Rheem 627 series Owner's Manual And Installation Instructions page 73

MULTIPLE WATER HEATER FLUE INSTALLATION
Where multiple water heaters are installed, each water heater must be individually flued to the outside. A
common flue system MUST NOT be used.
For a multiple unit installation, the water heater is certified for installation with zero clearance between
adjacent water heaters.
If the water heaters are mounted on a wall, although they are certified for installation with zero clearance
between them, it may be necessary to leave a suitable space of a minimum 175 mm between each water
heater if a Condensate Trap and condensate drain line is to be installed. The Condensate Trap and
condensate drain line would located between each water heater with the common drain manifold positioned
below the water heaters. Refer to
Installation"
on page 74.
"Flue Terminal Location"
Refer to
with AS 5601 or AS/NZS 5601.1.
Follow the relevant instructions pertaining to the type of flue installation, with the following additional
requirements in relation to flue terminal clearances to be taken into account. The distances are based on
using the coaxial flue system components.
Vertical Flue Terminations
The minimum side by side centre to centre distance
1.
between flue terminals is to be no less than 360 mm.
2. The minimum back to back centre to centre distance
between flue terminals is to be no less than 570 mm.
Horizontal Flue Terminations
The minimum horizontal centre to centre distance between
1.
flue terminals is to be no less than 360 mm.
The minimum vertical centre to centre distance between
2.
flue terminals is to be no less than 570 mm.
360
horizontal flue terminations
"Multiple Water Heater Condensate Trap and Condensate Drain Line
on page 61 for flue terminal clearances from other objects in accordance
570
ABOVE
AND
BELOW
360
73
FLUEING
vertical flue terminations