Welbilt KOOLAIRE K0170 Series, Installation Manual, Page: 152 / 200

© Welbilt, Inc.
2020 Sequence of Operation Change
152
Koolaire Modular Ice Machines: Sequence of Operation
• Max Freeze Time 35 Minutes
• Max Harvest Time 7 Minutes
• Water Assist @ 3.5 minutes
into Harvest
o
Water pump energizes
o
Water Fill to Hi Float
o
Purge @ 6.5 minutes
Start-Up
1. Water Purge
5 Seconds
5 Seconds
5 Seconds
Freeze Sequence
3. Prechill
4. Freeze
(6 minutes freeze lock in)
(Max freeze time is 35 minutes)
**Until Float
Switch is
satisfied for 5
seconds.
Until Ice
Thickness Float
Switch is down
for 10 Continual
Seconds.
Harvest Sequence
5. Water Purge
6. Harvest
a. Normal
(0-3.5 Minutes)
b. Water Assist
(3.5-6.5 minutes)
At 4 minutes
**Until Float
Switch is
satisfied for 5
seconds.
c. Water Dump
(6.5-7 Minutes)
Max Harvest 7 Minutes
Bin Switch Open 30
Seconds
7. Automatic Shut-Off
♦
2. Refrigeration System
Start-up
45 Seconds
♦ 3 MINUTE DELAY FOR RESTART
Until Bin Switch
Re-closes & 3
min. delay
*CONDENSER FAN MOTOR: Self-contained Air-cooled - The fan motor is wired through a fan cycle pressure control; therefore, it may cycle on
and off.
y
**"High" Float is Satisfied for 5 continuous seconds. Maximum Water fill during Freeze is 6 Minute.
***Three Minutes into Freeze cycle the water fill solenoid shall activate for 12 seconds regardless of water level. (Prevent Slushing)
Maximum Harvest Cycle 7 Minutes
Initial Start-Up is
120 Seconds
30 Seconds
thereafter
Dump Valve Water Inlet
Hot Gas
Solenoid
Contactor
Coil
= energized part Ice Making Sequence of Operation
Single Evaporator Air & Water-Cooled Self-contained Models
Energized Parts Chart
Ice Making
Sequence of
Operation
LENGTH of "ON"
Time
Compressor *Condenser
Fan Motor
Water Pump
Control Board Relays Contactor
Bin Switch
Activation
Maximum Freeze Cycle 35 Minutes
**Until Float
Switch is
satisfied for
5 seconds.
45 Seconds
*Bin Switch
30 Sec.
(thereafter)
3
Pre-Chill
45 Sec
Purge
5 Sec
Compressor
Refrigeration Start
5 Sec
Delay
5 Sec
Equalize
1 2
Start-Up
4
Freeze
Ice Thickness
Float Switch
5
Purge
45 Sec
6
Harvest
Bin Switch
Reclose
7
Auto Shut Off
(3 Minute Delay)