B
LACKHEAT
®
AG I
NSTALLATION
O
PERATION
AND
S
ERVICE
M
ANUAL
40
SECTION 12: OPERATION
Fi
g
ure 20: Se
q
uence of Operation Chart
NOTE: If the heater operates for more than 24 hours continuously, the ignition module
w
ill automatically recycle the
burner to ensure that all safety functions are still in
w
orking condition.
12.1 Heater Lockout Indication (Optional)
In case of flame loss during operation of the heater, the
burner control unit goes to lockout mode after three
ignition trials. At this stage a signal or closed relay
w
ill
enable the ROBERTS GORDON
®
controller, BMS
system, etc. to indicate precisely
w
hich heater has failed.
This can be done by t
w
o options.
12.1.1 Heater Lockout Indicator by Connector
A 230 V signal is pro
v
ided
w
hich enables the ROBERTS
GORDON
®
controller, BMS system, etc. to indicate the
heater that has failed. An additional
w
ire has to be
installed from the heater lockout indicator connector to
the monitoring computer.
See Page 39, Section 11.4
.
Cut/Pinch Hazard
Wear protective gear
during installation,
operation and service.
Edges are sharp.
WARNING
Failure to follow these instructions can result in death, electric shock, injury or property damage.
Burn Hazard
Allow heater to cool
before service.
Tubing may still be hot
after operation.
Explosion Hazard
Turn off gas supply to
heater before service.
DANGER
Electrical Shock Hazard
Disconnect electric
before service.
Heater must be
connected to a properly
grounded electrical
source.
P
P
Fan
N
eon
B
u
rner
N
eon
N
eon
Ignition
Gas
V
alve
Flame
Sensing
Press
u
re
Switch
Fan
Thermostat
KEY TO
SYMBOLS
T0
T1
T2
T3
T4
T5
T6
T7
10 sec
Tp
40 sec max.
Interr
u
ption of main
Tp
10 sec
Ts
10 sec
flame sensing
11 sec typical
T
8
Locko
u
t Alarm
Signal (optional)
B
u
rner Locko
u
t
signal received after
3 ignition trial
fail
u
res
Description
Part Number
Connector male - Lockout Indicator
91324000
Connector female - Lockout Indicator
91324001
Wire Blue 12"
91300011
Wire Bro
w
n 12"
91300012
Summary of Contents for AG15ST
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Page 45: ...SECTION 11 WIRING 39 11 4 Internal Wiring Diagram ...
Page 53: ...SECTION 14 TROUBLESHOOTING 47 Troubleshooting Flow Chart Linear and Double Linear ...
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