User Manual

CA1N1223en / 08.06.2011 Siemens Building Technologies
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9I802A
The housing and cover of the immersion thermostat are made of plastic. The removable
cover is fixed by 2 screws. The standard pockets are made of nickel-plated bronze and
may, if required, be replaced by stainless steel pockets (see 'Accessories').
Pockets made of stainless steel (V4A), may be used as an alternative to the standard
brass pockets. The Z619 pockets are threaded with G½ to ISO 228/1 and are suitable
for nominal system pressures up to PN4.
Mounting instructions are enclosed with the accessories (Ref. 35195).
Z619 pocket for TTM2D and TTW2D length 150 mm
Mounting instructions (Ref. 35199) are enclosed with the thermostats.
The immersion thermostats may be removed from the pocket by loosening a clamping
screw. They may only be used with the pocket supplied. With high pressure require-
ments (> PN16) the standard pocket must be replaced by a Z619 pocket (see
'Accessories' ). If it is used as a pipe thermostat, the immersion thermostat should,
wherever possible, be mounted in a pipe elbow, and must be aligned against the flow.
Operating diagram
Mechanical design
Accessories
Mounting notes