York YMB SERIES Installation Manual

Also see for YMB SERIES: User's information manual

Contents

York YMB SERIES Installation Manual Manual pdf 13 page image

361813-UIM-A-0208Unitary Products Group 13SECTION VIII: SYSTEM OPERATIONFor more information on the control operation, refer to “OperationInstructions - DEMAND DEFROST CONTROL BOARD in this Booklet.REQUIRED CONTROL SETUPIMPORTANT: The following steps must be taken at the time ofinstallation to insure proper system operation.1. Consult system wiring diagram to determine proper wiring forproper system configuration.2. If hot heat pump configuration is desired, change HOT HEATPUMP jumper to ON position.3. If installation includes a fossil fuel furnace, change FFUEL jumperto ON position.4. Set low temperature cutout (LTCO) and balance point (BP) jump-ers as desired.5. Verify proper system functionality. Confirm room thermostat opera-tion including fault code display capability.6. Upon completion of installation, verify that no fault codes arestored in memory. Clear the fault code memory if necessary.DEFROST OPERATIONThe following defrost curve selection jumper positions are set from fac-tory.INDICATIONS OF PROPER OPERATIONCoolingCooling operation is the same as any conventional air conditioning unit.1. The outdoor fan should be running, with warm air being dis-charged from the top of the unit.2. The indoor blower (furnace or air handler) will be operating, dis-charging cool air from the ducts. Coils or other parts in the air cir-cuit should be cleaned as often as necessary to keep the unitclean. Use a brush, vacuum cleaner attachment, or other suitablemeans.3. The vapor line at the outdoor unit will feel cool to the touch.4. The liquid line at the outdoor unit will feel warm to the touch.HeatingIndications of proper Heating operation is as follows:1. The outdoor fan should be running, with cool air being dischargedfrom the top of the unit.2. The indoor blower (furnace or air handler) will be operating, dis-charging warm air from the ducts.3. The vapor line at the outdoor unit will feel warm to the touch.4. The liquid line at the outdoor unit will feel cool to the touch.SECTION IX: INSTRUCTING THE OWNERAssist owner with processing warranty cards and/or online registration.Review Owners Guide and provide a copy to the owner and guidanceon proper operation and maintenance. Instruct the owner or the opera-tor how to start, stop and adjust temperature setting.When applicable, instruct the owner that the compressor is equippedwith a crankcase heater to prevent the migration of refrigerant to thecompressor during the “OFF” cycle. The heater is energized only whenthe unit is not running. If the main switch is disconnected for long peri-ods of shut down, do not attempt to start the unit until 8 hours after theswitch has been connected. This will allow sufficient time for all liquidrefrigerant to be driven out of the compressor.The installer should also instruct the owner on proper operation andmaintenance of all other system components.MAINTENANCE1. Dirt should not be allowed to accumulate on the outdoor coils orother parts in the air circuit. Clean as often as necessary to keepthe unit clean. Use a brush, vacuum cleaner attachment, or othersuitable means.2. The outdoor fan motor is permanently lubricated and does notrequire periodic oiling.3. If the coil needs to be cleaned, it should be washed with CalgonCoilclean (mix one part Coilclean to seven parts water). Allowsolution to remain on coil for 30 minutes before rinsing with cleanwater. Solution should not be permitted to come in contact withpainted surfaces.4. Refer to the furnace or air handler instructions for filter and blowermotor maintenance.5. The indoor coil and drain pan should be inspected and cleanedregularly to prevent odors and assure proper drainage.TABLE 1: Defrost Initiate CurvesDefrost Curve SelectionJumper Position 1 2 3 4Heat Pump Model 2-Ton2.5-Ton4-Ton5-Ton3-Ton3.5-Ton 1.5-TonIT IS UNLAWFUL TO KNOWINGLY VENT, RELEASE OR DIS-CHARGE REFRIGERANT INTO THE OPEN AIR DURINGREPAIR, SERVICE, MAINTENANCE OR THE FINAL DIS-POSAL OF THIS UNIT.WHEN THE SYSTEM IS FUNCTIONING PROPERLY ANDTHE OWNER HAS BEEN FULLY INSTRUCTED, SECURETHE OWNER’S APPROVAL.TABLE 2: R-22 Saturated PropertiesPressurePSIG Temp °F PressurePSIG Temp °F PressurePSIG Temp °F PressurePSIG Temp °F PressurePSIG Temp °F PressurePSIG Temp °F80 48 110 64 140 78 170 91 200 101 230 11182 49 112 65 142 79 172 91 202 102 232 11284 50 114 66 144 80 174 92 204 103 234 11286 51 116 67 146 81 176 93 206 103 236 11388 52 118 68 148 82 178 94 208 104 238 11490 54 120 69 150 83 180 94 210 105 240 11492 55 122 70 152 84 182 95 212 105 242 11594 56 124 71 154 84 184 96 214 106 244 11596 57 126 72 156 85 186 97 216 107 246 11698 58 128 73 158 86 188 97 218 107 248 117100 59 130 74 160 87 190 98 220 108 250 117102 60 132 75 162 88 192 99 222 109 252 118104 61 134 76 164 88 194 99 224 109 254 118106 62 136 77 166 89 196 100 226 110 256 119108 63 138 78 168 90 198 101 228 111 258 119

/ 14

Related manuals for York YMB SERIES