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GTFC-13HVACHEATINGPRODUCTSApplication ManualHUSeriesXF/XCSeriesGGSeriesGAS-FIRED HEATING EQUIPMENT High Efficiency Unit Heaters Tubular Unit Heaters Duct Furnaces Cabinet Blowers
Unit HeatersHU SeriesXF SeriesGG SeriesXC SeriesContentsAPPLICATIONSPAGE3HU SERIES4–7GG SERIES8 – 11CAB SERIES25 – 27OPTIONAL ACCESSORIES – All Series28 – 29HEAT THROW DATA – All Series30 – 31XF/XC SERIES12 – 15NOZZLE DIMENSIONTD SERIES16 – 19TYPICAL STANDARD SPECIFICATIONSQVED/QVES/QVSD SERIES20 – 24WARRANTY – All Series2PAGE3233 – 3435
ApplicationsBuilding MaterialUNIT HEATER PLACEMENTGas-fired unit heaters are used primarily in commercial and industrial buildingssuch as warehouses, manufacturing areas, garages, showrooms, lobbies, etc.Placement is typically determined by air distribution requirements. Properdistributions should have air directed toward areas of greatest heat loss. Multipleunits may be used to greatest effect by positioning units around the perimeter.Several units near the center and with air discharging toward outside walls mayalso satisfy the heating requirements. Direct air discharge on occupants shouldbe avoided.TYPICAL APPLICATIONSA large square area withA narrow area with fourexposed walls and roof;exposed walls either withunits are blanketing allor without roof exposure.exposed surfaces.A small area withexposed wallsrequiring oneunit.HOW TO CALCULATE HEAT LOSSIt is suggested that when calculating heat loss for a building, reference be madeto procedures outlined in the ASHRAE Handbook. As an easy reference, however,the following abbreviated method may be used with a good degree of reliability.1. Determine inside temperature to be maintained and the design outsidetemperature for your locality. The difference between these two figures isthe design temperature difference.2. Calculate net areas in square feet of glass, wall, floor, and roof exposed tooutside temperature or unheated spaces. Calculate door as all glass.3. Select heat-transfer coefficients from the table below (or the ASHRAEHandbook) and compute the heat-transmission loss for each area inBTU/HR by multiplying each area by the heat-transfer coefficient andthe temperature difference.4. Add 10% to the heat-loss figures for areas exposed to prevailing winds.WALLSPoured concrete 80#/cu. feet8-inch .12-inch .Concrete Block, hollow cinderaggregate8-inch .12-inch .Gravel aggregate8-inch .12-inch .Concrete Block, w/4-inch facebrickGravel, 8-inch . .Cinder, 8-inch . .Metal(un-insulated) .w/1-inch blanket insulation .w/3-inch blanket insulation .ROOFINGCorrugated Metal (un-insulated) .w/1-inch bolt or blanket .w/1-1/2 -inch bolt or blanket .w/3-inch bolt or blanket .Flat Metalw/3/8 -inch built-up roofing . .w/1-inch blanket insulationunder deck . .w/2-inch blanket insulationunder deck . .Wood/ 1" /(un-insulated)w/3/8-inch built-up roofing . .w/1-inch blanket insulation .Wood/ 2" /(un-insulated)w/3/8 -inch built-up roofing .w/1-inch blanket insulation .Concrete slab/ 2" /(un-insulated)w/3/8 -inch built-up roofing .w/1-inch insulation board . .Concrete slab/ 3" /(un-insulated)w/ 3/8 -inch built-up roofing .w/1-inch insulation board . .Gypsum slab/ 2" /(un-insulated)w/1/2 -inch gypsum board .w/1-inch insulation board . .Gypsum slab/ 3" /(un-insulated)w/ 1/2 -inch gypsum board .w/1-inch insulation board . .WINDOWSVertical, single-glass .Vertical, double-glass, 3/16 - inch airspace .Horizontal, single-glass (sky light)DOORSMetal — single sheet .Wood, 1-inch . .2-inch . 0.435. Calculate the volume of the room or area in cubic feet and multiply by theestimated number of air changes per hour due to infiltration (usually fromone to two). Determine the number of cubic feet per hour of air exhaustedby ventilating fans or industrial processes. Substitute the larger of thesetwo figures in the formula to determine the heat required to raise the airfrom outside to room temperature —BTU/HR cubic feet per hour x temperature difference556. The totals of BTU/HR losses from 3, 4 and 5 (above) will give the totalBTU/HR to be supplied by unit heaters. (Note: If processes performed inthe room liberate considerable amounts of heat, this may be determinedas accurately as possible and subtracted from the total).3
