VOKERA Mynute i20, User Instructions

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22
Fig. 35
Fig. 37
6.16 MAIN HEAT EXCHANGER ( fi g. 35)
Carry out component removal procedure as described in 6.4.
Unclip and remove the three air chamber covers (front, LH, RH
sides). Disconnect all the wiring connections. Fig. 36: Slacken
the gas pipe (
L1
) at the air box connection and swing/rotate of
the fan assembly. Disconnect the fl ow (
M1
), return (
N1
) and
condense connections on the heat exchanger. Remove fan and
mixer as described in 6.14. Locate and remove the 2-screws
that secure the heat exchanger retaining clips and remove
clips (
O1
). Pull the heat exchanger forward and disconnect it
from the fl ue collector (
P1
). The heat exchanger can now be
withdrawn from the appliance.
Replace in the reverse order. Ensure all seals are in good
condition, taking care to ensure they are replaced correctly.
6.17 AUTOMATIC BY-PAS ( fi g. 36)
Carry out component removal procedure as described in 6.4.
Remove the locking pin (
Q1
) that secures the cover (
R1
) to
the hydraulic manifold. Using a hooked piece of wire, carefully
withdraw the by-pass cartridge (
S1
). Ensure all seals are in
good condition, taking care to ensure they are replaced cor-
rectly. Replace in the reverse order ensuring the cartridge is
facing the correct way.
6.18 EXPANSION VESSEL
Should the removal and replacement of the expansion vessel
be deemed impractical, an external expansion vessel may be
fi tted to the return pipe as close to the appliance as possible.
6.18.1 EXPANSION VESSEL REMOVAL
(with suf fi cient
clearance above, fi g. 37)
Carry out component removal procedure as described in 6.4.
Disconnect the fl ue from the appliance. Disconnect the expan-
sion vessel from the fl exible expansion pipe. Disconnect the
fl exible expansion pipe from the vessel. Unscrew the nut that
secures the vessel to the lower frame. Locate and remove the
6 screws
(U1)
that secure the vessel top holding plate
(V1)
,
remove the plate. The expansion vessel can now be removed.
Replace in the reverse order. Ensure all seals are in good
condition, taking care to ensure they are replaced correctly.
6.19 CONDENSE TRAP REMOVAL ( fi g. 38)
Carry out component removal procedure as described in 6.4.
Disconnect the 2 upper rubbers condense pipe
(W1)
. Remove
the pin
(X1)
that secures the trap to the air box plate. Discon-
nect the lower rubber condense pipe from the condense trap.
Carefully remove the condense trap. Remove the 2 screws
(Y1) and clean the condense trap.
Replace the component taking care the longer pipe on the
cover is positioned on the right side.
Disconnect the the locking pin (
Z1
) that secures the trap to
the air condense pipe. Disconnect the lower rubber condense
pipe from the condense trap. Carefully remove the condense
trap. For cleaning unlock the upper and lower closing plug (
J1
).
Replace in the reverse order.
U1
V1
Fig. 38
X1
Z1
J1
W1
Y1
L1
M1
N1
O1
P1
Fig. 36
Q1
S1
R1