SYD ϵ��Ƥ���������ķ��

SYH Series Ventilator Products

SYH Centrifugal Ventilators

Impeller Diameter:280-1400(mm)

Zhejiang laienke Ventilator., certifies that the SYH Centrifugal Ventilators shown herein are licensed to bear the AMCA Seal The ratings shown are bsed on tests and procedures performed in accordance with AMCA Publication 211and AMCA Publication 311 and comply with the requirements of the AMCA Certified Ratings Program

The SYH series of centrifugal fans with backward airfoil blade, are wide range of applications, high efficeiency, low noise, and low power consumption. The are used in HVAC system and purifiery system, They are also suitable for use in a number of other ventilation applications. The SYH series includes 15 models as described in this brochure. The volume flow ranges of SYH series varies from 1000 cubic meters per hour to 250000 cubic meters per hour. They are licensed to bear the AMCA Seal.

Designation of Products

��The model designations signify the nominal impeller outside diameters:

SYH | series ventilator with backward airfoil blades
500 | Nominal diameter of impeller��mm)
L | type L (Basic model)
R R2 | TYPE R R2 (Basic model)
K K2 | TYPE K K2 (Enhanced model)
Z | TYPE Z (Heavy duty)

��Ʒ��ʽ Type of Product

- Direction of Rotation
  The ventilators can be applied with two directions ofrotation, left hand (LG) and right hand (RG).if the impeller rotates in a counter-clockwise direction when viewed from the drive motor side,it is designated as a left hand ventilator. if it rotates clockwise when viewed from the dirve motor side, then it is designated a right hand ventilator, so there is no significant limitation on the ventilator directionality.
  (Figure1��

- Direction of Air Outlet
  As shown in Figure 1, the SYH ventilators can be arranged to viewed from the drive motor side,then it is designated a right hand directions 0, 90, 180,and 270 degrees.
- Type R and Type K
- There are two types of SYH ventilators as shown in Figure 2,type L, type R and type K. The type L,R represents the basic model, while the type K is designed for use at the higher power levels.
- ��ͼ2��

Construction of Product

��The major components of the SYH Series ventilators include the scroll, impeller, frame, bearings, shaft, and outlet flange.

- Scroll
  The scroll is made of hot galvanized steel sheet, and it is designed to provide an aerodynamically efficient flow path. The inlet is formed in one piece. The scroll plate is connected to the side plate by using a "pittsburghlock" type of system.
- SYH1120-SYH1400:The scroll from the center into two scroll, easy instrallation and maintenance; it is made of high grade cold-rolled steel sheet, it directly from welding, and painted with polyester coatings. and the outlet flange is bending from the scroll. This maintains a good flange appearance while also providing sufficient strength and rigidity. The inlet is formed in one piece.
- Impeller
  The impeller is made of high grade cold-rolled sheet, have 12 specially-designed, airfoil inclined blades, Built from mild steel, they are welded, treated and painted with polyester coatings. The impellers are balanced before assembly in accordance with company standards, and these standards require lower levels of residual unbalance than the National standards for these types of ventilators.
- Frame
- The frames for type R ventilators are made of galvanized steel angle iron bars. The cutting and bending of the frame parts, as well as the TOX connections, are formed with the use of molds to assure their high accuracy and the rigidity of the frames. The frames for type K use sections of steel to assure sufficient frame rigidity and they are finished with polyester coatings.
- SYH1120-SYH1400:The fromes a becomes by the flat steel welding, the whole spurts models, guarntees the enough intensity and the rigidity.
  ��
- Bearings
  Ball bearings are used in all of the SYH Series ventilators. They are high quality bearings and they are selected to minimize the ventilator noise levels. he bearings are pre-lubricated, sealed, and self-centering. For type R ventilators, self-aligning pillow block ball bearings are used, for type K. Z ventilators, heavy duty bearings are used, SYH series ventilators bearings are supplied with lubrication fittings.
- SYH1120-SYH1400:Out-spherial roller bearings are used SYH Series ventilators. They are high quality with low noise ventilator. The bearing are supplied with lubricatio fittings, they are pre-lubricated, sealed and self centering, for this ventilators, heavy duty bearings housings are used.
- Shaft
  The shafts are made of 40 Cr or C45 carbon steel bars. The shafts are rough machined and then stress relieved before final machining. The shaft diameters are machined to very accurate tolerance levels and they are fully checked to assure precision fits, They are coated after assembly in order to provide corrosion resistance.
  Outlet Flange
  The outlet flange is made of galvanized steel. The connections of the flange components to each other and to the scroll are made using a TOX non-welding process. This maintains a good flange appearance while also providing sufficient strength and rigidity. The outlet flange dimensions are provided in Figure 3. ��

SYH Instructions

1) In placing an order for a ventilator, it is necessary to indicate the type of ventilator required, the operating speeds, the required air flow rates, the required air discharge pressures, the direction of rotation, and the direction of the air outlet flange. The order should also indicate any requirements for fan belts, a pair of pulleys, an electric motor, a particular mounting frame, or any other parts. If an electric motor is required, then the type of electric motor and the electric motor specifications need to be indicated on the order.
2) Prior to installation, the ventilator should be carefully inspected. Special care should be taken in checking the shaft, impeller and bearings. If there is an indication of any damage, then the damaged parts should be repaired or replaced before the ventilator is installed or operated.
3) The inside of the scroll and casing need to be checked to make sure that there are no foreign objects contained therein, such as tools or loose parts.
4) The rotational directions of the motor and impeller should be checked to assure that they are consistent with each other.
5) A flexible connector should be used between the ventilator outlet flange and its mating pipe. The bolts used to fasten the outlet flange to the pipe should not be over-tightened.��
6) Following the installation, the impeller should be turned by hand or with the use of a wrench to make sure that it turns freely. Once this is verified, the ventilator can be operated normally.
7) The rated motor power as calculated herein is not sufficient to drive the ventilator with an unrestricted discharge flow path .Operating the ventilator with an unrestricted discharge flow path will result in flow rates that exceed the ventilator flow rate capabilities, and such operation will quickly burn out the motor. So care must be taken in operating the ventilators to make sure that the maximum rated flows, as provided on the performance charts in this brochure, are not exceeded.
8) This fan is restricted for use in areas where air substances are non-corrosive and non-toxics non-alkaline or where dust partides <150mg/m3,-20��<temperature<85��.If special condition sduring transportaion, load and unload, it is stricty prohibted to shock the ventilators.

ͼ3
��
��

TYPE | 200 | 225 | 250 | 280 | 315 | 355 | 400 | 450 | 500 | 560 | 630 | 710 | 800 | 900 | 1000
A | 256 | 288 | 322 | 361 | 404 | 453 | 507 | 569 | 638 | 715 | 801 | 898 | 1007 | 1130 | 1267
B | 296 | 328 | 362 | 417 | 460 | 509 | 563 | 625 | 694 | 771 | 857 | 954 | 1063 | 1186 | 1323
C | 138 | 154 | 171 | 195.5 | 217 | 241.5 | - | - | - | - | - | - | - | - | -
D | �� | �� | �� | - | - | - | - | - | - | - | - | 200 | 250 | 300 | 350
E | �� | - | - | - | - | - | 200 | 200 | 250 | 250 | 300 | 400 | 500 | 600 | 700
F |  | �� |  | - | - | - | 168.5 | 199.5 | 209 | 247.5 | 265.5 | 264 | 268.5 | 280 | 298.5

��
��
��
��

��