TempMaster OmniElite TMAL 050-061 User manual

LD19892
FORM TPM1-EG1 (516)
TempMaster®OmniElite™
SINGLE PACKAGE ROOFTOP UNITS
ENGINEERING GUIDE
50–65 Tons
Cooling and Heating (Gas, Electric, Water, and Steam)
R-410A
Mod F

TEMPMASTER
FORM TPM1-EG1 (516)
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BASE MODEL NUMBER TMAL 050-061
V : VAV, VFD
C : Cooling Only
N : Staged Natural Gas Heat
G : Staged Natural Gas Heat SS HX
M : Full Modulating Gas Heat
F : Full Modulating Gas Heat SS Staged HX
E : Electric Heat
H : Hot Water Heat
S : Steam Heat
55 Ton Capacity
50 Ton Capacity
60 Ton Capacity
65 Ton Capacity
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
BASE PRODUCT TYPE NOMINAL APPLICATION REFRIGERANT VOLTAGE SUPPLY RETURN DESIGN SPECIAL GAS HEAT
X: Std. Product, IPU
S: Special Product, IPU
E : R-410A
5 : 208/3/60
230/3/60
6 : 460/3/60
8 : 575/3/60
B: Bottom
R: Rear
S: Side
L : Scroll
M : Packaged Rooftop
A : Air-Cooled
T : TempMaster
0
1
0
1
5
5
6
6
0
0
0
0
2
4
5
B: Bottom
L: Left
R: Right
F : Revision Level
N : None
L : Low
M : Medium
H : High
CAPACITY OPENINGS OPENINGS CAPACITY
Nomenclature

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Table of Contents
INTRODUCTION...................................................................................................................................................... 5
FEATURES AND BENEFITS................................................................................................................................... 7
APPLICATION DATA ............................................................................................................................................. 15
PHYSICAL DATA................................................................................................................................................... 21
ALTITUDE AND TEMPERATURE CORRECTIONS.............................................................................................. 25
COOLING PERFORMANCE DATA — 050 MODEL.............................................................................................. 27
COOLING PERFORMANCE DATA — 051 MODEL.............................................................................................. 28
COOLING PERFORMANCE DATA — 060 MODEL.............................................................................................. 29
COOLING PERFORMANCE DATA — 061 MODEL.............................................................................................. 30
HEATING PERFORMANCE DATA — GAS/ELECTRIC HEAT/HOT WATER COIL/ STEAM COIL ..................... 31
COMPONENT STATIC PRESSURE DROPS ........................................................................................................ 32
SUPPLY FAN DATA............................................................................................................................................... 34
RETURN FAN DATA.............................................................................................................................................. 36
ELECTRICAL DATA .............................................................................................................................................. 37
CONTROLS ........................................................................................................................................................... 39
SPECIAL DESIGN OPTIONS ................................................................................................................................ 52
GENERAL ARRANGEMENT DRAWINGS ............................................................................................................ 53
UNIT WEIGHTS ..................................................................................................................................................... 58
HOT WATER/STEAM COIL CONNECTION LOCATIONS .................................................................................... 61
POWER/CONTROL ENTRY DRAWING – 50–61 MODELS ................................................................................. 62
GUIDE SPECIFICATIONS ..................................................................................................................................... 63

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Introduction
Better Economy...
Lower total cost of ownership
• Accurate Ventilation Control: Ensures that no more than the proper amount of ven-
tilation air is utilized. This avoids the energy cost of conditioning excess outside air
andsimultaneouslymonitorsallotherunitfunctionsformaximizedenergyefciency.
• Flexible Design: CongurationssimplifythedesignprocessandallowtheTemp-
Master OmniElite to be applied to virtually any building application.
• Easy Access: Through double-wall access doors, spacious compartments and sup-
portiveoorstoimproveserviceability.
• Scroll Compressor: Provides high efciency, quiet operation, and maximumreli-
ability.
• Modulating Gas Heat Option: Precise temperature control in heating mode.
Better Ecology...
Indoor air quality features for the indoor environment
• Double-Wall Construction: Theroof,oor,doors,andwallspreventinsulation-
bers from entering the conditioned air. The inner liner also facilitates periodic clean-
ing of the unit to prevent harmful build-up of bacteria or contaminants.
• Filtration: Up to MERV 14, the lters provide high air quality in buildings.Temp-
Masterisprovidingdifferentchoicesofltersinmixedairsection,aswellasanal
ltrationoption.
• CO2Sensor: Available to control IAQ. The unit control center uses microprocessor
logic to analyze and optimize ventilation decisions and perform deman ventilation,
aswellasallowairowcompensationtomaintaintheairqualityatahealthylevel.
The TempMaster®OmniElite™Single Package Units –
designed to meet the demands of the market for today and
tomorrow.

