York SUNLINE MagnaDRY DR240 Installation Manual
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York SUNLINE MagnaDRY DR240 Installation Manual

Gas/electric single package air conditioners
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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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . . . . . .63
START-UP (GAS HEAT) . . . . . . . . . . . . . . . . . . . . . . . .64
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . .66
See the following pages 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
SUNLINE MagnaDRY™
GAS/ELECTRIC SINGLE PACKAGE
AIR CONDITIONERS
MODELS: DR180, 240 & 300
284811-YIM-C-1008

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Summary of Contents for York SUNLINE MagnaDRY DR240

  • Page 1 INSTALLATION SUNLINE MagnaDRY™ MANUAL GAS/ELECTRIC SINGLE PACKAGE AIR CONDITIONERS CONTENTS MODELS: DR180, 240 & 300 GENERAL ........4 SAFETY CONSIDERATIONS .

  • Page 2: Table Of Contents

    284811-YIM-C-1008 TABLE OF CONTENTS GENERAL ........ECONOMIZER (SINGLE OR DUAL ENTHALPY) WITH POWER EXHAUST - .
  • Page 3 284811-YIM-C-1008 LIST OF FIGURES Tbl. # Pg. # 10 DR ELECTRICAL DATA - HIGH STATIC DRIVE MOTOR Fig. # Pg. # W/O POWERED CONVENIENCE OUTLET ..25 TYPICAL RIGGING ......8 11 DR ELECTRICAL DATA - LOW STATIC DRIVE MOTOR CENTER OF GRAVITY .

  • Page 4: General

    284811-YIM-C-1008 GENERAL YORK Model DR units are either single package cool- ing units 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

    284811-YIM-C-1008 RENEWAL PARTS ® Contact your local York Parts Distribution Center for authorized replacement parts. Improper installation may create a condition where the operation of the product could cause APPROVALS personal injury or property damage. Design certified by CSA as follows: The installer should pay particular attention to the •...

  • Page 6: Product Nomenclature

    284811-YIM-C-1008 PRODUCT NOMENCLATURE 15-25 Ton MagnaDRY™ Model Number Nomenclature D R 180 N24 A 2 A AA 1 0 1 2 4 A Product Style Product Category A = Style A D = A/C, Single Pkg., R-22 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

    284811-YIM-C-1008 INSTALLATION In U.S.A.: • National Electrical Code ANSI/NFPA No. 70. INSTALLATION SAFETY INFORMATION: • National Fuel Gas Code Z223.1. Read these instructions before continuing this appli- ance installation. This is an outdoor combination heat- • Gas-Fired Central Furnace Standard ANSI ing and cooling unit.

  • Page 8: Location

    284811-YIM-C-1008 If a unit is to be installed on a roof curb or special frame TABLE 1: UNIT APPLICATION DATA other than a YORK roof curb, gasketing must be UNIT MODEL NUMBER DR180 DR240 DR300 applied to all surfaces that come in contact with the unit underside.

  • Page 9: Clearances

    284811-YIM-C-1008 CLEARANCES Refer to Figures 12 and 13 for information concerning side and bottom supply and return air duct opening All units require certain clearances for proper operation dimensions. and service. Installer must make provisions for ade- quate combustion and ventilation air in accordance NOTE: It is recommended that, in Canada, the outlet with Section 5.3, Air for Combustion and Ventilation of duct be provided with a removable access...

  • Page 10: Condensate Drain

    284811-YIM-C-1008 COMPRESSORS Units are shipped with compressor mountings factory- adjusted and ready for operation. If outdoor air intake will not be required on units with bottom return air applications, the damper assembly should still be mounted on the side return air access panel, per the instructions above, to insure moisture is not drawn into the unit during operation.

