Thermo King V220 Series User manual

Revision B
September 2018 TTKK 5566334422--1188--MMMM--EENN
Truck Edition
V-220/V-320 Series
Maintenance Manual

©2020 Trane Technologie TK 56342-18-MM-EN
Introduction
Thi manual i publi hed for informational purpo e
only. Thermo King® make no repre entation
warrantie expre or implied, with re pect to the
information recommendation and de cription
contained herein. Information provided hould not be
regarded a all-inclu ive or covering all contingencie .
If further information i required, Thermo King
Corporation Service Department hould be con ulted.
TThheerrmmoo KKiinngg’’ wwaarrrraannttyy hhaallll nnoott aappppllyy ttoo aannyy
eeqquuiippmmeenntt wwhhiicchh hhaa bbeeeenn ““ oo iinn ttaalllleedd,,
mmaaiinnttaaiinneedd,, rreeppaaiirreedd oorr aalltteerreedd aa ,, iinn tthhee
mmaannuuffaaccttuurreerr’’ jjuuddggmmeenntt,, ttoo aaffffeecctt iitt iinntteeggrriittyy..””
MMaannuuffaaccttuurreerr sshhaallll hhaavvee nnoo lliiaabbiilliittyy ttoo aannyy ppeerrssoonn
oorr eennttiittyy ffoorr aannyy ppeerrssoonnaall iinnjjuurryy,, pprrooppeerrttyy ddaammaaggee
oorr aannyy ootthheerr ddiirreecctt,, iinnddiirreecctt,, ssppeecciiaall,, oorr
ccoonnsseeqquueennttiiaall ddaammaaggeess wwhhaattssooeevveerr,, aarriissiinngg oouutt ooff
tthhee uussee ooff tthhiiss mmaannuuaall oorr aannyy iinnffoorrmmaattiioonn,,
rreeccoommmmeennddaattiioonnss oorr ddeessccrriippttiioonnss ccoonnttaaiinneedd
hheerreeiinn.. TThhee pprroocceedduurreess ddeessccrriibbeedd hheerreeiinn sshhoouulldd
oonnllyy bbee uunnddeerrttaakkeenn bbyy ssuuiittaabbllyy qquuaalliiffiieedd ppeerrssoonnnneell..
FFaaiilluurree ttoo iimmpplleemmeenntt tthheessee pprroocceedduurreess ccoorrrreeccttllyy
mmaayy ccaauussee ddaammaaggee ttoo tthhee TThheerrmmoo KKiinngg uunniitt oorr
ootthheerr pprrooppeerrttyy oorr ppeerrssoonnaall iinnjjuurryy..
Revision History
Revision A (06/17) Original release
Revision B (12/17) Update condenser fan fuse (F30) to 20 amps, expansion valve feeler bulb location, and other general updates.
General Infor ation
The maintenance information in this manual covers unit models:
V–220 10 (903495) V–320 10 (903497)
V–220 20 (903496) V–320 20 (903498)
V–220 MAX 10 (903491) V–320 MAX 10 (903493)
V–220 MAX 20 (903492) V–320 MAX 20 (903494)
V–320 MAX 30 (903677)
V–320 MAX 50 (903678)
For further information, refer to:
V-220/V-320 Series Vehicle Powered Truck Units Operator’s Manual TK 56322
V-220 Series Parts Manual TK 56428
V-320 Series Parts Manual TK 56429
Direct Smart Reefer III Microprocessor Control System Diagnostic Manual TK 61096
V-220/V-320 Series Diagrams Manual TK 56454
V-220/V-320 Installation Manual TK 56321
V-220/V-320 Heat Kit Installation Manual TK 56340
Vehicle Powered Truck Installation Standards and Procedures TK 56430
Diagnosing Thermo King Truck and Trailer Refrigeration Systems TK 5984
Tool Catalog TK 5955
Evacuation Station Operation and Field Application TK 40612
The information in this manual is provided to assist owners, operators and service people in the proper upkeep and maintenance of Thermo
King units.

TK 56342-18-MM-EN 3
Recover Refrigerant
NNoottee In the USA, EPA Section 608 Certification is
required to work on refrigeration systems. In the
EU, local F-gas Regulations must be observed
when working on refrigeration systems.
At Thermo King®, we recognize the need to pre erve
the environment and limit the potential harm to the
ozone layer that can re ult from allowing refrigerant to
e cape into the atmo phere.
We trictly adhere to a policy that promote the
recovery and limit the lo of refrigerant into the
atmo phere.
