MBQ Series - First Co.
MBQ Series - First Co.
MBQ Series - First Co.
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<strong>MBQ</strong> <strong>Series</strong><br />
Vertical / Horizontal / <strong>Co</strong>unterflow<br />
<strong>Co</strong>mbo Air Handler<br />
Heat Pump or DX <strong>Co</strong>oling / Hot Water Heating<br />
1-1/2 through 5 tons, up to 91,000 BTUH Heating<br />
Description :<br />
This "combo" air handler converts a properly sized gas or oil-fired water heater into a highly efficient space heating<br />
appliance that can heat your home as well as provide domestic hot water. <strong>Co</strong>mbo space heating is quickly<br />
becoming the most popular heating system for today's educated consumer. <strong>Co</strong>mpared to other heating systems,<br />
combo heaters offer higher efficiency, greater installation flexibility, cost less to install and are much simpler<br />
to service.<br />
Proper water heater sizing is required to insure adequate hot water supply and space heating. <strong>Co</strong>ntact the factory<br />
for sizing information.<br />
Now with 2 - speed Fan Operation!!<br />
(High Speed - <strong>Co</strong>ol, Medium Speed - Heat)<br />
FEATURES:<br />
1. 4-way airflow (kit required for counterflow)<br />
(60<strong>MBQ</strong> not approved for counterflow<br />
installation.)<br />
2. Built-in circulating pump, air purge valve,<br />
and anti-thermosiphon check valve<br />
3. <strong>Co</strong>mpatible with all major brands of split condensing<br />
units and heat pumps<br />
4. <strong>Co</strong>mpatible with all properly sized gas or oilfired<br />
water heaters<br />
5. Slide out hot water coil assembly for easier<br />
service<br />
6. Flue gas safety switch (except 60<strong>MBQ</strong>)<br />
7. Piston-type metering device on cooling coil<br />
8. Factory installed filter<br />
9. Fully insulated and painted galvanized steel<br />
cabinet<br />
10. <strong>Co</strong>pper tube heating and cooling coils<br />
11. Primary and secondary drain connections<br />
on cooling coil<br />
Table of <strong>Co</strong>ntents<br />
Page #<br />
Description ................................................. 1<br />
Features ..................................................... 1<br />
Efficiency .................................................... 2<br />
<strong>Co</strong>mponents ............................................... 2<br />
Installation/Operation .................................. 2<br />
Accessories ................................................ 2,4<br />
Physical Dimensions .................................. 3<br />
Performance Data ...................................... 3<br />
Blower Data ................................................ 3<br />
FIRST CO. - P.O. BOX 270969 - DALLAS, TEXAS 75227 - Ph. (214) 388-5751 - Fax (214) 388-2255 - www.firstco.com
<strong>MBQ</strong> <strong>Series</strong><br />
DX COOLING<br />
HOT WATER HEATING<br />
Efficiency:<br />
The <strong>MBQ</strong> series air handler is the latest state-of-the-art air handler for hot water heating. Depending on the water<br />
heater efficiency and the condensing unit used, heating efficiency can exceed 90% and cooling efficiency can<br />
