......................... Page ii Dimensions and Panel Cutout .................................................................................................... ........................ 1 Wiring ......................................................................................................................... .................................................. 2 Hardware Setup .................................................................................................................

MODEL NUMBER DESCRIPTION TABLE 2 CAF-6 B 2 05 11 01 A1 or Refer to CCAS-8 Code Control Options (Factory Installed) Wiring Diagram 00 = No Optional Control A A1 = Built-in SP tamperproof thermostat 120 - 277V C A2 = Built-in DP tamperproof thermostat 120 - 277V E F1 = Built-in SP adjustable thermostat 120 - 277V C F2 = Built-in DP adjustable thermostat 120 - 277V E A4 = Built-in 24V low voltage relay 120 - 277V D A5 = Built-in 24V low voltage relay and transformer 120 - 277V F A8 = Built-in disco

When the floor is to be finished in carpet, allow clearance under the heaters and corners for carpet installation. Bottom air inlet heaters are to be mounted a minimum of 2” from the finished floor. WARNING: Hazard of Fire. Rugs may be placed up to a heater provided that they are not of a thickness that would block the air-intake. Bottom air inlet heaters are to be mounted a minimum of 2” from the finished floor. Figure 1: Furniture & Drapes GENERAL Draft Barrier Heater Installation (Wall) 1. On

Failure to comply can result in explosion or fire. Hazardous area terminal enclosures are available, consult your local Chromalox representative for details. The NWHMTO series is a general-purpose oil circulation heater intended for use indoors. The 3 steel sheathed tubular elements are centered in a 2-1/2” diameter steel heating chamber and welded to a removable screw plug. The assembly is surrounded by 1-1/2” insulation and sheet metal jacket. Depending upon the specifications, the NWHMTO may

No. Plug Fig. No. HF203G AC C 120V1P 1,900 15.8 6 3 HF203G AC C 240V1P 2,000 8.3 6 4 HF303H AC* C 120V1P 3,000 25.0 7 — HF303G AC C 240V1P 3,000 12.5 7 3 HF403G AC C 240V1P 4,000 16.7 7 5 HF203EG DC E 120V1P 1,900 15.8 9 3 HF203DG DC E 240V1P 2,000 8.3 8 4 HF303E DC* E 120V1P 3,000 25.0 12 — HF303DG DC E 240V1P 3,000 12.5 11 4 HF403E DC** E 240V1P 4,000 16.7 11 — * Cord Only, no plug. ** Without Cord and plug. 12-5/8” 11-3/8” 13-3/16” 1” 8” 9-3/4” Figure 2 Figure 2A GENERAL Hazard of Fire or Dis

5. Rough-in wiring to heater. See Table 2 for line amperes, recommended wire size and conduit size. 6. Wire heater per wiring diagram supplied with this instruction sheet. Note: Power relay(s) are provided as standard on all heaters. WARNING: Prior to operating the heater, verify that the fan hub setscrews are tightened and the push-on clip is secured to assure that the fan blade is securely fastened to the motor shaft. 7. Carefully inspect the completed installation. Rotate the fan blade by han

† These models can be field changed from single phase to three phase or three phase to single phase. © 2010 Chromalox, Inc. IMPORTANT Failure to understand and follow these installation instructions and the “WARNING” notes therein may result in serious personal injury from electrical shock, or from the heater failing due to faulty installation. FIRE/EXPLOSION HAZARD. This heater is not intended for use in hazardous atmospheres where flammable vapors, gases, liquids or other combustible atmospher

1 & 2 Class II - Groups E, F & G T3B - 165.C (329.F) Table A – Specifications Model kW Voltage and Phase Horiz. Air Discharge (Ft.) BTUH CFM Wt. (Lbs.) Overall Dimensions (In.) 5/8” UNC Tapped Mounting Hole Locations A B C D E CXH-A-03 3 208/240V-1 or 3O 480/575V-3O 28 10,236 700 127 19-1/8 23-7/8 21 3-1/2 13-5/8 CXH-A-05 5 208/240V-1 or 3O 480/575V-3O 28 17,060 700 127 19-1/8 23-7/8 21 3-1/2 13-5/8 CXH-A-07 7.5 208/240V-1 or 3O 480/575V-3O 32 25,590 840 133 19-1/8 23-7/8 21 3-1/2 13-5/8 CXH-A-1

WIRING DIAGRAMS 3 Use with: UB-1002E 208V, 1O or 3O 240V, 1O 480V, 1O or 3O UB-1252E 208V, 3O 240V, 3O 480V, 1O or 3O UB-1502E 208V, 3O 240V, 3O 480V, 1O or 3O UB-2002E 480V, 1O or 3O 240V, 1O or 3O WIRING DIAGRAMS 4 Use with: UB-1002E-T 480V, 1O or 3O UB-1252E-T 480V, 1O or 3O UB-1502E-T 480V, 1O or 3O UB-2002E-T 480V, 1O or 3O Figure 5 Use with: UB-1002E-R 208V, 1O or 3O 240V, 1O or 3O 480V, 1O or 3O UB-1252E-R 208V, 3O 240V, 3O 480V, 1O or 3O UB-1502E-R 208V, 3O 240V, 3O 480V, 1O or 3O UB-200

*Wall and/or Ceiling Mounting Brackets are Height Above available as an accessory option — ContactFloor 12-1/4” 8” 6” your local sales representative. Specifications — Rubber Feet Provided for Wall Mount Model Only. 7/8” and 1-23/32” Dia. Holes in Rear 13-3/4” 17-1/8” 20-3/4” 11-3/4”9-5/16” Ceiling Line Wall Back Wall 6” Min. Spacing to Adjacent Wall3” 4-7/8” Min. 11-3/4” 17-11/16” 7’-0” Min. Height Above Floor Mounting Holes Center 10” 8” Figure 2 Mounting UB using Wall Mounting Brackets* Model