K-Series (7.5-12.5 KGA) Installation Instructions - Allied Commercial

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OUTSIDE OF UNIT GAS PIPE CONNECTIONGROUNDJOINT UNIONTO GASVALVEALL ELBOWS ARE 3/4"10" NIPPLEGROMMETBOTTOM GAS ENTRYTHROUGH THE UNITMULLION BETWEENHEAT AND COMPRES-SOR SECTIONSGROMMET7−1/2" NIPPLE5" NIPPLE4" NIPPLE4" NIPPLETO GASSUPPLY7"NIPPLETO GASSUPPLYTO GASVALVEGROUNDJOINT UNION4" NIPPLEGAS PIPINGSUPPORTMANUAL MAINSHUT−OFF VALVEDRIP LEG(REFER TOLOCAL CODES)ALTERNATEKNOCKOUTSROOF MOUNTINGFRAMEDRIP LEGMANUAL MAINSHUT−OFF VALVE3−1/2" NIPPLEFIGURE 83" NIPPLEFIGURE 10BOTTOM ENTRY GAS PIPINGTHROUGH THE CURBMULLION BETWEENHEAT AND COMPRES-SOR SECTIONS4" NIPPLETO GASVALVE4" NIPPLEPressure Test Gas Piping (Gas Units)When pressure testing gas lines, the gas valve mustbe disconnected and isolated. Gas valves can bedamaged if subjected to more than 0.5 psig (3.48kPa).See figure 11.GROMMETALL ELBOWS ARE 3/4"MANUAL MAINSHUT−OFF VALVETO GASSUPPLYROOFMOUNTINGFRAME10" NIPPLEFIGURE 95" NIPPLE7−1/2" NIPPLEGROUNDJOINT UNION4" NIPPLE3−1/2" NIPPLE3" NIPPLEDRIP LEGPage 8NOTE−Codes may require that manual main shut−offvalve and union (furnished by installer) be installed ingas line external to unit. Union must be of the groundjoint type.After all connections have been made, check all pipingconnections for gas leaks. Also check existing unit gasconnections up to the gas valve; loosening may occurduring installation. Use a leak detection solution or otherpreferred means. Do not use matches candles or othersources of ignition to check for gas leaks.CAUTIONSome soaps used for leak detection are corrosiveto certain metals. Carefully rinse piping thoroughlyafter leak test has been completed. Do not usematches, candles, flame or othe sources of ignitionto check for gas leaks.
WARNINGDanger of explosion. Can cause injuryor product or property damage. Do notuse matches, candles, flame or othersources of ignition to check for leaks.NOTE−In case emergency shut down is required, turn offthe main manual shut−off valve and disconnect mainpower to unit. These devices should be properly labeledby the installer.PRESSURE TEST GAS LINERefer to unit nameplate for minimum circuit ampacityand maximum fuse size.1− 230/460/575 volt units are factory wired. For 208Vsupply, disconnect the pink wire (230V) at all controlpower transformer(s). Reconnect the pink wire(208V). Tape the exposed end of the 230V pink wire.2− Route power through the bottom power entry areaand connect to L1, L2, and L3 on the bottom of TB2in control box for gas units or units equipped withelectric heat. Route power to F4 on cooling onlyunits (no electric heat). Route power to S48disconnect switch when the option isfactory−installed. See unit wiring diagram.3− Connect separate 120v wiring to optional GFCI outletpigtails.MANUAL MAINSHUT−OFF VALVEGAS VALVEFIGURE 11CAPA−Thermostat LocationCONTROL WIRINGRoom thermostat mounts vertically on a standard 2" X 4"handy box or on any non−conductive flat surface.Locate thermostat approximately 5 feet (1524mm)above the floor in an area with good air circulation ataverage temperature. Avoid locating the roomthermostat where it might be affected by:−drafts or dead spots behind doors and in corners−hot or cold air from ducts−radiant heat from sun or appliances−concealed pipes and chimneysHigh Altitude DerateLocate the high altitude conversion sticker in the unitliterature bag. Fill out the conversion sticker and affix nextto the unit nameplate.Refer to table 1 for high altitude adjustments.TABLE 1HIGH ALTITUDE DERATEAltitude Ft.*Gas Manifold Pressure2000−4500See Unit Nameplate4500 And Above Derate 2% / 1000 Ft. Above Sea Level*Units installed at 0−2000 feet do not need to be modified.NOTE - This is the only permissible derate for these units.Electrical ConnectionsPOWER SUPPLYDo not apply power or close disconnect switch untilinstallation is complete. Refer to start−up directions.Refer closely to unit wiring diagram.Page 9B−Control Wiring1− Route thermostat cable or wires from subbase tocontrol box (refer to unit dimensions to locate bottomand side power entry).IMPORTANT − Unless field thermostat wires are rated formaximum unit voltage, they must be routed away fromline voltage wiring. Use wire ties located near the lowerleft corner of the controls hat section to securethermostat cable.Use18 AWG wire for all applications using remotelyinstalled electro−mechanical and electronicthermostats.2− Install thermostat assembly in accordance withinstructions provided with thermostat.3− Connect thermostat wiring to TB1 terminal board onthe lower side of the controls hat section. Wire asshown in figure 12 for electro−mechanical andelectronic thermostats. If using other temperaturecontrol devices or energy management systems seeinstructions and wiring diagram provided bymanufacturer.
Page 2: KGA/KCA092, 102, 120, & 150 DIMENSI
Page 6 and 7: 4− Place field-provided H-style p
Page 10 and 11: 24 VOLT FIELD WIRING WITH ELECTRONI
Page 12 and 13: LOCATION OF STATIC PRESSURE READING
Page 14 and 15: BLOWER DATA120 BELT DRIVE BLOWER
Page 16 and 17: BLOWER DATAFACTORY INSTALLED BELT D
Page 18 and 19: 6− If discharge pressure is high,
Page 20 and 21: 2− Combustion air pressure switch
Page 22 and 23: ServiceThe unit should be inspected
Page 24: Clean combustion air inducer as fol

K-Series (7.5-12.5 KGA) Installation Instructions - Allied Commercial

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