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Author Topic: Simple on/off for heat pump  (Read 9206 times)
Richard Owen
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« Reply #15 on: July 13, 2009, 02:26:23 PM »

My reading of that part of the diagram is that the switch that is labelled kt just before the box labelled YV and numbered 9 is the switch to tell it to heat or cool.

That's because YV is labelled as 4-way valve on my diagram.
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44 Yingli 230Wp panels feeding into 2x Solar Edge SE5000 inverters.
20x 58mm SE, 20x 58mm SW, Solar Thermal feeding 320l thermal store.
10kW heat pump.
300W of Hydro Power.
welshboy
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« Reply #16 on: July 13, 2009, 02:35:46 PM »

My reading of that part of the diagram is that the switch that is labelled kt just before the box labelled YV and numbered 9 is the switch to tell it to heat or cool.

That's because YV is labelled as 4-way valve on my diagram.
The narrative for kt is Timer  (in the footer) so 8-9 is the only electrical input from the timer via a switch ?. It seems to do 2 things - one to the valve part of the board(goodness knows what else) and also to the 4 way valve.
I am tempted to disconnect 9 switch on and see what happens
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welshboy
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« Reply #17 on: July 13, 2009, 03:09:12 PM »

My idea won't work. Disconnected 9 and set the timer to come on - yes came on on time heatpump started . Hmmm disappointing.
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Richard Owen
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« Reply #18 on: July 13, 2009, 03:42:52 PM »

At least we know what doesn't work.

Ivan,

Any white smoke from Keram regarding the pump on/off signal?
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44 Yingli 230Wp panels feeding into 2x Solar Edge SE5000 inverters.
20x 58mm SE, 20x 58mm SW, Solar Thermal feeding 320l thermal store.
10kW heat pump.
300W of Hydro Power.
welshboy
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« Reply #19 on: July 15, 2009, 08:48:55 AM »

Contacted Keram and they sent me this( below) - the diagram did not paste . If you want me to send you the pdf file pm me with your email.
It appears there is a link you can connect another timer.
It looks as clear as mud

WRB External Link Control
1. At first, you must set【SA10】at ON, the procedure is :
In “OFF” state , press “RESET” for 5 seconds, when the controller buzz and the LCD display “ ”flashes, then press “OPTIONS” for 5 seconds, when the controller buzz, into parameter【SP03】, and push “OPTIONS” , every push will appear different parameter, when the 【SA10】 appears, Press 【TIME】 to modify, select ON, so you can try the Link operation function..
You can try the Link operation function, if the software support the function, it works, and if the software does not support the function , it does not work, and next time we will ask the controller manufacturer to modify the software to support the function.
2. How to test:
The connection as follows
WRB Heat pumpPCB LINK PCOM External Timer
The Link operation is designed for external ON/OFF controller to control the ON/OFF of the heat pump.
You can have many external control to connect with the heat pump.
The operation of compressor is controlled by terminal condition(external control), when there is more than one external control is in” ON”, the compressor works, if all the external control is in “OFF”, the heat pump(compressor ) stops.
You can use this function for your External Timer test, maybe it works.
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Richard Owen
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« Reply #20 on: July 15, 2009, 08:57:21 AM »

If you want me to send you the pdf file pm me with your email.

Done.

Quote
You can use this function for your External Timer test, maybe it works.

Love this bit!
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44 Yingli 230Wp panels feeding into 2x Solar Edge SE5000 inverters.
20x 58mm SE, 20x 58mm SW, Solar Thermal feeding 320l thermal store.
10kW heat pump.
300W of Hydro Power.
welshboy
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« Reply #21 on: July 15, 2009, 09:11:41 AM »

Richard -pdf sent
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welshboy
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« Reply #22 on: July 15, 2009, 10:12:11 AM »

Richard
Looking at the wiring diagram keram sent(clear eh!) it is a connection from "pcom" via a second timer to "link".
The original wiring diagram has 5 " 30" connections  2 are pcom 1 link.
The actual board has 3 "30" connections  presumably the first is link and the last is pcom ?

