GAYMAR
Medi-Therm III System Wiring Manual
System Wiring Manual
8 Pages
Preview
Page 1
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P/N 11028-000 10/00
Medi-Therm® III SERVICE MANUAL
ATTENTION Static-Sensitive Devices
Figure 19-Power supply board schematic (sheet 1 of 3) 82
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P/N 11028-000 10/00
Medi-Therm® III SERVICE MANUAL
Figure 20-Control/display board schematic (sheet 2 of 3) 83
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P/N 11028-000 10/00
Medi-Therm® III SERVICE MANUAL
Figure 21-Control/display board schematic (sheet 3 of 3) 84
The control/display board may not be fully populated.
Figure 22-Control/display board Designator
Description
GAYMAR P/N
Designator
Description
GAYMAR P/N
Designator
Description
GAYMAR P/N
U1, U3
LED Lt. Bar, HLMP-2885
90761-026
U53, U54, U64
IC, 74HC377
90886-088
R4
Resistor,750 ohms, 5%, 1/4W
90092-046
U2, U4, U8
LED Lt. Bar, HLMP-2785
90761-003
U55
IC, 74HC541
90886-089
R6
Resistor, 12.4K, 1%, 1/8W
90092-343
U7, U33, U35
LED Lt. Bar, HLMP-2685
90761-002
U58
IC, 74HC32
90886-039
R7
Resistor, 22.6K, 1%, 1/8W
90092-344
U9, U20, U23
LED Lt. Bar, HLMP-2755
90761-005
U60-U62
IC, ULN2003A
90886-054
R8
Resistor, 10.0K, 1%, 1/8W
90092-368
U10, U29, U47
LED Lt. Bar, HLMP-2450
90761-027
ALARM
Alarm, MCP320B2
90919-001
R9
Resistor, 2K, 5%, 1/4W
90092-056
U12-U14, U16-U19
LED Digit, HDSP-5551
90761-000
Capacitor, 0.1 µF
90701-169
R10
Resistor, 66.5K, 1%, 1/8W
90092-345
U15, U21, U28
LED Lt. Bar, HLMP-2655
90761-001
C2, C4, C6, C9-C14,C18, C23C25, C27, C28, C30, C31, C33, C34, C36, C38, C39, C42-C54, C57-C61
R11
Resistor, 2.00K, 1%, 1/8W
90092-364
U41-U44
LED Digit, HDSP-7511
90761-006
C5
Capacitor, 330 pF
90701-167
R12
Resistor, 816 ohms, 0.1%, 1/8W
90092-421
U5, U6, U48
IC, ICM7212
90886-072
C19
Capacitor, 1000 pF
90701-166
R13
Resistor, 7.32K, 0.1%, 1/8W
90092-422
U24
IC, VFC32
90886-037
C22, C29, C41, C56
Capacitor, 10 µf-100V
90701-071
R14
Resistor, 47K, 5%, 1/4W
90092-089
U27
IC, CAT93C57P
90886-021
C26, C32, C35
Capacitor, 100 pF
90701-111
R15
Resistor, 33K, 5%, 1/4W
90092-085
U30
IC, 74HC373
90886-086
C37, C40
Capacitor, 22 pF
90701-168
R16, R17, R22, R23, R24
Resistor, 100K, 5%, 1/4W
90092-097
U31
EPROM PROGRAMMED
*
D1
Diode, LM-385Z-1.2
90717-058
R18
Resistor, 4.7K, 5%, 1/4W
90092-065
U32
IC, 74HC244
90886-085
D2
Diode, 1N914
90717-002
R19, R20, R21
Resistor, 2.7K, 5%, 1/4W
90092-059
U34
IC, MAX691
90886-052
D3, D4, D6-D27
Diode, 1N5282
90717-006
RN1-RN3, RN5
Resistor Net., 27 ohm bussed
91248-001
U37
IC, 80C32
90886-071
D5
TransZorb, Transient Suppressor
91269-001
RN4
Resistor Net., 47K isolated
91248-018
U38, U39
IC, LM308AN
90886-016
DS1-DS3
LED, Lamp Green
90761-017
RN6, RN7
Resistor Net., 10K isolated
91248-017
U40
IC, 74HC02
90886-036
JP1
Jumper
90879-007
RN8-RN11
Resistor Net., 4.7K isolated
91248-016
U45
IC, 74C922
90886-058
Q1-Q6
Transistor, 2N3904
90868-015
RN12-RN13
Resistor Net., 10K bussed
91248-002
U49, U50
IC, 74HC4351
90886-087
R2
Resistor, 27K, 5%, 1/4W
90092-083
SW3
Switch, Push Button
91247-027
U51
IC, DP8310
90886-090
R3
Resistor, 249K, 1%, 1/8W
90092-346
X1
Crystal, 12MHz
91226-001
Table 9-Control/display board parts list
* Not a service part. Call Gaymar's Technical Service Department.
