Multiaqua MHNCCX Series User manual

318
4-Pipe Heat / Cool Fan Coil 12,000 - 36,000 BTUH
Ceiling Concealed
MHNCCX DX with Hot Water Heat

Voltage
10 = 2.5 Ton
12 = 3 Ton
319
04 = 1 Ton
06 = 1.5 Ton
08 = 2 Ton
MHNCCX-06-03
MHNCCX-08-03
MHNCCX-10-03
MHNCCX-12-03
MHNCCW- XX - XX
MHNCCX-04-01 MHNCCX-04-03
Nominal Tons
01= 208/230-1-50/60
03= 120-1-50/60
Ceiling Concealed
4-Pipe DX Cool/HW Heat
MHNCCX-10-01
MHNCCX NOMENCLATURE BREAKDOWN
4-Pipe Heat/Cool Ceiling Concealed Fan Coil
MHNCCX-12-01
MHNCCX-06-01
MHNCCX-08-01
Available Model Numbers

HVAC Guide Specifications
Direct Expansion and Hot Water Fan Coil
4-Pipe
Nominal Size:
12,000 – 36,000 BTUH
Multiaqua Model Number:
MHNCCX04
MHNCCX06
MHNCCX08
MHNCCX10
MHNCCX12
Part 1-General
1.01System Description
Multiaqua DX and Chilled Water Fan Coils are manufactured with heavy gauge galvanized steel to resist
corrosion.
1.02Quality Assurance
A. Certified in accordance with U.L. Standard 95, latest version (U.S.A.)
B. Manufactured in a facility registered to ISO 9002, Manufacturing Quality Standard.
C. Fully load tested at the factory.
D. Damage resistant packaging.
1.03Delivery, Storage and Handling
A. Packaged and readied for shipment from the factory.
B. Controls shall be capable of withstanding 150°F storage temperatures in the control compartment.
C. Stored and handled per manufacturer’s recommendations.
Part 2-Product
2.01 Equipment
A. General:
1. Unit shall be a factory assembled and tested DX and hot water fan coil.
2. Shall be assembled with heavy gauge galvanized steel.
3. Contained with the unit shall be all factory wiring, piping, associated controls and special
accessories required prior to start up.
B. Unit Cabinet:
1. Composed of heavy gauge galvanized steel casing with a baked polyester powder.
2. Shall be internally insulated to insure quiet operation.
C. Fan Motors:
1. Shall be available in 115-1-50/60 and 208/230-1-50/60 vac.
1. Fan motors shall be three speed, direct drive, and PSC type.
2. Totally enclosed.
3. Internal overload protected.
D. Blower Wheels:
1. Blower wheels are forward curved and dynamically balanced.
E. Water Coil:
1. Manufactured with water coils containing 3/8” copper tubing mechanically bonded to aluminum
fins.
2. Contain both a manual water drain and manual air bleed port per coil.
3. Coils shall be factory tested to 350 psig.
4. Coils shall be capable of being field converted from right to left hand connection.
F. Direct Expansion Coil:
1. Manufactured with water coils containing 3/8” copper tubing mechanically bonded to aluminum
fins.
2. Will contain a thermal expansion valve.
3. Coils shall be tested to 350 psig.
4. Coils shall be capable of being field converted from right to left hand connection.
320

G. Drain Pan:
a. All drain pans shall be coated on both the interior and exterior with baked polyester powder to
resist corrosion.
b. The exterior of all drain pans shall be insulated with closed cell to prevent condensation.
c. Pans shall contain a left and right hand primary sloped drain connection as well as a sloped right
hand secondary drain connection.
Part 3-Controls and Safeties
3.01 Controls
A. Fan coils shall be completely factory wired and tested.
B. All components shall be wired to an internal terminal block to allow for a field installed thermostat and or
fan speed control.
C. Controls shall include the following components.
1. 24vac transformer.
2. Fan relays.
3. Optional thermostats.
3.02 Safeties:
A. Fan coil shall contain a non reusable fuse on the secondary voltage side of the transformer.
Part 4-Operating Characteristics:
4.01 Electrical Requirements
A. Primary electrical power supply shall enter the unit at a single location.
B. Electrical power supply shall be rated to withstand 120°F operating ambient temperatures.
D. Control and high voltage points shall be accessed through terminal block.
Part 5- Accessories:
5.01 Enclosures
A. Fan coils shall be capable of incorporating enclosures.
1. Enclosures shall be internally insulated to insure quite operation and increase efficiency.
2. Shall include knockouts for ease of piping/ electrical in and out of the enclosures.
3. Shall include an optional return air cutout in the enclosure.
4. Shall include a supply air duct flange.
5. Shall incorporate baked polyester powder service access panels with and without a filter louver.
321

