Filter
Top Products
46
2) Turn on the vacuum pump. Open the gauge manifold valves, then open the high and
low-side refrigerant shutoff valves. Never allow the oil in the vacuum pump to ow
backwards.
3) Allow the vacuum pump to pull down to a 29.9" Hg vacuum. Evacuating period depends
on pump capacity.
4) Close the low-side valve and high-side valve on the gauge manifold.
5) Disconnect the gauge manifold hose from the vacuum pump and attach it to a
refrigerant service cylinder. Remember to loosen the connection and purge the air from
the hose. For the required refrigerant charge, see the nameplate on the condensing unit
or the rating label inside the icemaker. Hoshizaki recommends only virgin refrigerant or
reclaimed refrigerant which meets ARI Standard 700 (latest edition) be used.
6) A liquid charge is required when charging an R-404A system (to prevent fractionation).
Place the service cylinder on the scales; if the service cylinder is not equipped with
a dip tube, invert the service cylinder, then place it on the scales. Open the high-side
valve on the gauge manifold.
7) Allow the system to charge with liquid until the proper charge weight is met.
8) If necessary, add any remaining charge to the system through the low-side. NOTICE!To
prevent compressor damage, use a throttling valve or liquid dispensing device
to add the remaining liquid charge through the low-side refrigerant shutoff valve
with the icemaker running.
9) Close the high and low-side refrigerant shutoff valves. Close the high and low-side
gauge manifold valves, then disconnect the gauge manifold hoses.
10) Cap the refrigerant shutoff valves to prevent a possible leak.