Carrier AQUAZONE PCV015-060 Installation And Service Instructions Manual

Also see for AQUAZONE 50PCH: Installation, Start-Up and Service Instructions Installation and service instructions Installation, Start-Up and Service Instructions

9Each unit must be installed with its own individual vent andmeans to flush or blow out the condensate drain line. Do not in-stall units with a common trap or vent.VENTING — Install a vent in the condensate line of anyapplication that may allow dirt or air to collect in the line. Con-sider the following:• Always install a vent where an application requires along horizontal run.• Always install a vent where large units are workingagainst higher external static pressure and to allowproper drainage for multiple units connected to the samecondensate main.• Be sure to support the line where anticipated sagging fromthe condensate or when “double trapping” may occur.• If condensate pump is present on unit, be sure drain con-nections have a check valve to prevent back flow of con-densate into other units.Step 7 — Pipe Connections — Depending on theapplication, there are 3 types of WSHP piping systems tochoose from: water loop, ground-water and ground loop. Referto Piping Section of Carrier System Design Manual for addi-tional information.All WSHP units use low temperature soldered female pipethread fittings for water connections to prevent annealing andout-of-round leak problems which are typically associated withhigh temperature brazed connections. Refer to Table 1 for con-nection sizes. When making piping connections, consider thefollowing:• Use a backup wrench when making screw connections tounit to prevent internal damage to piping.• Insulation may be required on piping to avoid condensa-tion in the case where fluid in loop piping operates attemperatures below dew point of adjacent air.• Piping systems that contain steel pipes or fittings maybe subject to galvanic corrosion. Dielectric fittings maybe used to isolate the steel parts of the system to avoidgalvanic corrosion.WATER LOOP APPLICATIONS — Water loop applicationsusually include a number of units plumbed to a common pip-ing system. Maintenance to any of these units can introduce airinto the piping system. Therefore, air elimination equipmentcomprises a major portion of the mechanical room plumbing.The flow rate is usually set between 2.25 and 3 gpm per tonof cooling capacity. For proper maintenance and servicing,pressure-temperature (P/T) ports are necessary for temperatureand flow verification.In addition to complying with any applicable codes, consid-er the following for system piping:• Piping systems using water temperatures below 50 Frequire 1/2-in. closed cell insulation on all piping surfacesto eliminate condensation.• Avoid all plastic to metal threaded fittings due to thepotential to leak. Use a flange fitted substitute.• Teflon tape thread sealant is recommended to minimizeinternal fouling of the heat exchanger.• Use backup wrench. Do not overtighten connections.• Route piping to avoid service access areas to unit.• Flush the piping system prior to operation to remove dirtand foreign materials from the system.GROUND-LOOP APPLICATIONS — Temperatures be-tween 25 and 110 F and a cooling capacity of 2.25 to 3 gpm offlow per ton is recommended. In addition to complying withany applicable codes, consider the following for system piping:• Limit piping materials to only polyethylene fusion in theburied sections of the loop.• Do not use galvanized or steel fittings at any time due tocorrosion.• Avoid all plastic to metal threaded fittings due to the poten-tial to leak. Use a flange fitted substitute.• Do not overtighten connections.• Route piping to avoid service access areas to unit.• Use pressure-temperature (P/T) plugs to measure flow ofpressure drop.INSTALLATION OF SUPPLY AND RETURN HOSEKIT — Follow these piping guidelines.1. Install a drain valve at the base of each supply and returnriser to facilitate system flushing.2. Install shutoff/balancing valves and unions at each unit topermit unit removal for servicing.3. Place strainers at the inlet of each system circulatingpump.4. Select the proper hose length to allow slack between con-nection points. Hoses may vary in length by +2% to –4%under pressure.5. Refer to Table 2. Do not exceed the minimum bend radiusfor the hose selected. Exceeding the minimum bend radi-us may cause the hose to collapse, which reduces waterflow rate. Install an angle adapter to avoid sharp bendsin the hose when the radius falls below the requiredminimum.NOTE: Piping must comply with all applicable codes.Table 2 — Metal Hose Minimum Bend RadiiHOSE DIAMETER (in.) MINIMUM BEND RADII (in.)1 / 2 2 1 / 23 / 4 41 5 1 / 2NOTE: Trap should be deep enough to offset maximum unit staticdifference. A 4-in. trap is recommended.Fig. 10 — Trap Condensate Draina50-6261tfAlternateCondensateLocationVent1/4” per footslope to drain3/4” Copper FPT/PVCWaterConnections1/2”1/2”3/4” PVCNOTE: Unit does not need to be sloped toward drain.Fig. 11 — Vertical Condensate Connection