Carrier 130 Series Installation, Start-Up, And Operating Instructions Manual page 20

AC/HP JUMPER POSITION: HP—CMFT, HEAT PUMP—COMFORT, HEATING AIRFLOW
Airflow
Selection
Furnace Size
Cool Size
Jumper
Position
LO
M-LO
060
M-HI
HI
LO
M-LO
080
M-HI
HI
LO
M-LO
100**
M-HI
HI
LO
M-LO
120**
M-HI
HI
* Minimum airflow is set for electronic air cleaner: 060—500 CFM, 080—500 CFM, 100—700 CFM, 120—700 CFM
** Air delivery may be reduced by as much as 3 percent when using a single side return.
NOTE:
Continuous-fan settings are 50 percent, 65 percent, or 100 percent of selected cooling airflow.
c. Verify furnace model. Table 11 can only be used for model
58UHV/58UXV Furnaces.
d. Find installation altitude in Table 11.
NOTE: For Canada altitudes of 2000 to 4500 ft, use U.S.A.
altitudes of 2001 to 3000 ft in Table 11.
e. Find closest natural gas heat value and specific gravity in
Table 11.
f. Follow heat value and specific gravity lines to point of
intersection to find orifice size and low- and high-heat
manifold pressure settings for proper operation.
EXAMPLE: (0—2000 ft altitude)
Heating value = 1075 Btu/cu ft
Specific gravity = 0.62
Therefore: Orifice No. 45
Manifold pressure:
*Furnace is shipped with No. 45 orifices.
In this example, all main burner orifices are the correct size and
do not need to be changed to obtain proper input rate.
DO NOT redrill orifices. Improper drilling (burrs, out-of-
round holes, etc.) can cause excessive burner noise and
misdirection of burner flames. This can result in flame
impingement of burners and heat exchangers, causing fail-
ures. (See Fig. 21.)
g. Check and verify burner orifice size in furnace. NEVER
ASSUME ORIFICE SIZE; ALWAYS CHECK AND
VERIFY.
3. Adjust manifold pressure to obtain input rate.
Table 10—Heat Pump Comfort Heating Nominal CFM
At Up to 0.70-in. w.c. ESP (With Filter)
Single-Speed
CFM
Cool CFM Per Ton
Jumper Position
Tons
400 350
1-1/2 540 500*
2 720 630
2-1/2 900 790
3 1080 945
2-1/2 900 785
3 1080 945
3-1/2 1260 1100
4 1440 1260
3 1075 940
3-1/2 1260 1100
4 1440 1260
5 1900 1575
3 1045 945
3-1/2 1260 1100
4 1440 1255
5 1800 1575
3.4-in. wc for high heat
1.4-in. wc for low heat
Two-Speed (High/Low)
Cool CFM Per Ton Jumper Position
400
315 High Low
500* 565 500*
570 780 500*
710 945 585
755 1135 700
710 945 605
850 1135 715
990 1325 830
1135 1510 940
855 1130 700
990 1325 820
1130 1510 935
1420 1890 1170
860 1075 780
980 1280 875
1125 1485 965
1410 1900 1170
a. Remove caps that conceal adjustment screws for low- and
high-heat gas valve regulators. (See Fig. 22.)
b. Move setup switch SW-2 on control to ON position. (See
Fig. 18.) This keeps furnace locked in low-heat operation.
c. Jumper R and W/W1 thermostat connections on control to
start furnace.
d. Turn low-heat adjusting screw (5/64 hex Allen wrench)
counterclockwise (out) to decrease input rate or clockwise
(in) to increase input rate.
NOTE: DO NOT set low-heat manifold pressure less than 1.3-in.
wc or more than 1.7-in. wc for natural gas. If manifold pressure is
outside this range, change main burner orifices.
DO NOT bottom out gas valve regulator adjusting screw.
This can result in unregulated manifold pressure and result in
excess overfire and heat exchanger failures.
NOTE: If orifice hole appears damaged or it is suspected to have
been redrilled, check orifice hole with a numbered drill bit of
correct size. Never redrill an orifice. A burr-free and squarely
aligned orifice hole is essential for proper flame characteristics.
e. Move setup switch SW-2 to OFF position after completing
low-heat adjustment.
f. Jumper R and W2 thermostat connections on control center.
(See Fig. 15.) This keeps furnace locked in high-heat
operation.
g. Turn high-heat adjusting screw (5/64 hex Allen wrench)
counterclockwise (out) to decrease input rate or clockwise
(in) to increase rate.
NOTE: DO NOT set high-heat manifold pressure less than 3.2-in.
wc or more than 3.8-in. wc for natural gas. If manifold pressure is
outside this range, change main burner orifices.
20
CFM
350 315
High Low High
500* 500* 500*
660 500* 595
830 515 740
990 610 895
825 535 1040
990 630 1190
1150 725 890
1325 825 1040
980 700 1190
1155 750 1490
1350 825 885
1655 1035 1035
975 750 750
1140 790 790
1320 880 880
1650 1025 1025
Low
500*
500*
500*
555
500*
560
655
740
700*
700*
740
920
750
760
835
970