Watts LF40XL - Manual

Series LFN240X
Series LF140 Series LF40L
and LF40XL
For Commercial Water Heater Applications
ES-LF40_LF140_LFN240_LF340
Job Name ––––––––––––––––––––––––––––––––––––––––––– Contractor ––––––––––––––––––––––––––––––––––––––––––––
Job Location ––––––––––––––––––––––––––––––––––––––––– Approval –––––––––––––––––––––––––––––––––––––––––––––
Engineer ––––––––––––––––––––––––––––––––––––––––––––– Contractor’s P.O. No. ––––––––––––––––––––––––––––––––––
Approval ––––––––––––––––––––––––––––––––––––––––––––– Representative ––––––––––––––––––––––––––––––––––––––––
IMPORTANT: INQUIRE WITH GOVERNING AUTHORITIES
FOR LOCAL INSTALLATION REQUIREMENTS
The combined 2-in-1 Temperature & Pressure Relief Valve provides the
least expensive and proven means for protection against both excessive
temperature and pressure emergency conditions.
Fully automatic temperature and pressure relief protection for domestic
hot water supply tanks and heaters based on the latest ANSI Z21.22
Listing requirements for temperature discharge capacity. The LF40,
LF140, LFN240, and LF340 feature Lead Free* construction to comply
with Lead Free* installation requirements.
LF40XL with test lever and extension thermostat for installation in hot
water outlet within the allowable distance from the top of the tank based
on latest ANSI Z21.22. Sizes 3 ⁄
4
" and 1" (20 – 25mm).
LF40L with test lever and short thermostat for installation directly in
available tank tappings. Sizes 3 ⁄
4
" and 1" (20 – 25mm).
Series LF140, LFN240 and LF340 have the same basic body construction
and advanced design features as the Series LF40 except for discharge
capacity and size of inlet and outlet connections. For complete specifica-
tions (including specifications for the Series LF40) see other side. Sizes
1", 1 1 ⁄
4
", 1 1 ⁄
2
" and 2" (25, 32, 40 and 50mm).
Features
• Lead Free cast body
• Non-mechanical seat-to-disc alignment
• Tamper-resistant bonnet screws
• Series
3 ⁄
4
" LF40 and LF140 feature a unique thermostat with a special
thermo-bonded coating
• Series 1" LF140 are furnished with stainless steel thermostat tube
• Series LFN240 and LF340 are hot furnished with stainless steel ther-
mostat tube
Series LF40, LF140,
LFN240, and LF340
Automatic Re-seating
T&P Relief Valves
Following installation, the valve lever MUST be operated AT LEAST
ONCE A YEAR by the water heater owner to ensure that the water-
ways are clear. Certain naturally occurring mineral deposits may
adhere to the valve, blocking waterways, rendering it inoperative. When
the lever is operated, Hot water will discharge if the waterways are
clear. Precautions must be taken to avoid personal injury from contact
with hot water and to avoid property damage.
LEAD FREE
*
* The wetted surface of this product contacted by consumable
water contains less than 0.25% of lead by weight.
Series LF340
Specifications
Temperature & Pressure Relief Valves
Each hot water storage heater shall be equipped with an automatic
temperature and pressure relief valve to protect the heater from exces-
sive pressure and excessive temperature. The device shall be certified
as meeting the requirements of ASME low pressure heating boiler code
and ANSI Z21.22. The BTU discharge capacity of the device shall be in
excess of the BTU input rating of the heater. The device shall be con-
structed using Lead Free* materials. Lead Free* automatic re-seating
T&P relief valves shall comply with state codes and standards, where
applicable, requiring reduced lead content. The T&P valve shall be a
Watts Series LF40, LF140, LFN240 or LF340.
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.