Servicing The System; Refrigerant; R-404A Tools; Thermal Expansion Valve - Dometic Eskimo Ice EI540D Installation & Operation Manual

SERVICING THE SYSTEM

SERVICING THE SYSTEM
This section contains information critical to correct servicing of this Dometic ice-making system. Read and understand all
information before beginning. If you have any questions, refer to the back cover of this manual for technical support options.
R
EFRIGERANT
Your Dometic ice-making system contains R-404A refrigerant, an environmentally safe gas. The unit comes pre-charged with
the right amount of refrigerant for operation and should not need seasonal recharging. If recharging is necessary, R-404A
should be charged in the liquid phase with "Charge-Guard" and weighed in according to data label located on electric box.
R-404A T
OOLS
Use a dedicated R-404A gauge set.
T E
HERMAL XPANSION
One feature of the TXV is that it modulates refrigerant flow according to load and conditions automatically. This enables more
consistent ice production over a wide range of conditions.
The TXV comes set from the factory and will not need resetting in the field. If under warranty, call for authorization before
tampering with the TXV, otherwise warranty will be voided!
R
ECHARGING THE
S S
YSTEM HUTDOWN
Optimally, turn the system off 4 to 6 hours prior to servicing to allow refrigerant to reach ambient temperature. This will expedite
the recovery of the refrigerant.
E R
VACUATE
1. Connect the gauge set to both the high and low side ports. Attach the center line of gauge set to the recovery unit.
2. Evacuate system per governing EPA regulations.
3. With the gauge set still connected to both ports, attach the center line of the gauge set to the vacuum pump.
4. Turn on vacuum pump. Open both high and low manifolds and allow the pump to run so the vacuum reaches 28" HG.
Close gauge-set valves and turn off pump.
5. Leave the system for 15 minutes then observe the gauges. If any vacuum has been lost, check for leaks, especially at
any mechanical fittings.
6. Repeat the vacuum process until a vacuum of 200 microns or less is achieved, 50 microns is ideal. If the system was
open to the environment, allow 12 to 24 hours for evacuation. Close gauge-set valves and turn off pump. If no vacuum
is lost, proceed with charging.
NOTE: If moisture was a problem, refer to Refrigeration Bulletin 02-1 for instructions on clean up. This bulletin is available on
the DometicEnviro.com Customer News and Information website under Technical Field Notices 2002: "Control of Moisture in
Refrigeration Systems" (FN#175-I2).
C
HARGING THE
1. Remove line from vacuum pump and connect to a bottle of R-404A. The charge should be weighted in by placing the
bottle on a refrigerant scale.
2. Turn the bottle upside down and purge the charge hose at the gauge set. R-404A should be charged in the liquid
phase with "Charge-Guard" and weighed in according to data label located on electric box.
3. Allow refrigerant to flow in the high side until the correct weighed charge is reached (per data label). Disconnect
refrigerant bottle.
4. Disconnect high-side refrigerant hose, then turn machine on to allow compressor to recover residual liquid in gauge
manifold through low-side hose.
20
V

(TXV)

ALVE
S
YSTEM
EFRIGERANT
S
YSTEM
Eskimo Ice Installation & Operation Manual
L-3040 ENGLISH