When working on tran port temperature control
y tem , a recovery proce that prevent or minimize
refrigerant lo to the atmo phere i required by law. In
addition, ervice per onnel mu t be aware of the
appropriate European Union, National, Federal, State,
and/or Local regulation governing the u e of
refrigerant and certification of technician . For
additional information on regulation and technician
program , contact your local THERMO KING dealer.
SSeerrvviiccee TTooooll - U e the proper ervice tool . Gauge
manifold et hould include appropriate hutoff
valve or di connect near the end of each ervice line.
RReeccoovveerryy EEqquuiippmmeenntt - Recovery equipment mu t be
u ed. Proper recovering, toring and recycling of
refrigerant i an important part of all ervice work.
SSeerrvviiccee PPrroocceedduurree - Recommended procedure mu t
be u ed to minimize refrigerant lo .
CCoommppoonneenntt mmaayy bbee ii oollaatteedd by clo ing ervice
valve and performing y tem pump-down .
CCoommppoonneenntt uunnaabbllee ttoo bbee ii oollaatteedd for ervice mu t
be repaired only after refrigerant i properly recovered.
R-134a/R-404A
R-134aR-404A
NNOOTTIICCEE
EEqquuiippmmeenntt DDaammaaggee!!
UU ee oonnllyy PPoollyyoollee tteerr--bbaa eedd rreeffrriiggeerraattiioonn
ccoommpprree oorr ooiill iinn RR--113344aa//RR--440044AA yy tteemm .. SSeeee
TThheerrmmoo KKiinngg PPaarrtt MMaannuuaall ffoorr ppaarrtt nnuummbbeerr..
NNOOTTIICCEE
SSyy tteemm CCoonnttaammiinnaattiioonn!!
DDoo nnoott mmiixx PPoollyyoollee tteerr aanndd ttaannddaarrdd yynntthheettiicc
ccoommpprree oorr ooiill .. KKeeeepp PPoollyyoollee tteerr ccoommpprree oorr ooiill
iinn ttiigghhttllyy eeaalleedd ccoonnttaaiinneerr .. IIff PPoollyyoollee tteerr ooiill
bbeeccoommee ccoonnttaammiinnaatteedd wwiitthh mmooii ttuurree oorr ttaannddaarrdd
ooiill ,, ddii ppoo ee ooff pprrooppeerrllyy––DDOO NNOOTT UUSSEE..
NNOOTTIICCEE
SSyy tteemm CCoonnttaammiinnaattiioonn!!
WWhheenn eerrvviicciinngg TThheerrmmoo KKiinngg RR--113344aa oorr RR--440044AA
uunniitt ,, uu ee oonnllyy tthhoo ee eerrvviiccee ttooooll cceerrttiiffiieedd ffoorr aanndd
ddeeddiiccaatteedd ttoo RR--113344aa//RR--440044AA rreeffrriiggeerraanntt aanndd
PPoollyyoollee tteerr ccoommpprree oorr ooiill .. RRee iidduuaall nnoonn--HHFFCC
rreeffrriiggeerraanntt oorr ooiill wwiillll ccoonnttaammiinnaattee RR--113344aa//RR--
440044AA yy tteemm ..
IInnttrroodduuccttiioonn

4TK 56342-18-MM-EN
About This Manual
Purpose
The purpo e of thi manual i to provide general
maintenance information nece ary to maintain the
climate control unit at peak operating tandard . Thi
include afety information, unit information uch a
bill of material and kit number , general unit
information, maintenance procedure and related
information ( uch a wiring and chematic diagram ),
and ome diagno tic and trouble hooting information.
NNoottee This manual may cover more than one unit.
Therefore, it may contain information not
applicable to your unit.
Contents
Thi manual i organized into the following chapter :
Chapter Purpose
Safety Precautions Provides detailed safety information. You should be familiar with the safety
precautions before working on any unit.
Model Systems (Systems Designations) Table This table lists the bills of material and kit options that make up your unit.
Use them for the following purposes:
1. To determine if you have the right manual for your unit: the bill of
material (B/M) number on your unit serial plate should match one of
the bill of material numbers listed in this section. If you cannot find
your unit in the matrix, call TK Service for more information.
2. To communicate with TK Service Department: If you need to call TK
Service, you must know your model number(s) in order for the service
representative to help you.
Specifications Lists unit specifications.
Unit Description Gives an overview description of your unit including standard and optional
features, illustrations, and general a/c theory.
