25
INSTALLATION INSTRUCTIONS
Venting
Appliance Vent Adapter
CAUTION:
Ensure that the appliance vent adapter is securely
attached to the water heater collar. Improperly
connected vent adapter can cause damage to the
appliance and/or poor performance.
Metal Fab Inc�, Rainbow, and Ubbink standard concentric
vent pipe can be installed into the water heater collar
without an appliance vent adapter�
NOTICE:
To install the appliance vent adapter, please
follow the appliance vent adapter manufacturer's
instructions.
Draining Vent Condensate
WARNINGS:
Failure to provide a vent condensate drain close
to the water heater could allow acidic flue gas
condensate to enter into water heater flueways,
causing premature failure of the water heater.
If the condensate collector is not used, the drain fitting
must be capped to prevent exhaust gases and condensate
from entering the building� The cap is supplied on the
water heater�
CAUTIONS:
Condensate is known to be acidic; refer to federal,
state (provincial), and local codes for proper
handling and discharge methods.
Condensate must be drained away from the water
heater and should not be allowed to drain back
into any part of the vent system.
The condensate collector must be used with
vertical vent installation.
Condensate collector must be used with horizontal
vent installation if the vent has an UPWARD slope
toward the termination.
Provision should be made to collect and dispose
of condensate from the venting systems.
When a water heater is vented horizontally, the
vent pipe should have a DOWNWARD or UPWARD
slope towards the termination. If an UPWARD
slope is used, always attach a drain hose to the
condensate collector and plumb the hose to a
sanitary sewer drain.
When a water heater is vented vertically, an
UPWARD slope must always be used. Always
attach a drain hose to the condensate collector
and plumb the hose to a sanitary sewer drain.
Properly installed condensate traps prevent the
condensate from draining back into the water
heater.
A high-temperature silicone tubing suitable for use
with acidic condensate and appropriate for the
temperature range should be used.
The drain tube is fashioned into a “pigtail” trap
and must be filled with water to prevent flue gases
from emitting into the building prior to operating
the water heater.
Downward Slope
(recommended)
Water
Filter
To Drain: Dispose of condensate
in accordance to local codes.
Union
Condensate Trap
Condensate Collector
Venting for Direct-Vent Water Heater
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