28
4 UNT-PRC002-GB
Technical Data
FWD 08 12 20 30 45
Power supply (V/Ph/Hz) 230/1/50
Capacities
Cooling capacity on water (1) (kW) 5,2 8,3 15 18,8 30,1
Heating capacity on water (2) (kW) 6,3 11,9 18,9 20,9 38,2
Fan motor (type) 2 x direct drive centrifugal
Fan power input (3) (kW) 0,23 0,46 0,65 1,04 1,51
Current amps (3) (A) 1,1 2,2 3,1 4,7 5,5
Start-up amps (A) 3,2 5,5 9,3 14,1 16,5
Air flow
minimum (m
3
/h) 490 980 1400 1800 2700
nominal (m
3
/h) 820 1650 2300 3000 4500
maximum (m
3
/h) 980 1970 2600 3600 5400
Main coil
Water entering/leaving connections (type) ISO R7 rotating female
(Dia) 3/4" 3/4" 1 1/2" 1 1/2" 1 1/2"
Electric heater (accessory for blower only)
Electric power supply (V/Ph/Hz) 230/1/50 230/1/50 or 400/3/50 400/3/50 400/3/50 400/3/50
Heating capacity (kW) 2/4 8 10 12 12
Hot water coil (accessory for blower only)
Heating capacity (4) (kW) 6,3 12 17,4 22,4 34,5
G2 filter (filter box accessory)
Quantity 2 2 2 2 2
Dimensions ( LxWxth) (mm) 386x221x8 486x271x8 586x321x8 586*421*8 586*621*8
G4 filter (filter box accessory)
Quantity - 2 2 2 2
Dimensions ( LxWxth) (mm) - 486x264x48 586x314x48 586*414*48 586*614*48
Condensate pump (accessory) (type) Centrifugal
Water flow - lift height (l/h - mm) 24 - 500
Not available for FWD30 and FWD45
Sound level (L/M/H speed)
Sound pressure level (5) (dB(A)) 36/40/43 38/41/44 46/50/53 47/52/57 47/52/58
Sound power level (5) (dB(A)) 46/50/53 48/51/54 56/60/63 57/62/67 57/62/68
Unit dimensions
Width x Depth (mm) 890 x 600 1090 x 710 1290 x 820 1290 x 970 1290 x 1090
Height (mm) 250 300 350 450 650
Shipped unit dimensions
Width x Depth (mm) 933 x 644 1133 x 754 1333 x 864 1333 x 1008 1333*1133
Height (mm) 260 310 360 460 660
Weight (kg) 32 46 61 76 118
Colour galvanised steel
Recommended fuse size
Unit alone (aM/gI) (A) 8/16 8/16 8/16 8/25 8/25
Unit with electric heater (gI) (A) 16 (2kW),25 (4kW) 40 (230V),3*16 (400V) 3*20 3*25 3*25
(1) Conditions: Water entering/leaving temperature: 7/12 °C, Air inlet temperature 27/19°C DB/WB - Nominal air flow
(2) Conditions: Water entering/leaving temperature: 50/45 °C, Air inlet temperature 20°C DB - Nominal air flow
(3) At high speed with nominal air flow.
(4) Water entering/leaving temperature 90/70 °C, air inlet temperature 20 °C DB, Nominal air flow.
(5) A rectangular glass wool duct 1m50 long is placed on the blower.The measurement is taken in the room containing the blower unit.
Heat exchanger operating limits:
FWD:
*water temperature: max 100° C
*absolute service pressure: min 1 bar/max 11 bars
Accessories - Hot water coil:
*water temperature: min. +2° C/max. 100° C
*absolute service pressure: min 1 bar/max 11 bars
AH-SVX03C-GB
Duct static pressure sensor
The duct static pressure sensor should be mounted in the supply ductwork, approximately two thirds of the distance
from the fan to the end of the longest run of ductwork. The sensor requires two pairs of screened cable to the control
panel.
One pair supplies power to the device and the other is the pressure signal from the device to the controller.
Outside temperature sensor
The outside temperature sensor should be mounted on a Northfacing wall. It requires a single pair of screened wires.
The sensor can be factory mounted in the fresh air inlet. Other items are supplied loose on a project specific basis
and data sheets are available for these items.
Mains connection
Mains connections are normally made through the bottom of the control panel. All the cables should be suitably
arranged so as not to put excessive strain on the terminals. They should be fitted with suitable glands to prevent
water ingress.
Reconnection of sectionalized units
If the unit is supplied in sections, the internal control wiring will have been disconnected in the factory between
sections using break point connectors and the cables will be marked with identifiers. Site reconnection is to be done
by a contractor.
Wiring requirements
Running sensor wires in the same conduit or bundle with any AC power wires other than 24VAC may cause a
malfunction. With on site fitted items, the screened wire should be covered with insulation tape at the sensor
terminal box. Site mounted sensor cables should be Belden 8760 for 2 core devices and Belden 9402 for 4 core
cables.
Fire signal (option)
The AHU unit maybe interfaced to a fire alarm shut down by connecting a normally closed contact to the designated
terminals. If this is not required, the fire contacts are replaced by a link. Remote fireman's override switches can be
connected to allow operation of the extract fan after a fire alarm has been actuated. Where a mixing box is fitted, the
exhaust air damper will be driven to the fully open position while the mixed air and fresh air dampers are driven
closed.
Override contacts can be connected to the designated terminals where this option has been ordered.
Filter section
Depending on the order, a common or an individual filter switch is provided to indicate when the filter section
differential pressure is excessive. The filters may need to be changed.
Frost protection thermostat
In the event that the coil air on temperature drops below 5°C, a thermostat is provided to switch off the supply fan on
units with water coils. It is a hard-wired form of protection and can only be monitored by the controller. This prevents
hot water coils from freezing and would typically operate in cold weather if the hot water coil supply has failed.
Fan section
A pressure differential switch is provided across each fan to provide a proof of airflow indication. All fan / motor are
belt and pulley driven.
Frequency of inspections
It is recommended to inspect all end devices supplied with the unit for correct operation and calibration on an annual
basis.
Recommended spare parts list
If required, a list of recommended components to be kept on site can be provided.
Factory engineered controls
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