ISCO 934 User manual

Instruction Sheet 69-9003-547
Instruction Sh eet 69-9003-547
FR Backup Battery
Installation Guide
Overview
This instruction sheet describes how to install a
Model 934 Nickel-Cadmium Battery in a 3700FR, 3710FR,
or 6712FR refrigerator.
During normal operation, the refrigerator is powered
by AC. The refrigerator’s internal electronics supply DC
power to the sampler controller and a charging current
to maintain the charge on the backup battery. If AC
power fails, DC power to the sampler controller is then
supplied by the backup battery. The battery recharges
after AC power is restored.
Note
The backup battery powers only the sampler controller
when AC power is lost. The cooling system will not
operate until AC power is restored.
Before installing the Model 934 battery, verify that it
will power the sampler controller. Attach it to the sam-
pler power connector and press the ON button. If it
powers the sampler, proceed with the installation. If the
battery does not power the sampler, charge the battery
and try again before installing it in the refrigerator.
CAUTION
Do not install other types of batteries. The charging
circuit is intended for Model 934 Nickel-Cadmium
Battery Packs only. Installing other types, such as
lead-acid batteries, may damage the refrigerator or
battery.
Installation Procedure
You will require the following items to install the FR
Backup Battery:
• 66-6700-135 Battery Backup Kit
· (1) 60-1684-040 NiCad Battery Assembly
· (1) Battery Serial Number Label
· (4) 090-4026-00 1” foam fasteners
• Tools
· #2 Phillips Screwdriver
· Needle-nose Pliers
· Voltmeter (optional)
CAUTION
There is a risk of electric shock! Disconnect the power
before removing the lower back panel of the
refrigerator. Only trained service personnel should
remove the case top.
1. Remove the three screws that mount the Tem-
perature Control Box assembly (Figure 1). Pull
the Temperature Control Box assembly away
from the refrigerator interior. It is not necessary
to remove any cables.
Figure 1: Temperature Control Box Assembly
2. Locate the ground post behind the Control Box.
It is important that the connectors attached to
this post are routed parallel to the Temperature
Control Box and Backup Battery. If necessary,
loosen the retaining nuts and reposition the wire
connectors. Tighten after repositioning the con-
nectors.
Note
If the ground connectors are pointing towards the front or
rear of the refrigerator, they may interfere with installing
the battery or reinstalling the temperature control box.
3 Screws
Incorrect Correct
View From Side
View From Top

Instruction Sheet 69-9003-547
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www.isco.com
3. Attach the four foam fasteners to the bottom
surface of the Model 934 Battery.
4. Refer to Figure 2 and position the battery
between the two rubber draw latches. Note that
the battery cable is routed to the left, not
towards the fan.
Figure 2: Positioning the Battery
5. Pull the rubber draw latches over the catches
mounted on the sides of the battery. A pair of
needle-nose pliers will make this task much eas-
ier.
6. Remove the dustcap from the remaining open
connector on the back of the Temperature Con-
trol Box (Figure 3). Connect the battery to this
open connector.
Figure 3: Connecting the Battery
7. Reinstall the Temperature Control Box. Secure
the box with the three screws.
8. Inspect the interior before replacing the back
cover. Be certain that none of the cables are
pinched, and that the fan still rotates freely.
Replace the back cover.
9. Place the Serial Number label inside the refriger-
ator door.
10. Verify that the Backup Battery is installed cor-
rectly with the following test:
a. Make sure that the refrigerator AC line cord is
still unplugged.
b. Ensure that the sampler power connector is
attached to the sampler controller.
c. Press the ON button on the sampler control-
ler. If characters appear on the controller’s
display, you have successfully installed the
Backup Battery. If the controller will not oper-
ate, refer to the Refrigerated Sampler Instruc-
tion Manual to troubleshoot the problem.
If a sampler controller is not mounted on the refriger-
ator, test the installation with a voltmeter. Measure the
voltage between pins A (–) and B (+). The measured
voltage will vary according to the charge held by the
battery, but typically will read between 11.5 and 14.5
VDC.
Revision A, June 4, 2003
Four Foam Fasteners