HeatStation™ CONDENSING WATER BOILER
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34-1161 05/17
The following illustration shows how to establish a communication link between boilers:
The following parameters are used to set up your cascade operation. When boiler #1 is assigned the MSTR (Master)
identifier, Cascading will automatically be activated.
Parameter
Range
Description
ADDRESS
NONE, MSTR,
2,3,4…..,12
The ADDRESS parameter will assign a unique identifier to each
boiler. Boiler #1 should be assigned MSTR (Master). The MSTR boiler
will initiate the cascade control commands. Each consecutive boiler
should be assigned a number.
PIPING
P/S, PAR, VALV
When setting up a Cascade system, always select the P/S
(Primary/Secondary) piping regardless of the actual installed system.
CONDENSE
OFF, ON
This parameter should be preset to ON for the Heatstation but the
correct state should be verified during setup.
MOD COND
50 to 100%
For Parallel modulation, this parameter will select the burner
modulation percentage, once reached, will trigger the next boiler to
be enabled. When adjusted to 100%, cascade function effectively
becomes Sequential.
FIXED LEAD
OFF, ON
When all the boilers in the system are either condensing or non-
condensing, this parameter, when enabled will select a fixed lead
boiler.
ROT COND
OFF, ON
This parameter turns on rotation for the condensing boiler group in a
mixed system of condensing and non-condensing boilers. When
enabled, the lead boiler will be rotated every 48 hours. Consult factory
when designing such a system for additional guidance.
ROT NC
OFF, ON
This parameter turns on rotation for the non-condensing boiler group
in a mixed system.
The tN4 and GND terminals are the
communication point for the PIM.
Terminal tN4 and GND should be
connected in a daisy chain manner to
each between each boiler. Polarity
mush be respected.