Stulz EC Tower ECD 91 - Setting the circuit-breaker

62 EN/01.2019/G22 © STULZ GmbH – all rights reserved
EC TOWER TECHNICAL MANUAL
Table: Settings of circuit-breakers for EC Tower sizes 1 and 2
EC Tower model ECD/U
Size 1 Size 2
91 181 251
Outdoor unit
SRC 50
ZSS/ZSXS
FDC 71 VNX
FDC 140
VSA/VNA
FDC 140
VSX
FDC 200
VSA
FDC 250
VSA
Circuit-
breaker
Designation Setting [A] Setting [A]
F20 Circuit-breaker 14.5 4.0 4.0
F31 Fan – 6.3 6.3
F41
Electrical supply to MHI
outdoor unit
Fuse F41: 16AD 10.0 10.0 12.0 16.0
F70 Steam humidifier – 7.0 11.2
F71 Electric heater stage 1 – 8.7 8.7
F72 Electric heater stage 2 – 8.7 8.7
Setting the circuit-breaker
Procedure
1. Using the screw, set the circuit-breaker as shown in the
table below.
2. Switch on the control fuses and circuit-breakers of the fan
and electric heater one after the other.
3. Close the door of junction box 1.
4. Switch on the EC Tower via the master switch. The home
screen appears on the C7000AT controller.
- Power is now being supplied to the controller and you
can carry out the required settings.
5. Make sure the outdoor unit is functioning.
Circuit-
breaker on
Screw
Non-calibrated range
NOTICE
Do not turn the setting screw for the trip current beyond the end of the calibrated range.
Non-compliance with the above will cause overheating and a short-circuit in the load or irrepa-
rable damage to the circuit-breaker.