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English (US)
6. Startup
7. Operation
Grundfos domestic circulator pumps, installed
properly and sized for correct performance, will
operate quietly and efficiently and provide years
of service.
UPS
model pumps are multispeed, and the
speed can be changed via a speed selector
switch located on the front of the terminal box.
UP
models are single-speed.
8. Troubleshooting
8.1 Failure to operate
When UP and UPS 15, 26, 43, and 50 pumps
are first started, the shaft may rotate slowly until
water has fully penetrated the bearings.
If the pump does not run, the shaft can be
rotated manually. To accomplish this, switch off
the power supply, and close the isolation valves
on each side of the pump. Remove the indicator
plug in the middle of the nameplate. Insert a
small flat-blade screwdriver into the end of the
shaft, and gently turn until the shaft moves
freely. Replace and tighten the plug. Open the
isolating valves and wait 2 to 3 minutes for the
system pressure to equalize before starting the
pump.
9. Disposal
This product or parts of it must be disposed of in
an environmentally sound way:
1. Use the public or private waste collection
service.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
Subject to alterations.
Caution
Do not use the pump to vent the
system.
Caution
Do not start the pump before filling
the system.
Caution
Never let the pump run dry.
Caution
Under no circumstances should the
pump be operated without water
circulation or without the minimum
required inlet pressure for prolonged
periods of time.
This could result in motor and pump
damage.
Note
After a long shutdown period, multi-
speed pumps should be started on
speed 3 and then adjusted to the
regular setting.
The UPS 15-42 has an automatic
function to assist in restarting.
