Chromalox UB 752D User Manual

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.  
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  
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  
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  
2150 N. RULON WHITE BLVD., OGDEN, UT 84404  
Phone: 1-800-368-2493  

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