Condenser Coils Mche Maintenance; Heat Exchanger Operating Limits; Fwd - Trane GVAF Series Installation Operation & Maintenance

Condenser Coils MCHE Maintenance

Cleaning Procedures
It is mandatory to clean regularly the coils for a proper unit
operation. Eliminate pollution and other residual material
help to extend the life of the coils and the unit.

FWD

Power supply
CAUTION! Equipment Damage! Do not use coil cleaning
Capacities
agents to clean uncoated GVAF coils. Use clean water only.
Cooling capacity on water (1)
Use of coil cleaning agents on uncoated GVAF coils could
Heating capacity on water (2)
Fan motor
cause damage to coils.
Fan power input (3)
Current amps (3)
Regular coil maintenance, including frequent cleaning-
Start-up amps
enhances the unit's operating efficiency by minimizing
Air flow
compressor head pressure and amperage draw. The minimum
nominal
condenser coil (non-coated and e-coated) should be cleaned
maximum
at least once each quarter or more if the unit is located in a
Main coil
"dirty" or corrosive environment. Cleaning with cleansers or
Water entering/leaving connections
detergents is strongly discouraged due to the all-aluminum
Electric heater (accessory for blower only)
construction; straight water should prove sufficient. Any
Electric power supply
breach in the tubes can result in refrigerant leaks.
Heating capacity
Hot water coil (accessory for blower only)
Important: Only in extreme cases should any type of
Heating capacity (4)
chemical cleaner or detergent be used on micro channel
G2 filter (filter box accessory)
Quantity
coils. If it becomes absolutely necessary because water
Dimensions ( LxWxth)
alone did not clean the coil, specify a cleaner that is:
G4 filter (filter box accessory)
• A is pH neutral cleaner.
Quantity
• An alkaline cleaner that is no higher than 8 on
Dimensions ( LxWxth)
the pH scale.
Condensate pump (accessory)
Water flow - lift height
• An acidic cleaner that is no lower than 6 on the pH
Not available for FWD30 and FWD45
scale.
Sound level (L/M/H speed)
• Does not contain any hydrofluoric acids.
Sound pressure level (5)
Sound power level (5)
Unit dimensions
Be sure to follow the instructions provided with any cleaner
Width x Depth
chosen. Keep in mind that it is still MANDATORY that the
Height
coils are thoroughly rinsed with water after the application
Shipped unit dimensions
of the cleaner even if the instructions specify a "No Rinse"
Width x Depth
cleaner. Cleaners or detergents that are left on the coil due
Height
Weight
to improper rinsing will significantly increase the possibility
Colour
of corrosion damage on the micro channel coil.
Recommended fuse size
Unit alone (aM/gI)
Note: Quarterly cleaning (or more for harsh environment)
Unit with electric heater (gI)
is essential to extend the life of a MCHE coil and is required
(1) Conditions: Water entering/leaving temperature: 7/12 °C, Air inlet temperature 27/19°C DB/WB - Nominal air flow
to maintain warranty coverage. Failure to clean a MCHE coil
(2) Conditions: Water entering/leaving temperature: 50/45 °C, Air inlet temperature 20°C DB - Nominal air flow
will void the warranty and may result in reduced efficiency
(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.
and durability in the environment.
(5) A rectangular glass wool duct 1m50 long is placed on the blower.The measurement is taken in the room containing the blower unit.
WARNING! Hazardous Voltage! Disconnect all electric

Heat exchanger operating limits:

