Unitary products group SUNLINE ULTRA DH180 Installation Manual Download Page 12

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66369-YIM-D-1004

Unitary Products Group

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Hinged Filter Door & Toolless Access Cabinet

Summary of Contents for SUNLINE ULTRA DH180

Page 1: ...RE 6 INSTALLATION 14 OPERATION 42 START UP COOLING 48 START UP GAS HEAT 49 TROUBLESHOOTING 51 See the following page for a complete Table of Contents NOTES CAUTIONS AND WARNINGS The installer should pay particular attention to the words NOTE CAUTION and WARNING Notes are intended to clarify or make the installation easier Cautions are given to prevent equipment damage Warnings are given to alert i...

Page 2: ...S 33 PHASING 40 CHECKING SUPPLY AIR CFM 40 AIR BALANCE 41 OPERATION 42 SEQUENCE OF OPERATIONS OVERVIEW 42 COOLING SEQUENCE OF OPERATION 42 CONTINUOUS BLOWER 42 INTERMITTENT BLOWER 42 NO OUTDOOR AIR OPTIONS 42 ECONOMIZER WITH SINGLE ENTHALPY SENSOR 42 ECONOMIZER WITH DUAL ENTHALPY SENSORS 43 ECONOMIZER SINGLE OR DUAL WITH POWER EXHAUST 43 MOTORIZED OUTDOOR AIR DAMPERS 43 COOLING OPERATION ERRORS 43...

Page 3: ...NTROLS 48 19 TYPICAL GAS VALVES 49 20 PROPER FLAME ADJUSTMENT 50 21 TYPICAL FLAME APPEARANCE 50 LIST OF TABLES Tbl Pg 1 UNIT APPLICATION DATA 15 2 CONTROL WIRE SIZES 20 3 ELECTRIC HEAT APPLICATION DATA 20 4 GAS HEAT APPLICATION DATA 21 5 PIPE SIZING 21 6 FOUR AND SIX POINT LOADS 27 7 PHYSICAL DATA 28 8 OPERATING WEIGHTS LBS 28 9 DH ELECTRICAL DATA WITHOUT POWERED CONVENIENCE OUTLET 29 10 DH ELECTR...

Page 4: ...ain or service this equipment Observe all precautions in the literature on labels and tags accompanying the equipment whenever working on air conditioning equipment Be sure to follow all other safety precautions that apply Wear safety glasses and work gloves and follow all safety codes Use a quenching cloth and have a fire extinguisher available for all brazing operations INSPECTION As soon as a u...

Page 5: ...combustible material For use with natural gas or propane gas The installer should pay particular attention to the words NOTE CAUTION and WARNING Notes are intended to clarify or make the installation easier Cau tions are given to prevent equipment damage Warn ings are given to alert installer that personal injury and or equipment damage may result if installation proce dure is not handled properly...

Page 6: ...ngle Input Econ R Options 3 4 Gas Heat Options H Std Mtr Drive 4 Filters Single Input Econ Power Exhaust S Option 5 N24 240 MBH Output Aluminized Steel L Std Mtr Drive BAS Ready Econ No BAS Controller w 2 Pleated Filters T Options 1 5 N32 320 MBH Output Aluminized Steel 15 25T Only M Std Mtr Drive BAS Ready Econ No BAS Controller Power Exhaust w 2 Pleated Filters U Options 1 3 5 S24 240 MBH Output...

Page 7: ...S Technicoat Evap Cond Coils Phase Monitor Coil Guard CS CPC Controller DFS APS SS Drain Pan CT CPC Controller DFS APS SS Drain Pan Phase Monitor Coil Guard CU CPC Controller DFS APS SS Drain Pan Technicoat Cond Coils CV CPC Controller DFS APS SS Drain Pan Technicoat Evap Coil CW CPC Controller DFS APS SS Drain Pan Technicoat Evap and Cond Coils CX CPC Controller DFS APS SS Drain Pan Phase Monitor...

