York SUNLINE MagnaDRY WR300 Installation Manual
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York SUNLINE MagnaDRY WR300 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . . . . . .62
START-UP (GAS HEAT) . . . . . . . . . . . . . . . . . . . . . . . .63
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . .65
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: WR180, 240 & 300
284813-YIM-C-1008

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Summary of Contents for York SUNLINE MagnaDRY WR300

  • Page 1 INSTALLATION SUNLINE MagnaDRY™ MANUAL GAS/ELECTRIC SINGLE PACKAGE AIR CONDITIONERS CONTENTS MODELS: WR180, 240 & 300 GENERAL ........4 SAFETY CONSIDERATIONS .

  • Page 2: Table Of Contents

    284813-YIM-C-1008 TABLE OF CONTENTS GENERAL ........4 ECONOMIZER (SINGLE OR DUAL ENTHALPY) WITH POWER EXHAUST - .
  • Page 3 284813-YIM-C-1008 LIST OF FIGURES Fig. # Pg. # FACTOR ........34 Fig.

  • Page 4: General

    284813-YIM-C-1008 GENERAL YORK Model WR 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

    284813-YIM-C-1008 RENEWAL PARTS ® Contact your local York Parts Distribution Center for authorized replacement parts. APPROVALS Improper installation may create a condition where the operation of the product could cause Design certified by CSA as follows: personal injury or property damage.

  • Page 6: Product Nomenclature

    284813-YIM-C-1008 PRODUCT NOMENCLATURE 15-25 Ton Sunline MagnaDRY™ Model Number Nomenclature W R 180 N24 A 2 A AA 1 0 1 2 4 A Product Category Product Style W = A/C, Single Pkg., A = Style A R-22 w/6-Row Evap. Configuration Options (not required for all units) Product Identifier These four digits will not be assigned until a quote is requested, or an order placed.

  • Page 7: Installation

    284813-YIM-C-1008 INSTALLATION • Local gas utility requirements. In Canada: INSTALLATION SAFETY INFORMATION: • Current Canadian Electrical Code C22.1. Read these instructions before continuing this appli- • Current Gas Installation Codes CSA-B149.1. ance installation. This is an outdoor combination heat- ing and cooling unit. The installer must assure that •...

  • Page 8: Location

    FIGURE 2 - CENTER OF GRAVITY If a unit is to 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 CLEARANCES underside.

  • Page 9: Ductwork

    284813-YIM-C-1008 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 10: Condensate Drain

    284813-YIM-C-1008 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 11: Typical Field Wiring

    284813-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 power supply respectively. Change tap on TERMINAL BLOCK transformer for 208-3-60 or 380-3-50 operation. See unit wiring diagram. DEHUMIDISTAT TO REMOTE SENSOR 2ET04701324 IF USED...

  • Page 12: Thermostat

    284813-YIM-C-1008 THERMOSTAT cuits. Wire entry at knockout openings require conduit fittings to comply with NEC (in U.S.A.), CEC (in Can- The room thermostat should be located on an inside ada) and/or local codes. If any of the wire supplied with wall approximately 56 inches above the floor where it the unit must be replaced, replacement wire must be of will not be subject to drafts, sun exposure or heat from...

  • Page 13: Optional Gas Heat

    284813-YIM-C-1008 OPTIONAL GAS HEAT TABLE 3: ELECTRIC HEAT APPLICATION DATA These gas-fired heaters have aluminized-steel or MINIMUM CFM UNIT SIZE NOMINAL VOLTAGE optional stainless steel, tubular heat exchangers with HEATER 3-PHASE, 15 TON 20 TON 25 TON SIZE (KW) 60 HZ spark ignition with proven pilot.

  • Page 14: Gas Connection

    284813-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

    284813-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 Hood

    284813-YIM-C-1008 under the top of the access panel opening when install- OPTIONAL POWER EXHAUST/BAROMETRIC RELIEF DAMPER RAIN HOOD ing. Refer to Vent and Combustion Air Hood Figure 8. Each vent hood is installed by inserting the top flange The instructions for the power exhaust/barometric relief of the hood into the slotted opening in the access panel damper rain hood can be found in the kit.