FWD:
power, including remote disconnects before servicing.
*water temperature: max 100° C
Follow proper lockout/ tagout procedures to ensure the
*absolute service pressure: min 1 bar/max 11 bars
power cannot be inadvertently energized. Failure to
Accessories - Hot water coil:
disconnect power before servicing could result in death or
*water temperature: min. +2° C/max. 100° C
*absolute service pressure: min 1 bar/max 11 bars
serious injury.
1. Disconnect Power to the unit.
2. Wear proper personal protection equipment such as a
face shield, gloves and waterproof clothing.
3. Remove enough panels from the unit to gain safe
access to the micro channel coil.
4 52
Technical Data
Note: It is better to clean the coil from the opposite direction
of normal air flow (inside of unit out) because this allows
the debris to be pushed out rather than forced further into
the coil.
08
(V/Ph/Hz)
(kW) 5,2
Note: Remove solid residue is essential to preserve
(kW) 6,3
(type)
performance of the coil and avoid corrosion over the length
(kW) 0,23
of the product life.
(A) 1,1
(A) 3,2
(m /h) 490
3
(m /h) 820
3
(m /h) 980
3
(type)
(Dia) 3/4"
(V/Ph/Hz) 230/1/50
(kW) 2/4
(kW) 6,3
2
Figure 23 – Sprayer source angle
(mm) 386x221x8
-
(mm) -
(type)
(l/h - mm)
(dB(A)) 36/40/43
(dB(A)) 46/50/53
(mm) 890 x 600
(mm) 250
(mm) 933 x 644
(mm) 260
(kg) 32
To avoid damage from the spray wand contacting the coil,
make sure the 90º attachment does not come in contact with
(A) 8/16
the tube and fin as abrasion to the coil could result.
(A) 16 (2kW),25 (4kW)
Maintenance of Flanges Connection
It is mandatory to apply marine grease all around the coil
flange connections to the piping on a regular basis (for
instance twice a year) to avoid traps of moisture and dirt in
the gasket recess.
Repair / Replacement of Micro
channel Coil
Micro channel coils are considerably more robust in design
than tube and fin condenser coils, however they are not
indestructible. When damage or a leak occurs in the field, it
is possible to temporarily repair the coil until another coil
can be ordered.
If the leak is found to be within the tube area of the coil,
a field repair kit (KIT16112) is available through your local
Trane parts center. Because of the all-aluminum construction
and aluminum's high thermal expansion rate, a leak located
at or on the header assembly cannot be repaired.
12
1. Use a soft brush or vacuum to remove base debris or
230/1/50
surface loaded fibers from both sides of the coil.
8,3
11,9
2 x direct drive centrifugal
0,46
2,2
5,5
2. Using a sprayer and water ONLY, clean the coil
980 1400
following the guidelines below.
1650 2300
a. Sprayer nozzle pressure should not exceed 40 bars.
1970 2600
b. The maximum source angle should not exceed
25 degrees (Figure 22) to the face of the coil. For
ISO R7 rotating female
best results spray the micro channel perpendicular
3/4" 1 1/2"
to face of the coil.
230/1/50 or 400/3/50 400/3/50
c. Spray nozzle should be approximately 5 to 10 cm
8
from the coil surface.
d. Use at least a 15º fan type of spray nozzle.
12
2
486x271x8 586x321x8
2
486x264x48 586x314x48
Centrifugal
24 - 500
38/41/44 46/50/53
48/51/54 56/60/63
1090 x 710 1290 x 820
300
1133 x 754 1333 x 864
310
46
galvanised steel
8/16
40 (230V),3*16 (400V) 3*20
20 30
15 18,8 30,1
18,9 20,9 38,2
0,65 1,04 1,51
3,1 4,7
9,3 14,1 16,5
1800 2700
3000 4500
3600 5400
1 1/2" 1 1/2"
400/3/50 400/3/50
10 12
17,4 22,4 34,5
2 2
586*421*8 586*621*8
2 2
586*414*48 586*614*48
47/52/57 47/52/58
57/62/67 57/62/68
1290 x 970 1290 x 1090
350 450
1333 x 1008 1333*1133
360 460
61 76
8/16 8/25 8/25
3*25 3*25
CTV-SVX009D-GB UNT-PRC002-GB
45
5,5
12
2
2
650
660
118