Nu-Flame CHESNEYS ALCHEMY EVOLUTION PLUS N2 Use & Maintenance Instructions page 3

Natural Gas Models (For G20 Gas) – Manual Control (M)
Burner Model Flue Classes
N2 Classes 1 & 2
N2I Class 1 Only
N3R Classes 1 & 2
N3I Class 1 Only
N5R Classes 1 & 2
N5 Class 1 Only
Natural Gas Models (For G20 Gas) – TESC Remote Control (RF)
Burner Model Flue Classes
N2 Classes 1 & 2
N2I Class 1 Only
N3R Classes 1 & 2
N3I Class 1 Only
N5R Classes 1 & 2
N5 Class 1 Only
a. Ensure that the builders opening, flue & hearth for the appliance are constructed from non-combustible materials, and
conform to National Regulations and Local Codes.
Models with a 6.9kW input nett or less require a minimum flue diameter of 125mm or equivalent area (Class 2) subject to
proper clearing of products of combustion i.e. no spillage.
Models over 6.9kW input nett require a minimum flue diameter 175mm or equivalent area (Class 1) subject to proper
clearing of products of combustion i.e. no spillage.
b. The flue MUST be free of any obstructions. Any dampers or restrictors MUST be removed. Some dampers are impractical to
remove; therefore they must be fixed in some way in the OPEN position.
c. The chimney/flue should be swept prior to installation of the appliance.
d. Ensure that only one fireplace is served by the flue system.
e. Ensure that the chimney/flue is continuous from inlet to termination.
f. Ensure that the chimney/flue is structurally sound, so that combustion products do not come into contact with combustible
material outside the chimney.
g. Ensure that there is a smooth tapered transition from the fireplace opening to the flue.
h. If the appliance is to be installed under a canopy, or is open on both sides, great care must be taken to ensure the
configuration is correct. If in any doubt seek expert advice.
i. CHECK FLUE PULL. Apply a smoke match to the flue opening at hearth level and observe smoke. If there is a definite flow
into the flue aperture, proceed with installation. If there is not a definite flow into the flue aperture, preheat the flue for
approximately 10 minutes and re-test. If there is still no definite flow towards the flue aperture the flue may need attention. DO
NOT FIT THE APPLIANCE, SEEK EXPERT ADVICE.
THE CONNECTION, VENTILATION REQUIREMENTS (IF ANY) & INSTALLATION OF THE APPLIANCE MUST BE IN
ACCORDANCE WITH NATIONAL REGULATIONS AND LOCAL CODES. IF IN ANY DOUBT WITH REGARD TO ANY
VENTILATION REQUIREMENTS SEEK EXPERT ADVICE. NOTE. In the UK Models with 6.9kW input nett or less do not require
additional room ventilation. In Eire all Evolution Plus Fires require additional room ventilation. For other countries refer to National
Regulations and Local Codes.
INSTALLATION & SERVICING INSTRUCTIONS
Category
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2H
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2H
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2H
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2H
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2H
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2H
Category
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2H
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2H
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2H
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2H
FLUE REQUIREMENTS
ALCHEMY
Gas Injector Size
G20 510
G20 750
G20 510
G20 1050
G20 510
G20 1000
ALCHEMY
Gas Injector Size
G20 650
G20 1200
G20 650
G20 1500
G20 650
G20 1200
VENTILATION
Page 3 of 12
(
continued)
kW Input Net Burner Pressure
(High Flame) (High Flame)
6.9 16.5 mbar
9.9 14.7 mbar
6.9 16.5 mbar
11 12.0 mbar
6.9 16.5 mbar
10.5 11.2 mbar
kW Input Net Burner Pressure
(High Flame) (High Flame)
6.9 9.2 mbar
9.9 7.0 mbar
6.9 9.7 mbar
11 5.6 mbar
6.9 8.8 mbar
10.5 7.7 mbar