** No allowance made for fan heat - add 3,410 BTUH (1,000 watt) per HP to room load for motor heat.
* E = Electric Defrost • H = 3 Pipe Hot Gas Defrost • R = Reverse Cycle Hot gas Defrost
Careful inspection of all parts when received for loss or
damage in transit is very important - Remember, you, the
consignee, must make any claim necessary against the
transportation company. Shipping damage or missing
parts, when discovered at the outset, will prevent later
unnecessary and costly delays.
Ensure that the electrical characteristics are as ordered.
Save all tags and instruction sheets for reference by
installer and owner.
LOCATION
The unit location in the room should be selected to ensure
uniformair distribution throughout the entire space to be
refrigerated. Make sure that the fan does not blow directly
out or pull in through an opened door and that the product
does not obstruct the free circulation of air.
When installing the unit adjacent to a wall, sufficient
clearance must be provided to allow free air movement to
the coil.
Clearance must be provided at each end of the unit to
allow access to refrigerant piping and electrical
compartment.
See dimensional drawings for clearance requirements.
INSTALLATION
Note: These units draw air through the coil and
discharge air from the fan side (see P. 4).
JBC Unit Coolers are supplied with shipping legs to allow
units to be shipped in an upright position. Units are lifted
into place with shipping skid attached to mounting legs.
Slotted hanger brackets take 1/2” (12.7mm) hanger rods.
For fast, convenient mounting, install washer and nuts on
hanger rods prior to lifting units. Rods may be lifted into
slots and are held securely in place by tangs on hangers
After unit coolers are hung in place, remove shipping legs
from units by removing the two 5/16” (8mm) bolts from
each shipping leg.
Note: Shipping legs must be removed to allow hinged
drain pan to open.
DRAIN LINE
If unit cooler is mounted flush to ceiling, the staggered
heigh hanger will provide a positive pitch for drainage of
condenser.
If units are suspended below the ceiling, the installer
should provide adequate pitch to the unit by adjusting
the location of the hanger rod nuts.
Note: Check for adequate drainage by pouring water into
the drain pan.
Insulated copper tube should be run from the drain
connection, sloping at least 4” (102mm) per foot. A trap
outside of the room will prevent warm air entering
through the tubing. Connection should be made to
proper drainage facilities that comply with local
regulations.
If room temperatures are below freezing, it is necessary
to heat the drain line to prevent condensate from
freezing in the drain line. Electric heating cable or
electric tape (by others) is used for this purpose. The
drain line heater should be connected for continuous
operation; it is also recommended that the drain line be
insulated. A heat output of 20 watts per lineal foot of 1”
(25mm) drain line in a 0°F (-18 °C) room is usually
satisfactory. 115 volt cable and tape is available from
your local refrigeration wholesaler. Two 115 volts heaters
(by others) of the same wattage may be wired for use on
230 volt system
ELECTRICAL
Wire system in accordance with governing standards
and local codes. See wiring diagrams on P. 4 for unit
cooler wiring diagram.
Page 2 shows operating current, minimum ampacity and
maximum fuse sizing for fan motors.
Note: Electrical wiring is to be sized in accordance with
minimum ampacity rating.
The defrost termination thermostats, fan delay
thermostats and defrost heater safety thermostat are
factory supplied and factory wired to a terminal block.
See figure and component identification diagram on
wiring diagram for electrical compartment arrangement.
A hinged end panel provides quick access to the
electrical compartment.
- 10 -
Page 11
INSTALLATION INSTRUCTIONS
AFTER START UP
1. Check the oil level to be sure the oil charge is correct.
2. On the initial start up, the fans do not start until coil
temperature is pulled down to approximately 26 °F
(-3 °C)
Also, it is normal for the fans to cycle a few times
until the room temperature is pulled down.
Select an externally equalized expansion valve best
suited to the coil and the application on the basis of the
manufacturer’s ratings. Install the expansion valve in the
refrigeration piping compartment.
A 1/4” (6mm) O.D. equalizer line has been provided for
the externally equalized expansion valve connection.
3. After the room is pulled down make sure that the
expansion valve is properly set so that the coil frosts
evenly all the way through.
4. Heavy moisture loads are usually encountered when
starting the system for the first time. This will cause a
rapid build-up of frost on the unit cooler. During the
initial pull down, we suggest that the frost build-up be
watched and defrosted manually as required.
