Manuals / Carrier / Household Appliance / Air Conditioner

Carrier 37HS specifications Cfm, HK08ZZ030, Ð Multiple Unit Air¯ow Variation

Models: 37HS

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% CFM 120

S O

OPEN

S O

MINIMUM CFM

STAR WHEEL

% CFM 120

100

	HK08ZZ030
40
80

%

CFM 120

100

40 80

MAXIMUM CFM LEVER

VOLUME CONTROLLER

Fig. 84 Ð Minimum and Maximum Air¯ow Adjustments, 37HS Controller

Variation in Maximum Air¯ow Ð As explained in the Terminal Selection and Layout section, Moduline units in air series can be controlled individually with a volume controller at each unit, or with a master/slave combination, where one controller is used with multiple units. All the units on one controller must be of the same model (capacity).

In master/slave combinations, some variation in maxi- mum air¯ow among the terminals in air series will occur. The variation in maximum air¯ow is a function of the unit plenum size, the model, and the number of units in an air series on one controller. Table 17 shows the expected varia- tion from the unit with the smallest air¯ow to the unit with the largest air¯ow.

For single units with controller, the cfm variation from the lever setting is ± 10%.

Table 17 Ð Multiple Unit Air¯ow Variation

		APPROXIMATE AIRFLOW VARIATION (Cfm)
	PLENUM	LOWEST UNIT TO HIGHEST UNIT IN AIR SERIES*
MODEL	PLENUM		Number of Units in Air Series On
MODEL	SIZE (in.)		Number of Units in Air Series On
				One Controller
		2		3	4	5
	7 x 7	10		15	20	Ð
37HS1	9 x 9	10		15	20	25
	11 x 11	10		15	20	25
	7 x 7	20		Ð	Ð	Ð
37HS2	9 x 9	20		30	40	Ð
	11 x 11	20		30	40	Ð
	9 x 9	40		Ð	Ð	Ð
37HS4	11 x 11	40		60	Ð	Ð
	13 x 13	40		60	80	Ð

*Values shown are based on a typical short, straight duct run be- tween units. Variation shown may be affected if there are excessive duct pressure losses between units.

NOTE: The variation value shown in Table 17 for a given number of units of a certain model size (capacity) is the same for all size ple- nums used in an air series of recommended combinations for that model size. Thus, 3 units of model size 37HS2, plenum size 9 x 9, will have a maximum variation of 30 cfm; 3 units, plenum sizes 9 x 9 (2) and 7 x 7 (1) will also have a maximum variation of 30 cfm. A dash indicates that the quantity of a particular plenum size is not recom- mended in air series for that unit size.

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Carrier 37HS specifications Cfm, HK08ZZ030, Ð Multiple Unit Air¯ow Variation

Contents

37HS Moduline Air Terminals Step 1 Ð Determine Air Volume CfmSystem-PoweredControls With 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. 9 Ð Single Moduline Unit Connected to Supply DuctFig. 10 Ð Moduline Units in Air Series Fig. 11 Ð Master Unit and Slave UnitsStep 2 Ð Lay Out Terminals Table 3 Ð Recommended Maximum Cfm Per TerminalFig. 14 Ð Diffuser Locations for Preferred 2-Wayor One-WayBlowFig. 16 Ð Locate Units to Prevent Down-Drafts Table 4 Ð Air Throw Data Ð1-Wayand 2-WayBlow, 2-SlotDiffusers 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 Master Unit Ð Units with System-Powered Table 10 Ð Minimum Static Pressure at ControlControls and Standard Diffusers Fig. 23 Ð Three 37HS2 ModulineFig. 25 Ð Flexible Duct Used with 90-DegreeBend Table 13 Ð Maximum Number of Units in anAir Series on One Controller Fig. 26 Ð Air Intake on Master UnitFig. 27 Ð Location of Volume Controller on Single UnitPage Fig. 30 Ð Corrected Layout Fig. 31 Ð Control Tubing ConnectionThe corrected layout 1.Room A has its own controllerTHE MODULINE VALVE Fig. 32 Ð Bellows and Unit Air Valve Arrangement UNIT SHUTOFF Ð BELLOWS FULLY INFLATEDUNIT MODULATING Ð BELLOWS PARTIALLY 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. 39 Ð 37HS Air¯ow Volume Controller Fig. 42 Ð Diffuser Baffle AssemblyFig. 41 Ð Wall-MountedThermostat Fig. 38 Ð 37HS Control Filter/ManifoldFig. 43 Ð Constant Volume Control Arrangement System-Powered Warm-UpFig. 44 Ð Variable Air Volume Control Arrangement Fig. 45 Ð VAV Control Arrangement forFig. 47 Ð Cooling/Heating Wall Thermostat Fig. 48 Ð Wall-MountedHeating ThermostatFig. 49 Ð VAV Control Arrangement for Electric Warm-UpPneumatic Warm-UpSwitch Fig. 51 Ð VAV Control Arrangement withElectric Heat Interlock 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. 75 Ð Piping Diagram, Heating/Cooling Fig. 76 Ð Sequence Diagram Ð DA ThermostatFig. 77 Ð Piping Diagram, Heating/Cooling Fig. 78 Ð Sequence Diagram, RA ThermostatFig. 79 Ð Piping Diagram, NO Conguration Warm-UpSwitchFig. 81 Ð Piping Diagram, NC Conguration 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 24 Ð Air Throw Data Ð 1-Wayand 2-WayBlow, 2-SlotDiffusersTable 25 Ð Air Throw Data Ð 2-Wayand 1-WayDirector, 3-SlotDiffusersPage Copyright 1991 Carrier Corporation