Maintenance Inspection Schedule Table of routine maintenance procedures.
Maintenance Chapters Provide detailed maintenance procedures required for your unit. (Electrical,
Refrigeration, Compressor, Clutch, Structural)
Diagnosis Chapters Provides troubleshooting information for diagnosing problems.
Diagrams Wiring, Schematic and Refrigeration diagrams applicable to the unit.
Before you Call Ther o King Service!
Who to call: Your Thermo King Service Repre entative.
Before you call Thermo King Service, have the
following information on hand:
• Bill of Material (u ually located on the unit erial
plate)
• Model Number - found on ide of the unit
Blank Pages
Thi manual may contain blank page at the end of
chapter . Thi i normal. There i no information
mi ing from the manual.
Roadside/Curbside Ter inology
Road ide/Curb ide terminology: The e term can be
confu ing becau e of difference between North
America and Europe. Plea e note:
Curbside: The side of the truck to the driver’s right when the
driver is in his seat and facing forward.
Roadside: The side of the truck to the driver’s left when the
driver is in his seat and facing forward.
Using the Model Syste s Tables in
“Model Syste s (Syste Designations)”
The Model Sy tem Table in thi ection li t important
unit information that you will need to communicate
with the Thermo King Service Department.
IInnttrroodduuccttiioonn

TK 56342-18-MM-EN 5
Custo er Satisfaction Survey
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Scan the Quick Re pon e (QR) code or click or type the
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IInnttrroodduuccttiioonn

6TK 56342-18-MM-EN
SSaaffeettyy PPrreeccaauuttiioonn .. .. .... .. .... .......... .... .... .... .. .... .. .. 1100
Danger, Warning, Caution, and
Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
General Practice . . . . . . . . . . . . . . . . . . . . . . . . 10
Auto Start/Stop . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Battery In tallation and Cable
Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Refrigerant Hazard . . . . . . . . . . . . . . . . . . . . . . 11
Refrigerant Oil Hazard . . . . . . . . . . . . . . . . . . . 12
Electrical Hazard . . . . . . . . . . . . . . . . . . . . . . . . 12
High Voltage. . . . . . . . . . . . . . . . . . . . . . . . . 12
Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . 13
Microproce or Service Precaution . . . . . . 13
Welding Precaution . . . . . . . . . . . . . . . . . . . . . 13
Fir t Aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
MMooddeell SSyy tteemm ((SSyy tteemm
DDee iiggnnaattiioonn )) .. .. .... .. .... .... .. .... .... .. .... .. .... .... ............ 1155
SSppeecciiffiiccaattiioonn .. .. .... .... .... .. .... .. .... .... .. .... .............. .... 1166
Electrical Sy tem . . . . . . . . . . . . . . . . . . . . . . . . 16
Refrigeration Sy tem . . . . . . . . . . . . . . . . . . . . 17
Compre or . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
AC Electric Compre or Motor and
Overload Relay . . . . . . . . . . . . . . . . . . . . . . . . . 18
Contactor . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Tran former . . . . . . . . . . . . . . . . . . . . . . . . . 19
Start Relay (SR) . . . . . . . . . . . . . . . . . . . . . . 19
Electric Standby Power Supply
Requirement . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Optional Electric Heater . . . . . . . . . . . . . . . . . 20
Belt Ten ion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Solder Application . . . . . . . . . . . . . . . . . . . . . . 20
UUnniitt DDee ccrriippttiioonn.. .... .... .............. .... .. .... .... .......... .... 2211
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Conden er . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Compre or . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Control Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . 21
DSR Control Sy tem . . . . . . . . . . . . . . . . . . . . . 21
Oil Separator . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Liquid Injection Sy tem . . . . . . . . . . . . . . . . . . 21
Evaporator Drain Line Heater . . . . . . . . . . . . 22
Electric Standby Operation . . . . . . . . . . . . . . . 22
Unit Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Standard Feature . . . . . . . . . . . . . . . . . . . 22
Optional Feature . . . . . . . . . . . . . . . . . . . . 22
Protection Feature . . . . . . . . . . . . . . . . . . . . . . 22