  • Page 17: Power Exhaust Damper Setpoint

    284813-YIM-C-1008 POWER EXHAUST DAMPER SETPOINT Replace the economizer access panel. With power exhaust option, each building pressuriza- OPTIONAL VARIABLE AIR VOLUME (VAV) tion requirement will be different. The point at which the power exhaust comes on is determined by the econo- A variable air volume (VAV) option using a variable fre- mizer damper position (Percent Open).
  • Page 18 284813-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

    284813-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 switch in the LINE (BYPASS) position and phase power and control connections (run permit sig- there are VAV boxes present in the duct sys- nal, speed reference signal &...

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

    284813-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

    284813-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

    284813-YIM-C-1008 TABLE 6: FOUR AND SIX POINT LOADS 4 Point Loads (lbs) Operating Unit Size Weight WR180 Gas 2900 WR240 Gas 3200 1042 1042 WR300 Gas 3300 1075 1075 WR180 Elec 2700 WR240 Elec 3000 WR300 Elec 3100 1010 1010 6 Point Loads (lbs) Operating Unit Size...

  • Page 23: Physical Data

    284813-YIM-C-1008 TABLE 7: PHYSICAL DATA MODELS WR180 WR240 WR300 CENTRIFUGAL BLOWER (Dia. x Wd.) 15x15 18x15 EVAPORATOR BLOWER FAN MOTOR HP 5/7.5 7.5/10.0/15.0 7.5/15.0 ROWS DEEP EVAPORATOR FINS PER INCH COIL FACE AREA (Sq. Ft.) 20.52 PROPELLER DIA. (In.) (Each) CONDENSER FAN FAN MOTOR HP (Each)

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

    284813-YIM-C-1008 TABLE 9: WR ELECTRICAL DATA - STANDARD DRIVE MOTOR W/O POWERED CONVENIENCE OUTLET COMPRESSORS HEATER OPTION MIN. MAX. FUSE/ MODEL OD FAN CONV BLOWER CIRCUIT BRKR (TON- VOLTAGE MOTORS OUTLET MOTOR AMPACITY SIZE MODEL STAGES AMPS NAGE) FLA EACH AMPS EACH EACH...

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

    284813-YIM-C-1008 TABLE 10: WR ELECTRICAL DATA - HIGH STATIC DRIVE MOTOR W/O POWERED CONVENIENCE OUTLET COMPRESSORS HEATER OPTION MIN. MAX. FUSE/ MODEL OD FAN CONV BLOWER CIRCUIT BRKR (TON- VOLTAGE MOTORS OUTLET MOTOR AMPACITY SIZE MODEL STAGES AMPS NAGE) FLA EACH AMPS EACH EACH...

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

    284813-YIM-C-1008 TABLE 11: WR ELECTRICAL DATA - LOW STATIC DRIVE MOTOR W/O POWERED CONVENIENCE OUTLET COMPRESSORS HEATER OPTION MIN. MAX. FUSE/ MODEL OD FAN CONV BLOWER CIRCUIT BRKR (TON- VOLTAGE MOTORS OUTLET MOTOR AMPACITY SIZE MODEL STAGES AMPS NAGE) FLA EACH AMPS EACH EACH...

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

    284813-YIM-C-1008 TABLE 12: WR ELECTRICAL DATA - STANDARD DRIVE MOTOR WITH POWERED CONVENIENCE OUTLET COMPRESSORS HEATER OPTION MIN. MAX. FUSE/ MODEL OD FAN CONV BLOWER CIRCUIT BRKR (TON- VOLTAGE MOTORS OUTLET MOTOR AMPACITY SIZE MODEL STAGES AMPS NAGE) FLA EACH AMPS EACH EACH...

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

    284813-YIM-C-1008 TABLE 13: WR ELECTRICAL DATA - HIGH STATIC DRIVE MOTOR WITH POWERED CONVENIENCE OUTLET COMPRESSORS HEATER OPTION MIN. MAX. FUSE/ MODEL OD FAN CONV BLOWER CIRCUIT BRKR (TON- VOLTAGE MOTORS OUTLET MOTOR AMPACITY SIZE MODEL STAGES AMPS NAGE) FLA EACH AMPS EACH EACH...

