Boiler Components - Grant Combi 90 V3 User, Installation & Servicing Instructions

A Cold water inlet isolating valve
Main Components
C Lower pump union
D Upper pump union - isolating valve
E Heating check valve
I Thermostatic mixing valve
J Circulating pump
K Microswitch assembly
L Diverter valve
M Plate heat exchanger
P Flow restrictor
Q Heating flow isolating valve
R Heating return isolating valve
S Pressure switch
Outdoor Combi 90 V3, Combi Max and Condensing Combi

11 - BOILER COMPONENTS

Fig. 30 - Combi 90 V3 and Combi Max components/connections
1 Diverter valve - cold water inlet
Connections
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
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