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Installation and Service Manual Upsilon-Series
53
13.3Maintenanceactivities
The following actions have to be taken in order to be able to carry out maintenance:
- Switch the device off using the mains switch,
- close the gas tap;
Refer to gure 13.3.a:
- Unscrew the 4 screws of quick-locks A, B, C and D
- Open the 4 quick-locks A, B, C and D and remove the housing (= air box) from the
front.
Dismantle the internal ue gas pipe as follows (refer to g. 13.3.b):
- Unplug the ue gas sensor if tted;
- Press the 2 clips of the siphon adapter (F) and push that part of the ue gas vent pipe
(E) down. Leave the siphon adapter (F) hanging on the bottom plate
- Slide the slider (G) in the upper part of the ue gas pipe upward.
- Pull the ue gas pipe (E) forward (both exchangers simultaneously).
Ventilationunitandburnercassette(refertog.13.3.candd)
- Remove the plug connections of the gas valve (1) and ventilator (2);
- Unscrew the coupling (3) of the gas unit;
- Replace the gas valve gasket with a new one;
- Unscrew the front cross-slotted screw (4) of the air suction damper (5);
- Loosen the left (9) and right (10) clamp bar a quarter of a turn and pull it out in a
forward direction. In doing so, pay attention to the turning direction (red check cams);
- Pull the complete ventilator unit and heat exchangers gas valve forward;
Removing housing gure 13.3.a
Removing ue pipe gure 13.3.b
F
G
E
gure 13.3.c
2
1
3
10
8
12
7
5
9
4
5
53


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A.O. Smith Upsilon UB-70 User Manual - English - 2 pages

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A.O. Smith Upsilon UB-70 Installation Guide - Dutch - 72 pages


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