23
Key to figures 4-2:
1 - Air inlet
2 - Flue exhaust
3 - P-T Safety relief valve
4 - P-T gauge
5 - Sealing chamber
6 - High limit supply temperature switch
7 - Supply temperature sensor
8 - CRV Stainless steel heat exchanger
9 - Water pressure sensor
10 - Flue gas temperature sensor
11 - High limit flue gas temperature fuse
12 - Blocked flue pressure switch
13 - Ignition electrodes
14 - Premix burner
15 - Detection electrode
16 - ignitor
17 - Return temperature sensor
18 - Back flue preventer
19 - Modulating PWM fan
20 - Gas valve
22 - Water flow meter
23 - Condensing blocked drain switch
24 - Condensate Siphon
25 - Condensate neutralizer box
26 - Gas inlet
27 - Condensate drain
29 - Electronic anode
30 - Stainless steel storage tank
31 - Hot water supply
32 - DHW Circulator pump
33 - Tank sensor
34 - Cold water inlet
35 - Drain valve
36 - Primary heat exchanger temperature fuse
Figure 4-2 - Hydronic functional schematic for models 399 and 500
4 - FUNCTION OVERVIEW
Summary of Contents for Esteem 399
Page 3: ...3 SAFETY INSTRUCTIONS ...
Page 5: ...5 SAFETY INSTRUCTIONS ...
Page 112: ...112 17 MAINTENANCE ...
Page 116: ...116 19 SPARE PARTS Spare parts ...
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