Lanair DHI 300 - Manual (Page 41)

Section 3 - Chimney/Vent System
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12
Figure 2 - Typical Chimney Installation
NOTE: Class "A" compo-
nents require a 2" clear-
ance from combustible
materials. All other
chimney components
require a minimum 18"
clearance from com-
bustible materials
FAILURE TO PROVIDE PROPER VENTING OF THE HEATER EXHAUST
GASES COULD RESULT IN DEATH, SERIOUS INJURY, AND/OR PROPERTY
DAMAGE. FOLLOW CHIMNEY MANUFACTURERS INSTRUCTIONS.
!
General Requirements
1. Safe operation of any gravity vented heating appliance requires a proper air make-up
system to prevent the heater exhaust gases from being drawn into the building. These
gases could cause death, serious injury, and/or property damage. Exhaust fans, paint
booths may cause draft problems.
2. Never vent this heater into another heating appliances chimney. Never vent into ‘Class B”
chimney. Gas heaters use “Class B” chimney, it is rated for a much lower temperature than
is required for your waste oil furnace. This heater must have its own separate “Class A”
chimney.
3. Inspect and maintain the chimney on an annual basis.
Section 13 - Service / Maintenance
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41
Cleaning Combustion Chamber/ Heat Exchanger
1. Turn thermostat to the lowest setting; the heater must be completely cool to the touch
before attempting to clean the heater (place the fan/limit on the manual position to
start the fan and shorten the cooling time if the unit is hot). Turn off all power to the
heater (120 VAC) at the main disconnect. Place the fan/limit switch lever back into the
auto position so the fan is off upon restarting.
2. Remove the chimney connector from the heater.
3. Remove the burner and flame view port from the heater. Remove the galvanized panels
covering the gun/chamber doors.
4. Remove the gun/chamber doors from the heater by removing all of the screws.
NOTE: ALWAYS WEAR EYE, FACE AND BREATHING PROTECTION AND PROTECTIVE
CLOTHING WHEN INSPECTING OR CLEANING CHAMBER OR HEAT EXCHANGER.
!
NOTE: SPRAY ALL OF THE SCREWS WITH PENETRATING OIL TO PREVENT BREAK-
AGE. BEFORE REMOVING LET SET FOR FIVE MINUTES TO ALLOW THE OIL
TO PENETRATE. REPLACE STRIPPED OR BROKEN SCREWS.
!
WARNING: DISCONNECT ALL ELECTRICAL POWER TO HEATER BEFORE SERVICING
!