Taylor-Wharton KRYOS Controller - Manual (Page 37)

35
KRYOS
REPLACEMENT KRYOS CONTROLLER FIELD
INSTALLATION
For all LABS and 38K Cryostorage Units
1. Unplug Power from unit.
2. Close liquid nitrogen supply at valve.
3. Remove (4) Phillips head screws from rear of interface display box.
4. Remove controller face from interface display box.
5. Finish face removal by disconnecting plug and ground wire.
6. Remove (2) Phillips head screws from the old control located underneath the
tabletop.
7. Withdraw old controller from underneath table top, noting how the controller
body has been resting on outer upper head.
8. Unplug all connectors and wires and set panel aside.
9. Disconnect supply hose from solenoid valve.
10. Remove old solenoid.
11. Remove spiral wire wrap.
12. Mark old sensor locations with electrical tape.
13. Measure and make note of the “Start Fill”, “Stop Fill” and temperature sensors
from the bottom of the appropriate sensor tube. You will need this information to
set up the new controller.
14. Remove old sensor wires.
15. Calibrate new KRYOS control to new temperature sensor.
16. Reverse procedure to install KRYOS control.
For 10K and 24K Cryostorage Units
1. Unplug power from old unit
2. Close liquid nitrogen supply at valve
3. Remove 4 phillips head screws from controller face escutcheon
4. Remove 4 phillips head screws from cabinet top and 2 from old control
5. Withdraw old controller from cabinet top, noting how the controller body has
been resting in guide slots
6. Unplug all jacks and wires from old controller and set aside
7. Remove 4 phillips head screws from real electrical panel
8. Unplug all connectors and wires and set panel aside
9. Remove rear plumbing access panel
10. Disconnect supply hose from solenoid valve using a 7/8 inch wrench
11. Remove old solenoid
- two ¼ inch hex head screws
- one compression fitting using 3/8 inch wrenches
12. Lower lid and lock hinged lid to cabinet top
13. Raise hinged lid. Cabinet top should also raise out of the way
14. Remove all wire and electrical components other than sensors and thermocouple
15. Remove old sensor tube with sensors left in place
16. Mark old sensor locations with electrical tape
17. Measure and made note of the “Start Fill”, “Stop Fill” and temperature sensors
from the bottom of the sensor tube. You will need this information to set up the
new controller.
18. Reverse procedure to install KRYOS control
WARNING:
Electrical shock can
kill. Do not attempt
any service on these
units without first
disconnecting the
electrical power cord.