DORCHESTER DR-RS 105, Инструкция по установке, наладке и обслуживанию

Страница: 27 / 64

Gas connection
Instruction manual DR-RS 27
is
3.8 Gas connection
Warning
Gas installation may only be carried out by an authorised installer in
compliance with the general regulations imposed by the gas company.
Refer also to paragraph
1.3 Regulations and documents .
c Note
Make sure that the diameter and length of the gas supply pipe are large
enough to supply sufficient capacity to the water heater.
See
d
in Figure 3.3 .
1. Fit a gas valve
h
in the gas supply pipe.
2. Blow the gas pipe through before use, to be sure it is clean.
3. Close the gas valve.
4. Fit the gas supply pipe to the gas control.
Warning
Check for leaks after fitting.
3.9 Air supply and flue
gas discharge
Warning
The installation should be carried out by an authorised installer, in
compliance with the general and local regulations imposed by gas, water
supply and power supply companies and the fire service. Refer also to
paragraph
1.3 Regulations and documents .
3.9.1 Introduction
The connections for the air supply and the flue gas discharge of the DR-RS 25,
40 and 65 differ from those of the DR-RS 85 and 105.
3.9.2 Fitting flue gas discharge and air supply for DR-RS 25, 40, 65
The DR-RS water heaters are approved for installation types C
13
and C
33
.
This manual describes these installation types. If an explanation of other types
of installation is required, please contact Hamworthy.
c Note
Hamworthy prescribes the use of a roof or wall-mounted concentric terminal,
of a type approved for the water heater.
The following requirements must be fulfilled:
•
The maximum chimney length allowed (A+B+C) is 7 metres.
• The maximum number of 45° or 90° bends allowed is 2.
• If you make use of horizontal piping, then this must slope towards the water
heater with a minimum of 5 mm per metre running length!
• Make sure that the chimney discharges into an area where this is permitted
for this category of water heater.
See Figure 3.5 Wall flue terminal and Figure 3.6 Roof flue terminal for example
installations.