Magic Aire HB Series User manual

United Electric Company, L.P. • 501 Galveston • Wichita Falls, TX 76301 • 940-397-2100 • Fax [phone]
Part #: 010-200002-000 1-16-07
The following information is to be used by the
installer as a guide. Since each installation is unique
unto itself, only general topics are covered.The order
in which topics may be presented may not be those
required by the actual installation.
This guide does NOT supersede or circumvent any
applicable national, state or local code.
The installation is to be performed only by
individuals whose experience meets or exceeds the
requirements of the work involved.
The installer MUST read the entire contents of this
guide and develop a thorough understanding before
beginning.
Due to a continuing program of product research,
Magic Aire reserves the right to discontinue or
change without notice, any or all specifications or
designs without incurring obligations.
INSPECTION
Thoroughly inspect all packages upon receipt. Ensure
carton(s) have not been dropped, crushed or
punctured. Inspect all contentsfor damage. If
damage is found, immediately file a claim with the
delivering carrier.
MODEL HB
INSTALLATION
OPERATIONS
&
MAINTENANCE INSTRUCTIONS
ONLY TRAINED/QUALIFIED PERSONNEL
SHOULD PERFORM SERVICE AND/OR
INSTALLATION
SAFETY
The installation and/or servicing of comfort
conditioning equipment can be hazardous due to
system pressures and electrical devices.
OBSERVE ALL PRECAUTIONS AND
WARNINGS IN PRODUCT DATA OR
ATTACHED TO UNIT.
Follow all safety codes.Wear eye protection and
gloves. Have a fire extinguisher readily available.
DISCONNECT ALL POWER SUPPLIES
BEFORE
ACCESSING EQUIPMENT.
DISCONNECTING MORE THAN ONE POWER
SUPPLY MAY BE REQUIRED TO
DE-ENERGIZE SOME EQUIPMENT.
ELECTRIC SHOCK CAN CAUSE DEATH

United Electric Company, L.P. • 501 Galveston • Wichita Falls, TX 76301 • 940-397-2100 • Fax [phone]
21-16-07 Part #: 010-200002-000

United Electric Company, L.P. • 501 Galveston • Wichita Falls, TX 76301 • 940-397-2100 • Fax [phone]
Part #: 010-200002-000 1-16-07

United Electric Company, L.P. • 501 Galveston • Wichita Falls, TX 76301 • 940-397-2100 • Fax [phone]
41-16-07 Part #: 010-200002-000
COIL
CONNECTION SHP WT COIL CONNECTION SHP WT LIQUID LINE SUCTION LINE SHP WT COIL CONNECTION SHP WT
HBB 04 3/4 OD SW 145 3/4 OD SW 156 3/8 OD SW 3/4 OD SW 145 5/8 OD SW 13
HBB 06 3/4 OD SW 171 7/8 OD SW 190 3/8 OD SW 3/4 OD SW 171 7/8 OD SW 18
HBB 08 3/4 OD SW 145 3/4 OD SW 156 3/8 OD SW 3/4 OD SW 145 5/8 OD SW 13
HBB 12 3/4 OD SW 171 7/8 OD SW 190 3/8 OD SW 3/4 OD SW 171 7/8 OD SW 18
HBB 16 7/8 OD SW 200 1-1/8 OD SW 227 1/2 OD SW 7/8 OD SW 200 7/8 OD SW 25
HBB 20 7/8 OD SW 244 1-1/8 OD SW 263 1/2 OD SW 1-1/8 OD SW 244 1-1/8 OD SW 30
HBB 30 1-1/8 OD SW 457 1-3/8 OD SW 475 5/8 OD SW 1-1/8 OD SW 457 1-1/8 OD SW 41
HBB 40 1-3/8 OD SW 512 1-5/8 OD SW 547 5/8 OD SW 1-3/8 OD SW 512 1-1/8 OD SW 53
HBA 60 1-3/8 OD SW 700 1-5/8 OD SW 787 7/8 OD SW 1-3/8 OD SW 700 1-3/8 OD SW 86
HBA 80 1-5/8 OD SW (2) 775 1-5/8 OD SW (2) 855 5/8 OD SW (2) 1-3/8 OD SW (2) 775 1-1/8 OD SW (2) 106
2 ROW WATER
MODEL 4 ROW WATER 6 ROW WATER 3 ROW DX

United Electric Company, L.P. • 501 Galveston • Wichita Falls, TX 76301 • 940-397-2100 • Fax [phone]
Part #: 010-200002-000 1-16-07
HB Product Dimensions
C1DoubleWall Height Dimension: NOTE: Models 30-80 tops are standard double wall construction.
Note 1: Blower Opening 7” down from top of unit. Looking at discharge 14-3/8” left side, 11-3/8” center and 8-3/8” right side.
Note 2: Blower Opening 11-7/8” down from top of unit. Looking at discharge 14-3/16” left side, 11-3/8” center and 13-16/16” right side.

