E528 Product Guide
Rev 8.0 12/16/2016 2
Overview and
General Concepts
INNCOM's e4 Smart Digital Thermostat is a powerful, multi-purpose Direct
Digital Control (DDC) device that can control virtually any HVAC system found
in hotel guestrooms.
The three e4 models meet different application requirements. The e528 and
e527 are wired and are typically used for new installation. The e529 is battery-
powered and is designed to meet the needs of existing properties where
rewiring is not practicable.
This document describes Model e528; information on the e529 and e527 can
be found in their respective product guides.
Application
In its most basic form, the e528 functions as a programmable DDC thermostat,
automatically adjusting fan speeds and valves to achieve set temperature
(Note: Guests can manually select heat or cool by pressing the OFF/AUTO
button and cycling through OFF, AUTO, HEAT and COOL). The e528 is also
an “intelligent” device capable of linking ancillary sensors and serving as an
information gateway. For example, coupled with a magnetic door switch (wired
or wireless), motion detectors, and other devices, the e528 becomes the brain
of a highly effective Energy Management System (EMS) application,
communicating EMS information requirements to central servers. It comes
standard with five relays and can be equipped with an on-board Infrared (IR) or
radio frequency (RF) transceiver and Passive Infrared (PIR) motion detector.
The e528 interfaces with all common HVAC unit voltage configurations (24 volt
to 277 volt). The e528 can be installed in a wired or wireless INNCOM
guestroom control system, which makes installation feasible and affordable in
either new construction or retrofit installations.
Through interfaces with other devices and sensors, the e528 supports the
following functions:
Figure 1. E528 Digital Thermostat
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