Carrier 50UA-UH 135 - Maintenance Details: Electrical and Coil Care; Tightening Torques for Electrical Connections; Indoor;Outdoor Coil Cleaning

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7ERECOMMENDTHATlNNED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:
Level 1
s )FTHECOILSAREFOULEDCLEANTHEMGENTLYINAVERTICAL
direction, using a brush.
s /NLYWORKONCOILSWITHTHEFANSSWITCHEDOFF
s &ORTHISTYPEOFOPERATIONSWITCHOFFTHE(6!#UNITIF
service considerations allow this.
s Clean coils guarantee optimal operation of your HVAC
unit. This cleaning is necessary when the coils begin to
become fouled. The frequency of cleaning depends on
the season and location of the HVAC unit (ventilated,
wooded, dusty area, etc.).
Level 2
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.
The two cleaning products can be used for any of the
FOLLOWINGCOILlNISHES#U#U#U!L#U!LWITH0OLUAL
"LYGOLDANDOR(ERESITEPROTECTION
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 m
2
. 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lNS4HESPRAYINGOFTHECOILMUSTBEDONE
s INTHEDIRECTIONOFTHElNS
s INTHEOPPOSITEDIRECTIONOFTHEAIRmOWDIRECTION
s WITHALARGEDIFFUSER
s ATAMINIMUMDISTANCEOF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mOWRATE4HEP(
value of the water used should be between 7 and 8.
WARNING: Never use pressurised water without a large
DIFFUSER$ONOTUSEHIGHPRESSURECLEANERSFOR#U#UAND
#U!LCOILS
#ONCENTRATEDANDORROTATINGWATERJETSARESTRICTLYFORBIDDEN
.EVERUSEAmUIDWITHATEMPERATUREABOVE#TOCLEAN
the air heat exchangers.
NOTE: Any deviation or non-observation of these mainte-
nance criteria will render the guarantee conditions for the
HVAC unit nul and void, and the manufacturer, Carrier,
will no longer be held responsible.
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Screw on disconnect switch (QS101)
ˀˀʽˀʽƖƖƖƼÁÒ½ʿƓʾʽʽƽ L1/L2/L3 15...22
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Screw PE PE 4
Tunnel terminal screw, fuse(3NP11..) FU_ 11
Tunnel terminal screw, control power
transformer
TC 2
Compressor phase&earth connection 3
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Contactor 3RT 10 1.. 0.8...1.2
Contactor 3RT 10 2.. 2...2.5
Contactor 3RT 10 3.. 3...4.5
Contactor 3RT 10 4.. 4...6
Contactor 3RT 20 1.. 0.8...1.2
Contactor 3RT 20 2..  2...2.5
ÁÊ»ÍÁÌʽ¹Ã½ÊË
Disconnect 3RV 10 1.. 0.8...1.2
Disconnect 3RV 10 2.. 2...2.5
Disconnect 3RV 10 3.. 3...4.5
Disconnect 3RV 10 4.. 4...6
Disconnect 3RV 20 1.. 0.8...1.2
Disconnect 3RV 20 2.. QF_/QM_ 2...2.5
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Thermal Relays 3RU 11 1.. 0.8...1.2
Thermal Relays 3RU 11 2.. 2...2.5
Thermal Relays 3RU 11 3.. 3...4.5
Thermal Relays 3RU 11 4.. FR_ 4...6
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Compressor bolt Compressor mounting 135-160-180 15
Compressor nut Compressor mounting 205 55
M8 nut Tandem Compressor
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135-160-180 15
M10 nut Tandem Compressor
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205 44
Oil nut 1"3/4 Oil equalization line All 100
Oil nut 2"1/4 Oil equalization line All 145
Taptite Screw M8
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M8 screw
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Metal screw Sheet metal plates All 4.2
54