Carrier OMNIZONE 50BV020-064 Installation And Service Instructions Manual

Also see for OMNIZONE 50BV020: Operating and troubleshooting guide

Contents

23Table 6A — Hot Water Pressure Drop50BVC,E,J,K,Q UnitsLEGENDTable 6B — Hot Water Pressure Drop50BVT,U,V,W,X UnitsLEGENDPipe sizes should be selected based on the head pressureavailable from the pump. Water velocity should not exceed8 fps. Design the piping system for approximately 3 ft of lossper 100 equivalent ft of pipe. The piping system should allowfor expansion and minimize vibration between the unit andpiping system.WATER ECONOMIZER (Optional) — The optional watersideeconomizer (pre-cooling coil) is factory-installed and piped inter-nally, in series with the condenser water circuit (Fig. 21). A divert-ing valve and factory controls are included with the option. Onlyone set of field connections needs to be made for condenser waterand economizer water. In addition, when the unit is shipped withthe economizer option, the economizer drain must be connectedto a separate trap. Follow the same steps for the economizer drainas described for the evaporator condensate drain. An Aquastat isused to modulate water flow through the economizer. The control-ler is mounted to the low voltage control box. Electrical connec-tions are factory installed and wired. The remote bulb is shippedinternal to the unit and requires field mounting. Care should betaken not to dent the bulb or miscalibration may occur. TheAquastat has a temperature range adjustment (–30 F to 100 F) andis field set. See Fig. 2-14 for connection locations and sizes. SeeTables 7A and 7B for economizer waterside pressure drop data.The waterside economizer can also be ordered withoutfactory-installed piping or controls. This offers additionalflexibility for specific applications. In this case, the coil isfactory mounted, but all supply and return piping and controlsare field supplied.Table 7A — Economizer Pressure Drop Curve(ft wg), 50BVC,E,J,K,Q UnitsLEGENDFLOW RATE(gpm)SIZE 020 SIZE 024 SIZE 028 SIZE 034Pressure Drop (ft wg)10 0.7 0.7 0.7 —15 1.5 1.5 1.5 —20 2.6 2.6 2.6 —25 4.0 4.0 4.0 —30 5.8 5.8 5.8 0.135 7.8 7.8 7.8 0.140 10.2 10.2 10.2 0.145 12.9 12.9 12.9 0.250 15.8 15.8 15.8 0.255 — — — 0.360 — — — 0.365 — — — 0.4GPM — Flow RatePD — Pressure Drop (ft wg)FLOW RATE(gpm)SIZE 034 SIZE 044 SIZE 054 SIZE 064Pressure Drop (ft wg)45 2.4 — — —50 3.0 — — —55 3.6 — — —60 4.3 — — —65 5.0 — — —70 5.7 — — —75 6.6 — — —80 7.4 — — —85 8.4 — — —90 9.3 2.5 2.5 2.5100 — 3.1 3.1 3.1110 — 3.7 3.7 3.7120 — 4.4 4.4 4.4130 — 5.1 5.1 5.1140 — 5.9 5.9 5.9150 — 6.7 6.7 6.7160 — 7.6 7.6 7.6170 — 8.6 8.6 8.6180 — 9.6 9.6 9.6GPM — Flow RatePD — Pressure Drop (ft wg)FLOW RATE(gpm)SIZE 020 SIZE 024 SIZE 028 SIZE 034Pressure Drop (ft wg)35 8.9 — — —40 11.5 11.0 — —45 14.4 13.8 — —50 17.6 16.9 16.9 —55 21.1 20.4 20.4 —60 24.9 24.1 24.1 3.565 29.0 28.1 28.2 4.170 34.4 32.5 32.5 4.775 — 37.1 37.2 5.480 — 42.1 42.1 6.185 — — 47.4 6.990 — — 52.9 7.795 — — 58.7 8.5100 — — 64.9 9.4105 — — — 10.3110 — — — 11.3115 — — — 12.3120 — — — 13.4GPM — Flow RatePD — Pressure Drop (ft wg)motorFLUID INN.O.AQUASTATMBV“BULB STRAPPEDTO FLUID” IN LINE(FIELD INSTALLED)N.O.N.C.3-WAY MOTORIZEDBALL VALVEWATERSIDEECONOMIZERCOILFLUID TO REFRIGERANTHEAT EXCHANGERPOSITIVE SHUT-OFF SOLENOIDVALVE FOR VARIABLE SPEEDPUMPING SYSTEM(FIELD INSTALLED)Fig. 21 — Optional Water Economizera50-7269ef