BHC Series
Installation & Operations Manual
Master-Bilt Products
908 Highway 15 North
New Albany, MS 38652
Phone: (800) 684-8988
PN 295-90000
1
05-25-06
2
TABLE OF CONTENTS
INTRODUCTION………………………………….……………………………………………………………………4
STORE CONDITIONS…………………………….……………….…..…………………………………………….. 4
WARNING LABELS AND SAFETY INSTRUCTIONS………..…..……………………………………………… 5
PRE-INSTALLATION INSTRUCTIONS………………………..…..………………………………….…………… 6
Inspection for Shipping Damage…………………………………………………………….……………...6
INSTALLATION INSTRUCTIONS………………………………………………………………………………….. 6
General Instructions…………………………………………………………………………………………. 6
Mechanical ..…………………………………………………………………………………………………..6
Electrical…………...…………………………………………………………………………………………..7
Leg and Condensate Pan Installation..……………………………………………………………………..8
SERVICE INSTRUCTIONS …………………………………………………………………………………………8
TEMPERATURE SENSOR, DEFROST HEATER AND FAN MOTOR REPLACEMENT……………………. 8
DIXELL (XR60C) ELECTRONIC REFRIGERATION CONTROL .…………………………………………….…9
FINAL CHECK LIST…………………………………………………………………………………….…………….13
SENSOR PROBE ………………………………………………………………………………….……………….14
MASTER-BILT PART NUMBERS ……………………………………………………………………………….. 15
ACCESSORIES………………………………………………………………………………………………………. 16
SALE AND DISPOSAL …………………………………………………………………………………………….16
WIRING DIAGRAMS IHC………………………………………….……………………….………………………...17
3
INTRODUCTION
Thank you for purchasing a Master-Bilt cabinet. This manual contains important instructions for installing, using, and
servicing a Master-Bilt BHC case. A parts list is included with this manual. Read all these documents carefully before
installing or servicing your equipment.
STORE CONDITIONS
The Master-Bilt BHC cases are designed to operate in the controlled environment of an air-conditioned store. The
store temperature should be at or below 75°F and a relative humidity of 55% or less. At higher temperature or humidity
conditions, the performance of these cases may be affected and the capacity diminished.
The Master-Bilt BHC should not be positioned where it is directly exposed to rays of sun or near a direct source of
radiant heat or airflow. This will adversely affect the case and will result in poor performance.
If this case is to be located against a wall, there should be at least 4” space between the wall and the back of the case.
This space will allow for the circulation of air behind the case, which will prevent condensation on the exterior surfaces.
NOTICE
Read this manual before installing your cabinet. Keep the manual and refer to it before
doing any service on the equipment. Failure to do so could result in personal injury or damage to the cabinet.
DANGER
Improper or faulty hook-up of electrical components on the refrigeration units can result in severe injury or
death.
All electrical wiring hook-ups must be done in accordance with all applicable local, regional or national
standards.
NOTICE
Installation and service of the refrigeration and electrical components of the cabinet must be performed by a
refrigeration mechanic and/or a licensed electrician.
The portions of this manual covering refrigeration and electrical components contain technical instructions intended
only for persons qualified to perform refrigeration and electrical work.
This manual cannot cover every installation, use or service situation. If you need additional information, call or write us:
Customer Service Department
Master-Bilt Products
Highway 15 North
New Albany, MS 38652
Phone (800) 684-8988
Fax (800) 684-8988
4
WARNING LABELS AND SAFETY INSTRUCTIONS
This symbol is the safety-alert symbol. When you see this symbol on your cabinet or in this
manual, be alert to the potential for personal injury or damage to your equipment.
Be sure you understand all safety messages and always follow recommended precautions and safe operating
practices.
NOTICE TO EMPLOYERS
You must make sure that everyone who installs, uses or services your cabinet is thoroughly familiar with all
safety information and procedures.
