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Operation and Maintenance
Envistar Compact
DSEC191101.01.EN
Continuous product development may give rise to specification changes without notice.
Additional maintenance for Thermoguard (code ECET-TV)
1. The ThermoGuard coil must be fitted with a safety valve, the function of
which should be checked regularly (at least once a year). If you see that the
valve is leaking, this is normally due to impurities from the pipe system that
have accumulated on the valve seat.
In normal cases, it is sufficient to carefully turn the valve knob and in this
way “flush” the valve seat clean. If the safety valve continues to leak, you will
have to replace it with a new one of the same type and with the same ope-
ning pressure.
2. Any shut-off valves on the supply or return lines may not be closed if free-
zing temperatures are likely.
3. If a Thermoguard coil has frozen, let it thaw completely before restarting
operation. If the heat recovery unit is installed upstream of the coil, it is often
sufficient to run heat recovery to thaw the coil. If this does not work, some
other external heating source will have to be used for thawing the water coil.
NB!
To ensure correct ThermoGuard coil function, the entire coil must be
allowed to thaw before returning it to full operation. Make sure that
water is circulating in the entire coil when you start it up.