  • Page 11: Typical Field Wiring

    284811-YIM-C-1008 THERMOSTAT ( RCB ) TERMINALS REHEAT CONTROL BOARD 208/230-3-60 and 380/415-3-50 units control transformers are factory wired for 230v and 415v TERMINAL BLOCK power supply respectively. Change tap on transformer for 208-3-60 or 380-3-50 operation. DEHUMIDISTAT See unit wiring diagram. TO REMOTE SENSOR 2ET04701324 IF USED Electronic programmable Thermostat 2ET0770010024...

  • Page 12: Thermostat

    284811-YIM-C-1008 THERMOSTAT A fused disconnect switch should be field provided for the unit. The switch must be separate from all other cir- The room thermostat should be located on an inside cuits. Wire entry at knockout openings require conduit wall approximately 56 inches above the floor where it fittings to comply with NEC (in U.S.A.), CEC (in Can- will not be subject to drafts, sun exposure or heat from ada) and/or local codes.

  • Page 13: Optional Gas Heat

    284811-YIM-C-1008 OPTIONAL GAS HEAT TABLE 3: ELECTRIC HEAT APPLICATION DATA These gas-fired heaters have aluminized-steel or NOMINAL VOLTAGE MINIMUM CFM UNIT SIZE optional stainless steel, tubular heat exchangers with HEATER 3-PHASE, 15 TON 20 TON 25 TON spark ignition with proven pilot. SIZE (KW) 60 HZ 208/230,460,575...

  • Page 14: Gas Connection

    284811-YIM-C-1008 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 15: L.p. Units, Tanks And Piping

    284811-YIM-C-1008 2. The proper pressure regulation. (Two-stage regula- tion is recommended from the standpoint of both cost and efficiency.) 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.

  • Page 16: Optional Economizer/Motorized Damper Rain

    284811-YIM-C-1008 hood to the panel. The top flange of this hood slips in OPTIONAL POWER EXHAUST/BAROMETRIC RELIEF DAMPER RAIN HOOD under the top of the access panel opening when install- ing. Refer to Vent and Combustion Air Hood Figure 8. The instructions for the power exhaust/barometric relief damper rain hood can be found in the kit.

  • Page 17: Indoor Air Quality

    284811-YIM-C-1008 power exhaust comes on is determined by the econo- OPTIONAL VARIABLE AIR VOLUME (VAV) mizer damper position (Percent Open). The Exhaust Air Adjustment Screw should be set at the Percent A variable air volume (VAV) option using a variable fre- Open of the economizer damper at which the power quency drive (VFD) is available for applications requir- exhaust is needed.
  • Page 18 284811-YIM-C-1008 A brief description of the VAV board's I/O terminals that Outputs: are used follows: • FAN - a 2-10 VDC analog output signal sent to the Inputs: VFD to modulate the speed of the indoor blower motor. • DUCT PRES - a 0-5 VDC analog input provided by •...

  • Page 19: Factory-Installed Vfd

    284811-YIM-C-1008 FACTORY-INSTALLED VFD The factory-installed VFD is mounted in the Blower Access Compartment above the blower assembly. The drive comes wired from the factory to include both 3- If the unit is operated with the manual bypass phase power and control connections (run permit sig- switch in the LINE (BYPASS) position and there are VAV boxes present in the duct sys- nal, speed reference signal &...

  • Page 20: Vfd-Ready' For Customer-Installation

    284811-YIM-C-1008 Once the appropriate relay and capacitor are obtained, The power leads to the drive (L1, L2, L3) and from the install the capacitor across LR terminals '3' & '4' and motor (T1, T2, T3) along with the respective ground make the following wiring connections: wires are supplied with the unit and need to be con- nected after the drive is installed.

  • Page 21: Enthalpy Setpoint Adjustment

    284811-YIM-C-1008 CONTROL POINT CONTROL APPROX. CURVE (29) (32) (35) (38) (41) (43) AT 50% RH 73 (23) 70 (21) (27) 67 (19) 63 (17) (24) (21) (18) (16) (13) (10) (24) (27) (41) (43) (10) (13) (16) (18) (21) (29) (32) (35) (38)

  • Page 22: Four And Six Point Loads

    284811-YIM-C-1008 TABLE 6: FOUR AND SIX POINT LOADS 4 Point Loads (lbs) Operating Unit Size Weight 180 Gas 2850 240 Gas 3150 1026 1026 300 Gas 3250 1058 1058 180 Elec 2650 240 Elec 2950 300 Elec 3050 6 Point Loads (lbs) Operating Unit Size Weight...

