Supplied By www.heating spares.co Tel. 0161 620 6677
3
INTRODUCTION
Fig.1 General Layout
1 Discharge valve
2 Gas valve
3 Modulator coil
4 Pressure switch
5 Condense trap
6 Ignition transformer
7 Expansion vessel
8 Electrode
9 Main burner
10 Main heat exchanger
11 Latent heat collector
12 Flue gas analysis test point
13 Flue outlet
14 Air intake
15 Differential pressure switch
16 Silicone pressure tube (-)
17 Silicone pressure tube (+)
18 Fan assembly
19 CH NTC sensor
20 High limit thermostat
21 Combustion chamber
22 Condensate pressure switch
23 Auto air vent (AAV)
24 Pump
25 DHW flow switch
26 DHW sensor
27 Domestic hot water heat exchanger
28 Diverter valve motor
29 Pressure gauge
30 DHW position
31 Mode selector switch
32 Fault indicator led
33 CH position
34 Timeclock
The PRO Combi HE range of appliances is comprised of
2 models of high-efficiency combination boiler with inputs
to heating & DHW of 25, 29 kW respectively. Each appli-
ance - by design - incorporates electronic ignition, circu-
lating pump, expansion vessel, safety valve, pressure
gauge and automatic by-pass.
The PRO Combi HE range is produced as room sealed,
category II2H3P appliances, suitable for internal wall
mounting applications only. They are provided with a fan
powered flue outlet with an annular coaxial combustion air
intake that can be rotated - horizontally - through 360
degrees for various horizontal or vertical applications. The
PRO Combi HE range is approved for use with C12 & C32
type flue applications.
These appliances are designed for use with a sealed
system only; consequently they are not intended for use
on open vented systems
Fig. 1
29 30 31 33
34
32
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