If pressure is low, check as follows:
· Check blue lights.
- MEDIA FILTER INLET light (29) must be on.
- MEDIA FILTER OUTLET light (30) must be on.
- If they are not, troubleshoot automatic valves.
· Feed valve (9) must be open.
· Cartridge filter block valve (21) must be open.
· Check raw water canvas hoses to be sure pump is providing water. Hose should be firm
with water pressure. If not, stop pump and recheck the prime (para. 2-17b).
· Refer to troubleshooting.
High pressure pump is ready to star it
· Water is flowing through the waste out hose.
· FEED PRESSURE LOW light (33) is OFF.
· System pressure control valve (3) is open.
· CARTRIDGE INLET/OUTLET PRESSURE gage (28) reads 50 psig (345 kPa) or more (red
needle) and is steady.
Push HIGH PRESSURE PUMP START (34).
Stop pump and refer to Troubleshooting, Table 3-1 if pump vibrates excessively, or if the
piping pulses severely.
DO NOT exceed 900 psig (6210 kPa).
Slowly turn system pressure control valve (3) clockwise until product flowmeter (35) shows mission normal (refer to
Tables 2-18 and 2-20) or selected push condition water flow.
Check generator and adjust throttle to provide 60 Hz. Adjust voltage to provide 440 VAC.
Make sure the product shut-off valve (31) is open.
Fill clean/flush tank (19) with product utility hose and add one 2 ounce packet of bisulfite (para. 2-17 b(2.1 )).
Direct product water to storage tanks (para. 2-17d).
Refill hypochlorite tank if required (para. 2-17b).
Read and record the media filter differential pressure at MEDIA INLET/OUTLET PRESSURE gage (2) if pressure
differential is more than 15 psig (103 kPa), continue with the next step. If the differential is less than 15 psig (103 kPa),
the backwash procedure is complete.
Continue operation until the compressor builds up an air tank pressure of at least 900 psig (6204 kPa), and repeat
If two backwashings do not restore acceptable pressure differential, refer to
Change 12 2-95