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INSTALLATION
MANUAL
CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . .4
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
RENEWAL PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
PRODUCT NOMENCLATURE . . . . . . . . . . . . . . . . . . . .6
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . . . . . .53
START-UP (GAS HEAT) . . . . . . . . . . . . . . . . . . . . . . . .53
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . .56
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 installer that personal injury and/or equipment dam-
age may result if installation procedure is not handled
properly.
CAUTION:
READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
GAS/ELECTRIC SINGLE PACKAGE
AIR CONDITIONERS
MODELS: DW-15, -18, -20 & -25
284816-BIM-B-0707
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Table of Contents
Troubleshooting
Related Manuals for York DW-15
Summary of Contents for York DW-15
- Page 1 GENERAL ........4 MODELS: DW-15, -18, -20 & -25 SAFETY CONSIDERATIONS .
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Page 2: Table Of Contents
284816-BIM-B-0707 TABLE OF CONTENTS GENERAL ........AIR BALANCE . - Page 3 284816-BIM-B-0707 MANIFOLD GAS PRESSURE ADJUSTMENT ..54 LIST OF TABLES PILOT CHECKOUT .......55 Tbl.
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Page 4: General
284816-BIM-B-0707 GENERAL UPG Model DW units are either single package air conditions equipped with optional factory installed elec- FIRE OR EXPLOSION HAZARD tric heaters, or single package gas-fired central heating furnaces with cooling unit. Both are designed for out- Failure to follow safety warnings exactly could door installation on a rooftop or slab. -
Page 5: Renewal Parts
284816-BIM-B-0707 RENEWAL PARTS Contact your local UPG Parts Distribution Center for authorized replacement parts. APPROVALS INCORRECT INSTALLATION MAY CREATE A CONDITION WHERE THE OPERATION OF Design certified by CSA as follows: THE PRODUCT COULD CAUSE PERSONAL INJURY OR PROPERTY DAMAGE. •... -
Page 6: Product Nomenclature
284816-BIM-B-0707 PRODUCT NOMENCLATURE 15-25 Ton Model Number Nomenclature D W -20 N30 A T A AA 1 0 1 2 4 A Product Category Product Style D = A/C, Single Pkg., R-22 A = Style A Product Identifier Configuration Options (not required for all units) These four digits will not be assigned until a quote is requested, or an order placed. -
Page 7: Installation
284816-BIM-B-0707 INSTALLATION LIMITATIONS These units must be installed in accordance with the INSTALLATION SAFETY INFORMATION: following national and local safety codes: Read these instructions before continuing this appli- In U.S.A.: ance installation. This is an outdoor combination heat- ing and cooling unit. The installer must assure that •... -
Page 8: Location
284816-BIM-B-0707 TABLE 1: UNIT APPLICATION DATA UNIT MODEL NUMBER DW-15 DW-18 DW-20 DW-25 208/230-3-60 187/253 Voltage Varation, 460-3-60 414/506 Min./Max.1 575-3-60 518/630 Supply Air CFM, Min./Max. 4,500/7,000 6,000/8,750 6,000/9,400 7,500/12,500 Wet bulb Temperature (°F) of Air on Evaporator Coil, 57/72 Min./Max. -
Page 9: Rigging And Handling
284816-BIM-B-0707 RIGGING AND HANDLING Exercise care when moving the unit. Do not remove any packaging until the unit is near the place of installa- tion. Rig the unit by attaching chain or cable slings to the round lifting holes provided in the base rails. Spreaders, whose length exceeds the largest dimen- sion across the unit, MUST BE USED. -
