Air-handling equipment will provide safe and reliable
service when operated within design specifications. The
equipment should be operated and serviced only by authorized personnel who have a thorough knowledge of system operation, safety devices and emergency procedures.
Good judgement should be used in applying any
manufacturer’s instructions to avoid injury to personnel
or damage to equipment and property.
time of delivery. Store in a clean, dry, and covered location. Do
not stack cartons. When unpacking units, care should be taken
that the inlet collars and water connections do not become
damaged.
CAUTION
Do not lift the unit by the drain pipes, water piping, or
metal duct. Units should be lifted using the mounting
brackets.
The 36IBAC unit packaging includes a base tray and an inverted box cover. Remove the box cover to fully expose the
unit.
The 36IBAN and 36IBAR units are packaged in cardboard
cartons. Open the carton top and fold the flaps back to gain access to the unit. Two people are required to lift the unit out of
the carton. These units are shipped with the grille attached, and
when setting the unit down, care must be taken to put it on a
clean, soft surface so as not to scratch the grille face.
The 36IBAS, M, L, and J units are packaged in cardboard
cartons. Open the carton top and cut the carton vertically on the
side where the duct collar is located. The grille is attached to
the unit and should not be removed. After cutting the side of
the carton, remove the unit from the box and set it on a clean
surface being careful not to scratch the grille.
Initial Inspection — Once items have been removed
from the carton, check carefully for damage to duct connections, coils, or controls. File damage claim immediately with
transportation agency and notify Carrier.
Installation Precaution — Check that construction de-
bris does not enter unit or ductwork. Accumulated dust and
construction debris distributed through the ductwork can adversely affect unit operation.
Codes — Install units in compliance with all applicable
code requirements.
PREINSTALLATION
GENERAL
The overhead induction beam distribution unit has been designed to give the customer many years of trouble free service.
Each unit contains a row or number of rows of aerodynamic
airflow nozzles located within the 20-gage heavy duty housing
assembly. These airflow nozzles deliver the proper ventilation
air from the main outdoor ventilation unit and produce an airflow profile across the coil. This aerodynamic airflow causes a
venturi effect across the coil face, which induces air from the
room across the coil surface. When cool water or hot water is
pumped through the coil, the induced airflow across the coil is
heated or cooled, then mixed with the primary airflow from the
nozzles to deliver conditioned airflow to the space.
Storage and Handling — Inspect for damage upon re-
ceipt. Shipping damage claims should be filed with shipper at
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53360006-01Printed in U.S.A.Form 36IB-3SIPg 13-14Replaces: 36IB-2SI
Prepare Jobsite for Unit Installation —
time and to reduce the possibility of costly errors, set up a complete sample installation in a typical room at jobsite. Check all
critical dimensions such as pipe, wire, and duct connection requirements. Refer to job drawings and product dimension
drawings as required (see Fig. 1-28). Instruct all trades in their
part of the installation.
Refer to Tables 1-6 and Fig. 1-28 for unit data.
To save
CAUTION
Prior to hanging the unit, remove the two cotter pins holding the supply/return section to the grille frame. Failure to
remove these pins will prevent access to coils and internal
workings of the units.
Fig. 1 — 36IBAC 2 x 2, All-Way Blow, 2-Pipe Unit Dimensions
3/4" FPT CWR/HWR
a36-579
LEGENDNOTES:
