Carrier 37HS manual

Application Data CONTENTS Page INTRODUCTION ........................... 1 - 2 BUILDING LOAD CALCULA TION .......... 2-23 Cooling ................................... 2 • LOAD CONSIDERA TIONS • DESIGN PROCEDURE Heating ................................... 2 0 • OVERHEAD AIR HEA TING TERMINAL SELECTION AND LA YOUT ..... 23-41 Introduction .......[...]

ceiling designs and building control systems. Moduline t ter- minals installed in modular ceilings can be moved easily when tenant requirements change, and the quiet, linear slot distri- bution integrates well in most commercial ceilings. Figure 2 shows a 37HS Moduline unit with variable air volume (V A V) controls. The basic Moduline terminal cont[...]

LOAD CONSIDERA TIONS Lighting — Even though lighting loads (W atts/sq ft) are con- siderably lower in today’ s buildings, the lighting is by far the largest load component. It is necessary , therefore, to pay close attention to getting an accurate estimate of the lighting requirements. In estimating the lighting load, special consideration shou[...]

Supply Air T emperature — In systems using draw-thru air handling units and high induction Carrier Moduline t termi- nal units, the acceptable range of supply air temperatures at the terminals is from 50 to 54 F . The cooling coil ADP (Ap- paratus Dew Point) will be from 3 to 5° F lower than the supply air temperature, due to allowance for coil [...]

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Moduline t Selection (Analysis of Data) — The printout shown below presents an analysis of the preceding data. Heating — Heat must be provided in a building to of fset losses through the perimeter walls, windows, and roof. In the interior spaces the heat gain from lights and people will in many cases be enough to cause a cooling load even in wi[...]

Fig. 5 — Separate Duct Heating System Performance Heating — Downblow Slot NOMINAL LENGTH (ft) 24 TYPE DIFFUSER Cfm Placement (in.) Cfm Placement (in.) Min Max Min Max Heating Slot Boot Diffuser 20-70 12 24 25-120 12 24 NOTES: 1. Minimum and maximum show distance diffuser should be lo- cated from perimeter wall in inches. 2. For optimum performa[...]

Changeover Moduline t Heating/Cooling — Both hot air and cold air distribution are possible with a Moduline system. The Moduline unit uses a director dif fuser which, sensing the duct temperature of the supply air , directs the air towards or away from the perimeter wall. (Fig. 7.) The Moduline location for heating and cooling requires the unit t[...]

Additional Guidelines for Heating — In addition to down- blow slot boot dif fusers and Moduline director dif fusers, round nozzles spaced along the perimeter wall will also provide satisfactory overhead heating distribution. Some guidance for outlet use are shown in T ables 1 and 2. Moduline heating and cooling is less flexible than sepa- rate d[...]

CONTROL END — The control end of a Moduline t unit is the end containing a control block at the end plate of the valve section of the unit. (Fig. 12.) The end of the unit op- posite the control end contains a blank block. The control end of the Moduline unit is at the longer of the dif fuser pro- jections from the plenum. In Fig. 13, the longer p[...]

As a result, slightly higher maximum cfm per unit is al- lowed as compared to interior zones or the north perimeter , which have relatively constant loads. The maximum cfm per unit also is af fected by the desired sound level in the room and the type of use of the space. For example, an executive of f ice uses low sound levels but the furnishings g[...]

EV ALUA TE THE THROW OF MODULINE t UNITS IN POSSIBLE LOCA TIONS — Check minimum throw for 2-way blow dif fuser near walls and all one-way blow dif fusers. Exceeding maximum throw is almost never a problem. A 2-way blow unit covers 50 ft at nominal cfm. In perimeter rooms, if 2-way blow units are of f center , favor the exterior wall if possible. [...]

ST AGGER SP ACING — A frequently used layout method is to stagger the units. This arrangement gives good cover - age, solves the problem of drafts when units blow at each other , and is low cost. It also gives good flexibility for future partition changes. (Fig. 17.) MAXIMUM UNIT SP ACING — Interior zones use less air , as low as 0.4 to 0.6 cf[...]

Fig. 19 — Run-Out Duct for Single Moduline T Unit Fig. 20 — Run-Out Duct for Moduline Units in Air Series 28[...]

T able 6 — 37HS1 Units in Air Series 29[...]

T able 6 — 37HS1 Units in Air Series (cont) 30[...]

T able 7 — 37HS2 Units in Air Series 31[...]

