Installation / Operation Instruction Manual

Table Of Contents
Page 78
CONFIGURATION
8.D.4.d Redundancy
To navigate to the Cascade Redundancy Screen, touch the Cascade Icon on the Conguration Screen, then touch the
Redundancy Icon on the Cascade Conguration Screen.
The Cascade Redundancy Screen allows the selection of one of three options for redundancy in cascade systems.
These options are:
Boiler Internal Set Point – In a cascade conguration, upon loss of communication with the Lead unit, the Lag units
will continue to operate in the same manner as when the communication stopped. For example, if a Lag unit was
ring to satisfy a cascade heat demand, it will continue to satisfy the heat demand upon loss of communication with
the Leader.
Redundant Lead – In a cascade conguration, upon loss of communication with the Lead unit, a second unit will
assume Lead responsibilities.
Disable Redundancy – In a cascade conguration, upon loss of communication with the Lead unit, Lag units will no
longer satisfy the cascade heat demand.
8.D.5 Hybrid
To navigate to the Hybrid Conguration Screen, touch the Hybrid Icon on the Conguration Screen.
The Hybrid Conguration Screen allows adjustment of the following parameters:
Hybrid Enable – This parameter allows Hybrid Mode to be enabled or disabled.
Lag Mode – This parameter allows Lag Mode to be enabled or disabled.
Hybrid Set Point – Based on the system return temperature, with Hybrid Mode enabled, this temperature set point
determines which type of boiler (condensing or non-condensing) runs rst to satisfy a heat demand.
•HybridDi󰀨erential– This parameter is a +/- o󰀨set of the Hybrid Set Point used to prevent condensing in non-
condensing units.
Hybrid Delay – This parameter is a time delay that, in addition to Hybrid Di󰀨erential, is used to prevent condensing
in non-condensing units.