1. Dimensions shown in inches.
2. Drawing shows 2-pipe arrangement.
CWR — Chilled Water Return
CWS — Chilled Water Supply
FPT— Female Pipe Thread
HWR — Hot Water Return
HWS — Hot Water Supply
3/4" FPT CWS/HWS
TOP VIEW
FRONT VIEW
23.70
4" Ø
3.59
3/4" CONDENSATE
DRAIN
2.04
10.05
RIGHT SIDE VIEW
4.00
23.76
HANGING BAR
21.15
DIFFUSER PLATE
(SUPPLY/RETURN
GRILLE NOT SHOWN)
2
Fig. 2 — 36IBAC 2 x 2, All-Way Blow, 4-Pipe Unit Dimensions
23.76
HANGING BAR
4.00
10.05
23.76
23.70
3.59
4" Ø PRIMARY AIR
CONNECTION
3/4" FPT CWR
3/4" FPT CWS
3/4" CONDENSATE
DRAIN
12.09
1/2" FPT HWR
1/2" FPT HWS
FRONT VIEW
RIGHT SIDE VIEW
TOP VIEW
DIFFUSER PLATE
(SUPPLY/RETURN
GRILLE NOT SHOWN)
a36-580
LEGENDNOTES:
1. Dimensions shown in inches.
2. Drawing shows 4-pipe arrangement.
CWR — Chilled Water Return
CWS — Chilled Water Supply
FPT— Female Pipe Thread
HWR — Hot Water Return
HWS — Hot Water Supply
3
Fig. 3 — 36IBAC 4 x 4, All-Way Blow, 2-Pipe Unit Dimensions
3.20
4.11
17.89
3/4" Ø FPT WR
8" Ø SUPPLY AIR
3/4" PVC DRAIN
HANGING BRACKET
37.55
37.57
HANGING BRACKET
HANGING BRACKET
3/4" Ø FPT WS
FRONT VIEW
LEFT SIDE VIEW
TOP VIEW
a36-578
LEGENDNOTES:
1. Dimensions shown in inches.
2. Drawing shows 2-pipe arrangement.
FPT— Female Pipe Thread
WR— Water Return
WS— Water Supply
4
Fig. 4 — 36IBAC 4 x 4, All-Way Blow, 4-Pipe Unit Dimensions
3.20
4.11
17.89
3/4" Ø FPT CWR
1/2" Ø FPT HWR
8" Ø SUPPLY AIR
3/4" PVC DRAIN
HANGING BRACKET
35.95
36.14
HANGING BRACKET
HANGING BRACKET
1/2" Ø FPT HWS
3/4" Ø FPT CWS
FRONT VIEW
LEFT SIDE VIEW
TOP VIEW
a36-575
LEGENDNOTES:
1. Dimensions shown in inches.
2. Drawing shows 4-pipe arrangement.
CWR — Chilled Water Return
CWS — Chilled Water Supply
FPT— Female Pipe Thread
HWR — Hot Water Return
HWS — Hot Water Supply
5
21.4
1/2" O.D. HWS/CWS
1/2" O.D. HWR/CWR
3/4" CPVC DRAIN
CONNECTION
AIR BLOW DIRECTION
23.75
23.75
22.0
GRILLE
0.31"
HOLE
TYP OF 4
H
25.78
D
9.82
4"
PRIMARY AIR
CONNECTION
8.75
.88
1.7
9.37
1.31
14.9
PRESSURE TAP
HANGER BRACKET
REAR VIEW
LEFT SIDE VIEW
RIGHT SIDE VIEW
TOP VIEW
Fig. 5 — 36IBAS 2 x 2, 1-Way Blow, 2-Pipe LH Unit Dimensions
a36-592
LEGENDNOTES:
1. Dimensions shown in inches.
2. Drawing shows 2-pipe arrangement, left-hand piping connection; right hand connection would be opposite.
3. Hand is determined by standing on the front side of the unit
with the supply air blowing against the back of your head.
4. Front face of the unit is determined by the nozzle side (supply
air) side of the unit.
