Rinnai E75CN Installation & Servicing Instructions Manual page 67

9
7
8
Siphon figure 35
13
14
12
11
Condensate tray figure 36
!
DANGER
Clamping rods figure 37
!
DANGER
!
WARNING
Condensate trap and condensate tray (fi gure 35-37) (2 and 4 year maintenance)
Step 1: Condensate trap
- First remove the screw (7);
- Pull the condensation cup (8) downwards, out of the condensate tray (14)
Check this for impurities. If there is not a lot of impurities it is not necessary to
clean the condensate tray (Go to Step 3). If there is a lot of impurities in the cup
it is necessary to remove and clean the condensate tray according Step 2;
- Check the O-ring (9) of the cup and replace if necessary;
- Clean the parts by fl ushing it with clean water;
- Grease the O-ring again with acid free O-ring grease to make fi tting easier;
- If there is a leak at the condensate trap (8) replace complete condensate trap by
# 809000100;
Step 2: Condensate tray
- Remove the plug from the fl ue gas sensor if present;
- Turn the two short clamping rods (11 and 12) ¼ turn and remove them by pulling
them forward; Note the right turning direction (red indicator);
- Lift the exhaust pipe (13) out of the condensate tray (14);
- Press the condensate tray (14) carefully downwards and remove it by pulling it
forward;
- Replace the gasket between condensate tray and heat exchanger by a new one;
- Clean the condensate tray with water and a hard brush;
- Check the condensate tray on leaks.
Step 3: Refi tting is done in reverse order.
Note that all gaskets seals completely.
Make sure that during refi tting the clamping rods they are put in the right
position. They should be turned vertical.
If the boiler should activated with clamping rods in the wrong position it will
cause serious property damage, personal injury or loss of life.
Put the boiler into operation and check the O
If replacement by new gaskets and burner mentioned in this chapter is not done
within the service interval subscribed by Rinnai the boiler can be damaged and
will cause serious property damage, personal injury or loss of life.
Use only original spare parts supplied by Rinnai. If other parts will be used
the boiler can be damaged and will cause serious property damage, personal
injury or loss of life. Use of non-Rinnai parts will result in the void of warranty.
Cleaning the Brazed Plate Heat exchanger (Every 2 year maintenance or as
needed based on water quality)
The brazed plate heat exchanger should be cleaned at the service interval every 2
years. Failure to fl ush the brazed plate heat exchanger will cause damage to it. Follow
the procedure below for cleaning the brazed plate heat exchanger.
1. Turn off the DHW function on the boiler.
2. Close the shutoff valves on both the hot water and cold water lines (V3 and V4).
3. Connect pump outlet hose (H1) to the hot water line at service valve (V1).
4. Connect drain hose (H3) to service valve (V2).
5. Pour approximately 4 gallons of virgin, food grade, white vinegar or citric acid into
pail.
(see chapter 12.4).
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