Grundfos PHP A-1 4.0, Instruction Manual

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2.6 Temperature sensor T2 (Optional)
PHP modular series devices with an attached temperature
sensor T2 (optional accessory) provide a monitoring of the
temperature of the system return respective the expansion
overflow pipe.
Due to this monitoring the degassing feature will be disabled
in case of a too high temperature. Thus the membrane and
the components can‘t be damaged by too hot plant media
during the degassing. We recommend to use the temperature
sensor T2 in systems with a max. operational temperature of
95 °C (set at the system safety temperature limiter).
The installation of the temperature sensor T2 into the system
return must be executed on-site, the sensor must be mounted
immediately in front of the connection to the pressure
maintenance device
(Figure 8a) . If a cooling vessel is used, the
sensor must be mounted into the expansion overflow pipe on
top of the cooling vessel
(Figure 8b) .
Figure 8: Installation of the temperature sensor T2 without
(a) and with (b) cooling vessel
PHP A-1 Instruction Manual / Mounting
08
2.7 Electric connection
The supply line has to have a protective earth wire. The electric
connection should be done through an isolator that can either
be unplugged or, in case of a 3 phase supply, can be switched
off (4 pole) and lockable with a readily accessible spur.
WARNING
All relevant electric standards must be adhered to.
INFORMATION
The connected load can be read at the type plate of the
PHP device.