AquaMAX G270VE Series - Manual (Page 28)

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additional bends. Where the distance to the point of final discharge
exceeds this length, the drain line can discharge into a tundish.
Subject to local regulatory authority approval, the drain lines from the ECV
and PTR valve from an individual water heater may be interconnected.
The outlet of a drain line must be in such a position that flow out of the pipe
can be easily seen, but arranged so discharge will not cause injury,
damage or nuisance. The termination point of a drain line must comply with
the requirements of AS/NZS 3500.4. Drain lines must not discharge into a
safe tray.
In locations where water pipes are prone to freezing, drain lines must be
insulated, must not exceed 300mm in length and are to discharge into a
tundish through an air gap of between 75mm and 150mm.
If a drain line discharges into a tundish, the drain line from the tundish must
be not less than DN20. The drain line from a tundish must meet the same
requirements as for a drain line from a relief valve.
Warning: As the function of the PTR valve on this water heater is to
discharge high temperature water under certain conditions, it is strongly
recommended the pipe work downstream of the relief valve be capable of
carrying water exceeding 93°C. Failure to observe this precaution may
result in damage to pipe work and property.
Pipe sizes
To achieve true mains pressure operation, the cold water line to the water
heater should be the same size or larger than the hot water line from the
water heater.
Hot water system pipe work must be sized according to the individual
application by persons competent to do so. Reference to the technical
specifications of the water heater and local regulatory authority
requirements must be made.
Pipe Work Insulation
To reduce heat loss, the cold water line to and the hot water line from the
water heater must be insulated in accordance with the requirements of
AS/NZS 3500.4. The insulation must be weatherproof and UV resistant if
exposed.
Saddling Pipe Work
To prevent damage to the storage cylinder it is not permissible to drill
through the jacket of the water heater except when attaching a Flashing Kit.
Refer to ‘Flashing Kit’ on page 23.
Note: If the water heater or storage