  • Page 23: Physical Data

    284811-YIM-C-1008 TABLE 7: PHYSICAL DATA MODELS DR 180 DR 240 DR 300 CENTRIFUGAL BLOWER (Dia. x Wd.) 15x15 18x15 EVAPORATOR BLOWER FAN MOTOR HP 5/7.5 7.5/10 15.0 ROWS DEEP EVAPORATOR FINS PER INCH 13.5 COIL FACE AREA (Sq. Ft.) 20.52 PROPELLER DIA.

  • Page 24: Dr Electrical Data - Standard Drive Motor W/O Powered Convenience

    284811-YIM-C-1008 TABLE 9: DR ELECTRICAL DATA - STANDARD DRIVE MOTOR W/O POWERED CONVENIENCE OUTLET COMPRESSORS HEATER OPTION MAX. FUSE/ MIN. MODEL OD FAN CONV BLOWER CIRCUIT BRKR (TON- VOLTAGE MOTORS OUTLET MOTOR AMPACITY MODEL STAGES AMPS SIZE NAGE) FLA EACH AMPS EACH EACH...

  • Page 25: Dr Electrical Data - High Static Drive Motor W/O Powered Convenience Outlet

    284811-YIM-C-1008 TABLE 10: DR ELECTRICAL DATA - HIGH STATIC DRIVE MOTOR W/O POWERED CONVENIENCE OUTLET COMPRESSORS HEATER OPTION MAX. FUSE/ MIN. MODEL OD FAN CONV BLOWER CIRCUIT BRKR (TON- VOLTAGE MOTORS OUTLET MOTOR AMPACITY MODEL STAGES AMPS SIZE NAGE) FLA EACH AMPS EACH EACH...

  • Page 26: Dr Electrical Data - Low Static Drive Motor W/O Powered Convenience Outlet

    284811-YIM-C-1008 TABLE 11: DR ELECTRICAL DATA - LOW STATIC DRIVE MOTOR W/O POWERED CONVENIENCE OUTLET COMPRESSORS HEATER OPTION MAX. FUSE/ MIN. MODEL OD FAN CONV BLOWER CIRCUIT BRKR (TON- VOLTAGE MOTORS OUTLET MOTOR AMPACITY MODEL STAGES AMPS SIZE NAGE) FLA EACH AMPS EACH EACH...

  • Page 27: Dr Electrical Data - Standard Drive Motor With Powered Convenience Outlet

    284811-YIM-C-1008 TABLE 12: DR ELECTRICAL DATA - STANDARD DRIVE MOTOR WITH POWERED CONVENIENCE OUTLET COMPRESSORS HEATER OPTION MAX. FUSE/ MIN. MODEL OD FAN CONV BLOWER CIRCUIT BRKR (TON- VOLTAGE MOTORS OUTLET MOTOR AMPACITY MODEL STAGES AMPS SIZE NAGE) FLA EACH AMPS EACH EACH...

  • Page 28: Dr Electrical Data - High Static Drive Motor With Powered Convenience Outlet

    284811-YIM-C-1008 TABLE 13: DR ELECTRICAL DATA - HIGH STATIC DRIVE MOTOR WITH POWERED CONVENIENCE OUTLET COMPRESSORS HEATER OPTION MAX. FUSE/ MIN. MODEL OD FAN CONV BLOWER CIRCUIT BRKR (TON- VOLTAGE MOTORS OUTLET MOTOR MODEL STAGES AMPS AMPACITY SIZE NAGE) FLA EACH AMPS EACH EACH...