T able 7 — 37HS2 Units in Air Series (cont) T able 8 — 37HS4 Units in Air Series 32[...]

T able 8 — 37HS4 Units in Air Series (cont) 33[...]

T able 9 — Maximum Cfm Through the Inlet Collar of a Single Unit or of Units in Air Series MODEL PLENUM SIZE (in.) INLET COLLAR DIAM (in.) MAXIMUM TOT AL AIRFLOW (Cfm) 37HS1 5x7 4 1 1 0 7x7 6 4 0 0 9x9 8 8 0 0 1 1x1 1 1 0 1 1 0 0 37HS2 7x7 6 4 0 0 9x9 8 8 0 0 1 1x1 1 1 0 1 1 0 0 37HS4 9x9 8 8 0 0 1 1x1 1 1 0 1 1 0 0 13 x 13 12 1600 In general, un[...]

FLEX DUCT IN AIR SERIES — Flexible duct is often used in air series to connect Moduline t units. In calculating pres- sure requirements for units in air series, use the following guidelines: 1. For close-coupled units (either continuous dif fuser or units in adjoining ceiling modules) where the flexible duct used is 6 to 8 in. in length, add 0.1[...]

T able 10 — Minimum Static Pressure at Control (Master) Unit — Units with System-Powered Controls and Standard Diffusers AIRFLOW (Cfm) 37HS1 37HS2 37HS4 PLENUM SIZE (in.) 7x7 7x7 9x9 5x7 9x9 9x9 1 1x1 1 1 1x1 1 1 1x1 1 1 3x1 3 Minimum Static Pressure (in. wg) 40 0.75 0.75 N/A N/A 50 60 70 80 0.75 0.75 0.75 N/A 90 100 11 0 0.90 0.90 0.75 N/A 120[...]

Step 4 — Determine Controller Location — The final step in the terminal selection and layout process is to decide where the controllers will be placed. The temperature control zones in the building will be de- termined by the final partition layout. Before the final par- tition layout has been determined, you must install enough controllers [...]

4. The controller for units in an air series should be located as shown in Fig. 28. 5. V olume controllers for units in an air series must be con- nected from master to slave units in the same air series; they must not be connected to units in a dif ferent air series from that of the master unit. See examples shown in Fig. 29 and 30. 6. T o connect[...]

EXAMPLES OF GUIDELINE USE — Figure 29 shows an incorrect application. Figure 30 shows the corrected layout. An incorrect application: 1. Room A & B units are on the same controller but on different duct air series. 2. Room B calls for half the cfm as in units in room A — not feasible because there is only one controller . 3. Units in room C[...]

The corrected layout: 1. Room A has its own controller . 2. Room B has its own controller . 3. Room C has a correct air series for one control. 4. Room D has the controller in the proper location. Fig. 30 — Corrected Layout Fig. 31 — Control T ubing Connection 40[...]

Final Layout — After these 4 steps are complete, you are ready to make a final layout. The final 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 [...]

UNIT SHUT OFF — BELLOWS FULL Y INFLA TED UNIT MODULA TING — BELLOWS P ARTIALL Y INFLA TED UNIT FULL CAP ACITY — BELLOWS DEFLA TED Fig. 32 — Bellows and Unit Air V alve Arrangement 42[...]

HIGH AND LOW PRESSURE — As primary air flows 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 baf f le. The resistance of the baf f le tends to ‘ ‘even out’ ’ the airflow through the unit. The baf f le also cre- ates a pressure dif ferential whi[...]

BELLOWS PRESSURE — As the airflow through the unit changes, the high and low pressures vary proportionately . Comparing these 2 pressures, the unit volume controller pro- vides a bellows pressure which in turn inflates the unit air valve. Bellows pressure varies from near zero at full flow to plenum or duct pressure at shutof f. UNIT AIRFLOW D[...]

Fig. 36 — 37HS Control Components Fig. 37 — Basic 37HS Control Operation 45[...]

Both CV and V A V control packages include a plastic baffle which is installed over the vertical leg of the center dif fuser and blocks the unused portion of the dif fuser slots. See Fig. 42. On V A V units, this prevents stray air currents from influencing thermostat operation. Other control components used in extended system- powered electric an[...]

SYSTEM-POWERED APPLICA TIONS Constant V olume (CV) Cooling — (Function No. 1.) This is the most basic operating configuration. The control arrange- ment consists of the volume controller and the filter . The unit maintains a steady flow of primary air at the quantity set on the volume controller over a range of supply pressures. Fig- ure 43 sh[...]

