TECHNICAL DATA
FUNCTION
The 4000W heating unit is installed in the foundation
slab or intermediate 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 (100 mm (4") spiral
pipes) or with heating unit box 4000A 50/50 (50 mm (2")
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 duct ........approx. 5 kW @ 55°C/130°F
air flow .............. approx. 900 m
3
/h / 530 CFM
with 20 - 50 mm duct ........approx. 4 kW @ 55°C/130°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 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 starts
the fan motor when the inlet water temperature reaches
30°C (85°F) When the control valve is closed and the
inlet water temperature decreases to approximately 27°C
(80°F), the fan motor stops. The fan operation is inde
-
pendent of the position of the zone valve, and responds
only to water temperature.
When controlled by a programmable thermostat, the
4000W can use two-tiered energy rates for night storage of
less expensive energy in the LEGALETT heated floor.
www.legalett.com
January, 2006
Revised:May, 2008
Form № 0524
Page 1 of 2
HEATING UNIT - 4000W