Important safety information is presented in this section and throughout the manual. The following signal words are
used in the warnings and safety messages:
DANGER: Severe injury or death will
WARNING: Severe injury or death can
CAUTION: Minor injury or damage to your cabinet can occur if you ignore the message.
NOTICE: This is important installation, operation or service information. If you ignore the
message, you may damage your cabinet.
The warning and safety labels shown throughout this manual are placed on your Master-Bilt Products cabinet
at the factory. Follow all warning label instructions. If any warning or safety labels become lost or damaged,
call your customer service department at (800) 684-8988 for replacements.
This label is attached to the cabinet power cord on models with a power cord.
label and on the wiring channel.
occur if you ignore the message.
occur if you ignore the message.
CAUTION!
GROUND REQUIRED
FOR SAFE OPERATION
This label is located on top of the electrical control
5
PRE-INSTALLATION INSTRUCTIONS
INSPECTION FOR SHIPPING DAMAGE
You are responsible for filing all freight claims with the delivering truck line. Inspect all cartons and crates for damage
as soon as they arrive. If damage is noted to shipping crates or cartons or if a shortage is found, note this on the bill of
lading (all copies) prior to signing.
If damage is discovered when the cabinet is uncrated, immediately call the delivering truck line and follow up the call
with a written report indicating concealed damage to your shipment. Ask for an immediate inspection of your concealed
damage item. Crating material must
be retained to show the inspector from the truck line.
INSTALLATION INSTRUCTIONS
GENERAL INSTRUCTIONS
1. Be sure the equipment is properly installed by competent service people.
2. Keep the equipment clean and sanitary so it will meet your local sanitation codes. Clean the cabinet with a mild
detergent and water, then rinse.
3. Rotate your stock so that older stock does not accumulate. This is especially important for ice
cream. A "First-In, First-Out" rotation practice will keep the products in good salable condition.
4. Do not place product in the case when it is soft or partially thawed. Also, product should not be put in the case for at
least 4 hours after it is started.
5. Stock cases as quickly as possible, exposing only small quantities to store temperatures for short periods of time.
NOTICE TO STORE OWNERS / MANAGERS
Moisture or liquid around or under the cabinet is a potential slip/fall hazard for persons walking by or working
in the general area of the cabinet. Any cabinet malfunction or housekeeping problem that creates a slip/fall
hazard around or under the cabinet should be corrected immediately
If moisture or liquid is observed around or under a Master-Bilt cabinet, an immediate investigation should be made by
qualified personnel to determine the source of the moisture or liquid. The investigation should determine if the cabinet
is malfunctioning or if there is a drainpipe leaking.
6
.
MECHANICAL
Remove front grille and check refrigeration lines to see that they are free (not touching each other or compressor).
Spin condenser fan blade to see that it is free.
Check for electrical wires that may haved moved during shipping.
Remove cabinet from crate base and slide into location. Cabinet must be level from side to side and front to back for
correct draining of coil pan and for self-closing doors to operate correctly. Allow minimum of 4” between back of cabinet
and wall and between top of cabinet and ceiling for proper condensing unit air circulation.
To comply with Sanitation requirements the cabinet must be mounted on legs (6” high min.) or casters or the base must
be sealed to the floor with an N.S.F. listed silicone sealant.
To comply with UL requirements the cabinet must have a minimum clearance of 4” at the top, 6” at the rear and 0” at
each side.
ELECTRICAL
WARNING
Before servicing electrical components in the case or the doors or door frames make sure all power to case is
ff. Always use a qualified technician.
Check voltage and amps drawn on (Page 17) to determine proper line and fuse or circuit breaker size. Check power
supply for low voltage. If voltage reads “230” with no load, and it drops below “207” when the compressor tries to start, it
is an indication of too small supply wiring or too long to run.
It is recommended that a separate circuit be run for each cabinet to prevent another appliance blowing the fuse or
breaker, causing loss of product. All circuit breaker to be “HACR” type or fuses to be time delay type.