322
MHNCCX Product Specifications
Physical Data
Model Number Height
(in) Length (in) Depth (in) Weight (lbs)
DX
Rows
FPI
H/W
Rows
FPI
Copper
Diameter
(in)
Liquid
Line
(in)
Suction
Line
(in)
Water
Inlet
(in)
Water
Outlet
(in)
Drain
(in)
MHNCCX04-01(03) 10 37.72 21.65 66.0 2-14 2-14 3/8 3/8 1/2 5/8 5/8 3/4
MHNCCX06-01(03) 10 37.72 21.65 68.2 3-14 2-14 3/8 3/8 5/8 5/8 5/8 3/4
MHNCCX08-01(03) 10 37.72 21.65 72.6 4-14 2-14 3/8 3/8 5/8 5/8 5/8 3/4
MHNCCX10-01(03) 10 43.7 21.65 74.8 4-14 2-14 3/8 3/8 5/8 7/8 7/8 3/4
MHNCCX12-01(03) 10 49.68 21.65 83.6 4-14 2-14 3/8 3/8 5/8 7/8 7/8 3/4
These specifications are subject to change without notice.
Electrical Data
Fuse or HACR
Circuit Breaker
Per Circuit
Model Number Nominal
CFM Volts/ Phase/ Hertz Motor HP Full Load Ampacity Minimum
Amps Maximum Amps
MHNCCX04-01 208/230-1-50/60 1/8 0.82 1.03 2
MHNCCX04-03 400 120-1-60 1/30
0.55 .69 2
MHNCCX06-01 208/230-1-50/60 1/8 1.18 1.48 3
MHNCCX06-03 600 120-1-60 1/30 0.55 .69 2
MHNCCX08-01 208/230-1-50/60 1/4 1.43 1.79 4
MHNCCX08-03 800 120-1-60 1/30 0.55 .69 2
MHNCCX10-01 208/230-1-50/60 1/4 1.63 2.04 4
MHNCCX10-03 1000 120-1-60 1/8
1.80 2.25 4
MHNCCX12-01 208/230-1-50/60 1/4 1.81 2.26 4
MHNCCX12-03 1200 120-1-60 1/4 3.00 3.75 7

323
MHCCX DX Cooling Performance Data,
CFM vs. ESP and Glycol Adjustment
Model
Number Nominal CFM
Nominal
Cooling
BTUH
MHNCCX04-01 400 12,000
MHNCCX04-03 400 12,000
MHNCCX06-01 600 18,000
MHNCCX06-03 600 18,000
MHNCCX08-01 800 24,000
MHNCCX08-03 800 24,000
MHNCCX10-01 1,000 30,000
MHNCCX10-03 1,000 30,000
MHNCCX12-01 1,200 36,000
MHNCCX12-01 1,200 36,000
* Cooling based on 75 % Sensible and 25% Latent:
*Fan coils are 13 SEER
CFM vs. External Static Pressure Table
External Static Pressure
Model Number 0.05 0.10 0.15 0.20 0.25 0.30
MHNCCX04 397 373 340 320 0 0
MHNCCX06 634 608 578 544 506 463
MHNCCX08 757 723 700 659 621 582
MHNCCX10 943 914 880 846 812 769
MHNCCX12 1228 1194 1160 1126 1088 1050
Propylene Glycol/GPM Adjustment Factors
Ambient Propylene GPM Adjustment
Temp Glycol %
Capacity
Reduction = 100% Capacity
26° F 10% x 0.99 x 1.01
20° F 20% x 0.98 x 1.03
8° F 30% x 0.98 x 1.07
-5° F 40% x 0.97 x 1.11
-28° F 50% x 0.96 x 1.16
These specifications are subject to change without notice.

