FULTON VSRT 50 - Safety Controls and Testing

OPERATION  3
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VSRT_IOM_2018-1213
2. Use the / to change the output from 0.0 to
100.0
3. To return to Automatic Mode, press the “A/M” key
again and the red light will turn o.
FLAME PROGRAMMER
Refer to cut sheets for provided ame programmer.
AIR SAFETY SWITCH
To test, perform the following:
1. Disconnect power to boiler.
2. Remove air supply from the air switch, and turn
on the boiler.
3. Once the boiler is in the purge process, the safety
interlock should appear and shut down the
burner.
4. Turn the burner o and reattach the air switch air
supply.
5. Reset the ame programmer.
6. Set the Air Switch:
 While the boiler is running on the lowest
modulation rate (usually 0% low re), adjust air
switch clockwise to raise the setpoint pressure and
counter-clockwise to lower the setpoint pressure.
 Adjust clockwise until switch trips and locks boiler
out on air pressure.
 The air switch should be turned counter clockwise
from the desired set point 1-2 full turns.
 Cycle the boiler multiple times to be sure that no
nuisance fault occurs.
BLOWER MOTOR STARTER
For units equipped with manual trip test button or
motor starter:
1. With the boiler running, actuate the manual trip
button on blower motor starter. Unit should
lock out. Attempt re-start by resetting the ame
programmer. Purge cycle will not begin.
2. Reset motor starter; blower should start and
purge cycle will begin.
PUMP MOTOR STARTER
If a pump starter is supplied, the pump motor starter
will be located in the boiler/heater panel or pump skid.
When the pump start button is pushed, the pump
motor starter will engage the pump.
1. While ring, actuate the manual trip button on
the pump motor starter. Pump and burner will
shut down. The blower should continue to run
for approximately 30 seconds.
2. Attempt to restart pump by depressing the
pump start push button. The pump should not
start.
3. Reset starter and start pump.
LOW WATER CUTOFF
Each cuto device shall be installed to prevent
startup, and to cut o the boiler fuel or energy supply
automatically, prior to the fall of the water level below
the lowest visible level of the gauge glass. Standard low
water cuto devices are Fulton level probes. Alternate
cuto devices are MM-150, MM-157, MM-193-7b. Fulton
probe type low water cuto devices have a built in 3
second time delay feature. Float type low water cuto
controllers have a 30-second delay. Test as follows:
PRIMARY LOW WATER CUTOFF
This is the rst low water safety cut-o, typically an
automatic reset safety. Some local jurisdictions require
this safety control to be a manual reset.
To test this safety:
1. Slowly drain the boiler, open the blowdown
valves while boiler is operating, and make sure
that when the safety switch trips, the boiler is
shut down. Close the blowdown valves.
2. Once water level is above the cut-o point, the
burner will automatically turn back on.
SECONDARY LOW WATER CUTOFF
This is always a manual reset safety.
To test this safety:
1. Slowly drain to the secondary cut-o level. This
must be above the bottom of the lowest visible