FLUEING
41
MULTIPLE WATER HEATER CONDENSATE TRAP AND CONDENSATE DRAIN LINE INSTALLATION
Depending upon the type of installation, it may be necessary to install a Condensate Trap and condensate
drain line to each water heater. Refer to
“Draining the Condensate”
on page 29.
The drain line from each Condensate Trap may be:
drained separately to a discharge point, or
manifolded together with a single drain line running to a discharge point.
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.
Condensate Traps with Common Drain Line
1.
Remove the clamp and rubber cap from the condensate drain spigot on each water heater flue outlet
assembly.
2.
Locate and install the Condensate Trap in a suitable position adjacent to the water heater.
Refer to steps 2 to 4 of the procedure outlined in
“Condensate Trap and Condensate Drain Line”
on
page 30.
If the drain line from each Condensate Trap is to be run separately to a discharge point, then proceed to
step 4, otherwise continue with step 3.
3.
Manifold the drain lines from each Condensate Trap into a common header.
Use UPVC, PE or similar, do not use copper.
Ensure adequate fall is provided in the header to allow for complete drainage.
It may be necessary to support the drain line manifold with suitable hangers from the ceiling.
condensate drain common manifold
4.
Plumb the outlet of each Condensate Trap or the drain line manifold to a suitable discharge point.
The drain line should be as short as possible, have a continuous fall all the way from the Condensate
Trap or drain line manifold to the discharge outlet and have no tap, valves or other restrictions in the
pipe work. The outlet of the drain line must be in such a position that flow can be easily seen, but
arranged so the condensate will not cause injury, damage or nuisance.