Hydronic Heating support hub

Control of the space temperature at a comfortable level is easily accomplished by adjusting the dial clockwise or counterclockwise.
 

The dial has a numbered scale of 1 to 5 corresponding to temperatures of approximately 57°F to 79°F (14°C to 26°C).

The operator or sensing element must not be:

• in a drafty location
• covered
• installed above a heat source

The correct orientation direction is dependent upon the selected operator type. See the mounting guide visual below for reference.

There are a couple of reasons for overheating depending upon which system you have:

For One or Two-pipe systems:

• Ensure operator is not in a cold or drafty spot
• Check on dial adjustment knob as setting could be set too high
• Add a vacuum breaker which allows steam supply to cycle properly

For Hot Water systems:

• Check operator installation as it may not be seated properly

For 'under heating' issues: 

• Ensure radiator is not blocked by furniture, heavy curtains, etc.
• Ensure operator is not in a 'hot' spot or wrong sensor location for that product selection.