Related Manuals for Drummond MRC-24CWN1-M13T
Summary of Contents for Drummond MRC-24CWN1-M13T
- Page 1 INSTALLATION INSTRUCTIONS PACKAGE 13 SEER - AIR CONDITIONER 2 - 5 TONS. MRC-24CWN1-M13T, MRC-36CWN1-M13L, MRC-48CWN1-M13L, MRC-60CWN1-M13L. R-410A Refrigerant MAN-I-IDP13-0418...
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Page 2: Table Of Contents
TABLE OF CONTENTS 1.0 SAFETY........................3 ..1.1 INSPECTION......................4 1.2 LIMITATIONS......................4 2.0 INSTALLATION.......................4 2.1 PRE-INSTALLATION...................4 ..2.2 CLEARANCE......................5 2.3 RIGGING AND HANDING..................5 3.0 DUCTWORK........................8 4.0 CONDENSATE DRAIN CONNECTION................8 4.1 INSTALL DRAIN PIPE……………………………………………….......8 ..5.0 FILTERS.......................9 ..6.0 ELECTRICAL WIRING..................9 6.1 POWER WIRING......................9 6.2 GROUNDING.................... -
Page 3: Safety
This document is customer property and is to remain with this unit. These instructions do not cover all the different variations of systems nor does it provide for every possible contingency to be met in connection with installation. All phases of this installation must comply with NATIONAL, STATE and LOCAL CODES. -
Page 4: Inspection
WARNING The unit must be permanently grounded. A grounding lug is provided. Failure to ground this unit can result in fire or electrical shock causing property damage, severe personal injury or death. WARNING Only electric heater kits supplied by this manufacturer as described in this publication have been designed, tested, and evaluated by a nationally recog- nized safety testing agency for use with this unit. -
Page 5: Clearance
2.2 CLEARANCE All units require certain clearance for proper operation and service. Refer to Table 2-1 for the clearances required for construction, servicing and proper unit operation. 2.3 RIGGING AND HANDING Exercise care when moving the unit. Do not remove any packaging until the unit is near the place of installation. -
Page 6: Fig. 2-2 Unit Dimensions
024, 036 Unit size： Condenser coil Left Side supply air opening Hi./Lo. pressure Side return detected valve air opeing Front 1/4’’ SAE High voltage conn. 1-23/64” Dia. Low vlotage entrance 7/8” Dia. Electrical service access Condensate drain compapartment panel connection 3/4” NPTI (Trap required) Fig. -
Page 7: Table 2-1 Unit Clearance
048, 060 Unit size： Condenser coil Left Hi./Lo. pressure detected valve Side supply Front 1/4’’ SAE air opening Side return High voltage conn. 1-23/64” Dia. air opeing Low vlotage entrance 7/8” Dia. Condensate drain Electrical service access connection 3/4” NPTI compapartment panel (Trap required) Fig. -
Page 8: Ductwork
3.0 DUCTWORK Ductwork should be made and sized by installer and in accordance with Air Manual from Conditioning Contractors of America and local codes. NOTE On ductwork exposed to outside air conditioning space, use at least 2” of insulation and a vapor barrier. Flexible joint may be used to reduce noise. A closed return duct system shall be used. -
Page 9: Filters
5.0 FILTERS Units are shipped without a filter or filter racks. It is the responsibility of the installer to secure a filter in the return air ductwork or install a filter/frame Kit. Filter must always be used and must be kept clean. When filter become dirt laden, insufficient air will be delivered by the blower, decreasing your units efficiency and increasing operation costs and wear-and tear on the unit and controls. -
Page 10: Grounding
6.2 GROUNDING WARNING The unit must be permanently grounded. Failure to do so can result in electrical shock causing personal injury or death. • Grounding may be accomplished by grounding metal conduit when installed in accordance with electrical codes to the unit cabinet. •... -
Page 11: Fig. 6-1 Typical Field Control Wiring Diagram
UNIT CONTROL BOARD THERMOSTAT THERMINAL STRIP 240V 208V Fig. 6-1 Typical Field Control Wiring Diagram ** Minimum wire size of 18 AWG wire should be used for all field installed 24 volt wire. Only required on units with supplemental electric heat. CAUTION Label all wire prior to disconnection when servicing controls. - Page 12 Table 6-1: 13 SEER Cooling only W/Without Electric Heat OD Fan Supply Max Fuse2/ Size Compressors (each) Motors Blower Electric Heat Option Volt MCA1 (Amps) Breaker3 Size (Tons) (each) Motor (Amps) Model Stages Amps None None 14.5 024T EHK-05E 3.8/5 18.1/20.8 24.8/28.2 25/30...
