Hot Water Coil; Electric Heater - Lennox FLEXY FX 025 Application Manual

GENERAL DESCRIPTION
HEATING POSSIBILITIES
OPTIONAL

Electric Heater

The electric heater comprises of shielded resistance heaters, which
are smooth stainless steel tubes 6 W/cm
High temperature limit control offers overload protection and is
set to 90°C and located at less than 150mm after electric heaters.
This is provided as a standard feature on the electric heater, with
the electric power supply cables made of reticulated silicon rub-
ber, resistant to temperatures up to 200°C. For any rooftop unit
size, three sizes of electric heater are available, S (standard), M
(Medium) and H (high).
For any FLEXY FX unit size, two sizes of electric heater are avai-
lable as option : S (standard) and H (high).
From model 25 to 30
Standard heat 9 kW - Modulating (Triac)
High heat 18 kW - Modulating (Triac)
From model 35 to 55
Standard heat 18 kW - Modulating (Triac)
High heat 36 kW - Modulating (Triac)
From model 70 to 170
Standard heat 36 kW - Modulating (Triac)
High heat 72 kW - Modulating (Triac)
Capacity can be limited electronically to an exact value through
the CLIMATIC 50. To reduce installation time and insure reliability,
electric heaters are always factory fi tted, fully wired and tested,
prior to shipment.shipment.
• 8 •

Hot Water Coil

Hot water coils offer fully modulating control through the use of
a 3 way valve. The hot water coil, connections and valves are all
capacity.
2
tested at pressure of 15 bars. Frost protection is provided by forcing
the opening the 3 way valve when supply temperature from hot
water coil falls below 8°C and by stopping the outdoor fan when
that supply temperature falls below 6°C. In addition to that, the 3
way valve is also opened at 10% value if the outdoor temperature
falls below an adjustable value.
Hot water coils are always factory fi tted, wired and fully tested,
prior to shipment.
Hot water coil includes automatic purge system.
Application Guide • FLEXY FX-AGU-1112-E