68
LP- 428 REV. 9.2.14
The combustion chamber insulation in this product contains ceramic fiber material. Ceramic fibers can be converted to
cristobalite in very high temperature applications. The International Agency for Research on Cancer (IARC) has concluded,
“Crystalline silica inhaled in the form of quartz or cristobalite from occupational sources is carcinogenic to humans (Group
1).”
Avoid breathing dust and contact with skin and eyes.
Use NIOSH certified dust respirator (N95). This type of respirator is based on the OSHA requirements for cristobalite
at the time this document was written. Other types of respirators may be needed depending on job site conditions.
Current NIOSH recommendations can be found on the NIOSH website: http://www.cdc.gov/niosh/homepage.html.
NIOSH approved respirators, manufacturers, and phone numbers are also listed on this website.
Wear long-sleeved, loose fitting clothing, gloves, and eye protection.
Apply enough water to the combustion chamber lining to prevent dust.
Wash potentially contaminated clothes separately from other clothing. Rinse clothes washer thoroughly.
NIOSH stated First Aid.
Eye: Irrigate immediately.
Breathing: Fresh air.
B. COMBUSTION CHAMBER COIL CLEANING INSTRUCTIONS FOR HEATER
*Before beginning this procedure, you must have on hand the following items:
a nylon, stainless steel, or brass brush (not steel)
lime scale removing solution, approved for use with stainless steel
gloves and eye protection
1. Shut down the boiler by using the following steps:
a. Close the gas valve, shut down the unit, and wait for the unit to be cool to the touch.
b. Disconnect the condensate piping from the outside connection, (not from the boiler side), so flow from condensate reservoir
can be observed.
c. Disconnect electrical connections from the gas valve, spark electrode and flame rectification probe and combustion blower.
d. Remove the (4) screws on the aluminum ¾” NPT connector on the right side of the gas valve.
e. Disconnect the wiring connected to the combustion blower motor.
f. Remove the (6) 10MM nuts from the burner plate assembly.
Figure 30
g. Pull the entire burner plate assembly with blower still attached towards you, while removing or pushing aside any wiring to
allow the removal of the assembly.
2. Using a spray bottle filled with lime remover, spray liberally on the coils, making sure the solution penetrates and funnels down
through the condensate system. If the condensate system is blocked, let chemical penetrate for at least 15 minutes, or until condensate
drains.
3. Use the nylon, stainless steel or brass brush (do not use steel) and scrub coils to remove any buildup. Then vacuum the debris from
the coils.
4. Spray the coils with clear water, making sure to confine the spray to the area being cleaned (Try to avoid getting the back ceramic
wall of the unit wet). Flush the combustion chamber with fresh water until it runs clear from the condensate. At this point, the boiler
should be ready to be re-assembled.
a. Inspect gaskets.
b. Re-install the burner assembly.
c. Replace and tighten the (6) 10 mm nuts to the burner plate using staggered tightening sequence (see detail).
Summary of Contents for MODCON1000
Page 40: ...40 LP 428 REV 9 2 14 E GAS VALVE Figure 22 Mod Con 1000 Gas Valve ...
Page 46: ...46 LP 428 REV 9 2 14 Figure 25 Figure 26 Cascade Resistor Plug Installation Detail ...
Page 47: ...47 LP 428 REV 9 2 14 Figure 27 Mod Con Cascade Master and Follower Wiring ...
Page 48: ...48 LP 428 REV 9 2 14 Figure 28 Mod Con Internal Connection Diagram LP 428 K ...
Page 70: ...70 LP 428 REV 9 2 14 Figure 31 MOD CON 1000 External Parts Blowout ...
Page 71: ...71 LP 428 REV 9 2 14 Figure 32 MOD CON 1700 External Parts Blowout ...
Page 72: ...72 LP 428 REV 9 2 14 Figure 33 ...
Page 73: ...73 LP 428 REV 9 2 14 Figure 34 LP 445 S ...
Page 74: ...74 LP 428 REV 9 2 14 Figure 35 LP 428 V ...
Page 75: ...75 LP 428 REV 9 2 14 Figure 36 ...
Page 78: ...78 LP 428 REV 9 2 14 ...
Page 79: ...79 LP 428 REV 9 2 14 ...
