Chromalox specifications UB-502Dand UB-752D, Mounting, Dimensions, Specifications, Date July

Installation, Operation

and

RENEWAL PARTS IDENTIFICATION

SERVICE REFERENCE

DIVISION 4		SECTION UB
SALES	(Supersedes PF416-12) PF416-13
REFERENCE
	161-048444-001

DATE JULY, 2002

UB-502D and UB-752D

Forced-Air Heaters

Dimensions —
11-5/8”	13-5/8”
17-3/16”
	8”
	6”
7-9/16”	8-7/8”
Rubber Feet Provided for	7/8” and 1-13/32”
	Dia. Holes in Rear
Wall Mount Units Only.
	Figure 1
	Mounting UB using ceiling
	mounting brackets*

For Lower Height from Ceiling: Customer to add Extension Strap.

11-7/8”

7’-0” Min. Height

Above Floor

		Ceiling Line
			6” Min. Spacing to
Back	3”		Adjacent Wall

Wall
	4-7/8”
		Wall
Mounting
Holes
Center

8”

	6”
			15-9/16”
		Figure 2
				7’-0” Min. Height
Mounting UB using wall					Above Floor
	mounting brackets*

*Wall and/or Ceiling Mounting Brackets are available as an accessory option — Contact local sales representative.

Specifications —

			Horizontal
Model	Voltage and Phase	kW	Air Discharge
			(Ft.)
UB-502D	120 (1ø); 208, 240 or 480 (1ø or 3ø)	5	12.5
UB-502D-R	208, 240 or 480 (1ø or 3ø)	5	12.5
UB-752D	120 (1ø); 208, 240 or 480 (1ø or 3ø)	7.5	13
UB-752D-R	208, 240 (3ø); 480 (1ø or 3ø)	7.5	13

‡Model Numbers with suffix “T” added (480 volts only) are equipped with a transformer, 480V Primary — 120/240V Secondary.

‡Model Numbers with suffix “R” added are equipped with a relay.

MOUNTING

WARNING: Hazard of Electric Shock. Disconnect all power before installing heater.

Note: These heaters are designed for wall or ceiling mounting only. Other modes of mounting voids factory warranty.

1.Height above floor

A.In areas where ceiling height is more than 12 feet, recom- mended mounting height is approximately 10 feet to under- side of heater.

B.For ceiling heights of 12 feet or less, maximum mounting height is determined by use of ceiling mounting brackets offered for these heaters. Minimum spacing to ceiling is 3” (see Figure 2).

C.In either case, minimum mounting height is 7 feet from floor to bottom of heater. (See Figures 1 and 2.)

2.Spacing to adjacent walls

A.Rear of case to back wall 4-7/8” minimum (see Figure 2).

B.Side of case to side wall 6” minimum (see Figure 2).

3.If two or more units are operated in the same enclosed space, their discharges should be directed to aid in development of mass air movement for uniform heat dispersal.

4.Controlling thermostats to individual heaters should be mounted at shoulder height on inside walls or columns.

© 2010 Chromalox®, Inc.