Burner maintenance – Reznor MAPSII Series REDA Users Manual User Manual

Page 21

Form RZ-NA O-MAPS II, P/N 209179 R7, Page 21

Gas-fired Heat Exchanger Maintenance

Burner Removal

Instructions

(Refer to FIGURES

12A and 12B)

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FIGURE 12A -

Remove the Venter

Assembly

5. Disconnect the Gas Train - At the gas valves, mark and disconnect the

wires. Disconnect the gas supply line at the connection outside the fur-

nace. Carefully remove the burner orifices and orifice adapter locking nuts.

Remove the manifold brackets. Slide the complete gas train including

valves and optional pressure switches out of the unit.

6. Remove Burner Assembly - Remove the screws above and below the

burner assembly. Carefully pull the burner assembly out of the cabinet.

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

WARNING: Turn

off the power

before performing

maintenance

procedures. Lock

disconnect switch

in OFF position.

When you turn off

the power supply,

turn off the gas

at the external

manual valve. See

Hazard Levels,

page 3.

This gas heat section is equipped with a

CORE

style heat exchanger.

The outside of the heat exchanger is accessible by opening the blower section

door and sliding the blower out of the unit. Remove any external dirt or dust

accumulation. Visually check the heat exchanger for cracks or holes. If a crack

or hole is observed, replace the heat exchanger.
NOTE: Inspection of the lower portion of the heat exchanger is done with the

burner removed. See the Burner Service section below for information on

inspecting the lower portion of the heat exchanger.

Burner Maintenance

This furnace is equipped with a

CORE2

style burner.

Inspect the gas heat section annually to determine if cleaning is necessary. If

there is an accumulation of dirt, dust, and/or lint, clean the compartment and

follow the instructions below to remove and clean the burner.

CAUTION: Use of eye protection is recommended.

1. Shut off the gas supply.

2. Turn off electric supply.

3. Remove the gas heat section access panel.

4. Remove the venter assembly. Disconnect the tubing. Mark and discon-

nect the three venter motor wires at the DSI control, capacitor wires at the

capacitor (if applicable), and ground screw (located on the control panel).

Follow procedure in

FIGURE 12A, STEPS 1 and 2, removing the whole

assembly including the large mounting plate.

Inspect and

Clean the Burner

NOTE: If the installation includes a Model JHUP curb duct furnace, the pro-

cedures described in Paragraph 9 also apply to the duct furnace. For illustra-

tion of a curb duct furnace, see Form I-MAPS II, Paragraph 9.4.

This manual is related to the following products:

MAPSII Series RECA Users Manual MAPSII Series RDDA Users Manual MAPSII Series RDCA Users Manual MAPSII Series RDA Users Manual MAPSII Series RCA Users Manual