324
MHNCCX Heating Capacity Adjustment Factors
HOT WATER CAPACITY CORRECTION FACTORS
MODEL # MHNCCX04 MHNCCX06 MHNCCX08 MHNCCX10 MHNCCX12
CFM TC SC TC SC TC SC TC SC TC SC
320 0.88 0.86
350 0.90 0.89
375 0.94 0.93
400 1.00 1.00
425
460
500 0.93 0.92
525 0.95 0.94
550 0.98 0.97
580 1.01 1.02 0.91 0.90
600 1.02 1.03 0.92 0.93
630 1.03 1.04 0.94 0.94
650 0.96 0.97
675 0.98 0.99
700 0.99 0.99
750 1.00 1.00 0.93 0.92
775 0.95 0.93
800 0.96 0.95
850 0.97 0.96
900 0.99 0.98
950 1.00 1.00
1000
1025
1050 0.93 0.93
1100 0.96 0.95
1125 0.97 0.96
1150 0.99 0.98
1200 1.01 1.02
1225 1.03 1.04
These specifications are subject to change without notice.

325
MHNCCX Hot Water Performance Data
MHNCCX-04 HEATING CAPACITIES
ENTERING WATER TEMPERATURE (°F)
ENTERING
AIR (°F) NOMINAL CFM GPM WPD 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200°
1.0 1.0 11.2 13.8 16.4 19.0 21.6 24.2 26.8 29.4 32.0 34.6 37.2
2.0 3.4 13.4 16.0 18.6 21.2 23.8 26.4 29.0 31.6 34.2 36.8 39.4
50 400
3.0 7.0 14.8 17.4 20.0 22.6 25.2 27.8 30.4 33.0 35.6 38.2 40.8
MHNCCX-04 HEATING CAPACITIES
ENTERING WATER TEMPERATURE (°F)
ENTERING
AIR (°F) NOMINAL CFM GPM WPD 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200°
1.0 1.0 8.4 11.0 13.6 16.2 18.8 21.4 24.0 26.7 29.4 32.1 34.8
2.0 3.4 10.6 13.3 16.0 18.7 21.4 24.1 26.8 29.5 32.2 34.9 37.6
60 400
3.0 7.0 12.0 14.7 17.4 20.1 22.8 25.5 28.2 30.9 33.6 36.3 39.0
MHNCCX-04 HEATING CAPACITIES
ENTERING WATER TEMPERATURE (°F)
ENTERING
AIR (°F) NOMINAL CFM GPM WPD 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200°
1.0 1.0 5.8 8.4 11.0 13.6 15.5 18.1 20.0 22.6 24.5 27.1 29.7
2.0 3.4 7.9 10.6 13.4 16.1 18.9 21.6 24.4 27.1 29.9 32.6 35.3
70 400
3.0 7.0 8.8 11.6 14.4 17.3 20.2 23.0 26.1 28.9 32.0 34.9 37.8
MHNCCX-04 HEATING CAPACITIES
ENTERING WATER TEMPERATURE (°F)
ENTERING
AIR (°F) NOMINAL CFM GPM WPD 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200°
1.0 1.0 8.4 5.8 8.4 11.0 12.9 15.5 17.4 20.0 21.9 24.5 27.1
2.0 3.4 10.5 8.0 10.8 13.5 16.3 19.0 21.8 24.5 27.3 30.0 32.7
80 400
3.0 7.0 12.1 9.0 11.8 14.7 17.6 20.4 23.5 26.3 29.4 32.3 35.2
These specifications are subject to change without notice.

