Chromalox UB 2502A User Manual

4
UB  
(Supersedes PF423-3)  
PF423-4  
161-027048-001  
JULY, 2002  
Type UB-2502A and UB-3002A  
Forced-Air Heater  
Figure 1  
Figure 2  
(Wall Mounted)  
(Ceiling Mounted)  
Specifications – Table A  
Model  
Horizontal  
Wt.  
(Lbs.)  
Air  
Volts and Phase  
kW  
Discharge  
240V, 550V, 575V, 600V (3ø)  
480V (1ø or 3ø)  
UB-2502A  
UB-3002A  
25  
30  
48’  
48’  
185  
185  
240V, 550V, 575V, 600V (3ø)  
480V (1ø or 3ø)  
IMPORTANT  
Do not mount mercury type thermostat directly on unit. Vibration  
could cause heater to malfunction.  
WARNING: Hazard of Electric Shock. Disconnect  
all power before installing heater.  
WARNING: 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 PDS CXH-EP  
(PF305).  
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 essen-  
tial. Although the safety of installation is the  
responsibility of the user, Chromalox will be glad to  
make equipment recommendations.  
The heater must be mounted at least 7’ above the floor to prevent  
accidental contact with the heating elements or fan blade which  
could cause injury.  
Keep at least 5’ clearance in front of the heater. Refer to Figures 1  
and 2 for side, top and back clearance requirements.  
The wall or ceiling mounting structure and the anchoring provision  
must be of sufficient strength to support the combined weight of  
the heater and mounting bracket. (Refer to Table A for weights of  
heater and bracket).  
Fan blade rotation must be checked. If airflow is not moving out  
through the louvers, interchange any two of the three customer  
power leads on three-phase units only.  
© 2010 Chromalox, Inc.  
WIRING DIAGRAMS  
Figure 4  
Figure 5  
3
WIRING DIAGRAMS  
Figure 6  
Figure 7  
4
WIRING DIAGRAMS  
Figure 8  
Figure 9  
5
WIRING DIAGRAMS  
Figure 10  
Figure 11  
OPERATION  
2. Do not operate heater in corrosive atmosphere conditions to  
1. DANGER: Hazard of Fire.  
avoid destructive damage to heater.  
A. Do not restrict air flow through heater by placing fabric or  
other obstructions in front of or behind the heater.  
Increased discharge temperatures can discolor or ignite  
some heat sensitive combustible materials.  
3. Avoid operating heater in dusty environment which can foul  
heater fins to dissipate heat or impair motor ventilation leading  
to excessive operating temperatures.  
4. Do not operate heater in ambient temperatures exceeding 90OF.  
B. Do not operate heater in areas where combustible lint, dust  
or flammable vapors, gases or liquids are present.  
6
MAINTENANCE  
2. Vacuum heater before activating heater for next heating season  
WARNING: Turn off all power to service heater. Do  
not attempt to service heater while unit is operat-  
ing as there is hazard of electric shock, injury from  
operating fan, and burns from hot heating ele-  
ments.  
to remove accumulated dust or lint 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.  
1. Fan motors in these heaters are provided with sealed ball bear-  
ings, factory lubricated, requiring no further lubrication under  
normal service conditions.  
RENEWAL PARTS IDENTIFICATION  
1
HEATING ELEMENTS  
1
Model  
Voltage  
Phase  
Heating Element  
240  
480  
550  
575  
600  
240  
480  
550  
575  
600  
3
118-045307-011 (6)  
118-045307-012 (6)  
118-045307-013 (6)  
118-045307-014 (6)  
118-045307-015 (6)  
118-045307-002 (6)  
118-045307-003 (6)  
118-045307-007 (6)  
118-045307-016 (6)  
118-045307-017 (6)  
1 or 3  
UB-2502A  
3
3
3
3
1 or 3  
UB-3002A  
3
3
3
Note: Number in parentheses ( ) indicates the quantity of that part required.  
7
RENEWAL PARTS IDENTIFICATION  
2
3
MOTORS AND CAPACITORS  
2
3
Motors  
Capacitors  
Specifications  
Specifications  
Type Vac Cap.  
Oil 370 5 MFD  
Oil 370 6 MFD  
Manufacturer’s  
Cat. No.  
Manufacturer’s  
Cat. No.  
Part No.  
Part No.  
Volts Amps Phase Cycles RPM HP  
193-025776-001  
193-025776-002  
193-302120-011  
HF2K007N  
HF2K006N  
115 5.4  
1
1
3
60 1625 1/3 040-025779-001  
60 1625 1/3 040-025779-002  
1270  
1271  
230 2.54  
P55YYBYV-887 460 0.9  
60 1725 1/3  
TRANSFORMERS  
4
5
Voltages  
Size  
Part Number  
V.A. Rating  
Primary  
Secondary  
315-052169-011  
315-052169-012  
315-304252-001  
315-304252-003  
220, 230, 240, 440, 460, 480  
550, 575, 600  
240 & 480  
110, 115, 120  
110, 115, 120  
120  
4
Large  
970  
5
Small  
40  
575  
120  
FUSES  
6
Fuses — 600 Volt  
Fuseholders  
Manufacturer’s  
Part Number  
Amps  
Use  
Part Number  
Description  
Cat. No.  
128-026510-001  
128-026510-004  
128-026510-005  
128-026510-006  
128-027590-001  
128-027590-008  
128-027590-010  
35  
40  
45  
50  
1
JKS 35  
JKS 40  
Power  
129-025643-001  
600 Volt, 60 Amp, 3 Pole  
JKS 45  
JKS 50  
KTK-R-1  
KTK-R-8  
KTK-R-15  
129-048473-001  
129-048475-001  
2, 3, 4, 5 poles contact section  
Control/  
Motor  
8
End barrier section for use  
with 129-048473-001  
15  
PARTS COMMON TO ALL HEATERS  
7
8
13  
Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112-027567-001  
Fan Delay . . . . . . . . . . . . . . . . . . . . . . . . . . 300-048038-001  
Cutout . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300-049602-008  
Manual Reset Cutout (Optional) . . . . . . . . . 300-117647-006  
Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134-119147-003  
Louver Assembly . . . . . . . . . . . . . . . . . . . . 182-047073-003  
Mounting Bracket - (Right Hand) . . . . . . . . 027-025836-001  
(Left Hand) . . . . . . . . . 027-025836-002  
14  
15  
16  
Thermostat (Optional) . . . . . . . . . . . . . . . . 300-026604-001  
Contactor . . . . . . . . . . . . . . . . . . . . . . . . . . 072-304551-008  
Auxiliary Contact . . . . . . . . . . . . . . . . . . . . 072-304551-101  
9
10  
11  
12  
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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