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

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Submittals and Product Catalogs detailing unit operation, controls, and
connections should be thoroughly reviewed BEFORE beginning the
connection of the various cooling and/or heating mediums to the unit.
All accessory valve packages should be installed as required, and all
service valves should be checked for proper operation.
If coil and valve package connections are to be made with “sweat” or
solder joint, care should be taken to assure that no components in the
valve package are subjected to a high temperature which may damage
seals or other materials. Many two-position electric control valves,
depending on valve operation, are provided with a manual-opening lever.
This lever should be placed in the “open” position during all soldering or
brazing operations. Valve bodies should be wrapped with a wet rag to
help dissipate heat encountered during brazing.
If the valve package connection at the coil is made with a union, the coil
side of the union must be prevented from twisting (“backed up”) during
tightening to prevent damage to the coil tubing. Over-tightening must be
avoided to prevent distorting the union seal surface and destroying the
union. In the case of eld installed valves and piping, the chilled water
valve cluster (or expansion valve on DX units) should be installed in such
a way that any dripping or sweating is contained in the auxiliary drain pan
or other device. Valves and TXV’s should be secured or supported to
avoid damage to coil headers or distributor tubes.
AUXILIARY DRAIN PANS
Mounted directly to the unit drain pan, AUXILIARY DRAIN PANS may
also be secured by the mounting holes to eld supports or to the unit coil
utilizing pipe hanger wire, plastic ties, or metal strapping.
After the connections are completed, the system should then be tested for
leaks. Since some components are not designed to hold pressure with a
gas, hydronic systems should be tested with water.
Unit Type Unit Size Nom CFM
1 Row 2 Row
QS (MBH) GPM WPD QS (MBH) GPM WPD
RBHO
20 330 12.1 0.6 1.06 20.9 1.1 0.81
25 447 16.5 0.8 2.27 28.6 1.5 1.76
30 805 23.0 1.2 4.5 41.9 2.2 3.79
40 793 24.8 1.3 0.9 47.2 2.4 5.74
50 1273 35.2 1.8 2.03 64.4 3.3 1.73
60 1563 44.0 2.3 3.61 80.4 4.1 3.1
RBHR
20 264 10.8 0.6 0.85 18.1 0.9 0.62
25 414 15.9 0.8 2.11 27.3 1.4 1.6
30 619 20.4 1.0 3.58 36.2 1.9 2.88
40 767 24.4 1.3 0.88 46.3 2.4 5.56
50 1141 33.6 1.7 1.85 60.7 3.1 1.55
60 1433 42.3 2.2 3.37 76.6 3.9 2.81
RBHC
20 286 11.3 0.6 0.92 19.1 1.0 0.69
25 431 16.2 0.8 2.22 27.9 1.4 1.67
30 667 21.1 1.1 3.85 37.8 1.9 3.13
40 795 24.9 1.3 0.9 47.3 2.4 5.74
50 1190 34.2 1.8 1.92 19.1 1.0 0.69
60 1489 43.1 2.2 3.49 78.3 4.0 2.93
Note: Based on 70°F DB EAT, 180°F EWT, 40°F temperature drop, high fan speed
Heating Capacity
caution
All water coils must be protected from freezing after initial
lling with water. Even if the system is drained, unit coils
may still hold enough water to cause damage when
exposed to temperatures below freezing.
Refrigerant systems should be tested with dry nitrogen rather than air
to prevent the introduction of moisture into the system. In the event that
leaking or defective components are discovered, the Sales Representative
must be notied BEFORE any repairs are attempted. All leaks should be
repaired before proceeding with the installation.

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CONDENSATE TRAP DUCTWORK CONNECTIONS
All ductwork and/or supply and return grilles should be installed in
accordance with the project plans and specications. If not included on
the unit or furnished from the factory, Superior Rex supply and return
grilles are available in a variety of types.
All units must be installed in non-combustible areas.
Some models are designed to be connected to duct-work with a MINIMUM
amount of external static pressure. Consult the approved submittals and
the product catalog for unit external static pressure limitations.
Units provided with outside air for ventilation should have some form of
low temperature protection to prevent coil freeze-up.
It should be noted that none of these methods would adequately protect
a coil in the event of power failure. The safest method of freeze protection
is to use glycol in the proper percent solution for the coldest expected air
temperature.
