LMV Series Technical Instructions
Document No. LV5-10
00
SCC Inc. Page 15 Section 1
Sensors (continued)
Temperature Sensors – Qty (1) Required for
Hot Water Boilers, Optional for Other Applications
One temperature sensor is needed
to measure water temperature on hot water boilers.
Additionally, one may be needed for low fire hold on a steam boiler, hot standby on a steam
boiler, or ambient and stack temperatures for efficiency calculations or FGR hold features. The
most commonly used temperature sensors are listed below. For a list of all temperature sensor
options as well as technical instructions for all available temperature sensors, refer to
Document No. SEN-1000.
QAE2020.001
100 Ohm, 3-wire, platinum RTD used t
o measure
water temperature on hot water boilers
Range: -4 to 374 °F
QAE2012.001
1000 Ohm, 2-wire, platin
um RTD used to measure
water temperature for low fire hold or hot standby
on steam boilers. Also recommended to measure
ambient air temperature for LMV52.4 applications
Range: -4 to 374 °F
QAE2012.9002
1000 Ohm, 2-wire, pla
tinum RTD used to measure
water temperature on hot oil heaters and steam
boilers operating over 150 PSI
Range: -50 to 900 °F
QAC22
1000 Ohm, 2-wire, nickel RTD used to
measure
ambient air temperature (required for efficiency
calculations)
Range: -58 to 158 °F
QAM-P210
1000 Ohm, 2-wire, platinum RTD use
d to measure
flue gas temperature (required for efficiency
calculations and FGR low temperature hold features)
Range: -50 to 900 °F
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