Paloma PH-246CWHA, Руководство пользователя и инструкции по установке, Страница: 59 / 80

CONNECTIONS – PLUMBING
58
PIPE SIZES
The pipe sizing for hot water supply systems should be carried out by persons competent to do so,
choosing the most suitable pipe size to ensure adequate flow for each individual application.
Reference to the technical specifications of the water heater and local regulatory authority
requirements must be made.
To achieve true mains pressure operation, the cold water line to the water heater should be the
same size or bigger than the hot water line from the water heater.
The minimum recommended cold pipe or solar preheat pipe and hot pipe size is DN20.
IN-SERIES BOOSTER
The pipe work between the solar storage tank (if one is installed) and the in-series gas booster has a
minimum recommended pipe size of DN20,
MUST BE of copper and be fully insulated with a closed
cell type insulation or equivalent in accordance with the requirements of AS/NZS 3500.4.
The insulation must be weatherproof and UV resistant if exposed. The insulation must be fitted up to
the connections on both the solar storage tank and the in-series gas booster. A full flow isolation
valve must be installed on the water line to the in-series gas booster.
GAS INLET
The gas connection is made at the underside of the water heater. The pipe work must be cleared
of foreign matter before connection and purged before attempting to operate the water heater.
An isolation valve and disconnection union must be installed to allow servicing and removal of the
water heater (refer to the diagram on page 57).
Note: Refer to the Gas Installations Standard AS 5601 or AS/NZS 5601.1 for the correct method of
sizing the gas supply pipe to the water heater. The pipe size selection must take into account the
high gas input of this water heater (refer to table on page 53) as well as all of the other gas
appliances in the premises.
Warning: Always isolate the water heater before pressure testing the gas supply system.
Disconnect the water heater after the isolation valve to prevent the risk of serious damage to the
gas control. The Paloma warranty does not cover damage of any nature resulting from failure to
observe this precaution. Refer to rating label for gas types and pressures.