING SYSTEMS INC.
QBD.COM
- Minimum INTERNAL clearances are
11. INSTALLATION
LOCATION & LEVELING— INDOORS
ONLY!
- Cooler must be leveled front to back and
side to side to ensure optimum
performance. Use leg -adjust for proper
leveling.
- Improper leveling may cause cooler
door(s) to not close properly. This can
cause the evaporator coil to accumulate
frost and/or drain pan to overflow.
required for adequate air circulation
inside the cooler. Maintain internal
clearances between the beverages and
the cooler walls and door(s) as follows :
EXTERNAL AND INTERNAL
CLEARANCES, SHELF POSITION AND
DOOR SUPPORT BRACKETS
- Always maintain the following
EXTERNAL clearances for ease of
installation, door opening and proper air
circulation:
o Top .............….........2”
o Hinge Side............. 1 1/4”
o Non Hinge Side...... 1/2”
o Back...................... 3”
- Maintain a clearance of at least 2 feet in
front of the grill to ensure free air flow
from the refrigeration unit.
- Cooler is designed for freestanding
installation only. It should not be
recessed or built-in.
- Don’t locate cooler in close proximity to
high heat appliances such as fryers,
heating ranges and / or heating ducts.
- MUST remove the door support
bracket(s) before installation.
(applicable for specific models only)
- ALWAYS use the door support
bracket(s) during transport and/or
changing locations.
14
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
QBD COOLING SYSTEMS INC.
QBD.COM
12. CASTER INSTALLATION
The cooler has a new design for caster
installation. It does not require a transfer
plate anymore.
Nut insert (to fit casters) is flush with the
bottom surface of base channel. This design
will allow caster top in firm contact with
cooler base channel. Hence, transfer plate
can be avoided.
- DC6/DC7 models have option for
adjustable leg too.
13. SHELF INSTALLATION
- Cooler shelves (flat or gravity) and a
bag containing shelf support clips are
packed at the factory inside the unit.
- In CD HC models (except CD10/12/20
HC), a bottom shelf must be installed on
top of the base step (return air duct).
No Transfer plate required as caster top is
directly in contact with the vase channel
plate. Shim plate may be required for
leveling of cooler.
IMPORTANT NOTE:
- QBD does not offer casters for PC8**
/PC8L** models Do not use any third
party casters kits. For safety and
stability of the cooler, only use the
supplier levelling legs.
- Don’t adjust the levelling legs beyond a
Maximum Height of 1/2`` (1/2 inch) on
PC8xx coolers.
- Improper shelf clip installation may
cause shelf and/or product to fall which
could result in personal injury or
damage to the cooler.
- Do NOT place solid packages on bottom
shelf to avoid poor cooling performance.
15
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
QBD COOLING SYSTEMS INC.
QBD.COM
- Don’t overload the shelves. The cooler
is designed to use all the shelves
provided. Install in equally spaced
configuration. If fewer shelves or a
different configuration is required,
contact QBD to ensure that shelf
overloading will not occur.
- Store products as evenly as possible
inside the cabinet to maintain uniform
product temperature.
14. COLD CONTROL
Different cold controls are being used in
different models of HC coolers. All these are
certified for use in an HC unit. Please
contact QBD technical support to know
more about cold control for your unit.
All cooling deck based HC coolers are
equipped with customized CAREL cold
control (QBD Part # 47-0520-255). The
recommended setting is at #5 which will
allow the cooler to operate between 3842°F. Temperature probe should be in the
return air section.
This controller features voltage protection,
automatic defrost and energy saving logics.
DISPLAY INDICATORS
This indicates the Evaporator Motor(s)
is/are running but the Compressor is off. On
initial power up, there is an intelligent delay
for protection of the Compressor. Power to
the Compressor will initiate after one (1)
minute.
This is the typical look of the CAREL
controller while in use. "USE" indicates the
unit is in working order. The symbols to the
left of "USE" indicate that the Compressor
and Evaporator Motor(s) are both running. If
the Compressor Indicator is blinking, the
compressor is under "Time Protection".
DEFROST CYCLE
Indication that unit is in DEFROST cycle.
Evaporator Fan Motor(s) is/are ON for 4
minutes and OFF for 1 minute during this
cycle. To manually initiate the defrost cycle,
push and hold the "WARMER" button for 3
seconds. The controller will automatically
come out of DEFROST after 20 minutes. To
manually end the defrost cycle, push the
"WARMER" button for 3 seconds.
