Difference between revisions of "Nav station switches"
From MITNA
m (clarify NAVIG LIGHTS switch) |
(misc new info "navig inst" sw, 12-V main sources) |
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!width="150pt" |CAPTION || OBSERVED FUNCTION | !width="150pt" |CAPTION || OBSERVED FUNCTION | ||
|- | |- | ||
| − | |1 || sw? || SUMP PUMP || | + | |1 || sw? || SUMP PUMP || source bussed to 12-V, but switched conn isn't wired |
|- | |- | ||
|2 || sw? || FORE DECK ILLUM || blows CB (Sep07) | |2 || sw? || FORE DECK ILLUM || blows CB (Sep07) | ||
|- | |- | ||
| − | |3 || sw? || NAVIG INSTR || no observed change | + | |3 || sw? || NAVIG INSTR || no observed change<br>* activates 12-V DC to Datamarine instrument sub-panel<br>* also powers 2-AMP inline fuse with cut out-going wires |
|- | |- | ||
|4 || sw? || MASTHEAD LIGHT || shows approx 2-amp, don't know what light goes on | |4 || sw? || MASTHEAD LIGHT || shows approx 2-amp, don't know what light goes on | ||
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'''Right-hand sub-panel (NAV instruments):''' | '''Right-hand sub-panel (NAV instruments):''' | ||
| − | |||
This unit controls meter illumination intensity in Nav instruments; | This unit controls meter illumination intensity in Nav instruments; | ||
| − | it | + | it probably also control powering them on and off; |
| − | (ThomS has notes on wiring, | + | it also has a distance log, probably driven by a signal from e.g. knotmeter. |
| + | (ThomS has notes on wiring, only in markup form on a copy of panel wiring dgm.) | ||
Revision as of 20:13, 8 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. - See Systems Description for more mechanical, electrical, and operating info of this pump.
- 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 that Ted fixed (Aug-Sep07) i.e. sidelights at top of topsides and sternlight |
| 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 | source bussed to 12-V, but switched conn isn't wired |
| 2 | sw? | FORE DECK ILLUM | blows CB (Sep07) |
| 3 | sw? | NAVIG INSTR | no observed change * activates 12-V DC to Datamarine instrument sub-panel * also powers 2-AMP inline fuse with cut out-going wires |
| 4 | sw? | MASTHEAD LIGHT | shows approx 2-amp, don't know what light goes on |
| 5 | sw? | RADIO | activates fixed VHF transciever 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):
This unit controls meter illumination intensity in Nav instruments; it probably also control powering them on and off; it also has a distance log, probably driven by a signal from e.g. knotmeter. (ThomS has notes on wiring, only in markup form on a copy of panel wiring dgm.)
