Navien LCB700-21RS Installation & Operation Manual page 74

Model
"Kerosene" "ES"
UK Standard Pattern
Heating Oil Oil Nozzle
"Light Oil" "S"
EU Standard Pattern
Heating Oil Oil Nozzle
Checking the Ignition Ground Wiring
1. Check that the ground wire is in good condition and
securely attached to the boiler casing.
2. Check ground continuity of wiring using a continuity tester.
3. Replace ground wires if ground continuity is not satisfactory.
Checking all Boiler Wiring
Inspect all boiler wiring, making sure wires are in good condition
and securely attached.
Checking the Control Settings
Check settings of external limit controls (if any) and adjust if
necessary.
Performing Start-up and Checks
1. Start boiler and make sure that the boiler is operating
properly.
2. Verify cold fill pressure is correct and that operating pressure
does not go too high.
74 Maintaining the Boiler
Oil Nozzle
Low
Oil
Pressure
High
Oil Nozzle
Low
Oil
Pressure
High
21RS/RSX 28RS/RSX
21LS/LSX 28LS/LSX
0.55G 80˚ ES 0.75G 80˚ ES
6.5 bar
11.5 bar
0.45G 80˚ S 0.55G 80˚ S
9.5 bar
13.5 bar
Cleaning the Oil Filter in the Oil Pump
1. Refer to the following illustration to see the location of the
oil pump.
Oil Pump
2. Pull out the oil filter from the oil pump and remove any
deposits that have accumulated around the filter.
36RS/RSX
36LS/LSX
1.0G 80˚ ES
6.5 bar 6.5 bar
9.5 bar 10 bar
0.65G 80˚ S
9.5 bar 9.5 bar
14 bar 14 bar
Oil Strainer and
Water Separator
Oil Filter
Oil Pump
Filter
Oil
Storage Tank