HU Series — High Efficiency Unit HeaterGeneral InformationDESCRIPTIONNexus brings leading edge condensing heat exchangertechnology to Sterling HVAC’s successful unit heater productoffering. Engineered for performance, Nexus incorporatesstate-of-the-art control and combustion technologies.Nexus’s tri-metal condensing heat exchanger, control platform,and proprietary fully modulating pre-mix burner design, safelyprovide industry leading operating efficiencies. Nexus units arecertified by ETL as 95 % thermal (combustion) efficient and upto 99% maximum efficiency at full turndown!HIGH EFFICIENCY HEAT EXCHANGERNexus’ tri-metal heat exchanger is the most advanced onthe market today. The stainless-steel tubes allow for fullmodulation without the fear of premature failure due to thecorrosive flue condensate, while the highly conductivebrass and aluminum fins optimize heat transfer formaximum efficiency.DIRECT SPARK IGNITION SYSTEMNexus units utilize a direct spark pilotless ignition of theburner, providing fast heat delivery. This highly reliable andefficient ignition system incorporates an integratedelectronic control board to regulate the system sequence ofoperation, including externally mounted LED indicators forsimple troubleshooting.DDC CONTROLThe unit includes a proprietary control board specificallydesigned for use with the Nexus unit heater. The control boardwas designed with safety in mind including “SafeSense”technology to detect blocked inlet and flue conditions. Thecontrol board will automatically adjust the unit for altitudewithout requiring field modification. The unit will alsoself-adjust its operation to maintain clean combustionwithout decreasing performance.Designed with ease of service in mind, the unit can quickly bechanged from one gas control to another with a simple DIPswitch adjustment on the control board without the need toreplace components. In addition, all units come with Modbus asstandard on the control board to allow the unit to communicatewith the Building Automation System via Modbus. This willallow the building automation system to monitor and changeset points remotely without the need to go to the unit orinstall additional controls in the field.4VENTINGThe Sterling HU Series is ETL certified in accordance withcategory IV venting requirements. This certification allowsunits to be vented either vertically or horizontally in bothstandard and separated combustion applications. Whereallowed by code, PVC or CPVC may be used in lieu of single ordouble wall vent pipe allowing for an easier and morecost-effective venting installation.SEPARATED COMBUSTIONSeparated combustion “separates” the combustionprocess from the environment where the unit is installed.The combustion blower draws a controlled quantity ofcombustion air from outside the building. All criticalcomponents including the burners, direct spark ignition,and flue system are fully enclosed within the unit andprotected from the atmosphere in the space where theheater is located ensuring clean and efficient combustion.Separated combustion is designed for units installed industy, dirty or mildly corrosive environments or where highhumidity or slightly negative pressures exist.CONTROL ACCESSIBILITYDesigned with the service person in mind, Nexus has aseparate control box located on the rear of the unit for easeaccess to the unit control board.10-YEAR WARRANTYSterling HVAC warranties the heat exchanger, flue collectorand burners of each unit heater to be free from defects inmaterials and workmanship for a period of 10 years from thedate of manufacture.
