Forma Scientific 1284 User manual

Forma Scientific, Inc.
P.O. Box 649
Marietta, Ohio 45750
U.S.A.
Telephone: [phone]
Telefax: [phone]
________________________________________
Models:
1284, 1285, 1286, 1287,
1288, 1290, and 1291
Biological Safety Cabinets
Class II, Type A/B3
Manual No: 7001284 Rev. 2
Read This Instruction Manual
Failure to read, understand and follow the instructions in this manual may result in
damage to the unit, injury to operating personnel and poor equipment performance.
Refer to the serial tag on the
rear cover of this manual

Forma Scientific, Inc.
ii
The material in this manual is for information purposes only. The contents and the product it
describes are subject to change without notice. Forma Scientific Inc. makes no representations or
warranties with respect to this manual. In no event shall Forma Scientific Inc. be held liable for any
damages, direct or incidental, arising out of or related to the use of this manual.
Manual No. 7001284
- HD-1179 4/14/98 heg Revised electrical schematics
2 3/18/98 deg Add models 1286, 1287, 1290 & 1291
- - - - 1/26/98 heg revised parts list per R. Wager
1 HD-1159 1/21/98 heg revised C50 to CWX lamps
0 - - - 9/3/97 heg New manual
REV ECN DATE BY DESCRIPTION

Forma Scientific, Inc.
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Forma Scientific, Inc.____________________________________________________Safety
iii
General Safety Notes used in this Manual
Alerts the user to important operating and/or maintenance
instructions. May be used alone or with other safety symbols.
Read the accompanying text carefully.
Potential electrical hazards. Only qualified persons should perform
the instructions and procedures associated with this symbol.
Hazard. Do not touch. Instructions associated with this symbol
should only be carried out when using special handing equipment
or when wearing special, protective clothing.
Potential biological hazards. Proper protective equipment and
procedures must be used when following instructions associated
with this symbol.
Reference O.S.H.A. Regulation 1910-1030.
Potentially hazardous energy. Equipment being maintained or
serviced must be turned off and locked off to prevent possible
injury. Reference O.S.H.A. Regulation 1910-147.
Hot surface(s) present which may cause burns to unprotected
skin or to materials which may be damaged by elevated
temperatures
Warning. Skin damage and/or eye injury can be caused by the
light produced by ultra violet light sources installed in this
equipment.
Never work in this unit with the ultra violet light operating.
√Always use the proper protective equipment (clothing, gloves, goggles etc.).
√Always dissipate extreme cold or heat, or wear protective clothing.
√Always follow good hygiene practices.
√Each individual is responsible for his/her own safety.

Forma Scientific, Inc.____________________________________________________Safety
iv

Forma Scientific, Inc.____________________________________________Contents
v
Table of Contents
Page
Section 1 - Receiving
1.1 Unpacking List.......................................................................... 1-1
Section 2 - Introduction
2.1 Description................................................................................ 2-1
2.2 Theory of Operation .................................................................. 2-1
Section 3 - Installation
3.1 Location .................................................................................... 3-1
3.2 Power Connection ..................................................................... 3-1
3.3 Plumbing Connection................................................................ 3-1
3.4 Exhaust Requirements............................................................... 3-2
a. Direct Room Exhaust ....................................................... 3-2
b. External Exhaust System.................................................. 3-2
3.5 Remote Alarm Contacts, Model 1288, 1290 and 1291............... 3-3
Section 4 - Operation
4.1 Control and Indicating Devices ................................................. 4-1
a. Blower Switch.................................................................. 4-1
b. Light Switch .................................................................... 4-1
c. Ultra-Violet Light (Optional) ........................................... 4-1
d. Alarm By-Pass Switch .................................................... 4-2
e. Static Pressure Gauge (in. w.g.) ....................................... 4-2
f. Blower Speed Control....................................................... 4-3
g. Measuring Blower Motor Voltage.................................... 4-3
h. Blower Motor/Lights Reset Button (15 Amp) .................. 4-3
i. Receptacle Fuses.............................................................. 4-4
j. Duplex Receptacles ......................................................... 4-4

