Armstrong 3750 User Manual

3750 Pulpress
Pressurisation
unit
Installation and
operating instructions
File No: 37.856iec
Date: may 19, 2020
Supersedes: 37.856iec
Date: november 28, 2019

Armstrong 3750 Specifications

General

Brand	Armstrong
Model	3750
Category	Control Unit
Language	English

Summary

4.0 WARNING SYMBOLS

5.0 SAFETY INSTRUCTION

Equipment Safety Guidelines

Guidelines for safe installation, handling, and operation of the unit.

12.0 PROTECTION

14.0 INSTALLATION

14.1 MECHANICAL Installation

Mechanical aspects of unit installation.

14.2 ELECTRICAL Installation

Electrical aspects of unit installation.

15.0 SAFETY REGULATIONS

16.0 COMMISSIONING

17.0 OPERATION

20.0 CONTROLLER FUNCTIONS

21.0 FUNCTIONAL DISPLAY

21.1 OPERATION SCREENS

ALARMS

21.2 SETUP SCREENS

22.0 PARAMETERS

TWIN SYSTEM PARAMETERS

23.0 WARNINGS AND ALARMS

Break Tank Water Level Alarms

Alarms for low or high water level in the break tank.

System Pressure and Transducer Alarms

Alarms for low/high system pressure and transducer failure.

Pump and Boiler Interlock Alarms

Alarms for pump trips, run time, excessive starts, and boiler interlocks.

System Communication and Service Alarms

Alarms for module communication loss and service reminders.

24.0 ALARM LIST

TWIN SYSTEM ALARMS

25.0 MAINTENANCE CHECK

26.0 FAULT FINDING CHART

Troubleshooting Common Issues

Pump Performance Issues

Troubleshooting for pump run, start, and continuous operation problems.

Pressure and Level Faults

Troubleshooting for high/low pressure and low water level faults.

System Communication Faults

Building Automation System (Single System) – Modbus RTU

Building Automation System (Single System) - BACnet MS/TP

Building Automation System (Twin System) – Modbus RTU

Building Automation System (Twin System) – BACnet MS/TP