Page 10: Ductwork
284816-BIM-B-0707 FIXED OUTDOOR AIR INTAKE DAMPER This damper is shipped inside the return air compart- ment. It is completely assembled and ready for installa- Do not permit overhanging structures or shrubs tion. A damper baffle inside of the hood is adjustable to to obstruct outdoor air discharge outlet, com- provide variable amounts of outdoor air intake on units bustion air inlet or vent outlets. -
Page 11: Condensate Drain
284816-BIM-B-0707 COMPRESSORS Units are shipped with compressor mountings factory- adjusted and ready for operation. Do not loosen compressor mounting bolts. FILTERS Two-inch filters are supplied with each unit, but units can be converted easily to four-inch filters. Filters must always be installed ahead of the evaporator coil and must be kept clean or replaced with same size and type. -
Page 12: Typical Field Wiring
284816-BIM-B-0707 T H E R M O S T A T T E R M I N A L S UNIT CONTROL R C BOARD R H Y 1 Y 1 Y 2... -
Page 13: Thermostat
284816-BIM-B-0707 THERMOSTAT must be of the type shown on the wiring diagram and the same minimum gauge as the replaced wire. The room thermostat should be located on an inside wall approximately 56 inches above the floor where it Electrical line must be sized properly to carry the load. will not be subject to drafts, sun exposure or heat from Use copper conductors only. -
Page 14: Optional Gas Heat
284816-BIM-B-0707 TABLE 3: ELECTRIC HEAT APPLICATION DATA NOMINAL VOLTAGE MINIMUM CFM UNIT SIZE HEATER SIZE 3-PHASE, 15 TON 17.5 TON 20 TON 25 TON (KW) 60 HZ 208/230,460,575 4500 208/230,460,575 4500 208/230 5000 6000 6000 7500 460,575 4500 208/230 5000 460,575 4500 OPTIONAL GAS HEAT... -
Page 15: Gas Connection
284816-BIM-B-0707 GAS CONNECTION 4. All piping should be cleaned of dirt and scale by hammering on the outside of the pipe and blowing The gas supply line can be routed through the knock- out the loose dirt and scale. Before initial start-up, outs located on the front of the unit or through the be sure that all of the gas lines external to the unit opening provided in the unit's base. -
Page 16: L.p. Units, Tanks And Piping
284816-BIM-B-0707 3. The pressure drop in the lines between regulators and between the second stage regulator and the appliance. Pipe size required will depend on the length of the pipe run and the total load of all appli- ances. Complete information regarding tank sizing for vapor- ization, recommended regulator settings, and pipe siz- ing is available from most regulator manufacturers and L.P./propane gas suppliers. -
Page 17: Optional Economizer/Motorized Damper Rain
284816-BIM-B-0707 Each vent hood is installed by inserting the top flange of the hood into the slotted opening in the access panel and securing in place. EXTREME CARE MUST BE EXCERCISED IN The products of combustion are discharged horizon- TURNING ALL SETPOINT, MAXIMUM, AND tally through these two screened, hooded vent open- MINIMUM DAMPER POSITIONING ADJUST- ings on the upper gas heat access panel. -
Page 18: Optional Bas-Ready Economizer Power Exhaust Damper Set Point Adjustment
284816-BIM-B-0707 dance with the enthalpy and mixed air sensor inputs. to both the ductwork and to the atmosphere. Connect When the AQ signal exceeds it's setpoint setting and the tubing from the 'HIGH' pressure tap of the trans- there is no call for free cooling, the actuator is propor- ducer to a static pressure tap (field supplied) in the tionately modulated from the 2 to 10 Vdc signal, with 2 supply duct located at a point where constant pressure... -
