National Comfort Products Comfort Pack U Series, Руководство по установке

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Installation Guide | Comfort Pack with 80% Gas Heat
Inspect the Heat Exchanger
Remove the heat furnace baffle panel (see page 29). Remove any
dirt or dust accumulation. Visually check the heat exchanger for
cracks and holes. If a crack or hole is observed, replace the heat
exchanger. Thorough inspection of the heat exchanger can be
done with furnace slid out of the cabinet. (See pages 29 & 30)
Burner Service
Inspect the burner/control compartment annually to determine
if cleaning is necessary. Open the burner/control compartment
and on the burner housing, clean the compartment and follow
the instructions below to remove and clean the burner.
Instructions for Burner Removal
Note: Components may be more easily accessed with the
furnace removed from cabinet. (See pages 29 & 30)
1. Shut the gas supply off ahead of the combustion valve.
2. Turn off electric supply.
3. Remove the upper cabinet panel to expose the heat exchanger
section and the burner/control compartment (see Figure 2).
4. Carefully loosen and remove the gas valve and gas train from
the side panel and burner orifice bracket.
5. Mark and disconnect the pressure switch wires. Disconnect
the tubing and remove the pressure switch.
6. Locate the secondary air shield end cap. Remove the four
screws holding it to the air shield and remove the end cap.
7. Locate the upper burner brackets (one on each side). Remove
the two screws (one on each side) that attach the burner
assembly to the secondary air shield assembly.
8. Tilt the burner assembly slightly and lift it free from the
retaining track under the burner assembly. Remove the burner
assembly from the cabinet.
Figure 6A
Flame Rollout Switch
Ignitor
Remove screws
Sight Glass for
Flame and Ignitor
Secondary Air
Shield Assembly
Remove screws
Flame Sensor
Upper Burner Bracket
(one on each end) -
Loosen burner assembly by
removing only the two screws
indicated.
Burner Assembly
Secondary Air
Shield End Cap
Remove secondary air shield end cap
by removing four screws indicated.
Remove screw
(one on each end)
Inspect and Clean the Burner
With the burner assembly removed, shine a flashlight on the
burner ribbons. Look for carbon buildup, scale, dust, lint, and/
or anything that might restrict flow through the spaces between
the burner ribbons. Holding the burner assembly so that any
foreign material will fall away from the burner, use a stiff bristle
brush to loosen and remove any foreign material(s). If the burner
is excessively dirty, refer to Figure 6A and remove one of the
burner end caps. Remove the four screws that hold the end cap
to the burner housing. Lightly tap the end cap to remove it.
Clean all foreign material from the burner and venturi. After the
burner is thoroughly clean, replace the end cap making certain
that it is tight against the burner housing
.
NOTE: IF ANY OF THE BURNER COMPONENTS
ARE DAMAGED OR DETERIORATED, REPLACE
THE BURNER ASSEMBLY.
Inspect the Lower Portion of the Heat Exchanger (with burner
assembly removed)
At the burner flame entrance of each tube, shine a bright light
into each heat exchanger section. If any light is observed,
replace the heat exchanger.
Instructions for Burner Installation
1.
With lower burner brackets going inside the retaining track,
set the fully assembled, clean burner in the unit.
2.
Secure the upper burner brackets to the secondary air shield
assembly.
3.
Replace the secondary air shield end cap.
4.
Attach and reconnect the pressure switch.
5.
Reinstall the gas train and gas valve to the burner orifice
bracket and side panel.
6.
Turn on the electric and the gas. Operate the furnace. Check
gas supply lines with a liquid leak detector or soap solution.
After it has been determined that there are no gas leaks and
the burner is operating satisfactorily, replace the cabinet panel
and the burner/control compartment panel.