85
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P/N 11028-000 10/00
Medi-Therm® III SERVICE MANUAL
Figure 23-Power supply board
Designator
Description
GAYMAR P/N
C1, C2
Capacitor, 1000µF-35V, low ESR
90701-080
F1, F2
Fuse
90695-041
R11, R12
Resistor, 4.7K, 5%, 1/2W
90092-225
C3, C12, C16
Capacitor, 0.1µF
90701-169
JP1-JP3
Jumper
90878-002
R13, R14, R19, R24, R27, R28
Resistor, 200 ohm, 5%, 1/4W
90092-032
C4
Capacitor, 390µF-40V, low ESR
90701-079
L1
Inductor, 55µH
91265-001
C5, C7, C8, C10, C15
Capacitor, 0.01µF-400V
90701-096
Q1, Q2, Q3, Q4
Triac, 2N6347A, 2N6348A, 2N6349A
90709-000
R17, R21, R30
Resistor, 1K, 5%, 1/4W
90092-049
C6
Capacitor, 0.001µF-600V
90701-097
Q5
Voltage Regulator, LT1074
90712-043
R18, R23
Resistor, 5.6K, 5%, 1/2W
90092-227
C9, C11, C20
Capacitor, 330µF-35V
90701-064
Q6
Voltage Regulator, LM340T-12
90712-015
R20, R26
Resistor, 5.1M, 5%, 1/4W
90092-138
C13, C14
Capacitor, 1000µF-35V
90701-081
Q7
Voltage Regulator, LM320LZ-12
90712-001
R22, R29
Resistor, 1.3K, 5%, 1/4W
90092-052
C17, C18, C19
Capacitor, 10µF-100V
90701-071
Q8, Q9
Triac, Z0103MA
77894-000
R25
Resistor, 3K, 5%, 1/4W
90092-060
C21
Capacitor, 0.47µF-400V
90701-180
Q10, Q11
Transistor, 2N3904
90868-015
R31
Resistor, 680 ohm, 5%, 1/2W
90092-205
D1
Diode, MBR745
90717-098
Q12
Transistor, 2N6727
90868-030
RC1
RC Network, 47ohm, 0.5 µF
91069-001
D2, D3
Diode, Bridge, W04G
90717-042
R1, R3
Resistor, 2.00K, 1%, 1/8W
90092-364
U1, U7, U8
Integrated Circuit, MOC3010
90886-001
* D4, D5
Diode
90717-028
R2
Resistor, 2.80K, 1%, 1/8W
90092-348
U2
Integrated Circuit, MOC3021
90886-000
D6, D7, D8, D11
Diode, MR501
90717-084
R4, R5, R6, R7
Resistor, 8.2K, 5%, 5W
90092-440
U3, U4, U5, U6
Integrated Circuit, MOC3063
90886-003
D9, D10
Diode, Zener, 1N749A
90717-014
R8, R10, R15, R16
Resistor, 390 ohm, 5%, 1/4W
90092-039
U9, U10
Integrated Circuit, H11A1
90886-002
D12
Diode, 1N4004
90717-001
R9
Resistor, 100 ohm, 5%, 1/4W
90092-025
VR1, VR2
Varistor, V130LA5
91266-000
* Critical part. Purchase only from Gaymar Industries, Inc.