Page 8: ...at Cond Coils HV Honeywell Excel 10 Controller DFS APS SS Drain Pan Technicoat Evap Coil HW Honeywell Excel 10 Controller DFS APS SS Drain Pan Technicoat Evap and Cond Coils HX Honeywell Excel 10 Controller DFS APS SS Drain Pan Phase Monitor Coil Guard Technicoat Evap and Cond Coils NA Novar ETC 3 Controller with Dirty Filter Switch Air Proving Switch NB Novar ETC 3 Controller DFS APS Phase Monito...

Page 9: ...troller Technicoat Cond Coil Coil Guard LH Simplicity Intelli Comfort Controller Technicoat Cond Coil Phase Monitor Coil Guard LJ Simplicity Intelli Comfort Controller Technicoat Evap Coil LK Simplicity Intelli Comfort Controller Technicoat Evap Coil Phase Monitor LL Simplicity Intelli Comfort Controller Technicoat Evap Coil Coil Guard LM Simplicity Intelli Comfort Controller Technicoat Evap Coil ...

Page 10: ...lless Access Panels DD CPC Controller DFS APS Phase Monitor Coil Guard Hinged Filter Door Toolless Access Panels DE CPC Controller DFS APS Technicoat Cond Coil Hinged Filter Door Toolless Access Panels DF CPC Controller DFS APS Technicoat Cond Coil Phase Monitor Hinged Filter Door Toolless Access Panels DG CPC Controller DFS APS Technicoat Cond Coil Coil Guard Hinged Filter Door Toolless Access Pa...

Page 11: ... Access Panels GF Honeywell Excel 10 Controller DFS APS Technicoat Cond Coil Phase Monitor Hinged Filter Door Toolless Access Panels GG Honeywell Excel 10 Controller DFS APS Technicoat Cond Coil Coil Guard Hinged Filter Door Toolless Access Panels GH Honeywell Excel 10 Controller DFS APS Technicoat Cond Coil Phase Monitor Coil Guard Hinged Filter Door Toolless Access Panels GJ Honeywell Excel 10 C...

Page 12: ...at Evaporator Coil Coil Guard Dirty Filter Switch Hinged Filter Door Toolless Access Panels UR Technicoat Evaporator Coil Phase Monitor Coil Guard Dirty Filter Switch Hinged Filter Door Toolless Access Panels US Technicoat Evaporator Condenser Coils Hinged Filter Door Toolless Access Panels UT Technicoat Evaporator Condenser Coils Phase Monitor Hinged Filter Door Toolless Access Panels UU Technico...

Page 13: ...nels XG Intelli Comfort w ModLINC Controller Technicoat Cond Coil Coil Guard Hinged Filter Door Toolless Access Panels XH Intelli Comfort w ModLINC Controller Technicoat Cond Coil Phase Monitor Coil Guard Hinged Filter Door Toolless Access XJ Intelli Comfort w ModLINC Controller Technicoat Evap Coil Hinged Filter Door Toolless Access Panels XK Intelli Comfort w ModLINC Controller Technicoat Evap C...

Page 14: ... in accordance with the following national and local safety codes In U S A National Electrical Code ANSI NFPA No 70 National Fuel Gas Code Z223 1 Gas Fired Central Furnace Standard ANSI Z21 47a Local gas utility requirements In Canada Current Canadian Electrical Code C22 1 Current Gas Installation Codes CSA B149 1 Local plumbing and waste water codes Other applicable local codes Refer to the Unit ...

Page 15: ...be installed on a roof curb or special frame other than a York roof curb gasketing must be applied to all surfaces that come in contact with the unit underside TABLE 1 UNIT APPLICATION DATA UNIT MODEL NUMBER DH180 DH240 Voltage Variation Min Max 1 208 230 3 60 187 253 460 3 60 414 506 575 3 60 518 630 Supply Air CFM Min Max 4 500 7 200 6 000 9 400 Wet Bulb Temperature ºF of Air on Evaporator Coil ...

Page 16: ... the National Fuel Gas Code ANSI Z223 1 in U S A or Sections 7 2 7 3 or 7 4 of Gas Installation Codes CSA B149 1 in Canada and or applicable provisions of the local building codes Refer to Dimensions and Clearances Figure 13 for the clearances required for combustible construction servicing and proper unit operation Before lifting a unit make sure that all panels are in place and that its weight i...

