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9.3 Approvals (cFMus)
The SMD mixers have been approved by FM, and the explosion-
proof versions hold FM-type examination certificates, numbers
FM17US0078X and FM17CA0043X.
9.3.1 Approval standards
The SMD mixers have been approved by FM according to:
Canadian standards
CSA-C22.2: No. 1, No. 0.4, No. 100, and No. 145, CAN/CSA-
C22.2: No. 60079-0, No. 60079-1, and No. 60529.
United States standards
FM 3600, FM 3615, FM 3650, ANSI/ISA 60079-0, ANSI/UL
60079-1, and ANSI/IEC 60529.
Explanation of FM approval classification
The SMD mixers have the following explosion-protection
classification: Class I, Division 1, Groups C and D, T4, IP68.
Code
Description
Explosive atmosphere caused by gas or
Class I
vapors
Division 1
Area classification
Groups C and D Classification of gases
Maximum surface temperature is 275 °F (135
T4
°C)
IP68
Enclosure class according to IEC 60529
24
10. Servicing the product
Before starting work on the mixer or flowmaker,
– make sure that the fuses have been removed or
the main switch has been switched off
– make sure that the power supply cannot
accidentally be switched on
– make sure all rotating parts have stopped
moving.
All regulations applying to mixers installed in
potentially explosive environments must be
FM
observed.
Make sure that no work is carried out in potentially
explosive environments.
Before starting any work on mixers or flowmakers used in liquids
which could constitute a hazard to health, carry out thorough
cleaning and venting of mixer or flowmaker, tank, etc. according
to local regulations.
10.1 Explosion-proof mixers
Explosion-proof mixers must be serviced and repaired by
Grundfos or by a service partner appointed by Grundfos.
Service work must be carried out according to ANSI/IEC 60079-
19.
Spare parts
Damaged mixer parts must always be replaced by new, approved
parts. Motor parts must not be reconditioned by machining,
retapping, welding, etc.
10.2 Contaminated mixer or flowmaker
CAUTION
Biological hazard
Minor or moderate personal injury
- Flush the mixer or flowmaker thoroughly with clean
water and rinse the mixer or flowmaker parts in
water after dismantling.
The product will be classified as contaminated if it has been used
for a liquid which is injurious to health or toxic.
If you request Grundfos to service the product, contact Grundfos
with details about the liquid before returning the product for
service. Otherwise, Grundfos can refuse to accept the product for
service.
Any application for service must include details about the liquid.
Clean the product in the best possible way before you return it.
Costs of returning the product are to be paid by the customer.
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