TEMPMASTER
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FIGURE 1 - STANDARD CABINET ASSEMBLY
LD20074
12 2
1
6
3
7
4
8
5
10
11
9
Outside Air
Exhaust Air
13

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1. Modulating or Staged Gas Heat
• Available in stainless steel as an option.
• Suitable for natural or propane gas as an option.
• Modulating gas heat is available for improved temperature control.
• Staged gas has three modules (375 mbh with two staged each) available for TMAL
units with bottom discharge, and two are available with left-side discharge.
2. Advance Single Package Unit Controller
• Microprocessor-based single package IPU controller.
• Factory-installed, programmed and commissioned with I/O capabilities and control se-
quences.
• Easy access for diagnostics.
• BACnet or LonWorks communications capabilities.
3. Double-Wall Construction
• Standard construction of the TempMaster OmniElite.
• Powder coated, pre-fabricated panels.
• Corner post for maximum exterior surface protection
4. Filters Section-TempMasterOmniElitehasmultipleltrationoptionstoimproveIAQ
• 2" cleanable
• 2" pleated MERV 8
• 2" carbon MERV 8
• 2" MERV 8 (pre-filter) + 12" MERV 11
• 2" MERV 8 (pre-filter) + 12" MERV 14
5. Scroll Compressors
• Reliable, efficient, trouble-fee operation.
• Simplicity of a hermetic scroll compressor allows the use of fewer moving parts to
minimize breakdowns.
• Two compressors per circuit and two circuits per unit proved redundancy and help
maintain comfort inside your building.
6. Double Width, Double Inlet (DWDI), Forward-Curved Supply Fan or Airfoil
Supply Fan
• Airfoil supply fan - option offers higher efficiency and lower sound in certain applica-
tions.
• Forward-curved fan - suitable for medium static pressures and high air-flows.
7. Economizer
• Modulating outdoor air and return air dampers helps improve IAQ in your building.
• Available with low-leak dampers as an option.
• TMAL can be equipped with one of three types of economizer control: dry bulb,
single enthalpy, or dual enthalpy.
8. Exhaust or Return Fan
• Exhaust fan - available with constant-speed exhuast fan or with VFD to modulate
the speed.
• Return fan - includes SWSI plenum fan(s) to control building pressure. The fan mo-
tors are driven by VFD to maintain a constant return plenum pressure.
9. Evaporator Coil
• Copper fins (optional) are available for extreme climate conditions.
10. Condenser
• Copper fins (optional) are available for extreme climate conditions.
11. Condenser Fans
12. Rain Hoods
13. Modulating Hot Gas Reheat
• Provides comfort benets and energy efcient operation to building applications
wherespacedehumidicationisacustomerconcern.
Features and Benefits