Page 19: Factory-Installed Vfd
284816-BIM-B-0707 • RH - a 0-10 VDC analog input provided by a field- Either of the set points described above can be NOTE: installed return air relative humidity sensor for dual changed through the unit control board (UCB) enthalpy economizer configuration (used with OH). with the use of a USB-to-RS485 converter, •... -
Page 20: Bas-Ready Vfd
284816-BIM-B-0707 If a drive failure occurs, the unit does not automatically Once the appropriate relay and capacitor are obtained, switch to bypass mode. The LINE/DRIVE/TEST switch install the capacitor across LR terminals '3' & '4' and must be manually switched to the LINE (BYPASS) make the following wiring connections: position. -
Page 21: Optional Hot Gas Bypass (Hgbp)
284816-BIM-B-0707 nal, must be field wired to the building's VAV boxes to order to maintain a desired minimum evaporator pres- ensure fully open dampers during heating operation. sure. OPTIONAL HOT GAS BYPASS (HGBP) The opening pressure of the bypass valve is fully adjustable between 0 and 80 psig with a factory-setting To allow for low cooling load operation, a direct-acting, of 60 psig. -
Page 22: Honeywell Economizer Control W7212
284816-BIM-B-0707 Exhaust Air Adjustment Screw Exhaust Air LED Damper Min. Position Screw Indoor Air Quality Max. Adjustment Screw Indoor Air Quality Indoor Air Quality Min. Adjustment Screw Free Cool Free Cooling LED Economizer Enthalpy Set Point Adjustment Screw FIGURE 10 - HONEYWELL ECONOMIZER CONTROL W7212 FIGURE 11 - FOUR AND SIX POINT LOADS Unitary Products Group... -
Page 23: Center Of Gravity
284816-BIM-B-0707 TABLE 6: FOUR AND SIX POINT LOADS Total 4 Point Loads (lbs) Unit Size Shipping Weight -15 Gas 2660 -18 Gas 2928 -20 Gas 2960 -25 Gas 3046 -15 Elec 2460 -18 Elec 2728 -20 Elec 2760 -25 Elec 2846 Total 6 Point Loads (lbs) -
Page 24: Physical Data
284816-BIM-B-0707 TABLE 7: PHYSICAL DATA MODELS DW-15 DW-18 DW-20 DW-25 CENTRIFUGAL BLOWER (Dia. x Wd.) 15x15 18x15 18x15 18x15 EVAPORATOR BLOWER FAN MOTOR HP ROWS DEEP EVAPORATOR FINS PER INCH 13.5 COIL FACE AREA (Sq. Ft.) PROPELLER DIA. (In.) (Each) -
Page 25: Dw Electrical Data Without Powered Convenience Outlet
284816-BIM-B-0707 TABLE 9: DW ELECTRICAL DATA WITHOUT POWERED CONVENIENCE OUTLET COMPRESSORS HEATER OPTION MAX. MIN. FUSE/ MODEL OD FAN CONV BLOWER CIRCUIT (TON- VOLTAGE MOTORS OUTLET BRKR MOTOR AMPACITY MODEL STAGES AMPS NAGE) FLA EACH AMPS EACH EACH SIZE (AMPS) (AMPS) None 74.2... - Page 26 284816-BIM-B-0707 TABLE 9: DW ELECTRICAL DATA WITHOUT POWERED CONVENIENCE OUTLET (CONTINUED) COMPRESSORS HEATER OPTION MAX. MIN. FUSE/ MODEL OD FAN CONV BLOWER CIRCUIT (TON- VOLTAGE MOTORS OUTLET BRKR MOTOR AMPACITY MODEL STAGES AMPS NAGE) FLA EACH AMPS EACH EACH SIZE (AMPS) (AMPS) None...
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Page 27: Dw Electrical Data With Powered Convenience
284816-BIM-B-0707 TABLE 10: DW ELECTRICAL DATA WITH POWERED CONVENIENCE OUTLET COMPRESSORS HEATER OPTION MAX. MIN. FUSE/ MODEL OD FAN CONV BLOWER CIRCUIT (TON- VOLTAGE MOTORS OUTLET BRKR MOTOR AMPACITY MODEL STAGES AMPS NAGE) FLA EACH AMPS EACH EACH SIZE (AMPS) (AMPS) None 84.2... - Page 28 284816-BIM-B-0707 TABLE 10: DW ELECTRICAL DATA WITH POWERED CONVENIENCE OUTLET (CONTINUED) COMPRESSORS HEATER OPTION MAX. MIN. FUSE/ MODEL OD FAN CONV BLOWER CIRCUIT (TON- VOLTAGE MOTORS OUTLET BRKR MOTOR AMPACITY MODEL STAGES AMPS NAGE) FLA EACH AMPS EACH EACH SIZE (AMPS) (AMPS) None...