326
MHNCCX Hot Water Performance Data
MHNCCX-06 HEATING CAPACITIES
ENTERING WATER TEMPERATURE (°F)
ENTERING
AIR (°F) NOMINAL CFM GPM WPD 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200°
1.0 1.1 13.1 17.6 22.1 26.6 31.1 35.6 40.1 44.6 49.1 53.6 58.1
2.0 3.7 17.5 21.7 25.9 30.1 34.3 38.5 42.7 46.9 51.1 55.3 59.5
50 600
3.0 7.6 19.1 23.3 27.5 31.7 35.9 40.1 44.3 48.5 52.7 56.9 61.4
MHNCCX-06 HEATING CAPACITIES
ENTERING WATER TEMPERATURE (°F)
ENTERING
AIR (°F) NOMINAL CFM GPM WPD 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200°
1.0 1.1 12.8 15.4 18.0 20.6 23.2 25.8 28.4 31.0 33.6 36.2 38.8
2.0 3.7 16.2 18.8 21.4 24.0 26.6 29.2 31.8 34.4 37.0 39.6 42.2
60 600
3.0 7.6 17.8 20.4 23.0 25.6 28.2 30.8 33.4 36.0 38.6 41.2 43.8
MHNCCX-06 HEATING CAPACITIES
ENTERING WATER TEMPERATURE (°F)
ENTERING
AIR (°F) NOMINAL CFM GPM WPD 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200°
1.0 1.1 7.9 10.5 13.1 15.7 18.3 20.9 23.5 26.1 28.7 31.3 33.9
2.0 3.7 11.7 14.3 16.9 19.5 22.1 24.7 27.3 29.9 32.5 35.1 37.7
70 600
3.0 7.6 13.3 15.9 18.5 21.1 23.7 26.3 28.9 31.5 34.1 36.7 39.3
MHNCCX-06 HEATING CAPACITIES
ENTERING WATER TEMPERATURE (°F)
ENTERING
AIR (°F) NOMINAL CFM GPM WPD 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200°
1.0 1.1 3.3 5.9 8.5 11.1 13.7 16.3 18.9 21.5 24.1 26.7 29.3
2.0 3.7 7.1 9.7 12.3 14.9 17.5 20.1 22.7 25.3 27.9 30.5 33.1
80 600
3.0 7.6 8.7 11.3 13.9 16.5 19.1 21.7 24.3 26.9 29.5 32.1 34.7
These specifications are subject to change without notice.

327
MHNCCX Hot Water Performance Data
MHNCCX-08 HEATING CAPACITIES
ENTERING WATER TEMPERATURE (°F)
ENTERING
AIR (°F) NOMINAL CFM GPM WPD 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200°
2.0 0.5 16.8 20.5 24.1 27.7 31.4 35.0 39.0 42.4 46.5 49.7 53.3
3.0 1.1 19.2 22.8 26.4 30.0 34.7 37.2 43.2 48.0 51.6 55.2 58.8
50 800
4.0 1.9
20.5 24.2 27.9 31.6 36.7 39.0 45.7 50.1 54.7 57.5 61.2
MHNCCX-08 HEATING CAPACITIES
ENTERING WATER TEMPERATURE (°F)
ENTERING
AIR (°F) NOMINAL CFM GPM WPD 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200°
2.0 0.5 13.5 17.2 20.9 24.6 28.2 32.0 35.8 39.4 43.3 46.8 50.5
3.0 1.1 15.8 19.5 23.2 26.9 31.5 .34.3 40.0 41.9 48.4 52.8 56.5
60 800
4.0 1.9
17.3 21.0 24.7 28.4 33.5 35.8 42.5 46.9 51.5 54.3 58.0
MHNCCX-08 HEATING CAPACITIES
ENTERING WATER TEMPERATURE (°F)
ENTERING
AIR (°F) NOMINAL CFM GPM WPD 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200°
2.0 0.5 10.5 14.1 17.7 21.3 25.0 28.5 32.6 35.7 40.1 42.9 46.5
3.0 1.1 12.6 16.3 20.0 23.7 28.3 34.8 36.8 42.2 45.2 49.6 53.3
70 800
4.0 1.9
14.1 17.8 21.5 25.2 30.3 32.6 39.3 43.7 48.3 51.1 54.8
MHNCCX-08 HEATING CAPACITIES
ENTERING WATER TEMPERATURE (°F)
ENTERING
AIR (°F) NOMINAL CFM GPM WPD 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200°
2.0 0.5 7.1 10.8 14.5 18.2 21.8 25.6 29.4 33.0 36.9 40.4 44.1
3.0 1.1 9.4 13.1 16.8 20.5 25.1 27.9 33.6 35.3 42.0 46.4 50.1
80 800
4.0 1.9
10.9 14.6 18.3 22.0 27.1 33.1 36.1 40.5 45.1 47.9 51.6
These specifications are subject to change without notice.