United Electric Company, L.P. • 501 Galveston • Wichita Falls, TX 76301 • 940-397-2100 • Fax [phone]
61-16-07 Part #: 010-200002-000
INSTALLATION
Optional equipment:
1. Discharge grille/plenum.
2. Return air grille.
3.Two row hot water heating coil (reheat or preheat
location).
4. Mixing boxes.
5. Motor and drive selections.
6. Steam coils (reheat or preheat).
Step 1 – Ductwork
Use accepted industry practices and design guidelines of
theASHRAE FUNDAMENTALS HANDBOOK.Ductwork
must comply with all building codes and the NATIONAL
FIRE PROTECTION ASSOCIATION’S pamphlet 90A and
90B. Carefully inspect any previously installed ductwork to
determine suitability.
Note: Ductwork should be of a size meeting requirements
of the installation. Ductwork should transition gradually
from a smaller size blower outlet to required duct run size
to avoid excessive loss of air velocity.
Step 2 – Check duct insulation and vapor proofing
Previously installed heating supply ductwork may already
have adequate insulation against excessive heat loss.This
insulation may be satisfactory for protection against heat
gain from summer cooling. Depending on application, it
may be required to add more insulation.
Externally insulated ductwork must have adequate vapor
seal for summer operation, particularly where duct is
exposed to high humidity conditions such as in attic,
vented crawl space, unconditioned basement or utility
room.
Step 3 – Place unit in ductwork
1.When return air duct connection is smaller than coil
inlet opening, construct the transition piece so that vertical
and horizontal dimensions of transition do not increase
more than one inch for every seven inches of length.
2.Allow a minimum of 3 feet of straight ductwork
preceding equipment inlet.
3. Suspend unit or support it from floor. All units have 7/8"
knockouts in each corner of top and base panels for
suspension rods to pass through, located 3.5" in from
corners on center line. It is recommended that angle iron
or unistrut be used under the unit for support (these
support pieces should extend approximately 1” beyond
each end of the unit width, see figure at right.
5. Be careful that suspension rods are located so they do
not block access panels, nor interfere with electrical,
mechanical or drain functions of unit.
WARNING
BEFORE INSTALLINGTHE UNIT, DETERMINE
WHETHER UNIT WEIGHT CAN BE SAFELY
SUPPORTED.
POSSIBLE INJURY AND DAMAGE MAY RESULT DUE
TO JOIST/TRUSS OVERLOADING.
Refer to submittal data for knockout
locations. 3/16/2010

United Electric Company, L.P. • 501 Galveston • Wichita Falls, TX 76301 • 940-397-2100 • Fax [phone]
Part #: 010-200002-000 1-16-07
Step 4 – Sound Attenuation
Flexible duct connections should be used between the unit
and both the supply and return ducts. Unit vibration
isolation will be required for both suspended and base
mounted units.
Step 5 – Installation of Condensate Drain
Condensate drain must consist of a minimum of 3/4 in.
copper tubing or 3/4 in. galvanized iron pipe or PVC-type
plastic pipe. (Fig.3). The condensate drain trap must be
properly designed to ensure the removal of condensate
(incorrect trapping can hold water in pan causing
overflow). Be sure drain pitches downward at a slope of
one inch every ten feet.
CAUTION
If unit is located above an occupied space, or where
damage can result from condensate overflow.Install a
watertight pan of corrosion-resistant metal beneath unit to
catch any overflow due to restricted drain lines.A seperate
3/4 in. condensate drain must be provided from this added
pan (Fig.4).
Note: Consult local codes for additional precautions before
installing condensate drain.
Step 6 – Direct expansion (DX) refrigerant piping
Always use the condensing unit manufacturer’s
recommended line sizes.The suction line must be insulated
for satisfactory operation. Observe all condensing unit
manufacturer’s recommendations or requirements.Use
refrigerant grade copper only.
If unit is to be used when installed as the indoor coil of a
heatpump, a bypass check valve must be used.
Note: It is recommended that a freeze-stat (by other) be
installed when a hot water coil is used and is mounted in
the reheat position. MagicAire is not responsible for HW
coil freeze failures when the DX coil is in the first position
and HW coil is in reheat.
(Fig.5) below shows the basic installation of aTXV and the
location of the sensing bulb.
Step 7–Water Piping
All piping must be supported independent of coils. Swing
joints or flexible fittings must be provided to absorb
expansion and contraction strains. Rigid piping reduces the
effectiveness of vibration isolators.The water supply should
always be connected so that the entering water is on the
leaving air side of the coil (Fig.6). Coils must be adequately
vented in order to prevent air binding. Freeze-ups due to
low entering air temperatures are not covered under the
Magic Aire Warranty.
Step 8 – Motors and drives
Units will normally be shipped with motor and drive
installed.However,when mounting a motor on the
adjustable base in the field, extreme care should be taken
to ensure proper alignment and belt tension.
Trap the drain as illustrated which also illustrates the proper
piping as well as the operation of the trap. Use the formula
given to determine the correct minimum depth of the
condensate trap.