HU Series — High Efficiency Unit HeaterSTANDARD FEATURES 409 Stainless Steel Tubes with Brassand Aluminum Fins 321 Stainless Steel Flue Collector 95 % Thermal Efficiency 115/1/60 Supply Voltage Combustion Blower & Power Ventor Blocked Inlet Air Pressure Switch Blocked Vent Air Pressure Switch Natural or Propane (LP) Gas 20-Gauge 430 Brushed StainlessSteel CabinetryOPTIONAL FEATURES Supply Voltages: 208 and 230/1/60and 208, 230, 460, 575/3/60 2-Stage and Various ElectronicModulating Gas Controls Direct Spark Ignition SystemHigh Limit SwitchExternal LED Diagnostic Lights115/24 Volt Control TransformerEasy Access Isolated Control PanelModbusOpen Drip Proof MotorRear Control Access10 Year Heat Exchanger, Burner andFlue Collector Warranty Single and 2-Stage Mercury FreeThermostats Locking Thermostat Cover Pressure Regulator (1/2-35 PSI) Condensate Neutralizer Negative Pressure Gas ValveRight Side Burner AccessOSHA Fan Guard4 Point SuspensionField Convertible to SeparatedCombustionCondensate TrapCondensate Float SwitchGas Conversion Kit IncludedResidentially Certified for Use as aUtility HeaterCondensate PumpCondensate Pump Shelf KitConcentric Vent KitStratification SensorUnit Number DescriptionDigitNItemXXX — 1Prefix23UT56789 10 11 12 13 14 15 CA4FTFMGTALGCSVMT MS DLAS(Internal Use Only)1,2 - Unit Type [UT]HU - High Efficiency Unit Heater3,4,5 - Capacity [CA]050 - 50,000 BTU/HR100 - 100,000 BTU/HR150 - 150,000 BTU/HR200 - 200,000 BTU/HR300 - 300,000 BTU/HR400 - 400,000 BTU/HR6 - Furnace Type [FT]A - Right Side Access7 - Heat Exchanger (Furnace) Material [FM]1 - Stainless Steel Tubes with Aluminum and Brass FinsNote: Stainless Steel Flue Collector is standard.8 - Gas Type [GT]N - Natural GasP - Propane Gas (LP)9 - Altitude [AL]S - 0-11,999 ft.Note: Installations over 2,000 ft. require gas input deration in the field.Refer to unit installation instructions.10 - Direct Spark Gas Control [GC]1 - Modulating w/Outside Air Reset (Master)2 - Modulating w/Outside Air Reset (Network)3 - Modulating w/Indoor Air Reset4 - Modulating w/2-10 VDC/4-20 mA Input5 - Modulating w/Room Sensing6 - Two Stage11 - Supply Voltage [SV]1 - 115/1/605 - 230/3/602 - 208/1/606 - 460/3/603 - 230/1/607 - 575/3/604 - 208/3/60Z - SpecialNote: Supply Voltage [SV] 2-7 include field mounted step down transformer.12 - Motor Type [MT]1 - Open Drip Proof (Standard)13 - Blower Motor Sizes [MS]0 - Not applicable14 - Design Level [DL]B - Second design level15 - Accessories [AS]†FIELD INSTALLED (AS- )†All Field Installed Accessories are to be entered as a separate line item using the catalog numberwhich utilizes “11AS” as a prefix. i.e: G3 becomes 11AS-G3A7 - High Pressure RegulatorA7-1/2-1 - Regulator for PSI range 0.5-10A7-3/8-1 - Regulator for PSI range 10-20A7-5/16-1 - Regulator for PSI range 20-35E9 - Condensate Neutralizer (Inline)EW - Condensate Neutralizer (Wall Mounted)G1 - 1-Stage Mercury Free Thermostat (Round)G2 - 1-Stage Mercury Free Thermostat w/Guard KitG3 - 1-Stage Mercury Free Thermostat/Fan SwitchG5 - 2-Stage Mercury Free Thermostat w/Fan SwitchG6 - Locking Thermostat CoverG9 - 1-Stage Mercury Free Heating Only ThermostatGW - WiFi Thermostat TH8321WF1001/UH9 - Stratification SensorK8 - Condensate PumpK9 - Condensate Pump ShelfY2 - 2" PVC Concentric Vent Kit (50-150 MBH)Y3 - 3" PVC Concentric Vent Kit (200 MBH)Y4 - 4" PVC Concentric Vent Kit (300-400 MBH)5
