Installation Manual
SYSTEM BOILER
– TA02A101.B1203
11
22 mm (min.)
DRAIN
COCK
LOCKSHIELD
BYPASS WITH
RETURN
VALVE
FLOW
22 mm VENT (min.)
COLD FEED
15 mm (MINIMUN)
FEED AND EXPANSION
CIRCULATING
PUMP
CISTERN
POINT
AIR RELEASE
HEIGH
T
450
mm MI
N.
VALVE
SER
VICE
COLD
MAIN
115
0 mm MI
N.
600
mm.
M
IN
.
OPEN (VENTED) WATER SYSTEM
Open vented water system
The appliance is suitable for open vented pumped systems, sealed systems where additional control protection is required.
The following conditions should be observed:
a)
The static head must not exceed 30 m (100ft) of water
b)
The boiler must be used with an indirect cylinder
c)
The boiler is fitted with a pump overrun thermostat and a 22 mm by-pass loop fitted with a lockshield valve must be fitted.
d)
Drain cocks should be fitted to system low points
e)
All gas and water pipes and wiring must be installed in a way which would not restrict servicing of the boiler.
f)
Position isolating valves close to circulating pump.
g)
System additives – where used, corrosion inhibitors and flushing agents / descalers should be suitable for all system metals. They
should be acceptable to British Gas and Water Council approved. Non acidity or alkalinity is desirable.
Pipework
The size of flow and return pipes from the boiler should be determined according to the requirements of the system.
It is recommended that the system is designed for an 11°C (20°F) drop in temperature across the system.
System Controls
For optimum operating conditions, it is recommended that a “y” plan or “s” plan control system be used incorporating a time switch or
programmer room thermostat and cylinder thermostat.
Where necessary a frost thermostat should be fitted to protect the boiler and if necessary the system.
Reference should be made to the control equipment manufacturer‟s literature for information e.g. wiring diagrams, etc.
Содержание RS 24 E 70/90
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