Watts LF210-5 - Manual

Series LF210-5
Automatic Gas Shutoff Valves
Series LF210-5 automatic gas shutoff valves are positive-acting energy
shutoff for the emergency temperature protection of gas water heaters.
They are self-contained devices independent of all other operating con-
trols. They provide protection against overheating water in the domestic
hot water supply heating systems by automatically shutting off the gas
supply to the heater in the event that the water temperature reaches
210°F (99°C). Series LF210-5 must be manually reset in order to resume
heater service. This feature serves as a warning of malfunctioning of
the normal operating controls. Manual resetting is easily done and does
not require dismantling or replacing of any part of the valve. See “Reset
Button” feature. The LF210-5 features Lead Free* construction to comply
with Lead Free* installation requirements.
This gas shutoff differs from other contemporary design in that Watts
engineers have embodied the time tested Watts auto-thermatic thermal
actuator principle along with a snap-acting trip latch which closes the
valve at a definite controlled temperature.
Models LFL210-5 M2, LFLL210-5 M2 and LFLLL210-5 M2 feature
extended shanks for use with the new generation of water heaters con-
taining extra thick insulation.
Features
• Seating - Buna N disc to metal seating assures positive seal for
shutting off the gas to burner in the event of high water tempera-
ture conditions.
• Reset Button - After operating from high temperature, the gas
shutoff must be manually reset (opened). Pressing the reset button
in as far as it will go and then releasing, opens the valve and allows
gas to again flow to the burner.
• Trip Latch Assembly - Snap acting latch releases the valve to
closed at a definite controlled temperature. Stainless steel spring
seats valve when trip latch releases valve to closed position
• Thermostat - Operates trip latch in response to water temperature.
Thermobulb, temperature sensitive portion, is at end of extension
tube for accurate response to tank temperature.
Models
LF210-5 M2 Suitable for water heaters with up to 3 ⁄
4
" of insulation
LFL210-5 M2 Suitable for water heaters with up to 2" of insulation
LFLL210-5 M2 Suitable for water heaters with up to 2
1 ⁄
2
" of insulation
LFLLL210-5 M2 Suitable for water heaters with up to 3" of insulation
Specifications
Standard setting: 210°F (99°C)
Extension: Furnished with 5" thermostat extension only.
LF210-5 M2 LFL210-5 M2
LFLL210-5 M2 LFLLL210-5 M2
Thermostat
Reset Button
For Gas Water Heater Applications
ES-LF210-5
LEAD FREE
*
Job Name ––––––––––––––––––––––––––––––––––––––––––– Contractor ––––––––––––––––––––––––––––––––––––––––––––
Job Location ––––––––––––––––––––––––––––––––––––––––– Approval –––––––––––––––––––––––––––––––––––––––––––––
Engineer ––––––––––––––––––––––––––––––––––––––––––––– Contractor’s P.O. No. ––––––––––––––––––––––––––––––––––
Approval ––––––––––––––––––––––––––––––––––––––––––––– Representative ––––––––––––––––––––––––––––––––––––––––
Watts product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements,
please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials with-
out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
*The wetted surface of this product contacted by consumable
water contains less than 0.25% of lead by weight.
NOTICE
Inquire with Governing Authorities for Local Installation Requirements