Superior REX RBH Series User manual

RBHO
RBHR
RBHC
www.superiorrex.com
RBH Installation Manual
FAN COIL UNITS HORIZONTAL LOW PROFILE
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Table Of Contents...........................................................................................................2
Safety Symbols...............................................................................................................3
Safety Considerations ....................................................................................................3
Section One - Receipt & Initial Installation .........................................................................4
RBH Series Features......................................................................................................4
Preface ...........................................................................................................................4
Unpacking & Inspection..................................................................................................5
Handling & Installation....................................................................................................5
Drain Pan....................................................................................................................6
Coils............................................................................................................................6
RBH Series Dimensional Data .......................................................................................9
AHRI Standard Ratings ................................................................................................10
Cooling/Heating Medium Connections .........................................................................10
Auxiliary Drain Pans .....................................................................................................11
Heating Capacity ..........................................................................................................11
Condensate Trap ......................................................................................................12
Ductwork Connections..................................................................................................12
Electrical Connections..................................................................................................12
Electrical Enclosure ..................................................................................................13
Telescoping Bottom Panel............................................................................................13
Model RBHR Horizontal Fan Coil Optional Telescoping Bottom Panel Assembly,
Typical Installation Instructions.................................................................................14
Model RBHR Horizontal Fan Coil Optional Telescoping Bottom Panel Assembly .......15
Section Two - Start-Up .....................................................................................................16
General.........................................................................................................................16
Cooling/Heating System...............................................................................................16
Air System Balancing ...................................................................................................16
Water System Balancing ..............................................................................................17
Controls Operation .......................................................................................................17
Motor And Fan Data .....................................................................................................17
Section Three - Normal Operation & Periodic Maintenance.............................................18
General.........................................................................................................................18
Motor/Blower Assembly................................................................................................18
Fan Deck ..................................................................................................................18
Coil ...............................................................................................................................18
Electric Resistance Heater Assembly...........................................................................18
Electrical Wiring & Controls..........................................................................................19
Valves & Piping.............................................................................................................19
Filters, Throwaway .......................................................................................................19
Unit Weight Data (Lbs.) ................................................................................................20
Drain.............................................................................................................................20
Replacement Parts.......................................................................................................20
Example Wiring Diagrams............................................................................................21
Section Four - Inspection & Start-Up Checklist ................................................................23
Table of Contents

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SAFETY SYMBOLS
The following symbols are used in this document to alert the reader to areas of potential hazard:
note
caution
warning
danger
indicates an imminently hazardous situation which, if not avoided,
will result in death or serious injury
indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury
identifies a hazard which could lead to damage to the machine,
damage to other equipment and or environmental pollution. Usually
an instruction will be given, together with a brief explanation
is used to highlight additional information which may be helpful to
you
The equipment covered by this manual is designed for safe and reliable
operation when installed, operated, and maintained within its’ design
specications. To avoid personal injury or damage to equipment or
property during installation, operation, and maintenance of this equipment,
it is essential that these functions be performed by qualied, experienced
personnel using good judgment and safe practices. See the following
cautionary statements.
danger
ELECTRICAL SHOCK HAZARDS. All power must be
disconnected prior to installation and servicing of this
equipment. More than one power source may be present.
Disconnect all power sources to avoid electrocution or shock
injuries.
danger
MOVING PARTS HAZARDS. Power must be disconnected
from the motor and blower prior to opening access panels.
Motors can start automatically,and more than one power
source maybe present. Disconnect all power and control
circuits prior to servicing to avoid serious crushing or
dismembering injuries
danger
HOT PARTS HAZARDS. Hot water and steam heating coils
operate at temperatures that will cause severe burn injury.
Some systems will continue to allow circulation of hot water,
even with all control circuits deenergized. Before performing
service at or near any heating coil, piping, or valve package
component, disconnect all power and close all isolation
valves, and allow the equipment to cool. As previously
mentioned, more than one power source may be present.
danger
Electric resistance heating elements may start automatically.
Disconnect all power and control circuits, and allow the
elements to cool before servicing. Again, more than one
power source may be present.
danger
Check that the unit assembly and component
weights can be safely supported by rigging and
lifting equipment.
warning
All assemblies must be adequately secured
during lifting and rigging by temporary supports
and restraints until equipment is permanently
fastened and set in its nal location.
warning
All unit temporary and permanent supports must be
capable of safely supporting the equipment’s weight
and any additional live or dead loads that may be
encountered. All supports must be designed to
meet applicable local codes and ordinances.
warning
All fastening devices must be designed to
mechanically lock the assembly in place without the
capability of loosening or breaking away due to
system operation and vibration.
caution
Secure all dampers when servicing damper,
actuator or linkages. Dampers may activate
automatically, disconnect control circuits to avoid
injury.
caution
Protect adjacent ammable materials when
brazing, Use ame and heat protection barriers
where needed. Have re extinguisher available
and ready for immediate use.
caution
Never wear bulky or loose tting clothing when
working on any mechanical equipment. Gloves
should only be worn when required for proper
protection from heat or other possible injury. Safety
glasses or goggles should always be worn when
drilling, cutting,or working with chemicals such as
refrigerants or lubricants.
caution
Never pressurize any equipment beyond specied
test pressures. Always pressure test with some
uid or inert gas such as clear water or dry nitrogen
on refrigeration systems to avoid possible damage
or injury in the event of a leak or component failure
during testing.
caution
The manufacturer assumes no responsibility for
personal injury or property damage resulting from
improper or unsafe practices during the handling,
installation, service, or operation of any equipment.