328
MHNCCX Hot Water Performance Data
MHNCCX-10 HEATING CAPACITIES
ENTERING WATER TEMPERATURE (°F)
ENTERING
AIR (°F) NOMINAL CFM GPM WPD 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200°
2.0 0.7 19.5 23.7 28.0 32.3 36.5 40.7 45.2 49.2 53.9 57.7 62.0
3.0 1.4 23.5 27.8 32.2 36.6 40.9 45.3 50.9 53.9 60.8 62.7 67.0
50 1000
4.0 2.4 26.1 30.5 34.8 39.2 43.5 47.9 54.2 58.6 64.9 69.4 73.9
MHNCCX-10 HEATING CAPACITIES
ENTERING WATER TEMPERATURE (°F)
ENTERING
AIR (°F) NOMINAL CFM GPM WPD 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200°
2.0 0.7 15.6 19.9 24.3 28.7 32.8 37.4 41.5 46.1 50.2 54.7 59.1
3.0 1.4 19.8 24.2 28.5 32.9 37.2 41.6 47.2 52.2 57.1 62.1 67.0
60 1000
4.0 2.4 22.4 26.8 31.1 35.5 39.8 44.2 50.5 55.5 61.2 65.4 70.3
MHNCCX-10 HEATING CAPACITIES
ENTERING WATER TEMPERATURE (°F)
ENTERING
AIR (°F) NOMINAL CFM GPM WPD 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200°
2.0 0.7 12.1 16.4 20.6 24.9 29.1 33.4 37.8 41.9 46.5 50.4 54.6
3.0 1.4 16.1 20.5 24.8 29.5 33.5 38.5 43.5 48.4 53.4 58.3 63.2
70 1000
4.0 2.4 18.7 23.1 27.4 31.8 36.1 41.1 46.8 51.0 57.5 60.9 65.8
MHNCCX-10 HEATING CAPACITIES
ENTERING WATER TEMPERATURE (°F)
ENTERING
AIR (°F) NOMINAL CFM GPM WPD 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200°
2.0 0.7 8.4 12.7 16.9 21.3 25.4 29.8 34.1 38.5 42.8 47.2 51.5
3.0 1.4 12.4 16.8 21.1 25.5 29.8 34.2 39.8 42.9 49.7 54.7 59.6
80 1000
4.0 2.4 15.0 19.4 23.7 28.1 32.4 36.8 43.1 48.1 53.8 58.0 62.9
These specifications are subject to change without notice.

329
MHNCCX Hot Water Performance Data
MHNCCX-12 HEATING CAPACITIES
ENTERING WATER TEMPERATURE (°F)
ENTERING
AIR (°F) NOMINAL CFM GPM WPD 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200°
2.0 0.7 20.0 24.8 29.6 34.4 39.2 44.0 49.0 53.6 58.7 63.2 68.0
3.0 1.5 23.8 28.6 33.4 38.2 44.6 47.8 56.0 61.1 67.3 72.9 78.6
50 1200
4.0 2.4
26.3 31.1 35.9 40.7 48.0 53.0 60.3 66.3 72.6 78.3 84.3
MHNCCX-12 HEATING CAPACITIES
ENTERING WATER TEMPERATURE (°F)
ENTERING
AIR (°F) NOMINAL CFM GPM WPD 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200°
2.0 0.7 16.8 21.6 26.4 31.2 36.0 40.8 45.8 51.4 55.5 60.0 64.8
3.0 1.5 19.0 24.6 30.2 35.8 41.4 47.0 52.8 58.2 64.1 69.4 76.0
60 1200
4.0 2.4
20.6 26.7 32.7 38.7 44.8 50.9 57.1 62.9 69.4 75.1 81.1
MHNCCX-12 HEATING CAPACITIES
ENTERING WATER TEMPERATURE (°F)
ENTERING
AIR (°F) NOMINAL CFM GPM WPD 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200°
2.0 0.7 13.6 18.4 23.2 28.0 32.8 37.6 42.6 47.2 52.3 56.8 61.6
3.0 1.5 15.8 21.4 27.0 32.6 38.2 43.8 49.6 55.0 60.9 66.2 71.8
70 1200
4.0 2.4
17.4 23.5 29.5 35.6 41.6 47.7 53.9 59.8 66.2 71.8 77.9
MHNCCX-12 HEATING CAPACITIES
ENTERING WATER TEMPERATURE (°F)
ENTERING
AIR (°F) NOMINAL CFM GPM WPD 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200°
2.0 0.7 10.4 15.2 20.0 24.5 29.6 34.4 39.4 44.0 49.1 53.6 58.8
3.0 1.5 12.6 18.2 23.8 29.4 35.0 40.6 46.4 51.8 57.7 63.0 58.6
80 1200
4.0 2.4
14.2 20.3 26.3 32.4 38.4 44.5 50.7 56.6 63.0 68.7 74.7
These specifications are subject to change without notice.

