Chromalox UB-502D Air Conditioner User Manual

Installation, Operation
SERVICE REFERENCE
DIVISION
and
4
SALES
REFERENCE
RENEWAL PARTS IDENTIFICATION
SECTION
UB
PF416-13
(Supersedes PF416-12)
161-048444-001
JULY, 2002
DATE
UB-502D and UB-752D
Forced-Air Heaters
Dimensions —
Ceiling Line
13-5/8”
11-5/8”
3”
Back
Wall
For Lower Height
from Ceiling:
Customer to add
Extension Strap.
17-3/16”
8”
Rubber Feet Provided for
Wall Mount Units Only.
4-7/8”
Wall
Mounting
Holes
Center
11-7/8”
6”
7-9/16”
6” Min. Spacing to
Adjacent Wall
8”
8-7/
8”
8-7/8”
7/8” and 1-13/32”
Dia. Holes in Rear
6”
15-9/16”
Figure 2
Mounting UB using wall
mounting brackets*
Figure 1
Mounting UB using ceiling
mounting brackets*
7’-0” Min. Height
Above Floor
*Wall and/or Ceiling Mounting Brackets are
available as an accessory option — Contact
local sales representative.
7’-0” Min. Height
Above Floor
Specifications —
Model
UB-502D
UB-502D-R
UB-752D
UB-752D-R
Voltage and Phase
kW
Horizontal
Air Discharge
(Ft.)
120 (1ø); 208, 240 or 480 (1ø or 3ø)
5
12.5
208, 240 or 480 (1ø or 3ø)
5
12.5
120 (1ø); 208, 240 or 480 (1ø or 3ø)
7.5
13
208, 240 (3ø); 480 (1ø or 3ø)
7.5
13
‡ Model Numbers with suffix “T” added (480 volts only) are equipped with a transformer, 480V Primary — 120/240V Secondary.
‡ Model Numbers with suffix “R” added are equipped with a relay.
MOUNTING
WARNING: Hazard of Electric Shock. Disconnect all
power before installing heater.
Note: These heaters are designed for wall or ceiling mounting
only. Other modes of mounting voids factory warranty.
1. Height above floor
A. In areas where ceiling height is more than 12 feet, recommended mounting height is approximately 10 feet to underside of heater.
B. For ceiling heights of 12 feet or less, maximum mounting
height is determined by use of ceiling mounting brackets
offered for these heaters. Minimum spacing to ceiling is 3”
(see Figure 2).
© 2010 Chromalox®, Inc.
C. In either case, minimum mounting height is 7 feet from
floor to bottom of heater. (See Figures 1 and 2.)
2. Spacing to adjacent walls
A. Rear of case to back wall 4-7/8” minimum (see Figure 2).
B. Side of case to side wall 6” minimum (see Figure 2).
3. If two or more units are operated in the same enclosed space,
their discharges should be directed to aid in development of
mass air movement for uniform heat dispersal.
4. Controlling thermostats to individual heaters should be
mounted at shoulder height on inside walls or columns.
WIRING
Note: All wiring should be done in accordance with local codes
and the National Electrical Code by a qualified person.
WARNING: Hazard of Electric Shock. Any installation
involving electric heaters must be effectively
grounded in accordance with the National Electrical
Code to eliminate shock hazard.
1. Connect heater according to the voltage and frequency specified on the nameplate and using the appropriate wiring diagram
(Figures 3 thru 8).
Note: Be sure to check voltage rating of the fan motor which is
either 120, 208 or 240 volt, single phase since heater circuit
could be 480 volts, single or three phase.
2. If a transformer is used to step down the voltage for operating
the fan motor, use appropriate wiring diagram (Figures 5 or 7).
3. Heaters are not provided with a control switch and should be
controlled by a magnetic contactor (integral or external) and a
separately mounted thermostat. External contactor is not necessary with heaters having a model number suffixed with the
letter “R”.
4. Protection against overheating is provided by an internal automatic thermal cutout which opens the electric circuit if the normal air-flow is restricted or stopped. Cutout automatically
energizes heater on removal of the obstruction.
WARNING: Users should install adequate back-up
controls and safety devices with their electric heating equipment. Where the consequences of failure
may be severe, back-up controls are essential.
Although the safety of installation is the responsibility of the user, Chromalox will be glad to make
equipment recommendations.
