Manuals / Carrier / Household Appliance / Air Conditioner

Carrier 37HS specifications

Models: 37HS

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VAV HEATING AND COOLING WITH ELECTRIC CHANGEOVER Ð This application uses a CV control pack- age along with a wall-mounted thermostat 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-line between the volume control- ler and the thermostat.

VAV HEATING AND COOLING WITH ELECTRIC CHANGEOVER Ð This application uses a CV control pack- age along with a wall-mounted thermostat 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-line between the volume control- ler and the thermostat.

Refer to Fig. 70-73. In cooling operation, the NO port of the valve opens the control circuit between the volume

controller and the cooling side of the thermostat. Because the NC port is closed, the heating side of the thermostat is locked out of the system. Upon changeover to heating, the solenoid valve is energized. The NO port closes and the NC port is opened, and the control circuit switches to the heat- ing side of the thermostat. Typically, the solenoid valve is wired to activate automatically when the heating system is turned on, although it may be operated by a simple on/off switch.

Fig. 70 Ð Heating/Cooling Unit Ð Cooling, Cold Air in Duct, Electric Changeover in Cooling,

Thermostat Open, Controller Shut Off, Unit Shut Off

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Carrier 37HS specifications

Contents

System-PoweredControls With 37HS Moduline Air TerminalsStep 1 Ð Determine Air Volume Cfm System-PoweredControls WithBUILDING LOAD CALCULATION Fig. 2 Ð 37HS Unit With VAV ControlsFig. 3 Ð Estimating Block Load Fig. 4 Ð Floor Plan of Typical Zonesfor 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. 6 Ð 35BD Heating Slot Boot Diffuser Fig. 5 Ð Separate Duct Heating SystemPerformance Heating Ð Downblow Slot Fig. 7 Ð Director Diffuser TERMINAL SELECTION AND LAYOUT Table 1 Ð Optimum Outlet DischargeTable 2 Ð Location Guidelines Fig. 10 Ð Moduline Units in Air Series Fig. 9 Ð Single Moduline Unit Connected toSupply Duct Fig. 11 Ð Master Unit and Slave UnitsFig. 14 Ð Diffuser Locations for Step 2 Ð Lay Out TerminalsTable 3 Ð Recommended Maximum Cfm Per Terminal Preferred 2-Wayor One-WayBlow1-Wayand 2-WayBlow, 2-SlotDiffusers Fig. 16 Ð Locate Units to Prevent Down-DraftsTable 4 Ð Air Throw Data Ð Table 5 Ð Air Throw Data ÐStep 3 Ð Consider Unit Combinations And Run Fig. 17 Ð Staggered UnitsFig. 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 7 Ð 37HS2 Units in Air Series cont Table 8 Ð 37HS4 Units in Air SeriesTable 8 Ð 37HS4 Units in Air Series cont Table 9 Ð Maximum Cfm Through the Inlet Collar of a Single Unit or of Units in Air Series0.97+ 0.16 = 1.13 in. wg Controls and Standard Diffusers Master Unit Ð Units with System-PoweredTable 10 Ð Minimum Static Pressure at Control Fig. 23 Ð Three 37HS2 ModulineAir Series on One Controller Fig. 25 Ð Flexible Duct Used with 90-DegreeBendTable 13 Ð Maximum Number of Units in an Fig. 26 Ð Air Intake on Master UnitFig. 27 Ð Location of Volume Controller on Single UnitPage The corrected layout Fig. 30 Ð Corrected LayoutFig. 31 Ð Control Tubing Connection 1.Room A has its own controllerTHE MODULINE VALVE UNIT MODULATING Ð BELLOWS PARTIALLY INFLATED Fig. 32 Ð Bellows and Unit Air Valve ArrangementUNIT SHUTOFF Ð BELLOWS FULLY INFLATED UNIT FULL CAPACITY Ð BELLOWS DEFLATEDFig. 33 Ð Cross Section of 37HS Moduline Air Terminal Fig. 34 Ð Bellows ComparisonSystem-PoweredControls CONTROL APPLICATIONSFig. 35 Ð High and Low Pressure Pick-UpTubes Fig. 36 Ð 37HS Control Components Fig. 37 Ð Basic 37HS Control OperationFig. 41 Ð Wall-MountedThermostat Fig. 39 Ð 37HS Air¯ow Volume ControllerFig. 42 Ð Diffuser Baffle Assembly Fig. 38 Ð 37HS Control Filter/ManifoldFig. 44 Ð Variable Air Volume Control Arrangement Fig. 43 Ð Constant Volume Control ArrangementSystem-Powered Warm-Up Fig. 45 Ð VAV Control Arrangement forFig. 49 Ð VAV Control Arrangement Fig. 47 Ð Cooling/Heating Wall ThermostatFig. 48 Ð Wall-MountedHeating Thermostat for Electric Warm-UpElectric Heat Interlock Pneumatic Warm-UpSwitchFig. 51 Ð VAV Control Arrangement with Fig. 52 Ð Pilot Valve for Pneumatic SequencedCONTROL SELECTION Table 14 Ð Control IndexTable 15 Ð 37HS Control Combinations Table 15 Ð 37HS Control Combinations cont Table 15 Ð 37HS Control Combinations cont CONTROLTable 15 Ð 37HS Control Combinations cont CONTROLSystem-PoweredControls CONTROL OPERATING SEQUENCESFig. 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. 77 Ð Piping Diagram, Heating/Cooling Fig. 75 Ð Piping Diagram, Heating/CoolingFig. 76 Ð Sequence Diagram Ð DA Thermostat Fig. 78 Ð Sequence Diagram, RA ThermostatFig. 81 Ð Piping Diagram, NC Conguration Fig. 79 Ð Piping Diagram, NO CongurationWarm-UpSwitch LEGEND FOR FIG. 79 -AIRFLOW ADJUSTMENT CFM HK08ZZ030Table 17 Ð Multiple Unit Air¯ow Variation AIR DISTRIBUTION Fig. 86 Ð Typical Room Air Distribution Pattern 37HS Ð 2-WAYBLOW 37HS2 Ð ONE-WAYBLOWPage 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 Table 25 Ð Air Throw Data Ð Table 24 Ð Air Throw Data Ð1-Wayand 2-WayBlow, 2-SlotDiffusers 2-Wayand 1-WayDirector, 3-SlotDiffusersPage Copyright 1991 Carrier Corporation