Company UCQB Series Spec Sheet

NOTES:
1. All coil connections are sweat
NOTES:
1. Heating output will not exceed output of hot water source.
2. Approved for installation with 0" clearance to combustible materials.
3. Contact factory for correct matches with outdoor unit.
(1) Heat BTUH is at 70°F entering air temperature.
(2) Based on 20º Delta -T. Velocity not to exceed 4ft./sec.
UCQB Series
Compatible with gas fired water heaters
Up to 45,300 BTUH Hydronic Heat
NOTES:
1. Add nominal .05 static when optional wall panel is used.
2. Shaded areas are factory motor settings.
In keeping with its policy of continuous
progress and product improvement,
First Co. reserves the right to make
changes without notice. Maintenance
for all First Co. products is available
under "Product Maintenance" at www.
firstco.com.
PERFORMANCE DATA
UNIT MODEL
NOMINAL
COOLING
BTUH
HEATING BTUH (1000) ENTERING TEMPATURE
Delta -T 20ºF & GPM
TOTAL
AMPS
(MOTOR)
(120V)
TOTAL
AMPS
(PUMP)
(120V)
MIN.
CIRCUIT
AMPACITY
MAX. FUSE
OR HACR
BREAKER
120ºF GPM 140ºF GPM
18-20UCQB
18,000 18.5 1.9 25.9 2.6 5.4 0.57 8 15
24-26UCQB
24,000 / 18,000 22.1 2.2 31.0 3.1 5.4 0.57 8 15
30-31UCQB
30,000 / 24,000 25.0 2.5 35.1 3.5 8.1 0.57 11 15
32UCQB
30,000 / 24,000 27.0 2.7 37.7 3.8 8.1 0.57 11 15
36/37UCQB
36,000 / 30,000 29.6 3.0 41.3 4.1 8.1 0.57 11 15
38UCQB
36,000 / 30,000 32.3 3.2 45.3 4.5 8.1 0.57 11 15
BLOWER DATA
UNIT
MODEL
MOTOR
H.P.
(120V)
MOTOR
AMPS
(120V)
FAN
SPEED
CFM vs. EXTERNAL STATIC PRESSURE
0.10 0.15 0.20 0.25 0.30 0.40 0.50
18/19UCQB
1/3 5.4
MED-HIGH 790 775 760 745 730 700 670
MED-LOW 710 695 680 665 650 630 610
LOW 560 550 540 525 510 490 460
20UCQB
1/3 5.4
MED-HIGH 770 750 730 710 690 650 610
MED-LOW 690 675 660 645 630 590 550
LOW 540 525 510 495 480 450 420
24/25UCQB
1/3 5.4
HIGH 840 820 800 780 760 710 660
MED-HIGH 770 750 730 710 690 650 610
MED-LOW 690 665 660 645 630 590 550
26UCQB
1/3 5.4
HIGH 860 845 830 810 790 750 700
MED-HIGH 780 765 750 735 720 680 640
MED-LOW 700 685 670 655 640 600 560
30/31UCQB
1/2 8.1
HIGH 1070 1045 1020 995 970 920 850
MED-HIGH 1020 1000 980 960 940 890 820
MED-LOW 760 755 750 735 720 680 640
32UCQB
1/2 8.1
MED-HIGH 1140 1110 1080 1050 1020 960 900
MED-LOW 900 885 870 855 840 790 740
LOW 650 645 640 635 630 610 580
36/37UCQB
1/2 8.1
HIGH 1160 1135 1110 1080 1050 990 930
MED-HIGH 1120 1095 1070 1045 1020 970 900
MED-LOW 890 875 860 845 830 790 740
38UCQB
1/2 8.1
HIGH 1400 1375 1350 1325 1300 1250 1200
MED 1260 1245 1230 1210 1190 1150 1100
LOW 1090 1080 1070 1055 1040 1010 970
PHYSICAL DIMENSIONS
UINT
MODEL
A
B C D
E
FILTER
SIZE
LIQUID
LINE
SUCTION
LINE
18-25UCQB
22-1/8 18 43 18 12-1/2 18 X 18 3/8" O.D. 5/8" O.D.
26/31UCQB
22-1/8 18 43 18 12-1/2 18 X 20 3/8" O.D. 3/4" O.D.
32-37UCQB
22-1/8 21 43 18 15-1/2 18 X 24 3/8" O.D. 3/4" O.D.
38UCQB
28-1/8 21 46 24-1/8 15-3/4 24 X 24 3/8" O.D. 7/8" O.D.
WATER
OUTLET
(7/8" O.D.)
E
D
HIGH VOLTS
LOW VOLTS
LIQUID
SUCTION
C
A
B
OPTIONAL DRAIN
OUTLETS (BOTH SIDES AND FRONT)
2 1/2"
1"
WATER
INLET
(7/8” O.D.)
OPENING WITH
COVER REMOVED
18-31UCQB = 18-1/2 X 6-3/8
32-37UCQB = 18-1/2 X 9-3/8
38UCQB = 24-1/4 X 9-3/8
(See P. 3 for Model Numbers)
-2-
NSF/ANSI
169 : 2016