The cabinet should be grounded.
7
LOW TEMPERATURE FREEZERS – “BHC” Models
The BHC has a power cord in the bottom of the cabinet at the right rear for connection to power. On initial start-up the
evaporator fan motors will not start and you cannot initiate a defrost until the evaporator coil temperature has lowered to
30°F. This is due to the thermostat. Also, the cabinet comes with a non-adjustable “Front” control to keep the mullion
heaters off until the cabinet temperature has lowered to 10°F.
LEG AND CONDENSATE PAN INSTALLATION FOR TOP MOUNT CABINETS ONLY
1. Screw legs or casters into existing crate
mounting holes.
SERVICE INSTRUCTIONS
1. High head pressure and high back pressure:
A. Condenser coil clogged or restricted
B. Condenser fan motor defective.
C. Air discharge in rear of cabinet restricted.
2. Low back pressure and low head pressure:
A. Restriction in system.
B. Refrigerant undercharged.
C. Leak in system
3. Pressure normal – cabinet warm:
A. Coil blocked with frost.
B. Refrigerant undercharged.
C. Control set too warm.
4. Cabinet not cycling – coil blocked with frost:
A. Defective temperature controller.
B. Refrigerant overcharged.
C. Location too hot.
D. Condenser clogged.
E. Condenser fan motor defective.
F. Defrost heater not operating.
5. Compressor starts and runs – but cycles on overload:
A. Low voltage
B. Relay defective.
C. Overload defective.
D. High head pressure .
8
Temperature sensor, defrost heater and fan motor replacement
Before making any change, technician should:
1. Disconnect power to the cabinet
2. Remove screws from venturi and pull down
To change a temperature sensor (cabinet zone sensor or defrost termination sensor), simply disconnect the sensor
wires from the controller and replace the new sensor in the original position. Use plastic tie to tighten the zone sensor.
Insert the sensor for defrost termination firmly into the evaporator coil, in between the fins. Make sure the sensor wires
do not touch or are not close to any heater rods.
To change defrost heater – remove screws from drain pan and pull down – remove screws from coil mounting straps –
spring straps open – remove heater shield – pull heater out of slots in coil fins.
To change fan motor – disconnect fan motor leads – remove screws from fan guards and motor mounts.
9
MASTER-BILT ELECTRONIC REFRIGERATION CONTROL
OPERATION
Compressor W hen power is first tur ned on to the control, the LED indicator under COMP on the display
starts blinking. Af ter one-minute delay the compressor comes on. The COMP LED indicator stays on while
compressor relay is energized. Display will show actual box temperature. Figure 4 is the display layout.
The compressor will be cycled off when the actual box temperature reaches its set point. The COMP
indicator will be off.
Fig. 4 – Display Lay-out
Fan The fans will run constantly except when a defrost is initiated, the door’s are opened, or when the
evaporator temp is above the 30
the 2 minute drip time has passed. There is 4 minutes delay after a def rost before the f an comes on. The
difference of t he evaporator and room temperature of mor e than 9
indicator is on while FAN relay is energized.
Defrost The control uses timed defrost s with 3 defrosts per day. A programmed “HOT-KEY” has to
be used to re-set the defrost scheme for special applications. Dur ing defrost t he display will show dEF and
the LED indicator under DEF in on.
MANUAL DEFROST
o
F. When in def rost mode the fan is off until the end of the defrost and
o
F will override the fan delay. FAN LED
1. Push this DEFROST
2. While in defrost, Push and hold the DEFROST
key for more than 2 seconds and a manual defrost will start.
key for more than 5 seconds and the
controller will end the def rost cycle. The cont roller will then enter dr ip mode for 2 m inutes. The DEF
led is flashing in drip mode.
HOW TO SEE THE SETPOINT (Box temperature cut-out)
1.
Push and immediately release the SET key: the display will show the Set
point value;
2. Push and immediately release the SET key or wait for 5 seconds to display the probe value
(actual box temperature) again.
