NuAire LabGard NU-560-400, Operation & Maintenance Manual

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OM0295
Rev 2 September 2020 Page 14 of 103
As previously stated NuAire doesn't recommend the use of natural gas within the LFBSC and ASSUMES NO
RESPONSIBILITY FOR ITS USE. USE AT YOUR OWN RISK. The Bunsen burner flame within the LFBSC not only
contributes to heat build-up; is also disrupts the laminar air stream, which must be maintained for maximum
efficiency. IF THE PROCEDURE DEMANDS USE OF A FLAME, A BUNSEN BURNER WITH ON DEMAND IGNITION IS
STRONGLY RECOMMENDED. DO NOT USE CONSTANT FLAME GAS BURNERS. During use, the Bunsen burner
should be placed to the rear of the workspace where resulting air turbulence will have a minimal effect.
5.2.5 Plumbing Services
Service ball valves with the type of service specified by the removable button on the handle are located in the
work zone. The service ball valves are not recommended for pressure over 75 p.s.i. (5.2 BAR). Reducing valves
should be installed external to the cabinet if necessary. Service ball valves should never be used for flammable
gasses or oxygen service. A special needle valve for oxygen service or certified valve is required and available upon
request.
External connection is to 3/8 inch NPT coupling in the inner sidewalls. Connection to plant utilities should be made
with proper materials for the individual service and according to National and/or Local codes. Observe all labels
pertaining to the type of service and operating pressure.
Remote controlled needle-valve plumbing fixtures can be optionally provided within the interior sidewalls. Control
handles are located externally on the vertical airfoil. Service outlets within the interior have serrated tapered
fittings designed for hose connections with the remote controlled needle valve plumbing fixtures. NuAire provides
for rear, bottom, or top connections of plumbing services to plant utilities. Connection from the needle valve
assembly to the welded exit coupling is accomplished with the supplied 3/8 inch soft copper tubing as standard
(alternative materials to meet local codes are available upon request). The needle valves are not recommended
for working pressure in excess of 125 p.s.i. (8.6 BAR).
5.2.6 Electrical Services
The NU-560 series Biosafety Cabinets may be "hardwired" (optional) or plugged into an outlet with protective
earthing connection with the standard power cord. The cabinet requires 115VAC, 60Hz single phase (correct rating
varies per cabinet size, reference Electrical/Environmental Requirements). It is recommended that power to the
cabinet, whether hardwired or plug connected, be on its own branch circuit, protected with a circuit breaker at the
distribution panel near the cabinet.
A surge protector is strongly recommended
if you are experiencing power
related faults.
PLEASE NOTE THIS CABINET CONTAINS ELECTRONIC BALLASTS FOR THE FLUORESCENT LIGHTING. ELECTRONIC
BALLASTS OPERATE WITH HIGH INRUSH CURRENT. IT IS NOT RECOMMENDED TO USE THIS PRODUCT WITH
GROUND FAULT CIRCUIT INTERRUPTERS (GFCI'S) BECAUSE THE BALLASTS MAY CAUSE THE GFCI TO TRIP.
If a "hardwired" (conduit) connection is desired, an electrical junction box is provided on the top of the
workstation with a removable cover. All wiring connections to the junction box should be done according to the
National Electrical Code as well as stated items below per the UL 61010-1 and/or local codes by a qualified
electrician.
Items required for the “hardwired” connection:
1) A switch or circuit breaker must be included in the installation;
2) It must be suitably location and easily reached;
3) It must be marked as the disconnecting device for the unit.