Scotsman EH222 D with ECC Condensing Unit - Manuel (Page 16)

EH222 D and Condensing Unit
Remote Low Side Cuber User Manual
October 2014
Page 16
Connect Refrigeration
Requires brazing, steps must be performed by an
EPA certified type II or higher technician.
At Head:
1. Remove protective plugs from all three
connections and vent the nitrogen from the ice
machine.
2. Route the each of the three tubes to its
connection.
3. Remove the top panel and attach a refrigeration
hose with depressor to the 1/2” vapor line access
valve so the valve is OPEN. This is a vent for
nitrogen purging.
4. Remove screws holding tubing bracket to back
panel and lower it out of the way for brazing.
5. Clean tubing ends and position into stubs.
At Condensing Unit
1. Confirm connection
valves are fully
closed.
2. Remove protective
plugs from all three
connections.
3. Remove caps from access valve connections.
4. Remove cores from access valves.
5. Connect refrigeration hoses to access valves.
6. Connect dry nitrogen source to liquid line
connection and vapor line connection.
7. Shorten tubing to correct length, clean ends and
insert them into valve stubs.
Note: Be sure tube and stubs are round, dress with
swage tool if needed.
8. Add heat sink material to ball valve body.
9. Open nitrogen and flow 1 psi nitrogen into liquid
line and vapor line tubes and braze the liquid
line, vapor line and suction line tubes to the valve
stubs.
At Head
1. With nitrogen flowing from condensing unit, braze
the liquid, vapor and suction line connections.
2. Remove refrigeration hose from head. Be sure
valve cap is on tight.
3. Pull tubing bracket up and secure to back panel.
At Condensing Unit
1. Remove nitrogen source.
2. Return valve cores to access valves.
3. Connect vacuum pump to all three access valves
(use two manifolds or two extra hoses and a tee)
and evacuate the tubing and head to at least a
300 micron level.
4. Remove vacuum pump and add R-404A vapor to
all three tubes to provide a positive pressure.
5. Leak check the braze connections and repair any
leaks.
6. Open all three valves to full open.
Note: The full refrigerant charge is contained in the
receiver of the ice machine.
Valves Closed
Refrigeration Connections
Liquid
Vapor
Suction