WL500
Manual
Page 82 Revision 4‐10‐2019
2.
Run On
“Run On” or “Carry On” is present in all Waterlogic pressure fed units without outlet solenoids.
“Run On” is defined as the amount of water that continues to dispense out of the faucet after
releasing the dispense button. Run On exists because the tanks pressurize as water is being
dispensed. Every Waterlogic tank has an outlet restrictor to ensure the tanks remain full of water
and water is controlled as it is released to the faucet. The inlet solenoid controls flow into the tanks.
The tanks will “depressurize” once the dispense button is released the inlet solenoid closes. A small
amount of water will “Run On” through the faucet as the tank depressurizes to atmospheric
conditions. Typical “Run On” is 2‐3 seconds. “Run On” can be reduced by installing a pressure
limiting device.
The amount of inlet or supply pressure directly impacts the amount of “Run On” as quantified
below.
WLCP Lab Testing of Rn On 7‐31‐2013
Pressure
Pressure
Time
Flow Rate
Run On
Static PSI
Dynamic PSI
4 Liters
I/min
Seconds
68
40
61
2.9508197
3
50
30
72
2.5
2.5
32
20
92
1.956217
2
Pressure measured at inlet line to unit. Static with unit closed. Dynamic with unit dispensing cold‐
water.
No Filters were installed in unit.
3.
Low Flow of Water – Rated Service Flow is 1.89 Liters (0.5 gallons) per Minute
Possible Reason
Solution
Determine Flow of
Water
Rated Flow Rate is 1.89 Liters (0.5 gallons) per minute
. Check flow
rate by dispensing into a container to measure for one minute and
measure the amount of water that was dispensed.
Feed Lines too small
Feed lines can restrict flow if run long distances from the supply. It
may be necessary to increase the supply line (e.g., use 3/8” feed line
vs. ¼”.
Elbows and turns in
the feed line
Minimize elbows and turns in the feed line.
Filters
Filters with high pressure drop due to fouling or just by design.
Change filters more frequently or go to higher micron size filter for
local water conditions.
Restrictions
Follow flow path to ensure there are no undiscovered restrictions due
to debris or malfunctioning valves, including the supply valve at the
source.
Booster Pump
Add a booster pump to the supply line if the feed is slower than
needed.