exceed 12.0 SEER. <strong>Co</strong>oling coils are also circuited for heat pump operation.<br />
<strong>Co</strong>mponents:<br />
Each air handler includes a high efficiency cooling coil, a separate hot water coil, circulating pump, air purge valve,<br />
anti-thermosyphon check valve, flue gas safety switch (except 60<strong>MBQ</strong>), 120V fan motor, throwaway filter, and 24V<br />
transformer.<br />
Cabinets:<br />
Cabinets are fully insulated and painted with an attractive, baked-on powder coating (light gray).<br />
Installation:<br />
No modification is required for vertical or horizontal (right-to-left) airflow. A horizontal drain pan is factory installed<br />
for right-to-left airflow and can be re-positioned within the cabinet to offer left-to-right airflow. An optional<br />
counterflow conversion kit is available for downflow installations.<br />
Operation:<br />
When space heating is needed, the wall thermostat energizes the circulating pump which circulates hot water from<br />
the water heater to the hot water coil in the air handler. As the fan motor forces cool return air from the home over<br />
the hot water coil, the air absorbs heat from the hot water. This warm air (105 to 110 degrees) is then circulated<br />
throughout the duct system and into the home. The water loses only about 15 degrees of temperature while it<br />
circulates through the coil and is then returned to the water heater to be reheated.<br />
Accessories:<br />
Accessories include counterflow conversion kits, DX expansion valve kits, heat pump expansion valve kits, pump<br />
timer, and freeze protector.<br />
4-WAY AIRFLOW<br />
(60<strong>MBQ</strong> NOT CONVERTIBLE<br />
TO DOWN FLOW)<br />
- 2 -
<strong>MBQ</strong> <strong>Series</strong><br />
DX COOLING<br />
HOT WATER HEATING<br />
Easy<br />
Access<br />
Check<br />
Valve<br />
COIL CONNECTIONS<br />
UNIT<br />
SIZE<br />
LIQUID<br />
SUCTION<br />
18/24<br />
3/<br />
8 5/ 8<br />
30/36<br />
3/<br />
8 3/ 4<br />
48/60<br />
1/<br />
2 7/ 8<br />
PHYSICAL DIMENSIONS<br />
UNIT<br />
MODEL<br />
18<strong>MBQ</strong><br />
24<strong>MBQ</strong><br />
30<strong>MBQ</strong><br />
36<strong>MBQ</strong><br />
A B C D E F G H<br />
FILTER<br />
SIZE<br />
40<br />
20<br />
20<br />
18-1/<br />
2 16<br />
2 18<br />
16<br />
18 X 20 X 1<br />
42<br />
23<br />
20<br />
21-1/<br />
2 16<br />
2 18<br />
19<br />
20 X 22 X 1<br />
48<strong>MBQ</strong><br />
48<br />
28<br />
21-1/<br />
4 26-1/<br />
4 17-1/<br />
4 2 18<br />
24<br />
20 X 25 X 1<br />
60<strong>MBQ</strong><br />
52<br />
28<br />
25-1/<br />
4 26-1/<br />
2 21-1/<br />
4 2 22<br />
24<br />
BLOWER DATA<br />
UNIT<br />
MODEL<br />
MOTOR<br />
HP-AMPS<br />
(120V)<br />
18<strong>MBQ</strong><br />
1/5-2. 8<br />
24<strong>MBQ</strong><br />
1/5-5. 1<br />
30<strong>MBQ</strong><br />
1/5-5. 1<br />
36<strong>MBQ</strong><br />
1/2-8. 5<br />
48<strong>MBQ</strong><br />
3/4-10. 7<br />
60<strong>MBQ</strong><br />
1-11. 5<br />
MOTOR<br />
SPEED<br />
CONN.<br />
HIGH<br />
MED.<br />
MED. LOW<br />
LOW<br />
HIGH<br />
MED.<br />
LOW<br />
HIGH<br />