Page 17: ...nge surfaces on the hood prior to installing the hood Extend gasketing 1 4 inch beyond the top and bottom of the two side flanges to insure adequate sealing Adjusting the damper to the desired air flow may be done before mounting the hood into position or after installation by removing the front hood panel or the screen on the bottom of the hood Damper baffle in position 1 will allow approximately...

Page 18: ...or replaced with same size and type Dirty filters will reduce the capacity of the unit and will result in frosted coils or safety shut down Minimum filter area and required sizes are shown in Physical Data Table 7 SERVICE ACCESS The following removable panels provide access to all serviceable components Compressor compartment Electric Heat compartment Gas Heat compartment Two panels Side Supply Re...

Page 19: ...tronic programmable Thermostat 2ET0770010024 includes subbase 2 Terminals A1 and A2 provide a relay output to close the outdoor economizer dampers when the thermostat switches to the set back position 24 Volt Transformer 2 TO REMOTE SENSOR 2ET04701324 IF USED O C C W 1 W 2 Y 1 G Y 2 X R S D C R E M O T E M I N P O S W 1 W 2 Y 1 G Y 2 C U N I T C O N T R O L B O A R D T S T A T R H R C ...

Page 20: ...must be of the type shown on the wir ing diagram and the same minimum gauge as the replaced wire Electrical line must be sized properly to carry the load Use copper conductors only Each unit must be wired with a separate branch circuit fed directly from the meter panel and properly fused Refer to the Typical Field Wiring Figure 5 and to the appropriate unit wiring diagram for control circuit and p...

Page 21: ...upply piping arrangements are shown in the figures on Page 22 All shaded items are field supplied If gas supply line is routed through the unit s base ensure that the burner assembly can be removed for maintenance without disturbing the supply line The supply piping and fittings must lie below the bottom gas manifold to avoid interference with the burner assem bly Two grommets are shipped in the b...

Page 22: ... accessible for test gage connection must be installed immediately upstream of the gas supply connection to the fur nace L P UNITS TANKS AND PIPING All gas heat units are shipped from the factory equipped for natural gas use only The unit may be converted in the field for use with L P propane gas with accessory kit model number 1NP0418 All L P propane gas equipment must conform to the safety stand...

Page 23: ... the outside of the gas heat access panel with the screws provided in the bag also attached to the blower housing The screen for the combustion air intake hood is secured to the inside of the access panel opening with four fasteners and the screws used for mounting the hood to the panel The top flange of this hood slips in under the top of the access panel opening when install ing Refer to Vent an...

Page 24: ...g to the lettered curve of the Enthalpy Setpoint Adjustment Figure 9 For a dual enthalpy operation carefully turn the set point adjusting screw fully clockwise past the D setting POWER EXHAUST DAMPER SETPOINT WITH OR WITH OUT POWER EXHAUST With no power exhaust option adjust the Exhaust Air Adjustment Screw fully clockwise This will allow 2nd stage cooling to operate With power exhaust option each...

Page 25: ...66369 YIM D 1004 Unitary Products Group 25 FIGURE 9 ENTHALPY SETPOINT ADJUSTMENT ...

Page 26: ...O SR SR A B C D TR TR1 24 Vac HOT 24 Vac COM EF EF1 2 3 4 5 1 Exhaust Air Adjustment Screw Exhaust Air LED Damper Min Position Screw Indoor Air Quality Max Adjustment Screw Indoor Air Quality LED Indoor Air Quality Min Adjustment Screw Free Cooling LED Economizer Enthalpy Set Point Adjustment Screw FIGURE 11 FOUR AND SIX POINT LOADS A B C D FRONT A E D B F C FRONT ...