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SECTION ONE - RECEIPT & INITIAL INSTALLATION
RBH Series Features
PREFACE
Superior Rex fan coils represent a prudent investment which can, with
proper installation,operation, and regular maintenance, give trouble-
free operation and long service. Your equipment is initially protected
under the manufacturer’s standard warranty; however, this warranty is
provided under the condition that the steps outlined in this manual for
initial inspection, proper installation, regular periodic maintenance, and
everyday operation of the equipment be followed in detail. This manual
should be fully reviewed in advance of any actual work being done on the
equipment. Should any questions arise, please contact your local Sales
Representative BEFORE proceeding. The equipment covered by this
manual is available with a vast variety of options and accessories. Consult
the approved unit submittal, order acknowledgment, and other manuals
for details on the options and accessories provided with the equipment on
each project.
caution
No attempt should be made to handle, install, or service
any unit without following safe practices regarding
mechanical equipment.
caution
All power must be disconnected before installation or
service should be attempted. More than one power source
may be supplied to a unit. Power to remote mounted control
devices may not be supplied through the unit. Never wear
bulky or loose tting clothing when working on mechanical
equipment. Gloves should only be worn when required for
proper protection from heat or other possible injury. Safety
glasses or goggles should always be worn when drilling,
cutting,or working with chemicals such as refrigerants or
lubricants.