CWR — Chilled Water Return
CWS — Chilled Water Supply
HWR — Hot Water Return
HWS — Hot Water Supply
6
21.4
1/2" O.D. CWS
1/2" O.D. CWR
1/2" O.D. HWS
1/2" O.D. HWR
3/4" CPVC DRAIN
CONNECTION
AIR BLOW DIRECTION
23.75
23.75
22
GRILLE
0.31"
HOLE
TYP OF 4
H
25.78
D
9.82
4"
PRIMARY AIR
CONNECTION
8.75
.88
1.7
9.37
1.31
14.9
PRESSURE TAP
HANGER BRACKET
RIGHT SIDE VIEWLEFT SIDE VIEW
REAR VIEW
TOP VIEW
a36-593
Fig. 6 — 36IBAS 2 x 2, 1-Way Blow, 4-Pipe LH Unit Dimensions
LEGENDNOTES:
1. Dimensions shown in inches.
2. Drawing shows 4-pipe arrangement, left-hand piping connection; right hand connection would be opposite.
3. CW piping connection determines the hand of the unit.
4. Hand is determined by standing on the front side of the unit
with the supply air blowing against the back of your head.
5. Front face of the unit is determined by the nozzle side (supply
air) side of the unit.
CWR — Chilled Water Return
CWS — Chilled Water Supply
HWR — Hot Water Return
HWS — Hot Water Supply
7
Fig. 7 — 36IBAN 2 x 4, 1-Way Blow, 2-Pipe LH Unit Dimensions
11.52
a36-571
LEGENDNOTES:
1. Dimensions shown in inches.
2. Drawing shows 2-pipe arrangement, left-hand piping connection; right hand connection would be opposite.
3. CW piping connection determines the hand of the unit.
4. Hand is determined by standing on the front side of the unit
with the supply air blowing against the back of your head.
5. Front face of the unit is determined by the nozzle side (supply
air) side of the unit.
CWR — Chilled Water Return
CWS — Chilled Water Supply
FPT— Female Pipe Thread
HWR — Hot Water Return
HWS — Hot Water Supply
6" Ø PRIMARY AIR CONNECTION
1/2" Ø FPT CWR/HWR
0.75
1/2" Ø FPT CWS/HWS
3/4" PVC DRAIN
92.3
47.75
FRONT VIEW
HANGING BRACKET
Ø 0.50
Ø 0.50
23.75
23.75
SUPPLY AIR
BOTTOM VIEW
LEFT SIDE VIEW
RETURN AIR
SUPPLY/RETURN GRILLE
WITH OPTIONAL LOUVERED
SUPPLY AND RETURN
FACE SHOWN
8
Fig. 8 — 36IBAN 2 x 4, 1-Way Blow, 4-Pipe LH Unit Dimensions
1/2" FPT HWR
a36-574
LEGENDNOTES:
1. Dimensions shown in inches.
2. Drawing shows 4-pipe arrangement, left-hand piping connection; right hand connection would be opposite.
3. CW piping connection determines the hand of the unit.
4. Hand is determined by standing on the front side of the unit
with the supply air blowing against the back of your head.
5. Front face of the unit is determined by the nozzle side (supply
air) side of the unit.
CWR — Chilled Water Return
CWS — Chilled Water Supply
FPT— Female Pipe Thread
HWR — Hot Water Return
HWS — Hot Water Supply
11.52
1/2" FPT HWS
1/2" Ø HANGING HOLES
TYPICAL OF 4
1/2" FPT CWR
1/2" FPT CWS
12.00
3/4" PVC DRAIN
93.
FRONT VIEW
3
12.50
57.9
00.9
7.75
6" Ø
RETURN AIR
RIGHT SIDE VIEW
23.75
6" Ø PRIMARY AIR
CONNECTION
TOP VIEW
23.75
47.75
SUPPLY AIR
9
Fig. 9 — 36IBAN 1 x 4, 1-Way Blow, 2-Pipe RH Unit Dimensions
47.75
62.4
1/2" FPT WR
1/2" FPT WS
3/4" PVC DRAIN
CONNECTION
4" Ø DUCT CONNECTION
4.00
11.75
13.89
SUPPLY AIR
RETURN AIR
REAR VIEW
LEFT SIDE VIEW
TOP VIEW
SUPPLY/RETURN GRILLE
WITH OPTIONAL LOUVERED
SUPPLY AND RETURN
FACE SHOWN
a36-573
LEGENDNOTES:
1. Dimensions shown in inches.
2. Drawing shows 2-pipe arrangement, right-hand piping connection; left hand connection would be opposite.
3. Hand is determined by standing on the front side of the unit
with the supply air blowing against the back of your head.
