Designed Specifically For Use With Tankless Water Heaters!
CDXQR Series
Multi-family Cased Celing Fan Coil
1-1/2 - 3 Tons Cooling
Up to 31,400 BTUH HW Heat
The CDXQR series fan coils are designed specifically for use with tankless
water heaters. These fan coils allow high efficiency tankless water heaters
to be used for two jobs instead of one....providing domestic hot water and
high efficiency space heating! They are compatible with most of today's
higher efficiency split-system R-410A heat pumps and condensing units.
Contact the factory or go to www.firstco.com/Efficiency-Ratings for approved
indoor/outdoor combinations.
The space-saving CDXQR is an 11" high cased ceiling fan coil. Its compact
size allows it to recess into a confined ceiling space, thus saving valuable
floor space by eliminating costly furnace/air handler closets.
Important: In order for the CDXQR to operate properly with tankless water
heaters, the hot water coils must be piped to the tankless heaters according
to the tankless manufacturer's instructions. Contact the water heater manufacturer for required accessories and piping requirements, as well as water
heater sizing information.
The CDXQR fan coils include a special circulating pump designed for
tankless heaters, HW check valve, air purge valve, hot water coil, cooling
coil, blower/motor, and multi-function circuit board. The fan coil is factory
installed within an insulated enclosure or "case" and is shipped with your
choice of either a solid or louvered access panel with attractive off-white
powder coat finish. Solid panels must be used with ducted return air applications, while louvered panels (the default style) should be used with
non-ducted return air applications. Louvered panels include filters, but solid
panels require field supplied return-air filter / grilles.
Standard Features:
Insulated Case
(Solid Panel shown)
• Multi-function micro-processor circuit board with:
• Automatic pump timer (heating mode) - pump purges the HW coil for 60 seconds every six hours. Note: State of MA, .248 CMR code of the state of MA
requires a pump timer. (60 seconds every 6 hours)
• Blower-on fan delay (heating mode) - preheats the HW coil for 45 seconds.
• Blower-off fan delay (heating and cooling modes) - blower continues to operate for 45 seconds after
thermostat is satisfied for increased efficiency.
•
Factory installed service switch
•
Freeze protector on HW coil
•
Special circulating pump with unique, easy access anti-siphon check valve and air purge valve
•
120V motor, 24V controls
•
Higher efficiency cooling coil with installed R-410A TXV
(non-bleed type)
•
Insulated and coated galvanized steel drain pan, sloped for proper drainage
•
Attractive off-white louvered or solid return-air / access panel with captive screws (panels can be field painted)
•
Drain pan has 3/4" MPT primary and secondary fittings
•
Effective January 2016, Cabinet air leakage is no more than 2% when tested in accordance with ASHRAE 193. Optional Accessories: (see P. 3)
•
•
Louvered IAQ filter panels with Merv 8 filters
Condensate overflow switch (field installed)
FIRST CO. - P.O. Box 270969 - Dallas, Texas 75227 - Ph. (214) 388-5751 - Fax (214) 388-2255 - www.firstco.com
DRAIN CONNECTIONS PRIMARY
CONNECTIONS AT BOTH ENDS.
SECONDARY CONNECTION AT
THIS END ONLY (3/4” MPT)
CDXQR Series
HW COIL
7/8" O.D. (sweat)
SUPPLY
1-1/2 through 3 tons
HW COIL
7/8" O.D. (sweat)
RETURN
(See P. 3 for Model Numbers)
H
W
C
O
I
L
D
X
6 -1 /2
C
O
I
L
SERVICE SWITCH AND
ELECTRICAL CONNECTIONS
LEFT SIDE (OPPOSITE SIDE SHOWN)
COOLING COIL
LIQUID LINE 3/8 O.D. SWEAT
SUCTION LINE 5/8 O.D. SWEAT 18-30CDXQ
SUCTION LINE 7/8 O.D. SWEAT 31,36 & 37CDXQ
(See P. 3 for Model Numbers)
PHYSICAL DIMENSIONS
UNIT MODEL
A
B
C
D
19CDXQR
45-1/8
37-1/4
30-1/8
34-3/4
20-25CDXQR
51-1/8
43-1/4
36-1/8
40-3/4
26-31CDXQR
57-1/8
49-1/4
42-1/8
46-3/4
32-37CDXQR
64-1/8
56-1/4
49-1/8
53-3/4
BLOWER DATA
UNIT
MODEL
19/20CDXQR
CFM vs. EXTERNAL STATIC PRESSURE (3)
0.05
0.10
0.15
0.20
0.25
0.30
0.35
0.40
710
680
650
620
590
560
530
500
25/26CDXQR
880
840
800
760
720
680
640
600
31CDXQR
1100
1060
1020
980
930
880
830
780
32CDXQR
1160
1130
1095
1060
1025
990
950
910
37CDXQR
1310
1260
1210
1160
1110
1060
1000
940
(1) Units should not be applied to a system with less than 350 CFM/Ton airflow.
(2) Motors are 120V and operate on high speed for cool and low speed for heating.