Designator
ESR = equivalent series resistance
Description
GAYMAR P/N
Designator
Description
GAYMAR P/N
Table 10-Power supply board parts list 86
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P/N 11028-000 10/00
Medi-Therm® III SERVICE MANUAL
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P/N 11028-000 10/00
Medi-Therm® III SERVICE MANUAL
Figure 24-System block diagram 87
CAUTION
Failure to install the compressor shipping braces (see Figure B) before shipment can result in extensive damage to the refrigeration section.
Before physically repacking the Medi-Therm III machine, perform Steps 1 & 2:
Step 5. Refer to figure A. Replace lower wraparound and ten (10) screws.
Step 1. Fill unit with distilled water to proper fill line. Close the DBK hose assembly clamps (refer to manual) and attach hose connectors to the supply quick disconnect fittings on the unit. Direct the DBK hose assembly Clik-Tite connectors to a drain or container having a minimum capacity of three (3) gallons, open the DBK hose assembly clamps. Plug unit into proper voltage receptacle, turn unit on, select MANUAL MODE and set temperature to 30ºC. Drain approximately one (1) gallon of water from unit. Turn unit off, close the DBK hose assembly clamps, fasten the Clik-Tite connectors together and reopen the clamps. Add eight (8) ounces of isopropyl alcohol to unit. Turn unit on, select MANUAL MODE, set temperature to 30ºC and run unit for approximately three (3) minutes. Turn power off.
Step 6. Refer to figure E. Place bottom cap (item 7) on floor.
Step 2. Direct the DBK hose assembly Clik-Tite connectors to a drain or container. Unfasten the connectors. Turn unit on, select MANUAL MODE, set temperature to 4ºC, drain unit until no water comes out. Continue draining by tilting the unit forward and keep it in that position until the unit is completely empty. Turn unit off and unplug the power cord. Connect Clik-Tite connectors together and disconnect the DBK assembly from unit.
NOTE: The hole in the left rear corner support must be positioned directly over the power cord bushing in unit base. No special positioning is required on the other three corner posts.
Step 3. Refer to figure A. Coil power cord and place on strap assembly located on back of rear baffle panel. Hang plug below chassis. Remove lower wraparound by removing ten (10) screws. Step 4. Refer to figure B. Insert three (3) shipping braces. Use a screw and washer through the housing frame and into shipping brace as shown.
NOTE: Steps 7 through 15 will require two (2) people. Step 7. Refer to figure D. Tape up carton support (item 5) as shown using nylon tape (item 4) and place on top of bottom cap. Step 8. Refer to figure C. Place the unit on top of carton support with the wheels oriented as shown. Step 9. Refer to figure D. The Return Carton Kit provides six (6) corner supports (item 3). For units with a rear baffle panel, only four (4) corner supports are used. Position the four (4) corner supports (item 3) on the corners of the unit as shown in the exploded view.
Step 10. Position power cord plug so it lays in the space between the chassis bottom and the bottom of carton. Step 11. Refer to figure E. Push handle protector (item 2) down behind the two (2) front corner supports so it rests on top of the handle. Slide master carton (item 1) over corner supports. Step 12. Refer to figure F. Tape the top of the box closed using nylon filament tape (item 4) supplied with kit. Step 13. Refer to figures F & G for folding bottom cap and securing plastic strap and clip (item 6).
CONTENTS OF RETURN KIT (P/N 78261-000) ITEM
DESCRIPTION
QTY
1
CARTON
1
2
HANDLE PROTECTOR
1
3
CARDBOARD CORNER SUPPORT
6
4
NY LON FILAMENT TAPE (3/4" WIDE)
1
5
CARDBOARD CARTON SUPPORT
1
6
PLASTIC STRAP w/ ATTACHMENT CLIP
1
7
CARDBOARD BOTTOM CAP
1
8
WOOD SHIPPING BRACE
2
9
WOOD SHIPPING BRACE
1
10
SCREW
3
11
WASHER
3
12
RETURN KIT INSTRUCTIONS
1
Figure 25-Shipping/Repackaging Instructions 88
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INSTRUCTIONS
P/N 11028-000 10/00
Medi-Therm® III SERVICE MANUAL
SERVICE INFORMATION