General recommendations, Direct side tapping, For heaters with direct top tapping – Watts LF40XL User Manual
Page 2: Pressure – temperature, Standards
General Recommendations
†
For gas, electric or oil-fired storage water heaters between 180,000 to
205,000 BTU/Hr. rating:
Use
3
⁄
4
" (20mm) Series LF40, LF140 tested
under ANSI Z21.22 with ratings as certified and listed by CSA.
For gas or oil-fired storage water heaters between 205,000 and 730,000
BTU/Hr. rating and for compliance with applicable water heater label-
ing requirements:
Use 1" (25mm) LF40, LF140, LFN240 Series tested
under ANSI Z21.22 with ratings as certified and listed by CSA.
For installations of gas or oil-fired hot water supply boilers over 730,000
BTU/Hr. output heating domestic water and for steam coil storage water
heaters:
Use Series LF340, LF342 tested under ANSI Z21.22 with rat-
ing as certified and listed by CSA.
Direct Side Tapping
FOR EXTERNAL FLUE HEATERS
Use extra length extension thermostat to extend into water storage tank.
FOR INTERNAL FLUE HEATERS
Use short or standard length thermostat. Vertical discharge line must be
installed with its direction downward.
For Heaters with Direct Top Tapping
Use standard or extra length extension thermostat.
Temperature and Pressure Relief Valves should be inspected AT LEAST ONCE EVERY TWO TO FOUR YEARS, and replaced, if necessary, by a
licensed plumbing contractor or qualified service technician, to ensure that the product has not been affected by corrosive water conditions and to ensure
that the valve and discharge line have not been altered or tampered with illegally. Certain naturally occurring conditions may corrode the valve or its
components over time, rendering the valve inoperative. Such conditions can only be detected if the valve and its components are physically removed and
inspected. Do not attempt to conduct an inspection on your own. Contact your plumbing contractor for a reinspection to ensure continuing safety.
Max. 6"
(152mm)
Pressure – Temperature
Temperature relief 210°F (99°C)
Pressure range 75 – 150psi (5.2 – 10.3 bar)
Standard setting 75, 100, 125 and 150psi
(5.2, 6.9, 8.6 and 10.3 bar)
Standards
ASME Rated, ANSI Z21.22, Design certified and listed by CSA, National
Board of B&PVI to Section IV of the ASME B&PV code and meet current
FHA requirements and ANSI Z21.22 in addition to Military Spec. MIL-V-
136-12D, Type I.
Thermostat
Inlet X
Length (in.)
Dimensions (in.)
CSA
Outlet
(Below Inlet
Height
Weight
Temp. Steam
**ASME PRESSURE STEAM RATINg BTU/HR
Model
(in.)
thread)
(Less Thermostat)
Width
lbs.
Rating BTU/HR @75psi set pres. @100psi set pres. @125psi set pres. @150psi set pres.
LF40L-3
3
⁄
4
M x
3
⁄
4
F
3
5
5
⁄
8
2
5
⁄
8
1
3
⁄
4
180,000 777,600 997,600 1,217,600 1,437,600
LF40XL-5
3
⁄
4
M x
3
⁄
4
F
5
5
5
⁄
8
2
5
⁄
8
1
3
⁄
4
205,000 777,600 997,600 1,217,600 1,437,600
LF40XL-8
3
⁄
4
M x
3
⁄
4
F
8
5
5
⁄
8
2
5
⁄
8
1
3
⁄
4
205,000 777,600 997,600 1,217,600 1,437,600
LF140S-3
3
⁄
4
F x
3
⁄
4
F
3
5
5
⁄
8
2
5
⁄
8
1
3
⁄
4
180,000 777,600 997,600 1,217,600 1,437,600
LF140X-5
3
⁄
4
F x
3
⁄
4
F
5
5
5
⁄
8
2
5
⁄
8
1
3
⁄
4
205,000 777,600 997,600 1,217,600 1,437,600
LF140X-8
3
⁄
4
F x
3
⁄
4
F 8
5
5
⁄
8
2
5
⁄
8
1
3
⁄
4
205,000 777,600 997,600 1,217,600 1,437,600
LF40L-2
1M x 1F
2
6
1
⁄
4
2
3
⁄
4
2
1
⁄
4
450,000 1,155,000 1,481,000 1,808,000 2,134,000
LF40XL-4
1M x 1F
4
6
1
⁄
4
2
3
⁄
4
2
1
⁄
4
500,000 1,155,000 1,481,000 1,808,000 2,134,000
LF40XL-7
1M x 1F
7
6
1
⁄
4
2
3
⁄
4
2
1
⁄
4
500,000 1,155,000 1,481,000 1,808,000 2,134,000
*LF140S-3
1F x 1F
3
5
1
⁄
2
3 2
1
⁄
4
570,000 1,670,000 2,140,000 2,610,000 3,085,000
*LF140X-6
1F x 1F
6
5
1
⁄
2
3 2
1
⁄
4
670,000 1,670,000 2,140,000 2,610,000 3,085,000
*LF140X-9
1F x 1F
9
5
1
⁄
2
3 2
1
⁄
4
670,000 1,670,000 2,140,000 2,610,000 3,085,000
*LFN240X-6
1F x 1F
6
6
5
⁄
8
3
3
⁄
8
2
3
⁄
4
730,000 2,195,000 2,817,000 3,438,000 4,059,000
*LFN240X-9
1F x 1F
9
6
5
⁄
8
3
3
⁄
8
2
3
⁄
4
730,000 2,195,000 2,817,000 3,438,000 4,059,000
*LFN241X-5 1
1
⁄
4
M x 1F
5
6
5
⁄
8
3
3
⁄
8
2
3
⁄
4
730,000 2,195,000 2,817,000 3,438,000 4,059,000
*LFN241X-8 1
1
⁄
4
M x 1F
8
6
5
⁄
8
3
3
⁄
8
2
3
⁄
4
730,000 2,195,000 2,817,000 3,438,000 4,059,000
*LF340-3 1
1
⁄
2
F x 1
1
⁄
2
F
3
9
3
⁄
4
4
1
⁄
2
7
1,150,000 3,450,000 4,426,000 5,403,000 6,379,000
*LF340X-8 1
1
⁄
2
F x 1
1
⁄
2
F
8
9
3
⁄
4
4
1
⁄
2
8
1,150,000 3,450,000 4,426,000 5,403,000 6,379,000
*LF342-3
2 M x 1
1
⁄
2
F
3
9
3
⁄
4
4
1
⁄
2
7
1,150,000 3,450,000 4,426,000 5,403,000 6,379,000
*LF342X-8
2 M x 1
1
⁄
2
F
8
9
3
⁄
4
4
1
⁄
2
8
1,150,000 3,450,000 4,426,000 5,403,000 6,379,000
*Furnished with stainless steel thermostat tube.
M = Male
F = Female
**ASME capacities are steam pressure ratings and do not reflect the CSA temperature relieving capacity of the valves for selection purposes.
†LFLL40XL and LFLLL40XL valves with extended inlet shanks should be used for water heaters that have extra thick insulation, Ask for ES-LFLL/LLL40XL.
ES-LF40_LF140_LFN240_LF340 1232
© 2012 Watts
USA: Tel: (978) 688-1811 • Fax: (978) 794-1848 • www.watts.com
Canada: Tel: (905) 332-4090 • Fax: (905) 332-7068 • www.watts.ca
A Watts Water Technologies Company