OPERATION
DANGER:
1. Do not restrict air-flow through the heater by
placing fabric or other obstructions in front of or
behind the heaters. With some combustible
materials, the resulting high discharge temperatures could cause a fire.
2. This heater is not intended for use in hazardous
atmospheres where flammable vapors, gases, liquids or other combustible atmospheres are present
as defined in the National Electrical Code. Failure
to comply can result in explosion or fire. For these
applications see Bulletin PDS CXH-EP PF305.
MAINTENANCE
WARNING: Turn off all power to service heater. Do not
attempt to service heater while unit is operating as
there is hazard of electric shock, injury from operating fan, and burns from hot heating elements.
1. Fan motors in these heaters are provided with sealed ball bearings, factory lubricated, requiring no further lubrication under
normal service conditions.
2. Following long periods of idleness, heater should be vacuumed before start-up, to remove accumulated combustible particles which otherwise may smoke or incinerate on initial heat
up.
3. Periodically inspect all electrical connections and terminals to
avoid electrical wiring difficulties. Inspect all wiring for frayed
or worn insulation.
WIRING DIAGRAMS
Figure 3
Control Source for
Separately Wired Motors
120 or 240 Volts, 60 Cycle
}
Use with:
UB-502D
120V, 1Ø
208V, 1Ø or 3Ø
240V, 1Ø or 3Ø
Heater Bank
1 or 3 Phase 60 Hz
Power Supply 120, 208
or 240 Volts
1Ø Motor
Heater
Fused
Switch
Fused
Switch
Contactor
UB-752D
208V, 3Ø
240V, 3Ø
Wiring Comp't
Baffle
Ground
When Heater and
Motor Voltage are similar
This Wiring
by Customer
F1
F2
For 3 Phase Only
Thermostat When Used
L1
L2
L3
Figure 4
Use with:
UB-502D &
UB-752D
480V, 1Ø or 3Ø
UB-752D
208V, 1Ø
208V, 1Ø
Control Source for
Separately Wired Motors
120 or 240 Volts, 60 Cycle
}
1 or 3 Phase 60 Hz
Power Supply 208, 240
or 480 Volts
Heater Bank
1Ø Motor
Cutout
Heater
Fused
Control Switch
Fused
Switch
Contactor
Ground
Wiring Comp't
Baffle
This Wiring
by Customer
Thermostat When Used
F1
F2
T1
L1
L2
L3
For 3 Phase Only
WIRING DIAGRAMS
Figure 5
Use with:
UB-502D-T &
UB-752D-T
480V, 1Ø or 3Ø
}
Alternate 240V Wiring
1 or 3 Phase 60 Hz
Power Supply 480 Volts
X1
X3
X4
X2
Heater Bank
Fused
Switch
Integral 480V/240V
or 120V Transformer
Contactor
1Ø Motor
120V Wiring
X1
X3
X2
X4
Heater
Thermal
Cutout
H1
Control
Switch Optional
This Wiring
by Customer
Thermostat
When Used
H2
Ground
Wiring Comp't
Baffle
C1
T1
T2
F1
F2
L1
L2
L3
Figure 6
Use with:
UB-502D-R &
UB-752D-R
480V, 1Ø or 3Ø
}
For 3 Phase Only
1 or 3 Phase 60 Hz Power
Supply 208, 240 or 480 Volts
Heater Bank
1Ø Motor
Heater
Control
Source 120 or
240 Volts, 60 Cycle
Fused
Switch
Integral
Contactor
Cutout
Fused
Control Switch
This Wiring
by Customer
Thermostat
When Used
Figure 7
Use with:
UB-502D-TR &
UB-752D-TR
480V, 1Ø or 3Ø
}
Ground
Wiring Comp't
Baffle
C1
C2
L1
L2
L3
For 3 Phase Only
Alternate 240V Wiring
1 or 3 Phase 60 Hz Power
Supply 480 Volts
X1
X3
X2
1Ø Motor
X4
Heater Bank
Cutout
Integral 480V/240V
or 120V Transformer
120V Wiring
X1
X3
X2
Heater
X4
Fused
Switch
H1
Integral
Contactor
H2
Control
Switch Optional
Thermostat
When Used
Ground
This Wiring
by Customer
Wiring Comp't
Baffle
T1
T2
C1
C2
L1
For 3 Phase Only
L2
L3
Figure 8
