Harken HYDRO 2 Power Unit - Manual (Page 17)

Hydro 2 17
Operation
Power Up / Power Down
Harken Hydro Power Units have system isolation switches on
the electronic control box.
During short-term, inactive periods the system isolation switch
should be in OFF position. This deactivates deck switches.
For long-term storage, in addition to placing isolation switch in
OFF position, remove the fuse or circuit breaker between HPU
motor and battery.
Oil Level
Maintain an oil level of
2 / 3 - 3 / 4 full as viewed through Oil Level
Indicator. Always inspect oil level before use. If necessary to
maintain proper level, add more filtered oil to tank.
Motor Thermal Protection
Harken standard Hydro Power Units feature a 4kW 24VDC series
wound motor. (12VDC motor available by special order) Motors
are specified to provide years of service under standard operating
conditions.
Due to high current draw, these motors will generate excessive
amounts of heat after extended periods of operation at load.
To avoid motor damage, the motor is equipped with an
internal thermal monitor and switch.
The motor is sized to run a minimum of five (5) minutes without
tripping the thermal switch. If overheating occurs and the thermal
switch is tripped, an indicator light on ECB will illuminate. After this
occurrence, the motor requires a variable cooling period based
ambient conditions.
CAUTION! Motor operation beyond temperature limits will cause damage to motor and possibly other components.
Single- and Multiple-Function Operation
The Hydro 2 is designed to operate either two single-flow functions on different manifolds or one double-flow function at a time. All
functions are powered by either one or both motors. If additional functions are operated simultaneously, oil flow will be divided among
all functions and performance across all operating functions will decrease.
Electronic Control
Box (ECB)
Oil Level
Indicator
CAUTION! In case of emergency, thermal switch override is located inside the ECB. Flip toggle switch to engage override.
Once thermal switch override is engaged, motor will operate until it stalls. If thermal switch override is engaged, HPU
warranty may be voided.
Internal Thermal Switch Override