Table of Contents
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Installation
Laars G Series
Tankless Heater Models
LCTEG018, LCTEG025
Voltage options:
600V Three-Phase
480V Three-Phase
415V Three-Phase
400V Three-Phase
380V Three-Phase
Table of Contents
Pre-Installation Information .................................................................2-3
Storage Instructions ................................................................................ 3
Mounting Heater .................................................................................... 4
Plumbing Installation .............................................................................. 5
Electric Installation ................................................................................. 6
Start Up Check List .................................................................................. 7
Start Up .................................................................................................. 8
Digital Controller Operation .................................................................... 9
Operational Tests ............................................................................. 10-11
Product Options .................................................................................... 11
Maintenance ......................................................................................... 12
Troubleshooting ............................................................................... 12-13
Special Installation and Operating Instructions ................................ 14-17
238-54229-00 REV 4/21
Doc# 11100
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Summary of Contents for Laars G Series
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Page 1: Table Of Contents
Installation Laars G Series Tankless Heater Models LCTEG018, LCTEG025 Voltage options: 600V Three-Phase 480V Three-Phase 415V Three-Phase 400V Three-Phase 380V Three-Phase Table of Contents Pre-Installation Information ..............2-3 Storage Instructions ................3 Mounting Heater ..................4 Plumbing Installation ................5 Electric Installation ................. 6 Start Up Check List .................. - Page 2 Compliance and conformity to local codes and ordinances is the responsibility of the installer. Product warranties may be found under "Resources" on our website at www.laars.com. Separate parts from packaging and make sure all parts are accounted for before discarding any packaging material. If...
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Page 3: Pre-Installation Information
Application Specific Requirements The G Series can be used in many different applications that require custom tuning for specific applications to maximize performance of the heater. -
Page 4: Mounting Heater
Installation Packaging Crates are constructed from 3/4" (19mm) OSB. Crate dimensions approx: 44" x 28" x 12" (1118mm x 711mm x 305mm) Crates should not be stacked more than 2 high. All crates must be stacked evenly and horizontally. Safety issues related to packaging: ... -
Page 5: Plumbing Installation
Installation Plumbing Installation Install shutoff valve above (upstream of) the heater inlet. Components Needed: (2) Union 3/4" Install one union on the water inlet side of the heater. Install one 100 Mesh (150 micron) Y-strainer above Shutoff Valve (upstream of) union. -
Page 6: Electric Installation
Installation Electric Installation WARNING Install product to rated line voltage in accordance to current local and national codes and regulations. WARNING All heaters must be fused in accordance with National Electric Code (NEC) for the full load amperage listed on the nameplate rating for each heater. WARNING Failure to properly ground the unit(s) per the National Electric Code could result in injury or death. -
Page 7: Start Up Check List
Installation Start Up Check List Plumbing System is set in a vertical, level, and upright position with the outlet located at the top. System is mounted to the wall using the (4) mounting brackets on the back of the enclosure or bolted to the floor with the optional leg kit. Confirm installation of shutoff valve above (upstream of) the union on the inlet connection Confirm installation of ... -
Page 8: Start Up
Installation Start Up WARNING Make sure the circuit breaker for the heater is OFF. Be sure that plumbing and electrical are complete per Start Up Check List. Slowly turn on water supply to the unit with Energize the electrical service to the unit by the enclosure door open and the circuit switching on the circuit breaker. -
Page 9: Digital Controller Operation
Turns Control Loop On/Manual/Off XX.X% h.PR1 Heater Power% AUt1 Autotune (Contact Laars Representative) C or F C_F1 Change Temperature Units from F to C Output Indicators (1-5) Output 1, 2, 3, 4 or 5 are active and operating if these LEDs are illuminated. -
Page 10: Operational Tests
Installation Perform Operational Test No. 1 Ensure the enclosure door is closed prior to Press the up or down arrow keys to adjust the set performing operation test. temperature. The controller displays the temperature of water measured at the outlet. Located on the panel is one 18kW or 25kW green Set the 3-pole switch or circuit breaker to the ON ready light. -
Page 11: Product Options
Installation Output heating capacity is reduced if these heaters are installed on 415V, 400V, or 380V 3-ph. Contact a Laars representative to supply this information. Satisfactory performance of the heater is dependent upon a specific flow rate vs temperature rise capability . If the desired temperature is not achieved, please verify the following: 1. -
Page 12: Maintenance
Installation Maintenance Preventative maintenance is important for optimal performance of the heater . To ensure the heater works properly, always keep the inside of the enclosure dry . Moisture inside an enclosure increases the humidity, which condenses on cooler surfaces . This can cause electrical problems and reduce the efficiency of enclosure insulation. To prevent problems, perform the following: Verify the interior of the enclosure is dry . -
Page 13: Basic Troubleshooting
All internal breakers must be in the ON position for the unit to work. For additional information on Troubleshooting or other information, contact Laars Technical Support. Please have Model No . and Serial No . available when seeking technical assistance . Serial No . tag is located in the enclosure on the upper left hand corner of the back plate . -
Page 14: Special Installation And Operating Instructions
Installation Special Installation and Operating Instructions Tankless Water Heaters With Optional Class I Division 2 Purge EXP2 Option General Information All Tankless Water Heaters with EXP2 have been fitted with a Z purge system to pressurize the enclosure suitable for use in Class I Division 2 Hazardous Locations. A Continuous Flow (Model CF) Mini-Z Pressurizing System has been fitted to the bottom of the enclosure . - Page 15 Installation Purge Gas Supply Notes An alarm shall be provided to indicate failure of the protective gas supply to maintain the required pressure . Piping for the protective gas shall be protected against mechanical damage . Where the compressor intake line passes through a classified location, it shall be constructed of noncombustible material, designed to prevent leakage of flammable gases, vapors, or dusts into the protective gas, and protected against mechanical damage and corrosion .
- Page 16 Installation IS Installation continued… All quarter turn latches in the door of the PE must be fully latched for proper operation. Power to the PE must be turned off before opening the enclosure . WARNING This Pressurized Enclosure shall not be opened unless the area is known to be free of flammable materials or unless all devices within have been de-energized.
- Page 17 Installation Special Installation Maintenance Routine Maintenance of the System (Every 6 months) Recommended maintenance of the systems is as follows: Repeat Commissioning test at least every six months . The test includes checking the opening pressure of the Relief Valve, setting of the Minimum Pressure Sensor, the “Normal Working Pressure” of the enclosure . Test that the interlock and alarms function correctly .
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