Page 27: ... Loads lbs A B C D DH180 Gas 2060 483 525 548 504 DH240 Gas 2206 568 814 888 620 DH180 Elec 2300 539 563 612 586 DH240 Elec 2500 538 563 715 684 Unit Total 6 Point Loads lbs A B C D E F DH180 Gas 2060 322 336 350 365 351 336 DH240 Gas 2206 325 368 412 431 385 339 DH180 Elec 2300 351 367 392 416 399 375 DH240 Elec 2500 334 350 426 502 481 407 FIGURE 12 CENTER OF GRAVITY ...

Page 28: ...q Ft Total 36 0 43 3 COMPRESSOR Qty Per Unit 7 5 Ton Scroll 2 10 Ton Scroll 2 AIR FILTERS Quantity Per Unit 16 X 20 X 2 or 4 4 Quantity Per Unit 16 X 25 X 2 or 4 4 Quantity Per Unit 18 X 24 X 2 or 4 5 Total Face Area sq ft 15 0 20 0 CHARGE Refrigerant 22 lbs oz System 1 23 10 24 2 System 2 21 10 27 2 TABLE 8 OPERATING WEIGHTS LBS MODEL SIZE 15 TON 20 TON BASIC UNIT DH Cooling Only 1900 2100 DH Gas...

Page 29: ...2 6 4 0 0 None 0 0 35 6 45 E18 18 0 1 21 7 35 6 45 E36 36 0 2 43 3 62 1 70 E54 54 0 2 65 0 73 0 80 E72 72 0 2 86 6 94 6 110 575 9 6 73 1 7 5 2 0 0 None 0 0 30 2 35 E18 18 0 1 17 3 30 2 35 E36 36 0 2 34 6 49 8 50 E54 54 0 2 52 0 58 5 70 E72 72 0 2 69 3 75 8 90 20 208 32 1 237 4 5 20 0 0 0 None 0 0 101 2 125 E18 13 5 1 37 5 101 2 125 E36 27 0 2 75 1 118 7 125 E54 40 6 2 112 6 165 9 175 E72 54 1 2 15...

Page 30: ...2 6 4 5 0 None 0 0 40 6 50 E18 18 0 1 21 7 41 3 50 E36 36 0 2 43 3 68 4 70 E54 54 0 2 65 0 79 2 90 E72 72 0 2 86 6 100 9 110 575 9 6 73 1 7 5 2 4 0 None 0 0 34 2 40 E18 18 0 1 17 3 34 2 40 E36 36 0 2 34 6 54 8 60 E54 54 0 2 52 0 63 5 70 E72 72 0 2 69 3 80 8 90 20 208 32 1 237 4 5 20 0 10 0 None 0 0 111 2 125 E18 13 5 1 37 5 111 2 125 E36 27 0 2 75 1 131 2 150 E54 40 6 2 112 6 178 4 200 E72 54 1 2 ...

Page 31: ... OUTDOOR INTAKE AIR AND POWER EXHAUST RAIN HOODS See detail Y FIELD SUPPLIED DISCONNECT SWITCH LOCATION BLOWER ACCESS BLOWER MOTOR ACCESS BLOWER COMPARTMENT ACCESS Auxiliary DOT PLUG For pressure Drop Reading FRONT VIEW CONTROL BOX ACCESS 21 5 9 3 4 11 1 2 2 3 4 21 1 2 33 35 5 7 8 46 5 8 7 1 8 6 3 8 VENT AIR OUTLET HOODS COMBUSTION AIR INLET HOOD GAS HEAT ACCESS C GAS SUPPLY ENTRY 46 5 8 11 1 8 D ...

Page 32: ...side supply and return air compartment pan els For side duct application 1 Replace the side panels on the supply and return air com partments with the accessory flange kit panels 2 Connect ductwork to the duct flanges on the rear of the unit S U P P L Y A I R C O M P A R T M E N T P O W E R E X H A U S T R A I N H O O D o n R e t u r n A i r C o m p a r t m e n t E C O N O M I Z E R M O T O R I Z ...

Page 33: ...static pressure and BHP Since no temperature data is given we will assume an air temperature of 70 F Table 13 shows the correction factor to be 0 832 Corrected static pressure 1 5 x 0 832 1 248 IWC Corrected BHP 4 0 x 0 832 3 328 Example 2 A system located at 5 000 feet of elevation is to deliver 6 000 CFM at a static pressure of 1 5 Use the unit blower tables to select the blower speed and the BH...