The manufacturer assumes no responsibility for undesirable system
operation due to improper design, equipment or component selection, and/
or installation of ductwork, grilles, and other eld supplied components.
ELECTRICAL CONNECTIONS
The unit nameplate lists the unit electrical characteristics such as the
required supply voltage, fan and heater amperage and required circuit
ampacities. The unit wiring diagram shows all unit and eld wiring. Since
each project is different and each unit on a project maybe different, the
installer must be familiar with the wiring diagram and nameplate on
the unit BEFORE beginning any wiring. This unit is not acceptable for
installation in hazardous/explosive areas.
After system integrity has been established the piping should be insulated
in accordance with the project specications. ALL chilled water piping and
valves or refrigerant suction piping not located over drain pans must be
insulated to prevent damage from sweating. This includes factory and
eld piping inside the unit cabinet.
The drain should always be connected and piped to an acceptable disposal
point. For proper moisture carry-off, the drain piping should be sloped
away from the unit at least 1/8” per foot. A drain trap may be required by
local codes and it is strongly recommended for odor containment.

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ELECTRICAL ENCLOSURE
The optional bottom hinged electrical enclosure provides access to a
spacious electrical compartment. This compartment houses all electric
heat and control components. Terminal strips are furnished for simple
power and control wiring connections.
All components furnished for eld installation, by either the factory or the
controls contractor should be located and checked for proper function
and compatibility. All internal components should be checked for shipping
damage and all electrical connections should be tightened to minimize
problems during start-up.
Any devices such as fan switches or thermostats that have been furnished
from the factory for eld installation must be wired in strict accordance
with the applicable wiring diagrams. Failure to do so could result in
personal injury or damage to components and will void all manufacturers’
warranties.
The fan motor(s) should never be controlled by any wiring or device
other than the factory furnished switch or thermostat/switch combination,
without factory authorization.
All eld wiring should be done in accordance with governing codes
and ordinances. Any modication of the unit wiring without factory
authorization will result in voiding of all factory warranties and will nullify
any agency listings. The manufacturer assumes no responsibility for any
damages and/or injuries resulting from improperly eld installed or wired
components.
TELESCOPING BOTTOM PANEL
The telescoping bottom panel allows for fully recessing the unit while
permitting service access into the ceiling plenum. The architectural ceiling
panel is nished with a durable powder coat paint.
note
Portions of the inlet louver not directly below unit inlet may
require covering in the eld on applications where inltration
of ceiling plenum air into space is undesired. Telescoping
skirt and collar assembly must be eld adjusted to assure a
proper t between lter frame and louvered inlet panel
assembly. Refer to assembly submittal drawings for specic
dimensions.

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MODEL RBHR HORIZONTAL FAN COIL
Optional Telescoping Bottom Panel Assembly, Typical Installation Instructions
Notes:
1. All dimensions are Inches [millimeters]. All dimensions ± ¼” [6mm]. Metric values are
soft conversion.
2. All drawing subject to change without prior notice.
3. Left hand unit shown, right hand unit opposite.
4. Mounting hardware not provided. Mounting holes must be located and drilled to suit
individual job requirements.
5. Remove solid louvered bottom panels before mounting frame assembly.
6. Frame assembly must be installed at and square. Failure to do so may result in poor
bottom panel t and improper airow pattern. Shim frame to support as required.
7. Telescoping skirt assembly must be eld adjusted to assure close t of lter rack to
louvered bottom panel.
8. Attach standard lter rack assembly to bottom of telescoping skirt, after nal adjustment
of skirt location. Filter removal direction is optional.
9. Portion of the inlet louver not directly below unit inlet may require covering in the eld
on applications where inltration of ceiling plenum air into space is undesired.

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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. Portion of the inlet louver not directly below unit inlet may require covering in the eld
on applications where inltration of ceiling plenum air into space is undesired.
4. Telescoping skirt and collar assembly must be eld adjusted to assure a proper t
between lter frame and louvered inlet panel assembly.
5. ¼ Turn latch, (2) qty for standard sizes, (3) qty for sizes 40-60.
