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Maintenance schedule

Maintenance procedures

Boiler must be serviced and maintained

 WARNING

The boiler must be inspected and started 
annually at the beginning of the heating 
season by a qualified service technician.  In 
addition, the maintenance and care of the 
boiler designated on page 5 of this manual 
and explained on pages 6 through 8 must 
be performed to assure maximum boiler 
efficiency and reliability.  Failure to service 
and maintain the boiler and system could 
result in equipment failure, causing possible 
severe personal injury, death, or substantial 
property damage.

 NOTICE

The following information provides detailed 
instructions for completing the maintenance 
items listed in the maintenance schedule on 
page 5.  In addition to this maintenance, 
the boiler must be serviced and started up 
at the beginning of each heating season by a 
qualified service technician.

Check boiler area

 WARNING

To prevent potential of severe personal 
injury, death, or substantial property damage, 
eliminate all materials discussed below from 
the boiler vicinity and the vicinity of the 
boiler combustion air inlet.  If contaminants 
are found:

Remove products immediately from the 
area.  If they have been there for an extended 
period, call a qualified service technician to 
inspect the boiler for possible damage from 
acid corrosion.

If products cannot be removed, immediately 
call a qualified service technician to 
re-pipe vent and air piping and locate 
vent termination/air intake away from 
contaminated areas.

1.  Combustible/flammable materials -- Do not store 
 

combustible materials, gasoline or any other flammable 

 

vapors or liquids near the boiler.  Remove immediately if 

 found.

2.  Air contaminants -- Products containing chlorine or 
 

fluorine, if allowed to contaminate the boiler intake air, 

 

will cause acidic condensate in the boiler.  This will cause 

 

significant damage to the boiler if allowed to continue.   

 

Read the list of potential materials listed in Table 1A on 

 

page 4 of this manual.  If any of these products are in the 

 

room from which the boiler takes its combustion air, they 

 

must be removed immediately or the boiler combustion 

 

air (and vent termination) must be relocated to another 

 area.

Check pressure/temperature gauge

1.  Make sure the pressure reading on the boiler pressure/ 
 

temperature gauge does not exceed 24 psi (165.5 kPa).  

 

Higher pressure may indicate a problem with the 

 expansion 

tank.

2.  Contact a qualified service technician if problem persists.

Check vent piping

1.  Visually inspect the flue gas vent piping for any signs of 
 

blockage, leakage, or deterioration of the piping.  Notify 

 

your qualified service technician at once if you find any 

 problems.

 WARNING

Failure to inspect the vent system as noted 
above and have it repaired by a qualified 
service technician can result in vent system 
failure, causing severe personal injury or 
death.

Check air piping

1.  Visually inspect the air inlet termination to be sure it is 
 

unobstructed.  Inspect the entire length of air piping to 

 

ensure piping is intact and all joints are properly sealed.

2.  Call your qualified service technician if you notice any 
 problems.

Check relief valve

1.  Inspect the boiler relief valve and the relief valve 
 

discharge pipe for signs of weeping or leakage.

2.  If the relief valve often weeps, the expansion tank may 
 

not be working properly. Immediately contact your 

 

qualified service technician to inspect the boiler and 

 system.

Check condensate drain system

1.  Inspect the condensate drain line, condensate PVC 
 

fittings and condensate trap.

Fill condensate trap with water

1.  Remove the PVC cap retaining screw from the PVC cap 

(FIG. 2-1).

2.  Remove the 2" PVC cap with the switch located at the top 
 

of the trap (FIG. 2-1).

                  

User’s Information Manual 

Summary of Contents for KNIGHT 400 - 801

Page 1: ...s are likely to be present WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Donottouchanyelectricswitch donotuseanyphoneinyour building Immediately call your gas supplier from a near by p...

Page 2: ...operty damage NOTICE indicates special instructions on installation operation or maintenance that are important but not related to personal injury or property damage Contents HAZARD DEFINITIONS 2 PLEA...

Page 3: ...use this boiler if any part has been under water The possible damage to a flooded appliance can be extensive and present numerous safety hazards Any appliance that has been under water must be replace...

Page 4: ...Metal fabrication plants Beauty shops Refrigeration repair shops Photo processing plants Auto body shops Plastic manufacturing plants Furniture refinishing areas and establishments New building constr...

Page 5: ...ion Check wiring and connections Perform start up checkout and performance verification per Sec tion 10 in the Knight XL Installation and Operation manual Flame inspection stable uniform Flame signal...

Page 6: ...the boiler intake air will cause acidic condensate in the boiler This will cause significant damage to the boiler if allowed to continue Read the list of potential materials listed in Table 1A on page...

Page 7: ...lbow field supplied as shown in FIG 2 2 Call your qualified service technician to inspect the boiler and system 5 Do not expose condensate line to freezing temperatures 6 Use only plastic tubing or pi...

Page 8: ...or discharge line may be blocked Immediately shut down the boiler following the operating instructions on page 9 of this manual Call your qualified service technician to inspect the boiler and system...

Page 9: ...to replace any part of the control system and any gas control which has been under water I RX FDQQRW UHDFK RXU JDV VXSSOLHU FDOO the fire department 1 STOP Read the safety information above on this l...

Page 10: ...n to store the new settings and return to the Status Screen Please note that the brackets denote screen status NOTICE User s Information Manual Adjusting parameters CAUTION Before changing parameters...

Page 11: ...e changed by the user or the installer by accessing the Temperature Units parameter The default is F To change the temperature units access the clock menu as described in the User section this page Ro...

Page 12: ...o clear the combustion chamber and vent system of residual flue products SHUTDOWN The unit has been placed in the OFF position The controlled temperature has exceeded its set point and its offset BLOC...

Page 13: ...t measured by the flame sense circuit FAN SPEED The speed of the combustion blower BOILER PUMP The status of the boiler pump output SYSTEM PUMP The status of the system pump output DHW PUMP The status...

Page 14: ...ack Skip Screen E NAVIGATION Dial Function Turning the NAVIGATION dial will select the next or previous Status Screen Pressing the NAVIGATION dial will show the next fault NSB Night Setback trigger or...

Page 15: ...15 Notes User s Information Manual...

Page 16: ...on page 8 and the clarification of the user password information on pages 10 and 11 Revision C ECO C09197 updates made to the SMART SYSTEM control ECR R04523 Revision D ECO C10143 reflects updates mad...

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