Before Starting; Verification Of Monitoring - ABB DC Machines DMI Operating And Maintenance Instructions Manual

Before starting

Verification
of monitoring
equipment of
heat exchang-
ers

Heat exchangers
• The water supply pipe system must be
flushed out before coil is connected.
• Pressure tests of pipe system, after coil is
connected, must not exceed test pressure
indicated on the rating plate.
• When heat exchanger is taken into use, all air
must be evacuated from water pipe system
and the cooling coil.
Air in the coil can be evacuated through
venting plugs on the coil headers.
This is an instruction in how to verify that the
monitoring devices on the heat exchangers
are working properly. Monitoring devices (1-8)
mentioned in this chapter are optional and not
included in the heat exchanger.
1. Filter monitor
2. Pressure switch
3. Mounting device for thermostat
4. Mounting device for Samson regulator
5. PT 100
6. Flow sensor
Picture 24 Location of monitoring equipment of air-water heat exchanger.
• The water flow must be regulated to obtain
water flow indicated on data plate of the heat
exchanger.
• To avoid erosion damages in coil tubes do
not exceed maximum water flow.
• Check gaskets for air leakages in connection
areas such as between cooler and motor,
cable entrances or incorrectly fitted inspec-
tion covers
Pictures and text in this chapter apply to top-
mounted air/water heat exchangers. For side-
mounted air/water heat exchangers and air/air
heat exchangers, the location of the equipment
might vary a bit. Unless noted, the principle is
however the same.
7. Water leakage detector
8. Terminal box
9. Housing
10. Fan motor
11. Leakage air filter