Honeywell S4965V3250 Functional Description page 11

Title: Functional description S4965V3250
When an EBM fan with 3 wire interface (230 VAC) is being used, an external pull up resistor MUST be used.
The connection and value of the pull up resistor is shown on below picture:

The pull up voltage MUST be taken from the ESYS control;

Resistors must be mounted externally by OEM/Installer;

No lower resistance values are allowed.
Honeywell premix engine fan interface and EBM fan 4 wire interface (BG3612 – 230 VAC), do not need any external pull up
resistor for PWM output signal.
Power supply (24V) for fan interface must be taken from ESYS control (X3 Pin 9).
First issue.
SW update and add parameter into list ModBus communication.
Fig. 3 - PWM pull up connection.
Description
Heating & Cooling Appliance Controls
Doc.: S4965V3250E20
Sign. E.C.N.
I.Mariscak 0131527
I.Mariscak
Honeywell
Date Rev.
27-Jun-2016 A
03-Aug-2016 B
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