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Page 29: Front View Dimensions 15, 17.5, 20 & 25 Ton
284816-BIM-B-0707 ECONOMIZER / MOTORIZED DAMPER FIXED OUTDOOR INTAKE AIR AND POWER EXHAUST RAIN HOODS (See detail Y) BLOWER MOTOR ACCESS (Location BLOWER ACCESS BLOWER of Optional VFD Bypass) (Location of COMPARTMENT Optional VFD) ACCESS 180-19/32 COMPRESSOR ACCESS (Auxiliary) DOT PLUG 52-5/8 (For pressure drop reading) -
Page 30: Rear View Dimensions
284816-BIM-B-0707 EVAPORATOR SECTION DOT PLUG (For pressure 40-3/8" drop reading) FILTER ACCESS SUPPLY RETURN COMPRESSOR OUTDOOR ACCESS 40-1/2" SUPPLY AIR 18-5/8" ACCESS 1" NPT FEMALE Dimensions listed are for side 27-3/4" COND. DRAIN CONNECTION 5-1/8" RETURN AIR duct flange openings; see ACCESS OUTDOOR AIR Field Accessories for Side... -
Page 31: Unit Clearances And Rain Hood Dimensions
284816-BIM-B-0707 NOTE: ELEC / ELEC Models: Units and ductwork are CLEARANCES approved for zero clearance to combustible material LOCATION CLEARANCE when equipped with electric heaters. Front 36” 24” (Less Economizer) Rear GAS / ELEC Models: A 1” clearance must be 49”... -
Page 32: Cfm, Static Pressure, And Power - Altitude And Temperature Corrections
284816-BIM-B-0707 CFM, STATIC PRESSURE, AND POWER - ALTI- order to use the indoor blower tables for high altitude applica- tions, certain corrections are necessary. TUDE AND TEMPERATURE CORRECTIONS A centrifugal fan is a "constant volume" device. This means The information below should be used to assist in application that, if the rpm remains constant, the CFM delivered is the of product when being applied at altitudes at or exceeding same regardless of the density of the air. -
Page 33: Altitude/Temperature Conversion Factor
284816-BIM-B-0707 ltitude/Temperature Conversion Factor SEA LEVEL TEMPER TURE (°F) FIGURE 16 - ALTITUDE/TEMPERATURE CONVERSION FACTOR Unitary Products Group... -
Page 34: Supply Air Blower Performance (15 Ton) - Cooling Only 180 Mbh - Bottom Duct Connections
284816-BIM-B-0707 TABLE 12: SUPPLY AIR BLOWER PERFORMANCE (15 TON) - COOLING ONLY 180 MBH - BOTTOM DUCT CONNECTIONS MOTOR BLOWER PULLEY 4500 5250 6000 6750 7200 SPEED, (TURNS (RPM) OPEN)* 208 VOLT AND STANDARD DRIVE 6.0** 4.8. 1010 1040 208 VOLT AND HIGH STATIC DRIVE 1025 1065 1095... -
Page 35: Supply Air Blower Performance (17.5 Ton) - Cooling Only 210 Mbh - Bottom Duct Connections
284816-BIM-B-0707 TABLE 13: SUPPLY AIR BLOWER PERFORMANCE (17.5 TON) - COOLING ONLY 210 MBH - BOTTOM DUCT CONNECTIONS MOTOR BLOWER PULLEY 6000 7000 8000 9000 SPEED, (TURNS (RPM) OPEN)* 208 VOLT AND STANDARD DRIVE 6.0** 1015 208 VOLT AND HIGH STATIC DRIVE 1010 1020 1035... -
Page 36: Supply Air Blower Performance (20 Ton) - Cooling Only 240 Mbh - Bottom Duct Connections
284816-BIM-B-0707 TABLE 14: SUPPLY AIR BLOWER PERFORMANCE (20 TON) - COOLING ONLY 240 MBH - BOTTOM DUCT CONNECTIONS MOTOR BLOWER PULLEY 6000 7000 8000 9000 9400 SPEED, (TURNS (RPM) OPEN)* 208 VOLT AND STANDARD DRIVE 6.0** 1015 208 VOLT AND HIGH STATIC DRIVE 1010 1020 1035... -
Page 37: Supply Air Blower Performance (15 Ton) - Gas Heat 180 Mbh - Bottom Duct Connections
284816-BIM-B-0707 TABLE 15: SUPPLY AIR BLOWER PERFORMANCE (15 TON) - GAS HEAT 180 MBH - BOTTOM DUCT CONNECTIONS MOTOR BLOWER PULLEY 4500 5250 6000 6750 7200 SPEED, (TURNS (RPM) OPEN)* 208 VOLT AND STANDARD DRIVE 6.0** 1010 1040 208 VOLT AND HIGH STATIC DRIVE 1025 1065 1125... -
Page 38: Supply Air Blower Performance (17.5 Ton) - Gas Heat 210 Mbh - Bottom Duct Connections