Use with:
UB-502D-R
208V, 1Ø or 3Ø
240V, 1Ø or 3Ø
UB-752D-R
208V, 3Ø
240V, 3Ø
}
1 or 3 Phase 60 Hz
Power Supply 208 or 240 Volts
1Ø Motor
Heater
Fused
Switch
Thermostat
When Used
This Wiring
by Customer
Ground
Cutout
Heater Bank
Integral
Contactor
Wiring Comp't
Baffle
T1
T2
L1
L2
L3
For 3 Phase Only
RENEWAL PARTS IDENTIFICATION
1
UB-502D
2 MOTORS
Volts
Phase
Heating
Element
120
1
118-045259-001 (3)
3
4
8
Fan
Thermal
Cutout
Transformer
120V
208V
240V
193-302120-009
—————
—————
112-045408-006 300-049200-006 (3)
—————
300-049200-006 1ø (2) ‡
112-045408-006
300-049200-006 3ø (3) ‡
—————
300-049200-006 1ø (2) ‡
300-049200-006 3ø (3) ‡
—————
UB-502D
208
1 or 3
118-045259-002 (3)
193-302120-009
193-302120-009
—————
UB-502D
240
1 or 3
118-045259-003 (3)
193-302120-009
—————
193-302120-009
112-045408-006
UB-502D*
480
1 or 3
118-045259-004 (3)
193-302120-009
—————
193-302120-009
112-045408-006 300-049200-006 (1)
—————
300-049200-006 1ø (1)
300-049200-006 3ø (3) ‡
—————
UB-752D
208
1 or 3
118-045259-006 (3)
193-302120-009
193-302120-009
—————
UB-752D
240
1 or 3
118-045259-007 (3)
193-302120-009
—————
193-302120-009
112-045408-005
UB-752D*
480
1 or 3
118-045259-008 (3)
193-302120-009
—————
193-302120-009
112-045408-005 300-049200-006 (1)
‡ Note: Only one thermal cutout is used if a Transformer and/or Relay is used.
Note: Part numbers suffixed by a number in ( ) indicates quantity of same part number used.
* Fusing Parts
Fuse 3 Amp 600V KTK-3
Fuse Block Barrier
Fuse Block
Part Number
128-047763-007 (2)
129-048475-001 (1)
129-048473-001 (2)
PARTS COMMON TO ALL HEATERS
5
6
7
10
11
12
315-303675-001
300-049200-006 1ø (1)
112-045408-005
300-049200-006 3ø (3) ‡
Wall Bracket Set . . . . . . . . . . . . . . . . . . . . . . . . . .168-026844-002
Ceiling Mounting Support Set (Includes ’ ) . . . .027-044419-002
Ceiling Suspension Bracket . . . . . . . . . . . . . .027-033363-001 (2)
Louver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .182-047073-002
Motor Mounting Frame . . . . . . . . . . . . . . . . . . . .194-045254-001
Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .134-119147-002
315-303675-001
RENEWAL PARTS IDENTIFICATION
9 RELAYS
Model
Volts
Phase
Motor
Relay
UB-502D
UB-502D
UB-502D
UB-502D
UB-502D
UB-502D
UB-502D
UB-502D
UB-502D
UB-502D
UB-502D
UB-502D
UB-752D
UB-752D
UB-752D
UB-752D
UB-752D
UB-752D
UB-752D
UB-752D
UB-752D
UB-752D
UB-752D
UB-752D
208
208
208
208
240
240
240
240
480
480
480
480
208
208
208
208
240
240
240
240
480
480
480
480
1
1
3
3
1
1
3
3
1
1
3
3
1
1
3
3
1
1
3
3
1
1
3
3
120V
208V
120V
208V
120V
240V
120V
240V
120V
240V
120V
240V
120V
208V
120V
208V
120V
240V
120V
240V
120V
240V
120V
240V
072-303180-011
072-303180-016
072-303180-007
072-303180-013
072-303180-011
072-303180-016
072-303180-007
072-303180-013
072-303180-011
072-303180-016
072-303180-007
072-303180-013
——————
——————
072-303180-007
072-303180-013
——————
——————
072-303180-007
072-303180-013
072-303180-011
072-303180-016
072-303180-007
072-303180-013
Limited Warranty:
Please refer to the Chromalox limited warranty applicable to this product at
http://www.chromalox.com/customer-service/policies/termsofsale.aspx.
2150 N. RULON WHITE BLVD., OGDEN, UT 84404
Phone: 1-800-368-2493
www.chromalox.com
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