MODEL RBHR HORIZONTAL FAN COIL
Optional Telescoping Bottom Panel Assembly
UNIT SIZE STANDARD PANEL
A B C D E
20 38 1/8
[968]
40
[1016]
14 1/2
[368]
4 1/4
[108]
27 1/2
[699]
25 44 1/8
[1121]
46
[1168]
17 1/2
[445]
3 1/4
[83]
35 1/2
[902]
30 48 1/8
[1222]
50
[1270]
19 1/2
[368]
3 1/4
[83]
39 1/2
[1003]
40 58 1/8
[1476]
60
[1524]
24 1/2
[622]
4 1/4
[108]
47
[1207]
50 68 1/8
[1730]
70
[1778]
29 1/2
[749]
3 1/4
[83]
59
[1511]
60 78 1/8
[1984]
80
[2032]
34 1/2
[876]
4 1/4
[108]
67 1/2
[1715]

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SECTION 2 - START-UP
GENERAL
Before beginning any start-up operation, the start-up personnel should
familiarize themselves with the unit, options and accessories, and control
sequence to understand the proper system operation.All personnel should
have a good working knowledge of general start-up procedures and have
the appropriate start-up and balancing guides available for consultation.
The initial step in any startup operation should be a nal visual inspection.
All equipment, plenums, duct-work, and piping should be inspected to
verify that all systems are complete and properly installed and mounted,
and that no debris or foreign articles such as paper or drink cans are left in
the units or other areas. Each unit should be checked for loose wires, free
blower wheel operation, and loose or missing access panels or doors.
Except as required during start-up and balancing operations, no fan coil
units should be operated without all the proper ductwork attached, supply
and return grilles in place, and all access doors and panels in place and
secure. A clean lter of the proper size and type must also be installed.
Failure to do so could result in damage to the equipment or building and
furnishings, and/or void all manufacturers’ warranties.
COOLING/HEATING SYSTEM
Prior to the water system start-up and balancing, the chilled/hot water
systems should be ushed to clean out dirt and debris, which may have
collected in the piping during construction. During this procedure,all unit
service valves must be in the closed position. This prevents foreign matter
from entering the unit and clogging the valves and metering devices.
Strainers should be installed in the piping mains to prevent this material
from entering the units during normal operation.
During system lling, air venting from the unit is accomplished by the use
of the standard manual, or optional automatic, air vent tting installed
on the coil. In the case of the manual air vent tting, the screw should
be turned counterclockwise no more than 1-½ turns to operate the air
vent. Automatic air vents may be unscrewed one turn counterclockwise to
speed initial venting but should be screwed in for automatic venting after
start-up operations
caution
The air vent provided on the unit is not intended to replace
the main system air vents and may not release air trapped
in other parts of the system. Inspect the entire system for
potential air traps and vent those areas independently as
required. In addition, some systems may require repeated
venting over a period of time to properly eliminate air from
the system.
AIR SYSTEM BALANCING
All ductwork must be complete and connected,and all grilles, lters, and
access doors and panels must be properly installed to establish actual
system operating conditions BEFORE beginning air balancing operations.
Each individual unit and associated ductwork is a unique system with its
own operating characteristics. For this reason, air balancing is normally
done by balance specialists who are familiar with all procedures required
to properly establish air distribution and fan system operating conditions.
These procedures should not be attempted by unqualied personnel.
Units without ductwork do not require air balancing other than selecting
the desired fan speed.
After the proper system operation is established,the actual unit air
delivery and the actual fan motor amperage draw for each unit should be
recorded in a convenient place for future reference such as the inspection,
installation, and start-up check sheet (see Section 4). Contact the Sales
Representative or the factory for additional copies of this sheet.

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WATER SYSTEM BALANCING
A complete knowledge of the hydronic system, its components, and
controls is essential to proper water system balancing and this procedure
should not be attempted by unqualied personnel. The system must be
complete and all components must be in operating condition BEFORE
beginning water system balancing operations.
Each hydronic system has different operating characteristics depending
on the devices and controls in the system. The actual balancing technique
may vary from one system to another.
After the proper system operation is established, the appropriate system
operating conditions such as various water temperatures and ow rates
should be recorded in a convenient place for future reference such as the
inspection, installation, and start-up check sheet (see Section 4). Contact
the Sales Representative or the factory for additional copies of this sheet.
Before and during water system balancing, conditions may exist which
can result in noticeable water noise or undesired valve operation due to
incorrect system pressures. After the entire system is balanced, these
conditions will not exist on properly designed systems.
