Installation Guide

Rinnai Australia 6 Flue Installation Manual
CONDENSATE DRAIN
The condensate trap and associated drain connection are integral with the appliance flue spigot. The condensate
trap collects any condensate from the flue system, thereby preventing condensate from entering the water heater
and causing damage.
A condensate drain tube kit is supplied with the terminals (FFWALLTERM and FFROOFCOWL) and will require
connection to the condensate drain connection in flue systems where the total length exceeds 1.5 metres AND
condensate cannot be drained via the flue terminal. Usually, the condensate drain tube requires connection in
‘vertical flue’ and ‘combined vertical & horizontal flue’ systems and does not require connection in ‘direct horizontal’
and ‘extended horizontal’ flue systems.
If the condensate drain tube is not required to be connected it is important to
keep the drain tube cap in place on the appliance flue spigot. It is only to be
removed if the condensate drain tube is connected (Fig. 11).
Appliances must not be operated with the drain tube cap removed and with no
condensate drain tube connected.
Because the condensate is a by-product of gas combustion it is mildly acidic.
For this reason copper tube and fittings MUST NOT be used as it will corrode.
Instead, Rinnai recommend plastic pipes and fittings such as Unplasticised
Polyvinyl Chloride (UPVC) or Polyethylene (PE) which is commonly used for
irrigation piping.
Important Considerations For The Condensate Drain Tube
Flue spigot with integral condensate trap. Water heater drain outlet connection is 16mm.
Aluminium condensate drain tube. (Supplied with flue terminals FFWALLTERM or FFROOFCOWL).
Silicone connection tube and retaining clips. (Supplied with flue terminals FFWALLTERM or FFROOFCOWL).
Continuous fall (of at least 2°) from water heater to discharge point. Lengths and bends in accordance with
‘length And Changes Of Direction’ table below.
16 mm UPVC conduit to terminate in accordance with .
Drainage tube to be sealed to conduit with approved silicone.
Suitable points of discharge are deemed to be drains, sewers or pits. DO NOT discharge onto electrical
connections, earth stakes, copper pipes, concrete paths or into a pond.
The content of AS/NZS 3500.4:2003 Section 5.12 ‘Temperature / Pressure Relief and Expansion
Control Valve Drain Lines’ has been used as a guide in preparing these considerations.
Lengths and changes of direction
Maximum length and changes of direction
greater than 45 ° should be as follows:
Max length (Metres) 9 8 7 6
Max changes of direction >45° 3 4 5 6
Drain Tube Cap
Fig. 11
2° fall
Fig. 12
A
B
DC
E
D
G
A B C
A B C
F
A
B
C
D
E
G
F
G