31
INSTALLATION
isar + programmer -
Installation and Servicing
nm84
30
time
P R O G R A M M E R
prog
prog
select
select
+
-
B
T
S
K
H
E
D
G
J
L
M
N
Q
F
R
P
C
38 INITIAL LIGHTING
1.
Check that the system has been filled and that the boiler is
not airlocked. Ensure the automatic air vent cap (K) is open.
Note.
It is important the burner is not operated before the system is
fully vented of air. If it is necessary to operate the appliance
pump to assist venting of the air this must be done with the
gas service cock turned off.
2.
Refit the boiler sealing panel. Refer to Frame 45.
3.
Check that all the drain cocks are closed and that the CH
and DHW isolating valves (P, R and N) are OPEN.
4.
Check that the electrical supply is OFF.
5.
Check that the boiler on/off switch (A) is off.
6.
Carefully align the user control and push gently into place.
Secure with the single screw located underneath.
7.
Check that the gas service cock (F) is OPEN.
8.
Slacken the screw in the inlet pressure test point (E) and
connect a gas pressure gauge via a flexible tube.
9.
Swing the control box to the working position and secure
with the clamp.
10. Connect
the low voltage electrical lead from the user control
to the control box (refer to Frame 46).
11.
Screw the control into position.
12.
Switch the electricity supply ON and check all external controls
are calling for heat.
13. CENTRAL HEATING
Switch the boiler on/off switch (A) to ON. The boiler control
should now go through its ignition sequence until the burner
is established.
LEGEND
A.
Boiler On/Off switch
B.
LED display
C.
Select (reset) button
D.
Injector pressure test point
E.
Inlet pressure test point
F.
Gas service cock
G.
Casing pressure test point
H.
Overheat thermostat
J.
Control thermistor (flow)
K.
Automatic air vent
L.
Control box (Servicing
position)
M.
Pressure gauge
N.
CH Flow isolating valve
P.
CH Return isolating valve
Q.
DHW outlet
R.
DHW inlet
S.
Spark generator
T.
Condensate drain
14.
If the boiler does not light after 3 attempts the fault code
“LF” will be displayed, Press the select button (C) and
the boiler will repeat its ignition sequence.
When the burner is established the flame 'Burner On'
indicator will be illuminated, the LED display will show
the radiator status symbol.
The itime programmer display
The LCD display has a number of indicators to show the
operation of the boiler. In stand-by mode there are no
additional indicators other than the time of day. Each channel,
CH and DHW, status is shown as OFF, ON, TIMED or
ADVANCE (see users guide). In a timed on period the status
of the boiler is:
Radiator symbol indicats CH demand.
Tap symbol indicates DHW or preheat demand.
Flame symbol indicates burner status.
In error conditions the following indicates the error:
Blocking error is proceeded by “H” on the LCD display.
Locking out error is proceeded by a “L” on the LCD display.
INST
ALLA
TION
202851-1new.pmd
17/11/2006, 07:40
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