HU Series — High Efficiency Unit HeaterPerformance and Dimensional DataUNIT CAPACITY (MBH)PERFORMANCE DATA†Input - BTU/Hr(kW)Output - BTU/Hr(kW)Thermal Efficiency - %Free Air Delivery - CFM(cu. m/s)Air Temperature Rise - F( C)Full Load Amps at 120VMinimum Circuit Amps at 120VMax Overcurrent Protection at 120VMOTOR DATA: Motor HP (Qty)Motor kWMotor Type ODPRPMAmps @ (0.373)57(31.7)10.811.514.11/14 25.11/2 32(1.525)55(30.6)17.619.125.11/2 48(2.288)55(30.6)31.1833.9344.931 ,464(3.050)55(30.6)31.1833.9344.931 (2)0.74PSC1,62522.0† Ratings shown are for unit installations at elevations between 0 and 2,000 feet (0 to 610m). For unit installations in U.S.A. above 2,000 feet (610m), the unit input must be field derated 4% for each1,000 feet (305m) above sea level; refer to local codes, or in absence of local codes, refer to the latest edition of the National Fuel Gas Code, ANSI Standard Z223.1 (NFPA No. 54).For installations in Canada, any reference to deration at altitudes in excess of 2,000 feet (610m) are to be ignored. At altitudes of 2,000 feet to 4,500 feet (610 to 1372m), the unit must be fieldderated and be so marked in accordance with the ETL certification. See HIGH ALTITUDE DERATION section of Installation Manual for deration information.LEGEND:ODP OPEN DRIP PROOFPSC PERMANENT SPLIT CAPACITORUNIT CAPACITY (MBH)DIMENSIONAL DATA - Inches (mm)"A" Height to Top of Combustion Air Inlet"B" Jacket Width of Unit"C" Unit Height"D" Depth to Rear of Housing"E" Hanging Distance Width"F1" Hanging Distance Depth"F2" Hanging Distance Depth"G" Discharge Opening Width"H" Discharge Opening Height"J" Side Panel to Centerline Combustion Air"K" Front Panel to Centerline Combustion Air"L" Overall Unit Depth"M" Side Depth"N" Combustion Air Inlet Connection Dia."P" Flue Connection Diameter"Q" Side Panel to Centerline Gas Connection"R" Bottom Panel to Centerline Gas Connection"S" Side Panel to Centerline Flue"T" Bottom Panel to Centerline Flue"U" Side to Centerline Condensate Drain Connection"W" Rear to Centerline Condensate Drain ConnectionCombustion Air Inlet Pipe Dia. - Inches(mm)* Flue Pipe Dia - Inches(mm)Gas Inlet - InchesApproximate Unit Weight - Lbs(kg)Approximate Ship Weight - (257)4(102)4(102)3/4385(174.6)460(208.6)* Field installed PVC fittings provided with unit sizes 200-400 as follows:- Size 200 units come with a 2" to 3" PVC reducer- Size 300 units come with a 2" to 4" PVC reducer- Size 400 units come with a 2" to 4" PVC drain tee fittingReducers/drain tee fittings are to be field installed per Venting instructions.6SP SHADED POLE
HU Series — High Efficiency Unit HeaterPerformance and Dimensional DataHU050 DIMENSIONAL DATACOMBUSTIONAIR ""T""U"ELECTRICALCONNECTION"E"(HANGING)"R""Q"REAR ""H"(DISCHARGEOPENING)"C""F2"(HANGING)3" (77mm)"M"TOP VIEW4 SUSPENSIONPOINTS(THREADED RODS)BOTTOM VIEW"B"FRONT VIEWCAT-10081DHU100-HU400 DIMENSIONAL DATATOP VIEWCAT-10081D7
Tubular Unit Heaters GG SERIES XF SERIES XC SERIESGeneral InformationSTERLING TUBULAR DESIGN GAS-FIRED UNIT HEATERThe Sterling Tubular gas-fired unit heaters offer a highlyefficient, extremely durable alternative to the traditionalclam shell design. These units combine the latest tubularheat exchanger and inshot burner technology with thequality and reliability you have come to know from Sterling.HIGH EFFICIENCYStandard energy saving features like the direct spark ignitionand power venting reduce standby losses and offer improvedseasonal efficiencies. Tubular units certified by ETL asproviding 83% thermal (combustion) efficiency.TUBULAR HEAT EXCHANGERThe Sterling tubular heat exchanger has been designedto provide maximum and uniform heat transfer. The lowpressure drop associated with this design enables heatedair to be evenly distributed to the conditioned space. Thiscurved, non-welded serpentine design experiences lessthermally induced stress making it highly durable forsignificantly longer service life. All