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To activate a reset type, input all configuration information for that reset type in the Config
table. Then input the reset type number in the SELECT/ENABLE RESET TYPE input line.
1. Reset Type 1
(Requires optional 8-input module) — Automatic chilled water temperature
reset based on a 4 to 20 mA input signal. This type permits up to ±30° F (±16° C) of
automatic reset to the chilled water or brine temperature set point, based on the input from
a 4 to 20 mA signal. This signal is hardwired into the number one 8-input module.
If the 4-20 mA signal is externally powered from the 8-input module, the signal is wired to
terminals J1-5(+) and J1- 6(–). If the signal is to be internally powered by the 8-input module
(for example, when using variable resistance), the signal is wired to J1-7(+) and J1-6(–).
The PIC must now be configured on the Service2 table to ensure that the appropriate power
source is identified.
2. Reset Type 2
(Requires optional 8-input module) — Automatic chilled water temperature
reset based on a remote temperature sensor input. This type permits ±30° F (±16° C) of
automatic reset to the set point based on a temperature sensor wired to the number one 8-
input module (see wiring diagrams or certified drawings).
The temperature sensor must be wired to terminal J1-19 and J1-20.
To configure Reset Type 2, enter the temperature of the remote sensor at the point where
no temperature reset will occur. Next, enter the temperature at which the full amount of
reset will occur. Then, enter the maximum amount of reset required to operate the machine.