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  • FIRST POST
    • lovesgshp
    • By lovesgshp 6th Jan 11, 7:18 PM
    • 1,299Posts
    • 726Thanks
    lovesgshp
    Ground Source Heat Pumps
    • #1
    • 6th Jan 11, 7:18 PM
    Ground Source Heat Pumps 6th Jan 11 at 7:18 PM
    If anyone wants info on these, then please let me know, as have had one for over 5 years.
Page 53
    • lovesgshp
    • By lovesgshp 14th Jan 18, 6:34 PM
    • 1,299 Posts
    • 726 Thanks
    lovesgshp
    If with the capital letter, then that is active for the heating peak each week.
    If you scroll through the rest of the days, what do they show?
    Last edited by lovesgshp; 14-01-2018 at 6:51 PM.
    As Manuel says in Fawlty Towers: " I Know Nothing"
    • JHen
    • By JHen 14th Jan 18, 8:02 PM
    • 34 Posts
    • 4 Thanks
    JHen
    All the days are Uppercase and "off"
    • JHen
    • By JHen 20th Jan 18, 8:25 AM
    • 34 Posts
    • 4 Thanks
    JHen
    All the days are Uppercase and "off"
    Originally posted by JHen
    So should I change this so they are not "off" during the evening ?
    • beardymarrow
    • By beardymarrow 21st Jan 18, 1:11 PM
    • 144 Posts
    • 124 Thanks
    beardymarrow
    So should I change this so they are not "off" during the evening ?
    Originally posted by JHen
    Hi J, Sorry for the delay. Is this menu 4.1 where every day is in Uppercase and then says "off"?

    lowercase means that the HP does not lower its temperature on that day (Clock setting HP according to clock is off). Uppercase means that it lowers its temperature during the times shown(Clock setting HP according to clock is on), so I don't understand how it can show for example "Mo Off", it should show "Mo 22:00-06:00" for example which means that the HP will lower its temperature between 22:00 and 06:00. It lowers it by the amount in 4.1.1.

    Personally, I have played with these settings and found that it was counter productive to have the HP drop its temp overnight. In a well insulated house it takes so long for the actual temp to drop in the house that by the time it has it's morning again and the HP then has to work doubly hard to get back to temperature. More efficient and more comfortable, I have found, for my house, to keep the temperature constant 24x7, and just use the TRV in the bedroom to keep that room cool.

    Hope that makes sense

    Beardy
    • JHen
    • By JHen 22nd Jan 18, 8:20 AM
    • 34 Posts
    • 4 Thanks
    JHen
    All the days are Uppercase and "off"
    Originally posted by JHen
    Beardy - Many thanks.

    I have set these all back to lowercase for now, so I'll see how this works out.
    • lovesgshp
    • By lovesgshp 28th Feb 18, 2:12 PM
    • 1,299 Posts
    • 726 Thanks
    lovesgshp
    This may be of interest to anyone considering a gshp system.
    Last night, here in Italy we were at -11C at midnight and it was forecast to get to around -15 in the early hours.
    Heat pump has kept the house temp within 0.5C of the sensor setting constantly.(20C)
    Ground loops as of midday today are showing a inflow temperature of -0.9C and outflow after of -3.9C.
    There is no other type of heating working in the house.
    Domestic hot water is circa 48C, as that is the setting.
    As Manuel says in Fawlty Towers: " I Know Nothing"
    • beardymarrow
    • By beardymarrow 28th Feb 18, 2:45 PM
    • 144 Posts
    • 124 Thanks
    beardymarrow
    I can corroborate that in the UK at -6 last night.

    GT5 (indoor temp) has been between 18.4 and 18.9 (set at a target of 19.0) over the last 24Hrs.

    -4.4deg outflow and -0.9deg inflow.

    DHW at 50deg.

    You've got to love the whole house being a nice stable temperature, 24hours a day, with no cold bathroom in the middle of the night etc. Bliss!
    • RobertJr
    • By RobertJr 8th May 18, 10:44 PM
    • 6 Posts
    • 2 Thanks
    RobertJr
    Geothermal systems provide one of the most efficient, comfortable and environmentally friendly method of heating & cooling.
    • beardymarrow
    • By beardymarrow 9th May 18, 12:58 PM
    • 144 Posts
    • 124 Thanks
    beardymarrow
    Geothermal systems provide one of the most efficient, comfortable and environmentally friendly method of heating & cooling.
    Originally posted by RobertJr
    Yeah, so I hear. Do you have any data on comparison between GSHP and Geothermal in terms of running cost and install costs? I'd imagine the running costs are similar, as you've still got to pump the fluid around and more importantly run the compressor?

    Maybe geothermal are better if you've not got space for the GSHP slinkies, as you can go vertical?
    • RobertJr
    • By RobertJr 7th Jun 18, 7:07 PM
    • 6 Posts
    • 2 Thanks
    RobertJr
    Solar Assisted Mini-split

    The outdoor condensing unit is wired to municipal electric power, to continue to run during inclement weather and at night. Depending on your installation configuration, you can achieve a SEER rating of up to 32. The mini-split uses refrigerant as a thermal medium to dispense heat into ambient air in the summer; while absorbing heat from ambient air in the winter. The compact design allows for ground installation, or mounting in a variety of discreet locations, including on a wall, under a deck or even on a balcony.
    • lovesgshp
    • By lovesgshp 25th Jun 18, 10:40 PM
    • 1,299 Posts
    • 726 Thanks
    lovesgshp
    So Robertjr
    You know so much about these systems, you must have installed many and obviously have one yourself.

