Temperature Control; Low Water Level Protection (Flow And Content); High Limit Protection; Air Pressure Differential Sensor (Lds) - REMEHA Gas 310 ECO Technical Information

The boiler fuse F is located behind / next to the 230V
a
terminal strip. This fuse de-energises the whole boiler and
has a rating of 10 AT.
The fan has Power Factor Control (PFC ensures that the
mains supply is distributed more uniformly) and is fused
with a 6.3 AT fuse F (behind / next to the 230V terminal
b
strip).
fig. 15 Position Fuses F

8.2.5 Temperature control

The Remeha Gas 310 ECO is equipped with electronic
temperature control based on flow, return, boiler block
and flue gas temperature sensors. The flow temperature
is adjustable between 20 and 90° (factory setting 90°).

8.2.6 Low water level protection (flow and content)

The Remeha Gas 310 ECO is equipped with low water
protection based on temperature differences (dT)
between flow and return. When the dT = 25° (fac-
tory setting) the boiler starts modulating down so that it
remains operational as long as possible. When the dT =
40° the boiler will be at part load. If the dT continues to
rise and reaches 45°, the boiler shuts down (not a boiler
failure, see section 12.4) and will restart when conditions
return to normal.
If the boiler is fired dry, it will go to high temperature lock
out, failure code (&.
Supplied By www.heating spares.co Tel. 0161 620 6677
and F
a b

8.2.7 High limit protection

The high limit temperature protection device switches
off and locks out the boiler (showing a flashing fault
code, see section 14.4 for details) when the flow tem-
perature exceeds the high limit set point (adjustable
parameter, see section 13.2.10). When the fault is cor-
rected, the boiler can be restarted by using the reset-
key on the control panel.

8.2.8 Air pressure differential sensor (LDS)

At the start of a heat demand the system checks
whether the LDS input is open. If not, there are (max.)
4 restarts, before the boiler is locked out (E61).
If the LDS input is open, the fan will speed up and a
pressure difference is built up across the boiler. When
the LDS control speed is reached the LDS input must
close. If not, there are (max.) 4 restarts, before the
boiler is locked out (E08).
Once started the LDS function is switched off for mod-
ulation purposes.
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