MotorVac COOLANTCLEAN III - Manual (Page 8)

Theory of Operation
Detailed descriptions of the various operations, switches and indicators that make up
the Coolant Clean-III’s control panel are listed below.
3- Position Power Switch:
♦ When the main power switch is in the OFF position (CENTER):
(And unit connected to an operating vehicle) The unit will be in a flow through or “by-pass” mode.
At this time, coolant flow from the vehicle passes through the unit and returns to the vehicle.
The OFF position will also disable the unit’s audible, low-level alarm (if activated). At this time the
“Top-off” feature will be operational until the unit has been disconnected from power.
♦ When the main power switch is pressed to the VACUUM position (LEFT):
The Coolant Clean-III’s vacuum pump and 2-way solenoid will activate simultaneously and apply
vacuum to the system being serviced. In VACUUM mode, used coolant will be pulled from the
vehicle through the unit’s RED / vacuum hose, passing through the unit’s filter screen assembly
then exhausted from the unit through the CLEAR BRAIDED disposal hose (which should be
inserted into the shop’s coolant recovery system or connected to the waste tank ‘nipple of the
Coolant Clean-III’s waste capture tank.).
♦ When the main power switch is pressed to the SERVICE position (RIGHT):
The CoolantClean-III’s Green “service in progress” indicator will illuminate, the pressure pump
and the vacuum pump will activate simultaneously supplying new coolant from the reservoir tank,
through the pressure pump and to the vehicle being serviced through the unit’s GREEN / new
coolant hose. At this time, the vehicle’s used coolant flow will be routed to the unit through the
unit’s RED / used coolant hose & exhausted from the unit through the CLEAR BRAIDED disposal
hose (which should be inserted into the shop’s coolant recovery system or connected to the units
waste capture tank ‘nipple’.)
2-Position On-Off Switch: (Top-Off function)
♦ When activated, this feature will:
Disable the unit’s Amber “Low Fluid Level “ indicator (If illuminated).
Override low-level “by-pass” mode to provide additional coolant from the unit’s reservoir to top-off
the vehicle’s cooling system anytime the unit is connected to power. Coolant will be provided
through an open-ended adaptor connected the unit’s GREEN / new coolant hose.
Empty waste switch: Used to drain- (empty) the waste fluid capture tank. Note:
Hoses must be switched before “draining”. The clear-braided waste hose must be
disconnected from the waste tank nipple and an adapter inserted into it’s coupler.
Direct the clear hose into the shops waste tank. Hook up the RED hose coupler to
the waste tank “nipple”. Then activate the empty waste switch. Pump should stop
automatically when waste tank is empty.