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CHAPTER 3: Loads and Zones
Fig. 3.6 Sample Pump Selection Section with Data
Auto-Select
This option is by far the easiest method of matching a pump to the loads in a
particular zone. By clicking the Auto-Select button, GLD utilizes the information
stored for the active pump series and determines which pump within the list is
best suited to the zone in question. If the listed pumps are too small for the zone
loads, the software increases the number of pumps of each size until an acceptable
match is achieved.
The pump selection process uses information from the Zone Manager loads
module. This includes the chosen inlet source temperature, the flow rate, the heat
pump series, and the initial inlet load temperatures. The flows and load
temperatures can be entered at the bottom of the module, and the active heat
pump series and load temperatures may be changed on the Heat Pumps tabbed
panel.
Manual Select
If an automatically selected heat pump is for any reason undesirable, or a different
pump series from the same manufacturer, or even from a different manufacturer is
required, the Select button may be used. This button allows the designer to
choose any of the stored pumps. As with the Auto-Select button, all of the
associated fields are calculated automatically once the pump is selected.
When the Select button is pressed, the selection panel appears, as shown in figure
3.7. After a pump is chosen, pressing Select Pump will place the pump in the
zone and automatically calculate all of the associated parameters. Cancel will
return the user to the main display without changing any pumps.
Note: Unlike with Auto-Select, a pump that is manually selected may or may not
match the loads in the zone. It is the responsibility of the designer to make sure
the pumps match the zones.
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