5
Replacement parts and accessories
Maintenance/Temperature setting field change out
To remove the thermostatic sensor for maintenance or field change
out of thermostatic sensor cartridge, proceed as follows, paying
attention to the position of each component:
1) Remove the insulation and the temperature gauges, shut off
the three separately-purchased ball valves and remove the
unit body from the pipes.
2) Using a 17 mm hex key, unscrew and extract the shutter
locking nut, entering through the upper by-pass from boiler
port on the unit (fig. 1).
3) Extract the spring: attached to it are the shutter and the
thermostatic sensor (fig. 2).
4) Conduct appropriate maintenance or replace the
thermostatic sensor with a new cartridge, separately
purchased. The sensor can be fully inserted into the seat
with a slight interference fit.
5) Reassemble the shutter unit following the procedure in
reverse order.
Replacement thermostatic sensor cartridges. Easy replacement to change
the ThermoBloc™ boiler protection recirculation and distribution unit set
temperature:
F29633
115°F (45°C)
F29634
130°F (55°C)- standard factory-supplied setting
F29635
140°F (60°C)
F29636
160°F (70°C)
Dual scale temperature gauge for ThermoBloc™ boiler protection recirculation
and distribution unit:
F29571
32 - 250°F (0 - 120°C)
Replacement pump. Easy replacement by removing 2 bolts and inserting
the head in the 281 assembly.
F19379
115 VAC / .8 A. 16 feet head
R50057
Replacement 1-1/2” union washer.
