Magic Aire DUC Series User manual

035-000050-001 1DUC IOM 1.2 5-9-2018
DUC Series Vertical FCU
Installation, Operation and Maintenance
Manual
VERTICAL
OPTION
HORIZONTAL
OPTION
Magic Aire DUC Series vertical fan coil units are direct drive High Efficiency air handlers delivering nominal
airflows of 600 to 2000 CFM and nominal cooling capacities of 1-1/2 to 5 tons.
Units may be specified with chilled water or DX cooling coils and hot water or electric heating coils to meet space
cooling loads or heating loads or both.

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Installaon, Start-Up
and Service
Instrucons
DUC Series Vertical FCU
Installation, Operation and Maintenance
Manual
Topic Page
SAFETY CONSIDERATIONS 5
PRODUCT NOMENCLATURE 6
ACCESSORIES 7
INSTALLATION 8
Pre-installation 8
Rigging 8
Service Clearances 9
Return Air & Unit Orientation 10
Unit Suspension or Floor Mount 13
Unpacking 12
Condensate Drain 12
Ductwork 13
Refrigerant Piping 13
Electric Heater Accessory 14-16
Electrical 17-18
Wiring Diagrams 19-23
START-UP 24
SERVICE 25-27
Fan & Fan Motor 25-26
Filters 27
Access Panels 27
Coil & Drain Pan Service 28
AIRFLOW DATA 29-35
ELECTRICAL RATINGS 36-37
DIMENSIONS 38-40
REFRIGERANT LEAKAGE WARNINGS 45
REPLACEMENT PARTS 41-45
STARTUP REPORT 46

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How to Use this Manual
This manual gives instructions regarding installation,
operation and maintenance for the DUC Series fan coil
unit. For more information refer to:
Catalog brochure for unit dimensions, options,
guide specifications and performance information.
New Magic 4 software for faster selection of new
equipment.
Website www.magicaire.com for replacement
parts guide, software downloads, product data and
contact info for your local Magic Aire representative.
Replacement Parts – Identify parts needed using
the replacement parts guide available at
www.magicaire.com.
Use these instructions in conjunction with other appro-
priate instructions, including but not limited to those in-
structions supplied with the outdoor unit (if applicable).
Installation must comply with all applicable local codes.
GENERAL
Installation and maintenance are to be performed only
by qualified personnel who are familiar with local codes
and regulations and are experienced with HVAC equip-
ment of this type.
WARNING: Sharp edges, coil surfaces and rotat-
ing fans are a potential injury hazard – avoid
contact.
WARNING: Hazardous voltage – Disconnect and
Lock Out all incoming power sources before ser-
vicing or installing unit. ELECTRIC SHOCK CAN
CAUSE DEATH.
WARNING: This equipment may be installed well
above finished floor—Use extreme caution when
working at heights.
SAFETY WARNING
Installer should pay particular attention to the following
words:
NOTE–intended to clarify or make installation easier.
CAUTION–given to prevent equipment damage.
WARNING–to alert installer that personal injury and/or
equipment damage may result if installation procedure
is not properly followed.
UNPACKING-CHECK FOR DAMAGE!
Immediately inspect each unit for damage upon re-
ceipt.
1.Inspect units for external and concealed damage
immediately.
2.File any damage claims in accordance with Magic
Aire Freight Damage Policy and Terms and Condi-
tions (available at www.magicaire.com).
3.Do not repair damaged units without written authori-
zation.
4. Protect stored units from damage.
DANGER
Failure to torque impeller set screws properly may lead
to impeller failure and high velocity debris that is a le-
thal hazard!
Failure to rebalance wheel/motor after re-assembly
could result in unacceptable vibration, possibly leading
to impeller failure—lethal hazard!
Failure to follow these warnings could lead to personal
injury or death.
DANGER
NEVER enter an enclosed fan cabinet or reach into a
unit while the fan is running.
LOCK OPEN AND TAG the fan motor power disconnect
switch before working on a fan. Take fuses with you and
note removal on tag. Electric shock can cause personal
injury or death.
LOCK OPEN AND TAG the electric heat coil power dis-
connect switch before working on or near heaters.
Failure to follow these warnings could lead to personal
injury or death.
WARNING
CHECK the assembly and component weights to be
sure that the rigging equipment can handle them safely.
Note also, the centers of gravity and any specific rig-
ging instructions.
CHECK for adequate ventilation so that fumes will not
migrate through ductwork to occupied spaces when
welding or cutting inside air-handling unit cabinet or
plenum.
WHEN STEAM CLEANING COILS be sure that the
area is clear of personnel.
DO NOT attempt to handle access covers and remova-
ble panels on outdoor units when winds are strong or
gusting until you have sufficient help to control them.
Make sure panels are properly secured while repairs
are being made to a unit.
DO NOT remove access panel fasteners or open ac-
cess doors until fan is completely stopped. Pressure
developed by a moving fan can cause excessive force
against the panel which can injure personnel.
DO NOT work on dampers until their operators are dis-
connected.
BE SURE that fans are properly grounded before work-
ing on them.
Failure to follow these warnings could result in personal
injury or equipment damage.

