9
Fig. 13
Fig. 15
Fig. 16
Fig. 17
Fig. 18
Fig. 14
S
Se
errv
viicciin
ng
g iin
nssttrru
uccttiio
on
nss
1
11
1)) G
GA
AS
S A
AN
ND
D W
WA
AT
TE
ER
R F
FIIL
LT
TE
ER
RS
S
Gas and water inlet are fitted
between the inlet taps and the
heater.
To clean, turn off the taps, unscrew
the union nuts attaching the taps to
the heater, and remove the filters.
Clean the filters by blowing or wash-
ing in water. DO NOT use any sol-
vents.
Replace ensuring that the coarse fil-
ter is fitted in the water inlet and the
fine filter in the gas inlet.
1
12
2)) P
PIIE
EZ
ZO
O C
CA
AR
RT
TR
RIID
DG
GE
E
Pull off the electrode from the piezo
cartridge.
Remove the screw holding the gas
control cam and remove the cam (P
- fig. 15).
Remove the two screws (Q - fig. 15)
holding the retaining plate.
Remove the piezo cartridge and
replace if necessary.
1
13
3)) H
HE
EA
AT
T IIN
NP
PU
UT
T
The heat input is pre-set and non-
adjustable. The heat input and burn-
er pressure should be checked
against Table 1.
If the heat input/burner pressure is
not correct, check the working pres-
sure at the pressure test point on
the gas service tap. This should be
20 mbar (8 ins w.g.).
The gas installation should be
examined for any possible blockage
if the pressure is incorrect.
1
14
4)) W
WA
AT
TE
ER
R S
SE
EC
CT
TIIO
ON
N V
VE
EN
NT
TU
UR
RII
Drain the heater as in Section 3.
Disconnect the right hand heating
body leg at the water section and
remove the venturi.
Clean or replace as necessary and
re-assemble in reverse order.
1
15
5)) S
SL
LO
OW
W IIG
GN
NIIT
TIIO
ON
N D
DE
EV
VIIC
CE
E
Burner ignition should be smooth
and quiet. Incorrect adjustment of
the slow ignition screw can cause
explosive ignition or ignition at all.
To adjust the slow ignition device
firstly tighten screw (S - fig. 14) fully
then unscrew 1/4 turn at a time until
the appliance ignites smoothly.
Note : Turning the screw (S) clock-
wise delays ignition.
1
16
6)) G
GA
AS
S C
CO
ON
NV
VE
ER
RS
SIIO
ON
N
F
Frro
om
m n
na
attu
urra
all g
ga
ass tto
o b
bu
utta
an
n--p
prro
op
pa
an
n a
an
nd
d
v
viicce
e--v
ve
errssa
a
(fig. 16, 17, 18).
- Turn off gas at the gas service cock and
remove the front casing (see section 1,
front casing, p. 7).
- Unscrew the pilot tube clamping screw
(52) and remove pilot tube (8).
- Remove the burner manifold (7) by
unscrewing the four screws (53).
- Disconnect at thermo-electric valve by
undoing nut (54) and pull off the elec-
trode cable (55).
- Unscrew the two screws (56) and pull
burner forward to remove.
- Unscrew the four screws (57) and lift
the gas section top off the base.
- Unscrew the complete valve box (58).
- Replace the new complete valve box
fitted inside with a spring and the gas
valve (factory assembled).
- Replace the gas section top on the
base and screw the four screws (57).
- Replace the burner and screw the 2
screws (56).
- Re-assemble the thermo-couple nut
(54) and electrode cable (55).
- Change the pilot gasket (61) change
the pilot injector.
- Replace the new burner manifold with
the appropriate injectors and the man-
ifold restrictor (if planned).
Fasten the four screws (53).
- Replace the pilot tube (8) conform with
the new used gas and gently tighten
the screw (52).
56
57
54
55
M
S
O
P
Q
61
53
7
52
58