Page 34: ...66369 YIM D 1004 34 Unitary Products Group FIGURE 14 ALTITUDE TEMPERATURE CONVERSION FACTOR ...

Page 35: ...9 5 2 4 7 0 7 5 7 5 1 208 VOLT AND HIGH SPEED DRIVE 965 6 0 1 2 2 9 2 6 1 0 3 6 3 2 0 8 4 0 3 6 0 5 4 7 4 2 0 4 5 0 4 4 980 5 5 1 3 3 0 2 7 1 1 3 7 3 3 0 9 4 1 3 7 0 6 4 8 4 3 0 5 5 1 4 6 1025 4 5 1 5 3 2 2 9 1 3 3 9 3 5 1 1 4 5 4 0 0 8 5 1 4 6 0 7 5 6 5 0 1065 3 5 1 6 3 4 3 0 1 4 4 0 3 6 1 2 4 7 4 2 1 0 5 5 4 9 1095 3 0 1 7 3 5 3 1 1 5 4 2 3 8 1 3 4 9 4 4 1 2 5 7 5 1 1130 2 0 1 9 3 7 3 3 1 7 4 5 ...

Page 36: ... 6 3 5 3 0 7 6 9 5 8 0 2 7 3 6 1 1010 4 0 1 8 5 8 4 9 1 7 6 3 5 3 1 5 6 9 5 8 1 0 7 5 6 3 0 5 7 9 6 7 1020 3 5 1 9 6 1 5 1 1 8 6 5 5 5 1 6 7 1 6 0 1 1 7 8 6 6 0 6 8 3 7 0 1035 3 0 2 0 6 2 5 2 1 9 6 8 5 7 1 7 7 4 6 2 1 2 8 1 6 8 0 7 8 6 7 3 1050 2 5 2 1 6 4 5 4 2 0 7 0 5 9 1 8 7 6 6 4 1 3 8 3 7 0 1075 2 0 2 3 6 6 5 5 2 1 7 2 6 0 1 9 7 8 6 6 1 5 8 6 7 2 1100 1 0 2 4 6 7 5 6 2 2 7 3 6 1 2 1 7 9 6 7 2...

Page 37: ...4 1 0 4 4 3 9 0 8 5 0 4 5 0 6 5 6 5 0 208 VOLT AND HIGH SPEED DRIVE 965 6 0 1 2 2 7 2 5 0 9 3 2 2 9 0 6 3 7 3 3 0 4 4 4 3 9 0 2 5 0 4 5 980 5 5 1 3 2 9 2 6 1 0 3 4 3 0 0 7 3 8 3 4 0 5 4 5 4 0 0 3 5 1 4 6 1025 4 5 1 4 3 1 2 8 1 2 3 6 3 2 0 9 4 1 3 7 0 7 4 8 4 3 0 4 5 5 4 9 1065 3 5 1 6 3 4 3 0 1 4 3 9 3 5 1 1 4 5 4 0 0 9 5 1 4 6 1125 2 0 1 9 3 6 3 2 1 7 4 4 3 9 1 4 5 0 4 5 1 2 5 8 5 2 1170 1 0 2 1 ...

Page 38: ... 0 1 9 4 5 3 8 1 5 5 4 4 5 1 0 6 3 5 3 0 4 7 2 6 1 0 1 8 5 7 1 995 4 5 2 1 4 5 3 9 1 6 5 5 4 7 1 1 6 4 5 4 0 5 7 5 6 3 0 2 8 6 7 3 1025 3 5 2 3 4 9 4 1 1 8 5 8 4 9 1 3 6 7 5 7 0 7 8 0 6 7 1050 2 5 2 5 5 1 4 3 2 0 6 1 5 1 1 4 7 1 6 0 0 9 8 4 7 0 1065 2 0 2 6 5 3 4 4 2 1 6 3 5 3 1 5 7 3 6 2 1 0 8 6 7 2 1100 1 0 2 9 5 6 4 7 2 3 6 8 5 7 1 8 7 9 6 6 230 460 575 VOLT AND STANDARD DRIVE 870 6 0 1 3 3 6 3...

