SERVICE REFERENCE
Installation, Operation
DIVISION
SALES
4
SECTION UB
and
(Supersedes PF416-12)
161-048444-001
REFERENCE
PF416-13
RENEWAL PARTS IDENTIFICATION
DATE
JULY, 2002
UB-502D and UB-752D
Forced-Air Heaters
Dimensions —
Ceiling Line
13-5/8”
11-5/8”
6” Min. Spacing to
Adjacent Wall
3”
Back
Wall
For Lower Height
from Ceiling:
4-7/8”
Customer to add
Extension Strap.
Wall
17-3/16”
Mounting
Holes
Center
8”
11-7/8”
6”
8”
8-7/8”
7-9/16”
6”
7/8” and 1-13/32”
Dia. Holes in Rear
Rubber Feet Provided for
Wall Mount Units Only.
15-9/16”
Figure 2
Mounting UB using wall
mounting brackets*
7’-0” Min. Height
Above Floor
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.
Specifications —
Horizontal
Air Discharge
(Ft.)
Model
Voltage and Phase
kW
UB-502D
120 (1ø); 208, 240 or 480 (1ø or 3ø)
208, 240 or 480 (1ø or 3ø)
5
12.5
12.5
13
UB-502D-R
UB-752D
5
120 (1ø); 208, 240 or 480 (1ø or 3ø)
208, 240 (3ø); 480 (1ø or 3ø)
7.5
7.5
UB-752D-R
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
C.In either case, minimum mounting height is 7 feet from
WARNING: Hazard of Electric Shock. Disconnect all
floor to bottom of heater. (See Figures 1 and 2.)
2. Spacing to adjacent walls
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.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.
A.In areas where ceiling height is more than 12 feet, recom-
mended mounting height is approximately 10 feet to under-
side of heater.
4. Controlling thermostats to individual heaters should be
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).
mounted at shoulder height on inside walls or columns.
© 2010 Chromalox®, Inc.
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WIRING DIAGRAMS
Alternate 240V Wiring
X4
Figure 5
Use with:
1 or 3 Phase 60 Hz
Power Supply 480 Volts
X1
X3
X2
}
Heater Bank
1Ø Motor
Integral 480V/240V
or 120V Transformer
UB-502D-T &
UB-752D-T
480V, 1Ø or 3Ø
Fused
120V Wiring
X2
X4
Switch
X1
X3
Contactor
Heater
Thermal
Cutout
H1
H2
Control
Switch Optional
This Wiring
by Customer
Ground
Wiring Comp't
Baffle
Thermostat
When Used
C1
T1
T2
F1
F2
For 3 Phase Only
L1
L2
L3
Figure 6
Use with:
Heater Bank
1 or 3 Phase 60 Hz Power
Supply 208, 240 or 480 Volts
1Ø Motor
}
UB-502D-R &
UB-752D-R
Heater
480V, 1Ø or 3Ø
Control
Source 120 or
240 Volts, 60 Cycle
Fused
Switch
Integral
Contactor
Cutout
Fused
Control Switch
This Wiring
Ground
Wiring Comp't
Baffle
Thermostat
When Used
by Customer
C1
C2
For 3 Phase Only
L1
L2
L3
Figure 7
Use with:
Alternate 240V Wiring
Heater Bank
1 or 3 Phase 60 Hz Power
Supply 480 Volts
1Ø Motor
X4
X1
X3
X2
}
Cutout
UB-502D-TR &
UB-752D-TR
480V, 1Ø or 3Ø
Integral 480V/240V
or 120V Transformer
120V Wiring
Heater
X1
X3 X2
X4
Fused
Integral
Contactor
Switch
H1
H2
Control
Switch Optional
Thermostat
When Used
Ground
This Wiring
by Customer
Wiring Comp't
Baffle
T1
T2
C1
For 3 Phase Only
C2
L1
L2
L3
Figure 8
Use with:
Heater Bank
1 or 3 Phase 60 Hz
Power Supply 208 or 240 Volts
1Ø Motor
}
UB-502D-R
208V, 1Ø or 3Ø
240V, 1Ø or 3Ø
Heater
Cutout
Integral
Contactor
Fused
Switch
UB-752D-R
208V, 3Ø
240V, 3Ø
Thermostat
When Used
This Wiring
by Customer
Ground
Wiring Comp't
Baffle
T1
T2
For 3 Phase Only
L1
L2
L3
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RENEWAL PARTS IDENTIFICATION
1
3
4
8
2
MOTORS
208V
Heating
Element
Thermal
Cutout
Volts Phase
Fan
Transformer
120V
240V
UB-502D
UB-502D
120
208
1
118-045259-001 (3)
118-045259-002 (3)
193-302120-009
193-302120-009
—————
—————
—————
112-045408-006 300-049200-006 (3)
—————
—————
300-049200-006 1ø (2) ‡
112-045408-006
1 or 3
193-302120-009
300-049200-006 3ø (3) ‡
300-049200-006 1ø (2) ‡
112-045408-006
UB-502D
UB-502D*
UB-752D
240
480
208
1 or 3
1 or 3
1 or 3
118-045259-003 (3)
118-045259-004 (3)
118-045259-006 (3)
193-302120-009
193-302120-009
193-302120-009
—————
—————
193-302120-009
193-302120-009
—————
—————
315-303675-001
—————
300-049200-006 3ø (3) ‡
112-045408-006 300-049200-006 (1)
300-049200-006 1ø (1)
112-045408-005
193-302120-009
300-049200-006 3ø (3) ‡
300-049200-006 1ø (1)
112-045408-005
UB-752D
240
480
1 or 3
1 or 3
118-045259-007 (3)
118-045259-008 (3)
193-302120-009
193-302120-009
—————
—————
193-302120-009
193-302120-009
—————
300-049200-006 3ø (3) ‡
UB-752D*
112-045408-005 300-049200-006 (1)
315-303675-001
‡ 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
Part Number
Fuse 3 Amp 600V KTK-3
Fuse Block Barrier
Fuse Block
128-047763-007 (2)
129-048475-001 (1)
129-048473-001 (2)
PARTS COMMON TO ALL HEATERS
5
6
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
7
10
11
12
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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
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Limited Warranty:
Please refer to the Chromalox limited warranty applicable to this product at
2150 N. RULON WHITE BLVD., OGDEN, UT 84404
Phone: 1-800-368-2493
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