284816-BIM-B-0707 TABLE 16: SUPPLY AIR BLOWER PERFORMANCE (17.5 TON) - GAS HEAT 210 MBH - BOTTOM DUCT CONNECTIONS MOTOR BLOWER PULLEY 6000 7000 8000 9000 SPEED, (TURNS (RPM) OPEN)* 208 VOLT AND STANDARD DRIVE 6.0** 1015 208 VOLT AND HIGH STATIC DRIVE 1025 1050 1065... -
Page 39: Supply Air Blower Performance (20 Ton) - Gas Heat 240 Mbh - Bottom Duct Connections
284816-BIM-B-0707 TABLE 17: SUPPLY AIR BLOWER PERFORMANCE (20 TON) - GAS HEAT 240 MBH - BOTTOM DUCT CONNECTIONS MOTOR BLOWER PULLEY 6000 7000 8000 9000 9400 SPEED, (TURNS (RPM) OPEN)* 208 VOLT AND STANDARD DRIVE 6.0** 1015 208 VOLT AND HIGH STATIC DRIVE 1025 1050 1065... -
Page 40: Supply Air Blower Performance (25 Ton) - Gas Heat 300 Mbh - Bottom Duct Connections
284816-BIM-B-0707 TABLE 18: SUPPLY AIR BLOWER PERFORMANCE (25 TON) - GAS HEAT 300 MBH - BOTTOM DUCT CONNECTIONS MOTOR BLOWER PULLEY 7500 8750 10000 11250 12500 SPEED, (TURNS (RPM) OPEN)* 208 VOLT AND STANDARD DRIVE 1005 1040 1070 10.2 1100 10.6 1135 11.1... -
Page 41: Static Resistances
284816-BIM-B-0707 TABLE 19: STATIC RESISTANCES RESISTANCE, IWG DESCRIPTION 15 TON 17.5 TON 20 TON 25 TON 4500 6000 7200 6000 7500 9000 6000 8000 9400 7500 10000 12500 WET INDOOR COIL 18 KW 36 KW ELECTRIC HEAT OPTIONS 54 KW 72 KW ECONOMIZER OPTION HORIZONTAL DUCT CONNECTIONS... -
Page 42: Charging Chart - 15 Ton
284816-BIM-B-0707 15 Ton Charging Chart Outdoor Temp º 105º 95º 85º 75º Suction Pressure (psi) 1. Make sure that both condenser fans are running w hen charging. One fan may sw itch off at low er ambient temperatures making the chart above inaccurate. 2. -
Page 43: Charging Chart - 20 Ton
284816-BIM-B-0707 20 Ton Charging Chart Outdoor Temp (ºF) 115º 105º 95º 85º 75º 65º Suction Pressure (psi) 1. Make sure that both condenser fans are running when charging. One fan may switch off at lower ambient temperatures making the chart above inaccurate. 2. -
Page 44: Phasing
284816-BIM-B-0707 PHASING UPG MODEL DW, units are properly phased at the fac- tory. Check for proper compressor rotation. If the blower or compressors rotate in the wrong direction at start-up, the electrical connection to the unit is mis- phased. Change the incoming line connection phasing to obtain proper rotation. -
Page 45: Operation
284816-BIM-B-0707 2. Insert at least 8" of 1/4 inch tubing into each of OPERATION these holes for sufficient penetration into the air flow on both sides of the indoor coil. SEQUENCE OF OPERATIONS OVERVIEW The tubes must be inserted and held in a posi- NOTE: For these units, the thermostat makes a circuit tion perpendicular to the air flow so that veloc-... -
Page 46: No Outdoor Air Options
284816-BIM-B-0707 mizer. The dampers will modulate to maintain a constant supply air temperature as monitored by the discharge air sensor. If the outdoor air enthalpy is above the setpoint, "Y1" energizes compressor #1, condenser fan motor #1, If the unit is operated with the manual bypass and condenser fan motor #2 (if the ambient temperature switch in the LINE (BYPASS) position and is above 60°F). -
Page 47: Economizer With Optional Vav Blower With Power Exhaust
284816-BIM-B-0707 outside air dampers will be closed. When the supply delay for cooling, and the economizer outdoor damper fan is powered and there is no Y1 call, or if free-cooling will close. is unavailable, the control opens the economizer ECONOMIZER WITH OPTIONAL VAV BLOWER WITH dampers to the minimum position setting. -