  • Page 29: Dr Electrical Data - Low Static Drive Motor With Powered Convenience Outlet

    284811-YIM-C-1008 TABLE 14: DR ELECTRICAL DATA - LOW STATIC DRIVE MOTOR WITH POWERED CONVENIENCE OUTLET COMPRESSORS HEATER OPTION MAX. FUSE/ MIN. MODEL OD FAN CONV BLOWER CIRCUIT BRKR (TON- VOLTAGE MOTORS OUTLET MOTOR AMPACITY MODEL STAGES AMPS SIZE NAGE) FLA EACH AMPS EACH EACH...

  • Page 30: Fig

    284811-YIM-C-1008 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 COMPRESSOR ACCESS 180-19/32 (Auxiliary) DOT PLUG 52-5/8 (For pressure drop reading)
  • Page 31 284811-YIM-C-1008 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 32: Unit Clearances And Rain Hood

    284811-YIM-C-1008 NOTE: ELEC / ELEC Models: Units and ductwork are CLEARANCES approved for zero clearance to combustible material CLEARANCE LOCATION when equipped with electric heaters. 36” Front 24” (Less Economizer) Rear GAS / ELEC Models: A 1” clearance must be 49”...

  • Page 33: Cfm, Static Pressure, And Power - Altitude And Temperature Corrections

    284811-YIM-C-1008 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 34 284811-YIM-C-1008 ltitude/Temperature Conversion Factor SEA LEVEL TEMPER TURE (°F) FIGURE 15 - ALTITUDE/TEMPERATURE CONVERSION FACTOR Johnson Controls Unitary Products...

  • Page 35: Dr180 Blower Performance - 15 Ton Standard Drive (Cooling Only)

    284811-YIM-C-1008 TABLE 16: DR180 BLOWER PERFORMANCE - 15 TON STANDARD DRIVE (COOLING ONLY) DOWNFLOW Available External Static Pressure - IWG ESP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM BHP CFM RPM 6401 925 3.46 4.15 6068 894 3.07 3.68 5741 861 2.69 3.23 5465 829 2.40 2.87 5244 796 2.074 2.49 4981 761 1.874 2.25 5957 927 3.21 3.86 5596 895 2.83 3.40 5280 863 2.44 2.93 4995 829 2.19 2.63 4835 797 1.96...

  • Page 36: Dr180 Blower Performance - 15 Ton High Static Drive (Cooling Only) Downflow

    284811-YIM-C-1008 TABLE 17: DR180 BLOWER PERFORMANCE - 15 TON HIGH STATIC DRIVE (COOLING ONLY) DOWNFLOW Available External Static Pressure - IWG ESP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM BHP CFM RPM 7968 1132 6.06 7.39 7653 1092 5.40 6.59 7273 1054 4.814 5.87 7019 1014 4.262 5.20 6697 975 3.839 4.61 6353 935 3.342 4.01 7613 1133 5.64 6.88 7296 1093 5.09 6.21 6913 1055 4.47 5.46 6640 1015 3.99 4.79 6312 976...

  • Page 37: Dr180 Blower Performance - 15 Ton Standard Drive (Gas Heat) Downflow

    284811-YIM-C-1008 TABLE 18: DR180 BLOWER PERFORMANCE - 15 TON STANDARD DRIVE (GAS HEAT) DOWNFLOW Available External Static Pressure - IWG ESP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM BHP CFM RPM 6273 925 3.25 3.90 5947 894 2.88 3.46 5626 861 2.53 3.03 5356 829 2.25 2.70 5139 796 1.95 2.34 4881 761...

  • Page 38: Dr180 Blower Performance - 15 Ton High Static Drive (Gas Heat) Downflow

    284811-YIM-C-1008 TABLE 19: DR180 BLOWER PERFORMANCE - 15 TON HIGH STATIC DRIVE (GAS HEAT) DOWNFLOW Available External Static Pressure - IWG ESP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM BHP CFM RPM 7809 1132 5.69 6.95 7500 1092 5.08 6.20 7128 1054 4.53 5.52 6879 1014 4.01 4.81 6563 975 3.61...

