CHART 3000 - Page 30

26
Troubleshooting Product Manual - Perma-Cyl
®
w/ FlexFill™ Piping Option
Trouble Probable Cause Remedy
Frost or ice on sides,
bottom, top-center
and / or plumbing of
tank.
(continued)
Weak vacuum or failed vacuum. 1. Check if tank pressure is routinely high even
during gas use and / or if tank has cold or ice spots
even when not in operation as sign of vacuum
problem.
2. Condensation or sweating is seen over the entire
outer shell as a sign of vacuum problem.
3. Call gas service agent.
Unknown. 1. Call gas service agent.
Routinely low
pressure in tank.
PB shut-off valve is closed.
(If PB is not operating, no frost ring will
appear at the bottom of the tank or on
external PB vaporizer during gas use.)
1. Open pressure building regulator control valve and
allow pressure to build.
2. Call service agent to repair, replace or adjust
regulator.
Pressure builder setting is too low.
(If PB is not operating, no frost ring will
appear at the bottom of the tank or on
external PB vaporizer during gas use.)
1. Adjust regulator to higher pressure and allow
pressure to build.
2. Call service agent to repair, replace or adjust
regulator.
Economizer regulator setting is too low or
economizer regulator is stuck open.
1. Adjust regulator to higher pressure (should be
at least 15 psig above pressure build regulator
setting).
2. Check to ensure regulator is not stuck open.
Relief valve(s) stuck open. 1. Evacuate and ventilate the room.
2. Check exhaust of relief valve to see if gas is
owing at a pressure below the pressure stamped
on the valve.
3. Tap lightly on the side of the relief valve to attempt
to dislodge any obstruction holding valve open.
Repeat several times, if needed.
4. Call gas service technician to replace relief valve,
if necessary.
Large gas leak from tank plumbing or
from gas use system.
1. Evacuate and ventilate the room.
2. If possible, locate and repair leak or call gas
equipment service technician.
Gas or liquid withdrawal rate exceeds the
tank specications.
1. Excess usage will cause tank pressure to
decrease as PB is unable to maintain pressure.
Decrease withdrawal rate to within design
specications.
2. Increase pressure setting on PB regulator.
3. If withdrawing gas, consider: (a) withdrawing liquid
and using external vaporizer, (b) installing larger
tank, (c) installing additional tank(s), or (d) splitting
application.
4. If withdrawing liquid, consider: (a) installing larger
tank, (b) splitting application or (c) installing
additional tank(s).
5. Call gas service agent.
Unknown 1. Switch to emergency gas cylinder.
2. Call gas service technician.
Gas supply to gas-
use equipment is too
cold.
Ambient temperature surrounding the
Perma-Cyl tank is too cold.
1. Move tank to warmer location.
2. Install freestanding ambient vaporizer on gas
supply line in warmer location or install in-line gas
heater.