CONTROLS OPERATION
Before proper control operation can be veried all other systems must
be in proper operation. The correct water and air temperatures must be
present for the control function being tested. Some controls and features
are designed not to operate under certain conditions.
A wide range of controls and electrical options and accessories may be
used with the equipment covered in this manual. Consult the approved
unit submittals, order acknowledgment, and other manuals for detailed
information regarding each individual unit and its controls. Since controls
and features may vary from one unit to another, care should be taken
to identify the controls to be used on each unit and their proper control
sequence. Information provided by component manufacturers regarding
installation, operation, and maintenance of their individual controls is
available upon request.
UNIT
SIZE
FAN
SPEED
MOTOR
H.P.
(QTY.)
# OF
FANS
115 VOLTS 208/230 VOLTS 277 VOLTS
AMPS WATTS AMPS WATTS AMPS WATTS
20
High (1) 1/30
1
0.8 57 0.6 77 0.3 71
Medium (1) 1/50 0.4 39 0.3 49 0.3 48
Low (1) 1/60 0.3 33 0.3 43 0.3 41
25
High (1) 1/15
1
1.0 125 0.5 120 0.5 120
Medium (1) 1/30 0.9 90 0.3 80 0.3 80
Low (1) 1/60 0.5 60 0.2 60 0.2 60
30
High (1) 1/10
2
1.9 165 0.8 158 0.8 162
Medium (1) 1/30 0.8 76 0.3 75 0.5 65
Low (1) 1/60 0.5 47 0.2 54 0.4 41
40
High (1) 1/6
2
2.5 261 1.4 284 10. 254
Medium (1) 1/12 1.5 162 0.5 171 0.5 152
Low (1) 1/40 0.6 75 0.4 79 0.3 74
50
High (1) 1/8
3
1.6 215 0.9 216 0.8 214
(1) 1/6 2.5 257 1.4 233 1.0 255
Medium (1) 1/15 1.3 145 0.6 109 0.5 132
(1) 1/12 1.5 156 0.5 106 0.5 151
Low (1) 1/40 0.8 69 0.3 63 0.3 86
(1) 1/40 0.6 75 0.4 62 0.3 84
60
High (2) 1/6
4
5.0 522 2.8 568 2.0 508
Medium (2) 1/12 3.0 324 1.0 342 1.0 304
Low (2) 1/40 1.2 150 0.6 158 0.6 148
MOTOR AND FAN DATA
NOTES:
1. Motor electrical data is nameplate data. Actual data will vary with application.
2. 230 volt motor is nameplated for 208/230/1/60. Use 230 volt motor data for 208 volt applications.
3. Unit size 30, 208/230 and 277 volt motors are 1/12 HP at high tap

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SECTION 3 - NORMAL OPERATION & PERIODIC MAINTENANCE
GENERAL
Each unit on a job will have its own unique operating environment and
conditions that may dictate maintenance schedule for that unit that is
different form other equipment on the job. A formal schedule of regular
maintenance and an individual unit log should be established and
maintained. This will help to achieve the maximum performance and
service life of each unit on the job.
warning
Information regarding safety precautions contained in the
preface at the beginning of this manual should be followed
during any service and maintenance operations.
For more detailed information concerning service operations, consult your
Sales Representative.
MOTOR /BLOWER ASSEMBLY
The type of fan operation is determined by the control components and
their method of wiring, and may vary from unit to unit. Refer to the wiring
diagram for each unit for that unit’s individual operating characteristics. All
motors have internal automatic reset thermal overloads.
Dirt and dust should not be allowed to accumulate on the blower wheel
or housing. This can result in an unbalanced blower wheel condition that
can damage a blower wheel or motor. The wheel and housing may be
cleaned periodically using a vacuum cleaner and a brush taking care not to
dislodge the factory balancing weights on the blower wheel blades.
COIL
Coils may be cleaned by brushing the entering air face between ns with a
soft brush. Brushing should be followed by cleaning with a vacuum cleaner.
If a compressed air source is available, the coil may also be cleaned by
blowing air through the coil ns from the leaving air face. Vacuuming
should again follow this procedure. Units provided with the proper type of
air lters, replaced regularly, will still require periodic coil cleaning.
