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Manifold | Rollout | Manifold |
| Rollout |
Safety Switch | Pipe |
| Safety Switch | |
Pipe |
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| Flame Sensor | |
| Flame Sensor |
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| Ignitor |
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Ignitor | Gas Valve |
| Gas Valve | |
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| Limit Switch |
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Limit Switch |
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(Behind gas valve) | Vent Pipe | (Behind gas valve) |
| Vent Pipe |
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Electrical | Draft Inducer | Electrical |
| Draft Inducer |
Assembly | Junction Box |
| Assembly | |
Junction Box |
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| Pressure |
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| Pressure |
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| Switch | |
Silicone Tube | Switch | Silicone Tube |
| |
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| Condensate |
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| Condensate |
| Safety |
| Pan | |
Safety | Pan |
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Door Switch |
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Door Switch | Control |
| Control | |
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| Board | |
| Board |
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Transformer |
| Transformer |
| Power Factor |
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Blower | Capacitor | Blower |
| Choke (Not |
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| used on all |
| PSC MOTOR |
| ECM MOTOR | models) |
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FIGURE 5: Component Location - 97% Modulating PSC Models | FIGURE 6: Component Location - 97% Modulating ECM Models | |||
1.Examine the heat exchanger, vent pipe, combustion air passages, vent connectors and chimney to be sure they are clear and free of obstructions.
2.Examine the vent pipe making sure it is firmly in place, that it slopes slightly upward and is physically sound without holes and all of the connections are secure.
3.Examine the
4.Examine the furnace casing making sure the physical support is sound without sagging, cracks or gaps. Examine the furnace base making sure it is physically sound without cracks, gaps or sagging and has a good seal.
5.Examine the furnace casing for obvious signs of deterioration.
6.Examine the burner flames to make sure they are in good adjust- ment. Refer to the pictorial sketch shown in Figure 7 as a compar- ison to the actual flame.
Blue Cone Portion of Flame Should
Enter Heat Exchanger Tube
FIGURE 7: Burner Flame Drawing (Upflow Configuration Shown)
7.Examine and replace external air filters as needed to make sure they are not blocked, and proper airflow is provided to the furnace.
8.Examine any installed accessories or system components such as evaporator coils to insure proper operation, drainage of conden- sate, and that there is no water leakage or damage to the furnace or any components.
SECTION III: START-UP AND SHUTDOWN INSTRUCTIONS
Read the Instructions Below Before Trying to Start the Furnace!
If you do not follow these instructions exactly, a fire or explo- sion may result causing property damage, personal injury, and/or loss of life.
HOW YOUR GAS FURNACE WORKS
Your furnace is a very easy appliance to take for granted. Season after season, it sits there in your home, keeping you warm and comfortable. For this reason, you may never have given much thought to the way your furnace operates. In order to get the safest and most efficient oper- ation from your furnace, you should understand how your furnace does its job.
When you set your thermostat to provide more heat in your home, you are starting the heating cycle of the furnace. First, the inducer motor starts to purge the heat exchanger of any remaining gases. Next, the hot surface ignitor glows and after a
1.This appliance does not have a pilot. It is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand.
2.BEFORE OPERATING; smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.
3.Use only your hand to push the gas control switch to the ON posi- tion. Never use tools. If the switch will not operate by hand, don’t try to repair it, call a qualified service technician. Force or attempted repair may result in a fire or explosion.
4.Do not use this appliance if any part has been under water. Imme- diately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control, which has been under water.
Johnson Controls Unitary Products | 3 |