United Electric Company, L.P. • 501 Galveston • Wichita Falls, TX 76301 • 940-397-2100 • Fax [phone]
81-16-07 Part #: 010-200002-000
Step 9 – Electrical connections
A control box is mounted on each unit and the motor is tobe wired to this box.
Note: Unit must be permanently ground in accordance with NEC and local codes and ordinances.
1
2
3LOW
SPEED
11
12
13 HIGH
SPEED
L1
GRN/100
TWO-SPEED
MOTOR
L2
L3
BLU/102
YEL/103
BLK/101
RED/104
ORN/105
BRN/106
BLU/102
YEL/103
BLK/101
RED/104
ORN/105
BRN/106
LOW
SPEED
HIGH
SPEED
L1
L2
L3
GRN/100
Field supplied fan controls must provide motor overload protection and
must prevent simultaneous engagement of both high and low speeds.
Both motor windings must be connected in the correct phase sequence.
See Motor
Nameplate for
Wiring Detail
C
H
L
N
GRN/100
L1 (HIGH)
L1 (LOW)
BLK/102
RED/103
WHT/101
BLK/102
RED/103
WHT/101
GRN/100
Field supplied fan controls must prevent simultaneous engagement of both high and low speeds.
See Motor
Nameplate for
Wiring Detail
2 Speed Motor 3 Phase
2 Speed Motor 1 Phase 115/277v
C
H
L
L2 (COM)
GRN/100
L1 (HIGH)
L1 (LOW)
BLK/102
RED/103
YEL/101
BLK/102
RED/103
YEL/101
GRN/100
Field supplied fan controls must prevent simultaneous engagement of both high and low speeds.
See Motor
Nameplate for
Wiring Detail
2 Speed Motor 1 Phase 208/230v
Typical Wiring Diagrams

United Electric Company, L.P. • 501 Galveston • Wichita Falls, TX 76301 • 940-397-2100 • Fax [phone]
Part #: 010-200002-000 1-16-07
115 or 265 V, Single Phase
208-230V, Single Phase
208-230, 460, 575V, Three Phase
L1
L2
BLK
RED
GRN
See Motor
Nameplate for
Wiring Detail
L3 ORN
L1
L2
BLK
RED
GRN
See Motor
Nameplate for
Wiring Detail
L1
N
BLK
WHT
GRN
See Motor
Nameplate for
Wiring Detail
Typical Wiring Diagrams