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vi
Page
k. Drain Valve...................................................................... 4-4
l. Service Valves .................................................................. 4-5
m. Exhaust Filter Guard....................................................... 4-5
n. Sliding Window Assembly............................................... 4-5
Section 5 - General Cautions
5.1 General Caution Notes ......................................................................... 5-1
Section 6 - Cabinet Start-Up
6.1 General Recommendations ................................................................... 6-1
6.2 Use of Auxiliary Equipment in the Cabinet .......................................... 6-1
6.3 Cabinet Checklist ................................................................................. 6-1
6.4 Start-Up Procedure............................................................................... 6-2
Section 7 - Troubleshooting
7.1 Troubleshooting Guide......................................................................... 7-1
Section 8 - Maintenance
8.1 Checking the Static Pressure Gauge "Zero" .......................................... 8-1
8.2 Re-zeroing the Static Pressure Gauge .................................................. 8-1
8.3 Adjusting the Damper .......................................................................... 8-1
8.4 Biological Safety Cabinet Test Grids.................................................... 8-3
Section 9 - Service
9.1 Changing the Blower Motor (Model 1284 Series) ................................ 9-1
9.2 Changing the Blower Motor (Model 1286 Series) ............................... 9-2
Section 10 - Specifications...................................................................... 10-1
Section 11 - Accessories.......................................................................... 11-1
Section 12 - Parts List................................................................................ 12-1

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Page
Section 13 - Schematics......................................................................... 13-1
Section 14 - Warranty Information...................................................... 14-1

Forma Scientific, Inc._________________________________________________Receiving
1-1
Section 1 - Receiving
1.1 Unpacking List
Included with the Installation/Operation manual are four index buttons. These
buttons may be used to identify the type of service supplied to the service valves. Also
included in a separate bag, is a small Allen wrench (used for calibrating the Static Pressure
Gauge). This Allen wrench should be kept with the Manual at all times.

Forma Scientific, Inc._________________________________________________Receiving
1-2

Forma Scientific, Inc._______________________________________________Introduction
2-1
Section 2 - Introduction
2.1 Description
The Models 1284, 1285, 1286, 1287, 1288, 1290 and 1291 are Class II, Type A/B3
cabinets. The "Type A/B3" designation indicates two alternative uses of the cabinet. When
vented directly into the laboratory room, the unit serves as a "Type A" unit. When vented to
the outside atmosphere, through an in-house exhaust system, it serves as a "Type B3" unit.
Either usage of the cabinet offers both personnel and product protection.
The cabinet can be used in low-to-moderate risk environments and is designed to
NSF, International Standard #49. Class 1, 2, and 3 (low-to-moderate risk) agents are
described in the "Biosafety In Microbiological And Biomedical Laboratories"; CDC NIH
Publication No. (NIH) 88-8395, 3rd Edition, May 1993.
The cabinet's window permits the user to place auxiliary equipment and research
implements in the work area. The work opening must be held to 10" during all work
procedures. If the window is raised higher than the designated 10", the air barrier at the front
of the cabinet will be weakened and containment will be seriously impaired.
2.2 Theory of Operation
Clean, filtered air descends through the work zone with approximately 40% being
discharged through the exhaust HEPA filter with the remaining air recirculating through the
supply HEPA filter into the work area. Exhausted air is replaced by room air entering the
system through the front access opening.
Room air entering the work zone, through the front access opening, completes the
air barrier at the unit face and is responsible for the containment properties of the unit. All
work must be performed beyond the intake grille, on the solid work tray.

Forma Scientific, Inc.____________________________________________________Installation
2-2

Forma Scientific, Inc.________________________________________________Installation
3-1
Section 3 - Installation
3.1 Location
Locate the cabinet on a firm level surface in an area of minimum temperature
changes. The cabinet should be placed away from disruptive air currents caused by excessive
personnel traffic, air-conditioning or heating ductwork, or laboratory windows and doors.
Proper cabinet location is important, as drafts disrupt critical air flow characteristics and
allow room contaminants to enter or escape the cabinet work area.
Where space permits, fourteen inches should be allowed on each side of the cabinet
for maintenance, with a minimum of six inches on the right side of the cabinet for control
panel clearance. A twelve inch height should be available from the top of the cabinet to the
ceiling.
3.2 Power Connection
The electrical wall outlet(s) leading to the cabinet should be accessible for electrical
testing.
This cabinet is equipped with one power cord supplying power to the blower, lights
and receptacles. The cord should be plugged into a dedicated circuit.
Refer to Section 9 or to the data plate on the front of the unit for electrical
specifications.
3.3 Plumbing Connection
Two service valves are standard with each cabinet and are located on the right and
left side of the work station. All service valves are piped within the cabinet. External
connection is to 3/8" FPT coupling. Identification index buttons are supplied.
The cabinet will accommodate six service valves. The additional four service valves
may be purchased from Forma Scientific, Inc.
Explosive/flammable substances should never be used in
the cabinet, unless approved and monitored by a biological
safety officer or other qualified individual.

