Lennox CB26UH series Installation Instructions Manual Download

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Page 13

CB(X)26UH SERIES

Table 4. CB(X)26UH Blower Performance (2−Speed)

Model

External Static Pressure

Air Volume at Specific Blower Taps

High (Black)

Low (Red)

in. w.g.

cfm

L/s

cfm

L/s

−018

(LOW SPEED)

.10

1020

460

755

340

.20

960

435

715

325

.30

885

400

675

305

.40

100

800

365

625

285

.50

125

690

315

570

260

.60

150

525

250

500

235

−024

(MEDIUM

SPEED)

.10

1040

470

1000

455

.20

980

445

940

425

.30

905

410

870

395

.40

100

815

370

785

355

.50

125

705

320

680

310

.60

150

535

250

530

250

−030

(MEDIUM

SPEED)

.10

1350

610

1145

520

.20

1290

585

1090

495

.30

1225

555

1030

465

.40

100

1150

520

960

435

.50

125

1065

485

875

395

.60

150

965

455

775

365

−036

(LOW SPEED)

.10

1560

705

1405

635

.20

1480

670

1340

610

.30

1390

630

1270

575

.40

100

1290

585

1185

540

.50

125

1170

530

1090

495

.60

150

1015

480

975

460

−037

(LOW SPEED)

.10

1570

740

1330

625

.20

1520

715

1310

620

.30

1440

680

1250

590

.40

100

1300

615

1180

555

.50

125

1170

550

1070

505

.60

150

950

450

840

395

−042

(MEDIUM

SPEED)

.10

1940

880

1785

810

.20

1845

835

1705

775

.30

1745

790

1615

730

.40

100

1630

740

1515

685

.50

125

1495

680

1400

635

.60

150

1330

630

1265

595

−048

(supported in

TXV only)

(MEDIUM

SPEED)

.10

1945

880

1870

850

.20

1860

845

1790

810

.30

1765

800

1700

770

.40

100

1660

155

1600

725

.50

125

1540

700

1485

675

.60

150

1395

660

1350

635

−060

(MEDIUM

SPEED)

.10

2160

980

2075

940

.20

2065

935

1985

900

.30

1960

890

1885

855

.40

100

1845

835

1775

805

.50

125

1710

775

1645

745

.60

150

1550

730

1495

705

Summary of Contents for CB26UH series

Page 1: ... Unit Dimensions 2 CB X 26UH Series Units 3 Requirements 3 Installation Clearances 4 Installation 4 Condensate Drain 7 Duct System and Filters 8 Connecting Refrigerant Lines 9 Sealing the Unit 9 Electrical Connections 9 Airflow Cooling Blower Speed 12 Check Out Procedures 15 Operation 15 Maintenance 16 Accessories 16 Cabinet Insulation 16 Shipping and Packing List Package 1 of 1 contains the follo...

Page 2: ... for Upflow and LH RH Horizontal Air Discharge Applications Dimension 018 024 030 036 037 042 048 060 inches mm inches mm inches mm inches mm A 46 3 4 1187 51 1295 54 1372 60 1524 B 18 1 2 470 21 1 4 540 21 1 4 540 21 1 4 540 C 22 559 22 559 26 660 26 660 D 11 279 12 1 2 318 12 305 11 3 4 298 E 16 406 18 1 2 470 16 3 4 425 17 432 F 5 1 2 140 6 152 4 102 4 102 G 13 1 2 343 16 406 16 406 16 406 H 19...

Page 3: ...pe Warm Air Heating and Air Conditioning Systems NFPA No 90B IMPORTANT The CB X 26UH units are designed to match and must be used with outdoor units as rated The indoor sections are manufactured with a check expansion valve TXV or refrigerant flow control RFC device to provide opti mum refrigerant control and system performance with a variety of different capacities of outdoor units TXV units In s...

Page 4: ... free flow of return air Installation GENERAL INFORMATION WARNING Improper installation adjustment alteration service or maintenance can cause property damage personal inju ry or loss of life Installation and service must be per formed by a qualified installer or service agency CB X 26UH units are factory assembled and configured for installation in upflow or horizontal left hand air discharge app...

Page 5: ... cabinet integrity Ensure that there is adequate room to remove service and access panels if installing in the horizontal position 1 Determine whether left hand or right hand air discharge is required If right hand is required perform Right Hand Discharge Modification on page 6 2 Determine knockouts required for drain line connections 3 With access door removed knock out drain line opening for ins...