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PRODUCT NOMENCLATURE—ACCESSSORIES
Direct Drive
Generaon
Unit Size
1.5 through 5 Tons
(600 through 2000 CFM)
Primary Coil
3- or 4-Row CHW/2-Pipe or
Std Cap DX or High Cap DX
(single or dual circuit)
Secondary Coil
2-, 3-, or 4-Row HW or Electric
Heat, factory mounted.
Coil Treatment
Phenolic Coang
Motor & Voltage
Numerous motor selecons
including Single Phase standard
duty and ECM-VE single phase.
Drain Pan and Insulaon
Galvanized, Stainless Steel,
Universal
Foil Face Insulaon
Control Opons
Fan Control 24V, Mul-funcon
controllers
MODEL NOMENCLATURE
Position 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Example D U C 1 2 B 2 B S 5 B B A M
Return Air Cabinet Opons
Vercal and Horizontal
conguraons with Le,
Minor Design Revision
Standard Grade
Label
Use our New Magic 4 Selecon
Soware for:
 exact unit model selecon
 performance data
 submial informaon

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PRODUCT NOMENCLATURE—ACCESSSORIES
Product Part Number Description
Product size
(H X W X D)
Package size
(H X W X D)
Weight
(Net)
Weight
(Gross)
Electric Heater 012-000458-100 1kW for sizes 06-20 6.7" X 11.0" X 22.5" 9" X 13" X 27" 4 lbs 6 lbs Electric Heater 012-000458-101 3kW for sizes 06-20 6.7" X 11.0" X 22.5" 9" X 13" X 27" 5 lbs 7 lbs Electric Heater 012-000458-102 5kW for sizes 06-20 6.7" X 11.0" X 22.5" 9" X 13" X 27" 5 lbs 7 lbs Electric Heater 012-000458-103 6kW for sizes 06-20 6.7" X 11.0" X 22.5" 9" X 13" X 27" 5 lbs 8 lbs Electric Heater 012-000458-104 8kW for sizes 06-20 6.7" X 11.0" X 22.5" 9" X 13" X 27" 6 lbs 8 lbs Electric Heater 012-000458-105 9.5kW for sizes 06-20 6.7" X 11.0" X 22.5" 9" X 13" X 27" 6 lbs 8 lbs Electric Heater 012-000458-106 14.5kW for sizes 10-20 6.7" X 11.0" X 22.5" 9" X 13" X 27" 7 lbs 9 lbs Electric Heater 012-000458-107 19.5kW for sizes 14-20 6.7" X 11.0" X 22.5" 9" X 13" X 27" 7 lbs 9 lbs Plenum Chamber contact factory For 06-08 Model, with 2" Filter, Single Pkg 20.2" X 17.5" X 22.2" 22" X 23" X 28" 36 lbs 43 lbs Plenum Chamber contact factory For 10-12 Model, with 2" Filter, Single Pkg 20.2" X 20.0" X 25.2" 22" X 26" X 31" 41 lbs 49 lbs Plenum Chamber contact factory For 14-16 Model, with 2" Filter, Single Pkg 24.2" X 22.0" X 27.2" 26" X 28" X 33" 49 lbs 59 lbs Plenum Chamber contact factory For 20 Model, with 2" Filter, Single Pkg 24.2" X 24.0" X 31.2" 26" X 30" X 37" 60 lbs 71 lbs Filter Box contact factory For 06-08 Model, 2" MERV 8 Filter 4" X 17.5" X 22.2" 8" X 21" X 26" 12 lbs 15 lbs Filter Box contact factory For 10-12 Model, 2" MERV 8 Filter 4" X 20.0" X 25.2" 8" X 23" X 29" 14 lbs 18 lbs Filter Box contact factory For 14-16 Model, 2" MERV 8 Filter 4" X 22.0" X 27.2" 8" X 25" X 31" 15 lbs 19 lbs Filter Box contact factory For 20 Model, 2" MERV 8 Filter 4" X 24.0" X 31.2" 8" X 27" X 35" 20 lbs 25 lbs
Notes: 1. Plenums have 1/2" berglass insulaon. 2. Plenums and lter boxes have lter slot that will accept 4" thick lter or 2" thick lter. To use with 4"
thick lter lter, remove 2” lter, remove lter rail, and add eld-supplied 4” thick lter.
3. Return air Grille(s) and duct collars are eld-provided and eld-installed. 4. Plenums have return air duct openings on front, right and le sides. Front and right sides have at co-
vers that can be relocated as needed. Opening in rear can be cut in the eld.

