Difference between revisions of "Nav station switches"
From MITNA
(MAIN switch panel: correct vert-sw descripts; non-protection) |
m (MAIN panel: clarify "MAIN" switch function) |
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*Notes (above): | *Notes (above): | ||
** Do not let bilge pump run "dry"; when in DOWN position, turn switch to CENTER or UP <br>when higher-pitch sound from pump indicates all water is pumped out. | ** Do not let bilge pump run "dry"; when in DOWN position, turn switch to CENTER or UP <br>when higher-pitch sound from pump indicates all water is pumped out. | ||
| − | ** Pump is NOT fused in Nav Station switch panel | + | ** Pump is NOT fused in Nav Station switch panel, but its fuse is inline, bundled in <br> wiring above Battery 1, in battery compartment behind nav table seat. <br> Fuse is type AGC, current 15-amp. |
<br> | <br> | ||
{| border="1" cellspacing="1" style="margin: 10px" | {| border="1" cellspacing="1" style="margin: 10px" | ||
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!width="150pt" |CAPTION || OBSERVED FUNCTION | !width="150pt" |CAPTION || OBSERVED FUNCTION | ||
|- | |- | ||
| − | |1 || 30-A || MAIN || powers (12-V) upper 2-6, lower 1-6 switches | + | |1 || 30-A || MAIN || powers (12-V) and protects upper #2-6, and <br> lower #1-6 switches, but not 7 vertical switches |
|- | |- | ||
|2 || 10-A || NAVIG LIGHTS || believe lights these that Ted fixed (Aug-Sep07) | |2 || 10-A || NAVIG LIGHTS || believe lights these that Ted fixed (Aug-Sep07) | ||
| Line 76: | Line 76: | ||
|7 || 15-A || RADAR || activates RADAR power (approx 3-amp warm-up) <br>(wire cut Apr08; RADAR removed to bench-test) | |7 || 15-A || RADAR || activates RADAR power (approx 3-amp warm-up) <br>(wire cut Apr08; RADAR removed to bench-test) | ||
|- | |- | ||
| − | | | + | |- || -- || NAV/COM || no switch - switch handle hole plugged |
|} | |} | ||
NOTE: "SW" in the table above indicates that we observed (Apr08) '''no''' marking on these switch units <br> to indicate that they have any circuit-breaking function. | NOTE: "SW" in the table above indicates that we observed (Apr08) '''no''' marking on these switch units <br> to indicate that they have any circuit-breaking function. | ||
Revision as of 16:11, 1 May 2008
- (return to Systems Description "12-v DC")
| POSITION | ACTION |
| UP | automatic: starts when a certain level is reached, stops when lower level reached |
| CENTER | off: pump never runs |
| DOWN | manual: pump runs whether or not there's water to pump |
- Notes (above):
- Do not let bilge pump run "dry"; when in DOWN position, turn switch to CENTER or UP
when higher-pitch sound from pump indicates all water is pumped out. - Pump is NOT fused in Nav Station switch panel, but its fuse is inline, bundled in
wiring above Battery 1, in battery compartment behind nav table seat.
Fuse is type AGC, current 15-amp.
- Do not let bilge pump run "dry"; when in DOWN position, turn switch to CENTER or UP
| SWITCH | AMPS | CAPTION | OBSERVED FUNCTION |
|---|---|---|---|
| 1 | 30-A | MAIN | powers (12-V) and protects upper #2-6, and lower #1-6 switches, but not 7 vertical switches |
| 2 | 10-A | NAVIG LIGHTS | believe lights these that Ted fixed (Aug-Sep07) |
| 3 | 10-A | STEAMING LIGHT | blows #3 CB after drawing > 50-A |
| 4 | 10-A | CABIN LIGHTS | not observed (Sep07) |
| 5 | 10-A | PRESSURE WATER | shows c. 5-A when pump runs |
| 6 | 10-A | BLOWER | (blower probably disconnected (Sep07)) |
| SWITCH | AMPS | CAPTION | OBSERVED FUNCTION |
|---|---|---|---|
| 1 | sw? | SUMP PUMP | unknown |
| 2 | sw? | FORE DECK ILLUM | blows CB (Sep07) |
| 3 | sw? | NAVIG INSTR | no observed change |
| 4 | sw? | MASTHEAD LIGHT | shows approx 2-amp, don't know what light goes on |
| 5 | sw? | RADIO | activates fixed VHF power |
| 6 | sw? | ACCESSORY | probably works, but passageway socket disconnected?) |
Note: in AMPS column above of the six switches above, "sw?" means that (Apr08) we saw no amperage rating,
which probably implies that they are switch-only devices, without a circuit breaker.
In this case, they count on
the "'MAIN'" (leftmost upper switch #1) for over-current protection.
| SWITCH | AMPS | CAPTION | OBSERVED FUNCTION |
|---|---|---|---|
| 1 | SW | no caption | not wired up |
| 2 | 25-A | Auto Pilot | unknown |
| 3 | SW | REFRIGERATION | unknown |
| 4 | SW | STROBE | unknown |
| 5 | SW | ANCHOR | unknown |
| 6 | 05-A | PHONE | unknown (note: there's a "phone" shore connection on port quarter) |
| 7 | 15-A | RADAR | activates RADAR power (approx 3-amp warm-up) (wire cut Apr08; RADAR removed to bench-test) |
NOTE: "SW" in the table above indicates that we observed (Apr08) no marking on these switch units
to indicate that they have any circuit-breaking function.
NOTE: The 12-volt feed to these seven vertical switches NOT protected against over-current
by the 'MAIN' circuit breaker on the top horizontal row of switches, nor by any other known breaker or fuse.
However, the ammeter DOES display these switches' current loadings
Right-hand sub-panel (NAV instruments):
(no info available yet (Sep07)) This unit controls meter illumination intensity in Nav instruments; it may also control powering them on and off. (ThomS has notes on wiring, but can't locate it Apr08.)