4. Front face of the unit is determined by the nozzle side (supply
air) side of the unit.
FPT— Female Pipe Thread
WR— Water Return
WS— Water Supply
10
Fig. 10 — 36IBAN 1 x 4, 1-Way Blow, 4-Pipe RH Unit Dimensions
1/2" FPT HWR
a36-572
LEGENDNOTES:
1. Dimensions shown in inches.
2. Drawing shows 4-pipe arrangement, right-hand piping connection; left hand connection would be opposite.
3. CW piping connection determines the hand of the unit.
4. Hand is determined by standing on the front side of the unit
with the supply air blowing against the back of your head.
5. Front face of the unit is determined by the nozzle side (supply
air) side of the unit.
CWR — Chilled Water Return
CWS — Chilled Water Supply
FPT— Female Pipe Thread
HWR — Hot Water Return
HWS — Hot Water Supply
1/2" FPT HWS
2.00
8.00
1/2" Ø FPT CWR
1/2" Ø FPT CWS
3/4" Ø PVC DRAIN
4.00
4" Ø
1/2" Ø HWR
1/2" Ø HWS
SUPPLY AIR
1.50
47.75
REAR VIEW
1/4" Ø HANGING HOLE
TYPICAL OF FOUR
9.00
RETURN AIR
LEFT SIDE VIEW
32.4
13.86
TOP VIEW
11.75
11
DUCT CONNECTION
Fig. 11 — 36IBAR 2 x 4, 1-Way Blow, 2-Pipe, RH Unit Dimensions
A36-589
COLLARS
H
DIMENSION (in.)DDIMENSION (in.)
None11.534.6
3 in.14.537.6
4 in.15.538.6
5 in.16.539.6
6 in.17.5310.6
LEGEND NOTES:
1. Dimensions shown in inches.
2. Drawing shows 2-pipe arrangement, right-hand piping connection; left hand connection would be opposite.
3. Hand is determined by standing on the front side of the unit
with the supply air blowing against the back of your head.
4. Front face of the unit is determined by the nozzle side (supply
air) side of the unit.
CWR — Chilled Water Return
CWS — Chilled Water Supply
6"
47.72
SUPPLY AIR BLOW
DIRECTION
23.72
GRILLE
H
21.00
D
1/2" O.D. CWR
1/2" O.D. CWS
3/4" CPVC DRAIN
HANGING BRACKET
PRESSURE TAP
21.00
H
HANGING BRACKET
12
PRESSURE TAP
HANGING BRACKETS
47.72
23.72
6"
DUCT CONNECTION
GRILLE
21.00
H
21.00
D
H
1/2" O.D. CWS
3/4" CPVC DRAIN
1/2" O.D. HWR
1/2" O.D. HWS
1/2" O.D. CWR
SUPPLY AIR BLOW
DIRECTION
Fig. 12 — 36IBAR 2 x 4, 1-Way Blow, 4-Pipe, RH Unit Dimensions
A36-590
COLLARS
H
DIMENSION (in.)DDIMENSION (in.)
None11.534.6
3 in.14.537.6
4 in.15.538.6
5 in.16.539.6
6 in.17.5310.6
LEGENDNOTES:
1. Dimensions shown in inches.
2. Drawing shows 4-pipe arrangement, right-hand piping connection; left hand connection would be opposite.
3. CW piping connection determines the hand of the unit.
4. Hand is determined by standing on the front side of the unit with
the supply air blowing against the back of your head.
5. Front face of the unit is determined by the nozzle side (supply
air) side of the unit.
