Rheem Multipak MPE02, Руководство пользователя и инструкции по установке

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INSTALLATION - WATER HEATER
22
FROST PROTECTION
The water heater has a frost protection system. The frost protection system will protect the water heater from
damage, by preventing ice forming in the waterways of the water heater, in the event of freezing conditions
occurring.
The frost protection system will be rendered inoperable if electrical power is not available at the water heater.
Damage to the water heater caused by freezing of the pipe work to or from the water heater is not covered
under the Rheem warranty. Refer to AS/NZS 3500.4 for precautions to be taken for installations in frost
prone areas. The water heater is not suitable for installation in areas where the ambient temperature falls
below -20°C (including wind chill factor).
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.
Relief valve setting 1000 kPa
Max. mains supply pressure 800 kPa
Min. mains supply pressure * 140 kPa
* minimum water supply pressure required to
achieve the rated flow and performance
Notes:
•
It is not recommended to install this water heater with a low pressure water supply.
•
A minimum water supply pressure of 140 kPa is required to achieve the rated flow and performance of
the water heater.
•
If this water heater is installed as an in-series gas booster for a solar water heater, the maximum water
supply pressure to the solar water heater, without an expansion control valve (ECV), is generally
800 kPa, however it may be less than this for some models. Refer to the Owner’s Guide and Installation
Instructions supplied with the solar water heater for maximum mains supply pressure details.
•
This water heater is not suitable for connection to bore water or spring water unless a water treatment
device is fitted.
•
Refer to “Water Supplies” on page 15 for further information on water chemistry.
PRESET OUTLET TEMPERATURE SETTING
The factory preset outlet temperature setting of the water heater is:
•
60°C as part of a Multipak system
•
50°C as part of a Multipak/50 system
It is usually not necessary to check or adjust the factory preset outlet temperature setting of the water heater,
unless the customer or application has a particular requirement for this to be done.
For applications requiring sanitising temperatures, such as a commercial kitchen, it will be necessary to
adjust the preset outlet temperature setting of the CFWH and the controller to achieve and maintain
sanitising temperatures up to 82°C. Refer to page 51 for details.
If the water heater is installed as part of a circulated hot water flow and return system in a building, the
preset outlet temperature setting must be set to at least 60°C. If the water temperature decreases by more
than 5°C through a circulated hot water flow and return system due to heat loss in the ring main, the preset
outlet temperature setting of the water heater should be set to at least 65°C.
GAS BOOSTER FOR A SOLAR WATER HEATER
Note:
AS 3498 requires that a water heater provides the means to inhibit the growth of Legionella bacteria in
potable water. When this water heater is used as an in-series booster for a solar water heater it can satisfy
this AS 3498 requirement provided it is energised and the booster preset outlet temperature setting is 70°C
or higher.