-23-
HIGH PRESSURE SWITCH KITS 55000401 & 55000402
KIT
USED ON
PRESSURE SWITCH
CUT OUT PRESSURE
CUT IN PRESSURE
55000401
MCU(+), MHPUL
HP Manual
2760kPa (400psig, 27.2 bar g)
2280kPa(330psig, 22.5 bar g)
55000402
MHPUE
HP Auto
2760kPa (400psig, 27.2 bar g)
2280kPa (330psig, 22.5 bar g)
ITEM
QTY
DESCRIPTION
1
1
HP cartridge pressure switch
2
1
Copper gasket
3
4
Cable tie
4
1
In-line connector
Manual high pressure switches are reset by pushing the red button.
ISOLATE THE UNIT ELECTRICALLY PRIOR TO INSTALLATION OF THE KIT
1
Remove the front access panel (three screws) and the electrical supply cover.
2
The HP switch should be fitted to the discharge line service port as shown below.
3
Using a little refrigeration oil for lubrication, place the gasket inside the switch and screw onto the appropriate service
port. Secure
using two open ended spanners on the hexagonal connectors
(typical torque 9Nm). Ensure that
the switch depressor connects properly (this will be accompanied by a slight hiss of refrigerant).
4
Ensure that there are no leaks around the connection using a suitable leak detector.
ELECTRICAL CONNECTIONS
Route the pressure switch flying leads through a grommet hole in the base of the electrics box, ensuring that they are clear
of all pipework.
MCU 1Ø & MCU 3Ø
1.
Locate the in-line connector with the violet and red wires and disconnect the red wire.
2.
Connect the red HP switch wire to the red wire using the in-line connector supplied in the kit.
3.
Connect the black HP switch wire to the in-line connector attached to the violet wire.
4.
Cut the terminal from the blue HP switch wire and strip back the insulation by 10mm.
5.
Connect the blue HP switch wire to terminal rail terminal 5.
6.
Secure all wires neatly using cable ties.
Heronhill - for all your IMI requirements
Tel: 01823 665660
www.heronhill.co.uk
Fax: 01823 665807
