IDEAL VANGUARD L 170 Installation And Servicing page 26

28 WIRING HARNESS
The Burner control circuit may be fitted with 1 or 2 standard
European connector-plugs (as supplied) and can be fitted
directly to the burners fitted with connector-sockets. In the case
of a burner not fitted with sockets, connect the leads to the
terminal bar on the burner, proceeding as follows:
No (9) [1] Control circuit live interrupted in panel by Safety
Thermostat TS and panel ON/OFF
IG. Connect to the control circuit live terminal of
burner.
Note.
The connector terminal for this control phase
must be separate from those of the power supply
phase(s) which are wired directly to the burner via
the installer supplied burner mains relay.
No (8) [N] Neutral from control panel interrupted by panel
ON/OFF switch. Connect to Neutral terminal of
burner control box.
No (7) T1 Live feed from burner control circuit downstream
of burner ON/OFF switch. Connect to live side of
first stage control thermostat (High temperature
setting).
No (6) T2 Return from 1st stage control thermostat (High
temperature setting). Live on this lead, hence on
T2 allows burner to fire on low fire in a 2 stage
burner.
29 HEATING PumP oVERRuN
The heating pump overrun is controlled by the minimum temperature thermostat.
30 fuEL oIL oR GAS coNNEcTIoNS
Refer to the instructions supplied with the burner.
26
INSTALLATIoN
switch
No. printed
on cable
No (10) S3 Burner lockout indicator. Feeds signal from lockout
terminal on burner control box to a remote lock out
indicator.
No (4) B4 Feed to 1st stage operating indicator from burner
low fire control. Indicates low fire in operation.
Essentially feed back from live on No (6) T2.
No (2) T6 Live feed from burner control circuit downstream
of burner ON/OFF switch. Connects to live side
of 2nd stage control thermostat (low setting
thermostat).
No (3) T8 Return from 2nd stage control thermostat (low
temperature setting). Live on this lead, hence on
T8 allows burner to fire on high fire in a 2 stage
burner.
No (5) T7 Back contact from 2nd stage control thermostat
(low temperature setting). Live on this lead, hence
T7 indicates high fire out of operation (used for
modulating burners only).
No (1) B5 Feed to 2nd stage operating indicator from burner
high fire control to boiler panel. Indicates high fire
in operation. Essentially feed back from live on No
(3) T8.
g/y Earth
van 5724
Vanguard L -
Installation & Servicing