GF JRGUMAT User manual

JRGUMAT
Trouble shooting

Mixed water temperature
constantly too low
Mixed water temperature
constantly too high
Installation instructions/schematic
diagram disregarded,
or pressure rates of cold and hot water
differ
Water heater not at target temperature
JRGUMAT installed above or too close to
the water heater
Circulation connection on the JRGUMAT
not flat sealing or not properly connected
flat sealing
Too low/high volume flow through the
JRGUMAT
Slide in JRGUMAT stuck due to dirt/
deposits
Too low/high volume flow through the
JRGUMAT
Installation instructions/schematic
diagram disregarded,
or pressure rates of cold and hot water
differ
Slide in JRGUMAT stuck due to dirt/
deposits
Adjust installation according to instructions
in the manual; if not possible: install pressu-
re reducers in the cold and hot water pipes
upstream before the JRGUMAT
Check water heater, increase hot water
temperature if necessary
Install the JRGUMAT side by side with the wa-
ter heater or install thermosiphon in the hot
water pipe upstream before the JRGUMAT
Use flat sealing union or cap
Check dimension of JRGUMAT; choose
smaller/larger dimension if necessary
Replace JRGUMAT
Check dimension of JRGUMAT; choose
smaller/larger dimension if necessary
Adjust installation according to instructions
in the manual; if not possible: install pressu-
re reducers in the cold and hot water pipes
upstream before the JRGUMAT
Replace JRGUMAT
Maximum differential pressure of hot and cold
water: ~0.5 bar
Hot water temperature must be 5 K higher
than the desired mixed water temperature
Install the JRGUMAT side by side with the water
heater with a 1 metre clearance; if clearance
<1 m: install thermosiphon in the hot water pipe
Adhere to installation instructions
Use nomogram to determine the appropriate
dimension of the JRGUMAT securing a volume
flow of ±1 K target value range
Install water treatment components (filter
and/or softener)
Use nomogram to determine the appropriate
dimension of the JRGUMAT securing a volume
flow of ±1 K target value range
Maximum differential pressure of hot and cold
water: 0.5 bar
Install water treatment components (filter
and/or softener)
!Malfunction ?Possible cause Possible action Precaution
JRGUMAT – Trouble shooting
1/2
General Blocked shut-off valves and damaged
back flow preventer Check functionality of valves, replace back
flow preventer
Regular control and maintenance of all valves
37 201 62 / e / 05.17

Mixed water temperature
fluctuates
Mixed water temperature
too high after extended
periods of no tapping of
water
Mixed water temperature
too low after extended
periods of no tapping of
water
Mixed water cannot be set
to the desired temperature
JRGUMAT does not
regulate the mixed water
temperature
Very low / no volume flow of
the mixed water
Installation instructions/schematic
disregarded,
back flow preventer defective
Mixed water circulation only looped back
to water heater and not to the JRGUMAT /
circulation not calibrated
Mixed water circulation only looped back
to the JRGUMAT and not to the water
heater / circulation not calibrated
JRGUMAT with inappropriate temperature
range installed
JRGUMAT thermostat overheated
Inappropriate / no original GF JRG unions
use
Adjust installation according to instructions,
check proper function of back flow preven-
ter and replace it if necessary
Integrate JRGUMAT into circulation /
calibrate circulation
Integrate water heater into circulation /
calibrate circulation
Check temperature range of installed
JRGUMAT; install JRGUMAT with alternative
temperature range if necessary
Replace JRGUMAT
Use original GF JRG unions
Adhere to instructions in JRGUMAT manual;
regularly check whether back flow preventer
works properly
Observe the installation instructions in the
JRGUMAT manual; split circulation: about
10% to the water heater and about 90% to the
JRGUMAT
Observe the installation instructions in the
JRGUMAT manual; split circulation: about 10%
to the water heater and about 90% to the
JRGUMAT
Determine mixed water temperature and
respective temperature range before ordering
the JRGUMAT
When using soldered unions, remove
JRGUMAT before soldering; note maximum
temperature JRGUMAT may be exposed to
Order original GF JRG unions together
with the JRGUMAT.
Do not use water meter unions.
!Malfunction ? Possible cause Possible action Precaution
JRGUMAT – Trouble shooting
2/2
Für nicht erwähnte Störungen oder weitere Fragen stehen Ihnen unsere technischen Berater gerne zur Verfügung:
CH und Export: Georg Fischer JRG AG, Hauptstrasse 130, 4450 Sissach, Phone Technischer Kundendienst [phone]
Deutschland: Georg Fischer GmbH, Daimlerstrasse 6, 73095 Albershausen, Phone [phone]
Österreich: Georg Fischer GmbH, Sandgasse 16, 3130 Herzogenburg, Phone [phone]
Frankreich: Georg Fischer SAS, Bâtiment Les Rabelais, Paris Nord 2, 22 avenue des Nations, 95932 Villepinte, Téléphone [phone]
Änderungen und Irrtümer vorbehalten.
37 201 62 / e / 05.17