Heatcraft Refrigeration Products 25000102 Unit Access, Vertical Clearance, Decorative Fences

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Installation and Operations Manual

Unit Access

Always provide sufficient clearance for unit maintenance and service. Minimum clearances for most situations are described below (except 60 Inches of free space is required in front of the control panel). Please note that these are minimums and more clearance may be required by local codes.

Vertical Clearance

Overhead obstructions are not permitted. Vertical air discharge from the condenser must have no obstructions that can cause the discharge air to be recirculated back to the inlet side of the unit.

Lateral Clearance (Walls or Obstructions)

The unit should be located so that air may circulate freely and not be recirculated. For proper air flow and access, all sides of the unit (except control panel end ) should be a minimum of four feet (1.2 m) away from any wall or obstruction. It is preferred that this distance be increased whenever possible. Care should be taken to see that ample room is left for maintenance work through access doors and panels. When the unit is in an area where it is enclosed by three walls the unit must be installed under the guidelines for unit installations in pits.

Decorative Fences

Fences may be installed closer than the four foot (1.2 m) lateral minimum (except on the control panel end) requirement whenever fences permit sufficient free area to allow adequate air flow to the unit. Once again, care should be taken to leave ample room for unit service. Recommended service clearances are listed above.

Units in Pits

The top of the unit should be level with the top of the pit. If the top of the unit is not level with the top of the pit, a wider pit or discharge stacks must be used to raise discharge air to the top of the pit. This is a minimum requirement.

Multiple Units (Unit-to-Unit Clearance)

For units placed side by side, the minimum distance between units is eight feet (2.4 m) to prevent air recirculation.

Part # 25000102

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Contents Parallel Compressor Systems Table of Contents Unit Designation IntroductionInspection Model DefinitionLocation Of Equipment Indoor Clearances System WarrantyRigging Floor & Foundation RequirementsRoof Mounting Location of Equipment OutdoorGround Mounting Unit Vibration IsolationDecorative Fences Unit AccessVertical Clearance Units in PitsRefrigerant Piping Ventilation Requirements Indoor UnitsElectrical Suction P-TrapsRefrigerant Line Insulation Refrigerant Line SupportExpansion Loops Table of Values for LRef. Line Amount of Expansion Liquid Line Rise in Feet Refrigerant 10’ Pressure Loss of Liquid RefrigerantsEquivalent Feet of Pipe 20’ 25’ 30’ 40’ 50’ 75’ 100’Weight of Refrigerants in Copper Lines During Operation Suction Line at Suction TemperatureLine 40F 20F Recommended Line Sizes for R-404A/R-507 Lengths Liquid Line SizeExpansion Valve 100’ 150’ 200’ 25’Recommended Line Sizes for R-22 Suction Line SizeCapacity 40˚F 20˚F 10˚F Liquid Line Size Suction Temperature 10˚F12 & R-134A 502 507 & R-404A Recommended Remote Condenser Line SizesNet TotalLeak Checking, Evacuation and Start-up EvacuationStart-up Electric Defrost Refrigerant DistributionOff-Cycle Priority I Hot Gas DefrostSystem Superheat Electronic Control SystemSystem Balancing Evaporator SuperheatTypical Voltage Ranges CompressorsCopeland Compressors 4D/6D Solid State Modules Unloader FactorsApproved Copeland Lubricants Oil Safety SwitchOil Charges Carlyle CompressorsPhase Voltage Monitor Part Load Performance MultipliersRequired Differential Pressure for Unloader Operation Sight Glass & Moisture Indicator Sight Glass Safety Relief DevicesHenry Relief Valve Capacity Rating Discharge Piping TableLiquid Level Switch Auto Reset ModelsManual Reset Models Level Switch TableModule Replacement Oil ControlOil Separators Temprite Valve Adjustment Temprite ModelsOil Level Regulators Liquid Filter-Driers & Suction Filters Troubleshooting Oil SystemAC&R Model Regulators Sporlan Valve CoSporlan Valve Company CompressorMotorBurnoutCleanupProcedureSuction Filter Replaceable Suction FilterSuperior Valve Company Type DF for cleanupType AFD for cleanup Type F FilterHot Gas Bypass Regulator Adjustment Recommended Valve SettingsField Adjustment Liquid Drain Control MethodControl Settings for R-22 Control SettingsControl Settings for R-404A/R-507 Low Pressure Switch Setting for RmccMonthly General Maintenance ScheduleWeekly QuarterlyDoes Not Run Symptom Cause Remedy CompressorTemperature Unit ShortHigh Suction Symptom Cause Remedy LowSwitch Open Low SuctionService Record System Reference Data