evening,
has anyone installed the air to water heating systems, im on my 4th install and have to wire in a condensate pump any ideas how it should be wired in , ive got a switched fused spur feeding it and its feeding one of the black wires out of the pump but unsure were to wire the second black wire too.
any ideas would be grateful,
many thanks,
Darren.

Dont they just need a perm feed as they have their own float operated switch that pumps out when the level is reached.

on the pump theres a live neutral earth and a cable which is the 2 black wires.

Generally the black wires N/C go in between the boiler feed / air pump so if the condensate pump fails and fills up the float switch shuts down the boiler / pump.

The other alternative is to use the two N/C black wires for an alarm.

regards

-------------------------
"Take nothing but a picture,
leave nothing but footprints!"
-------------------------
"Oh! The drama of it all."
-------------------------
"You can throw all the philosophy you like at the problem, but at the end of the day it's just basic electrical theory!"
-------------------------

ive connected 1 black wire to the live load on the spur, do i connect the other black wire to the live link from control panel to heat pump, (also know as s1

The 2 other cables are volt free contacts, generally used in air con, if the condensate pump fails, these contacts turn off the internal unit

I would say yes, but what do the manufacturers instructions say?

The purpose of these two volt-free black N/C wires is to warn/interrupt the supply to the system if the condensate pump fails otherwise it will still condensate and flood the kitchen, loft or wherever it is situated, I am not conversant with your system but many moons ago I used to connect them to the terminals that controlled the inside and outside units on an A/C system and it also triggered an alarm as well.

regards

-------------------------
"Take nothing but a picture,
leave nothing but footprints!"
-------------------------
"Oh! The drama of it all."
-------------------------
"You can throw all the philosophy you like at the problem, but at the end of the day it's just basic electrical theory!"
-------------------------

on the wiring diagram it shows one going to the perm live and the other
to the boiler, im unsure where to wire them on the air source system

Assuming the switch can handle 230 vac

You are basically adding a one way switch in line

Feed to first black wire. Second black wire to boiler.

You have a feed that is interupted by the float switch, i cant remember if its n/o or n/c

so on this system i need to connect the second wire to the s1 as the s2 and s3 is 24v dc. which is the interlink cable between the control panel and the heat pump.
or take out the cable to s1 and connect it to the first black wire and connect the second black wire to s1.

Can you post a link to the website or scan in a schematic and upload it?

Racking my brains a bit here because of the length of time off the tools (sort of) but I have a feeling that on the Mitsubishi units S1 is not used and the two black wires are connected to S2 and S3 but you may also have to flick a DIP switch as well as with A/C units, probably the prudent thing to do is contact the manufacturer in the morning to be on the safe side.

regards

-------------------------
"Take nothing but a picture,
leave nothing but footprints!"
-------------------------
"Oh! The drama of it all."
-------------------------
"You can throw all the philosophy you like at the problem, but at the end of the day it's just basic electrical theory!"
-------------------------

Edited: 20 June 2012 at 10:04 PM by rocknroll

hi this is the exact one being fitted,
http://www.sauermannpumps.com/...I1821_instructions.pdf

I would connect it up as the manufacturers instructions on page 7

Presumably in series with the HP's 'call for heat' line.

Do make sure it's not interconnecting two different circuits though - e.g. if you had a separate fused spur for the pump from the HP supply. It wouldn't be nice to isolate one and have it energised from the other!

- Andy.