Symtech VFX 1 - Manual (Page 13)

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flow control valve connected to the upper radiator hose adapter and the BLACK/USED flow control valve
connected to the engine block outlet adapter.
The vehicle is started and allowed to reach normal operating temperature which allows the thermostat to open
allowing coolant to flow from the unit through the cooling system and back into the unit. The coolant is flowing
as normal when operating temperature is reached, but the unit is in the loop receiving used coolant as it is pumped
out and injecting new coolant in its place.
The flow may stop and start intermittently, as the new coolant cools the thermostat, closing the thermostat until
normal operating temperature is reached, re-opening the thermostat and flow resuming.
PRESSURE TEST, DISCONNECTING, and TOPPING OFF procedures remain the same once the fluid
exchange is complete.
4. RESERVOIR TANK, PRESSURE CAP: Systems that do not have a pressure cap on the radiator will in most
cases have a pressure cap on a Remote Reservoir Tank. In those instances it will be necessary to pinch closed the
hoses to the reservoir tank during the coolant exchange.
If hoses are not pinched closed, it is possible for coolant to be forced out of pressure cap and also the coolant
exchange will not be an entire system flush as coolant is routed around the engine and through the reservoir.
COMPLETE THE FOLLOWING STEPS TO REVERSE
FLUSH A TRADITIONAL FLOW COOLING
SYSTEM:
LOWER LEVEL
The LOWER LEVEL (YELLOW) procedure is intended to reduce coolant spillage created when disconnecting
the upper radiator connection by lowering the coolant level below the disconnection point.
1)
Verify adequate amount and type of new coolant to complete exchange is in new
coolant tank.
2)
Verify adequate capacity for used fluid in used fluid sight gauge. Refer to
EMPTY USED coolant section to empty used coolant tank.
3)
Verify that all VFX 1 Control panel valves are in the neutral position, (Fig 1)
and flow control valves at hose ends are off.
4)
Connect clean shop air supply (70-120psi).
5)
Turn AIR CONTROL valve (#1) FUNCTION CONTROL, valve (#2) FLUID
CONTROL Valve and valve (#3) to the right LOWER LEVEL ( YELLOW ),
(Fig 2). Vacuum will begin to build on the compound gauge.
6)
Connect vacuum cone with extension tube to BLACK/USED coolant hose and
open BLACK/USED coolant flow control valve at hose end. (Fig 3)
7)
Insert vacuum cone with extension tube into overflow tank and remove all used
coolant from tank. Do not seat cone into overflow tanks opening.
8)
Remove radiator cap – Has Pressure Relief Procedure been performed? -
insert vacuum cone with extension tube being careful not to damage radiator
components.
9)
Lower coolant level as far as possible by observing used coolant flow in hose.
10)
When used coolant flow ceases, close used coolant flow control valve at hose
end.
11)
Return all control panel valves to correct neutral position, (Fig 4) and flow
control valves at hose ends off.
12)
REPLACE RADIATOR CAP.
Figure 1
Figure 2
Figure 3
Figure 4