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5.1.1 Operating data
5.1.2 Function schematic and Description
Please note: all diagrams are indicative in nature and do not claim to be complete
The system comprises of a heat exchanger (1) and a Pressure Temperature (PT) control valve
(2) which controls
the operation and temperature of the DHW system.
In the stand-by mode the heating primary water is kept at operating temperature via a thermostatic circulation
bypass valve (5). When a hot tap is opened, the PT controller (1) reacts to the difference in pressure and opens
the cold water inlet to the heat exchanger allowing hot water to flow through to the tap. The temperature of the
hot water that exits the heat exchanger (1) is controlled by the thermostatic head (3) which regulates the PT
controller (2).
Description
Data
Height
490mm (with ball valve cover 600mm)
Height with heat meter display
737mm
Width
400mm
Depth
160mm
Total unit weight
13.7kg
Total unit weight with cover
17.7kg (with ball valve cover 18.8kg)
Maximum DHW output
55kW (20 l/min) 42kW (15 l/min)
Maximum primary supply temperature
90°C
Maximum DHW temperature
55°C
Minimum DP
30kPa
Maximum working pressure primary side
10 bar
Maximum working pressure DHW side
10 bar
Ball valve connections
22mm compression (15mm adapter available)
No
Description
1
DHW heat exchanger - Stainless Steel brazed
2
Pressure temperature control valve
3
Thermostatic head with contact sensor
4
Primary strainer 0.5mm mesh
5
Primary thermostatic circulation bypass valve
6
Differential pressure control valve
7
Optional heat meter
8
Optional water meter
9
Drain and vent valves
10
Isolation and drain ball valves with test points
11
Isolation and drain ball valves
Primary F&R
MCW
DHW
