LAARS 9600 CB & HWG - Service Manual User Manual
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LAARS Heating Systems
TABLE OF CONTENTS
SECTION 1.
General Information
1A.
Introduction ................................................... 3
1B.
Start Up Procedures ..................................... 9
1C.
Checkout Procedures ................................... 9
1D.
Cleaning the Combustion Chamber Coil .... 10
1E.
Diverting Valve ........................................... 10
1F.
Safety Limit Switch ..................................... 10
1G.
Boiler Control .............................................. 10
1H.
Stack Switch ............................................... 11
1I.
Igniter .......................................................... 11
1J.
Transformer ................................................. 11
1K.
Unit Pump ................................................... 11
1L.
Blower ......................................................... 11
1M.
Gas Valve ................................................... 11
1N.
Time Delay Relay (TDR) .............................. 11
1O.
Operating Control ........................................ 11
1P.
Vent TCO .................................................... 12
1Q.
Intake TCO .................................................. 12
1R.
Thermal Cut-Out (TCO) ................................ 12
1S.
Delayed Ignition ........................................... 12
1T.
High Gas Consumption ............................... 12
1U.
Noisy Operation .......................................... 12
1V.
Short Cycling .............................................. 13
1W.
Lock Outs (& Trip Outs) .............................. 13
1X.
Routine De-Liming Procedure ...................... 14
1Y.
Sequence of Operation ................................ 14
SECTION 2.
Troubleshooting
2A.
Code ........................................................... 15