Sterling tubular heatexchangers are constructed of heavy duty 20-gaugealuminized steel. Optional 409 stainless steel heatexchangers are also available.DIRECT SPARK IGNITION SYSTEMSterling Tubular units utilize a direct spark pilotless ignitionof the burner, providing fast heat delivery. This highly reliableand efficient ignition system incorporates an integratedelectronic control board to regulate the system sequenceof operation, including an externally mounted LED indicatorfor simple troubleshooting.8VENTINGThe Sterling Tubular unit heaters are ETL certified inaccordance with categories I and III venting requirements.This certification allows units to be vented both verticallyand horizontally using either single wall or double wallventing materials. This venting flexibility of the unit heatermakes installation easier and more cost effective by allowingthe installer to utilize existing venting components.CONTROL ACCESSIBILITYDesigned with the service person in mind, every componentof the Sterling unit heaters is easily accessible. Ignition andfan controls are located in one centrally located control panel.The access door provides control isolation as well as apleasing exterior appearance.10-YEAR WARRANTYSterling warranties the heat exchanger, flue collectorand burners of each unit heater to be free from defects inmaterials and workmanship for a period of 10 years fromthe date of manufacture.SEPARATED COMBUSTIONThe GG, XF & XC Series heaters are ready for standard orseparated combustion configurations all in one unit. Aseparated combustion configuration “separates” thecombustion process from the environment where the unit isinstalled. A power venting system draws a controlled quantityof combustion air from outside the building. The same systemexhausts flue products to the outside. The burners and fluesystem are enclosed within the unit; thus, the entirecombustion process is unaffected by the atmosphere in thespace where the heater is located. Separated combustionconfigurations are designed to be installed where dusty, dirtyor mildly corrosive conditions exist or where high humidity orslightly negative pressure prevail.
GG Series — Low Profile Unit HeaterRESIDENTIAL ANDCOMMERCIAL CERTIFICATIONSThe Sterling GG Series unit heaterconforms with the latest ETL certificationstandards. Design certified under ANSIZ83.8 for Industrial/Commercial use andResidential use as a utility heater, makethis low profile unit heater the idealselection.STANDARD FEATURES Standard or 120/24V ControlSeparatedTransformerCombustion OSHA Fan GuardAll-In-One Units 115/1/60 82 % ThermalFan Motor withEfficiencyInternal Overload RedundantProtectionSingle-Stage Direct SparkGas ValveIgnitionAdditionally, GG Series units are ready Residential 20-Gauge Cabinetfor installation in either standard orCertificationwith Bakedseparated combustion applicationsEnamel Finishright out of the box. If concentric ventingOPTIONALFEATURESis needed, simply add an optional 409 Stainless Supply VoltageCombustion Air Inlet Kit.Steel HeatExchanger(Field MountedTransformers):— 208/1/60— 230/1/60— 208/3/60— 230/3/60— 460/3/60— 575/3/60 Two-Stage GasControl (Sizes60-120 Only) Stainless SteelFlue Collector 10 Year HeatExchangerWarranty Right HandControl Access Field Convertibleto Left Hand High Limit Switch Air PressureSwitch Natural orPropane Gas Vent Caps Totally EnclosedMotors (Sizes60-120 Only) PressureRegulator(1/2 – 35 psi) Single & Two-StageMercury FreeThermostats Gas ConversionKit Included Easy AccessControl Panel 321 StainlessSteel Burner Box 20-GaugeAluminizedHeat Exchanger Power Vented LockingThermostat Cover 24V SPST Relay CombustionAir Inlet