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AIRFLOW CONFIGURATIONS
Variable-Air-Volume – TempMaster OmniElite units are available for a traditional over-
head Variable Air Volume system. In this configuration, the Supply Fan speed is controlled
by a VFD to maintain duct pressure. The duct pressure setpoint can be fixed or it can
be reset via a BAS or a 0-5VDC analog input for optimized duct static pressure control.
Operating mode (colling, heating, ventilation) changes are controlled by the Return Air
Temperature. However, a space temperature sensor or BAS must be used for Night Set
Back and Morning Warm Up operation.
Note: For duct pressure control, a Duct Static Pressure Transducer is included. However,
5/16- or 1/4-inch plastic tubing and a static pressure probe must be field supplied/installed
approximately 3/4 down the longest supply duct run.
Single Zone VAV – TempMaster OmniElite is available for single zone variable air volume
(VAV) applications in compliance with ASHRAE 90.1-2010 and 2013. In cooling mode,
refrigeration capacity or compressor stages are cycled on or off to maintain supply air
temperature. Likewise in heating, additional stages are cycled on or are modulated on to
maintain supply air temperature setpoint. The supply fan speed is modulated to maintain
zone temperature setpoint. The TempMaster OmniElite uses either a BAS signal or a
zone temperature sensor to determine zone temperature and deviation from setpoint.
EitheraBASsignalorazonetemperaturesensorisrequiredintheconditionedspace.
COOLING AND HEATING CONFIGURATIONS
Cooling Only–Forapplicationswherenoheatisrequired,orheatingisprovidedelse-
where within the building HVAC system, cooling only units include an empty discharge
plenum. Supply duct connections are configurable for bottom, left or right discharge. The
supply air temperature sensor is included and factory-installed.
Staged Gas Heat –Forapplicationsrequiring gasheat formorningwarm-up,orother
heating needs, a staged natural gas furnace is available. The furnace is located in the
discharge plenum, downstream of the supply fan. The supply air temperature sensor is
located across the face of the supply duct opening in the unit. Furnaces are designed in
375 mbh modules with two stages each. Three 375 mbh modules are available on the
TMAL050-061 with bottom discharge and two are available on the TMAL050-061 with left-
side discharge. Ignition and safety controls are included and factory-wired.
Modulating Gas Heat – For more precise control of temperature, a modulating gas heat
option is available. Furnaces are designed in 375 mbh modules with three turndown ra-
tions in 8:1 increments. On TMAL050-065, there are 8:1, 16:1, and 24:1 turndown rations.
Gas furnace is suitable for natural gas applications and liquid propane applications.A
conversionkitisrequiredforliquidpropaneapplications.
Both staged gas and modulating gas are available in the stainless steel version.
Modulating Hot Gas Reheat – The TempMaster OmniElite Modulating Hot Gas Reheat
(HGRH) design provides comfort benefits and energy efficient operation to building ap-
plications where space dehumidification is a customer concern.
Variableoccupancybuildingdesigncombined withhighOAorventilationrequirements
placeauniquedemandontypicalpackagedrooftopunitoperation.Duringpartialorlow
load occupancy use or during high humidity OA loads, when space temperature is met,
the refrigeration system will cycle off after short operating periods. These short operating
cycles can lead to humidity control problems and overcooling of the space. The Temp-
Features and Benefits (Cont'd)

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Master OmniElite Modulating HGRH option redirects the hot refrigerant gas leaving the
compressor to a separate coil downstream of the evaporator cooling coil, in effect provid-
ing reheat function (at no additional energy cost) for the air off the cooling coil. Educational
facilities, places of worship, restaurants, gymnasiums, and museums/learning centers are
all applications that benefit from the enhanced humidity control of TempMaster OmniElite
Modulating HGRH rooftop option.
The TempMaster OmniElite unit IPU controller energizes the HGRH operation when de-
humidification is needed, controlling the modulating valve, reheat coil, and cooling coil to
maintain the consistent levels humidity and temperature control needed by the building
space. This operation adds sensible heat to the supply air being delivered to the space
and allows the evaporator cooling coil to operate at a lower temperature, removing excess
moisture without overcooling the conditioned space.
Altitude – (1000 feet up to 6000 feet) If your product's destination is above sea level,
please select current altitude. Due to air density, corrections are needed to outline the cor-
rect unit performance. The altitude will affect cooling and gas heating performance. It will
not affect other heating options, such as electrical, hot water, or steam coils. Most likely, in
order to maintain desired static pressures at highter altitudes, higher RPM moters may be
required.Atthesametime,lowerheatmayberequiredduetoadecreaseinairdensity.
Highaltitudeheatingoptionswillberequiredforaltitudehigherthan2000feetabovesea
level. All calculations are for the U.S. territory.
Electric Resistance Heat – For applications where electric heat is desired, a slip-in elec-
tric resistance heat element is available in sizes from 40-150 kW depending on the rooftop
model size. The number of stages varies by size and voltage, but all have a minimum of
two stages of capacity. Units with electric heat are ETL listed.
Hot Water Heat – For applications where hot water is available for heating, a hot water
heating coil is available. A range of coil fin count selections are available to properly size
the heating for the application. Units with hot water heat are ETL listed. See Hot Water/
Steam Coil Connection Locations on page 57, Table 2 on page 21, and Table 11 on
page 31 for more information.
Steam Heat – For applications where steam is available for heating, a steam heating coil
is available. A range of coil fin count selections are available to properly size the heating
for the application. Units with steam heat are ETL listed. See Hot Water/Steam Coil Con-
nection Locations on page 57, Table 2 on page 21, and Table 12 on page 31 for
more information.
POWER OPTIONS
Single-point supply with terminal block – This configuration is standard, and includes
three terminals for the incoming 3-phase power and is the standard configuration for the
TempMaster OmniElite product. It includes the enclosure, terminal-block, and intercon-
necting wiring to the compressors, heater and furnace controls, all fans, etc. In this con-
figuration,coderequiresthatameansofdisconnect(notprovided)mustbeinstalledat
thesitewithinline-of-sightoftheequipment.
Single-point supply with non-fused disconnect switch – This option is the same as
the single-point with terminal block option except it includes a unit-mounted through-the-
door manual non-fused disconnect switch with an external, lockable handle (in compli-
ance with Article 440-14 of N.E.C.). This option provides a means to isolate the unit power
voltage for servicing. Others must supply separate external fusing which must comply with
the National Electric Code and/or local codes.

