OPERATING INSTRUCTIONS
1.STOP! Read the safety information above for your protection.
2.Set the thermostat to the lowest setting in the heat mode.
3.Turn off all electric power to the appliance.
4.Remove furnace burner access panel/door.
5.Move gas control switch to the OFF position. Do not force. See Figures
6.Wait five (5) minutes to clear out any gas. If you then smell gas, STOP! Follow “B” in the safety information above. If you don’t smell gas, go to next step.
7.Move gas control switch to the ON position. Do not force. See Fig- ures
8.Replace furnace burner access panel/door.
9.Turn on all electric power to the appliance.
10.Set thermostat to the desired setting. Burner will light, which may take
11.After three (3) trials for ignition, if the appliance will not operate fol- low the instructions, “TO TURN OFF THE APPLIANCE” and call your service technician or gas supplier.
TO TURN OFF THE APPLIANCE
1.Set the thermostat to lowest setting in heating mode.
2.Turn off all electric power to the appliance if service is to be per- formed.
3.Remove furnace burner access panel/door.
4.Move gas control switch to the “OFF” position. See Figures
5.Replace furnace burner access panel/door.
Should overheating occur, or the gas valve fail to shut off, turn the external manual gas valve in the gas supply line to the fur- nace to the “off” position and let the furnace cool off before shutting off the electrical power supply.
External Manual
Shutoff Valve
To Gas |
|
|
|
|
| To Gas | |||||
Supply |
|
|
|
|
| Supply | |||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Grounded Joint Union |
Drip Leg | may be Installed |
| Inside or Outside Unit. |
FIGURE 8: Gas Piping | |
Outlet |
| Vent Port | |
Pressure |
| ||
|
| ||
Port |
|
| |
Inlet |
| Outlet | |
Wrench | OFF |
| |
Boss | ON |
| |
Inlet | Main Regulator | ||
Pressure | On/Off Switch | Adjustment | |
Port |
| ||
(Shown in ON position) | |||
| |||
FIGURE 9: Single Stage Gas Valve
HIGH STAGE REGULATOR | ||
ADJUSTMENT |
| |
OUTLET |
| |
PRESSURE |
| |
PORT | VENT | |
| PORT | |
INLET | OUTLET | |
| ||
WRENCH |
| |
BOSS |
| |
INLET |
| |
PRESSURE |
| |
PORT | LOW STAGE REGULATOR | |
ON OFF | ||
SWITCH | ADJUSTMENT | |
FIGURE 10: |
| |
On/Off | Main | |
Regulator | ||
Knob | ||
Adjustment | ||
| ||
Inlet | Outlet |
Pressure | Pressure |
Tap | Tap |
FIGURE 11: Modulating Gas Valve
SECTION IV: FURNACE MAINTENANCE - USER INFORMATION
Before proceeding, be sure the area is well ventilated. Turn the thermostat OFF. If the blower is running, wait until it stops auto- matically. Turn OFF the gas and electrical power supplies to the furnace. Check all metal parts and surfaces to be sure they have cooled to room temperature before you begin.
EXTERNAL AIR FILTERS
Filters used with this furnace must be installed external to the furnace casing. DO NOT attempt to install filters inside the furnace cabinet.
Some installations may have the air filter in a rack attached to the cas- ing of the furnace or placed in the return air duct. If the filter location or replacement process is not obvious, contact your installer or service technician for assistance.
Every time the external air filters are changed the following items should be visually inspected:
•Check combustion air and vent pipe for blockage or leakage.
•Check all components to be sure they are in good condition and that there are no obvious signs of deterioration.
•Check the drain lines to make sure there are no cracks or leaks.
•Check for dirt or lint on any surfaces or on components. Do not try to clean any of the surfaces or components. Cleaning of the fur- nace and its components must be done by a qualified service pro- fessional.
4 | Johnson Controls Unitary Products |
