There is water discharging from the Zeroth Unit?

Water Discharge From the Zeroth Unit

If you notice water discharging from your Zeroth unit, the cause will depend on where the discharge is coming from.

Identify the Location of the Discharge

1. Discharge via the tundish
   • This may be caused by an issue with the expansion vessel charge.
   • This may indicate a failure of the pressure relief valve.
   • This may indicate a failure of the pressure‑reducing valve.
   • This may indicate a thermostat/cut-out failure on the back-up immersion heater.

2. Discharge from the Pressure Relief Valve (PRV) during hot water mode
   • This may be due to insufficient charge in the hot water expansion vessel.

3. Discharge from the Pressure Relief Valve (PRV) during space heating mode
   • This may be due to insufficient charge in the space heating expansion vessel.

Applicable models:

ZHP4-180C, ZHP4-180C-01, ZHP4-180H, ZHP4-180H-01, ZHP6-180C, ZHP6-180C-01, ZHP6-180H, ZHP6-180H-01, ZHP9-180C-01, ZHP9-180H-01