    I have one for over 13 years, as so do many clients of mine, so please give me some actual installation setups, as would be interested to hear your recommendations and obvious experience of these units.
    You are using another members picture, so think you are just
    a spammer
    Last edited by lovesgshp; 25-06-2018 at 11:06 PM.
    As Manuel says in Fawlty Towers: " I Know Nothing"
    • JHen
    • By JHen 13th Aug 18, 12:49 PM
    • 34 Posts
    • 4 Thanks
    JHen
    Alarm MB1 Compr. circ. switch
    Hi, just looked at my IVT today and noticed the above error! I have acknowledge but it still appears. I turned the off/on button and after the "countdown" the erroappears again. Just after the countdown and before the error I hear a water running noise.
    Can anyone advise?
    • beardymarrow
    • By beardymarrow 13th Aug 18, 1:01 PM
    • 144 Posts
    • 124 Thanks
    beardymarrow
    Hi JHen, That's caused by the electrical side of the compressor motor. Did you reset Fuse 1 after acknowledging the alarm? Might just be intermittent thing. If not, then the contactor (relay) is faulty, or there's a lose electrical connection to the compressor (worst case of course the compressor itself is faulty), but hopefully it's a cable or the contactor.
    • JHen
    • By JHen 13th Aug 18, 1:33 PM
    • 34 Posts
    • 4 Thanks
    JHen
    Hi Beardy, I've just reset this before seeing your reply. I saw this was suggested in a previous post.
    All appears to be ok now.

    Thanks for the prompt reply,
    • beardymarrow
    • By beardymarrow 13th Aug 18, 1:53 PM
    • 144 Posts
    • 124 Thanks
    beardymarrow
    Excellent. Glad it's worked. Obviously if it keeps happening it's a bigger problem, but fingers crossed.
    • lovesgshp
    • By lovesgshp 13th Aug 18, 2:48 PM
    • 1,299 Posts
    • 726 Thanks
    lovesgshp
    Seems I have little to do now, but will keep looking.
    As Manuel says in Fawlty Towers: " I Know Nothing"
    • johnoldhouse
    • By johnoldhouse 6th Sep 18, 10:57 AM
    • 4 Posts
    • 0 Thanks
    johnoldhouse
    I am sure I will have some questions for you soon. I have just installed a greenline 11E with the Rego637 controller. Bought it off ebay and have now connected it up to my existing heat store feeding mostly radiators and some UFH. Originally running on E11 with 9KW of immersion heating. A great believer in putting on a jumper if cold and have two wood burners and own supply of logs which helps a lot. Running it for hot water only so far but nights are getting colder and the HP is keen to heat the house as well.
    I am using OpenHAB to monitor the HP, Heat Meter and electrical use. No additional heat allowed (so far) and currently using the Ext input to only enable HP during low rate periods. Will be some months before I find out if it is effective at keeping the house warm but it has got to be better than the current direct immersion heater approach.
    Last edited by johnoldhouse; 08-09-2018 at 2:06 PM.
    • JHen
    • By JHen 8th Sep 18, 1:57 PM
    • 34 Posts
    • 4 Thanks
    JHen
    Hi The level on the expansion tank on my IVT has recently been running quite low. On two occasion this year I have needed to top this up with water. Is this something I should been concerned about ?
    • johnoldhouse
    • By johnoldhouse 8th Sep 18, 2:38 PM
    • 4 Posts
    • 0 Thanks
    johnoldhouse
    Radiator Return Temp control
    Might need some help understanding how the heat demand is managed. As I mentioned I have connected up OpenHAB to monitor the HP and with my heat store as a buffer us an external radiator circulation pump (G1). Up to now only Hot Water required but last night heating was called for when the outside temp dropped below 10C. The Radiator Return Target Temp (T1) was 13.4 whilst the Return Temp measured 20.3C when the circulation pump started. The pump stopped when the rad return dropped to 38C when the target was 14.8C.
    Am I misunderstanding what the rad return target is doing, I thought if the Rad return was above the target there would be no heating requirement?
    Last edited by johnoldhouse; 08-09-2018 at 3:02 PM.
    • lovesgshp
    • By lovesgshp 8th Sep 18, 7:41 PM
    • 1,299 Posts
    • 726 Thanks
    lovesgshp
    Hi The level on the expansion tank on my IVT has recently been running quite low. On two occasion this year I have needed to top this up with water. Is this something I should been concerned about ?
    Originally posted by JHen

    It could be just expansion of the outdoor pipes. If you have a pressure gauge fitted just make sure it is around 1 bar when not operating and 0.5 when running.
    As Manuel says in Fawlty Towers: " I Know Nothing"
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