- Page 13 Table 6-2: 13 SEER Physical Data Models Component Component MRC-48CWN1-M13L MRC-60CWN1-M13L MRC-24CWN1-M13T MRC-36CWN1-M13L MRC-36CWN1-M13L Nominal Tonnage ARI COOLING PERFORMANCE ARI COOLING PERFORMANCE 48,813 58,075 Gross Capacity @ ARI A point (Btu) 35,963 Gross Capacity @ ARI A point (Btu) 35,963...
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Page 14: Airflow Performance
7.0 AIRFLOW PERFORMANCE Airflow performance data is based on cooling performance with a coil and no filter in place. Use this perfor- mance table for appropriate unit size, external static applied to unit and allow operation within the minimum and maximum limits shown in table below for both cooling and electric heat operation. 7.1 AIRFLOW PERFORMANCE DATA Table 7-1 Duct Application(208v) CFM(L/S)(Watts) - Page 15 Table 7-1 Duct Application(208v) (Continued) CFM(L/S)(Watts) Model Motor External Static Pressure-Inches W.C.[kPa] Number Speed 0[0] 0.1[.02] 0.2[.05] 0.3[.07] 0.4[.10] 0.5[.12] 0.6[.15] 0.7[.17] CFM(L/S) 1865(879) 1822(859) 1770(835) 1712(808) 1643(775) Watts Amps 3.08 2.98 2.88 2.79 2.69 1875(884) 1808(853) 1729(816) 1642(774) 1542(727) CFM(L/S) 1005 1024...
- Page 16 Table 7-2 Duct Application(230v) (Continued) CFM(L/S)(Watts) Model Motor External Static Pressure-Inches W.C.[kPa] Number Speed 0[0] 0.1[.02] 0.2[.05] 0.3[.07] 0.4[.10] 0.5[.12] 0.6[.15] 0.7[.17] 1676(790) 1623(766) 1568(740) 1510(712) 1443(681) CFM(L/S) Watts Amps 2.42 2.37 2.32 2.27 2.21 1721(812) 1669(787) 1593(751) 1516(715) 1429(674) CFM(L/S) Middle Watts...
- Page 17 Table 7-3 Refrigerant charge for A/C system MRC-24CWN1-M13T Cooling Charge Chart Cooling Mode Outdoor Ambient Temperature( F) High Pressure Detected Valve(psig)/Vanne Détecté de Pression Haute(en psig) Table 7-4 Refrigerant charge for A/C system MRC-36CWN1-M13L Cooling Charge Chart Cooling Mode Outdoor Ambient Temperature( F) High Pressure Detected Valve(psig)/Vanne Détecté...
- Page 18 Table 7-6 Refrigerant charge for A/C system MRC-60CWN1-M13L Cooling Charge Chart Cooling Mode Outdoor Ambient Temperature( F) High Pressure Detected Valve(psig)/Vanne Détecté de Pression Haute(en psig)
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Page 19: System Operation
8.0 SYSTEM OPERATION 8.1 COMPRESSOR CRANKCASE HEATER(OPTIONAL) Refrigerant migration during the off cycle can result in a noisy start up. Add a crankcase heater to minimize refrigeration migration, and to help eliminate any start up noise or bearing “wash out”. All heaters are located on the lower half of the compressor shell. - Page 20 Low pressure protection When low pressure is ＜21PSIG,the compressor and the outdoor fan motor will stop running. When low pressure is ＞44PSIG,the compressor and the outdoor fan motor will start running(3 minutes delay necessary ). In stand-by status, if low pressure protection was checked out, the compressor would not start running.
- Page 21 Table 8-1: Thermostat Signals Signal State Board Function Blower instant ON Blower 90 sec. delay OFF Blower instant ON Heater bank 1 elec.onstant ON G & W1 Heater bank 1 elec.instant OFF Blower 90 sec. delay OFF Blower instant ON Heater 1 instant ON Heater 2 instant ON G &...
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Page 22: Operation Check-Up
9.0 OPERATION CHECK-UP • Cooling Startup 1. Turn thermostat to OFF and turn power to ON 2. Turn ON thermostat and set as high as possible 3. Turn Fan switch ON and indoor blower should run 4. Turn fan switch to AUTO, system switch to COOL and thermostat tem perature setting below room temperature.
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