Control Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
P.C. Board . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Electronic Control Module
(ECM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Refrigeration Sy tem Component . . . . . . . . 23
Solenoid and Valve . . . . . . . . . . . . . . . . 23
Hot Ga Solenoid (HGS) . . . . . . . . . . . . . . 23
Conden er Inlet Solenoid (CIS). . . . . . . . . 23
Suction Pre ure Regulator Valve
(SPR).............................. 23
Liquid Line Check Valve. . . . . . . . . . . . . . . 23
Switche and Tran ducer . . . . . . . . . . . . 23
Low Pre ure Cutout Switch
(LPCO)............................. 23
Liquid Injection Switch (LISW) . . . . . . . . . 23
Di charge Pre ure Tran ducer
(DPT).............................. 23
Unit Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
CoolMode ......................... 24
NullMode.......................... 31
Purge Mode – Model 30 and Model 50
Unit Only.......................... 31
Heat Mode – Model 30 and Model 50
Unit Only.......................... 31
Defro t Mode . . . . . . . . . . . . . . . . . . . . . . . 35
Serial Number Location . . . . . . . . . . . . . . . . . 38
Unit Component . . . . . . . . . . . . . . . . . . . . . . . . 38
MMaaiinntteennaannccee IInn ppeeccttiioonn
SScchheedduullee .. .... .. .... .... .......... .... .... .. .... .... .. .... .. .... .... ...... 4411
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Refrigeration/Heating . . . . . . . . . . . . . . . . . . . . 41
Structural . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table of Contents

TK 56342-18-MM-EN 7
EElleeccttrriiccaall MMaaiinntteennaannccee .. .. .... .... .. .... .......... .... .... 4422
Maintenance In pection Schedule. . . . . . . . . 42
Electronic Control Sy tem . . . . . . . . . . . . . . . . 42
Defro t Sy tem . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Defro t Termination Switch . . . . . . . . . . . . . . 42
Defro t Termination Switch
Replacement . . . . . . . . . . . . . . . . . . . . . . . . 43
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
In tallation . . . . . . . . . . . . . . . . . . . . . . . . . 43
Liquid Injection Sy tem (R-404A Unit
Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Te ting Liquid Injection Solenoid
Valve and Metering Orifice. . . . . . . . . . . . 43
Te ting Liquid Injection Switch
(LISW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Liquid Injection Switch (LISW)
Replacement . . . . . . . . . . . . . . . . . . . . . . . . 43
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
In tallation . . . . . . . . . . . . . . . . . . . . . . . . . 43
Conden er Fan Motor . . . . . . . . . . . . . . . . . . . . 44
Conden er Fan Motor Removal and
In tallation . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
In tallation . . . . . . . . . . . . . . . . . . . . . . . . . 44
Evaporator Fan Motor . . . . . . . . . . . . . . . . . . . 44
Evaporator Fan Motor Removal and
In tallation . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
In tallation . . . . . . . . . . . . . . . . . . . . . . . . . 44
Drain Line Heater – DH1 and DH2 . . . . . . . . 44
Drain Line Heater Replacement. . . . . . . . 45
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
In tallation . . . . . . . . . . . . . . . . . . . . . . . . . 45
Fu e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Relay Te ting . . . . . . . . . . . . . . . . . . . . . . . . 47
Relay Replacement. . . . . . . . . . . . . . . . . . . 48
Diode A emblie . . . . . . . . . . . . . . . . . . . . . . . 48
LIS Diode A embly (R-404A Unit
Only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
BYPS Diode A embly (Model 30
and Model 50 Unit Only) . . . . . . . . . . . . . 48
Diode A embly Te ting . . . . . . . . . . . . . . 48
AC Component Model 20 and Model 50
Unit Only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Electrical Contactor . . . . . . . . . . . . . . . . . 50
Compre or Motor Contactor –
CMC................................ 50
Compre or Motor Contactor
Replacement . . . . . . . . . . . . . . . . . . . . . . . 50
Electric Heat Contactor – HC (Model
20 Option Only) . . . . . . . . . . . . . . . . . . . . . . 50
Electric Heat Contactor
Replacement . . . . . . . . . . . . . . . . . . . . . . . 50
Compre or Motor Overload Relay –
OL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Compre or Motor Overload Relay
