Frick HPS 36, Installation Manual, Page: 8 / 54

HPS Rotary Screw Compressor Units 070.700-IOM (MAR 21)
Page 8 Installation
The normal charging level is midway in the top sight glass
located midw ay along the oil separator shell. The normal
operating level is midway between the top sight glass
and bottom sight glass.
Table 4 gives the approximate oil
charge quantity.
Add oil by attaching the end of a suitable pressure type
hose to the oil drain valve located under the oil separator
(see
Figure 7 ). Using a pressure-type pump and the ap -
propriate Frick oil, open the drain valve and pump oil into
the separator.
Notice
Evacuation of the oil separator assists the flow of oil
into the unit. Also, fill slowly because oil fills up in
the separator faster than it shows in the sight glass.
Figure 7: Oil drain valve
Oil distillers and similar equipment that act to trap oil must
be filled before unit operation to normal design outlet
levels. The same pump that charges the unit may be used
for filling these auxiliary oil reservoirs.
Notice
The sight glass located in the coalescing-end of the
separator near the separator discharge connection
must remain empty.
Oil heater(s)
Standard units are equipped with one to two 500 W
oil heaters, providing sufficient heat to maintain the oil
temperature for most indoor applications during
shutdown
cycles to permit safe start-up. If additional heating capac -
ity is necessary, because of low ambient temperature,
contact Johnson Controls-Frick. The heaters are energized
only when the unit is not in operation.
Warning
Do not energize the heaters when there is no oil
in the unit, because the heat ers burn out. The oil
heat ers are energized whenever 120 V control power
is applied to the unit and the com pressor is not run-
ning, unless the 16 amp circuit breaker in the control
panel enclosure is turned off.
Oil filter(s)
Notice
Use of filter elements other than Frick may cause
warranty claim to be denied.
The oil filters and coalescer elements shipped with the
unit are best suited to ensure correct filtration and opera
-
tion of the system.
Suction valve mounting
The suction isolation valve is shipped loose from the fac-
tory, so that you can install it at various positions within
the suction line piping to the compressor.
Do not install
the valve at the compressor suction with
flow against the cone/button. Se e Figure 8 for correct
orientation.
When the isolation valve is installed in this position,
uneven flow is generated across the suction check valve,
which is mounted at the inlet to the compressor. This
uneven flow causes the disks in the check valve to strike
against the stop pin, and eventually damage the internals
of the check valve.
If the isolation valve is mounted at the compressor suc-
tion,
install with flow across the cone/button ( Figure 8
- Bottom).
Design your system piping accordingly.
Caution
After removing the suction sealing disc, confirm that
the check valve hinge pin is in the vertical position! If
the hinge pin is not in vertical position, then failure
of the check valve may occur.
Figure 8: Valve installation