E528 Product Guide
Rev 8.0 12/16/2016
9
The e528.4G can be used to retrofit an application where a legacy e528 was used. Follow the procedure
below:
4G to 2G Standalone application: with/without door switch input (no backhaul network)
•
Using the adapter (P/N 203-013) connect the harness from
the wall box (P/N 62-1462) previously connected to the
thermostat being replaced to H1 of the adapter
(see Figure 8).
•
Connect the harness of 203-013 to the low voltage
comm/device connection of the e528.4G.
Molex 10-position female socket
: This female socket
accepts the provided 10-pin Molex connector pre-wired with 8-
inch, color-coded wiring leads. These leads should be
connected to the 24VAC or 100–277VAC power, valve/fan
control wiring from the FCU, or other HVAC device with wire
nuts inside in the wall junction box in accordance with the
wiring diagram provided by INNCOM.
Note: For installations in which all leads are not required,
the extraneous leads should be cut off at the Molex
connector.
Figure 8 shows the pinout for the 10-position Molex male connector supplied with all relay output models
of the thermostat. The end view of the male connector from the wire insertion side with the pin numbers is
indicated. This is the same as looking at the female connector point on the back of the e528.
Typical functions for each wire are listed in Tables 4 and 5. For specifics, refer to the as-built wiring
diagrams.
Figure 8 E528.4G to 2G standalone application
