Carrier AquaSnap 61AF 022, Installation, Operation And Maintenance Instructions

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15 - STANDARD MAINTENANCE
15.4 - Tightening torques for the main electrical
screw connections
Screw type
Designation
in the unit
Torque (N∙m)
Soldered screw (PE) customer connection
M8 PE 80
Screw on switch inlet zones
Switch 3LD2114-0TK51 QS_ 2-2,5
Switch 3LD2214-0TK51 2-2,5
Switch 3LD2514-0TK51 2,5-3
Switch 3LD2714-0TK51 2,5-3
Tunnel terminal screw, compressor protection
Fuse 3NW6120-1 QM
(1)
1.2
Tunnel terminal screw, compressor contactor
Contacteur 3RT1034-2AB00 KM
(1)
3-4,5
Tunnel terminal screw, fan, heater, pump protection
Disconnect switch 3RV1011-1BA10 QM
(1)
0,8-1,2
Tunnel terminal screw, heater relay
Relay 3RH1122-2AB00 KM
(1)
0,8-1,2
Tunnel terminal screw, auxiliary contact
Auxiliary terminal block 3RH1911-2FA11 - 0,8-1,2
Auxiliary terminal block 3RH1921-2FA22
Tunnel terminal screw, control power transformer
Transformer 4AM3496-0FS30-0EN1 TC 0,8-1,2
Compressor earth terminal
M8 Gnd 12
(1) The spring-loaded terminal connections are designed to ensure permanent
affixture on the conductor.
15.5 - Tightening torques for the main bolts and
screws
Screw type Used for Torque (N∙m)
Compressor Compressor support 30
M8 nut BPHE
(1)
fixing 15
M10 nut Compressor mounting 30
M16 nut Compressor fixing 30
Oil nut Oil equalisation line 75
Taptite screw
M6
Fan support 7
Taptite screw
M8
Fan motor fixing 13
H M8 screw Fan scroll fixing 18
Metal screw Sheet metal plates 4.2
H M6 screw Stauff clamps 10
Earth screw Compressor 2.8
(1) BPHE = Brazed plate heat exchanger
15.6 - Evaporator coil
We recommend, that finned coils are inspected regularly to check
the degree of fouling. This depends on the environment where the
unit is installed, and will be worse in urban and industrial
installations and near trees that shed their leaves.
For coil cleaning, two maintenance levels are used, based on the
AFNOR X60-010 standard:
Level 1
-
If the evaporator coils are fouled, clean them gently in a
vertical direction, using a brush.
-
Only work on air evaporators with the fans switched off.
-
For this type of operation switch off the heat pump if service
considerations allow this.
-
Clean evaporators guarantee optimal operation of your unit.
Cleaning is necessary when the evaporators begin to become
fouled. The frequency of cleaning depends on the season
and location of the unit (venti-lated, wooded, dusty area, etc.).
Level 2
The two cleaning products can be used for any Cu/Al coil with
protection.
Clean the coil, using appropriate products.
We recommend TOTALINE products for coil cleaning:
Part No. P902 DT 05EE: traditional cleaning method
Part No. P902 CL 05EE: cleaning and degreasing.
These products have a neutral pH value, do not contain
phosphates, are not harmful to the human body, and can be
disposed of through the public drainage system.
Depending on the degree of fouling both products can be used
diluted or undiluted. For normal maintenance routines we
recommend using 1 kg of the concentrated product, diluted to
10%, to treat a coil surface of 2 m2. This process can either be
carried out using a high-pressure spray gun in the low-pressure
position.
With pressurised cleaning methods care should be taken not to
damage the coil fins. The spraying of the coil must be done:
-
in the direction of the fins
-
in the opposite direction of the air flow direction
-
with a large diffuser (25-30°)
-
at a minimum distance of 300 mm from the coil.
It is not necessary to rinse the coil, as the products used are pH
neutral. To ensure that the coil is perfectly clean, we recommend
rinsing with a low water flow rate. The pH value of the water used
should be between 7 and 8.
WARNING: Never use pressurised water without a large
diffuser. Do not use high-pressure cleaners for Cu/Al coils.
Concentrated and/or rotating water jets are strictly forbidden.
Never use a fluid with a temperature above 45°C to clean the
air heat exchangers.
Correct and frequent cleaning (approximately every three
months) will prevent 2/3 of the corrosion problems. Protect
the control box during cleaning operations.
15.7 - Condenser maintenance
Check that:
-
que la mousse isolante est intacte et bien en place. the
insulating foam is intact and securely in place.
-
the cooler heaters are operating, secure and correctly
positioned.
-
the water-side connections are clean and show no sign of
leakage.