HydroStat 3150 User Manual

MODEL 3150
Combination Low Water
Cut-Off & Universal
Temperature Limit Control
for Oil-Fired Boilers
120 VAC Operating Voltage
PATENT NOS. 7,891,572; 8,931,708
INSTALLATION INSTRUCTIONS
and OPERATING MANUAL
• Replaces Common Aquastat
*
Models – Can be installed on existing immersion
wells to replace both cold-start and triple-action Aquastats
®
. Industry standard wiring
designations make change-outs quick and easy.
• Digital Display – Easy to read LED continually displays boiler temperature. Also displays
temperature limit and differential settings during adjustment.
• Easy to Set – Dials for setting temperature limits and differentials eliminate complicated
programming.
• Thermal Pre-Purge Feature – Conserves fuel and meets 2012 DOE regulations by
circulating latent heat in the boiler to the heating zone before firing the burner.
• *Aquastat is a registered trademark of Honeywell International, Inc.
WARNING
Electrical shock hazard. To prevent electrical shock, death or
equipment damage, disconnect power supply before
installing or servicing control. Only qualified personnel may install or service this control in
accordance with local codes and ordinances. Read instructions completely before proceeding.
CAUTION
To prevent serious
burns, boiler
should be thoroughly cooled before installing or
servicing control.
WARNING
Frozen pipes/water damage. Central heating systems are prone to shut down as a result of power or fuel outages,
safety related fault conditions or equipment failure. Installation of freeze protection monitoring or other precautions
is recommended for unattended dwellings in climates subject to sustain below-freezing temperatures.
Dual Function
Design
Temperature Limit Control
Designed for cold start and tankless
coil boilers.
Low Water Cut-Off
Provides protection against potentially
dangerous low water conditions
when installed with the Hydrolevel
Electro-Well™ (see page 2 for details).
126 Bailey Road, North Haven, CT 06473 • Phone (203) 776-0473 • FAX (203) 764-1711 • www.hydrolevel.com

HydroStat 3150 Specifications

General

Category	Temperature Controller
Control Algorithm	PID
Model	3150
Output Type	Relay
Power Supply	24V
Operating Temperature	0°C to 50°C

Summary

Installation and Operation Manual Overview

Key Product Features

Highlights key features like Aquastat replacement, digital display, ease of setting, and thermal pre-purge.

Dual Functionality

Temperature and Low Water Controls

Details the control's capability as a temperature limit and low water cut-off device.

Immersion Well Installation

Installation with Electro-Well

Describes connecting the HydroStat to a Hydrolevel Electro-Well for full functionality.

Installation with Standard Well

Explains installing the HydroStat on a standard immersion well, limiting functionality.

Control Mounting Procedure

Step-by-Step Mounting Guide

Provides three steps for physically mounting the control to the immersion well.

Wiring the HydroStat Control

Wiring Connections and Diagram

Details the wiring steps for power, circulator, burner, and thermostat, including a schematic.

Control Settings Configuration

Cold Start Operation Setup

Guides setting the control for cold start boiler operation.

Warm Start Operation Setup

Guides setting the control for warm start (domestic hot water) operation.

Boiler Operation Modes

Cold vs. Warm Start Explained

Illustrates and explains the behavior of the control in cold start and warm start modes.

Configuring Optional Features

Thermal Pre-Purge Feature

Explains how to activate and use the thermal pre-purge feature for efficiency.

Temperature Unit Selection

Details how to switch the display between Fahrenheit and Celsius.

Manual Reset Low Water Cut-Off

Describes setting and testing the manual reset function for low water conditions.

Advanced Feature Configuration

Circulator Activation Options

Explains how to set the circulator to respond to different call signals.

Setting the Immersion Well Type

Guides on selecting the correct well type for accurate operation.

Restore Factory Default Settings

Instructions on resetting all features to their original factory defaults.

LED Legend and Status Indicators

Indicator Light Descriptions

Explains the meaning of the TEMP and LWCO status LEDs.

Test/Settings Button Functions

Details how to use the Test/Settings button for testing and viewing settings.

Troubleshooting Guide

Common Issues and Solutions

Provides a table of common problems and their potential fixes.

Low Water Light Troubleshooting

Details specific steps for diagnosing low water light issues.

Troubleshooting Flow Chart: Burner Not Firing

Flow Chart Analysis for Burner Failure

Guides users through a flowchart to diagnose why the burner is not firing.

Troubleshooting Flow Chart: Burner Not Shutting Down

Flow Chart Analysis for Continuous Burner Operation

Guides users through a flowchart to diagnose why the burner is not shutting down.

Electro-Well System Components

HydroStat with Electro-Well Integration

Explains the benefits of using the HydroStat with an Electro-Well for full functionality.

Overview of Electro-Well Models

Presents different Hydrolevel Electro-Well models available.

Product Information and Support

Maintenance and Installation Notes

Covers Electro-Well maintenance and remote mounting kits.

Specifications and Warranty

Lists technical specifications and the manufacturer's limited warranty.