Maintenance - Goodman GRL SERIES Installation Instructions Manual

GAS FURNACE (DIRECT
DRIVE) INSTRUCTIONS
FOR CHANGING BLOWER
SPEED
WARNING
!
DISCONNECT THE ELECTRICAL
SUPPLY TO THE FURNACE
BEFORE ATTEMPTING TO
CHANGE THE BLOWER SPEED.
FAILURE TO DO SO CAN CAUSE
ELECTRICAL SHOCK RESULTING
IN PERSONAL INJURY OR DEATH.
The blower motor is wired for blower
speeds required for normal operation
as shown.
If additional blower speed taps are
available (leads connected to "M1"
and "M2" on the IFC), speeds may be
changed if necessary to fit
requirements of the particular
installation. Reconnect the unused
motor leads to "M1" or "M2." Check
motor lead color for speed
designation.
TABLE 11
90 PLUS AIR FLOW PERFORMANCE
MODEL BLOWER/
MOTOR HP
(-)GRL-04 11 x 7 / /
1
2
(-)GRL-06 11 x 7 / /
1
2
(-)GRL-09 12 X 11 / /
3 4
* Factory-Set High Heating speed
1
A = 17 ⁄ " Cabinet Size
2
B = 21" Cabinet Size
NOTE: Units tested with filters in place.
44
Heating speeds should not be
reduced where it could cause the
furnace air temperature to rise to
exceed the maximum outlet air
temperature specified for the unit.
IMPORTANT: Any combination of
motor taps to the IFC can be used
provided the temperature rise is
within the specified range when in
high or low heat and that there is
enough airflow in the cooling mode.
When changing the motor tap
speeds, the temperature rise must be
checked on both heat speeds and
temperature drop in cooling must be
checked again after the change is
made to ensure that the temperatures
are within the required specified
ranges.
SPEED
.1 .2
UPFLOW MODELS
LOW 805 780
*M-LO 920 885
M-HI 1140 1110
HIGH 1360 1320
LOW 770 740
*M-LO 880 845
M-HI 1060 1025
HIGH 1260 1215
LOW 1235 1210
M-LO 1490 1465
*M-HI 1720 1670
HIGH 2100 2050
TABLE 12
FILTER SIZES
FURNACE
WIDTH

MAINTENANCE

!
THESE INSTRUCTIONS ARE
INTENDED AS AN AID TO
QUALIFIED SERVICE
PERSONNEL FOR PROPER
INSTALLATION, ADJUSTMENT
AND OPERATION OF THIS UNIT.
READ THESE INSTRUCTIONS
THOROUGHLY BEFORE
ATTEMPTING INSTALLATION
OR OPERATION. FAILURE TO
FOLLOW THESE INSTRUCTIONS
MAY RESULT IN IMPROPER
INSTALLATION, ADJUSTMENT,
SERVICE OR MAINTENANCE,
POSSIBLY RESULTING IN FIRE,
ELECTRICAL SHOCK, CARBON
MONOXIDE POISONING,
EXPLOSION, PROPERTY
DAMAGE, PERSONAL INJURY
OR DEATH.
CFM @ ESP
.3 .4
760 720
850 810
1085 1045
1280 1235
710 675
815 790
990 960
1175 1135
1185 1150
1440 1405
1620 1600
2000 1955
UPFLOW FILTER SIZES
INPUT BOTTOM
MBTUH SIZE
17 / " 45, 60 15 / " X 25"
1 2 3 4
21" 90 19 / " X 25"
1
4
WARNING
.5 .6 .7
685 645 605
775 730 690
1010 950 890
1195 1140 1080
645 605 570
760 715 670
925 880 835
1100 1040 985
1120 1075 1035
1375 1315 1255
1580 1520 1460
1910 1825 1745
SIDE
QUANTITY
SIZE
15 / " X 25" 1
3 4
15 / " X 25" 1
3
4