HOW TO CHANGE THE SETPOINT
1. Push the SET key for more than 2 seconds to change the Set point value;
2. The value of the set point will be displayed and the LED under COMP starts blink ing;
3. To change the Set value push the UP ▲ or DOWN▼ arrows within 10s.
To memorize the new set point value push the SET key again or wait 10s.
10
HOW TO CHANGE a parameter value
1. Enter the Programming mode by pressing the SET and DOWN ▼ keys for 3 seconds (LEDs under
DEF and COMP start blinking).
2. Select the required parameter by pushing
3. Press the “SET” key to display its value (now only the COMP LED is blinking)
4. Use “UP” or “DOWN” to change its value
5. To exit: Press SET + UP ▲ or wait 15s without pressing a key.
NOTE 1: The set value is stored even when the procedure is exited by waiting the time-out to expire.
NOTE 2: Master-Bilt’s SETPOINT for this cabninet is set at a recommended –20°F at the factory for low
temperature(LT).
NOTE 3: To scroll down the parameters without changing them, press the DOWN button.
LIST OF PARAMETERS
Here is a list of the parameter s the value of which can be changed in the programming mode, as well as
their ranges.
Parameter Display
Symbol
Temperature Set
Point
Temperature
Set
Hy
When this t em per at ure is
reached the compressor LED
Cut-out temperature is Set + Hy 1 to 255°F
Differential
Maximum
Temperature
ALU
Alarm
Minimum
Temperature
ALL
Alarm
Temperature
Ald
Alarm Delay
Room Probe
dP1
display
Evaporator
dP2
Probe Display
ALARM SIGNALS
Mess
age
Room probe failure Compressor operated on
“P1”
Evaporator probe
“P2”
failure
Maximum temperature
“HA”
alarm
Minimum temperature
“LA”
alarm
Cause Outputs
time. 6min ON, 4 min OFF
Defrost end is timed
Outputs unchanged.
Outputs unchanged.
11
the UP ▲ or DOWN▼ ar r ows
Description Range
Master-Bilt’s
Setting
BHC-27 & 48
-30 to 15°F
-20°F (-29°C)
will be off
10°F (6°C)
230°F
30°F (-10°C)
-58°F
-35°F (-37°C)
0 to 255 min
30min
NOTE:
Probe alarms “P1” and “P2” start some
seconds after the fault in t he r elated
probe; they automatically stop some
seconds after the probe restarts normal
operation. Check connections before
replacing the probe.
Temperature alarms “HA” and “LA”
automatically stop as soon as the
thermostat temperatur e r et ur ns to normal
values and when defrost starts.
FINAL CHECK LIST
A. Check operating pressures.
B. Check electrical requirements of unit to supply voltage.
C. Set temperature control for desired temperature range.
D. Check sight glass (if applicable) for proper refrigerant charge.
E. Check system for proper defrost settings and operation.
F. Check condensing unit for vibrating or rubbing tubing. Dampen and clamp as required.
G. All valves should be completely opened counter-clockwise.
H. Check packing nuts on all service valves.
I. Replace all service valve caps and latch unit covers.
SENSOR PROBE
NOTICE: If the probe assembly is disconnected from the main board during normal operation (unit running), the
connectors must be installed in the same position that they had before disconnection (P1 and P2), otherwise the control
will not function properly.
The Electronic Refrigeration Control sensors have NTC thermistors. The reference resistance is 30,000 ohms at 77°F
(25°C). It carries NTC thermistors with a range of –40° to 199° F. In case there is a failure, these sensors should be
used in replacement of the sensors shipped with the control. In order to diagnose faults in the probe, the control has
LED functions as a diagnostic tool. When power is supplied to the control, the LED will turn on and will remain on as
long as this condition is satisfied. When there is a fault in the probe, the LED will blink intermittently. When this occurs,
the probe assembly needs to be replaced. If power is supplied to the control and the LED remains off, there is a failure
in the main relay control and it needs to be replaced.