MED.<br />
LOW<br />
HIGH<br />
MED.<br />
LOW<br />
HIGH<br />
MED.<br />
LOW<br />
HIGH<br />
MED.<br />
LOW<br />
20 X 24 X 1<br />
(2 required)<br />
CFM vs. EXTERNAL STATIC<br />
PRESSURE<br />
0.05<br />
0.10<br />
0.20<br />
0.30<br />
0.40<br />
0.50<br />
810<br />
680<br />
530<br />
350<br />
950<br />
960<br />
780<br />
1120<br />
850<br />
680<br />
1340<br />
1290<br />
1200<br />
1810<br />
1570<br />
1280<br />
2160<br />
1865<br />
1560<br />
780<br />
655<br />
505<br />
325<br />
920<br />
835<br />
755<br />
1095<br />
840<br />
670<br />
1310<br />
1260<br />
1170<br />
1780<br />
1550<br />
1260<br />
2125<br />
1840<br />
1540<br />
715<br />
600<br />
460<br />
270<br />
855<br />
785<br />
705<br />
1045<br />
810<br />
655<br />
1250<br />
1200<br />
1120<br />
1720<br />
1510<br />
1220<br />
2055<br />
1785<br />
1490<br />
650<br />
545<br />
415<br />
220<br />
790<br />
720<br />
650<br />
995<br />
780<br />
625<br />
1190<br />
1140<br />
1070<br />
1660<br />
1460<br />
1180<br />
1980<br />
1710<br />
1435<br />
580<br />
490<br />
360<br />
160<br />
720<br />
650<br />
590<br />
940<br />
740<br />
585<br />
1120<br />
1080<br />
1010<br />
1590<br />
1400<br />
1130<br />
1895<br />
1620<br />
1365<br />
500<br />
420<br />
295<br />
- - -<br />
645<br />
580<br />
510<br />
880<br />
690<br />
510<br />
1050<br />
1000<br />
940<br />
1530<br />
1340<br />
1050<br />
1810<br />
1525<br />
1260<br />
PERFORMANCE DATA<br />
UNIT<br />
MODEL<br />
NOMINAL<br />
COOLING<br />
BTUH<br />
COIL #<br />
(2)<br />
GPM<br />
(HTG.)<br />
P.D.<br />
(FT. WTR.)<br />
BTUH (1000) AT<br />
ENTERING<br />
WATER TEMPERATURE<br />
120°F<br />
130°<br />
F 140°<br />
F 180° F<br />
18<strong>MBQ</strong>-2<br />
18,000<br />
USM318AP<br />
3-1/<br />
2 3.<br />
3 19.<br />
0 22.<br />
8 26.<br />
6 41. 8<br />
18<strong>MBQ</strong>-3<br />
18,000<br />
USM318AP<br />
3-1/<br />
2 4.<br />
3 24.<br />
2 29.<br />
1 33.<br />
9 53. 3<br />
24<strong>MBQ</strong>-2<br />
24,000<br />
USM424AP<br />
3-1/<br />
2 3.<br />
3 19.<br />
7 23.<br />
7 27.<br />
6 43. 4<br />
24<strong>MBQ</strong>-3<br />
24,000<br />
USM424AP<br />
3-1/<br />
2 4.<br />
3 25.<br />
2 30.<br />
3 35.<br />
3 55. 5<br />
30<strong>MBQ</strong>-2<br />
30,000<br />
USM330AP<br />
3-1/<br />
2 4.<br />
0 23.<br />
7 28.<br />
5 33.<br />
2 52. 2<br />
30<strong>MBQ</strong>-3<br />
30,000<br />
USM330AP<br />
3-1/<br />
2 5.<br />
0 31.<br />
1 37.<br />
4 43.<br />
6 68. 5<br />
36<strong>MBQ</strong>-2<br />
36,000<br />
USM436AP<br />
3-1/<br />
2 4.<br />
0 26.<br />
5 31.<br />
8 37.<br />
1 58. 3<br />
36<strong>MBQ</strong>-3<br />
36,000<br />
USM436AP<br />
3-1/<br />
2 5.<br />
0 35.<br />
4 42.<br />
4 49.<br />
5 77. 8<br />
48<strong>MBQ</strong>-3 (1)<br />
48<strong>MBQ</strong>-4 (1)<br />
42,000/<br />
48,000<br />
42,000/<br />
48,000<br />
USM348AP<br />
3-1/<br />
2 2. 1<br />
USM348AP<br />
3-1/<br />
2 3. 4<br />
39.9<br />
42.4<br />
45.9<br />
49.1<br />
47.8<br />
50.8<br />
55.0<br />
59.0<br />
(1) Use 48<strong>MBQ</strong> for 3.5 ton applications and field-convert fan motor to low speed.<br />