Kits(For ConcentricVenting) Discharge Nozzles(30 , 60 , 90 )Unit Number DescriptionDigitGXXX — 1Item Prefix56789 10 11 12 13 14 15 UT CA234FTFMGTALGCSVMTDLAS(Internal use Only)1, 2 - Unit Type [UT]GG - Residential Low Profile Tubular PropellerNote: Field conversion to Separated Combustion requires a Combustion Air Inlet Kit.See Accessory Options X7-4 and X7-5 for proper unit selection.3, 4, 5 - Capacity [CA]030 - 30,000 BTU/HR045 - 45,000 BTU/HR060 - 60,000 BTU/HR075 - 75,000 BTU/HR090 - 90,000 BTU/HR105 - 105,000 BTU/HR120 - 120,000 BTU/HR6 - Furnace Type [FT]A - Right Hand Access7 - Furnace Material [FM]*1 - Standard (Aluminized) Steel2 - 409 Stainless Steel*Heat exchanger tube material only.8 - Gas Type [GT]N - Natural GasP - Propane (LP) Gas9 - Altitude [AL]S - 0–4,999 feetT - 5,000–11,999 feetNote: Installations over 2,000 feet require gas input deration in the field.Refer to unit installation instructions.10 - Gas Control [GC]A - Single Stage (Standard)B - Two Stage (Capacities [CA] 060 through 120 only)11 - Supply Voltage [SV]1 - 115/1/605 - 230/3/602 - 208/1/606 - 460/3/603 - 230/1/607 - 575/3/604 - 208/3/60Z - SpecialNote: Supply Voltage [SV] 2-7 include field mounted step down transformer.12 - Motor Type [MT]1 - Open Drip Proof (Standard)2 - Totally Enclosed (Capacities [CA] 060 through 120 only)13 - Development Level [DL]C - Production Onset14, 15 - Accessories [AS]FACTORY INSTALLEDS3 - Stainless Steel Flue CollectorZ1 - SpecialAll Field Installed Accessories are to be entered as a separate line itemusing catalog number which places “11AS” as a prefix. i.e: G3 becomes 11AS-G3.FIELD INSTALLED (AS- )A7 - High Pressure RegulatorA7 - 1/2-1 Regulator for 0.5-10 PSIA7 - 3/8-1 Regulator for 10-20 PSIA7 - 5/16-1 Regulator for 20-35 PSIG1 - 1-Stage Mercury Free Thermostat (Round)G2 - 1-Stage Mercury Free Thermostat w/Guard KitG3 - 1-Stage Mercury Free Thermostat/Fan SwitchG5 - 2-Stage Mercury Free Thermostat w/Fan SwitchG6 - Locking Thermostat CoverG9 - 1-Stage Mercury Free Heating Only ThermostatGW - WiFi Thermostat TH8321WF1001/UP5 - 24V SPST Relay-Specify PurposeT1 - Quick Swivel Mounting BracketVC-4 - 4 inch Vent CapX2 - 30 Degree Downturn NozzleX3 - 60 Degree Downturn NozzleX4 - 90 Degree Downturn NozzleX7-4 - Combustion Air Inlet Kit (Capacities [CA] 030-075)X7-5 - Combustion Air Inlet Kit (Capacities [CA] 090-120)9
GG Series — Low Profile Unit HeaterPerformance and Dimensional DataUNIT CAPACITY (MBH)PERFORMANCE DATA†Input - BTU/Hr(kW)Output - BTU/Hr(kW)Thermal Efficiency - %Free Air Delivery - CFM(cu. m/s)Air Temperature Rise - F( C)Full Load Amps at 120VMinimum Circuit Ampacity at 120VMOTOR DATA: Motor HPMotor (kW)Motor Type ODP††RPMMotor Amps @ 115VDIMENSIONAL DATA - Inches (mm)“A” Jacket Height“B” Overall Height“C” Overall Depth“D1” Center Line Height of Flue*“D2” Center Line Height of Air Intake“E” Fan Diameter“F” Discharge Opening Height“G” Vent Connection Diameter“H1” Center Line of Flue Connection From Side“H2” Center Line of Air Intake From SideVENT SIZE REQUIREMENTS - STANDARD COMBUSTIONCategory III Horizontal - Inches (mm)Category I & III Vertical - Inches (mm)VENT SIZE REQUIRMENTS - SEPARATED COMBUSTIONExhaust Diameter** - Inches (mm)Intake Air Diameter - Inches (mm)Unit Weight - Lbs(kgs)Shipping Weight - 05(48)115(52)5(127)5(127)110(50)120(54)*For all installations, the flue collar is included with the unit and should be field installed per the instructions included with the unit.**4-5 inch reducer supplied where required.