Second picture is the indication that unit is
in DEFROST MODE and Evaporator
16
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
QBD COOLING SYSTEMS INC.
QBD.COM
Motor(s) will be running. There is an
automatic defrost cycle of 20 minutes every
6 hours.
This is the indication that the cold control is
"OFF" and power to the Compressor and
condenser fan motor has been disabled.
Power to Evaporator Motor(s) is still live. To
manually turn the controller "OFF", push
and hold the "COLDER" (upper) key for 3
seconds. To turn back "ON", push and hold
the "COLDER" (upper) button for 3 seconds
This is the indication that an ERROR has
occurred with the probe. Either the probe is
faulty or it has been disconnected from the
controller.
CHANGE THE TEMPERATURE SETTING
Check controller temperature setting.
Proper setting should be #5 on CAREL
Controllers. Push the "WRENCH" button for
3 seconds to get to the settings mode. Use
the "COLDER" or "WARMER" buttons to
adjust to the desired setting. To save the
new setting, you MUST push and hold the
"WRENCH" button for 3 seconds or until the
controller returns to "USE".
- QBD doesn't recommend any
temperature setting change without prior
authorization.
- Cold control is set at #5 for beverage
storage. Cooler maintains average
product temperature of 3.3°C (38°F).
- Cold control follows an automatic
defrost cycle every six hours for 20 min.
- Evaporator fan follows a defined logic (4
minutes ON and 1 minute OFF) during
compressor OFF cycle and defrost cycle
for optimum energy conservation.
Other HC coolers have mechanical (QBD
Part # 47-0430-257, 47-0430-258) or
electronic Danfoss cold control (QBD
Part # 47-0430-206).
Please contact QBD technical support
(phone number 905-459-0709) to confirm
the right controller for your cooler.
The temperature control dial has settings
from 1 to 9 plus “OFF” or “O”.
1 is the warmest setting.
9 is the coldest setting.
Initially set the temperature to the
recommended setting shown on the cabinet
serial-name plate, this setting is for ambient
condition of 75º F (±2°F). For every 5
degree rises in ambient temperature the
17
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
QBD COOLING SYSTEMS INC.
QBD.COM
control setting should be moved 1 digit warmer (backwards).
After using the cooler for 24 hours, adjust
the temperature control to the setting that is
best suited for your needs.
NOTE : If the cooler is unplugged or turned
off, you must allow 5 minutes before starting
it or plugging it back in. If you attempt to
USE OF NON-QBD REPLACEMENT PARTS WILL VOID THE WARRANTY. PLEASE
CONTACT QBD (Tel: 905-459-0709) TO CONFIRM MOST CURRENT PART NUMBERS
restart it in less than 5 minutes, it may not
restart and it may damage the compressor
and VOID WARRANTY. Turning the
temperature control dial to “OFF” or “O”
stops cooling but does not shut off power to
the cooler.
15. WIRING DIAGRAM FOR CDxxHC & DCxxHC COOLERS
Ref No#47-0040-532
18
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
QBD COOLING SYSTEMS INC.
QBD.COM
Please call QBD service for additional information if required. Check for refrigerant leak before
connecting or disconnecting power to unit.
16. LED LIGHTING
- All HC coolers are installed with customized LED+ lighting for maximum product
illumination, high energy efficiency and convenient replacement option.
- Check for HC leak prior to disconnecting power. Do not use lights or light
connectors, which are not UL certified for R-290 coolers. This may also lead to a
major fire, explosion, severe injury or death..
19
Ref No#47-0040-533
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
QBD COOLING SYSTEMS INC.
QBD.COM
17. COOLING DECK REMOVAL, ACCESS AND RE-INSTALL
FOLLOW STEPS BELOW FOR COOLING DECK REMOVAL & RE-INSTALLATION
20
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
Loosen the two hold down screws of the front grill. Remove
front grill by lifting the grill vertically upward approximately ½”
until the grill is lifted free of the two keyhole slots and screws
that hold the grill in place.
Use a Philips type screwdriver to remove the top right bracket
while holding the door. If there is a shim under the bracket,
remove it too. Set the bracket aside but take care to hold the
door.
Open the door slightly and lift it up firmly. The spring would be
released at the bottom.
Place the door on a flat non-scratching surface. Interchange the
door’s top and bottom pivot pins by removing and fixing the two
screws. Do not disturb the door handle.
