Watts LFN360I - Manual

Tested and rated under “ANSI Z21.22
Relief Valves for Hot Water Supply Systems”.
Design certified by
LFN360
Model LFN360 and
LFN360I
Vacuum Relief Valves
Sizes: 1 ⁄
2
" and 3 ⁄
4
" (15 and 20mm) Male NPT
& 3 ⁄
4
" MNPT x 3 ⁄
4
" FNPT
For automatic venting of a closed system to atmosphere when a
vacuum is created. The Watts LFN360 Vacuum Relief Valve permits
air to enter and prevent vacuum conditions that could siphon the
water from the system, resulting in collapse of a tank or water heater
or equipment burn out.
Features
• Low profile
• All Lead Free* brass body
• Can be mounted in a vertical or horizontal position
• Suitable for low pressure steam and water service
• Tested and rated to ANSI Z21.22
• CSA certified
Applications
• Domestic water heaters and supply tanks
• Table top heaters
• Jacketed steam kettles
• Unit heaters
• Low pressure steam systems
• Steam coil heaters
Note: Vacuum relief valves are not designed or approved as back-
siphonage backflow preventers. For protection against back-siphon-
age install Watts Series 288A vacuum breakers.
Specifications
Watts Models LFN360 and LFN360I Vacuum Relief Valves shall be
installed on domestic hot water supply tanks/ heaters/ unit heaters/
steam kettles as indicated on plans. The vacuum relief valve shall be
ANSI Z21.22 rated and CSA certified. The vacuum relief valve shall
have an all Lead Free* brass body with an integral protective cover.
The valve shall be mounted in a vertical or horizontal position. This
device shall be constructed using Lead Free* brass material. Lead
Free* vacuum relief valves shall comply with states codes and stan-
dards where applicable, requiring reduced lead content. The valve
shall be a Watts Model LFN360 and LFN360I.
LFN360I
For Water Heater/Tank Applications
ES-LFN360/LFN360
Job Name ––––––––––––––––––––––––––––––––––––––––––– Contractor ––––––––––––––––––––––––––––––––––––––––––––
Job Location ––––––––––––––––––––––––––––––––––––––––– Approval –––––––––––––––––––––––––––––––––––––––––––––
Engineer ––––––––––––––––––––––––––––––––––––––––––––– Contractor’s P.O. No. ––––––––––––––––––––––––––––––––––
Approval ––––––––––––––––––––––––––––––––––––––––––––– Representative ––––––––––––––––––––––––––––––––––––––––
LEAD FREE
*
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.
Pressure — Temperature
Maximum steam working pressure: 15 psi (1.03 bar)
Maximum temperature: 250°F (121°C)
Standards
Tested and rated to ANSI Z21.22
CSA certified
SIZe (DN)
in. mm Model Venting CFM Capacity LPM
1 ⁄
2
15 N360/N360I 15 425
3 ⁄
4
20 N360/N360I 15 425
Capacity