Stulz EC Tower ECD 91 - 6.3 Setting the outdoor unit model on DIP switch S1

154 EN/01.2019/G22 © STULZ GmbH – all rights reserved
ec tower technical manual
6.2.2 Setting the functions for Program 8 on DIP switch S2
The following table lists the functions for Program 8 in brief. See „4. InterfaceIIIk functions“ for a detailed
description of the functions.
DIP switch Status Function
S21
ON
OFF
Interface
IIIk is master
Interface
IIIk is slave
S22
ON
OFF
X4b-K2, operating signal; X4c-K3, heating signal
X4b-K2, compressor signal; X4c-K3, defrost signal
S23 | S24 No function, switch setting is always OFF
S25
ON
OFF
Forced mode
No function
S26
ON
OFF
All digital outputs are closed without a signal (NC)
All digital outputs are open without a signal (NO)
S27
ON
OFF
Setting determines the value that is shown on the 7-segment display (see “3.5 7-segment
display“ on page 149).
S28
ON
OFF
Setting determines the value that is shown on the 7-segment display (see “3.5 7-segment
display“ on page 149).
6.3 Setting the outdoor unit model on DIP switch S1
6.3.1 For FDC outdoor units: Setting DIP switch S1 on the Interface III k
Procedure for FDC outdoor units
1. On the outdoor unit board of the FDC outdoor unit, set DIP switch SW43 to ON (see other applicable
documents: FDC series Technical Manual).
2. Define which FDC outdoor unit is installed on site (see “Table 1: Setting the outdoor unit model with DIP
switches S15 to S18“ on page 155).
3. Set DIP switches S15 to S18 in line with the FDC outdoor unit installed on site (see “Table 1: Setting the
outdoor unit model with DIP switches S15 to S18“ on page 155).
6.3.2 For SRC outdoor units: Setting DIP switch S1 on the Interface III k
NOTE

Procedure for SRC outdoor units
1. Replace the Thi-A sensor with a 5k fixed resistor (see other applicable documents: Technical Manual for
heat exchanger connection module).
2. Set the temperature setpoint on the wired remote control:
 18°C.
 30 °C.
3. Lock the wired remote control to prevent the temperature setpoint from being changed.
Alternatively: Disable the wired remote control via a signal to digital input X2b-D3. The InterfaceIIIk is
set to Center.