2-506.14
In locating heaters, consider general space-heating requirements
of the area. Unit heaters should be located so that exposed walls
are blanketed with warm air. In multiple unit installations, arrange
units so that the air discharge pattern of one unit overlaps the next
unit thus encompassing the area (See Fig. 3.1 & 3.2). Interference
of air streams by columns, beams, partitions or other obstructions
should be avoided as much as possible.
Locating Unit Heaters
Figure 3.1 - Typical Unit Locations for Horizontal
Air Delivery
Figure 3.2 - Typical Unit Locations for Vertical Delivery
INSTALLATION
Table 3.1 - Maximum Mounting Heights/Spreads (feet)
➀
➀
The maximum mounting heights consider air delivery to be from the bottom of
the unit to the floor based on conditions in Table 6.2. Refer to Figure 3.3.
It is recommended that adequate service access in excess of
18 inches be provided for the motor and fan.
Vertical Delivery
No Deflector
Truncone
Cone Jet
Louvers
Model
Blades Open Blades Open Blades 45°
H S H S H S H S H S
VE50 13 20 9 24 18 23 15 13 8 23
VE75 11 17 8 20 15 20 13 11 8 20
VE100 12 18 8 22 17 22 14 12 8 22
VE150 17 26 11 30 23 30 20 17 10 30
VE200 20 30 13 36 27 35 23 20 12 35
VE250 17 26 11 31 23 31 20 18 10 31
VE300 20 31 15 36 28 36 24 21 12 36
VE400 18 27 13 32 24 32 21 18 11 32
VE500 16 24 12 29 22 29 19 16 10 29
Height at which unit heaters are installed is critical. Maximum
mounting heights for vertical units are listed in Table 3.1.
Maximum mounting heights for PTE units are listed in
Figure 4.2. The maximum mounting height for any unit is that
height above which the unit will not deliver heated air to the floor.
The maximum mounting heights must not be exceeded in order
to assure maximum comfort.
WITH CONE-JET
WITHOUT DEFLECTOR
S
H
S
S
H
H
T
T
H
H
S
H
WITH LOUVERS
WITH TRUNCONE
Figure 3.3 - Vertical Delivery Heat Spread/Throw
Unit Mounting
CAUTION
1. Do not install VE type unit heaters closer than 18 inches from
ceiling and 24 inches horizontally from combustible materials in
any direction. PTE units must be at least 24 inches from ceiling
and 18 inches horizontally from nearest enclosure. The bottom
of the unit must be at least 8 feet above the floor.
2. The bottom of the appliance must be at least 8 feet above
the floor.
3. Do not attach duct work, air filters, or polytubes to any
appliance.
If necessary, select the correct deflector assembly to
accommodate the area being covered. Note the louver deflector
data in the table is listed with louvers fully open and with
adjusting vanes set at a 45-degree angle. For these deflectors,
vane adjustment provides a greater spread but requires a lower
mounting height. As indicated, truncone deflectors allow the
lowest mounting height and provide the widest heat spread.
Figure 3.4 - Vertical Deflector Dimensions
TRUNCONE
CONE-JET
LOUVERS
M
X
L
T
P
Z
If an optional air deflector has been furnished for vertical units it is
always shipped separately and may be attached to the unit before
suspension. Louvers on horizontal units may also be added
and positioned before installation. Refer to the latest revision of
75-550 for installation instructions for the optional air deflector
assemblies.
Table 3.2 - Vertical Deflector Dimensions (inches)
Model
Truncone Cone-Jet
Louvers
No.
M X L T P Z
VE50-VE250
12 1/2
22
6 1/2
18 7/8
6 1/2
16 7/8
VE300-VE-500
12 1/2
27
7 1/2
24 3/4
7 1/2
19 3/4
3
