7219708 - 01 (04/15)
EcoBlue System
59
Maintenance
10
10.3.13 Safety Pressure Relief Valve (Fig. 59)
1. Close the flow and return isolation taps and drain the primary
circuit.
2. To aid access disconnect the igniter plug & disconnect the two
pipes from the top of the condensate trap and the drain pipe from
the trap outlet. Undo the screw & washer securing the trap to the
boiler lower panel.
3. Disengage the lip on the trap from the slotted bracket and
remove the trap, taking care not to spill any residual condensate.
4. Disconnect the discharge pipe from the pressure relief valve
and remove the sealing grommet.
5. Pull off the clip retaining the valve and withdraw it from the
outlet assembly.
6. Fit the new valve and ‘O’ ring seal and reconnect the
discharge pipe. Ensure the grommet is in place to maintain the
integrity of the case seal. Refit the condensate trap.
10.3.14 Heating Pressure Gauge (Figs. 60 & 61)
1. Close the flow and return isolation taps and drain the primary
circuit.
2. Hinge the control box downwards. To aid access remove the
diverter valve motor. Remove the clip securing the pressure
gauge capillary to the hydraulic assembly.
3. Disengage the securing tabs and open the terminal block
cover. Prise apart the clips that hold the gauge cap.
4. Remove the gauge, cap and gasket.
5. Fit the new gauge, ensuring that the capillary is routed to
prevent any sharp bends. Locate the ridge on the gauge body in
the slot in the control box.
6. Reassemble in reverse order and ensure the gasket is in
position to maintain the integrity of the case seal.
Fig. 61
Heating Pressure
Gauge Capillary
Clip
Clip
‘O’ Ring Seal
Pressure
Relief Valve
Discharge
Pipe
Control Box
removed for clarity
Fig. 59
Fig. 60
Heating
Pressure
Gauge
