Manuals / Carrier / Household Appliance / Air Conditioner

Carrier 37HS specifications The Moduline Valve

Models: 37HS

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Final Layout Ð After these 4 steps are complete, you are ready to make a ®nal layout.

The ®nal layout should show not only the number and lo- cation of the Moduline units, but also:

·the round duct size connected to the unit

·the controller location

·the control tube layout for connecting the master unit (with thermostat) to all its slaves

·the cfm for the master unit (all slaves will be the same cfm and need not be indicated)

·the model number of the unit to be used

THE MODULINE VALVE

The Moduline Control Concept Ð The 37HS Modu- line system-powered control concept is based on using the building's primary air supply as a source of energy. The dis- tribution duct pressure provides energy to operate the con- trols that modulate the ¯ow of air through the unit. The heart of this system is a bellows-operated unit air valve, which is positioned by varying the pressure of the air in the bellows relative to the supply air pressure in the duct. As the pres- sure in the bellows approaches the pressure in the supply duct, the unit air valve opening is reduced, ®nally closing completely when the pressures are equal.

Figure 32 shows the Moduline terminal in cross section with the valve in three positions Ð shutoff, partially open and fully open. The valve opening varies with the pressure of the bellows and the pressure of the plenum.

Figure 33 shows the internal components of the Moduline unit.

Figure 34 shows the comparison of operating character- istics between Carrier's new Moduline unit (the 37HS) and the previous design.

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Carrier 37HS specifications The Moduline Valve

Contents

Step 1 Ð Determine Air Volume Cfm 37HS Moduline Air TerminalsSystem-PoweredControls With System-PoweredControls WithFig. 2 Ð 37HS Unit With VAV Controls BUILDING LOAD CALCULATIONfor Single-StoryOffice Building Fig. 3 Ð Estimating Block LoadFig. 4 Ð Floor Plan of Typical Zones DESIGN PROCEDURE with example Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page ·Baseboard ·Overhead air Performance Heating Ð Downblow Slot Fig. 6 Ð 35BD Heating Slot Boot DiffuserFig. 5 Ð Separate Duct Heating System Fig. 7 Ð Director Diffuser Table 2 Ð Location Guidelines TERMINAL SELECTION AND LAYOUTTable 1 Ð Optimum Outlet Discharge Supply Duct Fig. 9 Ð Single Moduline Unit Connected toFig. 10 Ð Moduline Units in Air Series Fig. 11 Ð Master Unit and Slave UnitsTable 3 Ð Recommended Maximum Cfm Per Terminal Step 2 Ð Lay Out TerminalsFig. 14 Ð Diffuser Locations for Preferred 2-Wayor One-WayBlowTable 4 Ð Air Throw Data Ð Fig. 16 Ð Locate Units to Prevent Down-Drafts1-Wayand 2-WayBlow, 2-SlotDiffusers Table 5 Ð Air Throw Data ÐFig. 18 Ð Unit Spacing Step 3 Ð Consider Unit Combinations And RunFig. 17 Ð Staggered Units 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 Table 10 Ð Minimum Static Pressure at Control Master Unit Ð Units with System-PoweredControls and Standard Diffusers Fig. 23 Ð Three 37HS2 ModulineTable 13 Ð Maximum Number of Units in an Fig. 25 Ð Flexible Duct Used with 90-DegreeBendAir Series on One Controller Fig. 26 Ð Air Intake on Master Uniton Single Unit Fig. 27 Ð Location of Volume ControllerPage Fig. 31 Ð Control Tubing Connection Fig. 30 Ð Corrected LayoutThe corrected layout 1.Room A has its own controllerTHE MODULINE VALVE UNIT SHUTOFF Ð BELLOWS FULLY INFLATED Fig. 32 Ð Bellows and Unit Air Valve ArrangementUNIT MODULATING Ð BELLOWS PARTIALLY INFLATED UNIT FULL CAPACITY Ð BELLOWS DEFLATEDAir Terminal Fig. 34 Ð Bellows Comparison Fig. 33 Ð Cross Section of 37HS ModulineFig. 35 Ð High and Low Pressure Pick-UpTubes System-PoweredControlsCONTROL APPLICATIONS Fig. 37 Ð Basic 37HS Control Operation Fig. 36 Ð 37HS Control ComponentsFig. 42 Ð Diffuser Baffle Assembly Fig. 39 Ð 37HS Air¯ow Volume ControllerFig. 41 Ð Wall-MountedThermostat Fig. 38 Ð 37HS Control Filter/ManifoldSystem-Powered Warm-Up Fig. 43 Ð Constant Volume Control ArrangementFig. 44 Ð Variable Air Volume Control Arrangement Fig. 45 Ð VAV Control Arrangement forFig. 48 Ð Wall-MountedHeating Thermostat Fig. 47 Ð Cooling/Heating Wall ThermostatFig. 49 Ð VAV Control Arrangement for Electric Warm-UpFig. 51 Ð VAV Control Arrangement with Pneumatic Warm-UpSwitchElectric Heat Interlock Fig. 52 Ð Pilot Valve for Pneumatic SequencedTable 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. 76 Ð Sequence Diagram Ð DA Thermostat Fig. 75 Ð Piping Diagram, Heating/CoolingFig. 77 Ð Piping Diagram, Heating/Cooling Fig. 78 Ð Sequence Diagram, RA ThermostatWarm-UpSwitch Fig. 79 Ð Piping Diagram, NO CongurationFig. 81 Ð Piping Diagram, NC Conguration LEGEND FOR FIG. 79 -AIRFLOW ADJUSTMENT Table 17 Ð Multiple Unit Air¯ow Variation CFMHK08ZZ030 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 1-Wayand 2-WayBlow, 2-SlotDiffusers Table 24 Ð Air Throw Data ÐTable 25 Ð Air Throw Data Ð 2-Wayand 1-WayDirector, 3-SlotDiffusersPage Copyright 1991 Carrier Corporation