TEMPMASTER
FORM TPM1-EG1 (516)
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Dual-point supply with terminal block – This option includes enclosure, terminal blocks
circuited to the supply and exhaust fans and control transformer and a second set of
terminal blocks with interconnecting wiring to the compressors, heat (if applicable) and
condenser.
Convenience Outlet – This option includes a powered 115V GFCI convenience outlet
that can be used for powering tools or lights for servicing. A protective cover plate is in-
cluded while not in use. The outlet is located on the bottom left hand corner of the power
panel.
CONTROL FEATURES AND OPTIONS
Standard Controller
Microprocessor-Based Single Package IPU Unit Controller –All TempMas-
ter OmniElite units are equipped with a factory-installed, programmed and com-
missioned unit controller with all I/O capabilities and control sequences.  The con-
trols include all on-board diagnostic, safety and control features to operate the single
package unit. A multimedia card interface is included for software upgrades and can
be used for data logging to simplify equipment troubleshooting.  Communication
ports are included as standard with three alarm outputs, a shutdown contact, remote
start/stop input, smoke ventilation controls, analog inputs for supply air temperature
and duct static pressure rest, along with a variety of other capabilities.
Optional Controller
Standard Ambient – TMAL050-061 models operate down to 40.0 °F as standard.
Low Ambient – This option includes low ambient control of the first refrigerant circuit
down to 0.0 °F through the use of discharge pressure transducer on circuit one, and
condenserfanspeedusingavariable-frequencydriveonthefirstcondenserfanofcircuit
one. Mechanical cooling with circuit two is locked out below 45.0 °F (adjustable).
SENSOR AND THERMOSTAT AND SENSOR OPTIONS
Wall-Mount Temperature Sensor – A thermistor zone sensor for wall mounting. This
zone sensor is for sensing temperature only, and does not include any setpoint adjust-
ment features.
Programmable Thermostat – This option is for a ship-loose thermostat to interface with
the TempMaster OmniElite unit. All models, TMAL050-061, include an interface for a
7-wire thermostat as standard.
COMMUNICATIONS
BACnet MSTP (RS-485) Communications – This communication is standard with the
IPU controller. Communications to the unit are through a twisted pair, and the wire termi-
nations are on the primary unit control board.
Modbus RTU Communications – This communication is standard on every TempMaster
OmniElite unit and can be used in lieu of the BACnet communications (only one can be
used at a time).
Features and Benefits (Cont'd)

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TEMPMASTER 11
FILTER OPTIONS
Filter Options – Two-inch throwaway, cleanable MERV 8 filters in an angled rack are
available.Forhigher filtrationrequirements,optional rigidfilterracksare availablewith
2-inch MERV 8 plus 12-inch MERV 11 filters or 2-inch MERV 8 plus 12-inch MERV 14
filters. Two-inch pre-filters are included with rigid filter options. The rigid filter rack option
isavailablewithoutfiltermediawherefield-suppliedfiltersarerequired.
OUTSIDE AIR DAMPER OPTIONS
Manual Damper – This option includes a manually adjustable outside air damper. It is manu-
ally adjustable at the unit by setting a mechanical stop between 0-100 percent.
Two-Position – This outside air damper option is controlled to two positions, opened and
closed. Determination of the damper position is based on the occupancy schedule. In the
occupied mode, the outside air damper is positioned to the manually configured point (set
by mechanical stop). In the unoccupied mode, the damper is fully closed.
Modulating Economizer – This option includes modulating outdoor air and return air
dampers that are interlocked and positioned by fully modulating, solid-state damper ac-
tuators. Control of the damper is via a standard ambient outdoor air dry bulb sensor, or
optional single or comparative enthalpy controls.
Rain Hoods on Outside Air Intakes – For all options with outside air intake openings,
rainhoodsareprovidedasstandardtokeepmoisturefromenteringtheequipment.Rain
hoods are an integral part of the unit and are rotated into place.
CO2Sensors –Optional carbon dioxide sensors for occupied space that operate demand
ventilation control opening outside air dampers to ventilate the building. The CO2sensors
can operate in a single or comparative control scheme.
RELIEF SYSTEM
Barometric Relief – Optional building air exhaust shall be accomplished through baro-
metric relief dampers installed in the return air plenum. The dampers will open relative
to the building pressure. The opening pressure shall be adjustable via a spring tension
adjustment.
Modulating Powered Exhaust with Damper Control– This option consists of a con-
stant-speed exhaust fan with a discharge damper that is modulated to control the flow
of exhaust air. The damper control logic is based on the building static pressure setpoint
within the unit controller.
Modulating Powered Exhaust with a VFD – This option consists of a VFD to modulate
the speed of the exhaust fan to control the flow of exhaust air. The VFD control logic is
based on the building static pressure setpoint within the unit controller.
Powered Return Fan with Exhaust – This option uses SWSI plenum fan(s) to control
building pressure. The fan motors are driven by a VFD to maintain a constant return
plenum pressure. An exhaust hood with a modulating control damper is used to maintain
building pressure via the building static pressure. The powered return fan is also available
without the exhaust capabilities. For units with no exhaust capabilities, the HVAC system
must provide alternate means of controlling building pressure.

