Carrier 37HS specifications Single Moduline Unit Connected to Supply Duct

Fig. 9 Ð Single Moduline Unit Connected to

Supply Duct

Fig. 10 Ð Moduline Units in Air Series

Fig. 11 Ð Master Unit and Slave Units

CONTROL END Ð The control end of a Moduline 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 diffuser pro- jections from the plenum. In Fig. 13, the longer projection, B, is the control end.

The ®lter, volume controller, and diffuser-mounted ther- mostat are applied to the control end of a master unit.

Fig. 12 Ð Control Block

Fig. 13 Ð Control End of Unit

Step 1 Ð Determine Air Volume (Cfm) Per Ter- minal Ð Before you can start making a layout, you must know the required air volumes (cfm).

Use the cfm per zone you obtained from the cooling load calculation and, using Table 3, Recommended Maximum Cfm Per Terminal, decide on the number of terminals you will need in each zone.

Cost dictates that the fewest number of Moduline units be used consistent with good design. The maximum cfm per unit that can be used (to keep the total number of units down) is mainly a function of maximum acceptable sound level.

Perimeter zones with glass in the east, west, and south building zones have peaks of rather short duration (i.e. loads vary widely during the course of the day and year). There- fore, a higher sound level can be tolerated for these short peaks.

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