330

331
INSTALLATION & OPERATING
MANUAL
MHNCCX Fan Coils 1- 3 Tons
ENCLOSURE DIMENSIONS
(us)
ENCLOSURE
PART NUMBER
FAN COIL
SIZE Depth Length Height Weight
MPE468 4
32.75 39.75 11.00 26
MPE468 6
32.75 39.75 11.00 26
MPE468 8
32.75 39.75 11.00 26
MPE10 10 32.75 45.75 11.00 30
MPE12 12
32.75 51.75 11.00 34
Figure 2
GENERAL
Read the entire contents of this manual
before beginning installation. Multiaqua
assumes no responsibility for equipment
installed contradictory to any code
requirement or installation instructions.
The components of this fan coil have
been inspected at the factory and readied
for shipment. Upon receiving the
shipment a visual inspection of the
packaging must be performed.
If any damage to the packaging is
discovered, an inspection of the
components must be performed and
noted on the delivery documents. If
component damage is found a damage
claim must be filed by the receiving party
against the delivery party immediately.
This product is designed and
manufactured to permit installation in
accordance with national codes. It is the
installer’s responsibility to install the
product in accordance with national
codes and / or prevailing local codes and
regulations.
Care must be taken to ensure the
structural integrity of the supporting
members, clearances and provisions for
servicing, power supply, coil connections
and/or condensate removal. Before the
installation ensure the structural strength
of the supporting members is sufficient.
See figure 1 for hanging weights of the
fan coils.
This unit is designed to be installed in a
-------------------------------------- CAUTION --------------------------------------
Care must be taken when handling sheet metal. Sheet metal parts have sharp edges and could
cause injury.
horizontal configuration only and into an
enclosure assembly. The enclosure assembly
can be ordered separately or field fabricated
by the installing contractor. See figure 2 for
enclosure part numbers, dimensions and
weights. See document number 030710001
for enclosure assembly and installation
instructions. See figure 3 for fan coil only
dimensions.
The coil hand of connection is field
reversible. See figures 4-6 for converting the
coil hand of connection.
FAN COIL APPROXIMATED
MODEL NUMBER WEIGHTS (LBS)
MHNCCX04 66.0
MHNCCX06 68.2
MHNCCX08 72.6
MHNCCX10 74.8
MHNCCX12 83.6
Fi
g
ure 1

332
INSTALLATION & OPERATING
INSTRUCTIONS
MHNCCX Fan Coils 1- 3 Tons
FAN COIL DIMENSIONS
Fan Coil
Model Number A B C D E F
MHNCCX04 37.72 34.56 31.41 10.00 5.51 21.65
MHNCCX06 37.72 34.56 31.41 10.00 5.51 21.65
MHNCCX08 37.72 34.56 31.41 10.00 5.51 21.65
MHNCCX10 43.70 40.55 37.40 10.00 5.51 21.65
MHNCCX12 49.68 46.53 43.38 10.00 5.51 21.65
F
E
D
Hot Water Supply
1” .75” (MPT)
Condensate
Drain Connection
(Both Ends)
.5” Air Vent
Coil Drain
A
Drain Pan
Mounting Notches
Figure 3
Hot Water Return
TXV & Liquid
Line
Suction Line
C
B

333
INSTALLATION & OPERATING
MANUAL
MHNCCX Fan Coils 1- 3 Tons
Figure 4
Figure 5
INSTRUCTIONS FOR
CONVERTING COIL
HAND OF CONNECTION
1. Remove the eleven screws that
attach the top to the fan coil
assembly and remove the top.
Figure 4
2. Remove the sixteen screws
that hold the coils into the fan coil
frame assembly. Four screws per
each side of the coils.
Figure 5
3 Slide the coils out of the fan
coil frame assembly toward the
coil headers. Ensure that care is
taken when removing and
inserting the coils not to damage
the coil fins. Insert the coils into
the fan coil frame assembly from
the other end and reverse
procedures 4 & 5 to reassemble
the fan coil.
Figure 6
Figure 6
-------- CAUTION -------
Care must be taken when
handling sheet metal. Sheet
metal parts have sharp edges
and could cause in
j
ur
y
.