V A V Heating and Cooling With Changeover — (Function 5.) A V A V control arrangement for cooling/heating includes a wall-mounted cooling/heating thermostat and provision to change the thermostat from cooling to heating configuration and back again. Figure 46 shows the control arrangement with Moduline t control for heating and cooling. The wall[...]

V A V Cooling W ith Electric Heat Interlock — (Function 8.) In cases where V A V cooling terminals are used in conjunc- tion with a separate heating system, such as perimeter heat- ing, it is necessary to prevent the heating equipment from turning on before the cooling system turns of f. The addition of a dif ferential pressure switch to the unit[...]

NOTE: The following applications require the control pack- ages shown for Function 10, plus field-supplied thermostats as described below . Night Set Back Heating — In the interest of ener gy conser- vation, it may be desirable to raise a system’ s cooling set point during unoccupied time periods, whether they occur at night or on weekends, ho[...]

T able 15 — 37HS Control Combinations NO. FUNCTION MODEL CONTROL CONNECTION ARRANGEMENT P ACKAGES REQUIRED 1 SYSTEM POWERED CONST ANT VOLUME COOLING 37HS1 37HS900003 37HS2 37HS900003 37HS4 37HS900003 2 SYSTEM POWERED V ARIABLE VOLUME COOLING DIFFUSER THERMOST A T 37HS1 37HS900001 37HS2 37HS900002 37HS4 37HS900004 3 SYSTEM POWERED V ARIABLE VOLUME[...]

T able 15 — 37HS Control Combinations (cont) NO. FUNCTION MODEL CONTROL CONNECTION ARRANGEMENT P ACKAGES REQUIRED 4 SYSTEM POWERED V ARIABLE VOLUME COOLING SYSTEM POWERED W ARM-UP W ALL THERMOST A T* 37HS1 37HS900003 37CM900152 37CM901012 37HS2 37HS900003 37CM900152 37CM901012 37HS4 37HS900003 37CM900152 37CM901012 5 SYSTEM POWERED V ARIABLE VOLU[...]

T able 15 — 37HS Control Combinations (cont) NO. FUNCTION MODEL CONTROL CONNECTION ARRANGEMENT P ACKAGES REQUIRED 7 SYSTEM POWERED V ARIABLE VOLUME HEA TING & COOLING ELECTRIC CHANGEOVER W ALL THERMOST A T 37HS1 37HS900003 37CM900792† 37CM900992 37HS2 37HS900003 37CM900792† 37CM900992 37HS4 37HS900003 37CM900792† 37CM900992 8 SYSTEM POW[...]

T able 15 — 37HS Control Combinations (cont) NO. FUNCTION MODEL CONTROL CONNECTION ARRANGEMENT P ACKAGES REQUIRED 10 SYSTEM POWERED V ARIABLE VOLUME COOLING PNEUMA TIC PILOT V AL VE FOR HEA TING/COOLING SEQUENCE PNEUMA TIC W ALL THERMOST A T†† 37HS1 37HS900003 37CM900972 (NO) with 37HS900007 (DA) 37CM900982 (NC) with 37HS900008 (RA) 37HS2 37H[...]

CONTROL OPERA TING SEQUENCES System-Powered Controls CV COOLING — See Fig. 54. Air from above the distri- bution baf f le (high pressure) enters the filter through the up- per port of the control block, while the lower port receives air from below the baf f le (low pressure). These air streams pass through separate filter chambers where particu[...]

V A V COOLING — In V A V operation, the filter and volume controller perform the same functions as in CV operation. The unit-mounted thermostat modifies control operation as described below . Refer to Fig. 55. The air enters the low pressure chamber of the volume controller through a fixed orifice. The low pres- sure chamber is connected thro[...]

Fig. 56 — V ariable V olume Controls — Minimum Flow: Thermostat Partially Open, Controller Partially Open, Unit Delivering Minimum Flow Fig. 57 — V ariable V olume Controls — Full Cooling, Thermostat Closed, Controller Bleeding, Unit Supplying Air 57[...]

V A V COOLING WITH W ARM-UP — Including the warm- fup switch in the volume controller/thermostat circuit al- lows the unit to deliver air when there is warm air in the duct system, even though the cooling thermostat is satisfied by cool space temperature. The warm-up switch is actually a temperature controlled pneumatic valve which is normally o[...]

