Do not mount adjacent to space around wires in the conduit with rock wool. a large magnetic contactor, as vibration and shock will cause thermostat to interact erratically – resulting in chattering of the contactor. WARNING: Do not twist or uncoil the coiled element on top of the case. The proper location of a heavy duty room thermostat is important to assure good performance. 1. Locate where air circulates freely. 2. Never install on or near outside wall. 3. Keep away from windows or doors. 4.

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

Volts kW Overall Length Heated Length RADD-2164 120 or 240 1.6 24-3/8 16-1/2RADD-2164V 208 or 275 RADD-3224 120 or 240 2.2 30-5/8 22-3/4RADD-3224V 208 or 275 RADD-3264V 208 or 275 2.6 35-7/8 28-5/16RADD-3264 240 or 480 RADD-4364V 208 or 275 3.6 46-5/8 38-1/2RADD-4364 240 or 480 RADD-5434V 208 or 275 4.3 53-7/8 45-7/16RADD-5434 240 or 480 RADD-5504V 208 or 275 5.0 61-3/8 53-3/8RADD-5504 240 or 480 RADD-6544V 208 or 275 5.4 65-7/8 58-1/4RADD-6544 240 or 480 RADD-6604V 208 or 275 6.0 73-3/4 65-3/4R

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

mounted to a heavy gauge metal terminal box. Due to the various options and materials available, check the IMPORTANT — Observe at least one complete heating cycle nameplate attached to the heater terminal box with the catalog operation before leaving the installation. number designation system on page 7 before installing to insure the heater you received conforms to your specification. © 2010 Chromalox, Inc. Duct Heater4 Ft. Min. Air HandlerAirFlow GENERAL Limitations: Ductwork must be in accord

3O Circuits Dimensions (In.) A B C D E NWHO-4590 NWHO-45125 NWHO-45150 NWHO-45175 NWHO-45200 240 or 480 240 or 480 240 or 480 240 or 480 240 or 480 90 125 150 175 200 5 5 5 5 5 721/2 871/2 1021/2 1171/2 125 251/2 251/2 251/2 251/2 251/2 635/8 785/8 935/8 1085/8 1161/8 1813/16 1813/16 1813/16 1813/16 1813/16 121/2 121/2 121/2 121/2 121/2 NWHO-77220 NWHO-77225 NWHO-77250 240 or 480 240 or 480 240 or 480 200 225 250 6 6 6 971/2 1051/2 1131/2 273/4 273/4 273/4 885/8 965/8 1045/8 19 19 19 133/4 133/4

3. Power controllers must be used when heaters are rated 3 phase and when the heater amperage exceeds the rating of the thermostat. 4. Refer to Wiring Diagram, Table B, for the proper wiring diagram for connecting heater. Model 240V, 1 O Fig. 240V, 3 O . Fig. 480V, 1 O . Fig. 480V, 3 O . Fig. NWH-3625 NWH-3925 NWH-31225 NWH-31525 NWH-31825 2 2 2 2 2 1 1 1 1 1 2 2 2 2 2 1 1 1 1 1 Figure 1 240V, 480V 3O. Figure 2 240V, 480V, 1O Use contactor when the heater amperage exceeds the rating of the therm

Any damage claims hazardous atmospheres where flammable vapors, should be entered immediately with the carrier. gases, liquids or other combustible atmospheres are present as defined in the National Electrical Code. Failure to comply can result in explosion or fire. 19” Min. 6” to floor min. 5” 4” B B B A 1” min. 10” 16” 3” Specifications Model Voltage Wattage Phase Dimensions (In.) A B ICH-18025 120, 208, 240, 277 250 1 18 12 ICH-28050 500 1 28 22 ICH-38075 750 1 38 16 ICH-45100 1000 1 48 14 IC

Minimum capillary tube bending diameter is 1/2” I.D. (see Figure 4). Figure 3 (Sensing Bulb) 1” Do Not Bend or Kink Crimped End 1/2” Rod Figure 4 (Capillary Tube) C. Any deformations of bulb or capillary that result in leakage of fluid from control renders control inoperative. D. Avoid passing control capillary tube through zones whose temperature is in excess of controlled process temperature. Erratic control or destruction of control function may result. WIRING ELECTRIC SHOCK HAZARD. Disconect

Failure to do so could result in personal injury or property damage. Fan switch must be installed by a qualified person in accordance with the National Electrical Code, NFPA 70. This fan switch kit can be used on all 208, 240 and 277 Volt LUH/KUH heaters with single or 3 phase motors for fan only operation. See Model Number list on page 2. For all 480 Volt LUH/KUH heaters, the summer fan switch and relay option must be used (see PF481). INSTALLATION The kit comes complete with all necessary wiri