Page 6: ...OW OFF PREVENTION BRACKET S AND DRIP SHIELD FROM HERE THEN REINSTALL PAN HERE REINSTALL BRACKET HERE NOTE EXPANSION VALVE SHOWN ON COIL IS NOT ON CB26UH R RFC EQUIPPED UNITS Figure 7 Field Modification for Right Hand Discharge OPEN END FOR CONDENSATION DRAIN COIL ASSEMBLY PLUGGED END Figure 8 Right Hand Drain Plug Location REFRIGERANT METERING DEVICE NOTE See the outdoor unit installation instruct...

Page 7: ... making drain fitting connections to the drain pan hand tighten the fitting and use a sealant Over tightening the fittings can split connections on the drain pan 3 If the auxiliary drain line is to be used remove the plug and route the drain line so that water draining from the outlet will be easily noticed by the homeowner 4 After removal of drain pan plugs check the drain port to see if holes ha...

Page 8: ... DRAIN Test the drain pan and drain line after installation 1 Pour several quarts of water into drain pan enough to fill drain trap and line 2 Check to make sure the drain pan is draining completely no leaks are found in drain line fittings and water is draining from the end of the primary drain line 3 Correct any leaks found Duct System and Filters DUCT SYSTEM The air handler is provided with fla...

Page 9: ...s This is especially important when the unit is installed in an unconditioned area WARNING There must be an airtight seal between the bottom of the air handler and the return air plenum Use fiberglass sealing strips caulking or equivalent sealing method between the plenum and the air handler cabinet to ensure a tight seal Return air must not be drawn from a room where this air handler or any gas f...

Page 10: ... ground terminal marked GND Failure to do so can result in death or elec trical shock 4 Use UL listed wire nuts to connect the field supply conductors to the unit black and yellow leads and the ground wire to ground terminal marked GND 5 Replace the air handler access panel GND CONNECT BLACK TO BLACK CONNECT UNIT S YELLOW CONDUC TOR TO WHITE FIELD SUPPLY CONDUCTOR CONNECT GROUND WIRE TO GROUND TER...

Page 11: ...Page 11 CB X 26UH SERIES WARNING USE COPPER CONDUCTORS ONLY Figure 13 Wiring Diagram ...

Page 12: ...NGE BLOWER SPEED NOTE Refer to wiring diagram figure 13 and blower performance table 4 WARNING Electric shock hazard Disconnect all power supplies before servicing Replace all parts and panels before op erating Failure to do so can result in death or elec trical shock 1 Disconnect all power supplies 2 Remove the air handler access panel 3 Locate pin number 2 on the blower relay Two black wires are...

Page 13: ...75 365 036 LOW SPEED 10 25 1560 705 1405 635 20 50 1480 670 1340 610 30 75 1390 630 1270 575 40 100 1290 585 1185 540 50 125 1170 530 1090 495 60 150 1015 480 975 460 037 LOW SPEED 10 25 1570 740 1330 625 20 50 1520 715 1310 620 30 75 1440 680 1250 590 40 100 1300 615 1180 555 50 125 1170 550 1070 505 60 150 950 450 840 395 042 MEDIUM SPEED 10 25 1940 880 1785 810 20 50 1845 835 1705 775 30 75 174...

Page 14: ...8 0 40 100 813 384 963 454 1121 529 0 50 125 721 340 886 418 1033 487 0 60 150 036 LOW SPEED 0 10 25 1135 536 1354 639 1494 705 0 20 50 1120 529 1345 635 1469 693 0 30 75 1112 525 1317 621 1417 669 0 40 100 1079 509 1260 595 1336 630 0 50 125 995 470 1090 514 1250 590 0 60 150 042 MEDIUM SPEED 0 10 25 1202 567 1404 663 1540 727 0 20 50 1192 563 1413 667 1530 722 0 30 75 1160 547 1386 654 1507 711 ...

Page 15: ...mperature The indoor blower and auxiliary heat should come on together Allow a minimum of 3 minutes for all sequencers to cycle on S Set the thermostat so that it does not call for heat Allow up to 5 minutes for all sequencers to cycle off Operation COOLING COOLING ONLY OR HEAT PUMP When the thermostat calls for cooling 24 volts is put on the blower time delay relay coil After a delay the indoor b...

Page 16: ...y drain line a problem exists which should be investigated and corrected Contact a qualified service technician Cabinet Insulation IMPORTANT DAMAGED INSULATION MUST BE REPAIRED OR REPLACED before the unit is put back into operation In sulation loses its insulating value when wet damaged separated or torn Matt or foil faced insulation is installed in indoor equipment to provide a barrier between ou...

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