Chromalox PG405-5 specifications Installation, Mounting

INSTALLATION

ELECTRIC SHOCK HAZARD. Disconnect all power before installing or servicing heater. Failure to do so could result in personal injury or property dam- age. Heater must be installed or serviced by a qual- ified person in accordance with the National Electrical Code, NFPA 70.

						1/4”	Interlocking Connector
1-	7/8”
			2-3/8”
							Housing
Terminal Cover									Mounting
									Clamp
	Terminal Block								Assembly
					Element
			Polished Aluminum Reflector
	Figure 1 — Heater Parts and Dimensions							3-11/16”

Mounting

1.These radiant heaters are designed for indoor installation only.

2.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 snapping over top of extruded frame section at any point along its length (see Fig. 3). For proper heater support, the max- imum distance between clamps must not exceed 48”. On extra- long heaters, more than two clamps are furnished.

2-3/8”

2-15/16”

3-

Figure 2 Figure 3

3.Mounting Holes — When heaters are mounted adjacent to

each other in the same plane, note that distance between mounting holes on framing to support heaters will be 3-11/16”minimum. When heaters are not in the same plane, i.e. set at an angle to one another, distance between mounting holes in framing will be either greater or less than 3-11/16”.

4.Framing — Where an extensive installation is being made, the use of continuous slot metal framing manufactured by sev- eral concerns will be of assistance in saving time and money. The frame is reusable.

Mounting Frame

Insulation

Reflector

Spacer Sheet

Figure 4

5.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 with local sales representative.

6.Insulation — Where unusually high work temperatures are encountered, it may be desirable to insulate backs of heaters with high-temperature fibrous insulation. A suggested method of accomplishing this is indicated in Fig. 4.

7.Ventilation — Where solvents, water, etc. are being evaporat- ed from work in process, it is necessary to provide substantial quantities of ventilation air to carry away the resulting vapors.

FIRE HAZARD. Since Radiant heaters are capable of developing high temperatures, extreme care should be taken to:

A. Keep combustible materials at least 6” away form sides and back of heater housing and its sup- porting brackets and spaced far enough in front of heater (heating element side) so thermal radiation from the elements will not ignite combustible materials.

B. If combustible materials are being processed, stoppage of process should initiate immediate heater shutdown and interception of residual heat from radiant heaters (use radiation baffles or move heaters away from work).

C. 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, refer to NFPA 86, Standard for Ovens and Furnaces.