31
Installation and Servicing
SECTION 3 - SERVICING
3.3 KEY COMPONENTS - DIRECT
Note: Greyed out parts
listed on this key are not
applicable to the Direct HIU
model.
1.
PHEX Assembly DHW
2.
PHEX Assembly CH
3.
Expansion Vessel
4.
Thermistor 18mm CH
Return
5.
Thermistor 18mm CH
Primary Flow
6.
Waterset CH
7.
Manifold Primary Flow
Assembly
8.
Manifold Primary Return
Assembly
9.
Manifold DHW Flow
Assembly
10.
Manifold DCW Assembly
11.
PICV DN20
12.
PICV DN15
13.
Air Vent DCW
14.
Air Vent Primary
15.
Air Vent CH
16.
PRV
17.
Auto Air Vent
18.
Pump Head
19.
Pressure Switch
20.
Pressure Test Point
21.
Primary Return
Thermistor
22.
Pressure Test Point
23.
Thermistor DHW
24.
Mini Expansion vessel
25.
Drain Point DCW
26.
Flow Turbine Sensor and
Clip
14
1
13
12
11
26
25
23
24
22
21
8
7
9
10
20
5
4
15
SER
VICING
