June 17, 20224 yr Hi, I've bought a 2nd hand Enerflow air/water heat pump, unfortunately the whole casing has been painted, so i cannot verify any sort of specifications or model, but it does seem to be a enerflow ERHPSU08E-MS 3kw from what i have narrowed down. as for the generation i'm not sure. But they don't seem to offer much information as to wiring and plumbing diagrams on their manuals, which is a bit frustrating I Have only found this Diagram on the back of some casing below which is for more the internal components Anyway the model offers the option to link your geyser element to the heat pump for extra heating/failure ect.. Now i'm trying to figure out, does my thermostat now wire from Geyser -> Heatpump -> DB Board. and would the heat pump be able to handle a large element? Or would you bridge into the thermostat from the heat pump, leaving the geyser original wiring from DB board? Thanks
June 17, 20224 yr 2 hours ago, R3plic8 said: Hi, I've bought a 2nd hand Enerflow air/water heat pump, unfortunately the whole casing has been painted, so i cannot verify any sort of specifications or model, but it does seem to be a enerflow ERHPSU08E-MS 3kw from what i have narrowed down. as for the generation i'm not sure. But they don't seem to offer much information as to wiring and plumbing diagrams on their manuals, which is a bit frustrating I Have only found this Diagram on the back of some casing below which is for more the internal components Anyway the model offers the option to link your geyser element to the heat pump for extra heating/failure ect.. Now i'm trying to figure out, does my thermostat now wire from Geyser -> Heatpump -> DB Board. and would the heat pump be able to handle a large element? Or would you bridge into the thermostat from the heat pump, leaving the geyser original wiring from DB board? Thanks Not sure about your heat pump. Mine has a low current relay contact which you have to use to pick up another relay that can then supply the 14A(3kw) current to the element. The heat pump thermostat stays to the pump controller. The PCB will then just get the signal to power up the small relay on the PCB. The contacts of this relay will be on terminals close to the PCB. That's how mine is wired.
June 17, 20224 yr Author 53 minutes ago, Scorp007 said: Not sure about your heat pump. Mine has a low current relay contact which you have to use to pick up another relay that can then supply the 14A(3kw) current to the element. The heat pump thermostat stays to the pump controller. The PCB will then just get the signal to power up the small relay on the PCB. The contacts of this relay will be on terminals close to the PCB. That's how mine is wired. Ok, Thanks for the reply, If i gather correctly, you just using the PCB to operate the relay for geyser element? I Think this is slightly different as i only see 2 ports for the geyser(Top left of diagram) saying Neutral and HT (To Electric Heater) I presume under that method of yours there would be a 3rd data signal cable for the relay?
June 17, 20224 yr 20 minutes ago, R3plic8 said: Ok, Thanks for the reply, If i gather correctly, you just using the PCB to operate the relay for geyser element? I Think this is slightly different as i only see 2 ports for the geyser(Top left of diagram) saying Neutral and HT (To Electric Heater) I presume under that method of yours there would be a 3rd data signal cable for the relay? No in my case there is the high current 220V AC connection point. Then a terminal strip with about 6 terminals. The thermostat and controller have their own separate different connection block. Due to the elec geyser switch and overcurrent protection it would seem the contact used to switch the element is a heavy duty. This means the 2 wires can go straight to the element. I have never had the need to use my elec element. The pump just runs longer. In my pump the element relay also only closes below 4 deg ambient temp. So above that the elec element cannot be powered. Edited June 17, 20224 yr by Scorp007
June 17, 20224 yr Author If i have a look at the latest spec sheets and the wiring diagram again & i presume the generations are quite similar. I do see it now says a element rating current of 14A. Max size 3KW. (Didnt click earlier) Looking at the wiring diagram it does seem the Water heater connection and neutral are linking back the the Heat pumps AC in. So I think the Unit does support the amperage of the element and the heat pump. I Gather my cable size then is going to have to support the 14A + 2.7A from the rated heat pump. https://www.enerflow.co.za/images/Specsheets_Rev1/rhp_specsheet_digital_rev1.pdf Edited June 17, 20224 yr by R3plic8
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.