Raypak B0147 Owner's Manual And Installation Instructions page 14

OUTDOOR INSTALLATION
For servicing allow at least 750 mm in front of the water heater for burner
removal and 450 mm on the water connections side for heat exchanger
servicing.
The water heater must NOT be installed inside any roofed structure or under
eaves, roof overhangs, or pool decks.
When installing the water heater on a raised base, the base material MUST be
solid and filled in (e.g. if steel mesh decking is used, a suitable plate material
must be installed to fill in the perforations) to prevent excessive drafts entering
the water heater from underneath.
The following distances extracted from the Australian Gas Installations
Standard AS/NZS 5601 must be observed:
At least 500 mm between the top of the flue terminal and the eaves.
At least 1 500 mm horizontally between the flue terminal and the edge of any opening into the building,
measured horizontally.
At least 500 mm between the flue terminal and a return wall or external corner, measured horizontally along the
wall.
At least 1 500 mm below any openable window.
At least 500 mm between the flue terminal and a fence, wall or other obstruction facing the terminal.
HIGH WIND CONDITIONS
In areas where high winds frequently occur, it WILL be necessary to:
Locate the water heater a minimum of one (1) metre away from high
vertical walls.
Install a wind break to protect the water heater from the prevailing winds.
147 Models Only: Replace the standard flue terminal with a HIGH WIND
top (at extra cost). A high wind top is not available for 109 models.
14
INSTALLATION