Patterson-Kelley MOD-04 ユーザーズマニュアル

 26 

 

 
8.  Before re-installing the burner, check the 

cleanliness of the heat exchanger and the condi-
tion of the combustion chamber.  If corrosion or 
leaks are noticed, (green or otherwise, please 
call the factory for assistance) 

9.  Install the burner and mixer core.  Reconnect 

the pilot tube, main gas union, 4 burner hold 
down nuts, electrode wire, ground wire, mixer 
core tube, UV Scanner.  Be sure the Pilot tube is 
not touching any other component. 

 

 

1.  Remove the burner as above. 

2.  Remove the front doors by pulling forward and 

upward. 

3.  Remove the top panel of the inner cabinet. 

4.  Close the isolation valves to the system. 

5.  Drain the boiler. 

6.  Disconnect the supply and return lines. 

7.  Remove the manifold assembly containing the 

temperature-pressure indicator, relief valve and 
the water flow switch (on the D series units dis-
connect at the grooved pipe coupling [Victau-
lic]). 

8.  Remove the nuts and bolts from the flanges of 

the inlet and outlet nozzles at the rear of the 
outer casing. 

9.  Remove the exchanger and clean the fins. 
 
Note:  The inner and outer cabinets are separate 
parts and reassembly is easier if the inner cabinet 
and exchanger are removed together as one unit.   
 

WARNING! 

The heat exchanger is heavy; use proper lifting 
equipment and techniques. 

 

 

 
1.  Follow "Pre-Start Check List" (Section 3.10) 

and all "Safety Checks" (Section 3.11). 

2.  Check gas pressure and adjust gas flow if neces-

sary.  (See "Gas Pressure Adjustment", Section 
3.12.3.) 

3.  Check air pressure and adjust air flow if neces-

sary.  (See "Air Flow Adjustment", Section 
3.12.2.) 

4.  Perform combustion check.  

 

 

Pilot 
Tube 

Ceramic Spider 

Ignition 
Electrode