Replacement . . . . . . . . . . . . . . . . . . . . . . . 50
Tran former – T1. . . . . . . . . . . . . . . . . . . . . 51
Tran former Te ting . . . . . . . . . . . . . . . . . 51
Tran former Replacement . . . . . . . . . . . . 52
Bridge Rectifier – BR. . . . . . . . . . . . . . . . . . 52
Capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Capacitor Te ting . . . . . . . . . . . . . . . . . . . . 52
Capacitor Replacement . . . . . . . . . . . . . . . 52
Start Relay – SR . . . . . . . . . . . . . . . . . . . . . . 53
Start Relay Te ting. . . . . . . . . . . . . . . . . . . 53
Start Relay Replacement . . . . . . . . . . . . . . 53
Compre or Motor . . . . . . . . . . . . . . . . . . . 53
Te ting 115/1/60 Unit . . . . . . . . . . . . . . . . 53
Te ting 208-230/1/60 Unit . . . . . . . . . . . . 53
Compre or Motor Replacement . . . . . . . 54
Electric Standby Circuit . . . . . . . . . . . . . . 54
Heat Option – Truck Engine Coolant . . . . . . . 55
Heat Option – Truck Engine Coolant and
Electric Standby Heater Strip . . . . . . . . . . . . . 56
RReeffrriiggeerraattiioonn MMaaiinntteennaannccee .. .. .... .............. .... .. 5577
Maintenance In pection Schedule. . . . . . . . . 57
Evacuating and Charging the
Refrigeration Sy tem . . . . . . . . . . . . . . . . . . . . 57
Checking the Refrigerant Charge . . . . . . . . . . 57
Te ting the Refrigerant Charge with
an Empty Box. . . . . . . . . . . . . . . . . . . . . . . . 57
Te ting the Refrigerant Charge with
a Loaded Box . . . . . . . . . . . . . . . . . . . . . . . . 57
Suction (Low Side) Bump
Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Checking Compre or Oil Charge . . . . . . . . . 58
Refrigeration Sy tem Check . . . . . . . . . . . . . 59
Cleanup Procedure for Small Truck
Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
TTaabbllee ooff CCoonntteenntt

8TK 56342-18-MM-EN
Tool Required . . . . . . . . . . . . . . . . . . . . . . 59
Clean-up Procedure . . . . . . . . . . . . . . . . . . 59
Putting the Unit Back Into
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
RReeffrriiggeerraattiioonn SSeerrvviiccee OOppeerraattiioonn ............ .. 6611
Engine Driven Compre or . . . . . . . . . . . . . . . 64
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
In tallation . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Electric Standby Compre or . . . . . . . . . . . . . 65
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
In tallation . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Conden er Coil . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
In tallation . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Drier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Di charge Pre ure Tran ducer
(DPT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
In tallation . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Hot Ga Solenoid (HGS) Te t . . . . . . . . . . . . . 65
Liquid Injection Solenoid (LIS) Te t. . . . . . . . 66
Conden er Inlet Solenoid (CIS) Te t . . . . . . 66
CPR Bypa Solenoid Te t . . . . . . . . . . . . . . . 66
Solenoid Valve Replacement . . . . . . . . . . . . . 67
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
In tallation . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Oil Separator . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
In tallation . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Splice Fitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Liquid Injection Metering Orifice . . . . . . . . . . 67
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
In tallation . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Di charge Check Valve (Model 20 and 50
Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Te ting the Di charge Check
Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Di charge Check Valve
Replacement . . . . . . . . . . . . . . . . . . . . . . . . 68
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
In tallation . . . . . . . . . . . . . . . . . . . . . . . . . 68
Expan ion Valve A embly . . . . . . . . . . . . . . . 68
Checking Superheat . . . . . . . . . . . . . . . . . . 68
Expan ion Valve Replacement . . . . . . . . 69
Removal........................... 69
Low Pre ure Cutout Switch (LPCO) . . . . . . . 69
Low Pre ure Cutout Switch
Te t. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Low Pre ure Cutout Switch
Replacement . . . . . . . . . . . . . . . . . . . . . . . . 70
Removal........................... 70
