Camus Hydronics MICOFLAME GRANDE Series Installation, Operation And Service Manual page 25

Tekmar sequencing control (275). The control
turns on the boiler pump and adjusts the number
of stages being fired in proportion to the analog
input signal. Note: Existing Tekmar sequencing
control (264, 268) can be used to control the
boiler staging. In this case, the BTC turns on the
boiler pump and Stage 1 when an external heat
demand is present. Stage 2, 3, and 4 are
controlled by the sequencing 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 control 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.
Mode 7 A removable jumper is provided in the
electrical enclosure across the contacts to be
used for connection to the remote operator. Heat
demand provided via external analog input
signal from EMS or tN4 system control (e.g.
420). The control turns on the boiler pump and
operates the boiler to maintain the boiler target
at the boiler inlet sensor whenever a 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 control turns off the appliance
pump.
Mode 8 A removable jumper is provided in the
electrical enclosure across the contacts to be
used for connection to the remote operator. Heat
demand provided via external analog input
signal from EMS or tN4 system control (e.g.
420). The control turns on the boiler pump and
operates the boiler to maintain the boiler target
at the system sensor whenever a 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 control turns off the appliance
pump.
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