Page 48: Low-Pressure Limit Switch
284816-BIM-B-0707 LOW-PRESSURE LIMIT SWITCH will begin immediately following the elapse of the mini- mum run time. The low-pressure limit switch is not monitored during the initial 30 seconds of a cooling system's operation. When operating in low ambient mode, the UCB will not For the following 30 seconds, the UCB will monitor the lockout the compressors due to a freezestat trip. -
Page 49: Reset
284816-BIM-B-0707 RESET The thermostat will cycle the electric heat to satisfy the heating requirements of the conditioned space. Remove the call for cooling, by raising thermostat set- All 240 & 480V heaters are provided with man- NOTE: ting higher than the conditioned space temperature. ual reset backup protection limits. -
Page 50: Flash Codes
284816-BIM-B-0707 GAS HEATING SEQUENCE OF OPERATIONS TABLE 22: LIMIT CONTROL SETTING The following sequence describes the operation of the TEMPERATURE LIMIT TEMPERATURE LIMIT UNIT HEATER gas heat section. SWITCH 1, 2 SWITCH 3, 4, 5, 6 VOLTAGE (Tons) OPENS, OPENS, For units with VFD and gas heat, the speed of 17.5, 20, the indoor blower motor continues to be con-... -
Page 51: Gas Heating Operation Errors
284816-BIM-B-0707 gized. The "RW2-1" contact is closed energizing the blower is de-energized after the fan off delay for heat- second stage ignition module "IC2". "IC2" will immedi- ing has elapsed. The draft motor performs a 25-second ately start the second stage igniter sparking and will post purge. -
Page 52: Flash Codes
284816-BIM-B-0707 down the ignition control and closing the main gas limit has not functioned correctly. Replace the pri- valves and energizing the blower. mary limit. 2. Centrifugal Switch (CS). TABLE 24: LIMIT CONTROL SETTING Capacity, MBH Units Limit Control If the draft motor should fail, the centrifugal switch (Tons) Opens, ºF Input... -
Page 53: Start-Up (Cooling)
284816-BIM-B-0707 POST START CHECK LIST TABLE 25: GAS HEAT ANTICIPATOR SETPOINTS Anticipator Setpoint 1. Verify proper system pressures for both circuits. Gas Valve 1st Stage 2nd Stage 2. Measure the temperature drop across the evapora- Honeywell VR8440 0.30 amp 0.11 amp tor coil. -
Page 54: To Shut Down
284816-BIM-B-0707 TO SHUT DOWN: 1. Turn “off” electric power to unit. 2. Depress knob of gas valve while turning to “off” position, or turn gas valve switch to “off” position. POST-START CHECK LIST (GAS) After the entire control circuit has been energized and the heating section is operating, make the following checks: FIGURE 25 - TYPICAL GAS VALVES... -
Page 55: Pilot Checkout
284816-BIM-B-0707 PILOT CHECKOUT CHECKING GAS INPUT The pilot flame should envelope the end of the flame NATURAL GAS sensor. To adjust pilot flame, (1) remove pilot adjust- 1. Turn off all other gas appliances connected to the ment cover screw, (2) increase or decrease the clear- gas meter. -
Page 56: Adjustment Of Temperature Rise
284816-BIM-B-0707 ADJUSTMENT OF TEMPERATURE RISE The temperature rise (or temperature difference between the return air and the heated air from the fur- Label all wires prior to disconnection when ser- nace) must lie within the range shown on the rating vicing controls. - Page 57 284816-BIM-B-0707 display (refer to the drive user manual for full loose wiring between the contactor and the com- descriptions, if necessary). Clear any fault by pressor. pressing 'RESET' on the drive's keypad and take any corrective action as needed. If the motor still 3.
