INSTALLATION
24
SAFE TRAY
Where damage to property can occur in the event of the water heater
leaking, the water heater must be installed in a safe tray. Construction,
installation and draining of a safe tray must comply with AS/NZS 3500.4
and all local codes and regulatory authority requirements.
AS/NZS 3500.4 also has particular requirements when a safe tray must
be installed.
MAINS WATER SUPPLY
Where the mains water supply pressure exceeds that shown in the table below, an approved pressure limiting
valve is required and should be fitted as shown in the
on page 29.
Model
315
Temp press relief valve setting
1000 kPa
Expansion control valve setting*
850 kPa
Max. mains supply pressure
With expansion control valve
680 kPa
Without expansion control valve
800 kPa
* Expansion control valve not supplied with water heater
TANK WATER SUPPLY
If the water heater is supplied with water from a tank supply and a pressure pump system is not installed, then
the bottom of the supply tank must be at least 1 m above the highest point of the hot water plumbing system,
including the water heater. Care must be taken to avoid air locks. The cold water line to the water heater should
be adequately sized and fitted with a full flow gate valve or ball valve.
HOT WATER DELIVERY
This water heater can deliver water at temperatures which can cause scalding.
It is necessary and we recommend that a temperature limiting device be fitted between a Solahart 315PVV
water heater and the hot water outlets in any ablution area such as a bathroom or ensuite, to reduce the risk
of scalding. The installing plumber may have a legal obligation to ensure the installation of this water heater
meets the delivery water temperature requirements of AS/NZS 3500.4 so that scalding water temperatures
are not delivered to a bathroom, ensuite or other ablution area.
Where a temperature limiting device is installed adjacent to the water heater, the cold water line to the
temperature limiting device can be branched off the cold water line either before or after the isolation valve,
pressure limiting valve and non-return valve to the water heater. If an expansion control valve is required, it
must always be installed after the non-return valve and be the last valve prior to the water heater.
If a pressure limiting valve is installed on the cold water line to the water heater and the cold water line to a
temperature limiting device branches off before this valve or from another cold water line in the premises, then
a pressure limiting valve of an equal pressure setting may be required prior to the temperature limiting device.
LEGEND
Two Temperature Zones Using a Temperature Limiting Device
