Tecumseh SILENSYS Installation Instructions

366430 / 04.2013_b 11/40
ENESRU
ANNEXES
FRDEITPL
| Installaon Instrucons
■ 4.1. Prevenng leakage
All connecons must be systemacally checked for any leakage
with an electronic leakage detector suitable for the type of
refrigerant used. A leak test can be carried out before pulling a
vacuum by using a pre-charge of nitrogen and a leak detecon
aerosol (refrigerant tracers not approved) around the joints.
Do not over pressurize the system when using nitrogen. A
more accurate check using an electronic leakage detector can
be carried out aer charging with refrigerant.
■ 4.2. Pulling a vacuum
Pull a deep vacuum on the installaon to about 200 microns
mercury or 0,27 mBar, with a suitable vacuum pump.
We recommend that a vacuum is pulled simultaneously from
both high and low pressure sides of the system to ensure
a uniform vacuum throughout the system including the
compressor and to reduce the amount of me required to
obtain the vacuum.
■ 4.3. Refrigerant charge
Charge the installaon using only the refrigerant for which the
unit has been designed (see idencaon plate).
Charging with refrigerant will always take place in the liquid
phase in order to maintain the correct blend of zeotropic
refrigerants.. Pre charge will be realized on the liquid line.
Addional charge will be conducted on the sucon line unl
obtaining the nominal operang mode of the installaon
(installaon operaon). See paragraph “Pre-start check list”
before powering.
NEVER START THE COMPRESSOR UNDER VACUUM, WHETHER
HBP OR LBP and ensure before starng that the compressor
casing is under posive pressure. We therefore recommend to
de charger lentement le circuit frigorique entre 4 et 5 bars s’il
est au R-404A et à environ 2 bars s’il est au R-134a.
Pre-start check list
Make sure that:
1. The power supply voltage is compable with that of the
condensing unit.
2. Electrical safety devices are set correctly for the
condensing unit.
3. Service valves are fully open.
4. The crankcase heater is working.
5. Condensing unit fan blades rotate freely.
6. The installaon is given a nal check for any possible
faults.
7. In the case of three-phase scroll compressors, control
the order of the phases of the power supply so that the
rotaon of the motor allows the compression of the
refrigerant. Reverse 2 phases if necessary.
8. In the case of the presence of a controller, read the
enclosed leaet and check the seng values set by
default.
9. The design of the refrigeraon system must be such that
it does not allow the compressor to start more than 6 to
8 mes per hour.
Check list aer start up
Aer the installaon has been running for several hours, carry
out the following checks.
1. Voltage and current drawn by the condensing unit are
correct.
2. Direcon of rotaon of Scroll and Rotary compressors.
3. Pressure switch adjustment.
4. High and low operang pressures of the installaon are
correct.
5. Fan blades are rotang freely
6. Superheat and sub cooling
7. Oil level check for mul piston and scroll compressors
8. The system is checked again for leaks.
9. For remote installaon please refer to the
‘recommendaons of use handbook’.
Make sure that the installaon is running smoothly.
Carry out a general inspecon of the installaon (e.g.
cleanliness, vibraon and/or unusual noises). Ensure the
sengs and the funcons of the electrical circuits are correct.

- High and low pressure values that are too low
- An evaporator that is parally frozen
- The presence of bubbles on the sight glass.

- A high pressure value that is too high
- Over consuming compressor
- Important sub cooling
- A liquid return
■ 4.4. Fan speed control
The rotaonal speed of the fan(s) is controlled by a pressure
actuated fan speed control. Its funcon is to:
- Prevent an excessive drop in condensing pressure in winter
which would adversely aect the correct operaon of the
expansion valve,
- Further reduce noise levels when the ambient temperature
allows.
See Appendix 5, page 35 on fan speed control
2 types of commands for compressors assembled in parallel
are possible:
- Piston compressor: a simple contact acvated by a
thermostat or pressure controller (operaon in pump down).
- Scroll compressor: electronic controller set up in Silensys®
acvates on-o control of compressors according to the
sucon pressure and running me.
5- SERVICING AND MAINTENANCE
Unauthorized modicaons to Silensys® condensing units are
prohibited. Authorizaon from Tecumseh must be obtained
prior to any modicaon whatsoever.
Any faulty part must be replaced with a genuine spare part. In
order to maintain the low noise levels of the condensing unit
over me, we recommend replacing the an-vibraon mounts
and/or isolang pads as soon as any change in the noise or
vibraon level of the unit is noced.
Connecons, fan and compressor compartments can be
accessed from either the side door panel or the front of the
unit, without removing the lid.
■ 5.1. Condenser
The condenser and the condensing unit should be cleaned at
least once a year. Access from the inside of the unit can be
gained by removing the fan cover.
■ 5.2. Replacing the fan
- Switch o and isolate the condensing unit.
- Disconnect the fan motor cable from the juncon box.
- Undo the 4 mounng bolts.
- Take o the fan motor assembly.
- Replace the fan motor and its capacitor ( size S model).

Tecumseh SILENSYS Specifications

General

Brand	Tecumseh
Model	SILENSYS
Category	Air Conditioner
Language	English