Technical information

Combi 70 & Combi 90 Oil Boilers
46
Fig. 39 - Combi 90 water components/connections
Major Components
A Cold water inlet isolating valve
B Primary return isolating valve
C Lower pump union
D Upper pump union - isolating valve
E Heating flow check valve
F Filling hose
G Filling loop - cold inlet isolating valve
H Filling loop - heating system isolating valve
I Thermostatic mixing valve
J Circulating pump
K Microswitch assembly
L Diverter valve
M Plate heat exchanger
N Not applicable
P Flow restrictor
Connections
1 Diverter valve - cold water inlet
2 Diverter valve - primary inlet
3 Diverter valve - primary outlet
4 Plate heat exchanger - hot water outlet
5 Cold water Inlet isolating valve - outlet
6 Plate heat exchanger - primary outlet
7 Plate heat exchanger - cold water inlet
8 Plate heat exchanger - primary inlet
9 Mixing valve - cold water inlet
10 Primary return isolating valve - inlet
11 Mixing valve - hot water inlet
12 Mixing valve - blended water outlet
13 Primary flow from boiler
9 - REPLACEMENT OF BOILER COMPONENTS