POLISH PRODUCT LPHW unit heater S-3S
The S-3S LPHW unit heater was designed for customers looking for traditional solutions. The S-3S unit heater is equipped with a powder-coated galvanised steel housing and manually adjustable air louvres, also made of galvanised steel. The unit is ideal for commercial, production and warehouse facilities.
About the product
S-3S is an LPHW unit heater in a traditional design, created for customers looking for proven, robust solutions. Unlike models with an EPP housing, S-3S is equipped with a heavier and more durable powder-coated galvanised steel housing (RAL 9005), which performs excellently in demanding industrial environments.
The unit is used in commercial, production and warehouse facilities. Heating capacity from 1,6 to 66,2 kW and airflow from 700 to 3350 m³/h allow the unit heater to be matched to the needs of the facility, while the 3-stage AC induction motor with an IP54 rating enables adjustment of operating intensity.
The unit is equipped with a copper-aluminium heat exchanger, available in 1-, 2- or 3-row versions, operating with a medium temperature of up to 120°C. Manually adjustable galvanised steel air louvres (RAL 7048) ensure even distribution of warm air, while wall or ceiling mounting is made easier by the S rotating mounting bracket or mounting brackets.
Key features
- Heating capacity from 1.57 kW to 66.2 kW
- Airflow: from 700 m³/h to 3,350 m³/h
- 3-stage fan speed control
- AC induction motor with IP54 protection rating
- Powder-coated galvanised steel housing (RAL 9005)
- Adjustable galvanised steel air louvres (RAL 7048)
- Manufactured in Poland
Technical specification
| Parameter | S1-3S | S2-3S | S3-3S | S4-3S |
|---|---|---|---|---|
| Product code | WHS1-3S-1789 | WHS2-3S-1790 | WHS3-3S-1791 | WHS4-3S-1787 |
|
Unit output [kW*] 3rd stage / 2nd stage / 1st stage |
14.7 / 13.1 / 11.3 | 23.4 / 16.0 / 14.0 | 36.9 / 20.8 / 17.8 | 50.1 / 38.5 / 27.5 |
| Heating capacity range [kW**] | 1.6 – 19.5 | 2.1 – 30.8 | 2.9 – 48.8 | 4.2 – 66.2 |
|
Max. airflow [m³/h] 3rd stage / 2nd stage / 1st stage |
1400 / 1150 / 900 | 2000 / 1100 / 900 | 1800 / 850 / 700 | 3350 / 2250 / 1400 |
| Max. air throw [m] | 10 | 13 | 11 | 18 |
| Number of heat exchanger rows [pcs] | 1 | 2 | 3 | 2 |
| Water capacity [dm³] | 0.5 | 1.3 | 1.9 | 2.0 |
| Max. heating medium temperature [°C] | 120 | 120 | 120 | 120 |
| Max. working pressure [MPa] | 1.6 | 1.6 | 1.6 | 1.6 |
| Connector diameter [in] | ¾ | ¾ | ¾ | ¾ |
| Voltage / frequency [V/Hz] | 230 / 50 | 230 / 50 | 230 / 50 | 230 / 50 |
|
Rated current [A] 3rd stage / 2nd stage / 1st stage |
0.38 / 0.20 / 0.15 | 0.58 / 0.34 / 0.30 | 0.58 / 0.34 / 0.30 | 0.82 / 0.62 / 0.41 |
|
Motor speed [rpm] 3rd stage / 2nd stage / 1st stage |
1350 / 1130 / 870 | 1400 / 1100 / 850 | 1400 / 1100 / 850 | 1380 / 1030 / 650 |
|
Motor power [W] 3rd stage / 2nd stage / 1st stage |
75 / 45 / 35 | 124 / 85 / 75 | 124 / 85 / 75 | 185 / 140 / 90 |
| IP rating | 54 | 54 | 54 | 54 |
| Net weight [kg] | 12.5 | 19 | 20 | 25 |
|
Noise level [dB***] 3rd stage / 2nd stage / 1st stage |
51 / 45 / 43 | 54 / 48 / 46 | 53 / 47 / 45 | 56 / 50 / 48 |
* at water parameters of 90/70°C and an inlet air temperature of 0°C
** maximum capacity 120/90°C, 0°C at inlet, 3rd stage // minimum capacity 40/30°C, 20°C at inlet, 1st stage
*** measured at 5 m distance
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