S1800 Marine Model Ice Machines – Service Manual - Manitowoc Ice
S1800 Marine Model Ice Machines – Service Manual - Manitowoc Ice
S1800 Marine Model Ice Machines – Service Manual - Manitowoc Ice
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Section 6 Electrical System<br />
2. REFRIGERATION SYSTEM<br />
START-UP<br />
The compressor starts after the 45second<br />
water purge, and it remains<br />
on throughout the Freeze and<br />
Harvest cycles.<br />
The water fill valve is energized at<br />
the same time as the compressor.<br />
The harvest valve(s) remains on for<br />
the first 5 seconds of the initial<br />
compressor start-up and then shuts<br />
off.<br />
At the same time the compressor<br />
starts, the condenser fan motor (aircooled<br />
models) is supplied with<br />
power throughout the entire freeze<br />
and harvest sequences.<br />
The fan motor is wired through a fan<br />
cycle pressure control, and may<br />
cycle on and off. (The compressor<br />
and the condenser fan motor are<br />
wired through the contactor. Any time<br />
the contactor coil is energized, the<br />
compressor and fan motor are<br />
supplied with power.)<br />
L1<br />
(88)<br />
Ground<br />
(89)<br />
High<br />
Pressure<br />
Cutout<br />
(42)<br />
Self-Contained — Refrigeration System Start-Up<br />
Table 6-2. Self-Contained <strong>Model</strong>s<br />
2. Refrigeration System Start Up (5 Seconds)<br />
Toggle Switch ICE<br />
Bin Switch<br />
Control Board Relays<br />
Closed<br />
#1 Water Pump OFF<br />
#2 Harvest Valve (Left) ON<br />
#3 Harvest Valve (Right) ON (When Used)<br />
#4 Air Compressor ON (When Used)<br />
#5 Water Inlet Valve ON<br />
#6 Water Dump Valve OFF<br />
#7 Contactor Coil Closed / ON<br />
#7A Compressor ON<br />
#7B Condenser Fan Motor OFF<br />
Safety Controls (Which could stop ice machine operation)<br />
High Pressure Cut-Out Closed<br />
Main Fuse (On Control Board) Closed<br />
(55)<br />
<strong>Ice</strong> Thickness<br />
Probe<br />
Water Level Probe<br />
Contactor<br />
Contacts<br />
(Black)<br />
L1<br />
Overload<br />
(51) (85)<br />
Control Board<br />
(2)<br />
(6)<br />
(5)<br />
(1)<br />
(7)<br />
(4)<br />
Trans.<br />
Fuse (7a)<br />
Water Valve<br />
(21)<br />
(22)<br />
Harvest Valve<br />
(77)<br />
(80)<br />
SV3137-4<br />
Part Number 80-1634-3 6-3<br />
Low DC<br />
Voltage<br />
Plug<br />
(Red)<br />
Fan Cycle<br />
Control<br />
(9)<br />
L2<br />
(25)<br />
(8)<br />
Compressor<br />
(86)<br />
(Yellow)<br />
(61)<br />
(26)<br />
(1)<br />
(2)<br />
(20)<br />
(60)<br />
(57)<br />
(6)<br />
(46)<br />
(58)<br />
Dump Valve<br />
(76)<br />
(81)<br />
Water Pump<br />
(98)<br />
(59)<br />
Terminates at<br />
Pin Connection<br />
Contactor Coil<br />
(56)<br />
Air Compressor<br />
Bin Switch<br />
PTCR<br />
Fan Motor<br />
Clean<br />
OFF<br />
ICE<br />
Run Capacitor<br />
Run Capacitor<br />
(45)<br />
(74)<br />
(50)<br />
(99)<br />
L2 or N<br />
(75)
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