In This Issue...
We’re focusing on a new application based on familiar and proven components. It is a modulating feedwater application that’s gaining popularity. Similar to your favorite baseball or sports team, there’s something about seeing individual talent coming together to create an all-star team. At Siemens, the same can be said about our components. Each one performs like a champion – extremely reliable and accurate. When matched together, they offer your customers a complete solution. Read on to find out what players are working together to create an unbeatable team –
‘The Siemens Differential Pressure Modulating Level Control Solution’.

Are your customers tired of old-fashioned controls that cannot maintain a constant water level in your boiler or deaerator tank? Our system is a solid state, fully modulating level control system that offers accurate, reliable control. It precisely maintains the water level inside the deaerator tank or boiler to prevent flooding or running dry. This helps your customers avoid low or high level lockout conditions and alarms! The features of these components make the Siemens system extremely flexible and ideally suited for retrofit or new installations on most boilers and deaerators.

The key players are:

1. The RWF40 Controller
The RWF40 is the first and only single loop, temp/pressure PID (Proportional Integral Differential) control on the U.S. market that is designed and engineered specifically for burner/boiler applications. The same functions can also be used to control water level. Both intelligent and anticipatory, it uses an auto tune function that allows the PID parameters to be optimized to the boiler for optimum level stability without hunting. Extra relay contacts are configured to high or low level indicators. An additional operating relay can be configured to turn pumps on or off. There’s no need to re-pipe to put the desired operating level at a different height – simply change the controller’s setpoint up or down. Modbus capabilities enable remote monitoring, allowing the controller to interface with a building management system or through an HMI (human-machine interface).

2. Differential Pressure Sensor
This sensor features a solid-state design, so there are no moving parts to bind up or wear out. It is easily commissioned utilizing only three buttons located on the top of the sensor (or via HART communication).

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You Should Know

Meet Pete Pinto, Sr. Principal Application Engineer. Ask Pete what his two favorite features on the Differential Pressure Level Control System are and he’ll tell you: First, it’s rock-solid and highly accurate! Second, it’s easy to commission and the water level can be easily adjusted at the touch of a button. Thanks to the RWF40 Controller, the operator can move the desired water level up or down, which eliminates the need to physically re-pipe to change the desired level to a different height.