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
CG-SVX051A-GB
56
Unit Start Up Procedures
Daily Unit Start Up
The timeline for the sequence of operation begins with
a power-up of the main power to the unit. The sequence
assumes 2 circuits, 2 compressors, Sintesis air cooled
CMAF Multi-Pipe unit with no diagnostics
or malfunctioning components. External events such
as the operator placing the unit in AUTO or STOP,
chilled/hot water flow through the water exchangers,
and application of load to the water loop causing loop
water-temperature increases, are depicted and the unit
responses to those events are shown, with appropriate
delays noted. The effects of diagnostics, and other
external interlocks other than water flow proving, are not
considered.
Note:
unless the Tracer Symbio™ 800 and building
automation system are controlling the chilled-water
pump, the manual unit start sequence is as follows.
Operator actions are noted.
General
If the present checkout, as discussed above, has been
completed, the unit is ready to start.
1. Press the STOP key on the TD7 display.
2. As necessary, adjust the set point values on the TD7
menus using Tracer™ TU.
3. Close the fused-disconnect switch for the chilled-
water pump. Energize the pump(s) to start water
circulation
4. Check the service valves on the discharge line,
suction line, oil line, and liquid line for each circuit.
These valves must be open (back seated) before
starting the compressors.
5. Verify that chilled-water pump runs for at least one
minute after the unit is commanded to stop (for
normal chilled-water systems).
6. Press the AUTO key. If the unit control calls for
cooling / heating, and all safety interlocks are closed,
the unit will start. The compressor(s) will load and
unload in response to the leaving water temperature.
After the system has been operating for approximately
30 minutes and has become stabilized, complete the
remaining start up procedures, as follows:
1. Check the suction, discharge and liquid refrigerant
pressures under Refrigerant Report on the TD7.
Check the EXV sight glasses after enough time has
elapsed to stabilize the unit. The refrigerant flow
through the sight glasses should be clear. Bubbles in
the refrigerant indicate either low refrigerant charge
or excessive pressure drop in the liquid line, or an
expansion valve that is stuck open. A restriction in
the line can sometimes be identified by a noticeable
temperature differential between the two sides of the
restriction. Frost will often form on the line at this point.
Proper refrigerant charges are shown in the General
Information Section.
Seasonal Unit Startup Procedure
1. Close all valves and reinstall the drain plugs in the
Chilled/Hot Water Exchangers.
2. Service the auxiliary equipment according to the
startup and maintenance instructions provided by
the respective equipment manufacturers.
3. Close the vents in chilled / hot water water circuits.
4. Open all the valves in the chilled / hot water circuits.
5. Open all refrigerant valves.
6. If the water exchangers were previously drained,
vent and fill chilled / hot water circuits. When all air
is removed from the system (including each pass),
install the vent plugs on water pipes.
7. Check the adjustment and operation of each safety
and operating control.
8. Close all disconnect switches.
9. Refer to the sequence for daily unit start up for the
remainder of the seasonal start up.
10. Clean up the flow switches and adjust their setting if
necessary. Care to orrient them them to face up the
water flow correctly.
11. Check proper functionning of isolation valves. Make
sure nuts between valve and actuator are still tighted
enough (40 N.m)
CAUTION!
Ensure that the compressor and heaters
have been operating for a minimum of 24 hours before
starting. Failure to do so may result in equipment
damage
System Restart after Extended
Shutdown
1. Verify that the liquid-line service valves, compressor
discharge service valves, and optional suction
service valves are open (back seated).
2. Check the oil level (see Maintenance procedures
section).
3. Fill the chilled/hot water circuits. Vent the system
while it is being filled. Open the vent on the top of
the chilled/hot water exchanger while filling, and
close it when filling is completed.
4. Close the fused-disconnect switches that provide
power to water pumps.
5. Start water pumps and, while water is circulating,
inspect all piping for leakage. Make any necessary
repairs before starting the unit.
6. While the water is circulating, adjust the water flow
and check the water pressure drops through the
chilled/hot water exchanger. Refer to “water-system
flow rates” and “water-system pressure drop”.
7. Clean up the flow switches and adjust their setting if
necessary. Care to orrient them them to face up the
water flow correctly.
8. Stop the water pumps. The unit is now ready for
startup as described “Startup procedures”.
CAUTION!
To prevent damage to the compressor,
ensure that all manual refrigerant valves are open before
starting the unit. Do not use untreated or improperly
treated water. Equipment damage may occur.