TEMPMASTER
FORM TPM1-EG1 (516)
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SUPPLY FAN OPTIONS
DWDI Forward-Curved Supply Fan – The standard supply air blower is a forward-curved
supply fan. This fan is good for medium static pressures and high airflows.
DWDI Airfoil Supply Fan – An optional airfoil blade supply fan is available on all models
for higher static conditions. This option offers higher efficiency and lower sound in certain
applications.
Fan Skid Isolation – The entire supply fan assembly is isolated from the unit base with
one (standard) or two-inch deflection springs.
Supply and Exhaust Fan Motors – High efficiency open drip-proof (ODP) type and high
efficiency total enclosed fan-cooled (TEFC) motors are available, all meeting the Energy
Policy Act of 1992 (EPACT).
Supply Fan VFD and Manual Bypass – For VAV applications, VFDs are provided to
modulate air flow. Optional manual bypass can also be provided to allow full airflow in the
event of a VFD failure.
EVAPORATOR SECTION
Copper Fins – For more extreme climates that can aggressively attack aluminum, cop-
per tube evaporator coils with copper fins are available. (This is not recommended for
units in areas where they may be exposed to acid rain or environments where ammonia
is present.)
CONDENSER FEATURES AND OPTIONS
Scroll Compressors – Reliable, efficient, trouble-free operation is the true measure of a
packaged rooftop’s value. That’s why TempMaster OmniElite Packaged Air Conditioners
use established scroll compressor technology to deliver dependable, economical perfor-
mance in a wide range of applications. With the TempMaster OmniElite Packaged Roof-
top Units, you get the latest generation of compressor enhancements added to the scroll’s
inherent strengths. The simplicity of a hermetic scroll compressor allows the use of fewer
moving parts to minimize breakdown.
Multiple Compressor Staging – Through the use of the scroll compressor, the Temp-
Master OmniElite has the ability to stage its cooling by enabling and disabling multiple
single stage compressors on multiple circuits. These compressors are manifolded to-
gether in pairs on a single refrigeration circuit.
Compressor Circuiting – The TempMaster OmniElite is designed so that only two scroll
compressors are in tandem within one refrigeration circuit. This means more reliable com-
pressors,andlessequipmentdowntime.Withmultiplecircuits,ifacompressorshould
ever fail on one circuit, the other circuit will remain operational to work to maintain occu-
pied loads. The TempMaster OmniElite system has two circuits in a unit.
Condenser Fan Motors – The condenser fan motors used on the TempMaster OmniElite
unit are Totally Enclosed Air Over (TEAO) to provide maximum durability through any
season.
Hot Gas Bypass – This option permits continuous, stable operation at capacities below
the minimum step of unloading by introducing an artificial load on the evaporator. For
models TMAL050-061, it is used on the lead circuit and standard on VAV units.
Replaceable Core Liquid Line Driers–LiquidlinedriersarestandardontheTempMas-
ter OmniElite unit. An option is provided for replaceable core driers.
Features and Benefits (Cont'd)

