Commissioning; Filling The Water System - Biasi RIVA OV M110.18SM/OV User Manual And Installation Instructions

5 Commissioning & Testing
5.1

Filling the Water System

Before commissioning the appliance, the whole
gas installation including the meter MUST be
purged and tested for gas tightness in
accordance with BS 6891: 1988.
!
Open all
extinguish naked lights, and DO NOT
SMOKE whilst purging the gas line.
Before commencing
procedure, ensure that the gas service cock is
turned on, the electricity supply is isolated, and
that the CH pipe-work is complete. Fill the
water systems by following the procedure
detailed below in steps a) and b), and referring
to Figure 21.
It is recommended, where possible, to flush
the CH system without the appliance fitted, to
avoid debris and flux blocking the waterways
within the appliance.
Fig 21. Commissioning the Water System
a) All Systems
A competent person in
current issue of BS6798 should carry out

commissioning.

Fill the system with cold water. Vent the system
via the radiator valves and system air vents in
accordance with normal practice. Ensure that all
system air vents are closed.
To aid venting, a manual air vent is provided
on the LHS of the heat exchanger.
22
doors and windows,
the commissioning
accordance with the
Check the system for soundness.
Drain the entire system to flush out any debris,
and refill making sure that all the air is properly
vented from the system and pump. Repeat this
instruction with the
recommended that the system be cleaned with a
recognised system cleaner such as Fernox or
Sentinel.
Prior to lighting the appliance to check the gas
rates, the central heating system should be
checked for circulation by operating the
appliance with the gas turned off, this is to
ensure that no air locks occur. The appliance may
go into ignition lockout and require resetting.
b) Sealed Systems
When fitting the boiler into a sealed system, it will
be necessary to fit an expansion vessel, pressure
gauge and pressure relief valve, external to the
boiler. These items are available from most
plumbing suppliers.
Fill the system until the pressure gauge registers
2.0 bar. Clear any locks and check for
soundness.
Check the operation of the pressure relief valve
(figure 22) by lifting the lever or turning the knob
on the valve gently to ease the valve of its seat.
Checking that water is discharged, release the
lever and ensure that the valve seats correctly
and does not leak. Where this is not possible a
manual check should be carried out.
Release the cold water to the initial design
pressure.
Do not use the pressure relief valve to drain
the system, because dirt or debris could
prevent the valve seating correctly. If the valve
leaks or sticks closed, then replace it.
Fig 22.
NOTE: THESE COMPONENTS ARE NOT SUPPLIED BY BIASI UK
system hot. It is
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