Remove the bottom right bracket and if there is a shim under the
bracket, remove it too.
Install the new bottom left hinge bracket on the left side (QBD
Part# 47-0090-015), before fully
tightening the two screws, mount the door spring onto the pin
on the back side of the hinge bracket.
Now fully tighten the screws.
Remove and re-insert the plastic plugs for the screw holes on
the cooler’s front face from the left side to the right side
holes.
Set the door on the cabinet through the bronze bushing in the
bottom hinge bracket.
QBD COOLING SYSTEMS INC.
QBD.COM
- Don’t pull or apply pressure on suction line.
- Ensure locking bar is re-positioned after installation.
- Maintain clean coil and clear drain lines
18. HC MODEL DOOR REVERSAL AND ADJUSTMENT
To position the door hinges from the right side (factory set) to the left for CD models:
21
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
Install the new left top hinge bracket to its new top left position.
(QBD Part # 47-0090-014)
Fix the door closing spring into the door pivot pin slot located at
the bottom left of the cabinet.
Pre-load the spring by giving one (1) full turn. Swing the door to
test the proper operation.
Remove the brand QBD logo from the bottom of the door and
refit at the right hand top corner of the door.
Install front grill.
QBD COOLING SYSTEMS INC.
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To position the door hinges from the
right side (factory set) of the cooler to
6. Remove the bottom bracket and shims if
applicable.
the left for Counter Top Model:
7. Remove the bronze inserts from the
1. Unplug the cooler and empty it.
bottom bracket and transfer it to the
other opening in the hinge.
2. Don’t remove the leveling legs
3. Use a Philips type screwdriver to
remove the top bracket while holding the
door. If there is a shim under the
8. Relocate the bottom bracket to the left
side. Remove the front block and rest
the cooler in the upright position. Don’t
alter the door handle.
bracket, remove it as well. Set the
bracket aside while continuing to
support the door.
9. Remove the door and place it on a flat
and smooth (none scratching) surface.
Interchange the top and bottom pivot
4. Open the door slightly and lift it firmly.
pins.
The spring will be released at the
bottom.
10. Remove the bronze insert from the top
bracket and transfer it to the other hole
5. Tilt the cooler approximately 6” to the
in the hinge.
back and block the lower front section to
create enough space to proceed to step
6.
USEFUL TIP: Easier to order and install a
new insert.
22
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
QBD COOLING SYSTEMS INC.
QBD.COM
11. Remove all the plastic screw plugs
(caps) on the left side and reinsert them
to cover the holes on the right side.
12. Reinstall the door by positioning the
lower pivot pin into the hole of the
bottom bracket with the bronze insert.
Attach the top left hand hinge to the top
pivot pin and screw bracket to the
cabinet.
13. Tilt cooler back (similar to step 5).
Position the spring under the bottom
bracket and turn the spring counter
clockwise for one full turn (for models
DC6/7) and attach the spring to the slot
in the pivot pin. Remove and reposition
any label and graphic if required.
14. Check door gasket for proper sealing
and alignment
19. PREVENTIVE MAINTENANCE
AND CLEANING INSTRUCTIONS
Interior-Exterior Cleaning (Cabinet)
- Check the area for any refrigerant leak
before connecting or disconnecting
power to unit.
- Remove all products and shelves.
- Never use acids, chemical thinner,
gasoline, benzene or the like for
cleaning any part of the cooler. Boiling
water or benzene may deform or
damage plastic parts.
- Avoid using abrasive materials, scouring
powders or aggressive spray cleaners
which may damage the painted surfaces
of the cooler.
- Wipe inside of the cooler with damp
cloth and mild non-abrasive detergent.
Then dry with soft cloth.
- Clean the door gasket (s) and shelves
with mild detergent and dry with soft
cloth.
- To help prevent odors, leave open box
of baking soda inside the cooler and
replace every three months.
- Wipe exterior of the cooler with a soft
cloth dampened with soapy water.
Make sure the cooler is completely dry
before installing shelves.
PLEASE DO NOT SPRAY OR IMMERSE
ANY ELECTRICAL COMPONENT WITH
WATER AND / OR CHEMICALS. DOING
SO WILL VOID ALL WARRANTIES AND
MAY LEAD TO FIRE, EXPLOSION,
SEVERE INJURY OR DEATH.
23
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
QBD COOLING SYSTEMS INC.
