Operating Conditions; Product Description; Design; Specification - Woods SMHA-031 Installation And Maintenance Instructions Manual

4. OPERATING CONDITIONS

Under emergency conditions, these fans are suitable for the temperature/time capability stated on their name plate or in
accompanying documentation. e.g. "HT300/2" or "Ff300 (120)" denotes that a fan is suitable for a single use at an emergency
condition of 300°C for 2 hours (120 minutes). If the emergency air temperature exceeds 400°C, a means of ducting hot
air away from the motor compartment to a safe location must be provided. In addition, a means must also be provided
to force ventilate the motor compartment, in order to supply cooling air which is at less than 40°C. Motor cooling fan and
associated ductwork shall be provided by others.

5. PRODUCT DESCRIPTION

5.1 DESIGN

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Between the hatch and casing is sealing material.
Both the hatch and casing have isolation material between metal sheets which makes them thermally insulated.

5.2 SPECIFICATION

The SMHA HATCH product is a mechanical smoke exhaust unit which is designed to be roof mounted. The
equipment is an axial fan with casing designed for the use as an exhaust fan in high temperature emergency
conditions. The product is not designed to be used for normal ventilation.
Our SMHA HATCH product has two JMHT fan temperature variants available: Ff300 (300°C) or F400 (400°C),
both capable of extracting hot smoke for a duration of 120 minutes, as tested and certified in accordance with
EN 12101-3:2015. These product variants are designed for a smoke exhaust duty only. The core range uses IE2
efficiency grade motors, but IE3 will be available soon. The hatch and fan are integrated to be one certified unit.
The hatch or lid fitted to the top our SMHA unit has been tested to open under a snow load condition of SL 500
(tested in accordance with EN 12101-2). The fan itself should be started 30 seconds after the hatch motors have
been started.
The door is also equipped with a mechanical cable opening mechanism. The mechanism is intended for situations
where it is desired to open the door without electricity.
The standard direction of the smoke exhaust is upwards.
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1. Opening Hatch
2. JMHT fan and fire rated motor
3. Safety Mesh
4. Mechanical cable opening opening mechanism
5. Linear motor
6. Limit switch
7. Safety switches
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SPECIFICATION OVERVIEW
Product SMHA, Hatch fan
Fan Type HT JM axial fan
Fire Resistance Class Ff300 / F400 for 120 mins
Certifying Body Eurofins / BSI
Certificate No 0809-CPR-19001010 / 2797-CPR-474778
Motor efficiency Grade Standard: IE2, with IE3 as an option

5.3 CABLE

Suitable fire-resistant cable must be used between the main supply, starter controls and the fan. The mains
supply must be from a guaranteed or separately maintained source, to enable the fan to continue running under
emergency conditions. Duct-mounted terminal boxes for all HT fan specifications are designed to accommodate
MICC supply cables.

5.4 DIMENSIONS

I
A B
20 D
C
Diameter
of fan
E (internal) F (internal)
G
H
Fan Fan
A B C D E F G
Code Diameter
031 315 1065 1165 1010 315 800 900 980
040 400 1065 1165 1010 400 800 900 980
050 500 1065 1165 1010 500 800 900 980
080 800 1265 1365 1010 800 1000 1100 1180 1280 1445 1335 2135
090 900 1465 1565 1010 900 1200 1300 1380 1480 1645 1535 2335
100 1000 1465 1565 1010 1000 1200 1300 1380 1480 1645 1535 2335
125 1250 1715 1815 1210 1250 1450 1550 1630 1730 1895 1785 2785 1100
All dimensions are in mm except weight and fan code.
* Complete Weight includes SMHA casing with fan fitted (with maximum size fan motor).
J
90°
K
L
M
Total
H I J K L M Weight
(KG)*
1080 1245 1135 1935 900 375 192
1080 1245 1135 1935 900 375 192
1080 1245 1135 1935 900 375 230
900 375 353
900 375 389
900 375 540
575 730
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