Xerox 6180N DocuSP 61xx version 3.6 - Installation Planning Guide - Page 42

Select and prepare an installation site Explore the reserved building capacity Consult the site HVAC engineer or contractor to determine if the added heat load can be managed by means of reserved cooling capacity available from the building source. This could be a change in the rate of incoming air or a reduction in the incoming air temperature. If this is possible, use the Heat Management Worksheets again with the new airflow rate (step 1a) and the incoming air temperature (step 1b) that is obtained. When recalculating the temperature of the room under maximum heat load conditions (step 2), use the following formula to compensate for the airflow not considered before: 1. Divide the change in airflow rate (CFMs) by the new total CFMs. For example, if an additional 500 CFMs have been added to the airflow rate, which used to be 1000 CFMs (step 1a), the new total CFMs would be 1500. Five hundred would then be divided by 1500. The result would be 1/3. 2. Subtract the incoming air temperature (step 1b) from the present maximum temperature (step 2). For example, if the present maximum temperature is 75° F (24° C), and the incoming air temperature is 55° F (13° C), the result would be 20° F (11° C). 3. Multiply the result from step 1 (above) by the difference in temperature from step 2 (above). The result would be subtracted from the old number in step 2 of the Heat Management Worksheet. In using the above example, 1/3 would be multiplied by 20°F (11° C). The result of 7° F (4° C) would be subtracted from step 2 of the Heat Management Worksheet. If the available reserve capacity still results in an unacceptable change in room temperature, consider other alternatives. 4-24 DocuTech 61xx Installation Planning Guide