Engineering manual - UniSAB III 1.10.8
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001930 en 2021.06
Troubleshooting
Version no. Description
1.0.9.0
A new screw compressor type, SAB 157 HR, is introduced. It is a new short high-pres-
sure screw compressor for heat pump (NH
3
) and CO
2
operation. Design pressure is
maximum 60 bar, it has no capacity slide but a relief valve for unloading, for VSD con-
trol only i.e. 1000-6000 rpm, no volume slide but a number of fixed Vi ratio.
An E-mail function is introduced in UniSAB III. This function makes it possible for Uni-
SAB III to report compressor operation and events, i.e. shutdowns or alarms, for the
central remote monitoring. With the E-mail function it is also possible to enable UniSAB
III to send event mail to four User specified e-mail addresses. Events can be e-mails in
case of shutdown or alarm.
A Pay function has been introduced in UniSAB III. In the future some new UniSAB III
customer related functions will be blocked until they are activated by entering a unique
four digit password. This password can be acquired from Sabroe sales.
A general maintenance module has been introduced in UniSAB III. It gives static serv-
ice time information for screw and reciprocating compressors.
The COP (Coefficient of Performance) function is now available. To use the COP func-
tion it must be configured. It requires the connection of a motor power meter and a flow
meter. It can be used as an indication of the relative performance of the compressor
and therefore as a measure for the actual condition of the compressor. See the UniSAB
III COP manual.
For SMC/HPC/TSMC with frequency drive it is now possible to set the minimum limit
for "Motor rpm min 2" down to 500 rpm. The default setting remains at 700 rpm.
For RecipRota, i.e. reciprocating compressors mounted with frequency drive, a new
and softer type of coupling is introduced for type CMO/HPO/TCMO. This soft coupling
type requires that the compressor is unloaded in a symmetrical way. This restriction
limits the number of unloading steps. As a consequence a new unloading function with
fewer unloading steps has been implemented in UniSAB III. See section 3.4.6
The function Cap down blocked is now made configurable. The function must be acti-
vated i.e. set to Yes, before it can be used. It is deactivated as default. This change is
made to avoid a conflict with the chiller configuration point Flow Condenser, as they
both use the same digital input, DI11. See the Engineering manual, subsections 3.5.3
and 3.6.7
The display contrast has been improved for F-keys and cursor. The contrast compen-
sation for temperature has been improved and UniSAB III will now detect the display
version for automatic setting of optimum contrast value.
For Profibus Extended protocol the asynchronous part of the Measurements database
has been extended to contain the same number of data as found in the Modbus TCP
protocol.
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