Alternative Flue Systems - Cwh 90 & 120 - andrews CWH30/200 Installation, Operation And Maintenance Manual

CWH90 & CWH120 ALTERNATIVE FLUE SYSTEMS
Flat roof Flas ing
E217
Angled r oof
flashing
E218
CWH90 max 50M Conventional
CWH120 max 40M Conventional
CWH90 and CWH120 max 14M Concentric
Over 1.5M use flue
condensetrap.
Condense Tap
To
drain
h
Can be cut to s uit
roof structure
MAXXfl o Water Heater
For concentric flue runs
reduce overall length by:
1.2M when using 90º bend
0.7M when using 45º bend
1.5M when using condense trap
Can be cut
to suit roof
structure
INSTALLATION • SECTION 3
Minimum clearence
between vertical
balanced flue terminals
600mm
Minimum clearence
between balanced
flue horizontal terminals
CWH90 max
50M Conventional
CWH120 max
40M Conventional
CWH90 max
14M Concentric
CWH120 max
14M Concentric
25 25