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

    284813-YIM-C-1008 TABLE 14: WR ELECTRICAL DATA - LOW STATIC DRIVE MOTOR WITH POWERED CONVENIENCE OUTLET COMPRESSORS HEATER OPTION MIN. MAX. FUSE/ MODEL OD FAN CONV BLOWER CIRCUIT BRKR (TON- VOLTAGE MOTORS OUTLET MOTOR AMPACITY SIZE MODEL STAGES AMPS NAGE) FLA EACH AMPS EACH EACH...
  • Page 30 284813-YIM-C-1008 ECONOMIZER / MOTORIZED DAMPER FIXED OUTDOOR INTAKE AIR AND POWER EXHAUST RAIN HOODS (See detail Y) BLOWER MOTOR BLOWER ACCESS ACCESS (Location of (Location of Optional VFD Bypass) BLOWER Optional VFD) COMPARTMENT ACCESS COMPRESSOR ACCESS 180-19/32 DOT PLUG 52-5/8 (For pressure drop reading) GAS OR ELECTRIC...
  • Page 31 284813-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 Clearance And Rain Hood Dimensions

    284813-YIM-C-1008 NOTE: ELEC / ELEC Models: Units and ductwork are CLEARANCE 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 33: Cfm, Static Pressure, And Power - Altitude And Temperature Corrections

    284813-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 284813-YIM-C-1008 ltitude/Temperature Conversion Factor SEA LEVEL TEMPER TURE (°F) FIGURE 15 - ALTITUDE/TEMPERATURE CONVERSION FACTOR Johnson Controls Unitary Products...

  • Page 35: Wr180 Blower Performance - 15 Ton Standard Drive (Cooling Only)

    284813-YIM-C-1008 TABLE 16: WR180 BLOWER PERFORMANCE - 15 TON STANDARD DRIVE (COOLING ONLY) DOWNFLOW Blower Performance (Downflow Discharge) ESP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM BHP CFM RPM BHP CFM RPM 6284 956 3.50 4.20 6080 922 3.14 3.77 5800 889 2.84 3.41 5514 856 2.536 3.04 5290 821 2.209 2.65 5056 788 1.992 2.39 5918 957 3.25 3.89 5718 923 2.92 3.51 5434 889 2.61 3.13 5228 857 2.32 2.78 4914 822...

  • Page 36: Wr180 Blower Performance - 15 Ton Standard Drive (Gas Heat) Downflow

    284813-YIM-C-1008 TABLE 17: WR180 BLOWER PERFORMANCE - 15 TON STANDARD DRIVE (GAS HEAT) DOWNFLOW Blower Performance (Downflow Discharge) 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 6158 956 3.29 3.95 5958 922 2.96 3.55 5684...

  • Page 37: Wr180 Blower Performance - 15 Ton High Static Drive (Cooling Only) Downflow

    284813-YIM-C-1008 TABLE 18: WR180 BLOWER PERFORMANCE - 15 TON HIGH STATIC DRIVE (COOLING ONLY) DOWNFLOW Blower Performance (Downflow Discharge) ESP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM BHP CFM RPM KW BHP 7695 1120 5.68 6.93 7434 1082 5.12 6.25 7139 1043 4.55 5.55 6853 1005 4.10 4.92 6537 966 3.614 4.34 6173 926 3.20 3.84...

  • Page 38: Wr180 Blower Performance - 15 Ton High Static Drive (Gas Heat) Downflow

    284813-YIM-C-1008 TABLE 19: WR180 BLOWER PERFORMANCE - 15 TON HIGH STATIC DRIVE (GAS HEAT) DOWNFLOW Blower Performance (Downflow Discharge) 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 7541 1120 5.34 6.51 7285 1082 4.81 5.87 6996 1043 4.28 5.22 6716 1005 3.85 4.63 6406 966 3.40 4.08 6050 926 3.00 3.61 7197 1122 5.02 6.12 6947 1083 4.51 5.50 6655 1044 4.06 4.88 6367 1005 3.58 4.29 6034 966 3.08 3.70 5675 927 2.74 3.29 6854 1123 4.69 5.72 6616 1084 4.21 5.14 6347 1046 3.81 4.58 6066 1006 3.41 4.09 5738 967 3.06 3.67 5321 927 2.58 3.09...

  • Page 39: Wr240 Blower Performance - 20 Ton Standard Drive (Cooling Only)

    284813-YIM-C-1008 TABLE 20: WR240 BLOWER PERFORMANCE - 20 TON STANDARD DRIVE (COOLING ONLY) DOWNFLOW Blower Performance (Downflow Discharge) ESP CFM RPM KW CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP 9557 1071 7.78 9.49 9313 1036 7.22 8.81 8842 1002 6.35 7.75 8481 968 5.68 6.93 8267 932 5.22 6.38...