Fig. 59 — Cooling with W arm-Up — Morning, Hot Air in Duct, Warm-Up Switch Closed, Controller Bleeding, Unit Heating Fig. 60 — Cooling with W arm-Up — Nighttime Condition, Room Cool, Thermostat Open, Bleeding, W arm-Up Open, Controller Shut Off, Unit Shut Of f 59[...]

V A V HEA TING AND COOLING WITH SYSTEM- POWERED CHANGEOVER — This application uses a CV control package along with a wall-mounted thermostat pack- age (cooling/heating) and a system-powered changeover con- trol package. The cooling thermostat is direct acting (DA) while the heating thermostat is reverse acting (RA). Operation is very similar to s[...]

Fig. 62 — Heating/Cooling Unit — Cooling, Cold Air in Duct, Changeover in Cooling, Thermostat Open, Controller Shut Off, Unit Shut Of f Fig. 63 — Heating/Cooling Unit — Heating, Hot Air in Duct, Changeover in Heating, Thermostat Open, Controller Shut Off, Unit Shut Of f 61[...]

Fig. 64 — Heating/Cooling Unit — Cooling, Cold Air in Duct, Changeover in Cooling, Thermostat Closed, Controller Bleeding, Unit Cooling Fig. 65 — Heating/Cooling Unit — Heating, Hot Air in Duct, Changeover in Heating, Thermostat Closed, Controller Bleeding, Unit Heating 62[...]

V A V HEA TING — It is suggested that the following section be reviewed before reading this section: V A V Cooling, page 56. Combining a dif fuser -mounted constant volume control pack- age with a wall-mounted thermostat package (heating only) allows the use of Moduline t units in V A V heating applications. The operation of the heating only ther[...]

System-Powered Controls with Electric Interface V A V COOLING WITH ELECTRIC W ARM-UP — Another approach to warm-up is the addition of an electric warm-up valve; the operating principle is the same as system powered warm-up. A building with its conditioning system shut down during unoccupied hours must be brought close to operating temperature bef[...]

Fig. 68 — Cooling with W arm-Up — Morning, Hot Air in Duct, Warm-Up Switch Closed, Controller Bleeding, Unit Heating Fig. 69 — Cooling with W arm-Up — Nighttime Condition, Room Cool, Thermostat Open, Bleeding, W arm-Up Open, Controller Shut Off, Unit Shut Of f 65[...]

V A V HEA TING AND COOLING WITH ELECTRIC CHANGEOVER — 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 fie[...]

Fig. 71 — Heating/Cooling Unit — Heating, Hot Air in Duct, Electric Changeover in Heating, Thermostat Open, Controller Shut Off, Unit Shut Of f Fig. 72 — Heating/Cooling Unit — Cooling, Cold Air in Duct, Electric Changeover in Cooling, Thermostat Closed, Controller Bleeding, Unit Cooling 67[...]

V A V COOLING WITH ELECTRIC HEA T INTERLOCK — A conditioned space may contain a Moduline system for cool- ing and a separate heating system such as baseboard electric or hot water or an overhead fan coil. The electric interlock switch enables the cooling and heating systems to operate as the load dictates with overlap. The electric interlock swit[...]

System-Powered Controls with Pneumatic Interface PNEUMA TIC SEQUENCED HEA TING/COOLING (HOT W A TER) — By using a 20 psi pneumatic source, one ther- mostat can control both heating and Moduline cooling in the conditioned space. The pneumatic circuit is interfaced with the system-powered circuit by use of a pilot valve. In cool- ing, the Moduline [...]

V A V COOLING WITH PNEUMA TIC W ARM-UP OR FIRE SAFETY SWITCH — Through the use of a specific pneu- matic switch, the functions of pneumatic warm-up and fire safety can be added to Moduline t installations. Pneumatic warm-up of fers an opportunity to open all Modu- line units in an area to allow immediate hot air distribution prior to the buildi[...]

AIRFLOW ADJUSTMENT Each 37HS volume controller is equipped with a maxi- mum cfm lever for setting the required unit airflow in the field. The lever is located at the bottom of the controller . See Fig. 84. The controller has a star wheel located at the top of the controller for setting the minimum airflow . The star wheel is also shown in Fig. 8[...]

V ariation in Maximum Airflow — As explained in the T erminal Selection and Layout section, Moduline t 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)[...]

