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4.3.3 Timer settings (step three)
The Grundfos timer control is designed only for
use with specified Grundfos UP circulators
installed in indoor hot water service systems.
The timer control is designed to turn the
circulator on and off at preset times, allowing the
user to select operation of the circulator during
high use periods of the day.
Before the circulator is started, the
Note
system must be filled with liquid
and vented.
To set the actual time of the day:
1. Turn the programming ring in the direction of
the arrow, located on the timer face, until the
timing arrow points to the desired time.
2. Insert the 115 V plug on the line cord from
the pump into a properly grounded 115 V
outlet. Be sure to route the power cord so
that it does not touch the exhaust vent or
piping from gas/oil fired hot water heater.
The circulator will now start and is ready for
timer settings selection.
Timer settings with three control options:
1. Option one: 24 hours/day, 7 days/week
(continuous pumping)
Set the manual switch in the "ON" position.
In this mode, the pump will not be controlled
by the programming tab settings.
2. Option two: Pumping controlled by
specific times of the day
Set the manual switch in the "TIMER"
position. To set the specific "ON" and "OFF"
times during the day, located on the
programming ring, push the programming
tabs either towards or away from the center
of the ring.
Note that:
•
Tabs pushed away from the center ring
indicate the circulator is switched "ON".
•
Tabs pushed towards the center ring indicate
the circulator is switched "OFF".
•
Each programming tab equals 15 minutes.
•
In case of power outage, the timer will not
keep time. After power has been restored,
reset the timer (see instructions in section
4.3.3 Timer settings (step
actual time of the
day:).
3. Option three: No pumping
Set the manual switch in the "OFF" position.
In this mode the circulator will not be
pumping. The timer will still keep the time of
day.
5. Maintenance and service
Grundfos Comfort System is maintenance free;
no service is required.
three);
To set the
Timing
arrow
Fig. 8
Timer components
Programming
tabs flip
forward to
"Off" position
Fig. 9
Setting the timer with programming
tab
Programming
tabs
Manual
switch
Programming
tabs
7
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