joule Thermalstore 1.0, Installation Manual

Page: 59 / 68

59
Fault Possible Cause Solution
Water escaping from the case
unit. Compression fi tting on hot -
draw off not sealing.
Check / remake joint sealing
paste.
Cold water at hot tops. Immersion heater not switched
on or cutout has triggered. Check / reset.
Indirect - Boiler not working. Check boiler - consult boiler
manufactures’ instructions.
Indirect - motorized valve fault. Check plumbing / wiring
motorized valve.
Indirect - cutout in dual stat has
operated. Check outlet pressure from inlet
control set is 3 bar.
Water discharges from expan-
sion relief valve If continual - pressure reducing
valve (part of inlet control set )
mayno tbe operating correctly. Check outlet pressure from inlet
control set is 3 bar.
If continual - expansion relief
valve seat may be damaged. Remove cartridge - check seat
and renew if necessary.
If intermittent - expansion vessel
charge may have reduced /
bladder perished. Check pressure in expansion
bessel. Recharge to 3 bar if
necessary. If bladder perished
replace vessel.
Unit is being back pressurized. With cylinder cold check pres-
sure in cylinder. If this is the
same as the incoming mains
pressure then you are getting
backfeed. Install a balanced cold
supply.
Water discharges from tempera-
ture & pressure relief valve Unit has overheated - thermal
controls have failed. Switched off power to boiler and
immersion heaters. Leave water
supply on. Wait until discharges
stops. Isolate water supply and
replace if faulty.
Milky / cloudy water Oxygenated Water. Water from any pressurized sys-
tem will release oxygen bubbles
when fl owing. The bubbles will
settle out.
No hot water fl ow Cold main off . Check and open stopcock.
Strainer blocked in pressure
reducing valve. Isolate water supply and clean.
Inlet control set may be fi tted
incorrectly. Check and refi t required.
Noise during hot water draw off -
typically worse in the morning Loose airing cupboard pipework. Install extra clips.
Hot or warm water from cold tap If tap runs cold after a minute
or so the pipe is picking up heat
from heating pipework. Insulate/re-route.