First Co USM Series Uncased Coil Heat Pump or Cooling Only User Guide
- July 12, 2024
- First Co
Table of Contents
First Co USM Series Uncased Coil Heat Pump or Cooling Only
Specifications
- Product Name: USM Series Vertical/Horizontal Uncased Coil
- Compatibility: Heat Pump or Cooling Only
- Tonnage Range: 1-1/2 thru 5 Tons
- Refrigerant Options: R-22 or R-410A
- Primary Material: Copper tube, aluminum fin coil
- Condensate Drain Connections: 3/4 MPT primary and secondary
Product Usage Instructions
Installation
The USM series coil can be field installed into an air handler with
sufficient space. Ensure compatibility with selected outdoor unit(s) and
determine the need for expansion valves.
Features
- Compatible with up to 14 SEER condensing units
- High efficiency copper tube, aluminum fin coil with piston type metering device
- Coils are circuited for cooling only or heat pump operation
- Sweat refrigerant connections
- Factory installed equalizer connection on coil header for expansion valve kits
Maintenance
For maintenance and product improvement information, visit
www.firstco.com.
FAQ
-
Q: Are horizontal drain pans included with the coil?
A: Horizontal drain pans are optional and must be ordered separately. -
Q: Which expansion valve kit should I use for my specific model?
A: Refer to the PART NO. mentioned in the manual for the appropriate expansion valve kit based on your model. -
Q: Can I use this coil for both heat pump and cooling-only applications?
A: Yes, the coil is suitable for both heat pump and cooling-only applications. Ensure to install the correct expansion valve kit.
USM Series
VERTICAL / HORIZONTAL UNCASED COIL
HEAT PUMP or Cooling Only
1-1/2 thru 5 TONS
Description
The USM series coil can be field installed into an air handler with sufficient space. A pis-ton-type metering device is utilized for maximum flexibility. Optional R-22 or R-410A field installed TXV kits are available. 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 match-es, go to: www.firstco.com or contact the factory.
HORIZONTAL DRAIN PANS ARE OPTIONAL AND MUST BE ORDERED SEPARATELY
FEATURES
- For use with up to 14 SEER condensing units.
- High efficiency copper tube, aluminum fin coil with piston type metering device
- Coils are circuited for cooling only or heat pump operation
- Sweat refrigerant connections
- 3/4″ MPT primary and secondary condensate drain connections
- Factory installed equalizer connection on coil header to facilitate field installation of expansion valve kits
- Coil drain pan is coated for corrosion resistance
USM Series
Evaporator Coils
PHYSICAL DIMENSIONS
MODEL NUMBER| NOMINAL TONNAGE RANGE|
A
|
B
|
C
|
D
|
E
|
F
|
G
| LIQ. X SUCT. LINE OD SWT| FITS CABINET
USM318AP| 1.5| 12-3/4| 18-1/2| 19-1/4| 3-1/2| 3-3/8| 3| 8| 3/8 X 5/8| 20
X 20
USM424AP| 1.5 – 2.0| 12-3/4| 18-1/2| 19-1/4| 3-1/2| 3-3/8| 3| 8| 3/8 X
5/8| 20 X 20
USM330AP| 2.0 – 2.5| 13-3/4| 18-1/2| 22-1/4| 3-1/2| 3-3/8| 3| 8| 3/8 X
3/4| 20 X 23
USM436AP| 2.5 – 3.0| 15| 18-1/2| 22-1/4| 3-1/2| 3-3/8| 3| 8| 3/8 X 3/4|
20 X 23
USM348AP| 3.5 – 4.0| 18-1/2| 19-3/4| 27| 5-1/2| 3-3/4| 4| 8-5/8| 1/2 X
7/8| 21-1/2 X 28
USM460AP| 4.0 – 5.0| 18-1/2| 19-3/4| 27| 5-1/2| 3-3/4| 4| 8-5/8| 1/2 X
7/8| 21-1/4 X 28
USM460BP| 4.0 – 5.0| 18-1/2| 23-1/4| 27| 5| 3-3/4| 6| 10-3/8| 1/2 X 7/8|
25-1/4 X 28
Notes:
(1) Condensate drains are 3/4″ MPT
HORIZONTAL DRAIN PANS
(For First Co. air handlers only – field installed)
PART NUMBER| FITS FIRST CO. AIR HANDLER MODEL NUMBER
360-58|
- 18XHBQB/XHBXB-HW/XMBX
- 24XHBQB/XHBXB-HW/XMBX
360-60|
- 30XHBQB/XHBXB-HW/XMBX
- 36XHBQB/XHBXB-HW/XMBX
360-62| 48XHBQB/XHBXB-HW/XMBX/60XMBX
360-62| 60XHBQB/XHBXB-HW
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.
EXPANSION VALVE KITS (Heat Pump or cooling only) (FIELD INSTALLED)
PART NO.| TYPE| FOR
9EVR22-4| R-22| USM318AP / USM424AP
9EVR22-5| R-22| USM330AP / USM436AP
9EVR22-6| R-22| USM348AP / USM460AP / USM460BP
9EVR410-3| R-410A| USM318AP / USM424AP
9EVR410-4| R-410A| USM330AP / USM436AP
9EVR410-5| R-410A| USM348AP / USM460AP / USM460BP
WARNING
Cancer and Reproductive
www.P65Warnings.ca.gov LBY0057
NOTES
- Above expansion valve kits are approved for both cooling only (non heat pump) or heat pump applications.
- Valves are non-bleed type. Field added. Hard start kit may be required.
- Valves mount inside unit cabinet
Catalog No. USM718 (Replaces USM613)
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