Applying Split Coil From Accessories
If a unit has already been selected and added to a project, or if the split coil criteria are not known, a glycol circuit may be applied by using the Split Coil wizard found on the Accessories screen.
Evaporative Condensers only.
Split coil should only be applied to single unit selections, and will not work on multi-unit selections.
Split coil may be as part of initial design criteria. See Applying Split Coil from Design Criteria for more information.
Selecting an ideal unit
As required condenser capacity cannot be modified after initial selection, it is important that the condenser selected be above capacity prior to applying a glycol cooling split.
The glycol split could have a large impact on the overall capacity of the unit. Knowing the size of the glycol split as a percentage of the refrigerant capacity would give a good indication to the best unit to select initially.
If the unit is undersized after using Split Coil, then a different unit will need to be selected.
The selection criteria used for this example are:
- Product line - ATC-E
- Refrigerant - ammonia
- Condensing temperature - 95°F
- Wet bulb - 78°F
- Total heat of rejection - 2,000MBH
We did not factor the glycol capacity requirement into our initial criteria, and selected the ACT-221E as it has adequate additional capacity for our glycol cooling needs.
Using the Split Coil wizard
To apply split coil to an already selected condenser:
- Navigate to Accessorize.
- Click Split Coil
from the toolbar. - Under the glycol conditions on the right side, enter the required glycol conditions.
- Once the glycol conditions are entered, click Calculate.
- Percentage of total available tubes that each circuit uses
- The pressure drop for each circuit
- Adjusted percentage capacity of each circuit based on the input conditions
- If necessary, click Edit Inputs to modify the criteria.
- When satisfied with the provided solution, click Apply to save as an accessory applied to the unit.
The Split Coil wizard opens.
The refrigerant conditions display on the left side, and the glycol split coil conditions on the right.
The Fluid Outlet temperature must equal the Condensing Temperature, due to the proximity of the fluids in the same coil and the thermal effect of the condensing temperature on the spray water temperature.
Upon completing the calculation, the window displays:
Split coil cannot be approved and applied to a condenser if either circuit is below capacity (100%).
The split information and adjusted condenser capacity will be shown on the accessories screen as well as the technical data sheet, quote, and order write-up.