TMG TMG-HW28, Product Manual

Page: 25 / 41

PROBLEM POSSIBLE CAUSE SOLUTION
Excessive pressure
Small spray nozzle
Nozzle must be properly sized for the rated flow and pressure.
Reset unloader or pressure relief
if nozzle size is changed.
Faulty pressure gauge
Check the pressure gauge using a properly calibrated
pressure gauge on quick connects at the
equipment outlet.
Improperly adjusted unloader Adjust to the proper pressure using pressure gauge.
Faulty unloader Check the unloader action. If it is not working properly, it may
need repaired or replaced.
Pump chatters, caviataion,
vibration
Air in system Inspect places where air can enter the system. i.e. fittings,
hose, connections etc.
Chemical line not submerged If the chemical valve is on, ensure that the chemical line is
fully submerged in the chemical
Inlet line restricted All inlet connections should be snug and not kinked to reduce
the chances of pump starvation.
Inadequate water supply
Water supply to the system must meet or exceed the rated
flow (GPM) on the serial number
plate. Faucet must be completely opened or water above the
tank outlet in a gravity fed system.
Float valve stuck (optional)
If float valve is stuck in the up position, water can not enter
the float tank. Unstick valve if possible of replace if necessary.
Turbulence in float tank (optional) Excessive turbulence allows the pump to draw air into the
system. Correct excessive turbulence.
Inlet or inlet strainer clogged Regularly clean the inlet and inlet strainer to keep debris from
entering the float tank
Water supply to hot Inlet temperature should not exceed 140F - 160F range.
Inlet line vibrates
Air in system Inspect places where air can enter the system, i.e.; fittings,
hose, connections etc.
Debris in inlet check valves
If there is no float tank and the outlet line does no vibrate, the
inlet check valve may be clogged.
Remove debris. Check o-rings under valves.
Outlet line vibrates
Air in system Inspect places where air can enter the system, i.e.; fittings,
hose, connections etc.
Debris in inlet check valves
If there is no float tank and the outlet line does no vibrate, the
inlet check valve may be clogged.
Remove debris.
Pump packing bad If they show signs of ware or damage, replace them.
Inlet and outlet lines vibrate Inlet and outlet check valves
fouled
Look for the source of debris in the inlet and discharge check
valves and remove.
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