QBD.COM
“LTC” (Lint Tolerant Condenser)
cleaning procedure:
It is recommended to clean the condenser
once a month or earlier based on
surrounding environment conditions.
- Remove all dust and debris from
condenser coil by using a wand type
duster, soft brush, vacuum cleaner or
compressed air if available.
- Failure to keep condenser coil clean and
unobstructed at all times will result in
inefficient or poor cooling. It may also
cause damage(s) to the cooler and void
the warranty.
Once all necessary servicing and/or
cleaning have been carried out, reverse the
above procedures to reinstall the cooling
deck. Please make sure you connect the
power supply, lift the handles, install the
locking bar and fasten the two screws (CD
coolers only).
Never use any sharp tool for
cleaning the condensing coil.
The cooler contains
flammable refrigerant.
20. REPLACE VS REPAIR FOR
COOLING DECK 3.0
Replace (swap) the cooling deck under the
following circumstances:
a. Compressor failure
b. Refrigerant leak
c. Damaged/broken base (platform)
Repair the cooling deck under the following
conditions:
d. Controller failure
e. Motor (condenser/evaporator)
malfunction
f. Damaged fan blade(s)
NOTE: Use only OEM parts for
replacement.
21. SAFETY INSTRUCTIONS FOR
SERVICE, MAINTENANCE AND
HANDLING OF QBD HC COOLER
This section covers maintenance and safety
aspects related to the handling of R-290
refrigeration systems. Note that the
requirements detailed under this manual are
not exhaustive but are intended as a guide
only. Additional precautions may be
required dependent upon the particular
equipment, application and conditions.
Practical Competence
Any person involved with working on or
breaking into an R-290 refrigerant circuit
24
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
QBD COOLING SYSTEMS INC.
QBD.COM
should hold a valid certificate from an
industry accredited authority.
General approach to handling of
Hydrocarbon Refrigerant
All flammable refrigerant gases when mixed
with air form a flammable mixture. The
effect of ignition of such a mixture can be
severe. It is therefore important that
appropriate safety requirements are
observed at all times when working with
flammable refrigerants.
Any equipment and tools (including
measuring equipment) used in the process
of repair must be suitable for use with R-290
refrigerant. Particular attention is to be paid
to the selection of the following:
- Refrigerant recovery units (no external
brushes)
- Refrigerant leak detector (non-sparking,
adequately sealed and intrinsically safe)
- Electric test meter
- Refrigerant recovery cylinder
- Portable lighting
If possible, it is recommended that the
cooler/cooling deck be removed from its
existing position to a controlled
workshop environment suitable to
conduct the repair safely.
minimized. Please comply with the following
precautions:
- Work Procedure:
Work shall be undertaken only under a
controlled procedure so as to minimize the
presence of flammable gas or vapor while
work is being performed. Prior to work
taking place the area surrounding the
equipment is to be surveyed to establish
any flammable hazards or ignition risks.
Display “NO-SMOKING” signs.
- General Work Area
All maintenance staff and personnel working
near the area should be notified as to the
nature of work being carried out. Work in
confined spaces should be avoided. The
area around the workspace is to be
sectioned off. Ensure that the condition
within the work area is safe and free of any
flammable materials.
- Checking for presence of Refrigerant
The area shall be checked with an
appropriate refrigerant detector prior to and
during work to ensure the technician is
aware of any potentially flammable
conditions.
Safety Checks
Prior to conducting maintenance or service
on R-290 coolers, perform all necessary
safety checks to ensure the risk of ignition is
! CAUTION
R-290 is the refrigerant used in this cooler
and it is odourless.
25
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
QBD COOLING SYSTEMS INC.
QBD.COM
Ensure that the leak detector equipment
being used is suitable for use with R-290
refrigerant, i.e. non-sparking, adequately
sealed and intrinsically safe.
Presence of a Fire Extinguisher
If any hot work is to be conducted on the
cooler or any associated parts, appropriate
fire extinguishing equipment shall be
available on hand. Make sure a dry powder
or CO2 fire extinguisher is available
adjacent to the charging area.
No Ignition Sources
Any person carrying out work on an R-290
refrigeration system, which involves
exposing any pipe work containing or has
contained flammable refrigerant, shall not
carry any sources of ignition in such a
manner that it may lead to the risk of fire or
explosion.
