www.stromltd.com
STROM LIMITED
2020
34
Electric Boilers
SET PUMP SPEED & PURGE AIR
Before moving the boiler out of standby mode please check and complete the following actions:
1.
The boiler has been properly configured in the previous step.
2. The airvent on the pump is open with the dust cap moving freely.
3. Set the pump to pump speed one, this for many installations should be adequate.
The boiler can no be activated, press and hold the power button until the boiler bleeps and exits standby mode.
The first thing you will notice is the flashing Thermostat Status Symbol, this means that currently there is no
demand from the thermostat for heating.
Activate the thermostat so that it is now calling for heat, the Thermostat Status Symbol should now remain
static and lit. The pump will fire up and after a few seconds the ignition symbol should illuminate and heat
should start being produced.
While the pump is running you should begin to purge all air from the system by bleeding all radiators and airvents
in the system. Once bled the system should run almost silently with very little noise coming from the boiler or
pump. One all air is purged you can begin to alter the pump speed to suit your needs, normally a 15 to 20 degree
differential between the flow and return is desireable, and the pump speed can be increased or decreased to
achieve this differential.
You should also now take the time to set the Automatic Bypass Valve on the system, with all TRV’s on the
system open and the pump set at the correct speed set the Autobypass Valve to only just closed, now confirm
you have the correct setting by closing only one of the TRV’s, the bypass valve should now start to allow small
amounts of water to pass.
Finally now that all the air has been purged from the system check the final pressure reading of the heating circuit,
and top up if required. Once set please disconnect the filling loop or water supply to the water replenishment
valve, and ensure that all connections are capped off until required again at a future date.