Carrier AQUAZONE 50PTH Installation And Service Instructions Manual

8Step 3 — Locate Unit — The following guidelinesshould be considered when choosing a location for a WSHP:• Units are for indoor use only.• Locate in areas where ambient temperatures are between39 F and 102 F and relative humidity is no greater than75%.• Provide sufficient space for water, electrical and ductconnections.• Locate unit in an area that allows easy access and removalof filter and access panels.• Allow enough space for service personnel to performmaintenance.• Return air must be able to freely enter the space if unit needsto be installed in a confined area such as a closet.• Install the unit on a piece of rubber, neoprene or othermounting pad material for sound isolation. The padshould be at least 3 /8 in. [10 mm] to 1/2 in. [13 mm] inthickness. Extend the pad beyond all four edges of theunit.• Provide adequate clearance for filter replacement anddrain pan cleaning. Do not block filter access with pip-ing, conduit or other materials. Refer to Fig. 1, 3, and 4for dimensional data.• Provide access for fan and fan motor maintenance andfor servicing the compressor and coils without removingthe unit.• Provide an unobstructed path to the unit within the closetor mechanical room. Space should be sufficient to allowremoval of the unit, if necessary.• In limited side access installations, pre-removal of thecontrol box side mounting screws will allow control boxremoval for future servicing.• Provide access to water valves and fittings and screw-driver access to the unit side panels, discharge collar andall electrical connections.NOTE: Correct placement of the horizontal unit can play animportant part in minimizing sound problems. Since duct-work is normally applied to these units, the unit can beplaced so that the principal sound emission is outside the oc-cupied space in sound-critical applications. A fire dampermay be required by the local code if a fire wall is penetrated.FIELD CONVERSION OF DISCHARGE AIR — The dis-charge air of the 50PTH horizontal units can be convertedbetween side and back discharge in the field. The conversionprocess is the same for right and left return configurations. SeeFig. 7 and 8.NOTE: It is not possible to convert return air between left orright return models in the field due to refrigerant pipingchanges.Preparation — The unit should be on the ground in a well litarea. Hung units should be taken down to ground level beforeconverting.Side to Back Discharge Conversion1. Remove screws to free the top and discharge panels. Setscrews aside for later use. See Fig. 8.2. Remove the access panel and set aside.3. Lift the discharge panel from side of unit and rotate it toback using care not to damage blower wiring.4. Check blower wire routing and connections for unduetension or contact with sheet metal edges. Re-route ifnecessary.ReturnAirPowerThermostatWiringCompressorAccess PanelBalancing Valve(field-installedaccessory)Low PressureDrop WaterControl Valve(optional)(field-installedaccessory)Ball Valve with optionalintegral P/T plug(typical for supply andreturn piping) (field-Installedaccessory)WaterOutWaterInBuildingLoopSupply AirFlexibleConnectionStainless steelbraid hosewith integral“J” swivel(field-installedaccessory)ReturnAirPowerThermostatWiringCompressorAccess PanelBalancing Valve(field-installedaccessory)Low PressureDrop WaterControl Valve(optional)(field-installedaccessory)Ball Valve withoptional integralP/T plug (typical forsupply and returnpiping)(field-installedaccessory)WaterOut WaterInBuildingLoopSupply AirFlexibleConnectionFlexibleConnectionStainlesssteelbraid hosewithintegral ”J”swivel(field-installedaccessory)NOTE: Ball valve with integral pressure temperature plug recommended.Fig. 5 — Typical Vertical Installation — 50PTV UnitNOTE: Ball valve with integral pressure temperature plug recommended.Fig. 6 — Typical Downflow Installation —50PTD UnitWaterConnection EndSupplyDuctReturn AirWaterConnection EndDrainReturn AirDischarge AirSide DischargeBack DischargeFig. 7 — Conversion Right Return,Side Discharge to Back Discharge