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WARNING-AUXILIARY DRAIN PAN
RECOMMMENDED:
This product has an auxiliary condensate drain which
should be piped to a condensate overflow sensor or
safe drain location or both to protect the equipment and
property from damage in the case of condensate over-
flow.
The International Mechanical Code (IMC) section
307.2.3 requires the use of auxiliary drain pans. Many
municipalities have adopted this code.
Magic Aire holds that this practice represents the stand-
ard for professional installation whether or not this code
has been adopted in a specific municipality or territory.
As such, water damages that would have been prevent-
ed had an auxiliary pan been deployed will not be con-
sidered for compensation. This position is taken regard-
less of whether the source of the moisture was specified
as a potential failure mode in the applicable building
code or not. A freeze burst, cracked drain pan, failed
weld, or corrosion induced leak are some of the potential
failure modes that are mitigated when an auxiliary pan is
properly installed. Professional installers recognize the
value of protecting customer assets against foreseeable
events. Customers who choose to avoid the cost of com-
mon protective measures waive their right to seek dam-
ages when those foreseeable events occur. If the prod-
uct is located above a living space or where damage
may result from condensate overflow, install a watertight
pan of corrosion-resistant metal beneath the unit to catch
overflow which may result from clogged drains or from
other reasons. Provide proper drain piping for this auxil-
iary pan. Consult local codes for additional precautions
before installation.
PREINSTALLATION
1. Check items received against packing list.
2. Do not stack unit components or accessories during
storage. Stacking can cause damage or defor-
mation.
3. If unit is to be stored for more than 2 weeks prior to
installation, observe the following precautions:
a. Choose a dry storage site that is reasonably
level and sturdy to prevent undue stress or per-
manent damage to the unit structure or compo-
nents. Do not store unit on vibrating surface.
Damage to stationary bearings can occur. Set
unit off ground if in heavy rain area.
b. Remove all fasteners and other small parts
from jobsite to minimize theft. Tag and store
parts in a safe place until needed.
c. Cover entire unit with a tarp or plastic coverall.
Extend cover under unit if stored on ground.
Secure cover with adequate tie-downs or store
indoors. Be sure all coil connections have pro-
tective shipping caps.
d. Monthly — Remove tarp from unit, enter fan
section through access door or through fan in-
let, and rotate fan and motor slowly by hand to
redistribute the bearing grease and to prevent
bearing corrosion.
Rigging — Do not remove shipping skids or protective
covering until unit is ready for final placement. Use
slings and spreader bars as applicable to lift unit. Do not
lift unit by coil connections or headers.
1. Do not remove protective caps from coil piping con-
nections until ready to connect piping.
2. Do not remove protective cover or grease from fan
shaft until ready to install sheave.
3. Lay rigid temporary protection such as plywood
walkways in unit to prevent damage to insulation or
bottom panel during installation.
Fig. 1 and 2
Horizontal and Vertical Fan Coil Units with Second-
ary (Auxiliary) Drain Pans
Provide the secondary pan with it’s own water flow sen-
sor along with piping to a safe location where drainage
will visually indicate the error condition. Vertical installa-
tion must be below the ducted return (if present).
INSTALLATION
Fig. 1
Fig. 2
(FIELD-PROVIDED)
(FIELD-PROVIDED)

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INSTALLATION—SERVICE CLEARANCES
NOTES:
1. BLOWER SERVICE REQUIRES FRONT ACCESS
ONLY.
2. RECOMMENDED BUT NOT NECESSARY: AL-
LOW 12” ON RIGHT AND LEFT SIDES FOR SIG-
NIFICANT BUT INFREQUENT SERVICE PROCE-
DURES SUCH AS DRAIN PAN OR COIL RE-
PLACEMENT.
A B C D E F
06/08 36.0 36.0 36.0 22.0 6.0 9.0
10/12 36.0 36.0 36.0 25.0 6.0 10.0
14/16 36.0 36.0 36.0 27.0 6.0 11.0
20 36.0 36.0 36.0 31.0 6.0 11.0
G H L M N
06/08 12.0 7.0 19.4 35.7 45.0
10/12 12.0 7.0 23.5 40.6 50.0
14/16 12.0 7.0 26.3 43.6 54.0
20 12.0 7.0 28.3 46.4 56.0
UNIT
SIZE
CLEARANCE DIMENSION
(INCHES)
3. WHEN UNIT IS INSTALLED HORIZONTALLY
(LYING ON RIGHT OR LEFT SIDE), CLEARANC-
ES REMAIN THE SAME AS INDICATED ABOVE,
EXCEPT TRAP CLEARANCE EXTENDS BELOW
THE UNIT. NOTES:

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Cabinet and Drain Pan Configurations
Notes:
1. Return Air Cabinet is model digit 12; drain pan is digit 13.
Refer to New Magic 4 soware for selecons and perfor-
mance.
2. All drain pans have front condensate drain connecons
(primary and auxiliary), and so are RH or LH, not both.