Bird Technologies 8890-320 Series - Manual (Page 18)

6
Installing the Thermoswitch
Bird 8890 series series Loads can be equipped with an optional interlock thermoswitch, P/N 8890-008. It is normally
closed, opening at 236 °C (457 °F), with a rating of 10A at 120VAC and 5A at 230VAC.
Note: A control thermoswitch, P/N 2450-085, is used to control the optional blower assembly. It is normally
open, closing at 155 °C
(311 °F), with a rating of 10A @ 120VAC and 5A @ 230VAC.
1. Remove the vent plug.
2. Install the shipping plug.
3. Stand the unit on its back with the connector end up.
Note: In this position there is no danger of the coolant pouring out through
the socket plug hole.
4. Do one of the following:
•
For Interlock Thermoswitch:
Remove the socket plug just above the connector assembly with a
9 ⁄
16
" hex
wrench. See “Installing the Interlock Connection” on page 6.
•
For Control Thermoswitch:
Remove the top socket plug with a
9 ⁄
16
" hex wrench.
5. Replace the plug with the thermoswitch.
6. Apply pipe sealing compound sparingly to ONLY the external threads of the thermo-
switch.
7. Check for coolant leaks upon completion.
Installing the Interlock Connection
1. Unscrew the large knurled ring-nut (A) at the lower end of the coupling jack assembly.
2. Pull the large knurled nut off the thermoswitch jack (B).
3. Unscrew the small knurled cover fitting from the base plug (D) of the connector to
release the base.
4. Thread the control switch wires through the clamp (E) with the washers (F) inside and
with its threaded fitting in place.
5. Service the control switch wire with short tips and put spaghetti sleeves over the wire
ends if necessary.
WARNING
The vent plug must be used at all times when the unit is operating or cooling. Failure to do so could result in an
explosion or severe burns.
CAUTION
Do not contaminate the coolant with pipe sealant.
CAUTION
If installed, connect optional interlock before applying RF power.