Blower Off Delay Setup Switch - Carrier 59MN7B Installation, Start-Up, Operating And Service And Maintenance Instructions

5. Turn 115 VAC power on.
6. Re- -check Maximum Heat Temperature Rise.
After the temperature rise has been verified:
1. Remove jumpers from thermostat terminals.
2. Allow the blower off delay to complete.
3. Turn set- -up switches SW1- -2 and SW4- -2 to the OFF posi-
tion unless two- -stage thermostat operation is desired. See
Fig. 65.
4. Proceed to "Adjust Blower Off Delay" or install blower
door if complete.
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.
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
mid- -point of rise range or slightly above.
Adjust Blower Off Delay (Heat Mode)
a. Remove blower door if installed.
b. Turn Dip switch SW- -7 or SW- -8 ON or OFF for desired
blower off delay. See Table 17 and Fig. 36, 65 and 72.)
Table 17 – Blower Off Delay Setup Switch
DESIRED HEATING MODE
BLOWER OFF DELAY (SEC.)
90
120
150
180
Adjust Cooling Airflow – High-Speed and
Low-Speed Cooling
The ECM blower can be adjusted for a range of airflow for
low-speed or high-speed cooling. See Table 7 – Air Delivery –
CFM (With Filter ) and Fig. 65 – Furnace Setup Switches and
Descriptions. Depending on the model size, the cooling airflow
can be adjusted from 1.5 to 6 tons based on 350 CFM ton.
SETUP SWITCH
(SW1---7 AND ---8)
POSITION
SW1--- 7 SW1--- 8
OFF OFF
ON OFF
OFF ON
ON ON
NOTE: 6 ton airflow will truncate at 2200 CFM on applicable
models.
Air Conditioning Setup Switch SW2
The high-speed or single-speed cooling airflow is adjusted by
turning Setup switches SW2-1, SW2-2 and SW2-3 either ON or
OFF. Select the required airflow from Table 7. Table is based
upon 350 CFM per ton. For other CFM per ton Setup switch
selections, see Fig. 36, Fig. 65 and Fig. 72.
Continuous Fan (CF) Setup Switch SW3
The Continuous Fan airflow selection via Setup switches SW3 is
also the switch setting for low-speed cooling when the furnace is
used with a two- -speed cooling or heat pump unit. Adjust SW3 to
match the airflow required for low-speed cooling. Select the
required airflow from Table 7 and Fig. 65.
NOTE:
The airflow selected via SW3 (Low-Speed Cooling
Airflow) cannot exceed the airflow selected via SW2 (High-Speed
Cooling Airflow). For other CFM per ton Setup switch selections,
see Fig. 36 and Fig. 65.
NOTE: The airflow settings for SW2 and SW3 selections are the
same for high and low stage cooling, EXCEPT for the default
values. See Table 7. For a complete explanation of cooling airflow,
refer to the section titled "Sequence of Operation."
NOTE: The airflow table for continuous fan is different than the
airflow table for low stage cooling. See Table 7.
Adjust Continuous Fan Airflow (and Low-Speed
Cooling Airflow)
Adjust continuous fan and low- -stage cooling airflow using SW3
and refer to Fig. 65.
The continuous fan speed can be further adjusted at a conventional
thermostat using the conintuous fan speed select function.
Changing the continuous fan speed at a conventional thermostat
DOES NOT change the low- -speed cooling airflow selected via
SW3 at the control board. Refer to the section titled "Continuous
Blower Speed Selection from Thermostat."
Adjust Thermostat Heat Anticipator.
1. Mechanical thermostat. Set thermostat heat anticipator to
match the amp. draw of the electrical components in the
R- -W/W1 circuit. Accurate amp. draw readings can be
obtained at the wires normally connected to thermostat
subbase terminals, R and W. The thermostat anticipator
should NOT be in the circuit while measuring current.
a. Set SW1- -2 switch on furnace control board to ON.
b. Remove thermostat from subbase or from wall.
c. Connect an amp. meter as shown in Fig. 63 across the R
and W subbase terminals or R and W wires at wall.
d. Record amp. draw across terminals when furnace is in
minimum heat and after blower starts.
e. Set heat anticipator on thermostat per thermostat
instructions and install on subbase or wall.
f. Turn SW1- -2 switch OFF.
g. Install blower door.
h. Electronic thermostat: Set cycle rate for 3 cycles per hr.
70