In case of a probe failure, the control will go into a safety mode of operation. While in safety mode the control ignores
probe inputs and cycles the compressor on for 6 minutes and off for 4 minutes. The LED will be blinking and signalling
that there is something wrong with the probe. To replace the sensor probes, disconnect power to the control, replace
the probes and restart the unit. Since the wire is fixed to the cabinet, a technician may cut the sensor wire inside the
cabinet and splice it with a new sensor.
SENSOR PROBE TEMPERATURE AND RESISTANCE
Temperature Resistance
°F °C
-29.2 -34 683,100
-20.2 -29 499,200
-9.4 -23 347,100
-0.4 -18 259,500
10.4 -12 185,200
19.4 -7 141,200
30.2 -1 103,100
32.0 0 97,950
39.2 4 80,040
50.0 10 59,700
60.8 16 45,000
69.8 21 35,820
80.6 27 27,500
89.6 32 22,210
12
Ohms
MASTER-BILT PART LIST
The table below gives Master-Bilt part numbers. Use this chart when ordering replacement parts for your IHC cabinets.
Always Advise Cabinet Serial Number When Ordering Parts.
Description BHC-27 BHC-48
Cabinet Frame Heater 17-09419 17-09150 17-09441
Coil Defrost Heater 1709407 17-09440 17-09408
Compressor 03-14902 03-14960 03-14973
Condenser Coil 07-13391 07-13391 07-13344
Condenser Fan Blade 15-13093 15-13093 15-13093
Contactor 19-13936 19-13934 19-13934
Condenser Fan Motor 13-00311 13-01283 13-01283
Controller 19-13918 19-13963 19-13963
T-Sensor (2) 19-13932 19-13932 19-13932
Door Gasket 37-01321 37-01321 37-01320
Door Hinge-Outer Doors 35-01450 35-01450 35-01450
Door Trim 29-01379 29-01379 29-01379
Drain Line Heater 17-00404 17-09063 17-09063
Drain Fitting 11-01410 11-01410 11-01410
Drier 09-09171 09-09171 09-09711
Evaporator Coil 07-13288 07-13288 07-13289
Evaporator Fan Blade 15-13106 15-13106 15-13106
Evaporator Fan Guard 25-01324 25-01324 25-01324
Evaporator Fan Motor 13-13181 13-13182 13-13182
Expansion Valve 09-09445 09-09445 09-09542
Drain Line heater 21-00577 21-00577 21-00577
Front Control 19-13897 19-13879 19-13897
Heater Safety Control 19-01164 19-01164 19-01191
Leg Leveler 27-00592 27-00592 27-00592
Compressor Switch 19-13118 19-13118 19-13118
Shelves 33-01763 33-01763 33-01875
Air Valve 11-01720 11-01720 11-01720
Shelf Clip 33-01011 33-01011 33-01011
Switch Hinge 35-01506 35-01506 35-01506
Run Capacitor 30MFD13700 30MFD13700 03-14975 (40MFD14400)
Start Capacitor 233-28011650 188-10813300 03-14976 (172-216MFD13300)
Start Relay 3ARR3-A3P6 3ARR3-A3A6 03-14977 (3ARR3-B3R3)
115 Volt 230 Volt 230 Volt
Accessories
Description IHC-27 IHC-48
Casters (4) 5” diameter A297-11140 A297-11140
Voltage Boosting Transformer 39-01080 (208-230V) 39-01080
13
SALE AND DISPOSAL
OWNER RESPONSIBILITY
If you sell or give away your Master-Bilt cabinet you must make sure that all safety labels and the Installation - Service
Manual are included with it. If you need replacement labels or manuals, Master-Bilt will provide them free. Contact the
customer service department at Master-Bilt at (800) 684-8988.
The customer service department at Master-Bilt should be contacted at the time of sale or disposal of your cabinet so
records may be kept of its new location.
14
15
16
17
Loading...