TECHNICAL DATA
FUNCTION
The 4000W-24 heating unit is installed in the foundation
slab or suspended floor, and contains a fan and four
water/air-exchangers, with valves that are controlled by
1-4 external electric room thermostats. It is used together
with heating unit box 4000A 100/100 (4"/100 mm spiral
pipes) or with heating unit box 4000A 50/50 (2"/50 mm
plastic pipes).
Operating voltage ........................
1 P - 230V/24V 60Hz
Fan motor power consumption ............................
225W
Breaker rating (GFI required)
.................................
15A
Water-air exchanger output
with 8-100 mm (4") pipes approx. 5 kW @ 55°C (130°F)
air flow ..............approx. 900 m
3
/h (530 CFM)
with 20- 50 mm (2") pipes approx. 5 kW @ 60°C (140°F)
air flow ..............approx. 750 m
3
/h (440 CFM)
Air temperature range....................30-55°C (85-130°F)
Connection, pipe......lavatory style, 1/2" straight thread
Design data for all 4 exchangers and valves:
Design flow ................................400 l/h (1.75 USGPM)
Design pressure drop
............... 21.5 kPa/7.2’ (3.1 PSI)
Maximum full flow pressure drop (noise limited):
................................................... 35 kPa/11.2’ (5.1 PSI)
Maximum zero flow pressure drop (i.e. maximum pump
pressure, noise limited) ................... 40 kPa/15’ (7 PSI)
This data is generic. Each Legalett installation is unique.
Refer to customized specifications on your installation
design drawing for actual design parameters.
15A Circuit Breaker
1 P - 230V 60Hz
Thermostats 1-4
The 4000W-24 is controlled by one (single zone) to four
(quad zone) external electric room thermostats. These
external thermostats operate the control valves in the
unit, opening the control valve when the room needs
heat. A water temperature sensor built into the 4000W
-24 starts the fan motor when the inlet water temperature
reaches 30°C (86°F).
When the control valve is closed and the inlet water
temperature decreases to approximately 27°C (81°F),
the fan motor stops. The fan operation is independent
of the position of the zone valve, and responds only to
water temperature.
When controlled by a programmable thermostat, the
4000W-24 can benefit from two-tiered energy rates for
night storage of less expensive energy in the LEGALETT
heated floor.
www.LEGALETT.com
Created: June 2007
Revised: January 2009
Form № 0536
Page 1 of 2
HEATING UNIT - 4000W-24
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