Despatch 926E Equipment Manual (C-155)Rev 2/11 - Manual (Page 41)

36
Coolant Solenoid Orifice Assembly
The coolant solenoid orifice assembly should be cleaned only when necessary.
Frequent cleaning should not be required if contaminant-free CO
2
is always used.
Clean the coolant orifice as follows.
1.
Disconnect AC power.
2.
Disconnect coolant hose.
3.
Remove vent screen from control unit compartment.
4.
Open heater compartment.
5.
Remove coolant solenoid assembly from control unit compartment.
6.
Remove orifice tube from solenoid assembly.
7.
Check position of orifice for reinstallation.
8.
Carefully clean orifice using 0.46 mm (0.18 inch) diameter music wire.
9.
Replace orifice tube in solenoid assembly, performing the removal procedure in
reverse order.
10.
Reinstall coolant solenoid assembly in control unit compartment.
11.
Close control unit and heater compartment.
12.
Connect coolant hose.
13.
Turn on coolant cylinder valve and check for leaks.
14.
Connect AC power.
15.
Operate test chamber at low temperature set-point to insure correct cooling
function.