United Electric Company, L.P. • 501 Galveston • Wichita Falls, TX 76301 • 940-397-2100 • Fax [phone]
10
1-16-07 Part #: 010-200002-000
START-UP
Ensure that ALL RED shipping bolts/screws are removed
and all other bolts and screws are tight.The red hold-
down shipping bolts are located on both sides of the
blower/motor mounting rails and are accessible through
the side access panels.The red sheet metal screws are
located on the discharge duct collar.All must be removed
for the blower assembly to be isolated from the cabinet. See
figure page 11. Check the sheaves to see if they are in
alignment and ensure the set screws are tight. Check for
proper rotation of the blower pulley.Three phase motor
rotation can be reversed by exchanging two of the three
leads at the motor.Not all installations will be on starter.
The rotation of single phase motors can be reversed by
exchanging leads inside the motor junction box. Refer to
motor nameplate. Ensure all filters are installed. Do this
with all doors, panels, etc. in place. Check the amperage
draw of the motor.This should not exceed the nameplate
amps shown on the motor serial plate. Never assume the
voltage and phase on the unit name plate is the same as the
motor is wired.
OPERATIONAND MAINTENANCE
WARNING
Disconnect electrical power to all circuits before servicing
unit.Failure to do so may result in personal injury from
electrical shock or moving parts.
RETURN AIR FILTERS – Filter access is from either side of
unit. Inspect on a regular basis (at least monthly) and clean
or replace.
CAUTION
Never operate unit without a filter or with filter access
door removed.Damage to blower motor may result.
Water Piping -All Drain
Coil is easily cleaned when dry.To check or clean, remove
unit access panel, filter access door and filters. Use
accepted industry methods for cleaning. Remove all foreign
matter from pan and condensate drain line. Check for rust
and holes.
BELTAND PULLEY - Proper pulley alignment and belt
tension must be maintained at all times. Speed is reduced
by adjusting pulley faces so they are farther apart; speed is
increased with faces closer together.Check pulley setscrews
and bolts.
MOTOR - Use electric motor oil or SAE20 nondetergent
oil.Tighten motor mount bracket and base bolts as
required. DO NOT OVER-OIL!!
BLOWER - Check bearing for wear.Replace as required.
Check wheel for accumulation of dirt and clean as
required.
HOTWATER COIL INSTALLATION INSTRUCTIONS
(in reheat position) ON CHILLED WATER COIL UNITS
1. Remove access panel from both sides of cabinet. See (Fig.
8).
2. Remove knockouts from hot water coil stubouts. Coils
stub out the cabinet for left-hand connections (facing
Fig. 9
airflow).
3. Remove 2 galvanized strips from hot water coil package.
Install angle strip with notches resting in drain pan, and 1/2
in. flange pointing toward blower. Secure this angle strip to
end plate of cooling coil by clips supplied in package (Fig.
9). Place clips at each end of strip as close as possible to
flange.
Fig. 8 - Installing Angle Strips
4. Install other angle strip at top of cooling coil, with 1/2 in.
flange resting on top of cooling coil, pointing to rear.
Place clip as high as possible on this strip. Secure it to
end plate of cooling coil. Metal strips prevent air from
bypassing heating coil and serve as support for coil.
5.After strips are secured, install coil inside through access
door opposite side where connections stub out. Raise coil
slightly above drain pan and line up stubouts with
knockout holes in cabinet.When stubouts are extended
through holes, hot water coil should rest on flange of
bottom angle strip with hot water coil and cooling coil end
plates lined up evenly.
6. Secure hot water coil to cooling coil by fastening 2 clips
over cooling coil and hot water coil end plates (Fig. 9).
Note: It is not recommended but, when used in reheat
position with DX coil, install a freeze-stat in system to
prevent freeze-up.MagicAire is not responsible for HW coi
l failure due to freezing from DX system.
HOTWATER COIL INSTALLATION INSTRUCTIONS
(in preheat position)
Follow same procedures as before except cooling coil must
be removed from cabinet.

United Electric Company, L.P. • 501 Galveston • Wichita Falls, TX 76301 • 940-397-2100 • Fax [phone]
Part #: 010-200002-000 1-16-07
Shipping Bolt and Screw Removal

