INS7238 Rev C
LTV VALVE APPLICATION INSTRUCTIONS FOR
LOW TEMPERATURE PROTECTION
COPPER-FIN AND POWER-FIN MODELS
CB 495 - 2066 / CH 401 - 2071 AND PB 501 - 2000
Kit components:
Figure 2_ 2" Valve
VAL30000 - 1 1/2" VALVE
A = BLENDED
WATER
Models: CB 45 - 500
• VAL20000
• INS7238
1 1/2" LTV Valve
Instruction Sheet
VAL3048 - 2" VALVE
Models: CB 495 - 745 and CH 401 - 751
• VAL2123
• INS7238
2" LTV Valve
Instruction Sheet
B = FROM
VAL3047 - 2 1/2" VALVE
BOILER
OUTLET
Models: CB 986 - 2066, CH 991 - 2071, and PB 501 - 2000
C = SYSTEM
RETURN
• VAL2124
• BLT2118
• BLT2119
• BLT2026
• BLT2120
• GKT2055
• TFL2092
• INS7238
2 1/2" LTV Valve
Bolt (12)
Nut (12)
Flat Washer (24)
Star Washer (12)
Gasket (3)
WATER
Figure 3_ 2 1/2" Valve
Flange (3)
Instruction Sheet
B = FROM BOILER
OUTLET
Pump and motor unit are designed to be
supported by the inline piping only. Do not
support in any other manner. When placing
pump between flanges, tighten flange bolts
evenly and do not tighten excessively.
ƽ CAUTION
Figure 1_ 1 1/2" Valve
A = BLENDED
WATER
C = SYSTEM
RETURN
WATER
C = SYSTEM
RETURN
A = BLENDED
WATER
WATER
B = FROM BOILER
OUTLET
NOTE: A-B-C is noted on the valve to depict proper orientation.
Typical piping applications (cont.):
Figure 6_Primary /Secondary Piping of a Single Boiler - 2" Valve
A = BLENDED
WATER
C = SYSTEM
RETURN
B = FROM
BOILER
WATER
OUTLET
DETAIL
Note: Valve must be installed with proper port orientation.
Failure to observe port markings on the valve body prior to
installing the valve could result in damage to the unit.
*Best practice for Indoor/Outdoor reset.
**Best practice for set point operation.
NOTES:
1) Unit(s) high limit must be set at max.
2) Inlet and outlet connections to the boiler are shown for reference only. Actual connections may vary
from those represented here. Consult the Installation and Service Manual for actual locations.
3) Unit(s) pump should operate only during firing periods.
Figure 7_Primary/Secondary Piping of Multiple Boilers - 2" Valve for each boiler
NOTES:
1) Unit(s) high limit must be set at max.
2) Inlet and outlet connections to the boiler are shown for reference only. Actual connections may vary
from those represented here. Consult the Installation and Service Manual for actual locations.
3) Unit(s) pump should operate only during firing periods.
INS7238 Rev C
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Typical piping applications (cont.):
Figure 8_Primary/Secondary Piping of a Single Boiler - 2 1/2" Valve
A = BLENDED
WATER
C = SYSTEM
RETURN
WATER
Note: Valve must be installed
with proper port orientation. Failure to
observe port markings on the valve
body prior to installing the valve could
result in damage to the unit.
B = FROM
BOILER
OUTLET
DETAIL
NOTES:
1) Unit(s) high limit must be set at max.
2) Inlet and outlet connections to the boiler are shown for reference only. Actual connections may vary
from those represented here. Consult the Installation and Service Manual for actual locations.
3) Unit(s) pump should operate only during firing periods.
Figure 9_Primary/Secondary Piping of Multiple Boilers - 2 1/2" Valve for each boiler
NOTES:
1) Unit(s) high limit must be set at max.
2) Inlet and outlet connections to the boiler are shown for reference only. Actual connections may vary
from those represented here. Consult the Installation and Service Manual for actual locations.
3) Unit(s) pump should operate only during firing periods.
INS7238 Rev C
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Figure 10_1 1/2" LTV Valve - 45,000 - 500,000 Btu/hr
PORT "A"
A
C
PORT "B"
5.250
PORT "C"
B
6.125
SIDE
3.750
TOP
Figure 11_2" LTV Valve - Up to 750,000 Btu/hr
Figure 12_2 1/2" LTV Valve - 990,000 Btu/hr and up
INS7238 Rev C
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Figure 13_1 1/2" - Flow vs. Pressure Drop
Figure 14_2" - Flow vs. Pressure Drop
FLOW vs. PRESSURE DROP
FLOW IN U.S. GPM
Figure 15_2 1/2" - Flow vs. Pressure Drop
Maintenance instructions
The LTV valve is maintenance free. It does not require regular
cleaning or calibration. In most installations, the 1-1/2" and 2"
valves are hard piped into place and do not afford access. The
2-1/2" valve has flanged connects which allows removal.
If the valve becomes unable to maintain a consistent inlet water
temperature of 125°F during steady state firing conditions, replace
the valve or the wax element inside the valve.
The
recommended
maximum
high
ƽ WARNING
temperature to the valve should be 175°F; the
absolute maximum is 195°F.
INS7238 Rev C
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Notes
INS7238 Rev C
7 of 8
Revision Notes: Revision A (INS7238 Rev A)
reflects the addition of the 1 1/2" valve.
Revision B (INS7238 Rev B) reflects the
addition of the maintenance instructions.
Revision C (ECO C02335) reflects the revision
of FIG.’s. 1, 2, 3, 4, 6 & 8.
10/08 - Printed in U.S.A.
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