MAINTENANCE
1. Periodic checking and cleaning of the coil surface
when necessary should be done, using a whisk or
brush. Drain pans are hinged to provide convenient
access to the inside coil surface.
2. Motors are permanently lubricated type and require
no further lubrication.
REFRIGERATION SYSTEM
Refrigerant line sizes are important and should be the
same size as the coil connections, or larger, depending
on the length of run. Consult recommended refrigerant
line sizes charts (KeepRite Refrigeration Engineering
Manual or other recognized sources of information) when
sizing refrigerant lines.
Refrigerant piping and control systems should be
designed to prevent possible liquid slugging of the
compressors on start-up after the defrost cycle.
A Schrader valve fitting is supplied at the suction gas
header to provide convenient pressure readings.
The refrigerant distributor is sized and installed at the
factory and is supplied with a factory sized nozzle.
A hinged end panel provides quick access to the
refrigeration piping compartment.
SYSTEM CHECK
1. All wiring should be in accordance with local codes.
2. All refrigerant lines should be properly sized and
checked for any possible leaks.
3. Be sure system is charged with the proper refrigerant.
4. Make sure that the expansion valve thermal bulb is
securely strapped to the suction line.
5. The system should include a liquid line drier and
strainer.
6. The suction, discharge and receiver service valves
must be open.
7. Check that the fans turn freely and turn in clock wise
rotation.
8. Pour enough water into the drain pan to allow a good
check on drainage and seal the trap.
- 11 -
Page 12
AIR DEFROST MODELS
FIGURE 2 - ELECTRICAL COMPARTMENT
ELECTRIC DEFROST MODELS
DISTRIBUTOR
SCHRADER
FITTING
EXTERNAL
EQUALIZER
LINE
FIGURE 3 - REFRIGERATION COMPARTMENT
COIL
DEFROST
HEATERS
FAN
DELAY
THERMOSTST
DEFROST
TERMINATION
THERMOSTAT
DEFROST
HEATER
SAFETY
THERMOSTAT
TB3 CONTROL CIRCUIT
TERMINAL BLOCK
TB2
DEFROST
HEATER
TERMINAL
BLOCK
TB1 FAN MOTOR
TERMINAL BLOCK
WIRING
DIAGRAM
DISTRIBUTOR
SCHRADER
FITTING
EXTERNAL
EQUALIZER
LINE
FIGURE 2 - ELECTRICAL COMPARTMENT
FIGURE 3 - REFRIGERATION COMPARTMENT
- 12 -
Page 13
HOT GAS DEFROST MODELS
TB2 CONTROL CIRCUIT
TERMINAL BOX
DRAIN PAN HEADER
AND PIPING CONNECTION
TB1 FAN MOTOR
TERMINAL BLOCK
WIRING DIAGRAM
DISTRIBUTOR
EXTERNAL
EQUALIZER
LINE
SCHRADER
FITTING
DEFROST
TERMINATION
THERMOSTAT
FAN DELAY
THERMOSTAT
DRAIN PAN
HEADER
CHECK VALVE
- 13 -
Page 14
SERVICE PARTS LIST
FAN MOTORS
1 HP ODP 208-230/3/60
1 HP OPD 460/3/60
1 HP ODP 575/3/60
MOTOR MOUNT
FAN BLADE 30"
FAN MOTOR TERMINAL BLOCK TB1
DEFROST CONTROL TERMINAL BLOCK TB2
DEFROST HEATER TERMINAL BLOCK TB3
FAN DELAY THERMOSTAT
DEFROST TERMINATION THERMOSTAT
PART NUMBER
1040154
1040155
1040156
1040158
1040158
1040160
1040161
1040162
1040240
1040239
COIL DEFROST HEATERS
208-230/3/60
460/3/60
575/3/60
1040167
1040166
1040165
DRAIN PAN DEFROST HEATERS
208-230/3/60
460/3/60
575/3/60
THROW BOOSTER1040695
1040167
1040166
1040165
- 14 -
Page 15
- 15 -
Page 16
PROJECT INFORMATION
01/10/05
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DISTRIBUTED BY:
General Sales, PGeneral Sales, P
General Sales, P
General Sales, PGeneral Sales, P
135 Little Nine Drive, Morehead City135 Little Nine Drive, Morehead City
135 Little Nine Drive, Morehead City
135 Little Nine Drive, Morehead City135 Little Nine Drive, Morehead City
252-240-2829 • 1-800-24-BALL252-240-2829 • 1-800-24-BALL