Watts FR 500 - Manual

Series FR 500
Thermostatic Freeze Relief Kits
Sizes: 1 ⁄
8
", 1 ⁄
4
", 1 ⁄
2
"and 3 ⁄
4
"
(3, 8, 15 and 20mm)
Series FR 500 Thermostatic Freeze Relief Kits are designed to
keep water from freezing in the backflow preventer, while
avoiding discharges based on the air temperature dropping
below freezing. Series FR 500 thermostatically measures the
water temperature and opens at 35°F (1.6°C) and closes at
40°F (4.4°C).
Features
• Compact
• Easy to Install
• Low Maintenance
• Controlled by Water Temperature vs. Air Temperature
• IAPMO Approved
Specifications
A thermostatic freeze relief kit shall be installed on the back-
flow preventer to prevent freezing. The relief kit shall thermo-
statically measure the water temperature and open at 35°F
(1.6°C) and close at 40°F (4.4°C). Relief kit shall be a Watts
Regulator Company Series FR 500.
Materials
Body: Bronze
Springs: Stainless Steel
Internals: DZR Brass
Pressure – Temperature
Working Temperature: 35°F (1.6°C)
Maximum Pressure: 175psi (12.06 bar)
Approvals
For Commercial Applications
ES-FR500
Job Name ––––––––––––––––––––––––––––––––––––––––––– Contractor ––––––––––––––––––––––––––––––––––––––––––––
Job Location ––––––––––––––––––––––––––––––––––––––––– Approval –––––––––––––––––––––––––––––––––––––––––––––
Engineer ––––––––––––––––––––––––––––––––––––––––––––– Contractor’s P.O. No. –––––––––––––––––––––––––––––––––––
Approval ––––––––––––––––––––––––––––––––––––––––––––– Representative ––––––––––––––––––––––––––––––––––––––––
FR 500
Dimensions
2 5 ⁄
16
"
(59mm)
Test Cock
(optional) 1 3 ⁄ 16 "
(30mm)
W/plug
3 1 ⁄ 4 "
(82mm)
2 1 ⁄ 4 "
(58mm)
5 ⁄ 8 " (16mm)
2" (51mm)
UELC
ES-FR500 0619 ©Watts Regulator Company, 2005
Sizes: 1 ⁄ 2 " and 3 ⁄ 4 " (15 and 20mm) Sizes: 1 ⁄ 8 " and 1 ⁄ 4 " (3 and 5mm)
Note: Care should be given to ensure that discharged water will
be adequately piped away from areas where slipping on ice
could be a danger, like roadways and pathways.
IAPMO
0
3.8
7.6
11.4
15.1
18.9
22.7
26.5
30.3
34.1
0
1
2
3
4
5
6
7
8
9
0 1.38 2.76 4.14 5.52 6.89 8.27 9.65 11.03 12.41
0 20 40 60 80 100 120 140 160 180
bar
psi
Line Pressure
Flow
lpm gpm
Discharge Rate (Full Open)
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 without
prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently sold.
USA: 815 Chestnut St., No. Andover, MA 01845-6098; www.watts.com
Canada: 5435 North Service Rd., Burlington, ONT. L7L 5H7; www.wattscanada.ca W a t e r S a f e t y & F l o w C o n t r o l P r o d u c t s