T775P Series 2000 Electronic
Controller Model Description
The T775P model can be used to stage multiple relays from a single heat or cool setpoint. The number of stages can be freely chosen, limited
by the number of relays available (up to 12 stages [11 if using the pump output] using two T775S expansion modules).
The T775P provides a pump output using the last of the four SPDT relay outputs on the T775P controller. When T775S Expansion Modules are
used, the configurable pump output is the last relay output of the last expansion module. The pump output will be either stage 4, 8, or 12,
depending on whether T775S Expansion module(s) are used.
The T775P includes a digital input for use with the disable or setback option.
Table 1. T775P Controller Configuration.
The T775 electronic stand-alone controllers are the next
generation of commercial and agricultural controls
capable of remote sensing of temperature and providing
switched and/or proportional outputs to various types of
loads. A built-in time clock is standard.
The T775P can be configured with or without Reset
control from a single heat or cool setpoint.
Three sensors are configurable. In normal installations,
Sensor A is the supply controlled temperature, Sensor B
is the outdoor controlling (reset) temperature, and
Sensor C is the return controlled temperature, which can
be used for the Differential alarm and/or as the controlled
The T775P can be configured with up to two T775S
Expansion Modules for a maximum of up to 12 stages
with the last stage being an option for a pump stage.
The T775P is an operating control, not a limit or
safety control. If used in applications requiring
safety or limit controls, a separate safety or limit
control device is required.