All possible ignition sources, including
cigarette smoking, should be sufficiently far
away from the site of installation, repairing,
removal and disposal during which R-290
refrigerant can possibly be released to
surrounding space.
If brazing or welding is required, this should
be performed in an area detached from the
cooler. If this is not possible, then the
system should be fully evacuated using
guidelines as outlined in QBD service
documents.
Ventilated Area
Ensure that the area is in the open or that it
is adequately ventilated before breaking into
the system. Ventilation should continue for
the duration of the work process. The
process should safely disperse any
released R-290 refrigerant to the
atmosphere.
Checks to the Refrigeration Equipment
Where electrical components are being
replaced, they are to be “fit for purpose” and
to the correct specifications. At all times the
manufacturer’s maintenance and service
guidelines are to be followed. If in doubt
consult QBD.
22. RECOMMENDED SERVICE
PROCEDURES FOR HC COOLER
If diagnosis indicate failure of any sealed
system component (e.g. compressor,
evaporator or condenser leak, partial
blockage, full/partial loss of refrigerant, etc.),
please follow recommended procedures
below:
Venting or Recovery
R-290 refrigerant recovery is not required
under SNAP but may still be called for
under other authorities, controls or
practices. Always follow local laws and
regulations for recovery or venting of
hydrocarbon refrigerant.
If the HC refrigerant is to be vented to the
atmosphere, either the unit should be
moved to a well ventilated area before the
26
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
QBD COOLING SYSTEMS INC.
QBD.COM
venting procedure begins or use hoses
long enough to discharge it safely to
outside environment.
- Attach gauges to both the high and low
sides of the system using an approved
method.
- To avoid accidental release of
refrigerant and lubricant, ensure that
they are recovered/ vented safely from
the system before removing the failed
component of the sealed system.
- Always recover the refrigerant from both
high and low sides of the system to
assure that no refrigerant is trapped in
the system.
- Purge the system with Oxygen Free Dry
Nitrogen (OFDN) several times to
ensure complete removal of refrigerant
from refrigeration system.
- Achieve a 500 micron vacuum in the
refrigeration system using a certified
vacuum pump before replacing failed
sealed system component(s).
- Use a tube cutter rather than a torch to
remove the failed component as shown
below. Using a torch may cause a fire
hazard, especially if the refrigerant has
not been completely discharged/
recovered. If you must use a torch to
remove the failed component of sealed
system, do so while running dry nitrogen
continuously through the system.
Always use OEM parts only. Use of nonOEM parts will not only void the warranty
but may also lead to a major fire,
explosion, severe injury or death.
Pressure Testing and Evacuation
- Pressurise the serviced refrigeration
system with oxygen free dry nitrogen
(OFDN) up to 150 psig.
- Hold the pressure and check for
possible leak.
- Purge OFDN before starting the
evacuation process.
- Never use a compressor to evacuate a
system. Use a certified vacuum pump
with manifold gauges and initiate
evacuation..
- The discharge of the vacuum pump
must be vented to an open-air area.
- Ensure the refrigeration system holds a
vacuum pressure of at least 100 micron
before charging.
- Never attempt to start the compressor
while the system is under vacuum.
- Always break a vacuum with refrigerant
charge before starting the compressor.
Charging refrigerant
- Do not overcharge the refrigeration
system (maximum 150 grams or 5.3
oz.) as per UL#471. Overcharging is a
safety hazard.
- Use only recommended type and
amount of refrigerant as indicated on the
serial label
27
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
Symptom
Possible Cause
Solution
Compressor starts and
runs but short cycles
on the overload
protector
- Excess current passing
through overload
- Low / unstable voltage
- Overload failed
- Capacitor fault
- Excessive discharge
- Suction pressure too high
- Compressor overheating
- Compressor electrical fault
- Check wiring diagram for wrong
connections of electrical components
- Check voltage supply
- Replace overload
- Replace capacitor
- Check for over charge or condenser
blockage / condenser fan failure
- Check refrigerant charge
- Replace compressor
Units runs OK but
short cycles
- Overload protection
- Incorrect thermostat setting
- Check the wiring
- Replace the overload
- Change the thermostat setting if
required
Warm temperature
- Too low control setting
- Inadequate air circulation
- Reset the controller to colder setting
- Improve air movement
QBD COOLING SYSTEMS INC.
QBD.COM
- Always use proper charging techniques
e.g.- using only certified and calibrated
weighting scales
Leak test
- Leaks inside or outside of a cooler may
result in a flammable mixture.
