Bryant 310AAV instruction manual Speed Selection, Furnace Overheating Hazard

310AAV

!WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Disconnect 115-v electrical power and install lockout tag before changing speed tap.

c.Adjust air temperature rise by adjusting blower speed. Increase blower speed to reduce temperature rise. Decrease blower speed to increase temperature rise.

d.Turn thermostat down below room temperature and remove blower access door.

e.To change motor speed selection for heating, remove blower motor lead from control HEAT terminal (See Fig. 25.) Select desired blower motor speed lead from one of the other terminals and relocate it to the HEAT terminal (See Table 12 for lead color identification).

Reconnect original lead to SPARE terminal.

Table 12—Speed Selection

COLOR	SPEED	AS SHIPPED
White	Common	BLW
Black	High	COOL
Yellow{	Med--- High	SPARE
Blue*	Med--- Low	SPARE
Red*	Low	HEAT

*1/5 HP motor models: BLUE to HEAT, RED to SPARE { Not available on 1/5 HP motors.

NOTE: Continuous blower is the HEAT speed.

f.Repeat steps a through e.

g.When correct input rate and temperature rise is achieved, turn gas valve ON/OFF switch to OFF.

h.Remove manometer or similar device from gas valve.

i.Reinstall manifold pressure tap plug in gas valve.

!WARNING

FIRE HAZARD

Failure to follow this warning could result in personal injury, death and/or property damage.

Reinstall manifold pressure tap plug in gas valve to prevent gas leak.

j.Reinstall blower access door if removed.

k.Turn gas valve ON/OFF switch to ON.

!CAUTION

FURNACE OVERHEATING HAZARD

Failure to follow this caution may result in reduced furnace life.

Recheck temperature rise. It must be within limits specified on the rating plate. Recommended operation is at the midpoint of rise range or slightly above.

6.Set thermostat heat anticipator.

a.Mechanical thermostat - Set thermostat heat anticipat- or to match the amp. draw of the electrical components in the R-W circuit. Accurate amp. draw readings can be obtained at the wires normally connected to ther- mostat subbase terminals, R and W. The thermostat anticipator should NOT be in the circuit while measur- ing current. (1.) Remove thermostat from subbase or from wall. (2.) Connect an amp. meter as shown in Fig. 44 across the R and W subbase terminals or R and W wires at wall.

(3.) Record amp. draw across terminals when furnace is in heating and after blower starts.

(4.) Set heat anticipator on thermostat per thermostat instructions and install on subbase or wall.

b.Electronic thermostat: Set cycle rate for 4 cycles per hr.

7.Adjust blower off delay The blower off delay has 4 ad- justable settings from 90 sec to 180 sec. The blower off delay jumpers are located on the furnace control board. (See Fig. 25.) To change the blower off delay setting, move the jumper from one set of pins on the control to the pins used for the selected blower off delay. Factory off delay setting is 120 sec.

8.Set airflow CFM for cooling Select the desired blower motor speed lead for cooling airflow. See Table 5-Air De- livery-CFM (With Filter). See Table 12 for lead color identification.

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