Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Turn Hot Water Tap On
Attach pressure gauge to gas valve pressure outlet test point
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Allow the burner to ignite and establish.
1. Maximum burner pressure adjustment
Rotate the Max Adjustment (outer) nut on the modureg to set the maximum
gas pressure, turn the nut clockwise to increase and anti-clockwise to
decrease the pressure until the required pressure is achieved (see table).
2. Minimum burner pressure adjustment
Isolate Mains Power to appliance as per TOP's P4
Disconnect one lead to the gas valve modureg coil.
Mains power ON.
Allow the burner to ignite and establish.
While ensuring the max adjustment nut is held in position use a pozidrive screwdriver on the min adjustment, turn clockwise to increase and anti-clockwise to decrease until the required pressure is achieved (see table).