Boiler house Level controls
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Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2021
AI-P693-37 EMM Issue 1
Tank Level Control (On/Off)
Description Warning: This document does not contain sufficient information to install the system safely. See the Installation and Maintenance Instructions supplied with the products for full details. The Spirax Sarco (on/off) tank level control system is suitable for most qualities of industrial waters down to a nominal 1 μ S/cm or 1 ppm at 25 °C minimum. The controllers must be mounted in an enclosure or panel to provide environmental protection. They are DIN rail mounting. Applications
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On/off tank level control can be achieved using the Spirax Sarco LCS1350 controller in conjunction with LP11-4 level probes. The LCS1350 controller is able to provide the following functions:- a) Pump-in control with low or high alarm or b) Pump-out control with low or high alarm or c) High or low alarm plus extra low alarm. Typical arrangements We recommend the probe is in a protection tube. The metal tank generally forms the earth return. However, where the tank is of a non-conductive material one of the probe electrodes should be used to provide the earth return.
LCS1350 controller
LP11-4 probe
Pump
Pump contactor
Pump off Pump on Low level alarm High level alarm
LCS1350 controller
Fig .1 Pump fill with low level alarm
LP11-4 probe
Solenoid valve
Low level alarm Valve open Valve closed High level alarm
Fig. 2 Valve control fill with low level alarm
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