FORM TPM1-EG1 (516)
TEMPMASTER 13
Copper Fins – For more extreme climates that aggressively can attack aluminum, copper
tube condenser coils with copper fins are available. (This is not recommended for units in
areas where they may be exposed to acid rain or environments where ammonia is pres-
ent)
Pre-Coated Fins – An epoxy-coated aluminum fin stock to guard against corrosive agents
and insulate against galvanic potential. Recommended for mild seashore or industrial lo-
cations.
Post-Coated Fins – Technicoat coil-coating process used on condenser coils for sea-
shore and other corrosive applications (with the exception of strong alkalis, oxidizers, wet
bromide, chlorine and fluorine in concentrations greater than 100ppm).
Compressor Sound Blankets – Optional compressor acoustic sound blankets are avail-
able for sound sensitive applications.
ROOF CURBS
Partial perimeter roof curbs – This option includes a knock-down 14"high roof curb for
use with wood nailer (by others). Roof curb supports the air handling section with a sepa-
rate support under the condenser end.
CABINET FEATURES AND OPTIONS
Double-Wall Access Doors – Full-sized access doors provide easy access into the unit
for routine maintenance and inspection. Solid wall liners encase insulation and prevent
damage and erosion into the airstream.
Industry-leading 1,000-hour salt-spray rating, per ASTM B117, keeps unit in superior con-
dition.
TempMaster OmniElite packaged systems are offered with two common foot prints (stan-
dard and extended). The extended cabinet allows for left or right side discharge with
hydronic heating coils. Note: Electric heat and gas are not available options for extended
cabinet.
Double Wall Construction – Double-wall construction is the standard construction of the
TempMaster OmniElite and incorporates powder coated pre-fabricated outer panels and
corner post for maximum exterior surface protection.
Factory Shrink-Wrap – TempMaster OmniElite units are shipped from the factory with
factory-applied shrink-wrap packaging. No longer does the contractor need to worry about
dirt and debris clogging up condenser coils or moisture leaking into the air handler on the
unit’s way to the job site or rigging yard.
ACCESSORIES
Filter Switch – An optional dirty filter alarm can be provided that will activate an alarm
whenthefiltersrequirecleaning.
Magnahelic Filter Pressure Gauge–On unitsequippedwith downstreamfiltration,a
magnahelic filter gauge is included and visible on the exterior of the unit. The filter gauge
measures the air pressure drop through the rigid filter bank to indicate when replacement
isrequired.

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TEMPMASTER 15
Application Data
GENERAL
The TempMaster OmniElite air conditioning units are designed for outdoor installation.
When selecting a site for installation, be guided by the following conditions:
• Unit must be installed on a level surface.
• For the outdoor location of the unit, select a place having a minimum sun exposure
andanadequatesupplyoffreshairforthecondenser.
• Also avoid locations beneath windows or between structures.
• Optional condenser coil protection should be used for seashore locations or other harsh
environments.
• The unit should be installed on a roof that is structurally strong enough to support the
weightoftheunitwithaminimumofdeection.Itisrecommendedthattheunit(s)be
installed not more than 15 feet from a main support beam to provide proper structural
support and to minimize the transmission of sound and vibration. Ideally, the center
of gravity should be located over a structural support or building column.
• Locationofunit(s)shouldalsobeawayfrombuildinguestacksorexhaustventila-
tors to prevent possible reintroduction of contaminated air through the outside air
intakes.
• Be sure the supporting structures will not obstruct the duct, gas or wiring connec-
tions.
• Proper service clearance space of 6-feet around the perimeter of the unit, 8-feet on
onesideforcoilservicing,and12-feettoanyadjacentunitsisrequiredtoeliminate
cross contamination of exhaust and outdoor air, and for maintenance tasks such as
coil pull and cleaning. No obstructions should be above the condensing unit section.
LOCATION
Ofthemanyfactorsthatcaneffectthelocationofequipment,someofthemostimportant
to consider are Structural, Acoustical and Service clearances. Proper attention should be
madeatthedesignstagetoensureproperstructuralsupport.Incaseswhereequipment
isbeingreplaced,beawareofbuildingdesigntoinsuresupportisadequatefortheap-
plication.
Thenextmostimportant consideration in applyingrooftopequipmentisthat of sound
fromtheequipment.Specialcareshouldbemadetokeeptherooftop unitawayfrom
sound sensitive areas such as conference rooms, auditoriums and executive offices and
any other room that may have potential for tenant occupancy. Possible locations could be
above hallways, mechanical or utility rooms.
Finally, service clearances should be maintained in design to insure safe access to the
unit. Unit clearances are designed so that technicians have enough space between units,
building walls, and edges of building to gain access safely. In cases where space is limited,
please call your local representative for additional information.

