Goetze 2980 Instrucciones De Servicio, Montaje Y Mantenimiento página 16

ately or professionally repaired, in order to ensure continued safe operation. Repairs to
pressure build-up regulators must be performed only by Goetze KG Armaturen or by
authorised specialist workshops, using only genuine spare parts. Makeshift repairs of any
kind are not permitted!
Fault
Leakage at the
connection
points of the
pressure build-
up regulator
Reduced flow
rate
Working pressu-
re drops below
the set value
Working pressu-
re exceeds the
set value
9
Disassembly of the fitting
Hazard warning: Leaking operating medium can lead to burns, poisoning and irri-
tations; take appropriate measures to prevent any hazards. Be aware that residue
may run off! Suitable and sufficient personal protective equipment must be worn!
Only qualified persons may remove the pressure build-up regulator from the pipe. For this
purpose, the system or system part and the pipe system with the pressure build-up
regulator must be depressurised. The operating medium and the fitting must be at ambi-
ent temperature. Only remove the pressure build-up regulator from the pipe system
Assembly and maintenance instructions - 2980
Possible cause
•
Contamination or damage
of the sealing surfaces
• Screw fitting/union units
loosened
• Filter screens conta-
minated
• Bellow defective or blocked
by ice formation
• Pressure build-up evapora-
tor frozen
• Working pressure setting
changed
• Valve plug of the pressure
build-up regulator blocked
by frozen medium
• Media consumption stop-
ped (e.g. shutdown)
• Safety function activated
after refuelling
Solution
Check the sealing surfaces; if neces-

sary, replace the pressure build-up
regulator
Observe the tightening torques in

section 5
Clean or replace the filter screens

Install replacement valve or isolate

and thaw blocked pressure build-up
regulator
Replace bellow

Reduce the consumption quantity un-

til the evaporator is mostly defrosted
Adjust working pressure according

to section 7
Install replacement valve or isolate

and thaw blocked pressure build-up
regulator
Ensure basic inspection is performed

Isolate the pressure build-up regulator

by closing shut-off valves upstream
and downstream of the regulator;
reduce tank pressure by tapping
or draining. After reaching the set
working pressure, open shut-off
valves again
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