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Table 26 — Dual Master Chiller Control Parameters for Parallel Applications
Table 27 — Dual Slave Chiller Control Parameters for Parallel Applications
NOTE: If pump control is configured to OFF (Master), then Lag Unit (Slave)
Pump Control = 1. If pump control is set to any other value, then Lag Unit
(Slave) Pump Control = 0. This configuration must be set consistently for
both master and slave chillers.
DISPLAY NAME PATH VALUE
Master/Slave Select
Main Menu
Configuration Menu
Master/Slave Config
1 (Master)
Default: 0 (Disable)
Master Control Type
1=Local Control
2=Remote Control
3=CCN Control
Default: 1(Local)
Configure for proper control type.
Slave Address
Must be set to the Slave Chiller’s address. The
Master and Slave chiller must have different
addresses and be on the same Bus Number
Default: 2
Lead Lag Select
0 (Master Always Leads)
1 (Lag One Failed Only)
2 (Lead/Lag Runtime Select)
Default: 0 (Master Always Leads)
Lead/Lag Balance Delta
Range: 40 to 400 hours
Default: 168 hours
Lead/Lag Start Timer
Range: 2 to 30 minutes
Default: 10 minutes
Lead Pulldown Time
Range: 0 to 60 minutes
Default: 0 minutes
Start If Error Higher
Range: 3.0 to 18°F (1.7 to 10.0°C)
Default: 4.0°F (2.2°C)
Lag Minimum Running Time
Range: 0 to 150 minutes
Default: 0 minutes
Lag Unit Pump Control
0 (Stop If Unit Stops)
1 (Run If Unit Stops)
Default: 0 (Stop If Unit Stops)
Chiller In Series
No (Not in Series)
Default: No
DISPLAY NAME PATH VALUE
Master/Slave Select
Main Menu
Configuration Menu
Master/Slave Config
2 (Slave)
Default: 0 (Disable)
Master Control Type
1=Local Control
2=Remote Control
3=CCN Control
Default: 1(Local)
Configure for proper control type.
Slave Address
Must be set to the Slave Chiller’s address. The
master and slave chiller must have different
addresses and be on the same Bus Number
Default: 2
Lead Lag Select
0 (Master Always Leads)
1 (Lag Once Failed Only)
2 (Lead/Lag Runtime Select)
Default: 0 (Master Always Leads)
Lead/Lag Balance Delta
Range: 40 to 400 hours
Default: 168 hours
Lead/Lag Start Timer
Range: 2 to 30 minutes
Default: 10 minutes
Lead Pulldown Time
Range: 0 to 60 minutes
Default: 0 minutes
Start If Error Higher
Range: 3.0 to 18°F (1.7 to 10.0°C)
Default: 4.0°F (2.2°C)
Lag Minimum Running Time
Range: 0 to 150 minutes
Default: 0 minutes
Lag Unit Pump Control
0 (Stop If Unit Stops)
1 (Run If Unit Stops)
Default: 0 (Stop If Unit Stops)
Chiller In Series
No (Not in Series)
Default: No
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