TEMPMASTER
FORM TPM1-EG1 (516)
16
96"
LD08044
NOTE:
1. Under certain conditions these clearances may be encroached upon. However, doing so may impact
system performance.
2. This is a visual reference for all TempMaster OmniElite units.
FIGURE 2 - UNIT CLEARANCES
RIGGING
Properriggingandhandlingoftheequipmentismandatoryduringunloadingandsettingit
into position to retain warranty status. Rigging and lifting should only be done by a profes-
sional rigger in accordance with a written rigging and lifting plan. The most appropriate rig-
gingandliftingmethodwilldependonjobspecificfactors,suchastheriggingequipment
available and site needs. Therefore, a professional rigger must determine the rigging and
lifting method to be used, and it is beyond the scope of this guide to specify rigging and
lifting details.
Spreader bars must be used by cranes to prevent damage to the unit casing. All lifting
lugs must be used when lifting the unit. Fork lifts will damage the unit and are not recom-
mended. Care must be taken to keep the unit in the upright position during rigging and to
prevent damage to the watertight seams in the unit casing. Avoid unnecessary jarring or
rough handling.
UNIT PLACEMENT
• Elevated – Elevated roof curbs or dunnage steel can be used to support the unit in
ordertoraiseittospecicheights.Whenthistypeofplacementisrequired,besure
tokeepunitaccessinmind.Cat-walksorotherformsofunitaccessmayberequired
to one or both sides of the unit, depending on your area of the country and the local
codesthatareenforced.Pleasecheckwithlocalofcialstoensuretheapplication
conforms to local codes and regulations.
• Ground Level Locations – It is important that the units be installed on a substantial
base that will not settle, causing strain on the refrigerant lines and sheet metal and
resulting in possible leaks. A one-piece concrete slab with footers extended below the
frost line is highly recommended. Additionally, the slab should be isolated from the
main building foundation to prevent noise and vibration transmission to the building
structure. For ground level installations, precautions should be taken to protect the
unit from tampering by, or injury to, unauthorized persons. Erecting a fence around
the unit is common practice.
Application Data (Cont'd)

FORM TPM1-EG1 (516)
TEMPMASTER 17
• Roof curb – TempMaster offers optional roof curbs designed specically for the
TempMaster OmniElite footprint. This curb comes as an open condenser model and
is shipped disassembled and requires eld assembly and installation. For bottom
supply and return openings, the curbs have matching connections to ease installa-
tion. A pipe chase that matches the unit pipe chase is also included in the curb foot-
print for through-the-curb utility connections. The curb should be located according
to the location recommendations on Figure 12 on page 53, and properly sealed
to prevent moisture and air leakage into and out of the duct system. Flexible collars
should be used when connecting the duct work to prevent unit noise transmission
and vibration into the building.
TABLE 1 - SUPPLY- AND RETURN-AIR DUCT-CONNECTION CONFIGURATIONS
UNIT CONFIGURATION SUPPLY AIR RETURN AIR
BOTTOM LEFT RIGHT BOTTOM LEFT FRONT
50-65
TONS
Cooling only     23
Cool/gas heat 375-750 MBH   N/A  23
Cool/gas heat 1,125 MBH N/A N/A  23
Cool/electric heat N/A N/A  23
Cool / hydronic heat  11 23
1. Only with Ext Cab
2. Return LEFT is N/A if power return fan was selected
3. Return FRONT is N/A if there is a return fan or any exhaust option
Duct work should be supported independently of the unit.
FS = Supply Fan
DP = Discharge Plenum
CO = Condenser Section
_F = Filter Segments
CC = Cooling Coils
MB = Mixing Box
EE = Economizer
FE = Fan Exhaust
OA = Outside Air
CO
OA
NOTE:
This diagram is provided as a visual reference of the TempMaster OmniElite discharge & return air openings & locations for all sizes. Please
refer to the dimensional data for exact size & location of panels and openings.
FIGURE 3 - DISCHARGE AND RETURN OPENINGS
LD08045
DUCT CONSIDERATIONS
Unlike competitive units where air can leave the unit stratified across the width of the
unit, the TempMaster OmniElite unit sufficiently mixes airflow to ensure consistent air
temperaturefromtheunit.NospecialTeeconsiderationsarerequiredandtheunitmay
be oriented either way.
UNIT ORIENTATION
For applications with multiple units located in close proximity on the roof, the orientation
of the unit may be important to reduce the potential for re-entrainment of outside airflow.
Regardless of the outside air and exhaust air openings on a unit, all applications can per-
mit recirculation of exhaust air to the return, if applied improperly.

