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®
B
AG I
LACKHEAT
NSTALLATION
SECTION 12: OPERATION
DANGER
Electrical Shock Hazard
Disconnect electric
before service.
Heater must be
connected to a properly
grounded electrical
source.
Failure to follow these instructions can result in death, electric shock, injury or property damage.
Figure 20: Sequence of Operation Chart
KEY TO
SYMBOLS
Thermostat
Fan
Pressure
P
Switch
Neon
Ignition
Gas
Valve
Flame
Sensing
Lockout Alarm
Signal (optional)
NOTE: If the heater operates for more than 24 hours continuously, the ignition module will automatically recycle the
burner to ensure that all safety functions are still in working 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 will
enable the ROBERTS GORDON
system, etc. to indicate precisely which heater has failed.
This can be done by two options.
12.1.1 Heater Lockout Indicator by Connector
A 230 V signal is provided which enables the ROBERTS
GORDON
®
controller, BMS system, etc. to indicate the
40
O
S
PERATION AND
ERVICE
Explosion Hazard
Turn off gas supply to
heater before service.
T0
T1
T2
P
Fan Neon
Burner Neon
Tp
10 sec
40 sec max.
11 sec typical
®
controller, BMS
M
ANUAL
WARNING
Burn Hazard
Allow heater to cool
before service.
Tubing may still be hot
after operation.
T3
T4
Interruption of main
heater that has failed. An additional wire has to be
installed from the heater lockout indicator connector to
the monitoring computer. See Page 39, Section 11.4.
Description
Connector male - Lockout Indicator
Connector female - Lockout Indicator
Wire Blue 12"
Wire Brown 12"
Cut/Pinch Hazard
Wear protective gear
during installation,
operation and service.
Edges are sharp.
T5
T6
T7
Tp
Ts
10 sec
10 sec
flame sensing
signal received after
Part Number
T8
Burner Lockout
3 ignition trial
failures
91324000
91324001
91300011
91300012
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Table of Contents
Troubleshooting
