8 DOLPHIN
ALAVO
O & M MANUAL
www.dolphinsolutions.co.uk
C L E A N I N G A N D S E RV I C I N G
Most domestic water supplies contain calcium which will separate out when the water is heated in a
system. The degree and speed of scaling may vary depending on factors such as water flow rates,
system design, the hardness of the water and the temperature to which the water is heated. Deposits
of scale may over time form in the valve, particularly at the hot inlet. The formation of the scale may
adversely affect the performance of the valve which will be detected during the in-service testing.
If this occurs it will be necessary to remove the valve for de-scaling and servicing.
• Isolate the hot and cold supply.
• Remove the valve to a clean working area.
• Remove the protective cap.
• Unscrew the headwork of the valve.
• Carefully remove the element and valve assembly and put to one side.
• Remove the main spring and flow guide and carefully put to one side.
• Inspect the components for contamination or damage.
• Clean or replace as necessary
• Remove the two o rings
• Clean the valve body and headwork using a propriety de-scaler
• Thoroughly rinse the body and headwork in clean water.
• Carefully fit new o rings from the service kit taking care to ensure they are not damaged and are
correctly located.
• Lubricate the o rings with the lubricant provided.
• Re-fit the flow guide and spring lubricating the flow guide around the greatest diameter with the
lubricant provided
• Lubricate the shuttle valve with the lubricant provided
• Re-fit the shuttle valve and element assembly.
• Re-fit the headwork ensuring correct tightening
• Re-fit the valve assembly
• If after cleaning the valve, and replacing the o ring seals, the valve does not function correctly, it may
be necessary to replace the thermal element.
A L AVO T H E R M O S TAT I C M I X I N G VA LV E
