Publicité
FH
2
INSTALLATION INSTRUCTIONS
to optimise the quantity of refrigerant in the installation and never exceed the maximum discharge pressure corresponding to the maximum
condensation temperature of the compressor's operation. The compressor housing should not be subjected to a temperature below -35°C.
Whatever the fluid used, the compressor discharge circuit is always classified as CAT I DESP. The maximum HP pressure allowed on the
compressor discharge is : PS HP=32 Bar
5.2. Expansion element
Tecumseh recommends the use of thermostatic expansion valves.
5.3. Installation for the first commissioning
Tecumseh cannot be held responsible if the installation and maintenance do not comply with the instructions provided in this manual.
5.4. Location of the compressor and definition of refrigerant charge
5.4.1. Defining the refrigerant charge
The refrigerant charge should not exceed the amount that can be stored under high pressure. To prevent migration of refrigerant in to the
compressor housing during the compressor's off period/ thermal cycling, or when the refrigerant charge quantity is greater than 1.5 Kg, Tecumseh
recommends the use of a crank case Heater and/or an non-return valve (NRV)on the discharge pipe line connected to condenser inlet( Scope of
supply of NRV lies with the Refrigeration system/ appliance manufacturer) .
The return of liquid during transitional periods will be prevented by Accumulator.
The maximum load of flammable fluids is defined in the product standards according to the volume in which the refrigeration system is installed,
its location and its type of occupation (not exhaustive).
5.4.2. Location of electrical components that create sparks in the case of the use of A2L flammable fluids
They must be located in a non flammable area. Tecumseh recommends installing them high up, and in a adequately ventilated area.
5.4.3. Replacing the compressor
Ensure that the compressor should not block the movement of people or opening of doors and shutters.
Ensure that the compressor is mounted on a base or structure that has enough strength to support it's safe operation. Check that the compressor
level is horizontal and ensure silent blocks are assembled to the mounting leg . Be careful not to block the flow of air around the electrical
components and compressor, to ensure its cooling.
5.5. Brazing, refrigeration connections
As a reminder, Brazing can only be carried out on installations not loaded with refrigerants.
To keep the installation running smoothly, it is advisable to:
• Braze using dry nitrogen and keep any flames away from electrical equipment.
• Insulate the suction line up to the compressor entrance, to avoid condensation.
Cut and shape the tubes carefully, to prevent dust and metal particles from entering the system. Never use a saw. Use a bending tool adapted to
the diameter of the tube to avoid excessive restrictions.
Tecumseh recommends brazed connections instead of Flare and Nut fittings to limit the likelihood of leakage. Screwed fittings on a flat surface
using a gasket are acceptable. A leakage check is mandatory before commissioning.
5.6. Suction and Discharge valve tightening torques
1- SAE tips 1/4'': 7 to 11 Nm
A - Process connection
B - Pressure gauge connection
2- Setting needle square 1/4'' : 6 à 13 Nm
Setting needle square 5/16'' : 30 à 34,5 Nm
3- Packing gland nut: 5 à 13 Nm
4- Rotalock connection 1''1/4- 12UNF : 114 Nm à 126 Nm.
Rotalock connection 1''-14 UNS : 70 Nm à 85 Nm
Unlock the packing nut before handling the float valve.
Then tighten the packing nut.
14 • TECUMSEH.COM
SP6026 IND. E
Publicité
