Chromalox DU-RAD-458 6.04 757 specifications Installation, Mounting, Before Installing, Dimensions

INSTALLATION

The system designer is responsible for the safety of this equipment and should install adequate back-up controls and safety devices with their electric heating equipment. Where the conse- quences of failure could result in personal injury or property damage, back-up controls are essential.

Before Installing

1.Open carton and remove heater at the place of installation. Mounting clamps are in parts bag in carton.

2.Check nameplate volt and watt rating against your power supply voltage and heating requirements of your installation. This name- plate of the complete assembly is located on the back of the heater housing. Note: Single element heaters have one nameplate. Three element heaters have four nameplates (one for each element and one for the complete assembly).

Housing

17/8 "

Mounting Clamp

Assembly

		Terminal
	Terminal
		Blocks
	Cover
			Element
Figure 1 — Heater Parts			Polished Aluminum
				Reflector
and Dimensions

MOUNTING

FIRE HAZARD. Since heaters are capable of devel- oping high temperatures, extreme care should be taken to maintain adequate spacing between heater and combustible materials. Failure to comply can result in personal injury or property damage.

Mounting

1.Clamps — Heaters are mounted by means of the mounting clamp and 3/8” bolt assembly which is used as shown in Fig. 2. Clamp assembly may be attached to heater by sliding over end or by snap- ping over top of extruded frame section at any point along its length. (see Fig. 3) For proper heater support, the maximum dis- tance between clamps must not exceed 48”. On extra-long heaters, more than two clamps are furnished.

215/16 "

23/8"

3 11/16 "

Figure 2 Figure 3

2.Mounting Holes — When heaters are mounted adjacent to each other in the same plane, the minimum distance will depend on whether the wiring to the center element enters the terminal box through the connector furnished or through a right angle connector (not furnished).

3.Framing — Where an extensive installation is being made, the use of continuous slot metal framing manufactured by several con- cerns will be of assistance in saving time and money. The framing is reusable.

Mounting Frame

Insulation

Reflector

Spacer Sheet

Figure 4

4.Reflector Spacer Sheets — Where heaters are not mounted side by side (see Fig. 4), reflector spacer sheets can be used between heaters. These reflector spacer sheets and companion reflectors consisting of an extruded aluminum housing with reflector sheet and mounting clamps are available. Check factory or local Chromalox Sales and Application Engineers.

5.Insulation — Where unusually high work temperatures are encountered, it may be desirable to insulate with high temperature insulation. Note: An air space should be left between backs of heaters and insulation. (see Figure 4)

6.Ventilation — Where solvents, water, etc. are being evaporated from work in process, it is necessary to provide substantial quanti- ties of ventilation air to carry away the resulting vapors.

IMPORTANT –

In the case of solvents of an explosive nature, ventilation air must be in sufficient volume to dilute the solvent vapor so that explosive mixtures cannot occur. In order to comply with the standards of safety required by the insurance companies, ventilation protection and other facilities must be in accordance with NFPA Bulletin No. 86, entitled “Standard for Ovens and Furnaces”. This Bulletin may be obtained from the Association at 470 Atlantic Avenue, Boston Mass., 02110

FIRE/EXPLOSION HAZARD. This heater is not intended for use in hazardous atmospheres where flammable vapors, gases, liquids or other com- bustible atmospheres are present as defined in the National Electrical Code. Failure to comply can result in personal injury or property damage.

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