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CONNECTIONS – PLUMBING
CONNECTION SIZES
Model
Heat pump water heater inlet connection
Heat pump water heater outlet connection
Condensate drain connection
All plumbing work must be carried out by a qualified person and in accordance
with the Plumbing Standard AS/NZS 3500.4 and local authority requirements.
WATER INLET AND OUTLET
The pipe work must be cleared of foreign matter before connection and purged
before attempting to operate the water heater. All olive compression fittings must
use brass or copper olives. Use thread sealing tape or approved thread sealant
on all screwed fittings.
An isolation valve and non-return
valve must be installed on the cold
water line to the water heater system.
An acceptable arrangement is shown
in the diagram. Refer also to "Hot
Water Delivery" on page 21 and to
"Mains Water Supply" on page 21.
Disconnection unions are provided at
the cold side and hot side water inlets and outlets on the water heater to allow
for disconnection of the water heater. Use a spanner on the back nut when
tightening unions to prevent the pipe from rotating or twisting within the heat
pump.
PIPE SIZES
To achieve true mains pressure operation, the cold water line to the storage
tanks should be the same size or bigger than the hot water line from the storage
tanks.
The pipe sizing for hot water supply systems should be carried out by persons
competent to do so, choosing the most suitable pipe size for each individual
application. Reference to the technical specifications of the water heater and
local regulatory authority requirements must be made.
Refer to the table on page 33 for correct primary flow and return pipe sizing.
15kW
R1¼ BSPM
R1¼ BSPM
38
35kW
R2 BSPM
R2 BSPM
20mm O.D
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