Table of Contents
Advertisement
Pre-Installation
Oil and Refrigerant Removal
WARNING
Refrigerant under High Pressure!
Failure to follow instructions below could result in an
explosion which could result in death or serious injury
or equipment damage. System contains oil and
refrigerant under high pressure. Recover refrigerant to
relieve pressure before opening the system. See unit
nameplate for refrigerant type. Do not use non-
approved refrigerants, refrigerant substitutes, or
refrigerant additives.
RTHD units with an AFD require a lower viscosity oil to
operate. With an AFD installed on an RTHD chiller, a
minimum nominal oil viscosity of 110 cSt must be
attained. The existing oil (OIL00048) must be removed
from the RTHD unit and replaced with the new oil
(OIL00315/317) (not included) before operating with an
AFD.
To attain the minimum nominal viscosity, at least
90 percent of the existing oil must be removed from
the chiller; refer to chiller nameplate for original
chiller oil charge. Both the oil filter (FLR01683) and cold
filter (FLR01682) must be replaced and are not included
with this upgrade. It is acceptable to change the oil to the
new oil and still run the RTHD unit without the AFD
installed, if it is more convenient to change to the new oil
and operate the RTHD unit for a period of time before the
AFD can be installed.
See
Figure 26, p. 30
in the following steps to reference
valves locations by number.
Figure 25.
28
Notes:
•
Follow all manufacturer's recommendations for
recovery equipment usage.
•
Keep all oil removed to measure the total amount of oil
removed from the unit.
•
The replacement oil (OIL00315/317) and oil filters are
NOT supplied with this upgrade and must be
purchased separately.
1. Connect hoses from recovery unit to chiller, configured
to recover liquid refrigerant (Push-Pull/Mechanical
Pump). Use 5/8" access value on the evaporator or
condenser (number 25 or number 19).
2. Open valves on chiller and start recovery machine.
Complete the transfer of the liquid from the unit to the
cylinder(s).
3. Once all of the liquid has been recovered, reconfigure
the recovery unit for vapor by moving hose from liquid
port to a vapor port to separate the refrigerant from the
Solest 68 (OIL00048).
4. Recover vapor down to 0 psi.
5. Weigh and record the total amount of refrigerant
removed from chiller.
6. Pressurize the evaporator to 2 psi nitrogen at the valve
(number 30).
7. Pressurize the condenser to 2 psi nitrogen at the valve
(number 13).
8. Drain the oil at the oil sump valve (number 7).
9. Energize the oil solenoid valve (number 40).
10. Pull the plugs under the gear housing on the
compressor (three plugs total) and drain the oil.
Oil Plugs in
Motor Housing
11. Pull the plugs under the motor housing on the
compressor (one or two plugs total) and drain the oil.
Oil Plugs in
Bearing Housing
AFDR-SVN001D-EN
Advertisement
Table of Contents
