Installation manual

INSTALLATION SECTION 3
SOLAR PIPE WORK
IMPORTANT:
Due to the potentially high temperatures in the solar circuit, suitable materials should always
be used. Soft solder should not be used with copper, the pipe-work should be preferably
brazed or compression fittings used. The number of joins should be limited.
As the heat transfer fluid in the solar circuit contains a water/glycol mix it is recommended
that the discharges of relief valves are not put to drain. The relief valve connection (located in
on the pump station) should be connected back into the original fluid container (located o the
back of the solar station).SEE SOLAR STATION. This is to prevent loss of the fluid to drain.
All fittings are best placed on the return line from to the solar coil to the collectors. This
ensures equipment is only exposed to the cooler temperatures within the circuit.
STAINLESS STEEL FLEXIBLE PIPE:
The stainless steel flexible pre-insulated pipe is available in sizes DN20, DN25 and DN32.
This pipe is pre-insulated and is supplied with electrical wire for connecting the
collector sensor to the solar control unit already intergrated.
9
DHW
CONNECTIONS A,B,C
Please refer to the individual equipment and relevant standards for full requirements of
connection.
All pipe-work must be suitable for potable water, this would be generally copper, a suitable
grade of stainless steel, or plastic.
PIPEWORK
T
he equipment supplied by Andrews Water Heaters is designed to be easy to install due to
its module supply. The interconnecting pipe-work is schematically shown in Fig 2.
SOLAR COLLECTOR
PANELS
SECONDARY RETURN
P
UMP
NON-RETURN
VALVE
NON-RETURN
VALVE
HOT WATER
OUTLETS
FLOW
FLOW
MAXXFLO
WATER HEATER
PRE-HEAT
SOLAR VESSEL
ANTI-LEGIONELLA
CIRCUIT & PUMP
(TIMED)
S
OLAR
EXPANSION
VESSEL
COMMISSION
&
FILLING
VALVE
HI-LIMIT STAT
TEMPERATURE /
PRESSURE RELIEF
VALVE
7 BAR / 95ºC
DRAIN
COCK
EXPANSION
VESSEL
EXPANSION RELIEF
V
ALVE 6 BAR
NON-RETURN
VALVE
PRESSURE
LIMITING & LINE
STRAINER VALVE
3½ BAR
COLD WATER
SUPPLY
STOP
COCK
D
SOLAR PUMP
STATION
SOLAR CONTROL PANEL
COLLECTOR
SENSOR
S
OLAR COLLECTOR
PANELS
HOT WATER
OUTLETS
FLOW
H
EATING
BOILER
LOW LOSS
HEADER
TWIN COIL
VESSEL
S
OLAR
EXPANSION
V
ESSEL
C
OMMISSION
& FILLING
V
ALVE
H
I-LIMIT STAT
TEMPERATURE /
PRESSURE RELIEF
VALVE
7 BAR / 95ºC
D
RAIN
COCK
EXPANSION
VESSEL
EXPANSION RELIEF
VALVE 6 BAR
NON-RETURN
VALVE
PRESSURE
LIMITING & LINE
STRAINER VALVE
3½ BAR
COLD WATER
SUPPLY
STOP
COCK
D
SECONDARY RETURN
PUMP
NON-RETURN
VALVE
SOLAR PUMP
STATION
SOLAR CONTROL PANEL
COLLECTOR
SENSOR
A
A
B
B
C
C
Fig.2
D
D
EE