Bryant 350MAV User's Manual | Page 6

Bryant Furnace User's Manual - 350MAV.
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necessary adjustments to operate 
the blower at either the low- or 
high-heat speed.

 

 

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NOTE: 

 

If the burners fail to ignite after 

4 attempts, the furnace control system 
will lock out. If lockout occurs, main 
burners fail to light, or blower does not 
come on, shut down the furnace and 
call your dealer for service.

12. Set your thermostat to the temper-

ature that satisfies your comfort 
requirements. 

SUGGESTION: Setting the ther-
mostat back a few degrees and 
compensating for the difference 
with warmer clothing can make a 
big difference in your fuel con-
sumption. The few degrees at the top 
of your thermostat “comfort level” 
are the most costly degrees to obtain.

OP

E

N

 

When room temperature drops 
below the temperature selected 
on the thermostat, the furnace 
will be switched on automatically. 
When room temperature reaches 
the temperature selected on the 
thermostat, the furnace will be 
switched off automatically.

Some thermostats have a FAN 
mode with 2 selections, AUTO 
and ON. When thermostat is set 
to AUTO, the furnace blower 
cycles on and off. In ON mode, the 
furnace blower runs continu-
ously. Continuous fan keeps the 
temperature level in your home 
more evenly balanced. It also per-
mits the indoor air to be continu-
ously filtered. Fan On 

 

Plus

 

™ –On 

all but the 340MAV, the blower 
speed can be increased or 
decreased if desired due to change 
of seasons, large gatherings in 
your home, etc. Simply change 
your FAN from ON to OFF (or 
AUTO depending on your thermo-
stat), and then return to ON. The 
blower will switch to the next 
highest speed. There are at least 3 
speeds to choose from. If the 
blower is running on its highest 
speed, a request to change will 
direct the blower to return to its 
lowest speed.

 

SHUTTING DOWN 
YOUR FURNACE

 

Should you need to shut down your 
furnace for service or maintenance, 
you will need to turn the furnace off.

The following procedures must be 
followed:

1. Set your room thermostat to the 

lowest temperature setting. 
(See Fig. 19.)

 

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2. Close the external manual gas 

valve. (See Fig. 9.)

3. Turn off electrical supply to the 

furnace. (See Fig. 20.)

4. Remove main furnace door. 

(See Fig. 11.)

5. Turn switch on the gas valve to 

OFF position. 
(See Fig. 21 or 22.)

 

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22

 

6. Replace main furnace door. 

(See Fig. 16.)

7. If the furnace is being shut down 

because of a malfunction, call 
your dealer as soon as possible.

 

 

PERFORMING 
ROUTINE 
MAINTENANCE

 

NOTE:

 

 The qualified installer or 

agency must use only factory-
authorized replacement parts, kits, 
and accessories when modifying this 
product.

®

 

CAUTION

 

Furnace is not to be installed,
operated, and then turned off
and left turned off in an unoc-
cupied structure during winter.
(See “Heading South for the
Winter?” procedures in main-
tenance section on page 9.)
Freeze damage to furnace
would occur.

For 352MAV and 355MAV

ON

OFF

For 340MAV and 350MAV

or

!

 

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