First Co HBQB -3, HBQB -2.5, HBQB -4 User Manual

NOW EQUIPPED WITH MULTI-FUNCTION MICRO-PROCESSOR

HBQB Series

Vertical / Horizontal / Counterflow (Except 60HBQB)
Combo Air Handler

Cooling or Heat Pump / Hot Water Heating
1-1/2 through 5 tons, up to 143,000 BTUH Heating

Description :

The "Combo" air handler converts a properly sized gas or oil-fired water heater into a highly efficient space
heating appliance that can heat your home as well as provide hot water. Compared to other heating systems,
combo heaters offer high efficiency, greater installation flexibility, cost less to install, and are much easier to
service.
The HBQB Series incorporates a Multi-function Micro-processor that not only reduces the number of
components but adds a number of standard system funstions that would not normally be available, such as an
automatic pump timer, and blower delay, just to name a few. The HBQB air handler in th eonly product avail­able with these high quality features! Cooling efficiencies up to 15 SEER.

First Co's customer is ultimately responsible for confirming which fan coil models are compatible
with selected outdoor unit(s) and which expansion valves (if any) are required. To determine certified
indoor/outdoor matches, go to:www.firstco.com or contact the factory

Proper water heater sizing is required to ensure adequate hot water supply for both domestic use and space
heating. Contact the factory for sizing information.

NOW WITH 2-SPEED FAN OPERATION

(High Speed-Cool, Medium Speed-Heat)

FEATURES:
Heating Cycle

1. Automatic pump timer: The pump operatesfor sixty seconds every six hours in order to purge the water

from the hot water coil and piping (the pump timer cycle is skipped while the compressor is operating).
Note: State of MA, .248 CMR code of the state of MA requires a pump timer. (60 seconds every 6 hours)

2. Blower-on delay: On a call for heat, the hot water coil is preheated for 45 seconds before the blower
energizes.

3. Blower-off delay: Blower continues to operate for 20 seconds after thermostat
is satisfied, extracting more heat from the heating coil and increasing heating
performance.

Cooling Cycle

1. Blower-off delay: Blower continues to operate for 45 seconds after thermostat

is satisfied, extracting more cooling from the cooling coil and maximizing cooling
efficiency.

Optional features

board but each option requires an optional field installed switch. (Contact factory)

1. Freeze protection: circuit board has terminals for optional freeze protector switch.
Freeze protector energizes the circulating pump if water coil temperature falls
below 40 degrees.

2. Factory or field installed R22 or R410A TXV's (non-bleed type).

(logic for the following options is built into the micro-processor circuit

Additional features

1. 4-way airflow

2. Built-in circulating pump, air purge valve, and easy access hot water check valve.

3. Blower door safety switch (excep

4. Compatible with all major brands of split condensing units and heat pumps

5. Slide out hot water coil assembly for easier service

6. Fully insulated galvanized steel cabinet

7. High efficiency copper tube/aluminum fin heating and cooling coils

8. Primary and secondary drain connections on cooling coil

9. Factory installed filter

FIRST CO. - P.O. Box 270969 - Dallas, Texas 75227 - Ph. [phone] - Fax [phone] - www.firstco.com

(kit required for counterflow - 60HBQB not approved for counterflow installation)

t 60HBQB)

HBQB Series

COOLING or HEAT PUMP
HOT WATER HEATING

Efficiency:

The HBQB series air handler is the latest state-of-the-art air handler for hot water heating. Depending on the
water heater efficiency and the condensing unit used, heating efficiency can exceed 90% and cooling effi­ciency can exceed 14 SEER (depending on the selected outdoor unit). Cooling coils have either piston type
metering devices or R22 or R410A TXV’s and are circuited for cooling or heat pump operation.

First Co's customer is ultimately responsible for confirming which fan coil models are compatible
with selected outdoor unit(s) and which expansion valves (if any) are required. To determine certified
indoor/outdoor matches, go to: www.firstco.com or contact the factory.

Components:

Each air handler includes a high efficiency cooling coil, a separate hot water coil, circulating pump, air purge
valve, anti-thermosyphon check valve, blower door safety switch (except 60HBQB), 120V blower motor, throw
away filter, and 24V transformer.

