2
189159001
Flux for use with copper-to-steel connections.
Principal equipment needed for installing this kit is listed in the following table. Equivalent items may
be substituted.
REQUIRED EQUIPMENT
Item
No.
Name and Description
Use
1
Torch, Oxy-fuel (acetylene, propane, etc.)
Brazing
2
Torch Tips size No. 2 or 3
Brazing
3
Vacuum pump and gaging with 50-micron blank-off pressure. Alternately a pump
having 28.5; HD minimum.
Removing air
from system
4
Refrigerant recovery system
Removing refrig-
erant from sys-
tem
5
Charging cylinder, visual indicating type with a refrigerant R-12 or R-502 scale
and temperature correction curve, or a closed container with an accurate scale.
Charging equipment must be accurate to .025 oz.
Charging the
reworked system
6
Pinch-off tool
To seal process
lines after
charging
7
Ammeter, clamp-on type 0–50 amp range
To measure
power
8
Voltmeter, 0–300 VAC
To measure line
voltage
9
Ohmmeter, 0–10 and 100,000 ohms
To check resis-
tance of electrical
circuitry
10
Leak detector, capable of detecting at least 1/2-ounce/year.
To detect refriger-
ant leaks
11
Dry Nitrogen (–75
°
F dewpoint)
To purge system
before charging
12
Tap line valve (2)
To make connec-
tion to refrigerant
recovery system
DISASSEMBLY
1. Disconnect electrical power to the unit.
2. Melt ice bank and drain the tank.
3. Remove four screws securing unit top cover, then lift cover straight up off unit.
Unit with sealed evaporator tank only.
A.
Disconnect agitator motor ground wire and power cord.
B.
Disconnect product inlet line swivel nut connectors from product coil line fittings on agitator motor and
cover assembly. MAKE SURE LINES ARE LABELED FOR IDENTIFICATION SO THAT THEY MAY
BE RECONNECTED TO PROPER FITTINGS ON COVER ASSEMBLY.
C.
Remove hex nuts securing product coil line fittings to cover assembly.
D.
Remove screws securing cover assembly to unit, then lift cover straight up to remove. BE CAREFUL
NOT TO LOSE RUBBER WASHERS ON COIL FITTINGS.
Содержание Universal 750 Pre-Mix
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