  • Page 40: Wr240 Blower Performance - 20 Ton Standard Drive (Gas Heat) Downflow

    284813-YIM-C-1008 TABLE 21: WR240 BLOWER PERFORMANCE - 20 TON STANDARD DRIVE (GAS HEAT) DOWNFLOW Blower Performance (Downflow Discharge) ESP CFM RPM KW CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP 9892 1106 8.30 10.13 9366 1071 7.31 8.92 9127 1036 6.78 8.28 8665 1002 5.97 7.28 8311 968 5.34 6.52 8102 932 4.91 5.99...

  • Page 41: Wr240 Blower Performance - 20 Ton High Static Drive (Cooling Only) Downflow

    284813-YIM-C-1008 TABLE 22: WR240 BLOWER PERFORMANCE - 20 TON HIGH STATIC DRIVE (COOLING ONLY) DOWNFLOW Blower Performance (Downflow Discharge) CFM RPM KW CFM RPM KW CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP 11465 1201 11.98 14.62 10938 1167 10.57 12.90 10528 1131 9.67 11.80 9886 1096 8.54 10.43 9525 1063 7.55 9.21 9054 1027 7.05 8.60 11056 1202 11.46 13.98 10545 1168 10.23 12.48 10137 1133 9.20 11.23 9488 1097 8.17 9.98 9092 1064 7.32 8.93 8633 1028 6.45 7.87 10697 1203 10.97 13.39 10169 1169 9.78 11.93 9769 1134 8.68 10.59 9109 1099 7.70 9.39 8729 1065 7.28 8.88 8237 1029 6.18 7.54...

  • Page 42: Wr240 Blower Performance - 20 Ton High Static Drive (Gas Heat) Downflow

    284813-YIM-C-1008 TABLE 23: WR240 BLOWER PERFORMANCE - 20 TON HIGH STATIC DRIVE (GAS HEAT) DOWNFLOW Blower Performance (Downflow Discharge) CFM RPM CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP 11236 1201 11.26 13.74 10719 1167 9.94 12.13 10317 1131 9.09 11.09 9688 1096 8.03 9.80 9335 1063 7.10 8.66 8873 1027 6.62 8.08 10835 1202 10.77 13.14 10334 1168 9.62 11.73 9934 1133 8.65 10.56 9298 1097 7.68 9.38 8910 1064 6.88 8.39 8460 1028 6.06 7.40 10483 1203 10.31 12.58 9966 1169 9.19 11.22 9574 1134 8.16 9.96 8927 1099 7.23 8.83 8554 1065 6.84 8.35 8072 1029 5.81 7.09...

  • Page 43: Wr300 Blower Performance - 25 Ton Standard Drive (Cooling Only)

    284813-YIM-C-1008 TABLE 24: WR300 BLOWER PERFORMANCE - 25 TON STANDARD DRIVE (COOLING ONLY) DOWNFLOW Blower Performance (Downflow Discharge) RPM KW BHP RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP 10636 1106 9.46 11.55 10163 1072 8.55 10.44 9813 1036 7.76 9.47 9394 999 6.98 8.52 8936 963 6.14 7.49 8388 927 5.45 6.65 10312 1106 9.06 11.06 9824...

  • Page 44: Wr300 Blower Performance - 25 Ton Standard Drive (Gas Heat) Downflow

    284813-YIM-C-1008 TABLE 25: WR300 BLOWER PERFORMANCE - 25 TON STANDARD DRIVE (GAS HEAT) DOWNFLOW Blower Performance (Downflow Discharge) RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP 10423 1106 8.89 10.85 9960 1072 8.04 9.81 9617 1036 7.29 8.90 9206 999 6.56 8.01 8757 963 5.77 7.04 8220 927 5.12 6.25 10106 1106 8.52 10.40 9628 1072 7.68 9.38 9274 1036 6.92 8.45 8826 1000 6.20 7.57 8382 963 5.48 6.68 7827 927 4.80 5.85 9776...

