Commissioning The Heat Pump - Bosch EHP 6-11 LW User And Installation Manual

Commissioning the heat pump

Commissioning the heat pump
The heat distribution and heat transfer fl uid circuits should be fi lled and
fully vented before commissioning. Also check that there are no leaks.
As many radiators as possible should be fully open when connecting to an
existing water system. When connecting to a fl oor heating system at least
half of all the fl oor coils should be open. When connecting a fan-assisted
radiator system the fans are started fi rst and then the taps on the fan-
assisted radiators are opened fully.
Start the heat pump
1. Connect mains to the heat pump and press the ON/OFF switch on the
control panel.
3-phase heat pumps: The control unit automatically measures the phase
sequence so the compressor does not operate in the wrong direction. If the
phase sequence is wrong the alarm 3-phase incorrect will trip. Read more
about the alarm under the heading What to do if a fault occurs.. Disconnect
the mains power to the heat pump and switch the phases manually.
2. Activate the Installer/Service menu by pressing the Menu button until the
text Access = SERVICE is shown on the menu display.
3. Temporarily adjust temp. incr. / decr. +/- to maximum value. To avoid
having to wait for the heat pump restart timer you can go to the menu Fast
restart of heat pump (menu 5.6) and quickly restart the heat pump. If the
heat pump does not start, press the Info button to see if a heating demand
exists.
4. Check the sight glass inside the heat pump during start up. Bubbles may
appear in the sight glass for a few minutes during start up. The bubbles
should then stop. Bubbles present when the heat pump is running are a
fault symptom. They are probably due to insuffi cient refrigerant. Read more
about the fault symptom under the heading What to do if a fault occurs.
5. Make the necessary settings on the control panel.
a. Confi rm connected external sensors. If T3 (GT3), T4 (GT4) or T5 (GT5)
have been connected, you must confi rm these so the control unit knows
they are installed. The displays presented by the sensors are only shown if
the sensors have been confi rmed.
b. Set the maximal output to be used by the electric cassette. Choose
between 1/3, 2/3 and 3/3. It is important that the electrical installation is
adapted to handle the maximum electrical output. On delivery the control
unit is set to 2/3. For more information about this see section Technical
information.
Further important information on
control unit can be found in the user
section.
Therefore read the entire manual
before commissioning is started.
Press the power switch ON/OFF
66
Note
Reg 637 I/S
040622 16:08:15 Tu
temp. Info Menu
Commiss./Service
Fast restart
of heat pump 5.6
Return Select
Check the sight glass
Commiss./Service
Connected extra
sensor in op 5.13
Return Select
Commiss./Service
Select conn capacity
electrical cass. 5.2
Return Select