Technical_reference - 第118页
Technical Service Manual 118 Revision Dat e: August 2004 RESERVOIR -PUM P UNIT: The Res ervoir-Pum p Unit is m ounted on the fr ame at the r ear of oven. The r eservoir is a 1.6 Gallon stainles s steel tank . T he leve l…
Technical Service Manual 117 Revision Date: August 2004
RADIATOR-FAN UNIT:
The radiator-fan units are at the rear of the Oven, mounted to the top frame under the sheet metal panels near the Off-
load (Exit) end of the Oven. Air is forced through the radiator by an axial fan.
Proper operation and cooling cannot take place without adequate airflow through the radiator-fan unit(s).
RADIATOR-FAN UNIT
Technical Service Manual 118 Revision Date: August 2004
RESERVOIR -PUMP UNIT:
The Reservoir-Pump Unit is mounted on the frame at the rear of oven.
The reservoir is a 1.6 Gallon stainless steel tank. The level switch in the reservoir monitors coolant level and the flow
switch checks return flow. The high-pressure switch trips at 60 PSI. A periodic check of the coolant level in the reservoir
is necessary.
The coolant return line is submerged near the bottom of the reservoir to reduce aeration of the coolant and to help assure
condensation of any returning vapor. The supply line to the coolant pump is in the bottom of the reservoir with a valve for
draining the system. The check valve in the supply line prevents coolant flow back to the reservoir. It also permits
cleaning the in-line strainer without draining the heat exchangers.
The flow switch and level switch are inputs for the Oven Control Program display of the LOW FLOW - LOW COOLANT
alarm.
TESTING:
The motor and supply circuit should be tested. If the Voltage is NOT within the 100 to 120V range recommended, the
transformer connections should be changed according to the changeover chart.
1) Allow the motor to reach a stable temperature with the oven hot.
2) The case temperature of the motor should not exceed 80°C. A normal Pump Motor Case temperature is
about 70 - 80°C at 115V.
3) The internal temperature cut off switch is set for 150° C. (case temperature about 100° C.)
4) If the motor is over temperature, operating at 100 to 116 VAC, it should be replaced.
Technical Service Manual 119 Revision Date: August 2004
EXTERNAL COOLING LIQUID SUPPLY OPTION
DESCRIPTION:
Heat in the cooling cells is absorbed by heat exchangers (two heat exchangers per top cooling cell) and conducted away
by the cooling fluid supplied by an external cooling system. The external cooling system should meet the following
specifications:
Supply Pressure: 20 to 40 psi [1.38 to 2.76 bar]
Flow Rate: 1 to 3 gpm [4.55 to 13.64 lpm]
Inlet Connection: 1/2" N.P.T
Outlet Connection: 1/2" N.P.T.
NOTE: Vitronics Soltec does not provide hose, clamps and hardware for connections between the reflow system and the
external cooling liquid supply (chiller, plant water, etc.).