United Electric Company, L.P. • 501 Galveston • Wichita Falls, TX 76301 • 940-397-2100 • Fax [phone]
12
1-16-07 Part #: 010-200002-000
V-Belt Alignment
After installing the bushings in the sheaves and the resulting
assemblies onto the shafts, use a straight edge, piano wire or string
placed on the outside face of both sheaves to adjust parallel offset
and angular alignments.The straight edge, piano wire or string should
be close to the shafts and contact each sheave in two places.The
objective is to have the shafts parallel and the center lines of the two
sheaves in line. See Figure 1 below.
Belt drives should be aligned as perfect as possible to maximize drive life.The practical maximum misalignment is stated as
the angle at which the belt enters the sheave.This angle is a result of both angular and parallel offset misalignment, and is
1/2 degree.
Step 1: Loosen moveable base bolts (or motor base bolts) and move sheaves close
to facilitate installation of belt.SeeTable 1 for minimum installation
allowance. If the design has fixed, non-moveable centers (not a
recommended design) do the following:
A. Mount one sheave onto the shaft loosely and put the belt on it.
B. Put the other sheave into the belt loop and slip it onto the other shaft (bushing loosely
installed).
C.Align the drive and tighten the bushings.
Step 2: Move all the slack in multiple belt drives to one side, then remove the slack
(increase centers).Then rotate sheaves several revolutions by hand to
equalize belt tensions.
Step 3:Tension belts as outlined on reverse side of this page.
Note:If BROWNING®Tension Checker is used, only 35 lbs.maximum force (F) can
be obtained. If higher forces are required, use other means such as dead
weights or hydraulic pressure to apply a known force.
Belt No.
4L, A D
26-35 0.8 -
38-55 0.8 -
60-85 0.8 -
90 - 112 1.0 -
120 - 144 1.0 2.0
158 - 180 - 2.0
195-210 - 2.0
240 - 2.5
220 - 300 - 2.5
330 - 390 - 2.5
420 and over - 3.0
250 - 475
500-710
750 - 1060
1120 - 1250
1320 - 1700
1800 - 2000
2120 - 2240
2360
2500 - 2650
2800 - 3000
3150
3350 - 3550
3750
4000 - 5000
5600 - - 2.0 6.0
- - 2.0 5.5
- - 2.0 4.5
- 1.5 2.0 4.0
- 1.2 1.8 4.0
- 1.2 1.8 3.5
- 1.2 1.8 3.2
- 1.2 1.8 3.0
- 1.2 1.8 2.8
- 1.0 1.8 2.5
0.8 1.0 1.5 2.2
0.8 1.0 1.5 1.8
0.8 1.0 1.5 1.5
0.8 1.0 - 1.2
0.5 - - 1.0
- 2.3 11/2%of Belt Length
3V 5V 8V All Sections
1.5 2.0 5.0
- 2.0 6.0
1.5 2.0 4.0
1.5 2.0 4.5
1.3 1.5 3.0
1.3 2.0 3.5
1.3 1.5 2.0
1.3 1.5 2.5
1.0 - 1.0
1.0 1.5 1.5
TABLE 1 CENTER DISTANCE ALLOWANCE
Allowance fo r Installatio n Allowance fo r
Initial Tensio ning
and Subsequent Take-
Up
5L, B C A ll Sections
V-BELT INSTALLATION INSTRUCTIONS
Figure 1

United Electric Company, L.P. • 501 Galveston • Wichita Falls, TX 76301 • 940-397-2100 • Fax [phone]
Part #: 010-200002-000 1-16-07
GRILLE PLENUM INSTALLATION
1. Mount grille plenum to front of cabinet using prepunched holes in plenum. Note: Some holes are 1/4 in. diameter and
others are 1/2” diameter.Locations match screws in front of unit.
2.Remove screws from front of cabinet that line up with 1/4 in.holes in plenum. Do not remove remaining screws.The
1/2” holes in grille plenum clear the 1/2” screw heads in unit. 3. Line up the grille plenum on front of unit.(Fig. 10).
4. Replace the screws removed previously, by reaching through grille opening.Tighten screws to secure the plenum.
5. Place grille in opening of plenum. Secure grille using screws provided.
6.Appropriate grille louvers may be adjusted manually, updown, right-Ieft, to provide 4-way air deflection.
MIXING BOX INSTALLATION (Fig.11)
Before Installation
Note: See dimensions Table 1 and Fig. 11. Inspect desired
installation location. Determine if space provides sufficient
work and safety clearances. If determined that ample space
is available in work area, make all sheet metal connections
and attachments prior to moving completed assembly to
duct connection site.
1. One side of mixing box has 2 plastic plugs.These may be
removed and moved to opposite end to plug unused 7/8”
holes in end of cabinet where 5/6” rods do not extend out
of cabinet.
2. Choose side of cabinet most accessible for servicing to
mount damper motor.Remove bolt for each damper shaft
on that end and extend shaft until second bolt hole in
shaft lines up with hole in damper blade. Replace bolt.
Connect 2 shafts with the 2 crankarms, and the 5/16”
linkage rod furnished with mixing box.
3. Mount damper motor on the selected side of mixing box
cabinet by drilling necessary holes and securing with either
screws or bolts and nuts.
Installation
1.Attach mixing box to unit return-air duct flange.Vertical
duct flange connections at rear of unit are prepunched to
match prepunched holes in mixing boxes. Mixing boxes
may be mounted for top-rear or bottom-rear connections.
2.After vertical flange has been bolted, drill holes in
horizon tal duct flanges. Secure with screws or bolts and
nuts.
3. Use field-supplied hardware to connect motor shaft to
one of the damper shafts.
4. Connect duct to the 1" duct flange provided on mixing
box for return and fresh air makeups as needed.
Note:Steps l,2,3 above may follow steps l, 2 under Before
Installation if preferred.

United Electric Company, L.P. • 501 Galveston • Wichita Falls, TX 76301 • 940-397-2100 • Fax [phone]
14
1-16-07 Part #: 010-200002-000
Fig 11 - Mixing Box Dimensions