Why is certified hardness monitoring required in the boiler house?

Steam boiler systems place the highest demands on the quality of the feed water. Even the smallest amounts of residual hardness can lead to limescale deposits on the heating surfaces – resulting in overheating, loss of performance and, in the worst case, boiler damage. VdTÜV Code of Practice WÜV 100 therefore requires continuous, automated monitoring of water hardness using certified devices – including the option of 72-hour unattended operation (BOB).

What is the SYCON BoB?

The SYCON BoB from RLS Wacon is a fully automatic online analyzer for monitoring the residual hardness in boiler feed water and returning condensate. It is certified in accordance with VdTÜV data sheet WÜV 100 and therefore fulfills the requirement for operation without supervision (BOB) for 72 hours.

The device is based on the proven SYCON platform, but is specially optimized for use in steam boilers: Pre-configured relays, an access code to protect against incorrect parameterization, a BOB probe for level monitoring of the Reagent and a shortened maintenance interval ensure maximum operational reliability.

How does the SYCON BoB work?

The SYCON BoB works according to the colorimetric titration method. A water sample is automatically fed into the measuring chamber and the Reagent (H25-0.05 or H25-0.1) is added step by step. An optical sensor detects the color change and calculates the residual hardness of the water.

The integrated BOB sensor continuously monitors the fill level of the indicator bottle. As soon as the remaining content is sufficient for less than 72 hours of operation (approx. 12 % fill level), a BOB message is issued via relay 2 and the display. This ensures that the indicator supply is replenished in good time.

The analysis time is approx. 3 minutes with an indicator consumption of only 0.05 ml per analysis. Up to 10,000 analyses are possible with a 500 ml bottle.

Special features compared to the other SYCON models

Advantages of the SYCON BoB

• TÜV-certified according to VdTÜV data sheet WÜV 100

  Meets the legal requirements for the unattended operation of steam boiler systems

• 72-hour BOB operation with fill level monitoring

  The BOB probe signals in good time when the indicator supply needs to be replenished – can be extended to up to 144 hours with a longer measuring interval

• Access code to protect against incorrect parameterization

  Locks access to critical settings during unattended operation

• Preconfigured relays for standardized installation

  Limit value, BOB message, device fault, analysis active – Terminal diagram can be created in advance

• RS485 interface with Modbus RTU

  Integration into the boiler control system and higher-level control systems

• Analog output 0/4-20 mA

  Direct transmission of measured values to the system controller

• Robust housing (IP54, IK08)

  Suitable for the harsh environmental conditions in the boiler house

• Self-calibrating full color sensor

  No manual calibration – automatic compensation for ambient light, contamination and turbidity

• Very low indicator consumption

  0.05 ml per analysis – up to 10,000 analyses per 500 ml bottle

Der Beitrag SYCON BoB erschien zuerst auf RLS Wacon analytics.