AIR DISTRIBUTION Linear slot dif fusers are an integral part of the Moduline unit. They provide excellent air distribution for the condi- tioned space. The dif fuser configuration is designed to in- duce room air , creating continuous air motion for occupants of the room and reasonably consistent temperatures from floor to ceiling. Figure 85 shows[...]

37HS — 2-W A Y BLOW 37HS2 — ONE-W A Y BLOW Fig. 86 — T ypical Room Air Distribution Pattern 74[...]

Fig. 87 — Slot Openings in Standard and Optional Diffusers 75[...]

T able 18 — Standard Diffusers for 37HS1 UNIT DESIGNA TION CONFIGURA TION FLOW MA TERIAL MODE LENGTH CEILING MODEL (in.) TYPE 37HS1 HS 2-W ay Alum Cooling 23 T -Bar 47 22.92 T egular T -Bar 46.92 24 Continuous T -Bar 48 23.38 Narrow T -Bar 47.38 1 174 mm Metric 1200 mm One-W ay Alum Cooling 23 T -Bar 47 22.92 T egular T -Bar 46.92 24 Continuous T[...]

T able 19 — Standard Diffusers for 37HS2 UNIT DESIGNA TION CONFIGURA TION FLOW MA TERIAL MODE LENGTH CEILING MODEL (in.) TYPE 37HS2 HS 2-W ay Alum Cooling 47 T -Bar 59 46.92 T egular T -Bar 58.92 48 Continuous T -Bar 60 47.38 Narrow T -Bar 59.38 1 174 mm Metric 1200 mm One-W ay Alum Cooling 47 T -Bar 59 46.92 T egular T -Bar 58.92 48 Continuous T[...]

T able 20 — Standard Diffusers for 37HS4 UNIT DESIGNA TION CONFIGURA TION FLOW MA TERIAL MODE LENGTH CEILING MODEL (in.) TYPE 37HS4 HS 2-W ay Alum Cooling 47 T -Bar 59 46.92 T egular T -Bar 58.92 48 Continuous T -Bar 60 47.38 Narrow T -Bar 59.38 1 174 mm Metric 1200 mm One-W ay Alum Cooling 47 T -Bar 59 46.92 T egular T -Bar 58.92 48 Continuous T[...]

T able 21 — Optional Diffusers for 37HS1 UNIT DESIGNA TION CONFIGURA TION FLOW MA TERIAL MODE LENGTH CEILING MODEL (in.) TYPE 37HS1 AG 2-W ay Alum Cooling 23 T -Bar 47 22.92 T egular T -Bar 46.92 24 Continuous T -Bar 48 23.38 Narrow T -Bar 47.38 1 174 mm Metric 1200 mm AG One-W ay Alum Cooling 23 T -Bar 47 22.92 T egular T -Bar 46.92 24 Continuou[...]

T able 22 — Optional Diffusers for 37HS2 UNIT DESIGNA TION CONFIGURA TION FLOW MA TERIAL MODE LENGTH CEILING MODEL (in.) TYPE 37HS2 AG 2-W ay Alum Cooling 47 T -Bar 59 46.92 T egular T -Bar 58.92 48 Continuous T -Bar 60 47.38 Narrow T -Bar 59.38 1 174 mm Metric 1200 mm AG One-W ay Alum Cooling 47 T - Bar 59 46.92 T egular T -Bar 58.92 48 Continuo[...]

T able 23 — Optional Diffusers for 37HS4 UNIT DESIGNA TION CONFIGURA TION FLOW MA TERIAL MODE LENGTH CEILING MODEL (in.) TYPE 37HS4 AH 2-W ay Alum Cooling 47 T -Bar 59 46.92 T egular T -Bar 58.92 48 Continuous T -Bar 60 47.38 Narrow T -Bar 59.38 1 174 mm Metric 1200 mm AH One-W ay Alum Cooling 47 T -Bar 59 46.92 T egular T -Bar 58.92 48 Continuou[...]

Throw for Standard Dif fusers — T ables 24 and 25 provide the suggested minimum and maximum coverages the Moduline® air terminals can handle in a typical instal- lation while maintaining the desired room conditions. T able 24 — Air Throw Data — 1-W ay and 2-W ay Blow , 2-Slot Dif fusers 37HS1 UNIT AIRFLOW (Cfm) OPTIMUM AIR THROW (ft) 1-W ay [...]

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Copyright 1991 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 3 Ta b 6 a PC 201 Catalog No. 513-741 Printed in U.S.A. Form 37HS-1XA Pg 84 6-91 Replaces: New[...]