Camus Hydronics MicoFlame Grande MFH2000 Installation, Operation And Service Manual - page 19
17
5. Mode 4 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 outdoor reset
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.
6. Mode 5 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 outdoor reset
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
based on the purge feature.
7. Mode 6 is intended for multiple
appliance application and all stages are
closed at all times. In essence there is
no operator at the appliance. A
removable jumper is provided in the
electrical enclosure across the contacts
to be used for connection to the remote
operator. The fixed auto re-set limit is
set to 230 °F. In addition to the auto
reset limit the factory installs a manual
re-set limit set to 250 °F. The control
provides pump operation. Staging
operation is provided by an external
sequencing control. Heat demand is
provided to the external sequencing
control. External sequencing control
then provides heat demand to the
control. Each control turns on its
respective appliance pump and stage 1
contact whenever an external heat
demand is present. Once the external
heat demand is removed from the
control, the control turns off the stage 1
contact and operates the pump to
provide purging. Once the purge period
is complete, the c turns off the appliance
pump.
If this setting is inadvertently chosen the
appliance will cycle on the limits. There is a
danger of scalding if this setting is used in a
DHW application.