† Ratings shown are for unit installations at elevations between 0 and 2,000 feet (0 to 610m). For unit installations in USA above 2,000 feet (610m), the unit input must be field derated 4% for each1,000 feet (305m) above sea level; refer to local codes, or in absence of local codes, refer to the latest edition of the National Fuel Gas Code, ANSI Standard Z223.1(NFPA No. 54).For installations in Canada, any reference to deration at altitudes in excess of 2,000 feet (610m) are to be ignored. At altitudes of 2,000 feet to 4,500 feet (610 to 1372m), the unit must be fieldderated and be so marked in accordance with the ETL certification. See unit installation, operation and maintenance manual for deration information.†† LEGEND:10ODP OPEN DRIP PROOFSP SHADED POLE
GG Series — Low Profile Unit HeaterDimensional DataDIMENSIONS .XXX STANDARD UNITSDIMENSIONS IN PARENTHESIS (XXX) MILLIMETERS11
XF/XC Series — Tubular Unit HeaterSTANDARD FEATURES Designed for 20-Gaugeeither StandardSteel Jacketor Separatedwith BakedCombustionEnamel Finish In-Shot BurnerDesign 115/1/60Supply Voltage 115/24 VoltControlTransformer Direct SparkIgnition Main ControlPanelOPTIONAL FEATURES Stainless Steel Supply Voltages:Heat Exchanger,208 & 230/1/60Burners and/orand 230, 460,Flue Collector575/3/60 Power Vented RedundantSingle-StageGas Valve IndividuallyAdjustableand RemovableLouvers PremiumEfficiency BlowerMotors in ODPand TE Types Two-Stage andVarious ElectronicModulationGas Controls 115/1/60 VoltMotor withInternalOverloadProtection Discharge Nozzles(30 , 60 & 90 )or Duct FlangeAssemblyUnit Number DescriptionDigitTXXX — 1ItemPrefix56789 10 11 12 13 14 UT CA234FTFMGTALGCSV 10 Year HeatExchanger, FlueCollector andBurner Warranty 82 % ThermalEfficiency Combustion AirInlet Kit (allowsconcentric ventingwith horizontalor verticaltermination)MT MS AS(Internal use Only)1, 2 - Unit Type [UT]XF - Convertible Venting, Tubular PropellerXC - Convertible Venting, Tubular Blower3, 4, 5 - Capacity [CA]100 - 100,000 BTU/HR125 - 125,000 BTU/HR150 - 150,000 BTU/HR175 - 175,000 BTU/HR200 - 200,000 BTU/HR250 - 250,000 BTU/HR300 - 300,000 BTU/HR350 - 350,000 BTU/HR400 - 400,000 BTU/HR6 - Furnace Type [FT]A - Right Side Access7 - Heat Exchanger ConstructionMaterial [FM]1 - Standard (Aluminized) Steel2 - 409 Stainless Steel8 - Gas Type [GT]N - Natural GasP - Propane Gas (LP)9 - Altitude [AL]S - 0–4,999 feetT - 5,000–11,999 feetNote: Installations over 2,000 feet require gasinput deration in the field.Refer to unit installation instructions.10 - Direct Spark Gas Control [GC]1 - Single Stage2 - Two Stage3 - Electronic Modulation w/Room Sensing4 - Electronic Modulation w/Duct Sensing(Blower only)5 - Electronic Modulation w/Duct Sensing& Room Ovrd. Stat (Blower only)6 - E lectronic Modulation w/External 4-20 mAInput7 - Electronic Modulation w/External 0-10 VDCInput11 - Supply Voltage [SV]13 - Blower Motor Sizes [MS]**A - 1/4 HP w/ContactorC - 1/2 HP w/ContactorD - 3/4 HP w/ContactorF - 1 HP w/ContactorG - 1-1/2 HP w/ContactorH - 2 HP w/ContactorJ - 1/4 HPL - 1/2 HPP - 1/2 HP w/Magnetic StarterR - 3/4 HP w/Magnetic StarterS - 1 HP w/Magnetic StarterT - 1-1/2 HP w/Magnetic StarterU - 2 HP w/Magnetic StarterW - 1/4 HP w/Magnetic Starter0 - None/Not Applicable**Notes: 1. All 3-phase units [SV 4, 5, 6, 7] include a contactor as standard.2. All single phase units [SV 1, 2, 3] include a contactor for units equipped with3/4 HP motor or higher [MS D, F, G, H]3. [MS] options J, L only available with [SV] option 1 (115/1/60).1 - 115/1/605 - 230/3/602 - 208
separate control box located on the rear of the unit for ease access to the unit control board. 10-YEAR WARRANTY Sterling HVAC warranties the heat exchanger, flue collector and burners of each unit heater to be free from defects in materials and workmansh
