Raypak 8450 runs when no demand

[Skinnedcat]

I have little to no pool maintenance experience compared to experts, but I am a highly experienced construction & maintenance worker.
Recently installed a Raypak 8450 heat pump to my pool. Works great, I ridiculously oversized it. One minor issue is at night, it seems to try to turn on even though the water pu.p is off. Leads to a high pressure lockout by morning. That is easily reset, but I would like to fix this so I dont have to start turning it off every night. I put in a call to Raypak, waiting to hear back.....

 

[YippeeSkippy]

Hi there Skinnedcat (great screen name ) Welcome to TFP!

I am clueless with heaters but lets ask a few folks who are up on them- @bobodaclown @mas985

Hope they can help....or anyone else with an idea? <fingers crossed>

Maddie

 

[Skinnedcat]

A Raypak tech called this morning. He was very helpful, did not 'talk down' to me.
The problem/sllution is very simple. I have an above ground pool. The residual water falling through the system from gravity is activating the flow sensor enough to turn on the heater when temperature demands. He said he did not think a check valve would work. He suggest a water sensor which hooks inline, and is wired into the control board somewhere near lugs 7&8.

Problem solved. So happy with this Raypak, I can't even tell ya....

 

[Skinnedcat]

Excuse me. I said water sensor. It is an inline water switch I need. $30-50, readily available online.

 

[YippeeSkippy]

Hey! Great to hear!! Do me a favor though, ok - Would you fill out a signature line (found under settings) with a description of your pool and equipment. This helps us avoid having to ask you details liie "is it inground or above ground".... capisce?
Thanks!

Maddie