Although the safety of installation is the responsibility of the user, Chromalox will be glad to make equipment recommendations. OPERATION DANGER: 2. This heater is not intended for use in hazardous 1. Do not restrict air-flow through the heater by atmospheres where flammable vapors, gases, liqplacing fabric or other obstructions in front of or uids or other combustible atmospheres are present behind the heaters. With some combustible as defined in the National Electrical Code. Failure materials

For these tures could cause a fire. applications see Bulletin PDS CXH-EP PF305. MAINTENANCE WARNING: Turn off all power to service heater. Do not 2. Following long periods of idleness, heater should be vacuattempt to service heater while unit is operating as umed before start-up, to remove accumulated combustible par- there is hazard of electric shock, injury from operat-ticles which otherwise may smoke or incinerate on initial heat ing fan, and burns from hot heating elements. up. 3. Periodical

Part No. Cat. No. Cat. No. Volts Amps Phase Cycles RPM HP Type Vac Cap. 193-025776-001 HF2K007N 115 5.4 1 60 1625 1/3 040-025779-001 1270 Oil 370 5 MFD 193-025776-002 HF2K006N 230 2.54 1 60 1625 1/3 040-025779-002 1271 Oil 370 6 MFD 193-302120-011 P55YYBYV-887 460 0.9 3 60 1725 1/3 — — — — — 54 TRANSFORMERS Size Part Number V.A. Rating Voltages Primary Secondary Large4 315-052169-011 970 220, 230, 240, 440, 460, 480 110, 115, 120 315-052169-012 550, 575, 600 110, 115, 120 Small5 315-304252-001 4

B. For ceiling heights of 12 feet or less, maximum mounting height is determined by use of ceiling mounting brackets offered with these heaters. Minimum spacing to ceiling is 14-1/4”. C. In either case the 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 11” minimum. B. Side of case to side wall 12” minimum. 3. If two or more units are operated in the same enclosed space, their discharges should be

Type UB-3502A, UB-4002A, UB-4502A, UB-5002A Forced-Air Heater Figure 1 Figure 2 (Wall Mounted) (Ceiling Mounted) Specifications – Table A Model Volts and Phase kW Horizontal Air Discharge Wt. (Lbs.) UB-3502A 240V, 550V, 575V, 600V (3o) 480V (1o or 3o) 35 54’ 210 UB-4002A 480V (1o or 3o) 550V, 575V, 600V (3o) 40 54’ 210 UB-4502A 480V (1o or 3o) 550V, 575V, 600V (3o) 45 54’ 210 UB-5002A 480V, 550V, 575V, 600V (3o) 50 54’ 210 IMPORTANT WARNING: Hazard of Electric Shock. Disconnect WARNING: Users

DANGER: Hazard of Fire. 2. Do not operate heater in corrosive atmosphere conditions to A. Do not restrict air flow through heater by placing fabric or avoid destructive damage to heater. other obstructions in front of or behind the heater. Increased 3. Avoid operating heater in dusty environment which can foul discharge temperatures can discolor or ignite some heat heater fins to dissipate heat or impair motor ventilation leading sensitive combustible materials. to excessive operating temperatur

1. Connect heater according to the voltage and frequency specified on the nameplate and using the appropriate wiring diagram (Figures 3 thru 11). Note: Be sure to check the voltage rating of the fan motor since it is not necessarily the same as the heater circuit. 2. If an external transformer is used to step down the voltage for operating the fan motor, use appropriate wiring diagram (Figures 8 thru 11). 3. Heaters are not provided with a control switch and should be controlled by externally mo

Key to proper wiring diagram is the part number (P/N) of internal wiring diagram located on inside of the hinged cover of the terminal box. 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. WIRING DIAGRAMS Figure 3 2 WIRING DIAGRAMS Figure 4 Figure 5 3 WIRING DIAGRAMS Figure 6 Figure 7 4 WIRING DIAGRAMS Figure 8

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 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 ele

. *Note: Fuse 3A 600V KTK-3 — 128-047763-007 (2) Fuse BLK Barrier — 129-048475-001 (1) Fuse Block — 129-048473-001 (2) RENEWAL PARTS IDENTIFICATION 9 RELAYS Model Volts Phase kW Motor Relay UB-1002E 208 1 10 120V 072-303180-008 UB-1002E 208 1 10 208V 072-303180-014 UB-1002E 208 3 10 120V 072-303180-007 UB-1002E 208 3 10 208V 072-303180-013 UB-1002E 240 1 10 120V 072-303180-008 UB-1002E 240 1 10 240V 072-303180-014 UB-1002E 240 3 10 120V 072-303180-007 UB-1002E 240 3 10 240V 072-303180-013 UB-100