CWR — Chilled Water Return
CWS — Chilled Water Supply
HWR — Hot Water Return
HWS — Hot Water Supply
13
8.1
A36-587
Fig. 13 — 36IBAM 2 x 2, 1-Way Blow, 2-Pipe, RH Unit Dimensions
COLLARS
H
DIMENSION (in.)DDIMENSION (in.)
None15.14.5
3 in.18.17.5
4 in.19.18.5
5 in.20.19.5
6 in.21.110.5
LEGENDNOTES:
1. Dimensions shown in inches.
2. Drawing shows 2-pipe arrangement, right-hand piping connection; left hand connection would be opposite.
3. Hand is determined by standing on the front side of the unit with
the supply air blowing against the back of your head.
4. Front face of the unit is determined by the nozzle side (supply air)
side of the unit.
CWR — Chilled Water Return
CWS — Chilled Water Supply
HWR — Hot Water Return
HWS — Hot Water Supply
21
9.55
4"
PRIMARY AIR
21
1.42
1/2" O.D. HWR/CWR
PRESSURE TAP
9.55
CONNECTION
2
9.16
D
7
8.1
2.64
1/2" O.D. HWS/CWS
H
3/4" CPVC DRAIN
CONNECTION
23.75
2.44
21
4.6
23.75
22
SUPPLY AIR BLOW
DIRECTION
HANGER BRACKET
D
GRILLE ATTACHED
14
21
2.44
4.6
HANGER BRACKET
3/4" CPVC DRAIN
CONNECTION
PRESSURE TAP
1/2" O.D. HWR
1/2" O.D. HWS
1/2" O.D. CWR
1/2" O.D. CWS
2
9.55
9.16
D
4"
PRIMARY AIR
CONNECTION
D
21
H
2.64
1.42
9.55
8.1
7
8.1
23.75
23.75
22
21
GRILLE ATTACHED
SUPPLY AIR BLOW
DIRECTION
A36-588
Fig. 14 — 36IBAM 2 x 2, 1-Way Blow, 4-Pipe, RH Unit Dimensions
COLLARS
H
DIMENSION (in.)DDIMENSION (in.)
None15.14.5
3 in.18.17.5
4 in.19.18.5
5 in.20.19.5
6 in.21.110.5
LEGENDNOTES:
1. Dimensions shown in inches.
2. Drawing shows 4-pipe arrangement, right-hand piping connection; left hand connection would be opposite.
3. CW piping connection determines the hand of the unit.
4. Hand is determined by standing on the front side of the unit with
the supply air blowing against the back of your head.
5. Front face of the unit is determined by the nozzle side (supply
air) side of the unit.
CWR — Chilled Water Return
CWS — Chilled Water Supply
HWR — Hot Water Return
HWS — Hot Water Supply
15
SIDE VIEW
FRONT VIEW
TOP VIEW
HANGING BRACKET (TYPICAL)
LEGEND
NOTE: Dimensions shown in inches.
CWR — Chilled Water Return
CWS — Chilled Water Supply
HWR — Hot Water Return
HWS — Hot Water Supply
DIMENSIONH (in.)D (in.)CSCR
Standard143.154.157.5
Extended
Ver si on
176.157.1510.5
Fig. 15 — 36IBAL 2 x 2, 2-Way Blow, 2-Pipe Unit Dimensions
a36-595
16
SIDE VIEW
FRONT VIEW
TOP VIEW
HANGING BRACKET (TYPICAL)
Fig. 16 — 36IBAL 4 x 2, 2-Way Blow, 2-Pipe Unit Dimensions
LEGEND
NOTE: Dimensions shown in inches.
CWR — Chilled Water Return
CWS — Chilled Water Supply
HWR — Hot Water Return
HWS — Hot Water Supply
DIMENSIONH (in.)D (in.)CSCR
Standard143.154.157.5
Extended
Ver sion
176.157.1510.5
a36-596
17
FRONT VIEW
Fig. 17 — 36IBAL 6 x 2, 2-Way Blow, 2-Pipe Unit Dimensions
LEGEND
NOTE: Dimensions shown in inches.