334
INSTALLATION & OPERATING
MANUAL
MHNCCX Fan Coils 1- 3 Tons
Fi
g
ure 7
INSTRUCTIONS FOR
INSTALLING FAN COIL
UNIT INTO ENCLOSURE
ASSEMBLY
1. Remove the ten screws that
attach the electrical assembly to
the fan coil unit. Do not separate
the electrical assembly from the
blower assembly. These two
assemblies will be removed in the
next step. Figure 7
2. Remove the five screws
attaching the blower assembly to
the coil assembly. Separate the
electrical and blower assemblies
from the coil assembly.
Figure 8
3. Insert the coil assembly into
the enclosure assembly starting
with the discharge air opening of
the coil first. Ensure that the
discharge of the coil is inserted
into the discharge of the
enclosure completely. Failure to
completely insert the coil
discharge will result in
recirculation of the discharge air.
Figure 9
Figure 8
Figure 9

335
INSTALLATION & OPERATING
MANUAL
MHNCCX Fan Coils 1- 3 Tons
4. Align the fan coil mounting
bolts up with the four mounting
notches provided in the coil
assembly top. Secure the coil
assembly to the enclosure with
two mounting bolts per side.
Ensure that the coil assembly is
level in both directions to allow
proper drainage and operation.
Figure 10
5. Reinstall the blower assembly
onto the coil assembly using the
five screws previously removed
in step 2 figure 8.
Figure 11
6. Reinstall the electrical
assembly onto the coil assembly
using the ten screws previously
removed in step 1 figure 7.
Figure 12
ELECTRICAL, COIL,
DRAIN AND RETURN /
SUPPLY AIR LOCATIONS
7. There are multiple entry points
on the factory supplied enclosure
assembly for water lines,
condensate lines, refrigerant lines
and electrical connections. If a
non-louvered service access panel
is used or if an alternate return air
location is required an optional
return air cutout is provided.
Figure 13
Figure 10
Figure 11
Figure 12

336
INSTALLATION & OPERATING
MANUAL
MHNCCX Fan Coils 1- 3 Tons
Figure 14
Figure 14
ELECTRICAL &
CONDENSATE DRAIN
8. There are four termination
points for the electrical wiring.
There are two on each side of the
electrical box. See pages 341 & 342
for electrical drawings. Wiring
must be installed according to
prevailing codes and regulations.
The fan coil unit has one
condensate drain connection on
either side of the drain pan for
either left or right hand drain
connection. The opposite drain
connection not being used must be
capped off by the installing
contractor. The middle drain
connection is the safety condensate
drain connection. Ensure that all
condensate drain lines have at least
one quarter of an inch of fall per
foot for proper drainage.
Figure 14
COIL CONNECTIONS
9. The fan coil unit comes with a
manual air bleed and a manual coil
drain fitting on the hot water coil.
The water supply line is to be
connected to the coil connection
furthest away from the fans. The
water return line is connected to the
coil connection closest to the fans.
The DX coil comes with a factory
installed TXV. Ensure that the
supply / return lines on the water
coil, the DX suction line and the
DX liquid line after the TXV are
insulated per code.
Figure 15
Figure 13
Entry Points
Typical Both Ends
Optional Return
Air Cutout
Electrical Terminations Points
Safet
y
Drain Connection
Left and Right Hand Drain Connections
Figure 15
Water Return
Manual Coil Drain
Water Su
pp
l
y
Manual Coil Air Bleed
Li
q
uid Line & TXV
Suction Line
Figure 15

337
INSTALLATION & OPERATION
MANUAL
MHNCCX Fan Coils 1-3 Tons
Figure 16
RETURN AND SUPPLY AIR CONNECTIONS
10. When mounting the service access panel, louvered or non-louvered, the installing contractor
must provide a frame in order to connect the enclosure assembly to the service access panel. This is
required to obtain an airtight seal for the return air. Ensure that the material used for the frame
adheres to national codes and / or local codes and regulations. Care must be taken when installing
the service access panel to ensure the opening of the hinged service panel.
Figure 16 & 17
11. Filters are not supplied with the fan coil unit or the service access panel. The filter(s) must be
supplied by the installing contractor. If a louvered service access panel is used the filter will mount
on the under side of the hinged access panel. If the optional return air cutout is used it is
recommended that a return air filter grille be used that has the same surface area as the
recommended filter sizes. Figure 18
Supply Duct Flange
Fan Coil Enclosure
Ceiling
Fan Coil Mounting Bolts
Typical All Four Corners
Hinged Service Access Panel
Louvered Panel Shown Return Ai
r
Frame Enclosure
Supplied By
Installing Contractor
Panel Mountin
g
Screw
(
TYP
)
Optional Return Air Cutout