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Installation
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).
Figure 2 - Wall and Ceiling Clearance
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 mount-
ing rod thread size.)
3/8-18 THREADED
MOUNTING HOLES
CL
Figure 3 - Rod Spacing
B. Securely attach the four (4) mounting rods to
the ceiling. (Refer to Table D for wall and ceiling
clearances, and Figure 2 for mounting spacing
specifications.)
ADDITIONAL THREADED
MOUNTING HOLES FOR
HVH-25 TO HVH-50
X
X
L2
CL
L1
TERMINAL BOX ACCESS
DOOR
Back Wall
TERMINAL BOX
ACCESS DOOR
Figure 4 - Heater Back View
Knockout Sizes
HVH-02 - 05
HVH-07 - 20
HVH-25 - 50
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
HVH-02 thru HVH-05
HVH-07 thru HVH-20
HVH-25 thru HVH-50
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.
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. Mini-
mum spacing to ceiling is 7-3/4". (See Figure 5)
C. In either case, the mimimum mounting height is 7
feet from 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.
5
KO FOR POWER WIRING
KO FOR CONTROL WIRING
1/2"
3/4" (1)
1/2"
1" (1)
1-1/4"
2" (1)
Dimensions – (In.)
L1
L2
2-7/8
7-1/8
4-5/16
9-3/8
8-15/16
14
9-15/16
Mounting Limitations (In.)
Back to
Side to
Top to
Wall
Wall
Ceiling
10-1/4
6
13
6
15-1/2
6
X
3-3/4
5-1/2
6
6
6
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Troubleshooting