- Leak detection must be done using
electronic or ultrasonic leak detectors
calibrated for hydrocarbon refrigerants.
Sealing the process tubes
- Seal the process tube using an
- Improper sealing of the process tube
23. GUIDELINES FOR TROUBLE- SHOOTING
approved method or by pinching the
tubing with the recommended
equipment and then sealing it with
brazing material or silver solder.
may lead to leaks or a sudden
release of flammable refrigerant.
28
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
Blowing Fuse
- Power cord is cut and
grounding out
- Defective compressor
- Defective overload
- High Voltage
- Low Voltage
- Replace power cord
- Replace compressor
- Replace overload
- Correct voltage condition
- Ensure cooler plugged into dedicated
supply with properly sized circuit.
(Correct voltage condition)
Suction line frosted
- Evaporator fan not working
- Overcharged system
- Determine reason or replace if
required
- Correct the charge
Leaking water
- Very humid conditions
- Blocked drain
- Door not sealed properly /
top door seal
- Clear blocked drains
- Repair/replace door gaskets,
realign/seal doors
Evaporator freeze up
- Temperature controller set
too cold
- Blocked/restricted air flow
- Defective evap motor/
running at low speed
- Blocked drain
- Low refrigerant charge
- Open door or door not
sealed properly
- Defective or open gasket on
cooling deck
- Deck not in locked position.
- Adjust to higher temperature setting
(lower number)
- Remove source of blockage
- Replace evap motor
- Clear blocked drain
- Repair/recharge system
- Repair/seal air leaks. Replace
defective or damaged gasket
- Lock deck in position and secure
with locking bar
Controller
miscommunication
- Internal controller failure
- Voltage spike
- Replace controller & probe
QBD COOLING SYSTEMS INC.
QBD.COM
29
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
QBD COOLING SYSTEMS INC.
QBD.COM
24. FREQUENTLY ASKED
QUESTIONS
1. How do I know if a cooler is using R290 refrigerant?
A number of visual differences have
been made in coolers running on R-290.
Check for R-290 indication on Cooling
Deck and the serial plate of the cooler.
2. Do you need any specialized training
to service R-290?
Although it is not mandatory, we
recommend you to attend specialized
training for this. Contact Refrigeration
Service Engineers Society
www.rses.org for more details.
3. Can I retrofit any cabinet to HC/R-290
refrigerant?
NO. The EPA has ruled that the
retrofitting of any existing equipment is
prohibited. All potential spark producing
parts in the system, including those in
cabinet have to be UL certified. Any
negligence may also lead to a major fire,
explosion, severe injury or death.
4. Can I use/add light switches in R-290
cabinet?
NO. All electrical fittings must comply
with UL # 471 and must be explosion
proof. It is therefore recommended not
to add any electrical switch in the
cabinet. LEDs provided with the cooler
are compliant to UL#471 and must be
replaced with OEM parts only.
5. Can the same tools be used to
service a hydrocarbon cooler and an
R-134a/R-404A system?
Since refrigerant R-290 is highly
flammable, no spark producing tool can
be used with HC cooling system. More
details of recommended tools are
provided in this manual. Please check
with QBD technical support team if you
have any questions.
6. Can the same parts be used in a
hydrocarbon cooler and an R-134a/R404A system?
NO
7. Is there a maximum charge amount
for R-290 refrigeration systems?
YES. You can only have a maximum
charge amount of 150 grams (5.3
ounces) in HC refrigeration system.
8. Do I need to recover the R-290
refrigerant?
NO. It is not mandatory. Always follow
local laws and regulations for
recovery or venting of hydrocarbon
refrigerant.
9. Where can I get R-290 refrigerant?
You can source this refrigerant from an
HVAC supply house or a company that
sells gases and welding supplies.
Always make sure you are purchasing
“refrigerant grade propane R-290”.
30
- Always use QBD supplied OEM parts only. Use of non-OEM
parts will not only void the warranty but may also lead to a fire,
explosion, serious injury or death.
------------------------------------------------------------------------------------------
- Only trained and certified technician, for Hydrocarbon
systems, should service these coolers.
------------------------------------------------------------------------------------------
- Use extreme caution and follow all local/regional codes for
transportation or relocation of Hydrocarbon coolers.
QBD COOLING SYSTEMS INC.
QBD.COM
25. QBD CONTACT INFORMATION
31
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