ELECTRIC RESISTANCE HEATER ASSEMBLY
Electric resistance heaters typically require no normal periodic
maintenance when unit air lters are changed properly. The two most
important operating conditions for an electric heater are proper airow
and proper supply voltage. High supply voltage and/ or poorly distributed
or insufcient airow over the element will result in element overheating.
This condition may result in the heater cycling on the high limit thermal
cutout. Open coil strip heaters have an automatic reset switch with a back-
up high limit thermal switch. Automatic reset switches are as the name
implies; they reset automatically after the heater has cooled sufciently.
High limit thermal switches must be replaced once the circuit has been
broken. The high limit thermal cutout device is a safety device only and
is not intended for continuous operation. With proper unit application and
operation, the high limit thermal cutout will not deactivate the heater. This
device only operates when some problem exists and ANY condition that
causes high limit cutout MUST be corrected immediately. High supply
voltage also causes excessive amperage draw and may result in tripping
of the circuit breaker or blowing of the fuses on the incoming power supply.
Fan Deck
The fan assembly is easily removed from the unit without disconnecting
the ductwork for service access to motors and blowers at, or away from
the unit.
Should the assembly require more extensive service, the motor/blower
assembly may be removed from the unit to facilitate such operations as
motor or blower wheel/housing replacement, etc.

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ELECTRICAL WIRING & CONTROLS
The electrical operation of each unit is determined by the components and
wiring of the unit and may vary from unit to unit. Consult the wiring diagram
for the actual type and number of controls provided on each unit. The
integrity of all electrical connections should be veried at least twice during
the rst year of operation. Afterwards, all controls should be inspected
regularly for proper operation. Some components may experience erratic
operation or failure due to age. Wall thermostats may also become clogged
with dust and lint and should be periodically inspected and cleaned to
provide reliable operation.
When replacing any components such as fuses, contactors, or relays, use
only the exact type, size, and voltage component as furnished from the
factory. Any deviation without factory authorization could result in personnel
injury or damage to the unit and will void all factory warranties. All repair
work should be done in such a manner as to maintain the equipment in
compliance with governing codes and ordinances or testing agency listings.
More specic information regarding the use and operating characteristics
of the standard controls offered by this manufacturer is contained in other
manuals.
VALVES & PIPING
No formal maintenance is required on the valve package components
most commonly used with fan coil units other than a visual inspection for
possible leaks in the course of other normal periodic maintenance. In the
event that a valve should need replacement, the same precautions taken
during the initial installation to protect the valve package from excessive
heat should also be used during replacement. In some cases, the valve
actuator may fail and usually can be replaced without removing valve
body from piping.
FILTERS , THROWAWAY
The type of throwaway lter most commonly used on fan coil units
should be replaced on a regular basis. The time interval between each
replacement should be established based on regular inspection of the
lter and should be recorded in the log for each unit. Refer to the chart
below for recommended lter size for each product type and size. If the
replacement lters are not purchased from the factory, the lters used
should be the same type and size as that furnished from or recommended
by the factory. Pleated media or extended surface lters should not be
used since the high air pressure drops encountered with these types
of lters is not compatible with the type of fan coil unit covered in this
manual. Consult the factory for applications using lter types other than
the factory standard or optional product.
Face Area, Free Area and Filter Sizes
NOTES:
