Stulz C2020 User Manual

EN/07.2013/58/108
7.31. Custom 31
As standard application with the following differences.
Control
Inverter modulation on ANOUT2. Danfoss control methods are used to calculate the modulation.
Limitation of Inverter modulation depends on PC value:
If Modulation > 0 and PC > 38 bar: modulation will be the maximum between 34% and control modulation.
The condition is reset when PC < 34 bar.
If Modulation is more the 5% K1 and K3 are ON (off when modulation come back zero).
Alarms
• Inverter alarm
The parameter involved is:
– I111 SELECT RELAY INVERTER ALARM: pre-set = CA
The signal of alarm is A2 digital input. The alarm will be active with a delay of 1 second. If this alarm occurs,
the machine goes in emergency mode. The reset is manual at the fourth attempt within 4 hours. (I.e. the reset is
automatic for 3 attempts during 4 hours. If it occurs more than 3 times, the reset will be manual).
It’s possible to connect the alarm to a relay and/or to associate it to “common warning” or “common alarm” relay by
parameters I111.
In the following table the “alarm description” is shown as it will appear on the LCD during alarm condition or in the
alarm history menu.
ENGLISH WARNING INVERTER ALARM
• EEV driver alarm
The parameter involved is:
– I112 SELECT RELAY EEV DRIVER ALARM: pre-set = CA
The signal of alarm is A9 digital input. The alarm will be active with a delay of 1 second. If this alarm occurs,
the machine goes in emergency mode. The reset is manual at the fourth attempt within 4 hours. (I.e. the reset is
automatic for 3 attempts during 4 hours. If it occurs more than 3 times, the reset will be manual).
It’s possible to connect the alarm to a relay and/or to associate it to “common warning” or “common alarm” relay by
parameters I112.
In the following table the “alarm description” is shown as it will appear on the LCD during alarm condition or in the
alarm history menu.
ENGLISH WARNING EEV DRIVER ALARM
• Water flow alarm
The parameter involved is:
– I113 SELECT RELAY WATER FLOW ALARM: pre-set = CA
The signal of alarm is A3 digital input. The alarm will be active with a delay of 1 second. If this alarm occurs,
the machine goes in emergency mode. The reset is manual at the fourth attempt within 4 hours. (I.e. the reset is
automatic for 3 attempts during 4 hours. If it occurs more than 3 times, the reset will be manual).
It’s possible to connect the alarm to a relay and/or to associate it to “common warning” or “common alarm” relay by
parameters I113.
In the following table the “alarm description” is shown as it will appear on the LCD during alarm condition or in the
alarm history menu.
ENGLISH WARNING WATER FLOW ALARM
• Unit state changed: unit status change memorized on alarm history menu.

Stulz C2020 Specifications

General

Brand	Stulz
Model	C2020
Category	Controller
Language	English