555
WARNINGS AND PRECAUTIONS
TOTAL DISSOLVED SOLIDS
< 600 mg/L OR PPM
TOTAL HARDNESS
< 200 mg/L OR PPM
ELECTRICAL CONDUCTIVITY
< 850
µ
S/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
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
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 Thermann Electric Hot
Water (EHW) Tank without reading and understanding
this installation manual.
OVER PRESSURE AND TEMPERATURE
PROTECTION
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.
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 (ECV) 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.
Thermann recommends the use of an ECV on every
installation.
WATER QUALITY
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.
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. Thermann recommend the anode be
inspected at least every three (3) years, and serviced
as required.
Table 1 Water Quality Threshold Values
555
WARNINGS AND PRECAUTIONS
TOTAL DISSOLVED SOLIDS
< 600 mg/L OR PPM
TOTAL HARDNESS
< 200 mg/L OR PPM
ELECTRICAL CONDUCTIVITY
< 850
µ
S/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
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
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 Thermann Electric Hot
Water (EHW) Tank without reading and understanding
this installation manual.
OVER PRESSURE AND TEMPERATURE
PROTECTION
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.
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 (ECV) 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.
Thermann recommends the use of an ECV on every
installation.
WATER QUALITY
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.
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. Thermann recommend the anode be
inspected at least every three (3) years, and serviced
as required.
Table 1 Water Quality Threshold Values
