Heater – Replacing Older Uc/06 Nla Heaters - Bosch SHI4302 Manual

VIII. Troubleshooting
VIII. Troubleshooting
Heater
Heater
Some heater assemblies for old index UC/06 models aren't
available -- # 264463 (for SHU 3000/4000 models) & #
269255 (for SHU 3030/3130 models).
assemblies for other index UC/06 models can be used when
thermostats are installed, flow switches are replaced and
aqua sensors are removed – use # 263869 (used on SHU
53/68 models) or # 264462 (used on SHU 33/43/99 models).
Push latches to remove NTC,
then replace with appropriate
thermostat (& o-ring) for the
particular model.
HINT:
assemblies before installation as aqua sensors aren't
used and have no wires to be connected to.
NOTE: Individual heating elements aren't available.
Use 263869 or 264462 heater assemblies only.
168575 thermostat for
SHU 3000/4000 models
– Replacing Older UC/06 NLA Heaters
– Replacing Older UC/06 NLA Heaters
Remove aqua sensors
Must replace
terminal flow switch
# 175711 with 3-
terminal # 069796.
# 175711
# 069796
from heater
165384 thermostat for
SHU 3030/3130 models
86
Similar heater
2-
Remove
aqua
sensor
HINT: Do not use softer
bearing heater assemblies
(UC/11 & later) such as #
480317 on older UC/06
models since the sump,
circulation pump, base and
heater clamps/gaskets
have to be replaced as
well for the heaters to fit.