(3) CFM vs. static at motor cooling speed.
(4) Add .05 static when enclosure and/or ceiling panel are used.
(5) 31, 32, 36 and 37CDXQ have two motors and four blowers.
PERFORMANCE DATA
BTUH (1000) AT ENTERING WATER
TEMPERATURE
NOMINAL
COOLING
BTUH
HEATING
GPM
PRESS.
DROP
(FT. WTR)
120 F
130 F
140 F
180 F
19CDXQR
18,000
3
3.3
12.9
15.4
18.0
28.3
20CDXQR
18,000
3
4.1
13.7
16.5
19.2
30.2
25CDXQR
24,000
3
4.1
15.9
19.0
22.2
34.9
26CDXQR
24,000
3
4.3
17.0
20.4
23.8
37.4
31CDXQR
30,000
3
4.3
18.8
22.5
26.3
41.3
32CDXQR
30,000
3
5.4
20.1
24.2
28.2
44.3
37CDXQR
36,000
3
5.4
21.7
26.1
30.4
47.8
UNIT MODEL
o
o
o
o
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.
NOTES:
1. Heat BTUH is at 70 degree EAT.
2. 120 degree and 180 degree data is supplied for boiler applications.
3. Heating BTUH output will not exceed output of water heater.
4. Approved for installation with 0" clearance to combustible material.
EXPANSION VALVE KITS (Heat Pump or cooling only)
(FIELD INSTALLED)
ELECTRICAL DATA
UNIT
MODEL
MOTOR
HP
(120V)
MOTOR
AMPS (120V)
PUMP
MIN. CIR
AMPACITY
MAX CIR
PROTECTION
19/20CDXQR
1/5
2.3
0.84
4
15
25/26CDXQR
1/4
3.6
0.84
6
15
31CDXQR
1/5 (2)
4.6
0.84
7
15
32CDXQR
1/5 (2)
4.6
0.84
7
15
37CDXQR
1/5 (2)
4.6
0.84
7
15
PART NO.
TYPE
FOR
9EVR410-1
R410A
19 - 37CDXQR (1-1/2 - 3 TON)
NOTES:
1.Above expansion valve kits are approved for both cooling
only (non heat pump) or heat pump applications.
2.Valves are non-bleed type. Field added. Hard start kit may be required.
3.Valves have screw-on connections.
-2-
CDXQR Series
1-1/2 through 3 tons
PHYSICAL DIMENSIONS
MODEL
A
B
45-3/4
30-7/8
34
20/25CDXQR
51-3/4
36-7/8
40
32/37CDXQR
58-1/2
66-1/2
PANEL
NO.
(IAQ)
DESCRIPTION
(1)
W
L
W
L
966
966-M8
LOUVERED
24-1/2
46
27-1/2
49
966-1
NA
NON-LOUVERED
24-1/2
46
27-1/2
49
C
19CDXQR
26/31CDXQR
PANEL
NO.
(STD.)
42-7/8
46-3/4
49-7/8
54-3/4
CEILING PANEL
OPENING
PANEL FRAME
DIMS (OUTSIDE)
967
967-M8
LOUVERED
24-1/2
52-1/2
27-1/2
55-1/2
967-1
NA
NON-LOUVERED
24-1/2
52-1/2
27-1/2
55-1/2
967-6
967-6-M8
LOUVERED
24-1/2
60
27-1/2
63
967-7
NA
NON-LOUVERED
24-1/2
60
27-1/2
63
967-8
967-8-M8
LOUVERED
24-1/2
67
27-1/2
70
967-5
NA
NON-LOUVERED
24-1/2
67
27-1/2
70
(See Panel Pictures Below)
NOTES:
(1) Louvered is the "default" style and automatically shipped unless non-louvered is specified on order.
7"
6 7/8"
2 7/8"
11"
5 7/8"
23 7/8"
5 1/2"
B
A
2 1/2"
2"
C
TEMPLETE FOR DUCTED RETURN
(Ducted return requires remote filter grille
(field supplied) and non-louvered panel)
STANDARD PANELS
# 966-1,
967-1, 967-7
# 966, 967, 967-6
(Louvers may differ from picture)
Louvered panels accept 20x20x1" filter
(field supplied)
IAQ PANELS
# 966-M8, 967-M8 (accepts 2-20x20x1 filter)
# 967-6-M8 (accepts 2-20x25x1 filter)
# 967-8-M8 (accepts 2-20x30x1 filter)
(GlasFloss ® Industries Series
HV filter or equivalent is recommended)
MODEL NUMBERS:
MODEL SIZE
(BTUH CLG.)
MODEL NUMBER
18,000
19/20CDXQR R410 TXV
24,000
25/26CDXQR R410 TXV
30,000
31/32CDXQR R410 TXV
36,000
37CDXQR R410 TXV
NOTES:
(1) TXV's are approved for cooling or heat pump operation
(2) TXV's are non-bleed type. A field installed hard start kit may be required.
Catalog No. CDXQR116_UNIV (replaces cdxqr715_univ) -3-