Grundfos Comfort 595916, Installation And Operating Instructions Manual

7

English (US)

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.

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 three)

;

To set the 

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.

Fig. 8

Timer components

Fig. 9

Setting the timer with programming 
tab

5. Maintenance and service

Grundfos Comfort System is maintenance free; 
no service is required.

Note

Before the circulator is started, the 
system must be filled with liquid 
and vented.

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Timing

arrow

Programming 
tabs

Manual 
switch

Programming 
tabs

Programming

tabs flip

forward to

"Off" position