Hi everyone,
I'm new here and hoping I can get some help with a Honeywell L641B1004 pipe Stat. I have looked through the forum and found threads similar to what I need but not a definite match.
I live on a boat and have a woodburner for heating in winter. This supplies heat to 3 radiators. I've recently connected a calorifier to the system, which is a glorified hot water cylinder with internal coil. The problem is this. Because the central heating is a small system, it is very basic. When the fire is lit, the pump runs continuously. This works fine until you add a requirement for storing hot water from the backboiler to the hot water cylinder.
As the fire gets cooler overnight, I want to disconnect the HW cylinder from the cooling water in the heating circuit. I've done this by adding a Honeywell zone valve. Currently, the ZV is being manually operated on a separate switch.
I've just bought a Honeywell L641B1004 low limit Pipe Stat. It was my understanding that if I set the stat to 40C, it would not operate the ZV until the pipe rose to 40C. I understood this as 'make on rise'. Am I misunderstanding this?
I've used a multimeter across common and contact 1 and the stat doesn't seem to be following the rules.
Can anyone clarify this for me please?
Many thanks in advance, Cygnus
I'm new here and hoping I can get some help with a Honeywell L641B1004 pipe Stat. I have looked through the forum and found threads similar to what I need but not a definite match.
I live on a boat and have a woodburner for heating in winter. This supplies heat to 3 radiators. I've recently connected a calorifier to the system, which is a glorified hot water cylinder with internal coil. The problem is this. Because the central heating is a small system, it is very basic. When the fire is lit, the pump runs continuously. This works fine until you add a requirement for storing hot water from the backboiler to the hot water cylinder.
As the fire gets cooler overnight, I want to disconnect the HW cylinder from the cooling water in the heating circuit. I've done this by adding a Honeywell zone valve. Currently, the ZV is being manually operated on a separate switch.
I've just bought a Honeywell L641B1004 low limit Pipe Stat. It was my understanding that if I set the stat to 40C, it would not operate the ZV until the pipe rose to 40C. I understood this as 'make on rise'. Am I misunderstanding this?
I've used a multimeter across common and contact 1 and the stat doesn't seem to be following the rules.
Can anyone clarify this for me please?
Many thanks in advance, Cygnus