  • Page 39: Dr240 Blower Performance - 20 Ton Standard Drive (Cooling Only)

    284811-YIM-C-1008 TABLE 20: DR240 BLOWER PERFORMANCE - 20 TON STANDARD DRIVE (COOLING ONLY) DOWNFLOW Available External Static Pressure - IWG ESP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP 8843 978 6.11 7.45 8446 947 5.50 6.71 8080...

  • Page 40: Dr240 Blower Performance - 20 Ton High Static Drive (Cooling Only) Downflow

    284811-YIM-C-1008 TABLE 21: DR240 BLOWER PERFORMANCE - 20 TON HIGH STATIC DRIVE (COOLING ONLY) DOWNFLOW Available External Static Pressure - IWG ESP CFM RPM KW CFM RPM KW CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP 9919 1081 8.49 10.36 9713 1050 7.86 9.59 9412 1019 7.13 8.70 9100 987 6.46 7.88 8751 955 5.78 7.05 9512 1082 7.80 9.52...

  • Page 41: Dr240 Blower Performance - 20 Ton Standard Drive (Gas Heat) Downflow

    284811-YIM-C-1008 TABLE 22: DR240 BLOWER PERFORMANCE - 20 TON STANDARD DRIVE (GAS HEAT) DOWNFLOW Available External Static Pressure - IWG ESP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP 0.4 9161 1010 6.31 7.69 8666 978 5.74 7.01 8277 947 5.17 6.31 7918...

  • Page 42: Dr240 Blower Performance - 20 Ton High Static Drive (Gas Heat) Downflow

    284811-YIM-C-1008 TABLE 23: DR240 BLOWER PERFORMANCE - 20 TON HIGH STATIC DRIVE (GAS HEAT) DOWNFLOW Available External Static Pressure - IWG ESP CFM RPM KW CFM RPM KW CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP 9721 1081 7.98 9.74 9519 1050 7.39 9.02 9224 1019 6.70 8.18 8918 987 6.07 7.41 8576 955 5.43 6.63...

  • Page 43: Dr300 Blower Performance - 25 Ton Standard Drive (Cooling Only)

    284811-YIM-C-1008 TABLE 24: DR300 BLOWER PERFORMANCE - 25 TON STANDARD DRIVE (COOLING ONLY) DOWNFLOW Available External Static Pressure - IWG ESP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP 0.4 9719 1015 7.28 8.89 9405 980 6.82 8.33 8850 945 5.78 7.06 8479...

  • Page 44: Dr300 Blower Performance - 25 Ton High Static Drive (Cooling Only) Downflow

    284811-YIM-C-1008 TABLE 25: DR300 BLOWER PERFORMANCE - 25 TON HIGH STATIC DRIVE (COOLING ONLY) DOWNFLOW Available External Static Pressure - IWG ESP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP 11413 1180 11.58 14.13 10958 1145 10.67 13.02 10622 1111 9.78 11.93 10464 1077 8.92 10.88 9933 1041 7.77 9.48 0.6 11666 1216 12.46 15.21 11096 1181 11.33 13.82 10595 1146 10.25 12.51 10271 1112 9.11 11.12 10116 1077 8.53 10.40 9599 1042 7.36 8.98 0.8 11364 1216 11.94 14.57 10776 1182 10.80 13.17 10258 1147 9.78 11.94 9928 1113 8.69 10.61 9775 1079 8.08 9.86 9252 1042 7.36 8.98...

  • Page 45: Dr300 Blower Performance - 25 Ton Standard Drive (Gas Heat) Downflow

    284811-YIM-C-1008 TABLE 26: DR300 BLOWER PERFORMANCE - 25 TON STANDARD DRIVE (GAS HEAT) DOWNFLOW Available External Static Pressure - IWG ESP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP 0.4 9525 1015 6.85 8.35 9217 980 6.41 7.83 8673 945 5.44 6.63 8309...

