Burnham BH-33, BH-47, BH-63, BH-86, BH-108 Installation & Service Instructions Manual
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TABLE OF CONTENTS
I. PRECAUTIONS - IMPORTANT INFORMATION .................................................3
II. GENERAL INFORMATION
A. Installation Limitations ..............................................................................................4
B. Inspection on Arrival .................................................................................................4
III. INSTALLATION
A. Special Precautions ....................................................................................................4
B. Unit Suspension ........................................................................................................4
C. Unit Heater Mounting Height ....................................................................................5
D. Piping Installation ......................................................................................................5
E. Wiring Instructions .....................................................................................................5
IV. OPERATION
A. Prior to Operation ......................................................................................................8
B. Initial Start-up ............................................................................................................8
V. MAINTENANCE
A. Regular Inspection .....................................................................................................9
B. Motors ........................................................................................................................9
C. Casings .......................................................................................................................9
D. Coils ...........................................................................................................................9
VI. APPLICATION GUIDELINES
A. General Guidelines ..................................................................................................10
B. Steam Performance Data .........................................................................................11
C. Selection Procedure - Steam Application ................................................................12
D. Steam Calculation Formulas ....................................................................................13
E. Steam Correction Factors .........................................................................................14
F. Hot Water Performance Data ....................................................................................17
G. Selection Procedure - Hot Water Application ..........................................................18
H. Hot Water Calculation Formulas .............................................................................19
I. Hot Water Correction Factors ...................................................................................20
VII. OPTIONS, ACCESSORIES AND CONTROL SEQUENCES
A. Field Installed Options for Horizontal and Vertical Models ....................................21
B. Control Sequences ...................................................................................................21
C. Field Installed Options for Horizontal Models Only ...............................................21
D. Field Installed Options for Vertical Models Only ...................................................22
VIII. DIMENSIONAL DATA
A. BH Dimensional Data ..............................................................................................25
B. BV Dimensional Data ..............................................................................................26
IX. MOTOR DATA ...........................................................................................................27
WARRANTY ................................................................................................Back Cover
2
I. IMPORTANT INFORMATION - READ CAREFULLY BEFORE INSTALLATION
The following terms are used throughout this manual to bring attention to the presence of hazards of various risk levels, or to
important information concerning product life.
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3
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.
GNINRAW
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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
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.
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.
Figure 1: Horizontal Air Delivery
4
Vertical Delivery Units, Model BV Series
Models BV-42 through BV-161 have 4 tapped holes
(1/2”-13) on the top surface for unit suspension.
Suspension can be made with threaded rods, pipes,
or ceiling hanger brackets. Models BV-193 through
BV-610 have angle-iron frame mounting brackets for
heavy-duty installation with applicable hardware.
No Defl ector
accessories. Locate horizontal delivery unit heaters so
air streams of individual units wipe the exposed walls
of the building with either parallel or angular fl ow
without blowing directly against the walls. Heaters
should be spaced so the air stream from one supports
the air stream from another heater. Locate vertical
delivery unit heaters in the center area of the space to
be heated, using horizontal delivery unit heaters along
the walls where heat loss is usually greatest.
D. PIPING INSTALLATION
Horizontal and Vertical Unit Heaters
Note: Only make piping connections using two (2)
pipe wrenches. One wrench is used as a “back-up”
while the other wrench is used for applying force
necessary to tighten the fi tting.
Two-Way Louver
4-Cone Anemostat
Truncone
Figure 2: Vertical Air Delivery
C. UNIT HEATER MOUNTING HEIGHT
Do not install unit above recommended maximum
mounting heights or below the minimum height of eight
feet. The height at which unit heaters are installed is
critical. Maximum mounting heights for all units are
listed in Table 1. Maximum mounting heights for Model
BV is given for units with or without air diffusion
The illustrations, on page 6, suggest four (4) different
piping confi gurations. Refer to the ASHRAE Guide &
Specialty Manufacturer for selection of fi lter, piping
traps and other specialty sizing. Piping is typical for
unit heaters.
E. WIRING INSTRUCTIONS
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 (Figure 3).
2. All wiring must be done in accordance with the
National Electric Code and applicable local codes.
In Canada, wiring must conform to the Canadian
Electric Code. It is recommended that all wiring be
adequately grounded.
3. Electric wiring must be sized to carry the full load
amp draw of the motor, starter, and any controls that
are used with the unit heater. Overcurrent protectors
should be sized based on motor current rating shown
on the unit serial plate, and applicable national
electric code procedures.
4. All units should be installed with an electrical
junction box. Junction boxes are either integral to
the motor or to be attached to the unit casing. Units
with explosion-proof motors have an explosionproof junction box attached to the motor. Any
damage to or failure of Burnham Hydronics heater
units caused by incorrect wiring of the units is not
covered by Burnham Hydronics standard warranty.