1. Face and free areas are in square feet [square meters].
2. Filter sizes are in inches [millimeters].
3. Free area of Superior Rex Model RBHC and Telescoping Bottom Panel return grilles.
4. Free area of Superior Rex Model RBHC supply grille and minimum free area allowable
for a supply grille supplied by others
Unit
Size
Coil Face
Area
Model RBHC Model RBHR
Return Air
Grille Free
Area
Supply Air
Grille Free
Area
Filter Face
Area Nominal Filter Sizes Filter Face Area Nominal Filter Sizes
20 1.11 [0.1] 0.47 [.04] 0.40 [.04] 1.77 [.16] 30 X 8.5 X 1
[762 X 216 X 25]
1.18
[.11]
20 X 8.5 X 1
[508 X 216 X 25]
25 1.44 [0.13] 0.58 [.05] 0.50 [.05] 2.36 [.22] (2) 20 X 8.5 X 1
[508 X 216 X 25]
1.54
[.14]
26 X 8.5 X 1
[660 X 216 X 25]
30 1.67 [0.15] 0.68 [.06] 0.56 [.05] 2.36 [.22] (2) 20 X 8.5 X 1
[508 X 216 X 25]
1.77
[.11]
30 X 8.5 X 1
[762 X 216 X 25]
40 2.22 [0.21] 0.81 [.08] 0.80 [.07] 2.95 [.27] (1) 20, (1) 30 X 8.5 X 1
[508, 762 X 216 X 25]
2.36
[.22]
(2) 20 X 8.5 X 1
[508 X 216 X 25]
50 2.78 [0.26] 1.01 [.09] 0.96 [.09] 3.54 [.33] (2) 30 X 8.5 X 1
[762 X 216 X 25]
2.95
[.27]
(1) 20, (1) 30 X 8.5 X 1
[508, 762 X 216 X 25]
60 3.33 [0.31] 1.15 [.11] 1.20 [.11] 4.13 [.38] (2) 20, (1) 30 X 8.5 X 1
[508, 762 X 216 X 25]
3.54
[.33]
(2) 30 X 8.5 X 1
[762 X 216 X 25]

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DRAIN
The drain should be checked before initial start-up and at the beginning
of each cooling season to assure that the drain trap and line are clear. If it
is clogged, steps should be taken to clear the debris so that condensate
will ow easily.
Periodic checks of the drain should be made during the cooling season
to maintain a free owing condensate. Should the growth of algae and/or
bacteria be a concern, consult an air conditioning and refrigeration supply
organization familiar with local conditions for chemicals available to
control these agents. The drain trap is a exible rubber hose. It is secured
to the drain pan and riser with clamps and is easily removable for service.
REPLACEMENT PARTS
Factory replacement parts should be used wherever possible to maintain
the unit performance and operating characteristics and the testing agency
listings. Replacement parts may be purchased through the local Sales
Representative.
Contact the local Sales Representative before attempting any unit
modications. Any modications not authorized by the factory could result
in personnel injury and damage to the unit and could void all factory
warranties. When ordering parts, the following information must be
supplied to ensure proper part identication:
1. Complete unit model number
2. Unit hand connection (right or left hand) while facing the direction of
airow at the inlet
3. Complete part description including any numbers.
On warranty replacements, in addition to the information previously listed,
the project CO # that appears on the unit nameplate, is required. Contact
the factory for authorization to return any parts such as defective parts
replaced in warranty. All shipments returned to the factory MUST be
marked with a Return Authorization Number, which is provided by the
factory.
All equipment and components sold through the Parts Department are
warranted under the same conditions as the standard manufacturer’s
warranty with the exception that the warranty period is 12 months unless
the component is furnished as warranty replacement. Parts furnished
as warranty replacements are warranted for the remaining term of the
original unit warranties.
COMPONENT UNIT SIZE
20 25 30 40 50 60
RBHO BASE UNIT 40 [18] 51 [23] 59 [27] 69 [31] 91 [41] 111 [50]
RBHR BASE UNIT 45 [20] 56 [25] 65 [30] 80 [36] 103 [47] 123 [56]
RBHC BASE UNIT 119 [54] 138 [63] 155 [70] 181 [82] 220 [100] 257 [117]
COIL
ROWS
1 ROW - DRY 8 [4] 10 [5] 11 [5] 13 [6] 15 [7] 18 [8]
1 ROW - WET 10 [5] 12 [5] 13 [6] 15 [7] 18 [8] 21 [10]
2 ROW - DRY 11 [5] 13 [6] 15 [7] 18 [8] 22 [10] 26 [12]
2 ROW - WET 14 [6] 16 [7] 18 [8] 22 [10] 27 [12] 32 [15]
3 ROW - DRY 14 [6] 17 [8] 19 [9] 24 [11] 29 [13] 34 [15]
3 ROW - WET 17 [8] 21 [10] 24 [11] 30 [14] 36 [16] 42 [19]
4 ROW - DRY 17 [8] 20 [9] 23 [10] 29 [13] 36 [16] 42 [19]
4 ROW - WET 21 [10] 25 [11] 29 [13] 36 [16][ 45 [20] 53 [24]
UNIT WEIGHT DATA (lbs.)
NOTE: Unit weight data is in pounds [kilograms].