Manuals / Carrier / Household Appliance / Air Conditioner

Carrier specifications Ð Cross Section of 37HS Moduline, Air Terminal Ð Bellows Comparison

Models: 37HS

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Fig. 33 Ð Cross Section of 37HS Moduline

HIGH AND LOW PRESSURE Ð As primary air ¯ows from the unit plenum to the unit air valve and from there to the conditioned space, it passes through a slotted plate called the distribution baffle. The resistance of the baffle tends to ``even out'' the air¯ow through the unit. The baffle also cre- ates a pressure differential which forms the basis of the sens- ing side of the unit control.

Static pressure from above the baffle is called the high pressure; static pressure below the baffle is the low pressure. Figure 35 shows the pick-up tubes for the high and low pres- sures, the differential pressure across the distribution baffle.

Fig. 33 Ð Cross Section of 37HS Moduline

Air Terminal

Fig. 34 Ð Bellows Comparison

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Carrier specifications Ð Cross Section of 37HS Moduline, Air Terminal Ð Bellows Comparison

Contents

System-PoweredControls With 37HS Moduline Air TerminalsStep 1 Ð Determine Air Volume Cfm System-PoweredControls WithFig. 2 Ð 37HS Unit With VAV Controls BUILDING LOAD CALCULATIONFig. 4 Ð Floor Plan of Typical Zones Fig. 3 Ð Estimating Block Loadfor Single-StoryOffice Building DESIGN PROCEDURE with example Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page ·Baseboard ·Overhead air Fig. 5 Ð Separate Duct Heating System Fig. 6 Ð 35BD Heating Slot Boot DiffuserPerformance Heating Ð Downblow Slot Fig. 7 Ð Director Diffuser Table 1 Ð Optimum Outlet Discharge TERMINAL SELECTION AND LAYOUTTable 2 Ð Location Guidelines Fig. 11 Ð Master Unit and Slave Units Fig. 9 Ð Single Moduline Unit Connected toSupply Duct Fig. 10 Ð Moduline Units in Air SeriesPreferred 2-Wayor One-WayBlow Step 2 Ð Lay Out TerminalsTable 3 Ð Recommended Maximum Cfm Per Terminal Fig. 14 Ð Diffuser Locations forTable 5 Ð Air Throw Data Ð Fig. 16 Ð Locate Units to Prevent Down-DraftsTable 4 Ð Air Throw Data Ð 1-Wayand 2-WayBlow, 2-SlotDiffusersFig. 17 Ð Staggered Units Step 3 Ð Consider Unit Combinations And RunFig. 18 Ð Unit Spacing Fig. 19 Ð Run-OutDuct for Single Moduline Unit Table 6 Ð 37HS1 Units in Air Series Table 6 Ð 37HS1 Units in Air Series cont Table 7 Ð 37HS2 Units in Air Series Table 8 Ð 37HS4 Units in Air Series Table 7 Ð 37HS2 Units in Air Series contTable 8 Ð 37HS4 Units in Air Series cont of a Single Unit or of Units in Air Series Table 9 Ð Maximum Cfm Through the Inlet Collar0.97+ 0.16 = 1.13 in. wg Fig. 23 Ð Three 37HS2 Moduline Master Unit Ð Units with System-PoweredTable 10 Ð Minimum Static Pressure at Control Controls and Standard DiffusersFig. 26 Ð Air Intake on Master Unit Fig. 25 Ð Flexible Duct Used with 90-DegreeBendTable 13 Ð Maximum Number of Units in an Air Series on One Controlleron Single Unit Fig. 27 Ð Location of Volume ControllerPage 1.Room A has its own controller Fig. 30 Ð Corrected LayoutFig. 31 Ð Control Tubing Connection The corrected layoutTHE MODULINE VALVE UNIT FULL CAPACITY Ð BELLOWS DEFLATED Fig. 32 Ð Bellows and Unit Air Valve ArrangementUNIT SHUTOFF Ð BELLOWS FULLY INFLATED UNIT MODULATING Ð BELLOWS PARTIALLY INFLATEDAir Terminal Fig. 34 Ð Bellows Comparison Fig. 33 Ð Cross Section of 37HS ModulineCONTROL APPLICATIONS System-PoweredControlsFig. 