Airwell HRW 120 [12/42] The unit sizes 096 to 120 can be supplied configured for either frontal air blowing known as in line or for side air blowing known as rear it is also possible to modify the air...

Airwell HRW 120 [12/42] The unit sizes 096 to 120 can be supplied configured for either frontal air blowing known as in line or for side air blowing known as rear it is also possible to modify the air blowing configuration on site to achieve this
10
MODIFYING THE AIR BLOWING DIRECTION
The unit sizes 096 to 120 can be supplied configured for either frontal air
blowing, known as "IN LINE", or for side air blowing, known as "REAR". It is also
possible to modify the air-blowing configuration on site. To achieve this:
1 - Remove the top panel 1.
2 - Remove the fan motor access panel 2 and release a small length
of motor cable.
3 - Remove the fan blower panel
3.
4- Fit the fan blower panel
3 in the same location as the access
panel 2.
4 - Refit the fan access panel 2.
5 - Refit the top panel 1.
FILTER ACCESS
Each unit is supplied with a connection frame also serving as the filter
support. This enables to filter to be removed from the side without having
to dismantle the duct or the connection frame.
VENTILATION
An outdoor air intake (new air) may be required for ventilation. The blown air temperature must be controlled in
order to avoid the temperature of the mixture of outdoor air and return air at the heat pump inlet exceeding the
appliance’s operating limits. It is also common practice to shut down ventilation during periods of inoccupation
(night time setting of the set temperature).
Each appliance’s ventilation system is generally a sub-system within the building, with its own distribution duct
network. The simple introduction of outdoor air into each return air plenum, quite close to the unit’s return air
intake is sufficient and recommended. New air should not be introduced directly into the appliance. Provide for a
sufficient distance to ensure effective mixing of the outdoor air with the return air. (Refer to "Operating limits").
EXTERNAL STATIC PRESSURE AVAILABLE
1
3
2
MODELS Speed
External Static Pressure (Pa)
0 25 50 75 100 125 150 175 200 225 250 275 300
96
0 turn
6000 5778 5544 5300 5010 4678 4250 3578
1 turn
5645 5428 5178 4910 4578 4156 3400
2 turn
5360 5122 4850 4533 4144 3555
3 turn
5025 4778 4483 4133 3639
120
0 turn
8700 8440 8120 7800 7480 7150 6800 6410 6000 5600 5100 4580 4000
1 turn
8400 8085 7740 7400 7020 6640 6230 5800 5340 4840 4310 3680 2950
2 turn
7960 7650 7310 6960 6580 6160 5730 5240 4670 4010 3120
31/2 turn
7420 7070 6700 6300 5870 5410 4910 4340 3650 2800
The flow / static pressure adjustment is made with the aid of a variable pulley. When adjusting this pulley, it is
important to ensure that the belt is positioned properly. The pulleys / belt assembly must be aligned perfectly and
the belt tensioned in accordance with best practices.

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