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Page 14
SECTION 3.
Operation
3.1 Controls - General
See Figure 15 for control locations.
3.1.1
Electronic Ignition Controls:
a.
Intermittent Ignition:
Pilots are automatically lit when the
operating aquastat calls for heat (System
#9).
The unit performs its own safety check and
opens the main valves only after the pilot is
proven to be lit. Whenever the pilot flame
is interrupted, the main gas valve closes
within 0.8 seconds.
b.
Electronically Supervised Standing Pilot
System (System #16):
When pilot flame fails, the ignition control
module responds in less than 0.8 seconds
and provides 100% safety shutdown.
3.1.2
Operating Controls:
Electrically Operating Controls:
Copper Brute units are equipped with operating
temperature. The temperature sensing bulb is
located in the heater inlet.
Manual
Pilot
Valve
Manual
Main Gas
Valve
Safety
Gas
Valve
Figure 15. Control Components.
3.2 Initial Start-Up
that the heater is filled with water and all air is purged
from the system. Once the heater is connected to the
gas supply, the automatic safety shutoff devices must
be checked.
1.
Rating Plate
Ignition Control
Operating
Gas Valve
3.1.3
High Limit Controls:
The manual reset high limit switches are
provided as standard equipment on all heaters.
Automatic reset switches are optionally provided.
The temperature sensing bulb of the switch is
always located in the heater outlet. Burners will
automatically shut down whenever overheating
of water occurs.
3.1.4
Flow Switch:
Standard on all models, the switch is mounted
directly in the header outlet. The flow switch
shuts down all burners in case of low water
condition or pump failure.
3.1.5
Low Water Cut Off: (Optional)
The low water cut off automatically shuts off the
heater whenever the water level drops below the
probe. The probe is located at the heater inlet.
Before placing the heater in operation, be certain
Before beginning the tests, make sure the main
manual gas valve, and any other heater firing
valves are in the "OFF" position.
Flow Switch
Pressure Relief
Valve
In
Out
Transformer
Terminal Strip
Operating Control
(Aquastat)
Hi-Limit
BRADFORD WHITE
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