Miele G 7881 Service Manual

							4 Service
4.1 Heater Element Connection Conversion From 3 N AC 400 V To
230VAC
x
Note
German standard models only.
Warning!
With this connection variation, the connection lead must be at least 3 x 0.01 in.
2
(3 x 4 mm2). The fuse rating should be 30A.
Fig. 4:Holding Bracket
AService Panel Removal, 022 4.2.
AToekick Removal, 010 4.6.
ARemove the holding bracket (080 Fig. 4, Pos. 2) after removing the retaining
screws (080 Fig. 4, Pos. 1).
Descriptive Technical Documentation
080-10 DTD no. 62-7881
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							x
Fig. 5:Star Point Plug of 3 Heater Elements
APull off the right plug (neutral conductor) 080 Fig. 5, Pos. 2 from the star point
080 Fig. 5, Pos. 1 and connect it onto the vacant left plug contact.
ARe-install the holding bracket.
AAt the main terminal block, disconnect the lead L2 plug and fit it onto the
neutral conductor connection N. A vacant plug contact is directly behind the 2
plugs already installed there.
AAt the main terminal block, disconnect the lead L3 plug and fit it onto the plug
contact L1. A vacant plug contact is directly behind the 2 plugs already
installed there.
AAfter the conversion, check the power consumption. The power consumption
of the heater element circuit connected in accordance with 080 Fig. 3 must
not greatly exceed 6 kilowatts.
4.2 Heater Relay Removal
AService Panel Removal, 022 4.2.
AToekick Removal, 010 4.6.
ARemove the 3 screws securing the retaining bracket (080 Fig. 4, Pos. 1 and
2).
ARemove the screws securing the appropriate relay (see 080 Fig. 6, Pos. 1).
Slide the relay out of the mounting bracket to remove.
Descriptive Technical Documentation
DTD no. 62-7881 080-11
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Fig. 6:Relay Screws
Warning!
Take care to connect relays correctly when re-installing!
Descriptive Technical Documentation
080-12 DTD no. 62-7881
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							091 DOS G 60 Dispenser Module
Descriptive Technical Documentation
DTD no. 62-7881 091-1
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							1 Technical Data
Fig. 1:Drilling Dimensions (Millimeters) - DOS G 60 Dispenser Module
DOS G 60 Dispenser Module
Dimensions (L x W x H) 9.2”x 4.2”x 4.6“(234 x 107 x 118 mm)
Weight 5.1 lbs (2.3 kg)
Test certificate Splash proof IP X1
Table 1:Dimensions and Test Certificate
Electrical Connection - USA Models Only
Voltage 208/220 VAC 60Hz (dispenser pump)
Current consumption Approx. 220mA (with activated dispenser pump)
Power rating Approx. 50W (with activated dispenser pump)
Connection cable 5 x 0.01”
2with 5-pin flat plug, 10' long
Table 2:Electrical Connection - USA Models Only
Dispenser Connection/Pump Capacity
Hose LengthInternal
DiamterExternal Diameter
Suction sideTranspar-
ent PVCApprox. 6'
(1850 mm)0.2”(6
mm)0.3”(8 mm)
Pressure sideTranspar-
ent PVCApprox. 7'9”
(2350 mm)0.2”(6
mm)0.3”(8 mm)
Suction probeBlue marking, approx. 13”(330 mm) long, for 5 L + 10 L containers. Double
connection for level indicator and agent intake. Screw connection for
container.
Dispensed
quantity (DOS 60
/ 30)Approx. 2 fl.oz. (60 mL) in 30 s
Suction height Approx. 6'7”(2000 mm)
Table 3:Dispenser Connection/Pump Capacity
Descriptive Technical Documentation
091-2 DTD no. 62-7881
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							2 Function
2.1 Color Coding for Different Agents
Standardized color coding for containers and hoses allows broad classification of
agents whose exact components are unknown.
x
Color Coding
Blue Alkaline agents (e.g., detergent)
International coding
Red Acidic agents
Green Chemical disinfectant
Miele internal coding
White Neutral agents for various applications
Table 4:Color Coding for Different Agents
2.2 Construction and Control of the DOS G 60 Dispenser Module
x
Fig. 2:DOS G 60 Dispenser Module Components
X3/4 Terminal block
M9/7 Dispenser pump motor
B1/7 Level switch (reed switch)
X2/2 5-pin flat plug for connection to washer-disinfector
Programming of the dispenser pump (dispensing time) is carried out via the
control of the machine to which the DOS dispenser module is connected as an
external dispenser assembly (DOS 4). Manual setting of the dispensing time is
not necessary. The indicator LED on the fascia panel is activated via reed switch
B1/7 in the suction probe connected to the additional EZL electronic module, 080
Fig. 1, plug 6. Dispenser pump M9/7 in the DOS dispenser module is activated via
080 Fig. 1, plug 14.
Descriptive Technical Documentation
DTD no. 62-7881 091-3
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							The dispenser pump hoses are subject to severe wear and tear (aggressive
agents) and should therefore be replaced at least once per year; see Replacing
the Dispenser Pump Hose Complete With Pump Cap, 091 4.2. To suit the various
agents in use several different hoses are available. A conversion kit contains a
dispenser pump cap with a pre-installed hose.
2.3 Plug Assignments for the Different DOS Modules
x
Fig. 3:Plug Connections for C-Series DOS Modules
Descriptive Technical Documentation
091-4 DTD no. 62-7881
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							Fig. 4:Plug Connections for G-Series DOS Modules
1 Black
2 Black
3 Brown
N Blue
Descriptive Technical Documentation
DTD no. 62-7881 091-5
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							x
Fig. 5:Plug Connections for K-Series DOS Modules
A Fill-level sensor,openfor full dispensing containers!
B Float switch (flow monitoring),closedfor liquid media!
A spring-loaded float switch for flow monitoring was integrated into K-series DOS
modules, in addition to G-series DOS modules. After flow, this spring pushes the
piston of the float switch back into its initial position. It is switched in parallel to the
fill-level sensor within the module housing and is therefore pin-compatible to the
existing dispensing sockets on the washers and disinfectors.
In K 60 DOS modules, a float switch with a spring tensile strength of 0.1 pounds/
0.4 newtons (for capacities between 40 and 200 milliliters) was incorporated. The
housing of this float switch is blue.
Descriptive Technical Documentation
091-6 DTD no. 62-7881
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							3 Fault Repair
3.1 Swelling of Hose Material
Cause
To ensure that elastomers are treated as gently as possible, disinfecting, alkaline
detergents with a high active chlorine content should not be used at temperatures
above 176°F/80°C. In particular, liquid agents with tensides and disinfectants can
lead to large variations in the volume capacity of dispenser pumps (usually due to
swelling of the hose material).
Remedy
AReplace the hoses.
x
Note
When a high cleaning standard depends on the dispensing of liquid disinfectant,
the dispenser hose should be replaced approximately every year. If particularly
exacting cleaning, final rinsing or disinfecting results are desired, then regular
checks and quality controls should be carried out to ensure that the required
standards are being maintained.
3.2 DOS G 60 Dispenser Module Does Not Supply Agent
Cause
Dispenser pump inoperative.
Remedy
ACheck voltage supply; see No Voltage at DOS G 60 Dispenser Module, 091
3.3.
Cause
Air in dispenser hose.
Remedy
AVentilate the dispenser hose; see 070 2.8.2E 02, Dispenser Settings.
Descriptive Technical Documentation
DTD no. 62-7881 091-7
18.09.2013, US_am This information should not be duplicated or passed on without Miele approval. All rights reserved.