Not Be Installed Where They May Be Exposed To A Potentially; Explosive Or Flammable Atmosphere; Unit Location; Unit Mounting - Modine Manufacturing HSB Installation And Service Manual

UNIT LOCATION / UNIT MOUNTING

UNIT LOCATION

dANgeR
Appliances with power codes 01, 02, 04, 05, and 10 must

not be installed where they may be exposed to a potentially

explosive or flammable atmosphere.

1. Units should not be installed in atmospheres where
corrosive fumes or sprays are present.
2. Be sure no obstructions block air intake or air discharge of
unit heater.
3. Locate horizontal delivery unit heaters so air streams of
individual units wipe the exposed walls of the building
with either parallel or angular flow without blowing directly
against the walls. Heaters should be spaced so the air
stream from one supports the air stream from another
heater. See Figure 3.1.
4. Columns, machinery, partitions, and other obstacles should
not interfere with air streams from unit heaters.
5. Unit heaters installed in a building exposed to a prevailing
wind should be located to direct a major volume of heated
air along the windward wall of the building.
6. Large expanses of glass, or large doors that are frequently
opened, should be covered by long-throw unit heaters such
as large horizontal delivery of "Power-Throw" unit heaters.
7. Vertical delivery unit heaters should generally be located in
the central area of the space to be heated. Place horizontal
delivery units along the walls of the same building where
heat loss is usually greatest. See Figure 3.3.
8. Arrange horizontal delivery units so they do not blow directly
at occupants. Air streams from this type of unit should be
directed down aisles, into open spaces on the floor, or along
exterior walls.
9. When only vertical delivery units are installed, they should
be located so exposed walls are blanketed by their air
streams. See Figure 3.2.
figure 3.1 - Horizontal Delivery Unit Location
figure 3.2 - Unit Locations of Vertical Units In
Narrow Buildings
figure 3.3 - Combination Horizontal and Vertical
Delivery Unit Installation

UNIT MOUNTING

CAuTION
Do not install units below 8 feet measured from the bottom of
the unit to the floor.
Do not install unit above recommended maximum mounting
heights. Height at which unit heaters are installed is critical.
Maximum mounting heights for all units are listed in Table 4.1
and the height dimensions are shown in Figures 4.3 through
4.7. Maximum mounting heights for vertical models are given
for units with or without optional air deflectors. The data in
Table 4.1 is based on operating conditions of 2 lbs. steam or
220°F entering water with 60°F entering air. When operating
conditions are other than those above, refer to Figure 4.2 for
maximum mounting height correction factor. To obtain the
maximum mounting at actual operating conditions, multiply
the appropriate factor from Figure 4.2 by the mounting height
in Table 4.1. The maximum mounting height for all units is that
height above which the unit heater will not deliver heated air
to the floor at standard rating conditions.
Deflector Mounting
If an optional air deflector has been furnished for vertical units,
it is always shipped separately and can be attached to the unit
before suspension. Vertical louvers for horizontal units and
horizontal louvers for "Power-Throw" units can also be added
and positioned before installation. Cone-jet and louver-type
deflectors must be attached with angle brackets and machine
screws to the bottom cover of the unit. Refer to mounting
instructions which are furnished with each deflector.
Depending on supply or return piping arrangement, there is
a possibility of interference between certain anemostat air
deflectors and piping on some vertical air delivery unit heaters.
Check dimensions.
1-550.28
3