Raypak B0507 Owner's Manual And Installation Instructions page 14

INSTALLATION
Operation Type
Relief Valve Setting
Water Heating (kPa)
Mechanical Heating (kPa)
Expansion Control Valve (ECV²) Setting
Water Heating (kPa)
Mechanical Heating (kPa)
Minimum Supply Pressure
System water temperatures up to 65°C (kPa)
System water temperatures above 65°C (kPa)
Maximum Supply Pressure
with ECV² fitted
Water Heating (kPa)
Mechanical Heating (kPa)
without ECV² fitted
Water Heating (kPa)
Mechanical Heating (kPa)
¹ Figures in brackets are to be used if a Wilson stainless steel storage tank is utilised in the system.
² Expansion control valve is not supplied with the water heater.
³ An 850 kPa relief valve can be fitted to modulating water heaters when used in water heating applications.
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 height to the bottom of the supply tank must be as
specified in the table shown opposite.
HOT WATER DELIVERY (WATER HEATING APPLICATIONS)
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 the water heating system
and the hot water outlets in any ablution and public areas such as bathrooms, ensuites or public amenities, 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 or public area.
Where a temperature limiting device is installed adjacent to the hot water storage tanks, 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 storage tanks. 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 heating system.
If a pressure limiting valve is installed on the cold water line to the water heating system 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.
REDUCING HEAT LOSSES (WATER HEATING APPLICATIONS)
The cold water line to and the hot water line from the storage cylinder must be insulated in accordance with the
requirements of AS/NZS 3500.4. The insulation must be weatherproof and UV resistant if exposed.
Keep temperature settings down. Lower temperatures reduce heat losses and prolong storage cylinder life. Do not
set the electronic thermostat set point above 70°C unless it is necessary. A time clock to control the electrical
supply can be used to switch off the water heater during hours or days when it is not in use.
Energy consumption can be reduced by installing a remote thermostat and Economaster run on timer (supplied
separately) to turn off the primary circulating pump after a short period of time when heating has been satisfied.
Pressure Specifications
System water temperatures up to 65°C
System water temperatures above 65°C
14
On/Off Modulating
850 (700)¹ 850 (700)¹ ³
- 415
700 (550)¹ 700 (550)¹ ³
- -
70 70
120 120
680 (550)¹ 680 (550)¹ ³
- 330
550 (450)¹
550 (450)¹ ³
-
-
Minimum Tank Height
7 metres
12 metres