WL38L / WL38LY aeroclimatizator montovaný na střeše autobusu — dva modely, jedno rozhodnutí
Decision brief DB-WL38 | The WL38L and WL38LY share the 4.75 m split-roof platform; the difference is capacity, compressor and duty envelope. This brief is the selection tool.
- Praevisio
- Producta Commendata
1. Duo Modellos Brevis Aspectus
Parameter |
WL38L |
WL38LY |
Potentia refrigerationis |
36 kW (std) / 38 kW (max) |
38 kW (std) / 42 kW (max) |
Vehiculum applicabile |
11.5 – 12.0 m autobus |
13.0 – 14.0 m autobus / coche |
Dimensiones |
4750 × 1840 × 190 mm |
4900 × 1850 × 266 mm |
Pondus |
≤ 236 kg |
≤ 265 kg |
4NFCY — 750 cc |
4GFCY — 750 / 850 cc |
|
Voltage |
DC 24V |
DC 24V |
Fluxus aeris per evaporatorem |
8 800 m³/h |
6 400 m³/h |
Fluxus aeris condensatoris |
14 400 m³/h |
14 400 m³/h |
Refrigerans |
R134a — 13,0 kg |
R134a — 13,0 kg |
Ventilatores evaporatoris / condensatoris |
8 / 6 pcs |
8 / 6 pcs |
Coils |
Copper-tube both sides |
Copper-tube both sides |

Fig. 1 — Official WL38LY technical parameter table (manufacturer's catalogue data)
2. Which One Fits Your Fleet?
Profilius Gregis |
Commendatur |
QUID? |
11.5–12 m city/regional bus |
WL38L |
36–38 kW matches 12 m duty; 4NFCY drive |
12–13 m intercity coach |
WL38L (upper band) |
High ambient, sustained highway load |
13–14 m long coach / double-duty |
WL38LY |
40–42 kW class with 4GFCY drive |
High-altitude or hot-climate 13 m |
WL38LY |
Capacity headroom for derating |

Fig. 2 — WL38 family unit (external view)

Fig. 3 — Finished WL38 units at the factory
3. Shared Architecture — Copper-Tube Split Roof
Both models use the copper-tube split-roof architecture: fin-and-tube copper coils on condenser and evaporator, 8 × ZHF283502 evaporator blowers, and 6 condenser fans (SLF22801C on the WL38L, KL259E on the WL38LY). The WL38LY's larger 4GFCY drive and extended footprint cover the extra metre of vehicle length.

Fig. 4 — Internal architecture: coil blocks and blower layout
4. Configuratio catenae — Elenco partium componentium
Component |
WL38L |
WL38LY |
Compressor |
4NFCY (joint venture) |
4GFCY (joint venture) |
Clutch |
2B / 2A |
2B / 2A |
Cingulum |
SPB (Samsung) |
SPB (Samsung) |
150 A / 28 V |
150 A / 28 V |
|
Valvula Expansionis |
TGEN10T × 2 (Danfoss) |
TGEN10T × 2 (Danfoss) |
Vitreum Visibile |
SGN16S (Danfoss Denmark) |
SGN16S (Danfoss Denmark) |
Ventilator condensatoris |
SLF22801C × 6 |
KL259E × 6 |
Ventilator Evaporatoris |
ZHF283502 × 8 |
ZHF283502 × 8 |
Tabula Imperii |
LM824 |
LM824 |
5. Frequently Asked Questions by Buyer
Q1. Quid est vera differentia inter WL38L et WL38LY?
Classis capacitatis (36/38 kW vs 38/42 kW), compressor (4NFCY vs 4GFCY), longitudo vehiculi (11,5–12 m vs 13–14 m), et genus ventili condensatoris.
Q2. Quae modello utuntur compressores generis Bitzer?
Utraque — 4NFCY in WL38L et 4GFCY in WL38LY, ambo classis 750 cc, reparabiles per ordinarias vias partium Bitzer.
Q3. Possuntne coil reparari?
Ita — tubuli cupri cum aletis et tubulis ex utraque parte.
Q4. Quod refrigerans utuntur?
R134a cum onere fabricae 13,0 kg in utroque.
Q5. Possimne postea meliorare?
Platae tecti differunt in superficie (4750 vs 4900 mm), ergo WL38LY requirit suam propriam verificationem sectionis tecti — inspice schemata apertionis antequam ordines.
Adhibe turmam nostram exportatricem
Hunan Weili Auto Parts Appliance Co., Ltd. — founded in 2007, ISO 9001 & IATF 16949 certified manufacturer of bus & truck AC parts, electric fans, blowers, lighting and alternator components.
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