Commissioning; Filling, Flushing And Maintenance; Checking The Expansion Vessel; Filling The Inoxstor - Immergas Inoxstor 200 Installation, Usage And Maintenance Instructions

6.

COMMISSIONING

It is important to follow the steps outlined below during commissioning of the Inoxstor. This refers to operation
of the inoxstor itself. Read the Audax Instructions carefully for information on commissioning the heat pump
and central heating circuit.
Do not switch on the electrical supply or Audax Heat Pump until the unit has been filled with water and checked for leaks.
Check that all installation, electrical and discharge pipe requirements have been met. Check that all water and electrical
connections are tight and properly connected.
• Check charge pressure of expansion vessel as per section 7.1 of these instructions..
• Fill the Inoxstor as per section 7.2.
• Test the operation of the safety devices as per section 7.3.
• Fill the Audax and central heating system as per section 7.4.
See section 8 of these instructions for suggested Audax settings which are compatible with the Inoxstor pre-plumbed
water heater.
Switch on the electrical supply to the Inoxstor and Audax heat pump. Verify that the Audax is running and that water is
heated and that the thermostatic controls work correctly.
Turn on the Zone 1 thermostat input TH1 on the Audax Interface Board. Verify that the three way valve moves position and
that the zone valve opens.Turn off TH1 and ensure that the zone valve closes and the three way valve returns to the hot
water position. Repeat for TH2.
Annual maintenance of the system should be carried out. See section 7.5.
7.

FILLING, FLUSHING AND MAINTENANCE

WARNING - DO NOT disconnect power to the Audax in cold weather in order to prevent frost damage. Do not
turn off power to the audax or disable circulation for longer than is necessary to carry out maintenance. If
it is necessary to turn off power to the audax for longer periods, drain down the system or ensure a suitable
quantity of glycol antifreeze is added to the system water.
7.1

CHECKING THE EXPANSION VESSEL

The charge pressure of the expansion vessel should be checked during commissioning and again annually. During the
annual check, switch off power to Inoxstor and Audax.
1. Close the water inlet valve.
2. Open a hot water tap in order to reduce pressure in the cylinder.
3. Remove the black cap on the end of the expansion vessel. Check the pressure with a good quality tyre gauge.
4. The charge pressure can then be checked against the vessel nameplates by using a good tyre gauge.
5. If it is low then replenish it by using a nitrogen gas bottle with regulating valve, or a foot pump. The pressure will nor-
mally be set to 3.5 bar.
6. Any fluid escaping from the expansion vessel valve indicates a leaking diaphragm and the vessel should be replaced.
7.2

FILLING THE INOXSTOR

1. DO NOT switch on the Inoxstor or Audax until the system has been completely filled.
2. Close the drain valve.
3. With hot tap open, turn on the cold water supply. When water flows from the hot tap allow to flow for a short while to
purge air and to flush through any disturbed particles.
4. Close hot tap and then open successive hot taps in system to purge any air.
Inoxstor Pre-Plumbed Water Heater Installation, Usage and Maintenance Instructions
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