TEMPMASTER
FORM TPM1-EG1 (516)
18
HORIZONTAL APPLICATIONS
The spectrum of applications for units in today’s market is continuing to grow wider by
the day. Flexibility in unit design and construction is a must in today’s market in order to
insuresafeandsoundapplicationsofHVACequipment.TheTempMaster OmniElite has
been designed for specific application of horizontal supply and return airflow taking the
guess work out of unit application by building a unit specific to these needs. If the applica-
tion calls for horizontal supply and return air, TempMaster can ship it from the factory as
ahorizontalunit.Thisoptionalleviatestheneedforfieldmodificationofequipment,sav-
ing time and money. The TempMaster OmniElite can support a left discharge on all units
except 1,125 MBH gas, electric heat, steam, hot water (std. cab) or right discharge on all
cooling-only units. Return air can be brought through the rear (only if return fan and any
exhaust option was NOT selected) or left (only if return fan was NOT selected), making
the unit specific to building needs.
ECONOMIZER
The economizer section is used for ventilation of the conditioned space to maintain indoor
airquality,andalsotoreduceenergyconsumptionbyusingoutdooraircoolinginlieuof
mechanical cooling. If outdoor air is appropriate for cooling, but not sufficient for the cool-
ing demand, mechanical cooling will stage on as necessary until the cooling load is met.
Dual (comparative or differential) enthalpy operation is the most accurate and efficient
means of economizer operation. The unit controller monitors the return and outside air
energy content, and selects the lower of the two for operation.
VAV SUPPLY AIR PRESSURE CONTROL
Traditional packaged systems use inlet guide vanes (IGVs) for duct static pressure con-
trol. These control supply duct pressure by modulating dampers (introducing losses and
inefficiencies)ontheinletofthefan,openandclosed.TempMaster’svariablefrequency
drives(VFDs)offersuperiorfanspeedcontrolandquieter,energyefficientoperation.
FIGURE 4 - TRADITIONAL OVERHEAD VAV AIR DELIVERY SYSTEM
For VAV applications, the TempMaster OmniElite unit uses a VFD to modulate fan speed
and maintain a constant duct static pressure. VFDs offer superior control over the opera-
tionoftheunitatpartload,andoffertheadditionalbenefitsofquieterandmoreefficient
operation when compared to IGV.
Application Data (Cont'd)

FORM TPM1-EG1 (516)
TEMPMASTER 19
BUILDING PRESSURE CONTROL SYSTEMS
Building pressure control systems are often necessary when economizers are used to
bring in outdoor air. Without proper building exhaust, the building may become over pres-
surized. The pressure control system maintains the proper building pressure by expelling
the appropriate amount of air from the building.
Exhaust/Relief Fans
In this application, a powered exhaust fan may be suitable, however careful consideration of
the fan type is necessary. TempMaster offers a centrifugal powered exhaust fan to perform
this function. Some manufacturers use a propeller exhaust fan, which cannot handle the
staticpressurerequirements.
For systems with moderate to low return static pressure, an exhaust fan is recommended.
The benefit of the exhaust fan is that it does not run all of the time, and may facilitate com-
pliancewiththeASHRAE90.1fanmotorhorsepowerrequirement.
The exhaust fan operates in parallel with the supply fan. In this arrangement, the supply
fanhandlesthefullstaticpressurerequirementsofthesystem.Fornormalbuildingpres-
sure control, the exhaust fan operates to draw air from the return plenum and exhaust it
out of the building.
The exhaust fan configuration is available in two forms, modulating and non-modulating.
Modulating is the most common and recommended for the majority of applications, while
non-modulating should be used in certain circumstances.
In the modulating exhaust system, the volume of airflow exhausted from the building is
proportional to the entering volume of outside air. Control is accomplished via either a
dischargedamperoravariable-frequencydrive(VFD).TempMasterrecommendstheuse
of a VFD to reduce energy consumption, sound levels and improved reliability.
In the non-modulating exhaust system, the exhaust airflow is constant whenever the ex-
haust fan is operating. This type of control should only be used to either assist a smoke
purgesystemorwhenasystemrequiresaconstantvolumeofexhaustairflow.
ACOUSTICAL CONSIDERATIONS
The TempMaster OmniElite unit is designed for lower sound levels than competitive units
by using flexible fan connections, fan spring isolators, double-wall construction, multiple
fan options, and lower speed and horsepower fans. For VAV applications, VFDs are used
instead of inlet guide vanes. Additional sound attenuation can be obtained using compres-
sor sound blankets and field-supplied sound attenuators when necessary.
Evenwiththeseequipmentdesignfeatures,theacousticalcharacteristicsoftheentirein-
stallation must never be overlooked. Additional steps for the acoustical characteristics of
an installation should be addressed during the design phase of a project to avoid costly
alterationsaftertheinstallationoftheequipment.Duringthedesignphaseofaproject,the
designingengineershouldconsider,ataminimum,theimpactoftheequipmentlocation,
installation, building structure, and duct work.

TEMPMASTER
FORM TPM1-EG1 (516)
20
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