AERCO BMK 6000 Dual Fuel - Manual (Page 90)

Benchmark 6000 DF Installation, Operation & Maintenance Manual
CHAPTER 6 – SAFETY DEVICE TESTING
Page 90 of 219 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0096_0B
03/21/2014
Ph.: 800-526-0288
GF-141
Blower Proof Switch – Continued
8. Go to the Configuration Menu, Analog Output item and select VALVE POSITION 0-10v.
6.8.2 Blocked Inlet Switch Test
This test will be run in simulated fire mode, with the Blocked Inlet Switch isolated from the rest of
the control circuitry.
Blocked Inlet Switch Test
1. Turn off the main ON/OFF switch on the front of the Control Panel.
2. For units that get combustion air from a Combustion Air Duct, remove that duct, located
directly above the boiler (see Figure 6.6, below). For units that have an air filter in place of
a Combustion Air Duct (not shown), Remove the three (3) hex head screws securing the Y-
Duct and air filters to the Air/Fuel valve and carefully remove the Y-Duct and air filter
assembly.
WARNING
THE BLOWER SUCTION IS VERY STRONG AND CAN PULL NEARBY
OBJECTS INTO THE BLOWER’S FAN BLADES. DO ALLOW ANYTHING
TO BE PULLED INTO THE BLOWER. DO NOT WEAR ANYTHING THAT
COULD GET CAUGHT AND PULL YOU INTO THE BLOWER.
3. Turn off the gas supply ball valve to the boiler and then complete the following steps:
a) Use jumper wires to jump out the Low Gas Pressure Switch and the Blower Proof
Switch.
b) Remove the black connector boot from the Flame Detector.
c) Connect the Flame Signal Generator to the black connector boot.
Figure 6.5a: Connecting the Flame Signal Generator
d) Keep the alligator clip away from bare metal parts until step 4c.
4. Complete the following with the boiler operating in Manual mode:
a) Ramp the boiler up to 100% fire rate and then turn on the main ON/OFF switch on the
front of the Control Panel.
b) Push the BACK button three (3) times to return to the upper level menu.
c) When the Controller gets into the ignition phase, the Control Panel will show IGNITION
TRIAL. At that point attach the alligator clip (see Figure 6.5a) to any bare metal surface
or ground. The C-More display should now show FLAME PROVEN and begin to ramp
up to 100% fire rate. Note that no gas or flame is present in the boiler at this time.
5. Wait for the boiler to ramp up to at least 90% before continuing.
TO WIRE HARNESS
FLAME DETECTOR
CONNECTOR BOOT
FLAME SIGNAL GENERATOR