Specifications

SARIgas Zoom Z – ZF Page 17
Rev.0
HEATING ALTERNATIVELY, A FUSED DOBLLE POLE PIPING SYSTEM
- The section of the piping depends on the methods currently used, using the curve given in the diagram (Figs. 21-22).
We recommend using a capacity that keeps the temperature difference between delivery and return from the heating
system between 41°F and 50°F.
Available head and capacities for heating systems at
the boiler fittings
Diagram of pressure drops of the sanitary water
circuit to the boiler fittings
Fig.21 Fig.22
HEATING ELEMENTS
- Radiators, convectors or fancoil heaters can all be used.
- The maximum temperature of the boiler grants calculating the exchange surface for a temperature of 176°F.
however we recommend calculating the exchange area by taking a lower temperature as reference value, thus
allowing to improve comfort and reduce energy consumption.
- The radiators must be fitted with adjustable input connectors, which allow balancing the system, and manual
bleeders on the top points.
CONNECTING THE GAS PIPES
The section of the pipes, between the metre and the boiler, must be of a size to reach the supply pressure given on
the label. It must be possible to close the piping if the boiler is dismantled, by fixing an interception valve between the
boiler and the gas pipe. For installation and the materials to be used, refer to local legislation. Ensure that the boiler is
compatible with the gas supplied.
ELECTRICITY SUPPLY
The electric supply wire to the boiler must be fuse the supply at 3 A unswitched schuttered socket outlet to the
requirements of BS 1363 switch, which guarantees complete disconnection of the supply, with contacts having an
opening of at least 1/8 in. Connect to a power supply of 230  Volt 50 Hz, respecting the phase "L" and neutral "N".
Consult the relative wiring diagram on page 19, Fig. 25.
- The earth wire must be connected to the earth terminal marked by the symbol .
A multiple PVC wire type H05 VV-F or H05 VVH2-F, must be used for the electricity supply wire, with a section of 3 x
0,75 mm
2
, and the earth wire to the boiler must be longer than the supply wires.
N.B. If the correct polarity is not respected, the boiler will halt and the block alarm will come on (lighted button E, Fig.
1). If there is minimum electric voltage (5 -10 V), between Neutral and Earth the boiler will not work correctly.