32
Winterizing Procedures
NOTE: Failure to properly winterize your machine may result in serious and costly damage to wetted
components (pump, heater coils, and reel components) of your Model 720 dew simulator if your machine is
exposed to freezing temperatures. Outlined is the recommended method for all occasions during freezing
weather, including long-term storage. It is highly recommended that pressurized air be used to blow as much
water as possible out of the system. Additionally,
Propylene Glycol based RV Antifreeze
be used. Do not
use an Ethanol based RV antifreeze. It is possible to reclaim some of the RV antifreeze to be used for
subsequent use. When using this method, occasionally check the strength of your antifreeze, as there will be a
slow but steady dilution through repeated use.
1. Turn off the incoming water supply and return lines to your machine. Disconnect the water supply and
return hoses and drain them and the tank thoroughly.
2. With the reel in its upright transport position, disconnect the 3/4
” supply line to the reel. Spin the reel by
hand to allow any water trapped in the reel to drain out through the swivel.
3. Remove the elbows from the perimeter nozzle pumps by sliding the tabs on the pumps back. Use
pressurized air to blow out these lines.
4.
Disconnect the 1” cam coupler between the flow meter and the pump and allow water in pump and intake
line to drain out. Empty the intake filter bowl assembly at the rear of the machine. Use pressurized air to
blow any water in the intake line out. Once drained, reconnect the cam coupler.
5. Locate the 1/4
” Tee fitting directly below the pressure gauge. Remove the ¼” plug from the Tee and install
an air coupler. Connect a pressurized air source to the coupler and blow any water out of the system.
Activate the Arm Override button on the controller to close the 2-way valve and force the air flow through
the heaters. Open the warm up valve to flush out, then close the warm up valve. Open the flush valve and
allow water to be blown out. Once the system is blown out with air, remove the air coupler and reinstall the
1/4
” plug and deactivate the arm override on the control.
6. Drain the fluid in the lines for the perimeter nozzles by disconnecting the elbow fittings at the pump and
allowing to drain. Perimeter nozzle tips can be removed to drain more fully. Once drained, reinstall.
7. Place approximately 25 gallons of Propylene Glycol based RV antifreeze in a 55 gallon drum. Connect the
2” suction line from the descaling kit to the inlet of the dew simulator and place the other end in the drum of
RV antifreeze. Connect the 3/4
” discharge line from the descaling kit to the dew simulator and place the
discharge end into the drum.
8. Activate the Arm Override and Warmup Valve on the cab controller. Turn on the PTO and run at an idle to
allow the system to draw RV antifreeze from the drum, prime, and circulate back to the drum. Allow the RV
antifreeze to circulate back into the 55 gallon drum for 5 minutes. Deactivate the Warmup Valve on the cab
controller to force antifreeze towards the reel. Turn off the PTO when RV antifreeze starts to exit the 3/4
”
high pressure discharge hose. Turn off the Arm Override on the cab controller.
9. Disconnect the suction and discharge hoses from the rear of the Dew Simulator.
10. To reclaim your RV antifreeze, repeat steps 3-5 to manually drain the reclaimable RV antifreeze from the
system.
11. To return unit to operation, reconnect the 3/4
” high pressure discharge hose to the reel swivel. Reconnect
the tank suction line and discharge lines to the rear of the dew simulator. Fill the supply tank with
approximately 100 gallons of clean water. Turn on the water supply. Lower the reel to the operating
position and turn on the PTO to flush the system of all remaining antifreeze until discharge water is clear.
Summary of Contents for 720 Dew Simulator
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Page 7: ...7 Safety Decal Locations...
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