Basic Hydraulic Patterns; Direct Heating Circuit - Dimplex ASCARI MA 12 Installation And Servicing Instructions

Commissioning & Testing
WATER TREATMENT, CLEANSING AND FLUSHING THE HEATING SYSTEM
NOTE : Bristish Standard BS7593 : 1992 stresses the importance of cleansing and flushing of the system to
ensure it continues to run efficiently with the minimum of maintenance necessary. Dimplex fully support this
professional approach and recommend that the system is cleased with an effective chemical cleanser and
protected long term with a suitable inhibitor. Such products are available from Fernox and Sentinal.
• Check the pressure of the expansion vessel, this should be factory set to 1 bar (0.1MPa)
• The heating system should be filled using the approved installed filling loop.
Ensure all radiator valves are open. The initial system pressure when cold should be between 1.0 (0.1MPa)
and 1.5 bar (0.15MPa)
• Once filled check the system for leaks
• Open the drain cock and drain the system fully

4.1 - Direct heating circuit

4
1
2
electric boiler
1
2
3
4
5
6
D
R
Rm
Rt
TA
SExt :

4 - BASIC HYDRAULIC PATTERNS

5
5
4
D R
3
6
: 3 speed pump
: 8 liters expansion vessel
: 3 bar safety relief
: Stopcocks
: Automatic air bleeders
: Pressure sensor
: Heating outlet 1" female
: Heating inlet 1" female
: Handcock (room housint the ambience thermostat TA)
: Thermostatic cock
: Ambience thermostat with or without timer
Outside temperature sensor
Ascari - 12kW -page 21 -
TA
Rt
Rm
Radiators
OR
Underfloor heating
Decoding :
1 2 3 4
1 2 3 4
1 2 3 4
1 2 3 4
SExt