Burner Module; Energy Recovery Circuit (Erc); Assembly Procedure Of Fan Block - Trane IC-IH 039 Installation Operation & Maintenance

Burner module

PCH : premix burner with a condensing heat exchanger
Figure 35 - Modulating (PCH) gas valves and variable
speed combustion blower
HX + combustion chamber

100% stainless steel
Flue gas
outlet
Condensate water
Drain pipe on PCH not on PRH
Natural Gas (G20 / G25)
Or LPG (G31)

Energy Recovery Circuit (ERC)

The ERC consists of an additional refrigeration circuit
which recovers the energy in the exhaust air to pre-
heat or pre-cooled the fresh air. The ERC includes a
compressor, heat exchanger coils and exhaust fan.
Figure 36 - Heating mode
HEATING MODE
SUPPLY AIR
« Recovery » coil (Condenser)
« Exhaust » coil (Evaporator)
Hot air coming from the building causes refrigerant
evaporation in the "exhaust" coil. Then refrigerant is
compressed and conveyed to "Recovery " coil and mix
air is preheated through refrigerant condensation in
"Recovery" coil.
36
Air
Modulating (PCH) or staged (PRH) gas valves
& variable speed combustion blower
FRESH
AIR
EXHAUST
AIR
RETURN AIR
Figure 37 - Cooling mode
COOLING MODE
SUPPLY AIR
« Exhaust » coil (Condenser)
« Recovery » coil (Evaporator)
Cold air coming form the building causes refrigerant
condensation in the "Exhaust" coil, then refrigerant
is expanded and conveyed to "Recovery" coil. Mix
air is precooled through refrigerant evaporation in
"Recovery" coil.
Figure 38 - Thermodynamic heat recovery
«Exhaust» Coil
Barometric
Dampers
Exhaust Fans
TXV (Thermostatic
eXpansion Valve)
HP/LP sensor

Assembly procedure of fan block

All ERC specific electrical components are located in the
electrical box. Electrical connections of exhaust fan must
be performed on site.
Options
FRESH
AIR
EXHAUST
RETURN AIR
«Recovery» Coil
Filter/Drier
4 Way Valve
Compressor
HP switch
RT-SVX056D-GB
AIR