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Remeha Gas 320 Ace Manual

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Values at low load for BREEAM with
G20 (H gas)
O2 (%)(1)(2) CO2 (%) (3)(4)
Gas 620 Ace 1150 6.6(1) – 7.2 7.7 – 8.0(3)
Gas 620 Ace 1300 6.6(1) – 7.2 7.7 – 8.0(3)
(1) Nominal value
(2) These values are only applicable when the fan speeds have been set
for BREEAM.
(3) Nominal value
(4) These values are only applicable when the fan speeds have been set
for BREEAM.
4. If the measured value is outside of the values given in the table,
correct the gas/air ratio.
5. Use the adjustment screw B to set the percentage of O2/CO2 for the
gas type being used to the nominal value.
Increasing the gas flow, will decrease O2 and increase CO2. The
direction in which the adjusting screw must be turned to increase or
decrease the gas flow is indicated on the gas control valve. The 5- to
9-section boilers are supplied with a different gas control valve from
the 10-section boiler. See drawing for the position of adjusting screw
B for low load.
6. Check the flame through the inspection glass. The flame must not
blow off.
7. Repeat the full load test and the low load test as often as necessary
until the correct values are obtained.
8. Set the boiler back to the normal operating status.
7.3 Final instructions
1. Remove the measuring equipment.
2. Screw the cap on to the flue gas measuring point.
3. Seal the gas valve unit.
4. Put the front casing back.
5. Heat up the central heating system to approximately 70°C.
6. Switch the boiler off.
7. Vent the central heating system after approx. 10 minutes.
8. Turn on the boiler.
9. Check the water pressure. If necessary, top up the central heating
system.
Fig.86 Adjusting screw B
AD-0000493-01
B
3
B
2.5
7 Commissioning
52 7734324 - v.06 - 01102021
… 52 …


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