Design Criteria Selection
Design Criteria selection is the default method of selection, and is available for all product groups.
Click the image below for a brief overview of the user interface.
To search by design criteria:
- Select the desired product group from the toolbar.
- Select the desired product lines from the Product Lines list.
- Specify the operating parameters as populated based on selected product lines.
- Specify the capacity range and number of units (if applicable).
- Click Search.
Spectrum caches one set of search results per product group.
If a second search is executed within the same product group (ex. evaporators), the new search results will clear the previously returned search data.
Be sure to save to a project all desired units before executing a new search.
Selecting Units for Dry or Evaporative Operation
Coolers and condensers only.
When eligible product lines are selected, an additional parameter module appears, Additional Parameters - Evaporative.
By default, Evaporative is selected. by setting it to Dry, the search will only return units that are capable of meeting the design criteria requirements while operating completely in dry mode.
When Dry is selected, you will need to specify a Dry Bulb and Relative Humidity for an accurate search.
This information can be acquired through the ASHRAE weather data window, see ASHRAE Weather Data below for more information.
Additional Information
Product Group Criteria
The available criteria differs between selected product group, and whether you select evaporative, hybrid, or dry/adiabatic product lines.
Dry & Adiabatic Units
Dry and adiabatic units have some additional parameters unique to them; you can learn more about these parameters by going to Dry & Adiabatic Criteria.
ASHRAE Weather Data
Coolers and condensers only.
When wet bulb and dry bulb data is not readily known, you can check the ASHRAE data for local conditions.
You can access the ASHRAE weather window by clicking Check ASHRAE Weather Data, located next to the Wet Bulb parameter.
Click the image below for a brief overview of the ASHRAE weather window.
Using ASHRAE Weather Data
- Type in the location of the job site, or the closest known location.
- Select the best weather station, then copy and paste the most suitable conditions into the corresponding operating parameters.
The window will list the five weather stations closest to that location.