What's New; New Controller Features; New Operator Console Features - Pentair 920 Series Installation, Operating And Maintenance Instructions

What's neW

neW ControLLer features

neW operator ConsoLe features

Important WarnInGs and notes
INDUSTRIAL HEAT TRACING SOLUTIONS
This section provides a summary of the new features that have been added since the last version
of this manual was printed. It is assumed that the reader is already familiar with the earlier
versions of the 920 Controller.
• Alarm filtering is now available for:
– LOW and HIGH TS ALARMS (see sections 3.7.7 on page 33 and 3.7.8 on page 34)
– LOW and HIGH CURRENT ALARMS (see sections 3.8.2 on page 35 and 3.8.4 on page 36)
– HIGH GFI ALARMS (see section 3.8.6 on page 36)
– LOW and HIGH VOLTAGE ALARMS (see sections 3.8.9 on page 37 and 3.8.11 on page 38)
– LOW and HIGH RESISTANCE ALARMS (see sections 3.8.13 on page 38 and 3.8.15 on page 39).
Alarm filtering will prevent an alarm from being indicated until the alarm condition has existed for
the duration of the alarm filter time.
• Two new SWITCH CONTROL MODES have been added for use with Ambient Temperature control:
– Proportional Ambient SSR
– Proportional Ambient Contactor (see sections 3.5.3 on page 21 and 5.2 on page 50).
• ASCII and RTU ModBus™ communications protocol support (see section 3.9.1 on page 42).
• Support for an isolated, 2-wire RS-485 communications interface (see section 1.4.5).
• A 3-phase power calculation feature has been included for use with balanced, Y-connected
heating loads (see section 3.5.10 on page 23).
• A Temperature Sensor (TS) Fail Mode feature is now available to allow the output to be forced
ON or OFF when a control temperature failure occurs (see section 3.5.11 on page 23).
• A TEMPBUS™ feature to allow one "master" 920 controller to share its temperature sensor
information with up to 25 "slave" controllers (up to 50 control points). This includes the addition
of three TS CONTROL MODES (see sections 3.5.12 on page 24 and 5.4 on page 53).
• Support for 100 ohm nickel-iron RTDs along with the standard 100 ohm platinum types (see
sections 3.5.13 on page 24 and 3.5.16 on page 25).
• Manual voltage source selection (see section 3.5.19 on page 26).
• Support for FORCE ON and FORCE OFF modes using the EXTERNAL input (see sections 3.5.27
on page 28 and 3.6.3 on page 29).
• Features to reload factory default parameters as well as copy configuration parameters from
one point to another are now included (see section 3.11 on page 46).
• New maintenance alarming to track contactor wear (see section 3.8.23 on page 42).
• Monitor PEAK LOAD CURRENT, PEAK GFI, and the EXTERNAL INPUT STATUS through
communications (see sections 4.3.6 on page 50, 4.3.7 on page 50, and 4.3.8 on page 50).
• The ability to adjust the display scroll rate is now available (see section 3.6.10 on page 31).
• Maintenance data resetting is now supported (see section 4.3 on page 49).
• Display and reset the CONTACTOR CYCLE COUNTER (see section 4.3.3 on page 49).
• Limit the range of the CONTROL SETPOINT setting for 920 Operator Console users
(see sections 3.5.29 on page 29 and 3.5.30 on page 29).
• An UNLOCK DATABASE feature was added to the 920 Operator Console's "Configuration Mode
Main Menu" (see section 3.10.3 on page 46).
• The display test no longer occurs at startup; instead, the user may activate it from a menu
option (see section 3.10.5 on page 46).
The following icons are used extensively throughout this manual to alert you to important
warnings that affect safety and to important notes
unit.
Be sure to read and follow them carefully.
EN- Raychem920series-IM-H56874 05/15
that affect the proper operation of the
5 / 82