Cabinets:

Cabinets are fully insulated and painted with an attractive, baked-on powder coating (light gray).

Installation:

No modification is required for vertical or horizontal (right-to-left) airflow. A horizontal drain pan is factory
installed for right-to-left airflow and can be re-positioned within the cabinet to offer left-to-right airflow. An
optional counterflow conversion kit is available for downflow installations.

Operation:

When space heating is needed, the wall thermostat energizes the circulating pump which circulates hot water
from the water heater to the hot water coil in the air handler. As the blower motor forces cool return air from
the home over the hot water coil, the air absorbs heat from the hot water. This warm air (105 to 110 degrees)
is then circulated throughout the duct system and into the home. The water loses only about 15 degrees of
temperature while it circulates through the coil and is then returned to the water heater to be reheated.

Accessories:

Accessories include counterflow conversion kits, TXV expansion valve kits, and freeze protector.

4-WAY AIRFLOW

-2-

(60 HBQB NOT CONVERTIBLE TO

DOWNFLOW)

(SEE NOTE NEXT TO BLOWER

DATA TABLE)

HBQB Series

(1-1/8 O.D. on 60HBQB)

COOLING or HEAT PUMP
HOT WATER HEATING

COIL

CONNECTIONS

18/24
30/36
48/60

LIQUID

3/8
3/8
1/2

SUCTION

5/8
3/4
7/8

(See P.4 for Model Numbers)

PERFORMANCE DATA

UNIT

MODEL

18HBQB

24HBQB

30HBQB

36HBQB

48HBQB

60HBQB

NOMINAL
COOLING

BTUH

18,000 USM318AP 3-1/2 4.3 24.2 29.1 33.9 53.3

24,000 USM424AP 3-1/2 4.3 25.2 30.3 35.3 55.5

30,000 USM330AP 3-1/2 5.0 31.1 37.4 43.6 68.5

36,000 USM436A 3-1/2 5.0 35.4 42.4 49.5 77.8

42,000/

48,000

60,000 USM460BP 7 8.8 65.0 78.0 91.0 143.0

COIL #

USM348AP 3-1/2 3.4

GPM

(2)

(HTG.)

P.D.

(FT. WTR.)

(1) Use 48HBQB for 3.5 ton applications and field-convert fan motor to low speed.
(2) See “USM” data sheet for additional coil information.

NOTES:

1. Heating output of fan coil will not exceed net output of water heater.

2. Approved for installation with 0” clearance to combustible materials.

3. Heat BTUH is at 70°F entering air temperature.

ELECTRICAL DATA

UNIT

MODEL

18HBQB

24HBQB

30HBQB

36HBQB

48HBQB

60HBQB

MOTOR

HP

(120V)

1/5 2.8 0.57 5 15

1/5 5.1 0.57 7 15

1/5 5.1 0.57 7 15

1/2 8.5 0.57 12 15

3/4 10.7 0.57 14 15

1 11.5 0.75 16 20

MOTOR

AMPS

PUMP

MIN. CIR.

AMPACITY

BTUH (1000) AT ENT.

WATER TEMP.

120oF 130oF 140oF 180oF

45.9

55.0

64.2

49.1

HACR

BREAKER

59.0

MAX.

68.8

100.8

108.1

PHYSICAL DIMENSIONS

UNIT

MODEL

18HBQB
24HBQB

30HBQB
36HBQB

48HBQB

60HBQB

A B C D E F G H

40 20 20 18-1/2 16 2 18 16 18 X 20 X 1

42 23 20 21-1/2 16 2 18 19 20 X 22 X 1

48 28 21-1/4 26-1/4 17-1/4 2 18 24 20 X 25 X 1

52 28 25-1/4 26-1/2 21-1/4 2 22 24

FILTER

SIZE

14 X 24 X 1
(2 required)

BLOWER DATA UPFLOW / HORIZONTAL ONLY DOWNFLOW ONLY

UNIT

MODEL

18HBQB

24HBQB

30HBQB

36HBQB

48HBQB

60HBQB

MOTOR

HP-AMP

(120V)

1/5-2.8

1/5-5.1

1/5-5.1

1/2-8.5

3/4-10.7

1-11.5

MOTOR

SPEED
CONN.

