Carrier 37HS - Manuals

Fig. 5 — Separate Duct Heating System Performance Heating — Downblow Slot NOMINAL LENGTH (ft) 2 4 TYPE DIFFUSER Cfm Placement (in.) Cfm Placement (in.) Min Max Min Max Heating SlotBoot Diffuser 20-70 12 24 25-120 12 24 NOTES:1. Minimum and maximum show distance diffuser should be lo- cated from peri...

Changeover Moduline t Heating/Cooling — Both hot air and cold air distribution are possible with a Moduline system.The Moduline unit uses a director diffuser which, sensingthe duct temperature of the supply air, directs the air towardsor away from the perimeter wall. (Fig. 7.) The Moduline location ...

Additional Guidelines for Heating — In addition to down-blow slot boot diffusers and Moduline director diffusers, roundnozzles spaced along the perimeter wall will also providesatisfactory overhead heating distribution. Some guidance foroutlet use are shown in Tables 1 and 2. Moduline heating and co...

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 affected by the desired sound level in the room and the type of use of the space. For example, an executive offic...

Table 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 TOTAL AIRFLOW (Cfm) 37HS1 5 x 7 4 110 7 x 7 6 400 9 x 9 8 800 11 x 11 10 1100 37HS2 7 x 7 6 400 9 x 9 8 800 11 x 11 10 1100 37HS4 9 x 9 8 800 11 x 11 10 1...

FLEX DUCT IN AIR SERIES — Flexible duct is often usedin air series to connect Moduline t units. In calculating pres- sure requirements for units in air series, use the followingguidelines: 1. For close-coupled units (either continuous diffuser or units in adjoining ceiling modules) where the flexibl...

Step 4 — Determine Controller Location — The final step in the terminal selection and layout process is todecide 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 determi...

4. The controller for units in an air series should be located as shown in Fig. 28. 5. Volume 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 different airseries from that of the master unit. See ex...

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 ther...

UNIT SHUTOFF — BELLOWS FULLY INFLATED UNIT MODULATING — BELLOWS PARTIALLY INFLATED UNIT FULL CAPACITY — BELLOWS DEFLATED Fig. 32 — Bellows and Unit Air Valve Arrangement 42

HIGH AND LOW PRESSURE — As primary air flows fromthe unit plenum to the unit air valve and from there to theconditioned space, it passes through a slotted plate calledthe distribution baffle. The resistance of the baffle tends to‘‘even out’’ the airflow through the unit. The baffle also cre-ates a p...

BELLOWS PRESSURE — As the airflow through the unitchanges, 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 airvalve. Bellows pressure varies from near zero at full flow toplenum or du...

Both CV and VAV control packages include a plastic baffle which is installed over the vertical leg of the center diffuserand blocks the unused portion of the diffuser slots. SeeFig. 42. On VAV units, this prevents stray air currents frominfluencing thermostat operation. Other control components used...

SYSTEM-POWERED APPLICATIONS Constant Volume (CV) Cooling — (Function No. 1.) This isthe most basic operating configuration. The control arrange-ment consists of the volume controller and the filter. The unitmaintains a steady flow of primary air at the quantity set onthe volume controller over a ran...

NOTE: The following applications require the control pack-ages shown for Function 10, plus field-supplied thermostatsas described below. Night Set Back Heating — In the interest of energy conser-vation, it may be desirable to raise a system’s cooling setpoint during unoccupied time periods, whether ...

Table 15 — 37HS Control Combinations NO. FUNCTION MODEL CONTROL CONNECTION ARRANGEMENT PACKAGES REQUIRED 1 SYSTEM POWERED CONSTANT VOLUME COOLING 37HS1 37HS900003 37HS2 37HS900003 37HS4 37HS900003 2 SYSTEM POWERED VARIABLE VOLUME COOLING DIFFUSER THERMOSTAT 37HS1 37HS900001 37HS2 37HS900002 37HS4 37...

Table 15 — 37HS Control Combinations (cont) NO. FUNCTION MODEL CONTROL CONNECTION ARRANGEMENT PACKAGES REQUIRED 4 SYSTEM POWERED VARIABLE VOLUME COOLING SYSTEM POWERED WARM-UP WALL THERMOSTAT* 37HS1 37HS900003 37CM90015237CM901012 37HS2 37HS900003 37CM90015237CM901012 37HS4 37HS900003 37CM90015237CM...

CONTROL OPERATING SEQUENCES System-Powered Controls CV COOLING — See Fig. 54. Air from above the distri-bution baffle (high pressure) enters the filter through the up-per port of the control block, while the lower port receivesair from below the baffle (low pressure). These air streamspass through s...

VAV COOLING — In VAV operation, the filter and volumecontroller perform the same functions as in CV operation.The unit-mounted thermostat modifies control operation asdescribed below. Refer to Fig. 55. The air enters the low pressure chamber of the volume controller through a fixed orifice. The low ...

VAV COOLING WITH WARM-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 ductsystem, even though the cooling thermostat is satisfied bycool space temperature. The warm-up switch is actually a temperature contro...

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

VAV HEATING AND COOLING WITH SYSTEM-POWERED CHANGEOVER — This application uses a CVcontrol 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 act...

System-Powered Controls with ElectricInterface VAV COOLING WITH ELECTRIC WARM-UP — Anotherapproach to warm-up is the addition of an electric warm-upvalve; the operating principle is the same as system poweredwarm-up. A building with its conditioning system shut downduring unoccupied hours must be br...