(2) See "USM" data sheet for additional coil information.<br />
55.8<br />
59.3<br />
64.2<br />
68.8<br />
87.7<br />
93.2<br />
100.8<br />
108.1<br />
60<strong>MBQ</strong>-3<br />
60,000<br />
USM460AP<br />
7 7.<br />
6 57.<br />
7 69.<br />
3 80.<br />
8 127. 0<br />
60<strong>MBQ</strong>-4<br />
60,000<br />
USM460BP<br />
7 8.<br />
8 65.<br />
0 78.<br />
0 91.<br />
0 143. 0<br />
NOTES:<br />
1. Heating output of fan coil will not exceed net output of water heater.<br />
2. Approved for installation with 0" clearance to combustible materials.<br />
3. Heat BTUH is at 70 degree entering air temperature.<br />
ELECTRICAL DATA<br />
UNIT<br />
MODEL<br />
MOTOR<br />
HP<br />
(120V)<br />
A MPS MIN. CIR .<br />
PUMP<br />
AMPACITY<br />
MOTOR<br />
MAX<br />
HACR<br />
BREAKER<br />
18<strong>MBQ</strong><br />
1/<br />
5 2.<br />
8 0.57<br />
5 15<br />
24<strong>MBQ</strong><br />
1/<br />
5 5.<br />
1 0.57<br />
7 15<br />
30<strong>MBQ</strong><br />
1/<br />
5 5.<br />
1 0.57<br />
7 15<br />
36<strong>MBQ</strong><br />
1/<br />
2 8.<br />
5 0.57<br />
12<br />
15<br />
48<strong>MBQ</strong><br />
3/<br />
4 10.<br />
7 0.57<br />
14<br />
15<br />
60<strong>MBQ</strong><br />
1 11.<br />
5 0.75<br />
16<br />
20<br />
- 3 -
ACCESSORIES - (all field installed)<br />
EXPANSION VALVE KITS<br />
TYPE<br />
DX<br />
(Straight <strong>Co</strong>ol)<br />
HEAT PUMP<br />
FITS<br />
18, 24<strong>MBQ</strong><br />
30, 36<strong>MBQ</strong><br />
48<strong>MBQ</strong><br />
60<strong>MBQ</strong><br />
18, 24<strong>MBQ</strong><br />
30, 36<strong>MBQ</strong><br />
48, 60<strong>MBQ</strong><br />
KIT NUMBER<br />
978-5<br />
978-6<br />
978-7<br />
978-8<br />
978-5HP<br />
978-6HP<br />
978-7HP<br />
Notes:<br />
1. Valves mount inside air handler cabinet.<br />
2. Valves are externally equalizing, internal bleed type.<br />
3. Heat Pump valves check internally.<br />
COUNTERFLOW CONVERSION KITS<br />
FITS<br />
KIT NUMBER<br />
18, 24<strong>MBQ</strong><br />
919-11<br />
30, 36<strong>MBQ</strong><br />
919-12<br />
48<strong>MBQ</strong><br />
919-13<br />
Notes:<br />
1. <strong>Co</strong>unterflow conversion not recommended where<br />
the air handler is installed above a finished ceiling.<br />
2. No kit available for 60<strong>MBQ</strong>. This model is not approved<br />
for counterflow installation.<br />
MISCELLANEOUS<br />
COMPONENT<br />
Freeze Protector<br />
Pump Timer<br />
Thermostat<br />
DESCRIPTION<br />
Energizes pump when<br />
coil temperature falls<br />
below 38°F<br />
Energizes pump for 30<br />
seconds every 6 hours<br />
PART NUMBER<br />
941-1<br />
E1242<br />
24V Heat/<strong>Co</strong>ol<br />
T334<br />
Notes:<br />
1. Freeze protector attaches to hot water coil and<br />
wires to low voltage (24V) circuit.<br />
2. Pump timer is low voltage (24V).<br />
"In keeping with its policy of continuous progress and<br />
product improvement, <strong>First</strong> <strong>Co</strong>. reserves the right to make<br />
changes without notice."<br />
Catalog No. <strong>MBQ</strong>1000 (Replaces <strong>MBQ</strong>100)<br />
- 4 -
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