  • Page 46: Dr300 Blower Performance - 25 Ton High Static Drive (Gas Heat) Downflow

    284811-YIM-C-1008 TABLE 27: DR300 BLOWER PERFORMANCE - 25 TON HIGH STATIC DRIVE (GAS HEAT) DOWNFLOW Available External Static Pressure - IWG ESP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP 11185 1180 10.88 13.28 10739 1145 10.03 12.24 10410 1111 9.19 11.22 10255 1077 8.38 10.23 9734 1041 7.30 8.91 0.6 11433 1216 11.71 14.29 10874 1181 10.65 12.99 10383 1146 9.64 11.76 10066 1112 8.56 10.45 9914 1077 8.01 9.78 9407 1042 6.92 8.45 0.8 11137 1216 11.23 13.70 10560 1182 10.15 12.38 10053 1147 9.20 11.22 9729 1113 8.17 9.97 9580 1079 7.60 9.27 9067 1042 6.91 8.44...

  • Page 47: Static Resistances

    284811-YIM-C-1008 TABLE 28: STATIC RESISTANCES RESISTANCE, IWG DESCRIPTION 15 TON 20 TON 25 TON 4500 5600 7500 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 Deduct these resistance values from the available external static pressures shown in the respective Blower Performance Table (See Note 2 for exception.) Since the resistance to air flow will be less for horizontal duct connections than for bottom duct connections, add these pressures to the ESP values...

  • Page 48: Charging Chart - 20 Ton

    284811-YIM-C-1008 DR180 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 49: Charging Chart - 25 Ton

    284811-YIM-C-1008 DR300 Charging Chart Outdoor Temp (ºF) 115º 105º 95º 85º 75º 65º Suction Pressure (psi) Both fans must be running when charging the unit. One fan may switch off at low ambient temperatures making this chart inaccurate. FIGURE 18 - CHARGING CHART - 25 TON Johnson Controls Unitary Products...

  • Page 50: Phasing

    284811-YIM-C-1008 PHASING Note the following: 1. The supply air CFM must be within the limitations Check for proper compressor rotation. If the blower or shown in the Unit Application Data Table 1. compressors rotate in the wrong direction at start-up, the electrical connection to the unit is misphased.

  • Page 51: Air Balance

    284811-YIM-C-1008 AIR BALANCE PRESSURE DROP ACROSS A DRY COIL VS SUPPLY AIR CFM 0.65 DR180 0.55 On VAV units be certain that the VFD drive is set to maximum output, exhaust dampers are 0.45 DR300 closed and individual space damper boxes are 0.35 full open.

  • Page 52: Operation

    284811-YIM-C-1008 OPERATION SEQUENCE OF OPERATIONS OVERVIEW If the unit is operated with the manual bypass For these units, the thermostat makes a circuit switch in the LINE (BYPASS) position and between "R" and "Y1" for the first stage of cooling. there are VAV boxes present in the duct sys- The call is passed to the unit control board (UCB), tem, then boxes must be driven to the full-open...

  • Page 53: Economizer With Dual Enthalpy Sensors

    284811-YIM-C-1008 ers from fully closed to their minimum position. If the ECONOMIZER WITH OPTIONAL VAV OR INTELLI-COM- FORT™ CONTROL enthalpy of the outdoor air is below the setpoint of the enthalpy controller (previously determined), "Y1" ener- The position of the outside air and return air dampers gizes the economizer.

  • Page 54: Economizer With Optional Vav Blower With Power Exhaust

    284811-YIM-C-1008 Once the call for cooling has been satisfied, it will de- HIGH-PRESSURE LIMIT SWITCH energize any compressors and condenser fans, after During cooling operation, if a high-pressure limit switch the minimum compressor run times have been satis- opens, the UCB will de-energize the associated com- fied.