Any way to establish this ?
« Last Edit: July 15, 2009, 10:13:54 AM by welshboy » Logged
Richard Owen
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« Reply #23 on: July 15, 2009, 10:19:38 AM »

Hi Tony,

Great diagram!

I'm a bit distracted today having to finish a bathroom prior to MIL arriving tomorrow, so limited time to play with the heat pump.

I'll try and find some time over the next day or two to try and reconcile the diagram, the manual and the heatpump.

Don't let me put you off having a go in my absence though.
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44 Yingli 230Wp panels feeding into 2x Solar Edge SE5000 inverters.
20x 58mm SE, 20x 58mm SW, Solar Thermal feeding 320l thermal store.
10kW heat pump.
300W of Hydro Power.
welshboy
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« Reply #24 on: July 16, 2009, 08:29:49 AM »

I emailed Keram and asked for clarification about which terminals to connect to.
Wiring Diagram has 5 "30" connections   whilst actual board has 3 (double) "30" connections
This is their reply( Anybody understand Chinese) !!!!!!!
Edit "Actually the diagram on page 19 of the manual contains these characters as being the link- must check the wires -I think they are on them"
Hello
    
        You can disconnect the "联动“ from "30" , and connect a external timer between "联动” and the disconnected "30".
 
 
 
 
        Best regards
 
        Yang


YOUR ENERGY SAVING SPECIALIST ON HEATING
« Last Edit: July 16, 2009, 08:50:45 AM by welshboy » Logged
welshboy
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« Reply #25 on: August 24, 2009, 04:44:49 PM »

As Autumn is nearly here I thought I would have a go at the heatpump timer today.
Success
Set sa10 to on
disconnected 30 wire to the left of the board (not actually shown on the page 14 of the manual but on my wrb09 it is next to(2 20) then 30 31 32 then 2 2 etc) which is the link wire on my unit. I found it by tracing the link wire on the board.
connected this 30 wire through a second timer and back to where it was originally 30- bingo it all works
The program seems a little slower at start up and switch off as presumably it is checking more things.
When the second timer switches off the system closes down as normal but an error eo02 appears however this disappears when the timer switches on again and the system functions as normal.
« Last Edit: August 24, 2009, 05:28:38 PM by welshboy » Logged
Richard Owen
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« Reply #26 on: August 24, 2009, 05:16:14 PM »

Excellent news. I hope it's the same as mine.

Any chance of a photo?

Description was a bit cryptic for me.
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44 Yingli 230Wp panels feeding into 2x Solar Edge SE5000 inverters.
20x 58mm SE, 20x 58mm SW, Solar Thermal feeding 320l thermal store.
10kW heat pump.
300W of Hydro Power.
welshboy
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« Reply #27 on: August 26, 2009, 10:46:12 AM »

Richard -I will try and load a photo later.
List Problem today
I had set the supplied control cycle timer to come on at 6am and off at 11pm with the second timer controlling intermediate times.
It worked ok during the 6-11 period but once the first timer switched off  and then tried starting again the following day-  ie today an error eo01 appeared. Had to reset it- then ok

Beginning to look like it will need attention once each day- it is easy to set the on off time on the controller to be a convenient off time to enable the press reset on the control box -  a bit of a pain but better than the supplied control methods.
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sleepybubble
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« Reply #28 on: August 26, 2009, 11:17:29 AM »

Can't you program it to be permanently on, so that the secondary controller is the only one that does anything? Then you wouldn't have to do the user interaction thing. I don't have a heat pump, just following out of curiousity.
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;-)
welshboy
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« Reply #29 on: August 26, 2009, 11:31:21 AM »

Sleepybubble -I had just reached the same conclusion. The manual does not say so but I think if I ignore the timer and just switch it on it is then on permanently-so the second timer does everything- going to try it now.
If it does work I intend using a room thermostat control /timer as I always thought the control was a bit crude just water temperature- when the sun(joke !) comes out the house warms but the heat pump only controls the water temperature in the under floor screed so it still pumps out heat.
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