Issue Date: 01.06.16
Review Date: 01.06.16
H0024 028626 A
Installation Manual for EHW Tanks: MAN_INST_TANK_SRT(AA)|4
CHAPTER 2:
WARNINGS
AND
PRECAUTIONS
2.1 INSTALLER REQUIREMENTS
Installation of a system must be completed by a licensed
plumber and in accordance with the requirements listed
below, as well as any relevant local standards and
regulations.
AS/NZS 3500.4 - National Plumbing and Drainage
Code
AS/NZS 4234.2008 - Heated Water Systems -
Calculation of Energy Consumption
2.2 OCCUPATIONAL HEALTH AND SAFETY
The installer must adhere to occupational health and
safety guidelines and other relevant industry
associations. Under no circumstances should any installer
attempt to install an Apricus Electric Hot Water (EHW)
Tank without reading and understanding this installation
manual. For any queries Apricus staff may be contacted
on 1300 277 428.
2.3 OVER PRESSURE AND TEMPERATURE
PROTECTION
2.3.1 PTRV
Any system design must allow a means of pressure
release at no more than 850kPa, using a PTRV. The PTRV
must have a downward direction copper pipe connected
that is open to the atmosphere, running the expelled hot
water or air to a safe, frost free and appropriate drainage
location. From time to time the PTRV may discharge small
amounts of water under normal operations, this can be
up to 10% of tank capacity. If the tank is installed indoors,
a safe-tray must be installed beneath the EHW tank to
safely collect any water expelled from the PTRV.
2.3.2 MAINS PRESSURE CONTROL
Where the mains supply pressure can exceed or fluctuate
beyond the pressure of 500kPa, a pressure-limiting valve
must be fitted to the cold mains line. The device is
installed after the duo valve (isolation valve and check
valve) and should have a pressure limit of 500kPa.
In some states it is a mandatory requirement that an
expansion control valve be fitted on the cold mains line
to provide a form of pressure relief. A separate drain line
must be run for this relief valve (as per AS/NZS 3500). If
unsure please check with the local authority.
Apricus recommends the use of an ECV on every
installation.
2.4 WATER QUALITY
2.4.1 WATER QUALITY THRESHOLDS
Water quality is an important aspect of system lifetime.
For the system to be warranted, the water used in the
system must meet the requirements outlined in Table 1.
Table 1 Water Quality Threshold Values
Total Dissolved Solids
< 600 mg/L or ppm
Total Hardness
< 200 mg/L or ppm
Electrical Conductivity
< 850 µS/cm
Chloride
< 250 mg/L or ppm
pH Level
Min 6.5 to Max. 8.5
Magnesium
< 10 mg/L or ppm
Sodium
< 150 mg/L or ppm
If in doubt contact your local water authority or have a
water test completed. In areas of poor water quality all
major components will have a reduced life due to the
hardness of the water. In areas with "hard water" (>200
mg/L or ppm), it is advised to install a water softening
device to ensure the long term efficient operation of the
system is met. It is also advisable that a glass-lined tank is
used as opposed to a stainless steel tank, since the glass-
lined tank has a sacrificial anode to protect from
corrosion. Apricus recommend the anode be inspected at
least every three (3) years, and serviced as required.