  • Page 55: Low Ambient Cooling

    284811-YIM-C-1008 Should a freezestat open three times within two hours system will be affected by any safety/preventive action. of operation, the UCB will lock-out the associated com- The other refrigerant system will continue in operation pressor and flash a code (Table 36). If the other com- unless it is affected by the fault as well.

  • Page 56: Alternate" Mode

    284811-YIM-C-1008 which engages circuit # 1, resulting in circuit #1 reheat "ALTERNATE” MODE mode operation. When the RCB detects a need for dehumidification (24VAC) at "HUM" via the field supplied dehumidistat When the room thermostat calls for first stage cooling, connected to RHTB-1 and RHTB-2, and there is not a with or without a call for dehumidification, the RCB call for cooling, it energizes the HGR, which energizes...

  • Page 57: Reheat Control Board

    284811-YIM-C-1008 HGRR DEHUMIDISTAT MODE HARNESS SELECTION CONNECTION JUMPER FIGURE 21 - REHEAT CONTROL BOARD Johnson Controls Unitary Products...
  • Page 58 284811-YIM-C-1008 UNIT CONTROL REHEA CONTROL BOARD BOARD HUMIDIFY TERMINAL REHEAT RELAY RHTB REHEAT TERMINAL BLOCK FIGURE 22 - REHEAT CONTROLS - PART 1 REHEAT SOLENOID REHEAT REHEAT SOLENOID SOLENOID UNIT CONTROL BOARD REHEAT CONTROL BOARD FIGURE 23 - REHEAT CONTROLS - PART 2 Johnson Controls Unitary Products...

  • Page 59: Electric Heating Sequence Of Operations

    284811-YIM-C-1008 Check Valve Piping T Condenser Check Valve Air Flow Air Flow Condenser Indoor Blower Coil Refrigerant flow in cooling mode Evaporator Hot Gas Coil Coil Refrigerant flow in reheat mode Open in Bleed Line to clear Suction line Cooling the Hot Gas Coil bleed when it is not in use...

  • Page 60: Heating Operation Errors

    284811-YIM-C-1008 If the second stage of heat is required, heater con- manual reset limit. These limit switches will de- tactor (7M) will be energized. Note that on the 54 energize the heaters should the primary limit fail to KW, 240V heater, heater contactors (7M & 8M) will open or the contactors fail to open in a failure be energized and on the 72 KW, 240V heater, mode.

  • Page 61: Gas Heating Sequence Of Operations

    284811-YIM-C-1008 over tube. Only after the pilot flame has been ignited TABLE 32: ELECTRIC HEAT ANTICIPATOR and the presence of pilot flame detected at the "IC1" by SETPOINTS a signal sent back through the flame sensor is sparking SETTING, AMPS HEATER terminated and the first stage main gas valve opened.

  • Page 62: Gas Heating Operation Errors

    284811-YIM-C-1008 If voltage has been sensed at the GV for at least 15 seconds during the fan on delay for heating and GV voltage or "W1" is lost, the indoor blower is forced on REDUNDANT MAIN VALVE for the length of the fan off delay for heating. VALVE SAFETY CONTROLS GAS MAIN...

  • Page 63: Flash Codes

    284811-YIM-C-1008 5. Rollout Switch. RESETS Remove the call for heating by lowering the thermostat This switch is located above the main burners in setting lower than the conditioned space temperature. the control compartment, which in the event of a This resets any flash codes. sustained main burner rollout shuts off and locks out both ignition controls closing both gas valves.

  • Page 64: Operating Instructions

    284811-YIM-C-1008 OPERATING INSTRUCTIONS 2. Turn room thermostat to lowest setting. 1. Turn unit electrical power on. 3. Turn gas valve knob or switch to “on” position. 2. Set the room thermostat setting to lower than the 4. Turn “on” electric power to unit. room temperature.

  • Page 65: Manifold Gas Pressure Adjustment

    284811-YIM-C-1008 ance for air to the desired level, (3) be sure to replace cover screw after adjustment to prevent possible gas leakage. Put the system into operation and observe through complete cycle to be sure all controls function properly. BURNER INSTRUCTIONS To check or change burners, pilot or orifices, CLOSE MAIN MANUAL SHUT-OFF VALVE AND SHUT OFF ALL ELECTRIC POWER TO THE UNIT.

