Explore The Reserved Building Capacity - Xerox DocuTech 6100 Install Manual

Select and prepare an installation site

Explore the reserved building capacity

4-24
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.
DocuTech 61xx Installation Planning Guide