Forma Scientific, Inc.________________________________________________Installation
3-2
3.4 Exhaust Requirements
Filtered air from the cabinet may be exhausted directly into the room or vented to
the outside through an external exhaust system. Consult a biological safety officer or other
qualified individual for cabinet-type exhaust requirements.
a. Direct Room Exhaust
• Locate the exhaust filter guard on the top of the cabinet.
• Remove and save the ten acorn-type nuts and washers that secure the exhaust filter
guard.
• Remove the cardboard cover plate from the top of the cabinet.
• Replace the exhaust filter guard with the slope toward the front and the back of the unit.
Secure it with the ten acorn-type nuts and washers removed earlier.
b. External Exhaust System (For Class II Type B3Only)
The intermediate connection of the cabinet to any external exhaust system (in-
house) can be done by using an exhaust transition which is available from Forma Scientific,
Inc. The exhaust transition requires a minimum of 17-1/8" headroom from the top of the
cabinet.
The exhaust system should have safeguards against exhaust
failure. It is required that a biological safety officer or
industrial hygienist or other qualified individual review the
agents and chemicals used inside the cabinet to determine if
additional filtration treatment is necessary before venting to the
atmosphere.
The exhaust system must be capable of handling the volume of air passing through
the cabinet. Models 1284, 1285 and 1288 have an air volume of 356-390 CFM. Models
1286, 1287, 1290 and 1291 have an air volume of 530-581 CFM.

Forma Scientific, Inc.________________________________________________Installation
3-3
3.5 Remote Alarm Contacts (Models 1288, 1290 and 1291)
For facilities requiring remote alarms connected to biological safety cabinets, a relay
with Normally Open and Normally Closed contacts is installed in the blower electrical
circuit. The alarm contacts are pre-wired as shown in Figure 3-1 and on the Models
1288, 1290 and 1291 electrical schematics at the back of this manual.
The relay wires are identified N.O., N.C., and COM and are fitted with quick-connect
terminals with the connector mates installed. The connectors need only to be pulled
apart, then 18 to 22 gauge alarm wiring crimped onto the connectors, and the two halves
pushed back together. The wires may exit the control section of the cabinet through a
hole identified by the large black arrow in the illustration below.
Refer also to the wiring diagram on the following page to identify the location of
the remote alarm contact relay.
Figure 3-1

Forma Scientific, Inc.________________________________________________Installation
3-4

Forma Scientific, Inc._________________________________________________Operation
4-1
Section 4 - Operation
4.1 Control and Indicating
Devices (Refer To Figures
4-1, 4-2, and 4-3)
Before operating the cabinet
become familiar with the following
items:
a. Blower Switch: The blower
switch controls power to the internal
blower.
b. Light Switch: The “Lights”
switch controls power to the
fluorescent lamp or the optional
ultraviolet lamp (both lamps are
located in the work area).
c. Ultra-Violet Light (Optional)
Caution: Eyes or
skin should not be
exposed to ultra-violet
light.
Recommended usage is only when
the laboratory is not in use.
On cabinets equipped with the
optional ultra-violet germicidal light,
the dual purpose “Lights” switch
provides the following settings:
Series 1284 Class II A/B3 Biological Safety Cabinet
Sliding window
w/safety glass
Exhaust filter
grille
External Damper
Control
Speed control
access panel
Speed control
access panel
Dwyer, 0“ - 2”
mini-helic gauge
Removable side
paper catch, one
on each side
Drain valve
Removable vortex
channel
Front View
Exhaust HEPA filter
18 x 24 x 6
“””
Blower housing with
direct drive motor
Supply HEPA filter
18 x 48 x 6
“””
Fluorescent light
canopy Air diffuser screen
Extra valve ports,
two on each side
Removable rear
paper catch
Standard duplex
outlets, one on
each side
Front air intake
grille
Work surface
Standard key cocks,
one on each side
Side View
Figure 4-1
4 -foot Series, Models 1284, 1285, and 1288
"off" = center
"on" top = fluorescent lamp
"on" bottom = ultra-violet lamp