  • Page 66: Adjustment Of Temperature Rise

    284811-YIM-C-1008 2. With the furnace turned on, measure the time After about 20 minutes of operation, determine the fur- needed for one revolution of the hand on the small- nace temperature rise. Take readings of both the return est dial on the meter. A typical gas meter usually air and the heated air in the ducts (about six feet from has a 1/2 or a 1 cubic foot test dial.
  • Page 67 284811-YIM-C-1008 1. Turn the thermostat fan switch to the ON position. volts are not present from the room thermostat, If the supply air blower motor does not energize, go check for the following: to Step 3. Proper operation of the room thermostat (contact 2.
  • Page 68 284811-YIM-C-1008 4. If M1 is not pulled in, check for 24 volts at the M1 switch trip, repeat trip lock out, or ASCD, the econ- coil. If 24 volts are present and M1 is not pulled in, omizer terminals of the UCB may be improperly replace the contactor.
  • Page 69 284811-YIM-C-1008 16. If none of the above correct the error, replace the Loose wiring from the room thermostat to the UCB. UCB. 8. If 24 volts is present at the UCB Y2 terminal, the On calls for the second stage of cooling, the supply air compressor may be out due to an open high-pres- blower motor and compressor #1 are operating but sure switch, low-pressure switch, or freezestat.
  • Page 70 284811-YIM-C-1008 jump the Y2 to C2 terminals. If the compressor sure switch, low-pressure switch, or freezestat. engages, the UCB has faulted. Check for 24 volts at the HPS1, LPS1, and FS1 terminals of the UCB. If a switch has opened, there 13.

  • Page 71: Gas Heat Troubleshooting Guide

    284811-YIM-C-1008 wiring from the Mate-N-Lock plug to the econo- mizer, back to the Mate-N-Lock plug, and from the Mate-N-Lock plug to the Y1 "ECON" terminal. The economizer control may have faulted and is not Label all wires prior to disconnection when ser- returning the 24 volts to the Y1 "ECON"...
  • Page 72 284811-YIM-C-1008 4. If M3 is not pulled in, check for 24 volts at the M3 On calls for heating, the supply air blower operates but coil. If 24 volts is present at M3 but M3 is not pulled the draft motor does not (the room thermostat fan in, replace the contactor.
  • Page 73 284811-YIM-C-1008 5. 24 volts is found at wire 241, remove the wires The ignitor sparks at the pilot burner but the pilot does attached to the (TDR) and with a VOM, check for not ignite and a gas odor is detected at the draft motor continuity across contacts 1 and 2.

  • Page 74: Unit Control Board Flash Codes

    284811-YIM-C-1008 1. Adjust air shutters as described in “BURNER AIR Alarm condition codes are flashed on the UCB lower SHUTTER ADJUSTMENT” page 65. left Red LED, See Figure 30. While the alarm code is being flashed, it will also be shown by the other LEDs: 2.

  • Page 75: Unit Control Board Option Setup

    284811-YIM-C-1008 Check Alarm History Reset All ASCDs for One Cycle Non Alarm Condition Green LED Flashing Current Alarm Flashed Red LED FIGURE 30 - UNIT CONTROL BOARD • Press the UP or Down button to change the LED status to correspond to the desired Option Setup. UNIT CONTROL BOARD OPTION SETUP •...

  • Page 76: Heat Delay Setup

    Y1 and Humidistat. See alt operation No Power or Control Failure Non-std Non-std Subject to change without notice. Printed in U.S.A. 284811-YIM-C-1008 Copyright © 2008 by Johnson Controls, Inc. All rights reserved. Supersedes: 284811-YIM-B-0707 Johnson Controls Unitary Products 5005 York Drive Norman, OK 73069...

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