Thermostat Setting; Reducing The Risk Of Scalding; Plumbing Connections; Connections To The Water Heater - Rinnai HOTFLO EHFA Series Installation Manual

THERMOSTAT SETTING

The thermostat setting can be adjusted between 60°C and 70°C� It has been factory pre-set to 70°C�
ThethermostatsettingsMUST ONLYbeadjustedbyaqualifiedperson.
WARNING

REDUCING THE RISK OF SCALDING

This water heater can deliver water at temperatures which can cause scalding� Children, disabled and the elderly
are at the highest risk or being scalded�
Local regulatory requirements and the requirements of AS/NZS 3500�4 MUSTBE considered regarding temperature
limitations of hot water delivered to areas used primarily for personal hygiene such as bathrooms and ensuites�
The delivery temperature may be limited to 45°C for early childhood centres, primary and secondary schools
and nursing homes or similar facilities for the young, aged, sick or people with disabilities and 50°C for all other
buildings� These temperatures will reduce the risk of scald injury and can be achieved by the use of a TLD, for
example a thermostatic mixing valve or tempering valve�
Rinnai recommend that an approved TLD is fitted into the hot water pipe work from the water heater to areas used
primarily for personal hygiene such as bathrooms and ensuites to reduce the risk of scalding�
Refer to the installation configurations "Hot Water Plumbing System Example ‑ With TLD" on page 12 and "Hot
Water Plumbing System Example / Flow & Return Pipe Work ‑ With TLD" on page 13.

PLUMBING CONNECTIONS

Connections to the water heater

Refer to Specifications for the plumbing connection sizes and location (Table 1) and the specified pressure ratings
of valves (Table 2). Refer also to the diagrams under "Installation Configurations".
ValveswithpressureratingsotherthanspecifiedMUST NOTbeused.
WARNING
An isolation valve and non-return valve MUSTBE fitted in the cold water supply to the water heater so the water
heater can be isolated� Combination isolation and non-return valve such as 'Duo' or 'Trio' valves are suitable for
this purpose�
Isolation valves MUSTNOT be fitted directly to the appliance. Use disconnection unions between the water heater
and the valves to allow the water heater to be disconnected from pipework at a later date�
Purge pipework to remove swarf and other foreign matter before final connection to the water heater to avoid
damage to the water heater�
If olive compression fittings are used for connections the olives MUSTBE metallic such as brass or copper� Only
approved thread sealing tape or sealant should be used�

Water Pipes

Pipe sizing should be carried out by persons competent to do so for each individual installation in accordance with
local regulatory requirements and take into consideration the specifications of the water heater.
The cold supply pipe to and hot water pipe from the water heater MUSTBE insulated in accordance with local
regulatory requirements and AS/NZS 3500.4 to optimise performance and energy efficiency. Insulation MUSTBE
weatherproof and UV resistant if exposed�
The hot water pipe from the outlet of the water heater should also be configured in the shape of a "heat trap" to aid
energy efficiency in accordance with local regulatory requirements and AS/NZS3500.4.
To prevent damage to the water heater when attaching pipe clips or saddles to the jacket, it is recommended that
self drilling screws with a maximum length of 12mm are used� If drilling is required take extreme care NOT to
penetrate the inner cylinder� Damage to the inner cylinder is NOT covered under warranty�
Rinnai 15
INSTALLATION
EHFA/EHFD HW IM