  • Page 45: Wr300 Blower Performance - 25 Ton High Static Drive (Cooling Only) Downflow

    284813-YIM-C-1008 TABLE 26: WR300 BLOWER PERFORMANCE - 25 TON HIGH STATIC DRIVE (COOLING ONLY) DOWNFLOW Blower Performance (Downflow Discharge) ESP CFM RPM KW CFM RPM KW CFM RPM KW CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP 0.4 11830 1216 12.80 15.62 11374 1181 11.51 14.05 11030 1146 10.55 12.87 10572 1111 9.50 11.59 10220 1075 8.67 10.58 9928 1041 7.91 9.65 0.6 11546 1217 12.31 15.02 11079 1181 11.12 13.57 10600 1147 10.00 12.20 10231 1112 9.11 11.12 9885 1076 8.28 10.10 9575 1040 7.52 9.18 0.8 11239 1217 11.87 14.49 10770 1182 10.79 13.17 10232 1147 9.63 11.75 9912 1112 8.87 10.82 9537 1077 7.94 9.69 9207 1042 7.08 8.63...

  • Page 46: Wr300 Blower Performance - 25 Ton High Static Drive (Gas Heat) Downflow

    284813-YIM-C-1008 TABLE 27: WR300 BLOWER PERFORMANCE - 25 TON HIGH STATIC DRIVE (GAS HEAT) DOWNFLOW Blower Performance (Downflow Discharge) ESP CFM RPM KW CFM RPM KW CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP CFM RPM KW BHP 0.4 11593 1216 12.03 14.68 11147 1181 10.82 13.20 10809 1146 9.91 12.10 10361 1111 8.93 10.90 10016 1075 8.15 9.95 9729 1041 7.43 9.07 0.6 11315 1217 11.57 14.12 10857 1181 10.45 12.76 10388 1147 9.40 11.47 10026 1112 8.56 10.45 9687 1076 7.78 9.49 9384 1040 7.07 8.63 0.8 11014 1217 11.16 13.62 10555 1182 10.14 12.38 10027 1147 9.05 11.05 9714 1112 8.34 10.17 9346 1077 7.46 9.11 9023 1042 6.65 8.12...

  • Page 47: Static Resistances

    284813-YIM-C-1008 TABLE 28: STATIC RESISTANCES RESISTANCE, IWG DESCRIPTION 15 TON 20 TON 25 TON 4500 6000 7500 6000 8000 9000 7500 8000 9000 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.

  • Page 48: Charging Chart - 20 Ton

    284813-YIM-C-1008 WR180 Charging Chart (ºF) Outdoor Temp 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: Phasing

    284813-YIM-C-1008 º ) º º º º 7 º º FIGURE 18 - CHARGING CHART - 25 TON PHASING 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 misphased. Belt drive blower systems MUST be adjusted to the Change the incoming line connection phasing to obtain specific static and CFM requirements for the...

  • Page 50: Air Balance

    284813-YIM-C-1008 NOTE: The tubes must be inserted and held in a posi- PROCEDURE FOR ADJUSTING BELT TENSION: tion perpendicular to the air flow so that veloc- Loosen nuts (A) (top and bottom). Adjust the tension by turning bolt (B). ity pressure will not affect the static pressure Never loosen nuts (C) from each other.

  • Page 51: Operation

    284813-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 52: Economizer With Dual Enthalpy Sensors

    284813-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 53: Economizer With Optional Vav Blower With Power Exhaust

    284813-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 54: Low Ambient Cooling

    284813-YIM-C-1008 Should a freezestat open three times within two hours The other refrigerant system will continue in operation of operation, the UCB will lock-out the associated com- unless it is affected by the fault as well. pressor and flash a code (Table 36). If the other com- The unit control board monitors the temperature limit pressor is inactive, the condenser fans will be de- switch of electric heat units and the temperature limit...

  • Page 55: Alternate" Mode

    284813-YIM-C-1008 which de-energizes SOL 3 and SOL 2, and energizes connected to RHTB-1 and RHTB-2, and there is not a SOL 1, engaging circuit # 1, resulting in circuit #1 cool- call for cooling, it energizes the HGR, which energizes ing mode operation.

  • Page 56: Reheat Control Board

    284813-YIM-C-1008 HGRR DEHUMIDISTAT MODE HARNESS SELECTION CONNECTION JUMPER FIGURE 21 - REHEAT CONTROL BOARD Johnson Controls Unitary Products...
  • Page 57 284813-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 58: Electric Heating Sequence Of Operations

    284813-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 59: Heating Operation Errors

    284813-YIM-C-1008 If the second stage of heat is required, heater cated in the Limit Control Setting Table 31. It is a contactor (7M) will be energized. Note that on manual reset limit. These limit switches will de- the 54 KW, 240V heater, heater contactors energize the heaters should the primary limit fail to (7M &...