Page 39: ...XHAUST PERFORMANCE MOTOR SPEED STATIC RESISTANCE OF RETURN DUCTWORK IWG 0 2 0 3 0 4 0 5 0 6 CFM KW CFM KW CFM KW CFM KW CFM KW HIGH 5250 0 83 4500 0 85 4200 0 88 3750 0 93 3000 0 99 MEDIUM 4900 0 77 3900 0 79 3500 0 82 2900 0 85 LOW 4400 0 72 3700 0 74 3000 0 78 TABLE 20 BLOWER MOTOR AND DRIVE DATA MODEL SIZE DRIVE BLOWER RANGE RPM MOTOR1 ADJUSTABLE MOTOR PULLEY FIXED BLOWER PULLEY BELT NOTCHED HP...

Page 40: ...ion the RPM for the supply air blower and the motor pulley adjustment turns open can be determined from the Blower Per formance Data Tables High speed drive accessories containing a smaller blower pulley and a shorter belt are available for appli cations requiring the supply air blower to produce higher CFM s and or higher static pressures Use Model 1LD0416 for 15 ton units and Model 1LD0417 for 2...

Page 41: ...the air flow so that veloc ity pressure will not affect the static pressure readings 3 Using an inclined manometer determine the pres sure drop across a dry evaporator coil Since the moisture on an evaporator coil may vary greatly measuring the pressure drop across a wet coil under field conditions would be inaccurate To assure a dry coil the compressors should be deac tivated while the test is be...

Page 42: ...er motor When the thermostat calls for the second stage of cool ing the low voltage control circuit from R to Y2 is completed Compressor 2 and condenser fan motor 2 20T only if the ambient temperature is above 60ºF are energized provided it has not been locked out If there is an initial call for both stages of cooling the UCB will delay energizing compressor 2 by 30 sec onds in order to avoid a po...

Page 43: ...nimum run times for compressors HIGH PRESSURE LIMIT SWITCH During cooling operation if a high pressure limit switch opens the UCB will de energize the associated com pressor initiate the ASCD Anti short cycle delay and if the other compressor is idle stop the condenser fans If the call for cooling is still present at the conclu sion of the ASCD the UCB will re energize the halted compressor Should...

Page 44: ...tches are hard soldered to the unit The refrigeration systems are independently mon itored and controlled On any fault only the associated system will be affected by any safety preventive action The other refrigerant system will continue in operation unless it is affected by the fault as well The unit control board monitors the temperature limit switch of electric heat units and the temperature li...

Page 45: ... is set to open at the temperature indi cated in the Limit Control Setting Table 21 It resets automatically The limit switch operates when a high temperature condition caused by inadequate supply air flow occurs thus shutting down the heater and energizing the blower 2 Temperature Limit Switch TLS 3 4 5 and 6 This control is located inside the heater compart ment and is set to open at the temperat...

Page 46: ... energizing the second stage ignition module IC2 IC2 will immedi ately start the second stage igniter sparking and will open the redundant valve located inside the second stage main gas valve GV2 to allow a flow of gas to the second stage carryover tube Only after the pilot flame has been ignited and the presence of pilot flame detected at IC2 by a signal sent back through the flame sensor is spar...

Page 47: ... Setting Table 23 It resets automatically The limit switch operates when a high temperature condition caused by inadequate supply air flow occurs thus shutting down the ignition control and closing the main gas valves and energizing the blower 2 Centrifugal Switch CS If the draft motor should fail the centrifugal switch attached to the shaft of the motor prevents the igni tion controls and gas val...

Page 48: ...eneral informa tion section Check blower drive belt tension 6 Check the unit supply air CFM See CHECKING SUPPLY AIR CFM on Page 40 7 Measure evaporator fan motor s amp draw 8 Set the room thermostat fan switch to off 9 Turn unit electrical power off OPERATING INSTRUCTIONS 1 Turn unit electrical power on 2 Set the room thermostat setting to lower than the room temperature 3 First stage compressors ...