In tallation . . . . . . . . . . . . . . . . . . . . . . . . . 70
Suction Pre ure Regulator Valve (Model
20 MAX Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Suction Pre ure Regulator Valve
Te t. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Suction Pre ure Regulator Valve
Replacement . . . . . . . . . . . . . . . . . . . . . . . . 70
Removal........................... 70
In tallation . . . . . . . . . . . . . . . . . . . . . . . . . 70
Compre or Pre ure Regulator Valve
(Model 30 and 50 Only). . . . . . . . . . . . . . . . . . . 70
Compre or Pre ure Regulator
Valve Te t . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Compre or Pre ure Regulator
Valve Replacement. . . . . . . . . . . . . . . . . . . 71
Removal........................... 71
In tallation . . . . . . . . . . . . . . . . . . . . . . . . . 71
Accumulator (Model 30 and 50
Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
In tallation . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Liquid Line Check Valve . . . . . . . . . . . . . . . . . . 71
Liquid Line Check Valve Te t . . . . . . . . . . 71
Liquid Line Check Valve
Replacement . . . . . . . . . . . . . . . . . . . . . . . . 72
Removal........................... 72
In tallation . . . . . . . . . . . . . . . . . . . . . . . . . 72
Replacing Refrigerant Ho e (Speedy
Clip Sy tem) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
CCoommpprree oorr MMaaiinntteennaannccee .... .. .... .......... .. .... .... 7733
Compre or Failure . . . . . . . . . . . . . . . . . . . . . 73
Compre or Te t . . . . . . . . . . . . . . . . . . . . . . . . 73
Belt Ten ion . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Engine Driven Compre or Belt and
Pulley . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
TTaabbllee ooff CCoonntteenntt

TK 56342-18-MM-EN 9
Electric Standby Compre or
Belt................................. 74
SSttrruuccttuurraall MMaaiinntteennaannccee.... .... .. .... .. .... .... .......... .. 7755
Maintenance In pection Schedule. . . . . . . . . 75
Conden er and Evaporator Coil . . . . . . . . . . 75
Coil Cleaning
Recommendation . . . . . . . . . . . . . . . . . . . 75
Cleaning Interval . . . . . . . . . . . . . . . . . . . 75
Cleaning Method . . . . . . . . . . . . . . . . . . . 75
Unit Mounting Bolt . . . . . . . . . . . . . . . . . . . . . 76
OOvveerr--tthhee--RRooaadd MMeecchhaanniiccaall
DDiiaaggnnoo ii .............. .. .... .. .... .......... .. .... .......... .. .... ........ 7777
EElleeccttrriicc SSttaannddbbyy MMeecchhaanniiccaall
DDiiaaggnnoo ii .............. .. .... .. .... .......... .. .... .......... .. .... ........ 7788
RReeffrriiggeerraattiioonn DDiiaaggnnoo ii ........ .. .... .......... .. .... .... 7799
RReeffrriiggeerraattiioonn DDiiaaggnnoo ii CChhaarrtt .. .... .. .... .......... 8811
DDiiaaggrraamm IInnddeexx.. .. .... .. .... .... .. .... .. .... .... .......... .. .... ...... 8833
TTaabbllee ooff CCoonntteenntt

10 TK 56342-18-MM-EN
Safety Precautions
Danger, Warning, Caution, and
Notice
Thermo King® recommend that all ervice be
performed by a Thermo King dealer and to be aware of
everal general afety practice .
Safety advi orie appear throughout thi manual a
required. Your per onal afety and the proper
operation of thi unit depend upon the trict
ob ervance of the e precaution .
Indicates an imminently hazardous
situation which, if not avoided, will
result in death or serious injury.
Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
Indicates a potentially hazardous
situation which, if not avoided, could
result in minor or moderate injury and
unsafe practices.
Indicates a situation that could result
in equipment or property-damage only
accidents.
General Practices
DDAANNGGEERR
HHaazzaarrdd ooff EExxpplloo iioonn!!
NNeevveerr aappppllyy hheeaatt ttoo aa eeaalleedd rreeffrriiggeerraattiioonn yy tteemm
oorr ccoonnttaaiinneerr.. HHeeaatt iinnccrreeaa ee iinntteerrnnaall pprree uurree,,
wwhhiicchh mmiigghhtt ccaauu ee aann eexxpplloo iioonn rree uullttiinngg iinn ddeeaatthh
oorr eerriioouu iinnjjuurryy..
DDAANNGGEERR
HHaazzaarrddoouu GGaa ee !!
RReeffrriiggeerraanntt iinn tthhee pprree eennccee ooff aann ooppeenn ffllaammee,,
ppaarrkk,, oorr eelleeccttrriiccaall hhoorrtt pprroodduuccee ttooxxiicc ggaa ee tthhaatt
aarree eevveerree rree ppiirraattoorryy iirrrriittaanntt wwhhiicchh ccaann ccaauu ee
eerriioouu iinnjjuurryy oorr ppoo iibbllee ddeeaatthh..
DDAANNGGEERR
RRii kk ooff IInnjjuurryy!!