5
Figure 3: 115V / 60Hz / 1PH Wiring Schematic
6
Table 1: Recommended Maximum Mounting Height
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81-HB971 24-VB117151118 913111822822882
42-HB981 95-VB3102813195261410182982853
33-HB0102 87-VB412291411162715111031103803
74-HB2152 59-VB614212611162715111031103803
36-HB4192 931-VB817242813123128131633163954
68-HB5113 161-VB1213821241533202410441040105
801-HB5123 391-VB3243133261935222514461442155
121-HB6133 212-VB5273335261935222514461442155
561-HB7143 742-VB6293436271640362812571253156
391-HB8173 972-VB0354730381355303120681063157
852-HB9104 333-VB0354730371355303120671063157
092-HB0244 583-VB0354630371355303120671063157
043-HB0264 005-VB7365447391562473624791473139
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Horizontal Unit Heater Connected to
Overhead Hot Water Mains
Vertical Unit Heater Connected to
Overhead Hot Water Mains
Figure 4: Hot Water System Piping
Unit Heater Connection for High Pressure Steam
Unit Heater Connection for Low Pressure Steam - Open Grav-
ity or Vacuum Return System
Figure 5: Steam System Piping
7
IV. OPERATION
A. PRIOR TO OPERATION
1. Check all electrical connections to assure they are
secure.
2. Check rigidity of unit mounting. Tighten all
fasteners, if necessary.
3. Inspect piping, strainers, traps, fi ttings, etc.
B. INITIAL START-UP
1. Set thermostat to lowest position.
2. Turn on power supply to unit.
3. Open return gate valve, and then open supply gate
valve to unit.
4. Raise thermostat setting to desired position.
5. Adjust louvers (if provided) for desired heat
distribution.
6. To insure proper sequence of operation, cycle unit
on and off a few times by raising and lowering
thermostat setting.
7. Check for proper rotation of fan. All fans must rotate
in a counterclockwise direction when viewed from
the back (BH) of the unit heater.
8
V. MAINTENANCE
INSPECT REGULARLY
A.
Under average conditions, it is recommended that
unit heaters be inspected before every heating season
— more often in locations where air is contaminated
with corrosive fumes, dust, soot or oil spray. Check
for dirty, clogged coils, excessive vibration and loose
connections. Inspect piping, strainers, traps, fi ttings, etc.
B. MOTORS
1. Cleaning
Remove grease and dirt on motor during each
inspection or lubrication. Open frame motors should
be blown clean every heating season, or whenever
coils are cleaned, whichever is sooner.
2. Lubrication
Lubricate motor according to manufacturer’s
instructions located on the motor. When no motor
oiling instructions are on the motor, oil the motor
every two thousand hours of operation with SAE20
motor oil for units in normal applications. Adjust
oiling according to usage and atmosphere. Some
motors do not have oil fi ttings. These motors are
lubricated for long life and do not require further
lubrication.
3. Overload Protection
A change in line voltage higher or lower than motor
nameplate rating may cause overheating and serious
motor damage. Check plant voltage conditions.
A separate manual starter with thermal overload
protection device is recommended for those units
that do not have motors with built in overload
protection.
C. CASINGS
1. Cleaning
Periodic cleaning of casings is recommended to
remove dirt, grease and corrosive substances that
may injure fi nish. Rusted or corroded spots should
be cleaned and repainted.
2. General Inspection
Tighten fan guard and motor bracket. Check fan for
proper clearance, free rotation and fi rm connection
to shaft. When servicing is complete, tag unit to
indicate date of inspection, lubrication and cleaning.
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D. COILS
1. Cleaning
Clean coil at least once a year, more often under
unfavorable conditions. Unless coil is kept
reasonably free of dirt, lint and grease, its original
heating capacity will be reduced — possibly to a
serious degree, and motor damage may result.
Two commonly used cleaning methods are:
a. Loosen dirt by brushing fi ns on side where air
enters coil and then turn on fan to blow dirt from
unit.
b. Use high-pressure air hose to loosen dirt by
blowing from side where air leaves coil (side
adjacent to louvers on blow-through units (BH);
side adjacent to fan on draw-through units (BV)).
For thorough cleaning of coil, remove motor and
fan and spray a mild alkaline cleaning solution
over the coil. After a few minutes, follow by a
hot water rinse. (A steam gun can be used for
spraying cleaning solution and hot water.) Coils
subjected to corrosive fumes should be checked
and cleaned frequently.
2. Internal Corrosion Safeguards
Provide controlled water treatment -- don’t use
excess of boiler compounds. Contact your boiler
compound supplier for proper usage or the services
of a water treatment laboratory. Periodic internal
fl ushing of the coils is recommended in areas where
water supply is suspected of causing scale. Use an
alkaline-chelant solution and introduce it at the main
pump of the hydronic system. Flush thoroughly.
GNINRAW
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De-aerate boiler feed-water (particularly if large
amount of new water is used). Insure rapid continuous
and adequate condensate drainage by properly sized
and installed traps and piping. Check traps for sticking.
Clean strainers ahead of traps. (When traps don’t work,
condensate accumulates in unit heater coil; water
hammer results.) Adequately vent each unit. Use lowpressure steam when possible.
9
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