  • Page 60: Gas Heating Sequence Of Operations

    284813-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 61: Gas Heating Operation Errors

    284813-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 62: Flash Codes

    284813-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 63: Operating Instructions

    284813-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 64: Manifold Gas Pressure Adjustment

    284813-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 65: Adjustment Of Temperature Rise

    284813-YIM-C-1008 2. With the furnace turned on, measure the time After the temperature rise has been determined, the needed for one revolution of the hand on the small- cfm can be calculated as follows: est dial on the meter. A typical gas meter usually has a 1/2 or a 1 cubic foot test dial.
  • Page 66 284813-YIM-C-1008 On calls for cooling, if the compressors are operating minal, “FAN”. If 24 volts is present at the FAN, but the supply air blower motor does not energize after check for loose wiring between the UCB and M3. a short delay (the room thermostat fan switch is in the “AUTO”...
  • Page 67 284813-YIM-C-1008 Cancel any calls for cooling and wait for the inter- NOTE: While the above step will reset any lockouts, nal overload to reset. Test again when cool. compressor #1 may be held off for the ASCD. See the next step. 4.
  • Page 68 284813-YIM-C-1008 14. The UCB can be programmed to lock out compres- 4. If M2 is not pulled in, check for 24 volts at the M2 sor operation during free cooling and in low ambi- coil. If 24 volts is present and M2 is not pulled in, ent conditions.
  • Page 69 284813-YIM-C-1008 5 minutes. Press and release the TEST button to 5. Failing the above, if voltage is supplied at M1, M1 reset all ASCDs. is pulled in, and the compressor still does not oper- ate, replace the compressor. 11. The UCB can be programmed to lock out compres- sor operation during free cooling and in low ambi- 6.

  • Page 70: Gas Heat Troubleshooting Guide

    284813-YIM-C-1008 omizer terminals of the UCB may be improperly GAS HEAT TROUBLESHOOTING GUIDE wired. Check for 24 volts at the Y1 “OUT” terminal of the UCB. If 24 volts is present, trace the wiring from Y1 “OUT” for incorrect wiring. If 24 volts is not present at the Y1 “OUT”...
  • Page 71 284813-YIM-C-1008 On calls for heating, the draft motor operates and the Proper operation of the room thermostat (contact between R and G with the fan switch in the “ON” furnace lights but the supply air blower motor does not position and in the “AUTO” position during operation energize after a short delay (the room thermostat fan calls).
  • Page 72 284813-YIM-C-1008 The draft motor runs but the furnace does not light and The draft motor runs and the ignitor sparks at the pilot the sparker does not spark. burner but the pilot does not ignite and a gas odor is not detected at the draft motor outlet.

  • Page 73: Unit Control Board Flash Codes

    284813-YIM-C-1008 4. Make sure that the ground connections at the pilot UNIT CONTROL BOARD FLASH CODES burner, gas valve and ignitor control are intact. Check the high tension wire for good electrical con- Various flash codes are utilized by the unit control nection.

  • Page 74: Unit Control Board

    284813-YIM-C-1008 TABLE 36: UNIT CONTROL BOARD FLASH CODES GREEN FLASH CODE DESCRIPTION On Steady This is a Control Failure 1 Flash Not Applicable 2 Flashes Flashing Control waiting ASCD 3 Flashes HPS1 Compressor Lockout 4 Flashes HPS2 Compressor Lockout 5 Flashes LPS1 Compressor Lockout 6 Flashes LPS2 Compressor Lockout...

  • Page 75: Unit Control Board Option Setup

    284813-YIM-C-1008 UNIT CONTROL BOARD OPTION SETUP • Press the COMM SETUP / SELECT button to tog- gle into the Heat Delay Setup, the green LED will turn off and the red LED for Heat Delay will turn on. OPTION BYTE SETUP •...

  • Page 76: Optional Vav Control Board Flash Codes

    15 Flashes Dirty Filter Switch No Power or Control Failure Subject to change without notice. Printed in U.S.A. 284813-YIM-C-1008 Copyright © 2008 by Johnson Controls, Inc. All rights reserved. Supersedes: 284813-YIM-B-0707 Johnson Controls Unitary Products 5005 York Drive Norman, OK 73069...

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