- Page 58 284816-BIM-B-0707 10. If 24 volts is present at the UCB Y1 terminal and For units without factory installed or with field none of the switches are open and the compressor installed economizers, the UCB allows compressor is not locked out, the UCB may have the compres- operation all the time.
- Page 59 284816-BIM-B-0707 check for loose wiring between C2 and the com- pressor contactor. For units without factory installed or with field installed economizers, the UCB allows compressor 7. If 24 volts is not present at the C2 terminal, check operation all the time. This programming can be for 24 volts from the room thermostat at the UCB checked or changed by the local distributor.
- Page 60 284816-BIM-B-0707 Y1 terminal, the UCB may have faulted. Check for 12. For units without economizers: If 24 volts is present 24 volts at the Y1 ECON terminal. If 24 volts is not at the Y1 “OUT” terminal, check for 24 volts at the present at Y1 “ECON”, the UCB has faulted.
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Page 61: Gas Heat Troubleshooting Guide
284816-BIM-B-0707 GAS HEAT TROUBLESHOOTING GUIDE On calls for heating, the draft motor operates and the furnace lights but the supply air blower motor does not energize after a short delay (the room thermostat fan switch is in “AUTO” position). 1. Place the thermostat fan switch in the “ON” posi- Troubleshooting of components may require tion. - Page 62 284816-BIM-B-0707 proper operation of the room thermostat (contact 1. The ignition control (IC1, IC2) may be locked out between R and G with the fan switch in the “ON” due to either a flame roll out or 100% shut off. position and in the “AUTO”...
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Page 63: Unit Control Board Flash Codes
284816-BIM-B-0707 The draft motor runs and the ignitor sparks at the pilot Check the high tension wire for good electrical con- burner but the pilot does not ignite and a gas odor is nection. If all are intact, replace the ignitor module. not detected at the draft motor outlet. -
Page 64: Unit Control Board Flash Codes
284816-BIM-B-0707 each alarm flash code by approximately 2 seconds. In shooting. To reset all ASCDs for one cycle, press and all cases, a flashing Green LED will be used to indicate release the UCB TEST/ RESET button once. non-alarm condition. Flash codes that do and do not represent alarms are In some cases, it may be necessary to "zero"... -
Page 65: Unit Control Board Option Setup
284816-BIM-B-0707 Check Alarm History Reset All ASCDs for One Cycle Non Alarm Condition Green LED Flashing Current Alarm Flashed Red LED FIGURE 28 - UNIT CONTROL BOARD UNIT CONTROL BOARD OPTION SETUP mode. When saving, the control board only saves the parameters for the currently dis- played mode (Option Byte or Heat Delay). -
Page 66: Optional Vav Control Board Flash Codes
284816-BIM-B-0707 While in either Setup mode, if no buttons are Optional VAV Control Board Flash Codes NOTE: pushed for 60 seconds, the display will revert Flash codes are also utilized by the VAV add-on board to aid to its normal display, exiting the Option Setup in troubleshooting optional VAV applications. - Page 67 284816-BIM-B-0707 Unitary Products Group...
- Page 68 Subject to change without notice. Printed in U.S.A. 284816-BIM-B-0707 Copyright © 2007 by Unitary Products Group. All rights reserved. Supersedes: 284816-BIM-A-0107 Unitary 5005 Norman Products York Group Drive 73069...