KRUEGER LMHS Installation, Operation & Maintenance Manual

Single-duct & retrofit terminal units

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WWW.KRUEGER-HVAC.COM
SINGLE-DUCT
& RETROFIT
TERMINAL UNITS
Installation, Operation & Maintenance Manual
for Krueger Terminal Units:
LMHS, LMHS-LC, RVE, SVE

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Summary of Contents for KRUEGER LMHS

  • Page 1 WWW.KRUEGER-HVAC.COM SINGLE-DUCT & RETROFIT TERMINAL UNITS Installation, Operation & Maintenance Manual for Krueger Terminal Units: LMHS, LMHS-LC, RVE, SVE...
  • Page 2: Table Of Contents

    Single-Duct and Retrofit Terminal Units IOM TABLE OF CONTENTS PRE INSTALLATION ...................3 General .......................3 Shipping ......................3 Storage And Handling ..................3 Unit Weights .....................3 Installation Inspection ..................3 Unit Identification ....................3 Installation Precaution ..................3 Service Access ....................3 Codes .........................3 Warranty ......................3 Maintenance ......................4 Control Arrangements ..................4 INSTALLATION ...................5 Step 1 Install Unit ....................5...
  • Page 3: Pre Installation

    GENERAL The LMHS, LMHS-LC, RVE, and SVE single duct terminals are CFG: 3*3*2*OR*08*0*D001*00*0*0S0000*000*E41*4.0*KH000 available with factory installed Pneumatic, Analog electronic, and DDC control options. Figure 1 shows a basic LMHS unit. Figure 2: Example Identification Label SHIPPING UNIT IDENTIFICATION Inspect for damage upon receipt. Shipping damage claims Each unit is supplied with a shipping label and an should be filed with shipper at time of delivery.
  • Page 4: Maintenance

    All control arrangements CONTROL ARRANGEMENTS include a standard K4 LineaCross inlet flow sensor. The LMHS / LMHS-LC single duct and RVE / SVE retrofit units are offered with a wide variety of factory-mounted 1100 (Actuator only): DA-NC Pressure dependent control...
  • Page 5: Installation

    Thermal Hi-Limit accepted medium-pressure duct installation procedures. Auto-Reset(Typ) to actual unit wiring Refer to Table 6.A – LMHS, 6.B – LMHS-LC, 6.C – RVE, and diagram located on inside cover of control 6.D - SVE for pressure and flow data.
  • Page 6: Controls Setup

    K-Factor table for all Krueger VAV terminal inlets. airflow. The relationship between the inlet airflow pressures c. CFM=K√ΔP and cfm is shown in the Figure 6 – Krueger Inlet Airflow CFM=ft /minute Sensor Chart. This chart is attached to each unit.
  • Page 7 Single-Duct and Retrofit Terminal Units IOM ANALOG CONTROLS A01 & A02 THERMOSTAT SETTING INLET SNSOR ΔP INCHES W.G. (PASKALS) Figure 6 - Krueger Inlet Airflow Sensor Chart...
  • Page 8: Pneumatic Controls

    Single-Duct and Retrofit Terminal Units IOM PNEUMATIC CONTROLS Volume controllers for LMHS units are shown below. Identification for each controller is shown in the following table. PNEUMATIC VOLUME CONTROLLERS KMC - CSC 2003 KMC - CSC 2004 (Normally Closed) KMC - CSC 3011 (Multi Function Controller)
  • Page 9 Apply 15 + psi to the thermostat port on the volume duct. controller (marked “T”) by tapping into the main air 7. Read the differential pressure and enter the Krueger Inlet pressure line. Airflow Sensor Chart (Figure 6) to determine the airflow e.
  • Page 10 Single-Duct and Retrofit Terminal Units IOM Adjusting Minimums and Maximums 2-1/2 knob rotations counter clockwise from the fully clockwise position.) • When adjusting the minimum and maximum airflow • After the LO STAT ΔP and HI STAT ΔP initial adjustments settings, the output responds slowly to changes in the are made, cycle the thermostat pressure a few times to set point.
  • Page 11: Analog Controls

    Single-Duct and Retrofit Terminal Units IOM PREVENTATIVE MAINTENANCE 1. Inspect pneumatic tubing for loose connections or leaks. 2. Clean out pneumatic line filters regularly according to manufacturer’s recommendations. TABLE 3: PNEUMATIC CONTROL TROUBLESHOOTING PROBLEM PROBABLE CAUSE Balancer is using the thermostat for control signal. An artificial signal must be provided in place of Controller does not reset to maximum or minimum set point during balance procedure the thermostat.
  • Page 12 The wiring schematic can also be found on the control • SETBACK (standby/unoccupied setback) = 2° F sequence submittal found on the Krueger website. • PROP BD (loop proportional band) = 2° F 5. Replace the thermostat cover. Turn the two hex screws •...
  • Page 13 Single-Duct and Retrofit Terminal Units IOM TABLE 4: SETTING MIN AND MAX VALUES ON THERMOSTAT CFM PER INLET SIZE AO1 & SENSOR SIGNAL SETTING W.G. 0.00 0.03 1107 0.05 1565 0.08 1004 1917 0.10 1159 2214 0.13 1296 2475 0.15 1087 1420 2711...
  • Page 14 Single-Duct and Retrofit Terminal Units IOM ANALOG CONTROL TROUBLESHOOTING Wiring Issues The following troubleshooting guide is directed towards 1. Check for correct wiring at unit and thermostat per single duct cooling applications, the same concepts can be individual controls submittal. applied to other configurations.
  • Page 15: Water Valve Installation