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caution
Never pressurize any equipment beyond specied
operating pressures. Always pressure test with some inert
uid or gas such as clear water or dry nitrogen to avoid
possible damage or injury in the event of a leak or
component failure during testing
caution
Always protect adjacent ammable material when welding
or soldering. Use suitable heat shield material to contain
sparks or drops of solder. Have re extinguisher available
for use when welding or brazing.
The manufacturer assumes no responsibility for personal injury or
property damage resulting from improper or unsafe practices during the
handling, installation, service, or operation of any equipment.
UNPACKING & INSPECTION
All units are carefully inspected at the factory throughout the manufacturing
process under a strict detailed quality assurance program, and where
possible, all major components and subassemblies are carefully tested
for proper operation and veried to be in full compliance with the factory
manufacturing documents. Customer furnished components such as
control valves, switches and DDC controls are not factory tested.
Each unit is carefully packaged for shipment to avoid damage during
normal transport and handling. The equipment should always be stored in
a dry place in the proper orientation as marked on the carton.
All shipments are made F.O.B. factory and it is the responsibility of
the receiving party to inspect the equipment upon arrival. Any obvious
damage to the carton and/or its contents should be recorded on the bill of
lading and a claim should be led with the freight carrier.
After determining the condition of the carton exterior,carefully remove each
unit from the carton and inspect for hidden damage. At this time check
to make sure that “furnished only” items such as switches, thermostats,
etc. are accounted for. Any hidden damage should be recorded and
immediately reported to the carrier and a claim led as before.
In the event a claim for shipping damage is led, the unit, shipping carton,
and all packing must be retained for physical inspection by the freight
carrier. All equipment should be stored in the factory shipping carton with
internal packing in place until installation.
At the time of receipt, the equipment type and arrangement should be
veried against the order documents. Should any discrepancy be found,
the local Sales Representative should be notied immediately so that the
proper action may be instituted. Should any question arise concerning
warranty repairs, the factory must be notied BEFORE any corrective
action is taken. Where local repairs or alterations can be accomplished, the
factory must be fully informed as to the extent and expected cost of those
repairs before work is begun. Where factory operations are required,the
factory must be contacted for authorization to return equipment and
a Return Authorization Number will be issued. Unauthorized return
shipments of equipment and shipments not marked with an authorization
number will be refused. In addition, the manufacturer will not accept any
claims for unauthorized expenses.
HANDLING & INSTALLATION
While all equipment is designed for durability and fabricated for sturdy
construction and may present a rugged appearance, great care must be
taken to assure that no force or pressure be applied to the coil, piping
or drain stub-outs during handling. Also, depending on the options and
accessories, some units could contain delicate components that may be
damaged by improper handling. Wherever possible, all units should be
maintained in an upright position and handled by the chassis as close as
possible to the mounting point locations.
In the case of a full cabinet unit, the unit must obviously be handled by the
exterior casing. This is acceptable providing the unit is again maintained
in an upright position and no impact forces are applied that may damage
internal components, access panels, or painted surfaces. The equipment
covered in this manual IS NOT suitable for outdoor installations. The
equipment should never be stored or installed where it may be subjected
to a hostile environment such as rain, snow, or extreme temperatures.

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During and after installation, special care must be taken to prevent foreign
material such as paint, plaster, and drywall dust from being deposited
in the drain pan or on the motor or blower wheels. Failure to do so may
have serious adverse effects on unit operation and in the case of the
motor and blower assembly, may result in immediate or premature failure.
All manufacturers’ warranties are void if foreign material is allowed to be
deposited on the motor or blower wheels of any unit. Some units and/
or job conditions may require some form of temporary covering during
construction.
While the manufacturer does not become involved in the design and
selection of support methods and components, it should be noted that
unacceptable system operating characteristics and/or performance
might result from improper or inadequate unit structural support.
In addition, adequate clearance must be provided for service and
removal of the equipment and its accessory components. Anchoring
the equipment in place is accomplished by using the mounting points
provided and positioning the unit to maintain the unit on a LEVEL plane.
The drain pan is internally sloped toward the outlet connection. Care
must be taken to insure that the unit drain pan does not slope away from
the outlet connection. All units are supplied with hanger brackets with
rubber grommet isolators and brass inserts for use with 3/8” all thread
hanger rod.
warning
The unit’s drain pan is factory sloped toward the drain
connection when the unit is installed level and plumb.
Drain Pan
Standard drain pans are externally insulated, single wall galvanized steel
and can be equipped with a secondary drain connection. The RBH drain
pan is easily removable for cleaning or reversing connections. Auxiliary
drip pan to catch condensed moisture from valves and piping must be
sloped toward the drain pan.
Coils
All fan coils are available in 2 or 4 pipe congurations. Heating coils are
available in reheat or preheat position. Heating and cooling coils are
available with right, left or opposite side connections.
Verify that the proper types of service are actually provided to the unit.
On units with steam heating coils, the maximum steam pressure applied
to the unit should never exceed 15 PSIG. The drain piping and steam
trap should be sized and routed to allow for proper condensate ow. The
electrical service to the unit should be compared to the unit nameplate
to verify compatibility. The routing and sizing of all piping, and the type
and sizing of all wiring and other electrical components such as circuit
breakers, disconnect switches, etc. should be determined by the individual
job requirements and should not be based on the size and/or type of
connection provided on the equipment. All installations should be made in
compliance with all governing codes and ordinances. Compliance with all
codes is the responsibility of the installing contractor.

