Potterton Envoy System 30 Installation & Service Instructions Manual page 7

Installation Requirements - Page 7
It is absolutely ESSENTIAL to ensure that products of
combustion discharging from the terminal cannot re-enter
the building, or any other adjacent building, through
ventilators, windows, doors, natural air infiltration, or forced
ventilation/air conditioning. If products of combustion are
found to be re-entering any building, the appliance MUST be
turned OFF IMMEDIATELY.
Flue Terminals
H,I
F acing T erminal
or Wall
Terminal position
A - Directly below an openable window, air vent or any other ventilation opening
B - Below gutters, soil pipes or drain pipes
C - Below eaves (Horizontal Flue Only)
* - Below balconies/Carport Roof
E - From vertical soil pipes or drain pipes
F - From an internal or external corner
G - Above adjacent ground or balcony level
H - From a surface facing the terminal
I - From a terminal facing the terminal
* - From opening (Door/Window) in carport into dwelling
K - Vertically from a terminal on the same wall
L - Horizontally from a terminal on the same wall
M - Adjacent to opening
N - Above roof level (to base of terminal)
P - From adjacent wall to flue
Q - From internal corner to flue
* - Below eaves or balcony (Vertical flue)
S - From facing terminal
Supplied By www.heating spares.co Tel. 0161 620 6677
G
R
A
Q
N
P
Vertical Flues
A
A
F
E
G
G
N
N
S
Q
Horizontal Flues
C
B,C
B,C
K
K
L
L
K
F F
G
G
Minimum spacing
300 mm
75 mm
200 mm
Not Recommended
75 mm
300 mm
300 mm
2000 mm
2000 mm
Not Recommended
1500 mm
300 mm
300 mm
300 mm
300 mm
400 mm
Not Recommend
2000
Fig.3