KKeeeepp yyoouurr hhaanndd ,, ccllootthhiinngg,, aanndd ttooooll cclleeaarr ooff ffaann
aanndd//oorr bbeelltt wwhheenn wwoorrkkiinngg oonn aa uunniitt tthhaatt ii
rruunnnniinngg oorr wwhheenn ooppeenniinngg oorr cclloo iinngg ccoommpprree oorr
eerrvviiccee vvaallvvee .. LLoooo ee ccllootthhiinngg mmiigghhtt eennttaannggllee
mmoovviinngg ppuulllleeyy oorr bbeelltt ,, ccaauu iinngg eerriioouu iinnjjuurryy oorr
ppoo iibbllee ddeeaatthh..
DDAANNGGEERR
RReeffrriiggeerraanntt VVaappoorr HHaazzaarrdd!!
DDoo nnoott iinnhhaallee rreeffrriiggeerraanntt.. UU ee ccaauuttiioonn wwhheenn
wwoorrkkiinngg wwiitthh rreeffrriiggeerraanntt oorr aa rreeffrriiggeerraattiioonn yy tteemm
iinn aannyy ccoonnffiinneedd aarreeaa wwiitthh aa lliimmiitteedd aaiirr uuppppllyy..
RReeffrriiggeerraanntt ddii ppllaaccee aaiirr aanndd ccaann ccaauu ee ooxxyyggeenn
ddeepplleettiioonn,, rree uullttiinngg iinn uuffffooccaattiioonn aanndd ppoo iibbllee
ddeeaatthh..
WWAARRNNIINNGG
HHaazzaarrdd ooff EExxpplloo iioonn!!
NNeevveerr cclloo ee tthhee ccoommpprree oorr ddii cchhaarrggee eerrvviiccee
vvaallvvee wwhheenn tthhee uunniitt ii ooppeerraattiinngg.. NNeevveerr ooppeerraattee
tthhee uunniitt wwiitthh tthhee ddii cchhaarrggee vvaallvvee cclloo eedd ((ffrroonntt
eeaatteedd)).. TThhii ccoonnddiittiioonn iinnccrreeaa ee iinntteerrnnaall
pprree uurree,, wwhhiicchh ccaann ccaauu ee aann eexxpplloo iioonn..
WWAARRNNIINNGG
PPrrooppeerr EEqquuiippmmeenntt CCoonnddiittiioonn!!
GGaauuggee mmaanniiffoolldd hhoo ee mmuu tt bbee iinn ggoooodd ccoonnddiittiioonn
bbeeffoorree uu iinngg tthheemm.. NNeevveerr lleett tthheemm ccoommee iinn ccoonnttaacctt
wwiitthh mmoovviinngg bbeelltt ,, ffaann ,, ppuulllleeyy oorr hhoott uurrffaaccee ..
DDeeffeeccttiivvee ggaauuggee eeqquuiippmmeenntt ccaann ddaammaaggee
ccoommppoonneenntt oorr ccaauu ee eerriioouu iinnjjuurryy..
WWAARRNNIINNGG
PPeerr oonnaall PPrrootteeccttiivvee EEqquuiippmmeenntt ((PPPPEE))
RReeqquuiirreedd!!
AAllwwaayy wweeaarr ggooggggllee oorr aaffeettyy ggllaa ee wwhheenn
wwoorrkkiinngg oonn aa uunniitt.. RReeffrriiggeerraanntt lliiqquuiidd,, ooiill,, aanndd
bbaatttteerryy aacciidd ccaann ppeerrmmaanneennttllyy ddaammaaggee yyoouurr eeyyee ..
SSeeee ““FFiirr tt AAiidd””..
WWAARRNNIINNGG
EEqquuiippmmeenntt DDaammaaggee aanndd RRii kk ooff
IInnjjuurryy!!
NNeevveerr ddrriillll hhoollee iinnttoo tthhee uunniitt uunnllee iinn ttrruucctteedd bbyy
TThheerrmmoo KKiinngg.. HHoollee ddrriilllleedd iinnttoo hhiigghh vvoollttaaggee
ccaabbllee ccoouulldd ccaauu ee aann eelleeccttrriiccaall ffiirree,, eevveerree
ppeerr oonnaall iinnjjuurryy,, oorr eevveenn ddeeaatthh..
WWAARRNNIINNGG
RRii kk ooff IInnjjuurryy!!
WWhheenn uu iinngg llaaddddeerr ttoo iinn ttaallll oorr eerrvviiccee
rreeffrriiggeerraattiioonn yy tteemm ,, aallwwaayy oobb eerrvvee tthhee llaaddddeerr
mmaannuuffaaccttuurreerr’’ aaffeettyy llaabbeell aanndd wwaarrnniinngg .. AA wwoorrkk
ppllaattffoorrmm oorr ccaaffffoollddiinngg ii tthhee rreeccoommmmeennddeedd
mmeetthhoodd ffoorr iinn ttaallllaattiioonn aanndd eerrvviicciinngg..

