Thermo King 098203, Maintenance Manual

Page: 195 / 264

Refrigeration Maintenance
193
13. Install element in tube on suction line. Tighten clamp. Reapply insulation around bulb and secure with
a ty band.
14. Install the element access panel and install grommets. Install TXV mount.
15. Install left side motor and fan.
16. Open service valves or recharge unit with R404A (see “Charging the System with Refrigerant” in this
chapter).
17. Perform a controller pretrip test to verify system operation.
Economizer Expansion Valve Replacement
Economizer Expansion Valve Removal
Remove the economizer expansion valve by performing the following steps:
1. Some units have a receive tank outlet valve, if the unit does perform a low side pump down and
isolate the low side by closing the compressor service valves. If the unit does not have an outlet valve
recover the refrigerant charge from the unit (see “Recovering Refrigerant from the System” on
page 181).
2. On the feeler bulb carefully remove the outer insulation, to be reused. Remove cork tape from around
element.
3. Unclamp feeler bulb from the suction line in the condenser section.
4. Clean element bulb tube holder and tube.
5. Heat and unsolder the inlet and outlet lines from economizer expansion valve.
6. Remove the old economizer expansion valve from unit and discard.
Economizer Expansion Valve Installation
Install the economizer expansion valve by performing the following steps:
1. Clean the inlet and outlet lines for soldering.
2. Place new economizer expansion valve in position.