CWR — Chilled Water Return
CWS — Chilled Water Supply
HWR — Hot Water Return
HWS — Hot Water Supply
DIMENSIONH (in.)D (in.)CSCR
Standard143.154.157.5
Extended
Version
176.157.1510.5
a36-597
SIDE VIEW
HANGING BRACKET (TYPICAL)
TOP VIEW
18
FRONT VIEW
Fig. 18 — 36IBAL 8 x 2, 2-Way Blow, 2-Pipe Unit Dimensions
LEGEND
NOTE: Dimensions shown in inches.
CWR — Chilled Water Return
CWS — Chilled Water Supply
HWR — Hot Water Return
HWS — Hot Water Supply
DIMENSIONH (in.)D (in.)CSCR
Standard143.154.157.5
Extended
Ver si on
176.157.1510.5
a36-598
SIDE VIEW
HANGING BRACKET (TYPICAL)
TOP VIEW
19
FRONT VIEW
TOP VIEW
SIDE VIEW
HANGING BRACKET (TYPICAL)
Fig. 19 — 36IBAL 2 x 2, 2-Way Blow, 4-Pipe Unit Dimensions
LEGEND
NOTE: Dimensions shown in inches.
CWR — Chilled Water Return
CWS — Chilled Water Supply
HWR — Hot Water Return
HWS — Hot Water Supply
It is recommended that unit locations be separated by a min-
1
/
2
4
1
/
2
4
imum of 8 ft from grille edge to grille edge.
Step 1 — Install Unit
36IBAC — There are two mounting brackets bolted to each
side of the unit. These brackets will accept field-supplied 1/4-in.
all-thread rod to facilitate the hanging of this unit. These brackets can also be used for wire hanging systems such as Sheet
Metal and Air Conditioning Contractors’ National Association
(SMACNA) approved hanging systems. Set the unit on a cable
lift or other lifting device to lift it above the ceiling level. Be
careful to ensure the lifting platform is wide enough to reach
the outer shell of the unit. The center drain pan and coil should
not be used to support the unit.
To hang the unit, the factory recommends securing two strut
channels, 24 in. apart, to the building structure where the unit is
to be hung. Secure two
20 in. apart on each channel so that they hang down to the top
of where the unit is to be hung. Raise the unit and screw the allthread rod or wire hanging from the building channels into the
mounting brackets. The rod should be secured with a washer
and lock nut.
Final elevation and horizontal adjustments can be made to
align the unit with the diffuser. The mounting brackets have
holes for the rod approximately every inch. The unit can be adjusted to meet the ceiling grid using these bracket holes, and by
raising and lowering the unit to align with the ceiling by adjusting the nuts on the all-thread rod or wire on the building
channel.
36IBAN — There are two holes (
for 36IBANB) on each side of the unit to facilitate hanging
with an "S" hook and cable or chain to the building support.
The drain pan and coil should not be used to support the unit.
1
/4-in. all-thread rods or wire about
1
/4 in. for 36IBANA,
1
/2 in.
30
These units should be hung in a manner to align with the
planned ceiling grid. Final elevation and horizontal adjustments can be made to align the diffuser in the ceiling grid by
raising and lowering the unit to the ceiling grid.
36IBAS,M,R,L,J — There is a hanging bracket with two
5
/
in. holes on each side of the unit to facilitate hanging with 1/4in. all-thread rod or wire. The drain pan and coil should not be
used to support the unit. To hang the unit, hang four
1
/4-in. allthread rod or wire from the building support, aligning the unit
with the planned ceiling grid. Final elevation and horizontal adjustments can be made to align the diffuser in the ceiling grid
by raising and lowering the unit to the ceiling grid.
Step 2 — Connect Induction Beams to the Piping System —
fore the ceiling grid is in place. It is important to connect the
supply water to the supply water connections and return water
to the return water connections. These connections have been
labeled on the unit pipe stub-outs. Be sure all air is vented at the
coil before making final connections at the return.
