Airwell PAC HT 12-6, Engineering Data Manual

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3
1
1
1
3
1
5
6
10
7
8
9
4
14
13
15
11
1
12
1
1
1 1
1 1
1
1
HW
CW
8
General Hydraulic Layout for a Type 3 (*) Installation
Layout 3 :
This layout is also recommended for heating installations with wide operating water flow variations (radiator thermostatic valves present in the system). Minimum
system volume is guaranteed by a mixing tank
(10) . Take care when calculating the volume of water in the installation and only take account of 50% of the mixing
tank's volume.
Example : For a useful volume of 100 litres the actual mixing tank volume will be 200 litres.
The flow adjustment valve (11) is used to balance the flow in heating mode and domestic hot water mode to always ensure optimum PAC HT operation.
1 Stop valve 11 Flow regulating valve
3 Filter or sludge trap 12 Expansion tank
4 Relief valve 13 In-line heater
5 3-way valve - Domestic hot water 14 Bleed
6 Domestic hot water tank 15 Safety valve
7 Safety devices HW : Hot Water
8 Recycling circulating pump (optional) CW : Cold Water
9 Circulation pump * Installation components not supplied
10 Mixing tank