KRUEGER LMHS User Manual

Form #: SIDOM.4 Revised: 03/19
Installation, Operation, and
Maintenance Manual
Single-Duct and Retrofit Terminal Units
Models: LMHS, RVE, SVE

KRUEGER LMHS Specifications

General

Brand	KRUEGER
Model	LMHS
Category	Industrial Equipment
Language	English

Summary

Pre-Installation

Unit Identification

Installation and Precaution

Control Arrangements

Direct Digital Electronic Control Arrangement (Field Supplied)

Analog Electronic Control Arrangement

Pneumatic Control Arrangement

Installation

Step 1 - Install Unit

Instructions for moving, suspending, and leveling the unit during installation.

Step 2 - Make Duct Connections

Guidelines for installing supply and discharge ductwork to the unit's inlet collars.

Step 3 - Install Sensors and Make Field Wiring Connections

Procedures for installing sensors and making field wiring connections for controls.

Typical Power Connections for LMHS units with 3-Stage Electric Heat

Controls Setup

Set Points

Field Adjustment of Minimum and Maximum Airflow Set Points

Guidance on adjusting minimum and maximum airflow set points using airflow sensors.

System Calibration of Airflow Sensor

Pneumatic Controls

Pneumatic Volume Controllers

Pneumatic Control Sequence Controllers (Table 2)

Preparation for Balancing (Control Sequences 1102 and 1103)

Steps for preparing to balance units with specific pneumatic control sequences.

Balancing Procedure (Control Sequences 1102 and 1103)

Detailed procedure for balancing units with direct acting thermostats.

Reverse Acting Thermostat; Normally Closed Damper (Control Sequence 1103)

Procedure for balancing units with reverse acting thermostats and normally closed dampers.

Balancing Procedure (Control Sequences 1104-1110)

Steps for balancing units with control sequences 1104 through 1110.

Adjusting Minimums and Maximums

Detailed instructions for adjusting minimum and maximum airflow settings on pneumatic controllers.

Pneumatic Control Troubleshooting

Analog Controls Installation and Balancing Procedures

Thermostat Installation

Programming Thermostat

Instructions on how to program the thermostat for airflow limits and other settings.

Analog Control Troubleshooting

Controller

Troubleshooting steps for controller-related issues in analog systems.

Wrong Rotation Direction or Stroke Range

No Pressure Output Signal from Inlet Sensor

Wiring Issues

Appendix A

LMHS Basic Pressure and Airflow Data

RVE Basic Pressure and Airflow Data

SVE Basic Pressure and Airflow Performance

Replacement Parts

Primary Damper Assembly

Electric Heat and LineaHeat

Water Coils