Pipes for chilled water systems must be covered with sealed
insulation to prevent condensation. Both the supply and return
pipework should be insulated.
Induction beams must be capable of being shut off and having flow controlled. A valve set providing these functions
should be field-supplied and installed on every zone.
In order to permit adjustment of the induction beam in vertical and lateral directions, it may be practical to connect it using
flexible pipes. Flexible pipes offer greater resistance to flow
than fixed pipes; therefore, it may be suitable to select flexible
pipes with larger dimensions than fixed pipes.
All piping connections can be made be-
Step 3 — Connect Induction Beams to the
Condensate Drainage System — The 36IB units
have one
piping to a condensate drain, the unit should be supplied with a
plug or a float switch (shipped separately). The float switch
should be wired in series to a room controller to shut off the
coil valve if sufficient condensate should build up. If multiple
units are used in a single zone, the switches should be wired in
series to the room controller. If the unit is piped to a condensate
removal system, the unit may be supplied with a trap and connection fitting (shipped separately). A height extension collar
option may be factory provided and installed to give additional
height for gravity drainage. A standard unit provides 3
height without any extension collar for gravity drainage of condensate. For gravity drainage, a slope of
densate pipe length is required.
3
/4-in. condensate drain pan connection. When not
3
/4 in. of
1
/4 in. per foot of con-
Step 4 — Connect Induction Beams to the Primary Air Ducting System —
lated flexible duct can be used to connect the primary air ductwork to the unit. Make sure that the flexible duct connection to
the unit is sealed air tight. A field-supplied balancing damper
should be provided in this primary air duct to facilitate the air
supply balancing of each unit to the scheduled static pressure at
the unit inlet.
A short section of insu-
ADJUSTMENT
Airflow Balancing Procedure —
system for the induction beams, it is only necessary to adjust
16
the inlet static pressure at each induction unit to the values
shown on the schedule for each room. The inlet static pressure
should be read at the duct connection to each induction beam.
A static pressure tap is supplied on each induction unit for a
balancer to take their readings at. The balancing contractor
should attach a magnehelic gage to the factory-mounted pressure tap and adjust the volume damper to the proper inlet
pressure.
If multiple induction beams in a given space are not accessible to measure the static pressure at the inlet to each unit, they
can be balanced as a group, as follows.
1. Add up all the scheduled primary air to each induction
beam on a given primary air duct branch feeding a common area.
2. Adjust the damper to that branch to allow the primary air
quantity determined above to the space. Since induction
beams all operate linearly at static pressures between 0.4
and 1.0 in. wg, all terminals on the primary air branch to a
given space will operate at the common static pressure
available in that branch duct that will produce the total
primary air measured.
3. Total supply air is dependent on the primary air and static
pressure at the unit. It can not be directly measured.
To balance the air
MAINTENANCE
Once per year, remove the center core of grille and vacuum
off the internal heating and cooling coil with a soft vacuum
brush. The removable grille can also be vacuumed off as required. If the unit was provided with a lint screen filter installed, remove the filter and vacuum off the lint.
The diffuser is used to access the coil. No tools are required.
On 36IBAC units, the diffuser is spring loaded to allow access
by pushing from one side. Pull back on the face core and remove the face core out of its channel frame. The unit contains a
quick spring latch arrangement that slides in and out of the diffuser frame. On 36IBAM,N,R,S,L,J units, the coil can be accessed by removing the fasteners located on the face of the
grille. Supply and return face sections are separate and can be
removed.
Condensate Float Switch Wiring — The float
switch is a normally closed dry contact electric circuit. When
the float senses water, the circuit opens and the motorized water control valve is deactivated (closed). If the water control
valve is a power open/spring return device, no relay is required
to reset the valve. If the water control valve is a power open/
power close device, a single pole double throw relay will be
required to allow for automatic reset.