OM 780-2 Page 31
Table 7. Chiller Unit Controller Setup Variables
Chiller Controller Variable Value Description
Protocol Lon The CSM communicates with MTII chillers through the chiller’s LONWORKS
communication module
Source Network The chiller must allow the LONWORKS network control
Mode Cool (not Ice or Cool/Ice) The CSM does not support the Heat, Ice or Cool/Ice modes
Start Delta 1°F (0.6°C) Reduce the temp difference required for starting in this multiple chiller system
Max Pull Down 2°F (1.1°C)
Soft Load Off Soft Load control is supplied through the CSM
Evap Pump Recirculate Timer
(MTII Centrifugal Chillers)
0.5 min (this is the default) A compressor must transition from Off to Starting within 3 minutes after being
enabled or the CSM will consider it off-line
CAUTION
During the network commissioning process, set the chiller unit controller’s SOURCE variable to “Switches” to disable
the chiller. If the network is being commissioned before a particular chiller has been commissioned, that chiller’s
SOURCE must be set to “Switches” to prevent it from starting.
To Next Page
Loading...
Need help?
General
