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4
A.
SPECIAL PRECAUTIONS
1. Disconnect power supply before making wiring
connections to prevent electrical shock and
equipment damage. All units must be wired strictly
in accordance with wiring diagram furnished with
unit.
2. Units should not be installed in atmospheres where
corrosive fumes or sprays are present.
3. Units must not be installed in potentially explosive
or fl ammable atmospheres.
4. Be sure no obstructions block air intake or air
discharge of unit heater.
5. Do not install unit above recommended maximum
mounting heights (see Table 1) or below the
minimum height of eight feet.
II. GENERAL INFORMATION
A. INSTALLATION LIMITATIONS
Installation and service instructions in this manual are
applicable to the steam/hot water unit heaters which
should be installed in their proper applications for their
most effective function as overhead heating units. The
copper coils are warranted for operation at steam or
hot water pressures up to 150 psig, and/or temperatures
up to 375°F. Canadian Standards Association (CSA)
requirements state that explosion-proof units may not
be used with a fl uid temperature in excess of 329°F and
still maintain their explosion-proof rating, for national
electric code ignition temperature rating T3B for grain
dust.
B. INSPECTION ON ARRIVAL
1. Inspect unit upon arrival. In case of damage, report
immediately to transportation company and your
local Burnham Hydronics Representative.
2. Check rating plate on unit and motor to verify that
power input and motor specifi cation meet available
electric power at point of installation.
3. Inspect unit received for conformance with
description of product ordered (including
specifi cations where applicable).
III. INSTALLATION
GNINRAW
DRAUGNAFTELTUOEVOMERTONOD
.STINUVBLEDOMMORF
Figure 1: Horizontal Air Delivery
B. UNIT SUSPENSION
Horizontal Delivery Units, Model BH Series
All horizontal delivery units have two tapped holes
(3/8”-16) in the top for unit suspension. Piping
support hangers or clamps are recommended and
should be placed as close to the unit heater as
possible. For other models, independent suspension
can be made with threaded rods, pipes, or ceiling
hanger brackets.