Forma Scientific, Inc._________________________________________________Operation
4-2
Either the fluorescent lamp or
the ultra-violent lamp may be lit
at one time.
d. Alarm By-Pass
Switch
The Alarm By-Pass
switch silences the audible
“Window Above 10 Inch”
alarm for five minutes. The
red visual indicator remains
illuminated. The alarm rings-
back to remind the operator
that the window is still open
more than 10 inches.
e. Static Pressure
Gauge (In. W.G.)
The static pressure
gauge measures the air
pressure differential across
the filters providing an
indication of filter "loading".
As the filters become loaded,
resistance increases and the
reading on the static pressure
gauge increases accordingly. When the reading
increases by 50% from original measurement, cabinet
airflow should be checked with a
Exhaust HEPA filter
24 x 24 x 6
“””
Blower housing with
direct drive motor
Supply HEPA filter
18 x 72 x 6
“””
Fluorescent light
canopy
Front air intake
grille
Work surface Extra valve ports,
two on each side
Removable rear
paper catch
Standard duplex
outlets, one on
each side
Standard key cocks,
one on each side
Side View
Sliding window
w/safety glass
Exhaust filter
grille
External Damper
Control
Removable side
paper catch, one
on each side
Drain valve
Series 1284 Class II A/B3 Biological Safety Cabinet
Removable vortex
channel
Speed control
access panel
Speed control
access panel
Dwyer, 0“ - 2”
mini-helic gauge
Front View
1.5
1.0
1.0
0
2.0
Figure 4-3
Figure 4-2
6-foot Series, Models 1286, 1287, 1290, and 1291

Forma Scientific, Inc._________________________________________________Operation
4-3
thermoanemometer. Replace the filters if proper airflow cannot be obtained.
The static pressure gauge should not be used as a direct measure of air flow.
f. Blower Speed Control
The blower speed control is accessed from the front of the control panel by removing
the access panel. The blower speed is adjusted by turning the screw on the variable resistor
mounted on the circuit board adjacent to the controller. (Refer to Figure 4-4) Turning the screw
clockwise increases air velocity; counter-clockwise decreases it.
The blower speed is factory set and should only be changed by a qualified
technician.
Live voltage is present on the control terminals of the switches
and dials on the front of the blower panel. Avoid touching these
controls when reaching into the control panel and making any
adjustments.
g. Measuring Blower Motor
Voltage
Both blower motor voltage and line
voltage are measured at the three
terminal connectors at the top of the
circuit board. Refer to Figure 4-5.
h. Blower Motor/Lights Reset
Button (15 Amp)
The reset button (located on
the left side of the control panel,
directly above the Receptacle fuses) is
an inline circuit breaker for the
internal blower motor and lighting. If
an overload occurs, the circuit breaker
will trip, and the button will protrude
from the panel. Depressing the button
resets the circuit breaker.
Figure 4-4

Forma Scientific, Inc._________________________________________________Operation
4-4
Note: Turn power off to the blower.
Turn power off to the
lighting.
Press the blower motor/lighting
reset button.
i. Receptacle Fuses (7 Amp, Models 1284, 1285 and 1288)
(3 Amp, Models 1286, 1287, 1290 and 1291)
The receptacle fuses (2) located directly below the Blower Motor/Lights Reset
Button, are for the receptacles only. If an overload occurs the fuses will open and will
require replacement.
Note: Turn the power off.
Unplug the unit.
 Replace the fuses - Forma P/N 230182, 7 Amp, ¼” x 1¼”
Forma P/N 230166, 3 Amp, ¼” x 1¼”
(Two spare fuses are located in a bracket on the back of the speed
control access panel, upper right corner of the front of the cabinet.)
j. Duplex Receptacles
Duplex receptacles (115 volts) are located on the left and right side wall of the work
station. Power is controlled by the receptacle switch located on the control panel. The
maximum load is 5 amps total for Models 1284, 1285 and 1288. Models 1286, 1287, 1290 and
1291 have a maximum load of 2 amps total. Models 1285 and 1287 are equipped with 2 single
European 230V receptacles.
k. Drain Valve
The drain valve, located on the right front side of the cabinet, is provided for the safe
drainage of the drain pan. This valve must remain closed while work is being performed in the
cabinet and be used only in the event of a major spill.
If a spill occurs, immediately consult a biological safety officer or
other qualified individual for proper procedures. To contain a spill,
connect a sealed hose from the drain valve to a sealed container.
Figure 4-5