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NOTES:
1. All dimensions in inches [millimeters]. All dimensions ± 1/4" [6mm]. Metric values are
soft conversion.
2. Left hand unit shown, right hand unit opposite
3. Standard control enclosure is mounted on unit side opposite cooling coil connections.
Unit casing includes (2) knock outs on each side. Provide sufcient clearance to access
electrical controls and comply with applicable codes and ordinances.
4. Optional bottom control enclosure with hinged cover replaces standard side mounted
enclosure and includes (2) additional knockouts on bottom of unit on left side
5. Standard externally foam coated galvanized steel drain pan has 7/8” ODM copper
outlet. Stainless steel drain pan has 3/4” MPT galvanized steel outlet.
6. Auxiliary drain outlet is 5/8” ODM copper or 3/8” MPT galvanized steel respectively
7. See coil connection drawings for coil connection sizes and locations
RBHO Horizontal Low Profile Concealed Free Return
UNIT SIZE A C D E
20 20
[508]
21
[533]
22
[559]
30
[762]
25 26
[660]
27
[686]
28
[711]
36
[914]
30 30
[762]
31
[787]
32
[813]
40
[1016]
40 40
[1016]
41
[1041]
42
[1067]
50
[1270]
50 50
[1270]
51
[1395]
52
[1321]
60
[1524]
60 60
[1524]
61
[1549]
62
[1575]
70
[1778]

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RBHR Horizontal Low Profile with Plenum Return
Notes:
1. All dimensions are Inches [millimeters]. All dimensions ± ¼” [6mm].
Metric values are soft conversion.
2. Left hand unit shown, right hand unit opposite
3. Standard control enclosure is mounted on unit side opposite cooling coil connections.
Unit casting includes (2) knockouts on each side. Provide sufcient clearance to access
electrical controls and comply with applicable codes and ordinances.
4. Optional bottom control enclosure with hinged cover replaces standard side mounted
enclosure and includes (2) additional knockouts on bottom of unit,
on left side.
5. Standard externally foam coated galvanized steel drain pan has 7/8” ODM copper
outlet. Stainless steel drain pan has ¾” MPT galvanized steel outlet.
6. Aux. drain outlet is 5/8” ODM copper or 3/8” MPT galvanized steel respectively
7. See coil connection drawings for coil connection sizes and locations
Unit
Size A C D E F
20 20 [508] 21 [533] 22 [559} 19 [483] 30 [762]
25 26 [660] 27 [686] 28 [711] 25 [635] 36 [914]
30 30 [762] 31 [787] 82 [813] 29 [737] 40 [1016]
40 40 [1016] 41 [1041] 42 [1067] 39 [991] 50 [1270]
50 50 [1270] 51 [1295] 52 [1321] 49 [1245] 60 [1524]
60 60 [1524] 61 [1549] 62 [1575] 59 [1499] 70 [1778]

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Notes:
1. All dimensions are Inches [millimeters]. All dimensions ± ¼” [6mm]. Metric values are
soft conversion.
2. Left hand unit shown, right hand unit opposite.
3. Electrical enclosure size and location may vary with optional features. Provide
sufcient clearance to access electrical controls and comply with applicable codes and
ordinances.
4. Drain piping should be routed though casting opening indicated to provide proper drain
slope.
5. Small bottom panel is hinged and removable for access to lter and fan assembly.
6. Fixed bottom panel is removable for access to optional electrical enclosure, coil, and
drain pan.
7. Internal insulation of eld piping may be required.
8. Field piping casting penetrations must be cut in the eld to match individual job
requirements.
RBHC Horizontal Low Profile Exposed Cabinet
UNIT SIZE A B C D E F
20 40
[1016]
19 ½
[495]
6 ¼
[159]
19
[483]
30
[762]
6 ¼
[159]
25 46
[1168]
23 ½
[597]
6 ¼
[159]]
25
[635]
36
[914]
6 ¼
[159]]
30 50
[1270]
27 ½
[699]
7 ¼
[184]
29
[737]
40
[1016]
5 ¼
[133]
40 60
[1524]
39 ½
[1003]
6 ¼
[159]
39
[991]
50
[1270]
6 ¼
[159]]
50 70
[1778]
47 ½
[1207]
7 ¼
[184]
49
[1245]
60
[1524]
5 ¼
[133]
60 80
[2032]
59 ½
[1511]
6 ¼
[159]
59
[1499]
70
[1778]
6 ¼
[159]]

