Installation - Chromalox HVH-02-81 Installation, Operation And Maintenance Manual

NOTICE – These heaters are designed for wall and ceiling mount.
Other modes of mounting void factory warranty.
Vertical Air Flow
1. Height above floor
A. It is recommended that the heater only be used with ceiling
heights of 12 feet or greater. Minimum spacing to ceiling is 6
inches, use 3/8-18" thread stock (supplied by others) as shown
in Figure 3.
B. Mimimum mounting height is 10 feet from floor to bottom of
heater.
2. Spacing to walls.
A. Side of case to wall 6". Top or bottom of case to back wall is
10-1/4" (HVH-02 to HVH-05), 13" (HVH-15 to HVH-20) and
15-1/2" (HVH-25 to HVH-50).
CEILING (Vertical Airflow):
A. The heater can be rod mounted to the ceiling by installing four
(4) threaded mounting rods in the threaded holes located on the
top of the heater as shown in Figure 3. (Refer to Table C for
mounting rod thread size.)
B. Securely attach the four (4) mounting rods to the ceiling. (Re-
fer to Table D for wall and ceiling clearances, and Figure 2 for
mounting spacing specifications.)
3/8-18 THREADED
MOUNTING HOLES
X
CL
TERMINAL BOX
ACCESS DOOR
Back Wall
Figure 3 - Rod Spacing
Table C — Rod Thread Type and Spacing Dimensions (inches) for
Vertical Discharge.
Rod
Unit Thread Type
2-5 kW 3/8-16
7-1/2 - 20 kW 3/8-16
25 - 50 kW 3/8-16
Table D — Clearance Requirements (Vertical Discharge)
Model Back to Wall Side to Wall Top to Ceiling
HVH-02 Thru HVH-05 10-1/4
HVH-07 Thru HVH-20
HVH-25 Thru HVH-50 15-1/2
Horizontal Air Flow
1. Height above floor
A. In areas where ceiling height is more that 12 feet, recommended
mounting height is approximately 10 feet to underside of heater.

insTallaTion

ADDITIONAL THREADED
MOUNTING HOLES FOR
HVH-25 TO HVH-50
X
L2
CL
L1
Dimensions – (In.)
L1 L2
2-7/8 7-1/8 3-3/4
4-5/16 9-3/8 5-1/2
8-15/16 14 9-15/16
Mounting Limitations (In.)
6 6
13 6 6
6 6
Figure 2 - Wall and Ceiling Clearance
TERMINAL BOX
ACCESS DOOR
Figure 4 - Heater Back View
HVH-02 - 05
HVH-07 - 20
HVH-25 - 50
B. For ceiling heights of 12 feet or less, maximum mounting
height is detemined by the use of the mounting bracket offered
for these heaters. Minimum spacing to ceiling is 7-3/4". (See
Figure 5)
C. In either case, the mimimum mounting height is 7 feet from
X
floor to bottom of heater.
2. Spacing to adjacent walls.
A. Rear of case to back wall 2" minimum.
B. Side of case to side wall 6" minimum.
CEILING – Horizontal Airflow (See Figure 5):
The ceiling mounting bracket is fastened to the top of the heater using
the four (4) bolts supplied with the mounting bracket. The bracket is
then mounted to the ceiling using a 5/8" bolt (by others).
WALL – Horizontal Airflow (See Figure 6):
Wall mounting necessitates the use of both an adaptor mounting
bracket and a wall mounting bracket. First, attach the ceiling mounting
bracket to the heater. Then, attach the wall mounting bracket to the
wall using four 5/16" bolts and six 3/8" bolts (by others). Attach the
ceiling mounting bracket on the heater to the wall mounting bracket
using the 5/8" bolt provided.
3
KO FOR POWER WIRING
KO FOR CONTROL WIRING
Knockout Sizes
1/2" 3/4" (1)
1/2" 1" (1)
1-1/4" 2" (1)