FloAire HOT WATER COIL MODULE - Manual (Page 11)

FLUID IOM
Shut-off Valve
w/Hose Connection
Throttling
Valve
Vent
Hole
Inhibited
Glycol
Reservoir
Pump
Shut-off Valve
w/Hose Connection
Drain
Vent
9
4. Drain the coil by opening all drain valves and/or the drain plug. Remove the vent plug to
aid the draining process.
5. Close the drain valve(s) and drain plug.
6. Connect the flushing system to the coil. A typical system is shown in Figure 5 - Flushing
System Diagram.
7. With the throttling valve closed, start the pump and operate until the air is vented from
the coil. Next, close the air vent.
8. Open the throttling valve about half-way and circulate the fluid through the coil for 15
minutes. Check the strength of the fluid. A hydrometer or test kit from the fluid manu-
facturer is suitable for this application.
9. Adjust the solution strength as needed and circulate the fluid for another 15 minutes.
10. Repeat steps 8 and 9 until the desired concentration is reached.
11. Shut the pump down and drain the inhibited glycol from the coil.
12. The recaptured fluid can be used to flush other coils.
Note: Be sure to follow the manufactures’ recommendations before utilizing any glycol based anti-
freeze solution. Additional fluid will be required for the pump, connected piping and fluid
reservoir. Formulae are for estimation purposes only.
Figure 5 - Flushing System Diagram