HIGH

MED. HIGH

MED. LOW

LOW

HIGH

MED
LOW

HIGH

MED
LOW

HIGH

MED
LOW

HIGH

MED
LOW

HIGH

MED
LOW

CFM vs. EXTERNAL STATIC PRESSURE

0.05 0.10 0.20 0.30 0.40 0.50 0.05 0.10 0.20 0.30 0.35

810

780

715

650

580

500
680
530
350

950
860
780

1120

850
680

1340
1290
1200

1810
1570
1280

2160
1865
1560

655
505
325

920
835
755

1095

840
670

1310
1260
1170

1780
1550
1260

2125
1840
1540

600
460
325

855
785
705

1045

810
655

1250
1200
1120

1720
1510
1220

2055
1785
1490

545
415
220

790
720
650

995
780
625

1190
1140
1070

1660
1460
1180

1980
1710
1435

490
360
160

720
650
590

940
740
585

1120
1080
1010

1590
1400
1130

1895
1620
1365

420

295

- - -

645

580

510

880

590

510

1050
1000

940

1530
1340
1050

1810
1525
1260

710
640
480
330

760
720
680

1080

885
730

1090
1060
1020

1510
1270
1005

60HBQB is not approved for

-3-

690

630
575
420
260

680
640
600

1010

830
690

1010

980
940

1430
1190

930

570
520
380
220

620
590
550

950
800
660

950
920
890

1380
1150

890

620
460
310

730
690
655

1060

860
720

1070
1030

990

1480
1240

980

downflow conversion

540
490
350
200

590
550
525

920
770
640

925
890
860

1350

NOTE:

1120

860

For downflow applications, select
air handler 1/2 ton larger than the
outdoor unit in order to achieve
nominal airflow.

Model Numbers:

FACTORY INSTALLED TXV’S

MODEL SIZE

(BTU)

18,000 18HBQB 18HBQB w/R22 TXV 18HBQB w/R410A TXV

24,000 24HBQB 24HBQB w/R22 TXV 24HBQB w/R410A TXV

30,000 30HBQB 30HBQB w/R22 TXV 30HBQB w/R410A TXV

36,000 36HBQB 36HBQB w/R22 TXV 36HBQB w/R410A TXV

42,000/48,000 48HBQB 48HBQB w/R22 TXV 48HBQB w/R410A TXV

60,000 60HBQB 60HBQB w/R22 TXV 60HBQB w/R410A TXV

All TXV's are approved for cooling only or heat pump operation (non-bleed type).

NOTE:
Expansion valve requirement depends on the selected outdoor unit. Go to www.firstco.com or contact the factory for

assistance.

MODEL

(PISTON)

MODEL

(R22 TXV)

MODEL

(R410A TXV)

ACCESSORIES - (all field installed)

EXPANSION VALVE KITS
(Field installed) (cooling only or heat pump)

PART NUMBER

R22 FITS

9EVR22-4 18/24HBQB

9EVR22-5 30/36HBQB

9EVR22-6 42-60HBQB

R410A

9EVR410-3 18/24HBQB

9EVR410-4 30/36HBQB

9EVR410-5 42-60HBQB

NOTES:

1. Above expansion valve kits are approved for
both cooling only (non heat pump) and heat
pump applications.

2. Valves are non-bleed type. Field added. Hard
start kit may be required.

3. Valves have screw-on connections.

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.

COUNTERFLOW CONVERSION KITS

FITS KIT NUMBER

18, 24HBQB
30, 36HBQB

48HBQB

919-11
919-12
919-13

Notes:

1. Counterflow conversion not recommended where the
air handler is installed above the finished ceiling.

2. No kit is available for the 60HBQB. This model is

not approved for counterflow installation

MISCELLANEOUS

COMPONENT DESCRIPTION PART NUMBER

Freeze Protector

Thermostat

Energizes pump

when coil temperature

falls below 38

24V Heat/Cool T334

o

F

941-1

Notes:

1. Freeze protector attaches to hot water coil and wires
to low voltage (24V) circuit.

Catalog No. HBQB613 (Replaces HBQB513)

-4-