LWCO and High Limit Reset Types in Laars Mascot Units
Applies
To: Mascot Heat Only, Mascot Combi, and LT/Instantaneous Water Heater Series
Last
Updated: July 30, 2025
Summary
Mascot
Heat Only and Mascot Combi units (all sizes) include:
Auto-reset Low Water Cutoff (LWCO)
Auto-reset High Limit
LT/Instantaneous
Water Heater series include:
Manual-reset High Limit (reset via control panel)
No built-in LWCO
NYC Code
Requirement: Built-in auto-reset functions do not satisfy local manual-reset
mandates. Contractors must install external manual-reset LWCO and high-limit
devices on system piping.
Detailed Overview
|
Unit Series
|
Built-In LWCO
|
Built-In High Limit
|
Reset Type
|
NYC Installation Requirement
|
|
Mascot Heat Only & Mascot Combi
|
Yes
|
Yes
|
Auto-reset
|
External manual-reset LWCO & high limit
|
|
LT / Instantaneous Water Heaters
|
No
|
Yes
|
Manual-reset (control panel)
|
No external reset required
|
Installation Notes for NYC
Per NYC
code, the built-in auto-reset LWCO and high-limit controls in Mascot boilers do
not meet manual-reset requirements. The installing contractor must provide and
install:
A manual-reset LWCO (external)
A manual-reset high-limit device (external)
These
must be mounted on the system piping outside the equipment enclosure.