    The controls contractor should provide water valve specs used on controls supplied by others. To connect the field-supplied water valves to the controller, refer to the wiring labels for the control package. APPENDIX A TABLE 5.A: LMHS UNIT WEIGHTS LMHS UNIT WEIGHTS (lbs.) HOT WATER COIL (DRY, lbs.)
  • Page 16 Single-Duct and Retrofit Terminal Units IOM TABLE 6.A: LMHS BASIC PRESSURE AND AIRFLOW DATA MIN AIRFLOW (CFM) MIN INLET STATIC PRESSURE (UNIT & HEAT PRESSURE DROP) ELECTRIC HEAT* MAX Kw PER CFM INLET SIZE COOLING VELOCITY BASIC BASIC WITH BASIC WITH...
  • Page 17 Single-Duct and Retrofit Terminal Units IOM TABLE 6.B: LMHS-LC BASIC PRESSURE AND AIRFLOW DATA MIN AIRFLOW (CFM) MIN INLET STATIC PRESSURE (UNIT & HEAT PRESSURE DROP) INLET SIZE MAX AIRFLOW BASIC WITH BASIC WITH BASIC WITH BASIC WITH BASIC UNIT...
  • Page 18 Single-Duct and Retrofit Terminal Units IOM TABLE 6.C: RVE BASIC PRESSURE AND AIRFLOW DATA INLET SIZE MAX AIRFLOW MIN AIRFLOW FLOW RATE MIN ΔPs (AREA SQFT) (CFM) (CFM) (CFM) (IN WG) 0.007 0.048 (0.09) 0.126 0.239 0.008 0.052 (0.14) 0.137 0.261 0.007 0.05...
  • Page 19 Single-Duct and Retrofit Terminal Units IOM TABLE 6.D: SVE BASIC PRESSURE AND AIRFLOW DATA TABLE 6.D: SVE BASIC PRESSURE AND AIRFLOW DATA MAX AIRFLOW MIN AIRFLOW FLOW RATE MIN ΔPs MAX AIRFLOW MIN AIRFLOW FLOW RATE MIN ΔPs INLET SIZE INLET SIZE (CFM) (CFM)
  • Page 20 Single-Duct and Retrofit Terminal Units IOM TABLE 7: LMHS ELECTRIC HEATER POWER WIRING 120V HEATER 208V HEATER 240V HEATER 277V HEATER 208V 3Ф HEATER 480V 3Ф HEATER HEATER SIZE BTUH (kW) AWG* AWG* AWG* AWG* AWG* AWG* 1,701 3,413 6,826 16.7...
  • Page 21: Replacement Parts

    Single-Duct and Retrofit Terminal Units IOM REPLACEMENT PARTS PRIMARY DAMPER ASSEMBLY PART NUMBER 4, 5, 6" Round (Includes Damper Blade And Shaft) 30182001 7" Round (Includes Damper Blade And Shaft) 30182002 8" Round (Includes Damper Blade And Shaft) 30182003 9" Round (Includes Damper Blade And Shaft) 30182004 10"...
  • Page 22 35134901 Solid State Relay - 1 Pole, 50A (DC Volt) [Crydom CWD 4850] 15012101 Heat Sink 15012001 Discharge Temperature Sensor HH79NZ074 LMHS WATER COILS - 1 ROW PART NUMBER Unit Size 4-6 00-20018-02 Unit Size 7-8 00-20019-02 Unit Size 9-10...
  • Page 23 Single-Duct and Retrofit Terminal Units IOM LMHS WATER COILS - 2 ROW PART NUMBER Unit Size 4-6 00-20020-02 Unit Size 7-8 00-20021-02 Unit Size 9-10 00-20023-02 Unit Size 12 00-20024-02 Unit Size 14 00-20025-02 Unit Size 16 00-20030-02 Unit Size 20...
  • Page 24 YOUR RESOURCE FOR AIR DISTRIBUTION AND EQUIPMENT SOLUTIONS Let us know how we can assist you in your next building application. For more information, contact your local Krueger representative or visit us on the web at www.krueger-hvac.com. CRITICAL ROOM SOLUTIONS...

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Lmhs-lcRveSve

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