VAV HEATING AND COOLING WITH ELECTRICCHANGEOVER — 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 betweenthe cooling and heating sides of a ...

VAV COOLING WITH ELECTRIC HEAT INTERLOCK —A conditioned space may contain a Moduline system for cool-ing and a separate heating system such as baseboard electricor hot water or an overhead fan coil. The electric interlockswitch enables the cooling and heating systems to operate asthe load dictates w...

System-Powered Controls with PneumaticInterface PNEUMATIC SEQUENCED HEATING/COOLING (HOTWATER) — By using a 20 psi pneumatic source, one ther-mostat can control both heating and Moduline cooling in theconditioned space. The pneumatic circuit is interfaced withthe system-powered circuit by use of a p...

VAV COOLING WITH PNEUMATIC WARM-UP OR FIRESAFETY SWITCH — Through the use of a specific pneu-matic switch, the functions of pneumatic warm-up and firesafety can be added to Moduline t installations. Pneumatic warm-up offers an opportunity to open all Modu- line units in an area to allow immediate ho...

AIRFLOW ADJUSTMENT Each 37HS volume controller is equipped with a maxi- mum cfm lever for setting the required unit airflow in thefield. The lever is located at the bottom of the controller. SeeFig. 84. The controller has a star wheel located at the top ofthe controller for setting the minimum airfl...

Variation in Maximum Airflow — As explained in the Terminal Selection and Layout section, Moduline t units in air series can be controlled individually with a volumecontroller at each unit, or with a master/slave combination,where one controller is used with multiple units. Allthe units on one contr...

AIR DISTRIBUTION Linear slot diffusers are an integral part of the Moduline unit. They provide excellent air distribution for the condi-tioned space. The diffuser configuration is designed to in-duce room air, creating continuous air motion for occupantsof the room and reasonably consistent temperat...

37HS — 2-WAY BLOW 37HS2 — ONE-WAY BLOW Fig. 86 — Typical Room Air Distribution Pattern 74

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

Table 18 — Standard Diffusers for 37HS1 UNIT DESIGNATION CONFIGURATION FLOW MATERIAL MODE LENGTH CEILING MODEL (in.) TYPE 37HS1 HS 2-Way Alum Cooling 23 T-Bar 47 22.92 Tegular T-Bar 46.92 24 Continuous T-Bar 48 23.38 Narrow T-Bar 47.38 1174 mm Metric 1200 mm One-Way Alum Cooling 23 T-Bar 47 22.92 Te...

Table 19 — Standard Diffusers for 37HS2 UNIT DESIGNATION CONFIGURATION FLOW MATERIAL MODE LENGTH CEILING MODEL (in.) TYPE 37HS2 HS 2-Way Alum Cooling 47 T-Bar 59 46.92 Tegular T-Bar 58.92 48 Continuous T-Bar 60 47.38 Narrow T-Bar 59.38 1174 mm Metric 1200 mm One-Way Alum Cooling 47 T-Bar 59 46.92 Te...

Table 20 — Standard Diffusers for 37HS4 UNIT DESIGNATION CONFIGURATION FLOW MATERIAL MODE LENGTH CEILING MODEL (in.) TYPE 37HS4 HS 2-Way Alum Cooling 47 T-Bar 59 46.92 Tegular T-Bar 58.92 48 Continuous T-Bar 60 47.38 Narrow T-Bar 59.38 1174 mm Metric 1200 mm One-Way Alum Cooling 47 T-Bar 59 46.92 Te...

Table 21 — Optional Diffusers for 37HS1 UNIT DESIGNATION CONFIGURATION FLOW MATERIAL MODE LENGTH CEILING MODEL (in.) TYPE 37HS1 AG 2-Way Alum Cooling 23 T-Bar 47 22.92 Tegular T-Bar 46.92 24 Continuous T-Bar 48 23.38 Narrow T-Bar 47.38 1174 mm Metric 1200 mm AG One-Way Alum Cooling 23 T-Bar 47 22.92...

Table 22 — Optional Diffusers for 37HS2 UNIT DESIGNATION CONFIGURATION FLOW MATERIAL MODE LENGTH CEILING MODEL (in.) TYPE 37HS2 AG 2-Way Alum Cooling 47 T-Bar 59 46.92 Tegular T-Bar 58.92 48 Continuous T-Bar 60 47.38 Narrow T-Bar 59.38 1174 mm Metric 1200 mm AG One-Way Alum Cooling 47 T- Bar 59 46.9...

Table 23 — Optional Diffusers for 37HS4 UNIT DESIGNATION CONFIGURATION FLOW MATERIAL MODE LENGTH CEILING MODEL (in.) TYPE 37HS4 AH 2-Way Alum Cooling 47 T-Bar 59 46.92 Tegular T-Bar 58.92 48 Continuous T-Bar 60 47.38 Narrow T-Bar 59.38 1174 mm Metric 1200 mm AH One-Way Alum Cooling 47 T-Bar 59 46.92...

Throw for Standard Diffusers — Tables 24 and 25 provide the suggested minimum and maximum coveragesthe Moduline® air terminals can handle in a typical instal-lation while maintaining the desired room conditions. Table 24 — Air Throw Data — 1-Way and 2-Way Blow, 2-Slot Diffusers 37HS1 UNIT AIRFLOW (C...