Page 49: ... section is operating make the following checks 1 Check for gas leaks in the unit piping as well as the supply piping 2 Check for correct manifold gas pressures See Checking Gas Input Page 50 3 Check the supply gas pressure It must be within the limits shown on rating nameplate Supply pressure should be checked with all gas appliances in the building at full fire At no time should the standby gas ...

Page 50: ...bly by lifting up and pulling back Burners are now accessible for service Reverse the above procedure to replace the assem blies Make sure that burners are level and seat at the rear of the heat exchanger BURNER AIR SHUTTER ADJUSTMENT Adjust burner shutters so no yellow flame is observed in the heat exchanger tubes CHECKING GAS INPUT NATURAL GAS 1 Turn off all other gas appliances connected to the...

Page 51: ...wer motor does not energize after a short delay the room thermostat fan switch is in the AUTO position 1 Turn the thermostat fan switch to the ON position If the supply air blower motor does not energize go to Step 3 2 If the blower motor runs with the fan switch in the ON position but will not run after the first compres sor has energized when the fan switch is in the AUTO position check the room...

Page 52: ...zed in place of compressor 1 when compressor 1 is requested but locked out 2 If no economizer is installed or the economizer is not opening to provide free cooling and compres sor 1 does not energize on a call for cooling check for line voltage at the compressor contactor M1 and that the contactor is pulled in Check for loose wiring between the contactor and the com pressor 3 If M1 is pulled in an...

Page 53: ...15 If none of the above corrected the error test the integrity of the UCB Disconnect the C1 terminal wire and jumper it to the Y1 terminal DO NOT jump the Y1 to C1 terminals If the compressor engages the UCB has faulted 16 If none of the above correct the error replace the UCB On calls for the second stage of cooling the supply air blower motor and compressor 1 are operating but compressor 2 is no...

Page 54: ... energized in place of compres sor 1 when compressor 1 is unavailable for cool ing calls Check the UCB for alarms indicating that compressor 1 is locked out Press and release the ALARMS button if the LED is not flashing an alarm 2 Check for line voltage at the compressor contactor M1 and that the contactor is pulled in Check for loose wiring between the contactor and the com pressor 3 If M1 is pul...

Page 55: ... 24 volts to the Y1 ECON terminal even though the economizer is not providing free cooling To test the economizer board disconnect the Mate N Locks and jumper between the WHITE and YELLOW wires of the UCB s Mate N Lock plug 13 The UCB can be programmed to lock out compres sor operation during free cooling and in low ambi ent conditions These options are not enabled by default They can be checked b...

Page 56: ...or runs with the fan switch in the ON position but does not run shortly after the fur nace has ignited when the fan switch is in the AUTO position check the room thermostat for contact between R and G during W1 calls On calls for heating the supply air blower operates but the draft motor does not the room thermostat fan switch is in the AUTO position 1 The draft motor has inherent protection If th...

Page 57: ...as is being supplied to the unit Make sure that the gas pressure to the unit is within the proper limits as described in the POST START CHECK LIST Page 49 and that the pilot adjust screw is allowing some flow of gas as described in PILOT CHECKOUT Page 50 2 Check all wiring between the ignitor control and the gas valve Check to make sure the ground connec tions are intact 3 If the wiring is intact ...

Page 58: ...s not used Current alarms are flashed on the UCB LED Pressing and releasing the ALARMS button on the UCB can check the alarm history The UCB will cycle through the last five 5 alarms most recent to oldest separating each alarm flash code by approximately 2 seconds In some cases it may be necessary to zero the ASCD for the compressors in order to perform trouble shooting To reset all ASCDs for one ...

Page 59: ...66369 YIM D 1004 Unitary Products Group 59 ...

Page 60: ...ge without notice Printed in U S A 66369 YIM D 1004 Copyright 2004 by Unitary Products Group All rights reserved Supersedes 66369 YIM C 0504 035 18937 002 C 0504 Unitary 5005 Norman Products York OK Group Drive 73069 ...

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Unitary products group SUNLINE ULTRA DH180, Installation Manual

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