Lennox Merit 13CHP-24 Installation Instructions Manual Download Page 1 | Manualshive

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Summary of Contents for Merit 13CHP-24

Page 1: ...g transit If you find any damage immediately contact the last carrier Ak WARNING Ak WARNING Shipping Packing List 1 Unit Dimensions 2 Parts Arrangement 3 General 3 Requirements 4 Location Selection 4 Rigging Setting Unit 4 Clearances 4 Existing Common Vent Systems 5 Condensate Drain 6 Filters 6 Supply Return Connections 6 Compressors 7 Electrical 7 Defrost System 10 Unit Start Up and Operation 11 ...

Page 2: ... 5 HORIZONTAL HORIZONTAL SUPPLY AIR RETURN AIR BACK VIEW o ELECTRICAL INLET 2 1 2 64 _ _ CONDENSATE DRAIN END VIEW END VIEW A B C D E Model No in mm in mm in mm in mm in mm 13C H P 24 13CHP 30 34 1 4 870 65 3 8 1661 36 1 2 927 11 1 4 286 17 1 4 438 13CHP 36 13C H P 42 13CHP 48 38 1 4 972 75 1905 46 1168 11 1 4 286 19 1 4 489 13CHP 60 F G H J K L Model No in mm in mm in mm in mm in mm in mm 13CHP 2...

Page 3: ...ter or air conditioner is not recommended during any phase of construction Very low return air temperatures harmful vapors and operation of the unit with clogged or misplaced filters will damage the unit If this unit has been used for heating or cooling of buildings or structures under construction the following conditions must be met or the warranty will be void A room thermostat must control the...

Page 4: ...installation An optional lifting lug kit 92M51 may be purchased separately for use in rigging the unit for lifting Spreaders MUST be used across the top of the unit Recommended spreader length 2 2 1 2 3 ton units 44 3 1 2 4 5 ton units 54 Accessory Lift Kit Use the following guidelines to select a suitable location for these units 1 Unit is designed for outdoor installation only Unit must be insta...

Page 5: ...in the common venting sys tem 2 Inspect the venting system for proper size and horizontal pitch Determine that there is no blockage restriction leakage corrosion or other deficiencies which could cause an unsafe condition 3 Close all building doors and windows and all doors be tween the space in which the appliances remaining connected to the common venting system are located and other spaces of t...

Page 6: ...ate the use of 1 2 or 4 filters If the optional filter kit is not used a filter must be field installed Filters must always be installed ahead of evaporator coil and must be kept clean or replaced Dirty filters will reduce the airflow of the unit Filter sizes are shown in table 1 Table 1 Unit Filter Size Unit Model Filter Size Filter Quantity 24 30 36 20 in X 25 in 1 42 48 60 16 in X 25 in 2 The d...

Page 7: ...ire must be of the type shown on the wiring diagram Electrical wiring must be sized to carry minimum circuit ampacity marked on the unit USE COPPER CONDUCTORS ONLY Each unit must be wired with a separate branch circuit and be properly fused WARNING CAUTION WARNING See figure 7 for typical field wiring connections and figure 8 for typical unit wiring diagram Optional Electric Heat Optional electric...

Page 8: ... Control RiO R7 i _ QI R4 RS R1 RII dl d3 IdS R6 3 R5 0 C2 _ D3 3 _N_X Z1 _ D1 D5 OWl C3_ _ _ X Z2 1005 83 175 x HSC Figure 6 Typical Single Phase Unit Wiring Connections _N_LLED THE_X_T_ JJ_ _D_JMD Figure 7 Page 8 ...

Page 9: ...tored omly then Yl Imp It il o til _ the Ode for pressure witch opel will not be seenwhen Yt is oft lanced the Morro It Oporotio or Aett Short Cycle codewill be wen Also wheno pressure lilts opeR_andcou_edo short cycle lockout the pressure _litoh epe code wilt be seen until it loven then the short cycle Iockolt codewill tlo_h nloss it So already expired All WI WE CA BE USED TO STAGE ELECTRIC HEAT ...

Page 10: ...ns Test Pins Compressor Delay Pins Reversing Valve Low Pressure Loss of Charge Switch Defrost T stat j High Pressure i Switch Defrost Control Board PI _ FAll LO PS _Diagnostic LEDs 24V Terminal Strip Connections Figure 9 The defrost thermostat is located on the liquid line be tween the check expansion valve and the distributor When the defrost thermostat senses a liquid line tempera ture of 42 F o...

Page 11: ... as well as the compressor contactor The compressor and outdoor fan immediately stop The circulating air blower continues operating through a 90 second delay Unit compressors have internal protection If there is an abnormal rise in the compressor temperature the protector will open and the compressor will stop Heating Sequence of Operation When the thermostat calls for heating the R to Y circuit i...

Page 12: ...9 195 204 208 214 220 153 159 164 171 174 179 184 190 195 202 205 210 215 Liquid 135 146 158 174 181 192 204 215 227 243 250 261 273 128 142 156 175 183 197 211 225 239 258 266 2860 294 160 165 170 177 180 185 190 195 200 207 210 215 220 Motors The top of the condenser fan should be 1 1 2 inchs from the bottom of the top grille This dimension should be checked and the fan should be adjusted accord...

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