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caution
Toxic residues and loose particles resulting from manufacturing and eld piping techniques such as joint compounds, soldering ux, and
metal shavings may be present in the unit and the piping system. Special consideration must be given to system cleanliness when
connecting) to solar, domestic or potable water systems.
Model/Size Coil Airow CFM
(Dry Flow)
Cooling Capacity Water Power Input
(Watts)
Rows FPI QT (BTUH) QS (BTUH) Flow Rate (GPM) WPD (ft-wg)
RBHO-20 3 10 331 9699 7210 1.9 5.26 57
RBHO-25 3 10 448 14189 10210 2.8 10.66 125
RBHO-30 3 10 771 18750 14640 3.8 6.5 165
RBHO-40 3 10 793 22559 16719 4.5 10.22 261
RBHO-50 3 10 1196 30370 23280 6 9.17 472
RBHO-60 3 10 1440 34169 27000 6.8 4.5 522
RBHO-20 4 10 312 12680 8760 2.5 10.22 57
RBHO-25 4 10 434 15869 11340 3.1 5.79 125
RBHO-30 4 10 721 23790 17469 4.8 11.51 165
RBHO-40 4 10 779 28399 20280 5.7 9.34 261
RBHO-50 4 10 1166 37490 27790 7.5 9.23 472
RBHO-60 4 10 1365 42849 32400 8.5 4.12 522
RBHR-20 3 10 265 8220 6039 1.6 4.05 57
RBHR-25 3 10 414 13430 9609 2.7 10.02 125
RBHR-30 3 10 620 16309 12500 3.3 5.19 165
RBHR-40 3 10 768 22069 16309 4.4 9.63 261
RBHR-50 3 10 1069 28579 21600 5.7 8.34 472
RBHR-60 3 10 1324 32639 25530 6.5 4.2 522
RBHR-20 4 10 253 10819 7369 2.2 8.42 57
RBHR-25 4 10 404 15100 10729 3 5.43 125
RBHR-30 4 10 604 21280 15310 4.3 9.52 165
RBHR-40 4 10 743 27530 19559 5.5 9.01 261
RBHR-50 4 10 1022 34490 25190 6.9 8.06 472
RBHR-60 4 10 1258 40409 30350 8 3.68 522
RBHC-20 3 10 265 8220 6039 1.6 4.05 57
RBHC-25 3 10 414 13430 9609 2.7 10.02 125
RBHC-30 3 10 620 16309 12500 3.3 5.19 165
RBHC-40 3 10 768 22069 16309 4.4 9.63 261
RBHC-50 3 10 1069 28579 21600 5.7 8.34 472
RBHC-60 3 10 1324 32639 25530 6.5 4.2 522
RBHC-20 4 10 253 10819 7369 2.2 8.42 57
RBHC-25 4 10 404 15100 10729 3 5.43 125
RBHC-30 4 10 604 21280 15310 4.3 9.52 165
RBHC-40 4 10 743 27530 19559 5.5 9.01 261
RBHC-50 4 10 1022 34490 25190 6.9 8.06 472
RBHC-60 4 10 1258 40409 30350 8 3.68 522
Note: Based on 80°F DB and 67°F WB EAT, 45°F EWT, 10°F temperature rise, high fan speed. Motor type is PSC and motor voltage is 115/1/60.
Airow under dry coil conditions. Models RBHC tested at 0.0" external static pressure. Models RBHO and RBHR tested at 0.05" external static pressure.
AHRI Standard Ratings