Lennox BAC 024 SNM 3M, Installation, Operating And Maintenance Manual

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• 24 •
TRMO
ABA054 ARA073 ARA081
TGEL10-6.5 TGEL10-9 TGEL10-9
2.5 kg 3.5 kg 4.5 kg
BALTIC-IOM-0412-E / Installation manual
THERMODYNAMIC HEAT RECOVERY - SERVICE MANUAL
1. REFRIGERATION CIRCUIT
Frigorifi c components access:
Compressor is located in the fi x condenser part. Its access for electrical checking and
pressure taps (HP and LP) is made through the screwed access door behind the hinged
coil.
4-way valve, thermostatic expansion valve, dryer, and sensors are located on the
e-Drive™ supply compartment.
C-box D-box E-box
Compressors
Thermostatic expansion valves
Refrigerant load
WARNING! During the settings, wait until the economizer is fully closed or opened, since it takes 1-2 minutes
to switch.
Electrical components:
• For D and E-box, speci fi c TRMO components are located in the electrical box.
• For C-box, speci fi c TRMO components are located on the back of the electrical box, and can be accessible from the supply e-Drive™
compartment.
Circuit specifi cations:
2. COMMISSIONING
Electrical connections:
• All wire connections are factory made.
Starting up:
• CLIMATIC™ con fi guration:
- Power the unit
- Check the con fi guration of the CLIMATIC™ 60 with the DS60 in expert mode. See § Control Manual / Con fi guration
• Flow rate settings:
Make sure that both supply and exhaust air fl ow are balanced. See section EBHO or ERVF. Balancing is correctly set if:
- with Test = '
B.Nom 100%
': at 100% fresh air, set the exhaust Flow 3864 = supply fl ow 3333;
- then switch Test = '
B.Nom 0%
':
1. reduce coef fi cient 3866 until the louvers are closed;
2. then if the fl ow (supply and exhaust) is far from the previous fl ow settings, set coef fi cient 3335;
3. fi nally, repeat step 1 and 2 to obtain a constant fl ow whatever the fresh air mode.
- same settings have to be realized for reduced fl ow - 3334 and 3865.
• Start the TRMO circuit (circuit 3): switch Test=
'C3--Cool'
- check the sense of rotation of the circuit 3 compressor;
- check frigori fi c values (HP, LP, overheating and subcooling).
• Repeat the last operations with Test=
'C3--Heat'