York 90 User Manual download pdf (Page 3)

SHUTDOWN

INSTRUCTIONS

TO TURN OFF GAS

TO FURNACE

CAUTION: Should overheating

occur, or the gas supply fail to shut

off, shut off the manual shut-off

valve to the furnace before shut-

ting off the electrical supply..

1. Set thermostat to the lowest setting.

2. Turn off all electrical power to the

furnace if service is to be performed.

3. Remove the control access panel.

4. Turn the knob on the gas control

clockwise to OFF.

5. Replace the control access panel.

YOUR FURNACE’S

FILTER -

WHAT IT DOES

The filter in your furnace takes the lint

and dust out of the air that passes

through it. This keeps dirt particles from

getting into the moving parts of the fur-

nace, where they could cause serious

damage. It also keeps the dirt from cir-

culating through your home.

As the filter continues to collect these

particles, it becomes clogged and no

longer allows enough air to circulate

through the furnace. If this happens, the

heat exchangers and blower motor

could overheat; a potentially dangerous

situation. It is very important to keep the

air filter clean!

Never operate your furnace without a

suitable air filter.

FREQUENCY OF

CHECKING FILTERS

Clean your furnace’s filter at least every

three months. If you need to replace a

filter, check the filter chart to be sure you

install the right size and type of filter for

your furnace.

If your home is new, you should check

the filter every week for the first four

weeks after you begin to use the fur-

nace, and then at least every three

weeks after that, especially if the system

runs constantly.

LOCATING/REMOVING

FILTERS

Most upflow furnaces have their filters

located on the side or bottom of the

furnace, inside the blower compartment.

Some models may have the filter located

in an accessory such as a single side

return filter frame.

If your furnace has a single side return

filter frame accessory like the one

shown, slide the filters out of the acces-

sory through the slot on its side.

To check filters located in the blower

compartment, remove the blower com-

partment panel.

NOTE: The spring-loaded safety

cutoff switch, mounted under the

blower deck in the control box will

automatically cut off the electrical

power supply to the furnace when

the blower panel is removed.

A filter mounted on the side of the fur-

nace can be removed by pushing down

on the looped end of the wire filter re-

tainer until it clears the lip of the furnace

casing.

The retainer may be swung toward the

center of the furnace, exposing the filter

for removal. Reverse the procedure to

reinstall filters.

GAS VALVE

DROP LEG

GROUND JOINT UNION

MAY BE INSTALLED

INSIDE OR OUTSIDE UNIT

TO GAS

SUPPLY

EXTERNAL MANUAL

SHUTOFF VALVE

TO GAS

SUPPLY

DROP LEG

WHITE-RODGERS 36E98 VALVE

FILTER RETAINER

TYPICAL GAS PIPING

FILTER FRAME

®

Wiring

Terminals

Outlet

Main

Regulator

Adjust

Wrench

Boss

ON - OFF Switch

Inlet

Outlet

Pressure

Tap

WHITE-RODGERS 36E24 VALVE

3

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