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Lochinvar CLN 120080 - User Manual

Lochinvar CLN 120080
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COMMERCIAL GAS WATER HEATERS
Instruction Manual
PRINTED 1114 327510-004
PLACE THESE INSTRUCTIONS ADJACENT TO HEATER AND NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.
MODELS
CLN 120080, 154080, 180080, 199080, 199100,
250100(A), 275100(A), 310085(A),
366085(A), 400085(A)
Ultra Low NOx SERIES 200
INSTALLATION - OPERATION - SERVICE
- MAINTENANCE - LIMITED WARRANTY
Complies with SCAQMD Low NOx Rule 1146.2
WARNING: If the information in these
instructions is not followed exactly, a fire
or explosion may result causing property
damage, personal injury or death.
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
WHAT TO DO IF YOU SMELL GAS:
Do not try to light any appliance.
Do not touch any electrical switch; do
not use any phone in your building.
Immediately call your gas supplier
from a neighbor’s phone. Follow the
gas supplier’s instructions.
If you cannot reach your gas supplier,
call the fire department.
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
•
•
•
•
Read and understand this instruction
manual and the safety messages
herein before installing, operating or
servicing this water heater.
Failure to follow these instructions and
safety messages could result in death
or serious injury.
This manual must remain with the
water heater.
300 Maddox Simpson Parkway
Lebanon, TN 37090
Phone: 615-889-8900 • Fax: 615-547-1000
Technical Service email: 2tech@lochinvar.com
www.Lochinvar.com

Table of Contents

Questions and Answers

  • M
    Mark WalkerAug 8, 2025
    Why is my Lochinvar Water Heater not producing enough hot water?
    • B
      Brandon GarciaAug 8, 2025
      Several factors can cause insufficient hot water. The thermostat might be set too low; try setting the thermostat dial to a higher temperature. The upper or lower temperature probe might be out of calibration, requiring a qualified service agency to check continuity and resistance, and replace the probes if needed. The main manual gas shutoff valve could be partially closed; ensure it's fully open. The heater might be too small for the demand; try spacing out water usage to allow the heater time to restore water temperature. Finally, the heater recovery may be slow, requiring a qualified service agency to check the gas input and look for inlet air or flue gas exhaust blockages.
  • D
    Desiree RamirezAug 12, 2025
    What to do if my Lochinvar CLN 120080 is not hot enough?
    • P
      Patrick MendezAug 12, 2025
      If your water is not hot enough, the thermostat may be set too low. Try setting the thermostat dial to a higher temperature. Alternatively, the upper or lower temperature probe may be out of calibration, in which case you should call a qualified service agency to check the continuity and resistance of the probes, and replace them if they are out of specification.
  • L
    Leah RamseyAug 17, 2025
    What to do if my Lochinvar CLN 120080 Water Heater smells like gas?
    • B
      brandyhansenAug 17, 2025
      If you notice gas odors, it could indicate possible gas leaks. Immediately shut off the gas supply to the heater and call the gas company.
  • P
    Paul LeeAug 21, 2025
    How to fix water leaks in my Lochinvar CLN 120080 Water Heater?
    • M
      Marie EdwardsAug 21, 2025
      If you have water leaks, first check if the drain valve is not closed tightly. If it is loose, try to close it tightly. If the drain valve cannot be closed tightly, replace it. If you cannot identify or correct the source of the leak, shut off the gas supply to the heater and close the cold water inlet valve to the heater, then call a qualified service agency.
  • B
    Brandon BuckAug 25, 2025
    Why is my Lochinvar Water Heater's water temperature too hot?
    • A
      allison66Aug 26, 2025
      If the water temperature is too hot, the thermostat may be set too high. Try setting the thermostat to a lower setting.
  • S
    Steven ScottAug 29, 2025
    Why does my Lochinvar CLN 120080 Water Heater make a rumbling noise?
    • R
      Rachel WilliamsAug 29, 2025
      Rumbling noises are often caused by sediment accumulation on the bottom of the tank. Try draining a quantity of water through the drain valve. If the rumbling persists, call a qualified service agency.
  • M
    mirandamichelleSep 3, 2025
    What causes pounding or water hammer in my Lochinvar CLN 120080 Water Heater?
    • C
      craiggallegosSep 3, 2025
      Pounding or water hammer can occur if air chambers in the piping have become waterlogged, or if the thermal expansion tank is damaged, improperly charged, or improperly sized. To resolve this, drain the piping system and refill it, ensuring the heater is off during this process. Also, check the thermal expansion tank charge pressure when the water system pressure is zero.

Lochinvar CLN 120080 Specifications

General IconGeneral
ModelCLN 120080
CategoryWater Heater
Capacity80 Gallons
TypeCommercial
Input120, 000 BTU/hr
Recovery Rate125 GPH at 100°F rise
Efficiency96%
Recovery Efficiency80%
Water Connections2" NPT
Vent Size6 inches

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