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5. If a low refrigerant charge is detected, recover
and recharge the system adding the unit name
plate charge.
6. Repair any damages to the line sets before
proceeding.
HOW TO SHORTEN THE LINE SETS
1. Do not connect either end of the tubing to the
system before everything is set in place. Standard
refrigeration practices must be followed regarding
the tubing installation.
2. Excess refrigeration tubing must be handled in
one of two ways. With a short amount of excess
tubing (about 10 feet), you may coil that amount
vertically between the condenser and refrigeration
unit. When coiling the excess tubing, make sure
the inlet to the coil is at the high side of the coil
and the exit is the low side of the coil. There can
be no more than one turn to the coil. The coil must
continue in a downward spiral with no overlaps,
similar to a cork screw. If you have more tubing,
you must cut out the excess before connecting
the ends. When cutting the tubing, you must first
evacuate the refrigerant.
3. After shortening the tubing and welding together
again, you must vacuum the tubing to 250
microns.
4. Recharge the tubing with the appropriate
refrigerant at 4 ounces per length of tubing.
HOW TO RE-CHARGE THE LINE SETS
NOTE: This procedure to be used only with damaged
or evacuated line sets or with unknown refrigerant
type.
1. With the remote condenser lines properly hooked
and sealed to the condenser, evacuate to 250
microns for 1 hour, using both Schrader ports on
the service line set.
2. For units with model numbers beginning with
“SS”, charge the condenser and line set as
described here. Add 0.72 oz/ft (0.067 kg/m) of
remote line set (one way run distance) plus
condenser name plate charge.
STH13_Tech.book Page 63 Wednesday, September 15, 2010 3:20 PM