35 Ð High and Low Pressure Pick-UpTubes Fig. 37 Ð Basic 37HS Control Operation Fig. 36 Ð 37HS Control ComponentsFig. 38 Ð 37HS Control Filter/Manifold Fig. 39 Ð 37HS Air¯ow Volume ControllerFig. 42 Ð Diffuser Baffle Assembly Fig. 41 Ð Wall-MountedThermostatFig. 45 Ð VAV Control Arrangement for Fig. 43 Ð Constant Volume Control ArrangementSystem-Powered Warm-Up Fig. 44 Ð Variable Air Volume Control Arrangementfor Electric Warm-Up Fig. 47 Ð Cooling/Heating Wall ThermostatFig. 48 Ð Wall-MountedHeating Thermostat Fig. 49 Ð VAV Control ArrangementFig. 52 Ð Pilot Valve for Pneumatic Sequenced Pneumatic Warm-UpSwitchFig. 51 Ð VAV Control Arrangement with Electric Heat InterlockTable 14 Ð Control Index CONTROL SELECTIONTable 15 Ð 37HS Control Combinations Table 15 Ð 37HS Control Combinations cont CONTROL Table 15 Ð 37HS Control Combinations contCONTROL Table 15 Ð 37HS Control Combinations contCONTROL OPERATING SEQUENCES System-PoweredControlsFig. 55 Ð Variable Volume Controls Schematic Unit Supplying Air Controller Shut Off, Unit Shut Off Controller Bleeding, Unit Heating VAV HEATING AND COOLING WITH SYSTEM- POWERED CHANGEOVER Ð This application uses a CV control package along with a wall-mountedthermostat pack- age cooling/heating and a system-poweredchangeover con- trol package. The cooling thermostat is direct acting DA while the heating thermostat is reverse acting RA Fig. 62 Ð Heating/Cooling Unit Ð Cooling, Cold Air in Duct, Changeover in Cooling Fig. 64 Ð Heating/Cooling Unit Ð Cooling, Cold Air in Duct, Changeover in Cooling VAV HEATING Ð It is suggested that the following section be reviewed before reading this section: VAV Cooling, page System-PoweredControls with Electric Interface Controller Bleeding, Unit Heating VAV HEATING AND COOLING WITH ELECTRIC CHANGEOVER Ð This application uses a CV control pack- age along with a wall-mountedthermostat package cooling/ heating and an electric changeover package. The change- over valve permits control of the unit to be switched between the cooling and heating sides of a cooling/heating thermo- stat. It is eld-installed in-linebetween the volume control- ler and the thermostat Fig. 71 Ð Heating/Cooling Unit Ð Heating, Hot Air in Duct, Electric Changeover in Heating Fig. 74 Ð Connection for Electric Interlock Fig. 78 Ð Sequence Diagram, RA Thermostat Fig. 75 Ð Piping Diagram, Heating/CoolingFig. 76 Ð Sequence Diagram Ð DA Thermostat Fig. 77 Ð Piping Diagram, Heating/CoolingLEGEND FOR FIG. 79 - Fig. 79 Ð Piping Diagram, NO CongurationWarm-UpSwitch Fig. 81 Ð Piping Diagram, NC CongurationAIRFLOW ADJUSTMENT HK08ZZ030 CFMTable 17 Ð Multiple Unit Air¯ow Variation AIR DISTRIBUTION 37HS Ð 2-WAYBLOW 37HS2 Ð ONE-WAYBLOW Fig. 86 Ð Typical Room Air Distribution PatternPage Table 18 Ð Standard Diffusers for 37HS1 Table 19 Ð Standard Diffusers for 37HS2 Table 20 Ð Standard Diffusers for 37HS4 Table 21 Ð Optional Diffusers for 37HS1 Table 22 Ð Optional Diffusers for 37HS2 Table 23 Ð Optional Diffusers for 37HS4 2-Wayand 1-WayDirector, 3-SlotDiffusers Table 24 Ð Air Throw Data Ð1-Wayand 2-WayBlow, 2-SlotDiffusers Table 25 Ð Air Throw Data ÐPage Copyright 1991 Carrier Corporation