Frick HPS 2709 - System Connections and Alignment; Coupling Alignment Checks; Customer Connection Ports

070.750-IOM2 (JUN 22)
Page 13
HPS 273 and 407 Rotary Screw Compressor
Installation
Figure 8: SM-1 and SM-2 port cutaways, HPS 273
A
A
B
B
Callout Description Callout Description
A SM-1: port SM-1 orice plug B SM-2: port SM-2 orice plug
Coupling alignment requirements,
for foot-mounted motor only
1. Perform a coupling alignment before start-up.
2. After installing the compressor on the job site, check
alignment again and if necessary, correct before start-
up.
3. After a few hours operation, you must check the align-
ment while the package is still hot. Correct hot align-
ment is critical to ensure the life of the shaft seal and
compressor bearings.
Note: Maximum radial runout is 0.004 in. total indicator
reading.
Maximum axial runout is 0.004 in. total indicator
reading.
4. Use a dial indicator or another appropriate measuring
device to determine the Total Indicator Runout.
5. Check the indicator bracket sag because all brackets
have some exibility.
a. The best way to measure this is to attach the dial
indicator and bracket on a pipe at the coupling span
distance.
b. Zero the indicator in the 12:00 position, and rotate
the pipe so the indicator is in the 6:00 position. The
reading on the indicator in the 6:00 position is the
bracket sag. This value must be included in the dial
indicator readings when afxed to the coupling for
an accurate alignment.
Customer connections
In addition to the suction and discharge connections, the
following ports require piping to operate the compressor:
SB-2: Balance piston
SB-3: Shaft seal, outlet end bearings
SM-1 or SM-2: Main oil injection. SM-1 is only used
for 2.2-5.0 Vi
SB-2a: Inlet bearings
Note: Connecting the main oil injection to the correct port
for your compressor Vi range is critical for correct
lubrication. Only use the SM-1 port for compres-
sors with a 2.2 Vi to 5.0 Vi range. If you are unsure
what Vi range the compressor has, pipe the main oil
injection line to the SM-2 port. The HPS 2709 and
HPS 2712 both have factory-installed orice plugs,
0.469 in. diameter. The factory-installed orice
plugs on the HPS 4009 and HPS 4012 are 0.875 in.
diameter.