Lochinvar Water Pump BLT2026 User Manual

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.  
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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  
3 of 8  
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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  
4 of 8  
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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  
5 of 8  
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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  
6 of 8  
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Notes  
INS7238 Rev C  
7 of 8  
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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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