Chromalox PF490-5 installation instructions Installation, Maximum Out of Plane Allowance

INSTALLATION

FIRE/EXPLOSION HAZARD. Mount only in upright position and observe nameplate mounting clear- ances.

Heater Location instructions:

Arrange units so their discharge air streams:

A.are subjected to a minimum of interference from columns, machinery and partitions.

B.wipe exposed walls without blowing directly at them.

C.are directed away from room occupants in comfort heating.

D.are directed along the windward side when installed in a building exposed to a prevailing wind.

Locate thermostat on interior partition walls or posts away from cold drafts, internal heat sources and away from heater dis- charge air streams.

Small rooms can be heated by one unit heater. Where two walls are exposed, the heater should be mounted as shown in Figure 2. Large rooms require multi-unit installations. Number and capacity of units will be determined by volume of building and square feet of floor area to be heated. Arrange units to pro- vide perimeter air circulation where each unit supports the air stream from another.

The CXH-A hazardous location heaters are designed for use only in a permanently mounted upright position. We recommend

the use of a mounting kit (ceiling, wall or pole) available from Chromalox. (Figures 5, 6 and 7)

The ceiling or wall mounting surface and the anchoring pro- vision must be sufficient to support the combined weights of the unit and mounting hardware.

If using mounting hardware or a supporting structure not supplied by Chromalox, the unit should be suspended from the supporting structure thru the two mounting points on top of the unit with 5/8 NC bolts and lockwashers. If single point mounting is desired, order the correct size Chromalox adapter bracket (P/N 027-302361-001 for 12” fan units, P/N 027-302361-002 for 16” fan units) and P/N 027-302361-003 for 20” fan units. This bracket is designed to hold the unit over its center of gravity with a 1 dia. bolt. The maximum tilt angles as shown in Figure 3 must not be exceeded in either direction during operation and installation. Failure to comply will cause high limit shut down.

	EXPOSED	EXPOSED	EXPOSED
EXPOSED		EXPOSED
		EXPOSED
		Figure 2

Maximum Out of Plane Allowance

1/2" Max	1/2" Max
13mm	13mm

Figure 3

The heaters may be mounted at any convenient height above floor. The minimum spacings shown in Figure 4 should be main- tained to adjacent walls and ceiling. If floor heat is desired, do not mount higher than 8 to 10 feet above floor.

Controlling thermostats to individual heaters should be mounted at shoulder height on inside walls or columns and clear of the discharge air stream of the unit. Allow at least 4 in front of heater for air stream to discharge freely.

Do not mount mercury type thermostat directly on unit, vibration could cause malfunction.

Heater may be mounted on a shelf or stand from the bottom. Be sure that mounting clearances are maintained and that bottom of unit has at least 1 clearance underneath it. This is necessary for good air circulation and servicing of heat exchanger. All mount- ing methods must allow for removal of front cover.

The mounting and anchoring provisions must take into account the unit vibration and cantilevered loading when wall or pole mounted. One of the Chromalox mounting kits shown in Figures 5, 6 and 7 must be used whenever possible.

102mm Min. (4")

Installation Clearances

		102mm
			Min.
5/8 NC (2)		(4")
Thds. For	2"
Mounting

	204mm
	Min.
Figure 4	(8")

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