Horizon Reverse Osmosis Seafari Versatile SFC-1400-2, Owner'S Manual

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HRO
Systems
Horizon
Seafari
Self Contained and Modular Style
Replace the High and Low Pressure Seals and associated O-Rings together as a set. Change
these seals every 2,000 - 4,000 hrs depending upon age and operating conditions.
H. PRESSURE SWITCHES:
High Pressure Switch The High Pressure Switch shuts the System down as the System Pressure into
the Back Pressure Regulator reaches 950 psi ± 50 psi ( 900 to 1000 psi setting is acceptable )
The System shuts down and the Low/High Pressure Fault Lamp illuminates when operating pressure
does not exceed 900 psi
The High Pressure Switch has drifted from its factory setting and requires adjustment upward.
The System does not shut down when the operating pressure applied exceeds 1000 psi.
The High-Pressure Switch has drifted from its factory setting and requires adjustment
downward.
Low Pressure Switch The Low Pressure Switch closes as the Pre-filtration pressure rises above 6 psi
(± 2 psi ) in order to maintain the System in operation. The Low Pressure Switch opens and shuts the
System off as the Pre-filtration pressure drops, due to dirty Pre-filtration, below 4 psi (± 2 psi).
Note: To prevent mistaking dirty Pre-filtration for a malfunctioning Low Pressure Switch, physically
check the Low Pressure Switch Setting.
In order to check the Low Pressure Switch Setting:
With the system operating, slowly close the Inlet Sea Cock Valve. While closing this valve,
view the Low Pressure (LP) Gauge while simultaneously viewing the LP/HP Fault Lamp. If the
LP Switch is properly adjusted, the LP/HP Fault Lamp blinks on and off as the Feed Water
Pressure drops to between 6 to 2 psi. If the LP Fault Lamp blinks prior to 6 psi, the LP Switch is
set too high. If the LP Fault Lamp blinks only after pressure drops below 2 psi or does not blink
at all, then the LP Switch is set too low.
Adjust or replace the LP Switch but first refer to: A. SYSTEM SHUTS DOWN BY ITSELF
AND A FAULT LAMP IS ILLUMINATED
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