Teamwork Mode 2; Typical Lead/Lag (Running/Standby) Function; Unit Lead/Lag Or Running/Standby Functions - Emerson Liebert iCOM Training And Service Manual

iCOM
Controls Training and Service Manual

Teamwork Mode 2

In teamwork mode 2 all system parameters are shared equally as in teamwork
mode 1. The lead unit will average the temperature and humidity of all connected
units. Each unit operates on its own sensors for their operational needs if there is
a request for cooling, heating, dehumidification or humidification.
• Autoset will not automatically adjust the proportional band
• Uses the average temperature and humidity readings to release all units to
operate in Cooling, Heating, Humidification, or Dehumidification
• Each unit in the network operates on its own temperature and humidity
sensors
• Opposite operational functions prevented (stops fighting)
• Standby – Lead/Lag allowed
• No Cascade of standby unit(s)
• If the switch used in the network fails, all units will run independently
Unit Lead/Lag or Running/Standby Function
This program will allow the user to select the multi-unit function of Lead – Lag
operation of the networked unit (sometimes called Running and Standby). By
selecting the number of running and standby units, you can to provide the
redundancy needed in controlling the conditioned space.

Typical Lead/Lag (Running/Standby) Function

The lead/lag operational sequence has a lead (running) unit(s) operating. If an
alarm becomes active, the active alarm will cause the first lag (standby) unit to
active and maintain the space conditions. If multiple units are selected as lag
(standby) the units will continue to rotate on active alarms as long as a lag unit is
available. If there are no lag (standby) units left in the sequence the first failed will
restart (if not in a critical alarm state i.e. fan overload, etc).
The lag unit will start one minute after the alarm has sounded. The unit with the
active alarm will operate in the fan only mode for 3 minutes before going into a
standby mode to stabilize its internal conditions, and then it will turn off.
The Lead/Lag function may be used in the No Teamwork Mode, Teamwork 1
Mode, or Teamwork 2 Mode. One or more units can be defined as lag (standby),
the normal status of the lag (standby) unit(s) is off.
The lag or standby function can be performed as a daily rotation (setting the time),
weekly rotation (setting the day of the week and time) or as a monthly rotation.
The units will rotate based on the programmed number of units.
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