16
settings allow the control to return to
normal operation on its own.
2. Mode 1 is intended for hydronic heating.
The set-point for inlet water control is
pre-set to 180°F and the auto re-set limit
is set to 230°F. The inlet set-point can
be adjusted, however the limit is fixed.
In addition to the auto reset limit the
factory installs a manual re-set limit set
to 250°F. The control turns on the
appliance pump and stages the
appliance to maintain set-point target
temperature at the appliance inlet
temperature whenever an external heat
demand is present. Once the external
heat demand is removed, the control
turns off the appliance and operates the
appliance pump based on the purge
feature
3. Mode 2 is intended for hydronic heating.
The set-point for inlet water control is
pre-set to 180°F and the auto re-set limit
is set to 230°F. The inlet set-point can
be adjusted, however the limit is fixed.
In addition to the auto reset limit the
factory installs a manual re-set limit set
to 250°F. The control turns on the
appliance pump and stages the
appliance to maintain set-point target
temperature at the appliance inlet
temperature whenever an external heat
demand is present. Once the external
heat demand is removed, the control
turns off the appliance and operates the
appliance pump based on the purge
feature. The control turns on the
appliance pump and stages the
appliance to the set-point target
temperature at the system temperature
whenever an external heat demand is
present. Once the last appliance stage
turns off and the heat demand is still
present, the control then operates the
appliance pump based on the purge
feature. In this case, it is imperative that
the system pump operates continuously
in order to provide constant circulation
past the system sensor. The appliance
pump then turns back on with the first
stage of the appliance. If the heat
demand is removed, the appliance is
turned off and the control operates the
appliance pump P1 based on the purge
feature.
4. Mode 3 is intended for domestic water
heating. The set-point for inlet water
control is pre-set to 140°F and the auto
re-set limit is set to 200°F. The inlet set-
point can be adjusted, however the limit
is fixed. In addition to the auto reset limit
the factory installs a manual re-set limit
set to 210°F. The control turns on the
appliance pump and stages the
appliance to maintain set-point target
temperature at the appliance inlet
temperature. An internal demand is
generated from the DHW sensor which
could be placed in the storage tank
while the external heat demand is
permanently wired or through a timer.
Once the DHW tank is satisfied (internal
demand is removed), the control turns
off the appliance and operates the
appliance pump based on the purge
feature.
Summary of Contents for MicoFlame Grande MFH2000
Page 14: ...12 Figure 7 Typical Heating System Figure 8 Typical Low Water Temperature System...
Page 15: ...13 Figure 9 Typical Instantaneous Water System Figure 10 Typical Water Heating System...
Page 16: ...14 Figure 11 Typical Water Heating System...
Page 30: ...28...
Page 31: ...29...
Page 32: ...30 16 EXPLODED VIEW MicoFlame Grande...
Page 33: ...31 17 EXPLODED VIEW MicoFlame Grande Outdoor and or Condensing...