TK 56342-18-MM-EN 11
CCAAUUTTIIOONN
SShhaarrpp EEddggee !!
EExxppoo eedd ccooiill ffiinn ccaann ccaauu ee llaacceerraattiioonn .. SSeerrvviiccee
wwoorrkk oonn tthhee eevvaappoorraattoorr oorr ccoonnddeenn eerr ccooiill ii bbee tt
lleefftt ttoo aa cceerrttiiffiieedd TThheerrmmoo KKiinngg tteecchhnniicciiaann..
NNOOTTIICCEE
EEqquuiippmmeenntt DDaammaaggee!!
AAllll mmoouunnttiinngg bboolltt mmuu tt bbee tthhee ccoorrrreecctt lleennggtthh ffoorr
tthheeiirr aapppplliiccaattiioonn aanndd ttoorrqquueedd ttoo ppeecciiffiiccaattiioonn..
IInnccoorrrreecctt bboolltt lleennggtthh aanndd iimmpprrooppeerr ttoorrqquuee
ppeecciiffiiccaattiioonn ccaann ddaammaaggee eeqquuiippmmeenntt..
Auto Start/Stop
CCAAUUTTIIOONN
RRii kk ooff IInnjjuurryy!!
TThhee uunniitt ccaann ttaarrtt aanndd rruunn aauuttoommaattiiccaallllyy aannyy ttiimmee
tthhee uunniitt ii ttuurrnneedd oonn.. TTuurrnn tthhee MMiiccrroopprrooccee oorr OOnn//
OOffff wwiittcchh OOffff bbeeffoorree ddooiinngg iinn ppeeccttiioonn oorr wwoorrkkiinngg
oonn aannyy ppaarrtt ooff tthhee uunniitt.. PPlleeaa ee nnoottee tthhaatt oonnllyy
QQuuaalliiffiieedd aanndd CCeerrttiiffiieedd ppeerr oonnnneell hhoouulldd aatttteemmpptt
ttoo eerrvviiccee yyoouurr TThheerrmmoo KKiinngg uunniitt..
CCAAUUTTIIOONN
RRii kk ooff IInnjjuurryy!!
TThhee vveehhiiccllee'' eennggiinnee mmaayy bbee eeqquuiippppeedd wwiitthh AAuuttoo
SSttaarrtt//SSttoopp.. TThhee vveehhiiccllee mmuu tt bbee ttuurrnneedd ooffff bbeeffoorree
eerrvviicciinngg tthhee uunniitt..
Battery Installation and Cable
Routing
WWAARRNNIINNGG
HHaazzaarrdd ooff EExxpplloo iioonn!!
AAnn iimmpprrooppeerrllyy iinn ttaalllleedd bbaatttteerryy ccoouulldd rree uulltt iinn aa
ffiirree,, eexxpplloo iioonn,, oorr iinnjjuurryy.. AA TThheerrmmoo KKiinngg aapppprroovveedd
bbaatttteerryy mmuu tt bbee iinn ttaalllleedd aanndd pprrooppeerrllyy eeccuurreedd ttoo
tthhee bbaatttteerryy ttrraayy..
WWAARRNNIINNGG
HHaazzaarrdd ooff EExxpplloo iioonn!!
IImmpprrooppeerrllyy iinn ttaalllleedd bbaatttteerryy ccaabbllee ccoouulldd rree uulltt iinn
aa ffiirree,, eexxpplloo iioonn,, oorr iinnjjuurryy.. BBaatttteerryy ccaabbllee mmuu tt bbee
iinn ttaalllleedd,, rroouutteedd,, aanndd eeccuurreedd pprrooppeerrllyy ttoo pprreevveenntt
tthheemm ffrroomm rruubbbbiinngg,, cchhaaffffiinngg,, oorr mmaakkiinngg ccoonnttaacctt
wwiitthh hhoott,, hhaarrpp,, oorr rroottaattiinngg ccoommppoonneenntt ..
WWAARRNNIINNGG
FFiirree HHaazzaarrdd!!
DDoo nnoott aattttaacchh ffuueell lliinnee ttoo bbaatttteerryy ccaabbllee oorr
eelleeccttrriiccaall hhaarrnnee ee .. TThhii hhaa tthhee ppootteennttiiaall ttoo
ccaauu ee aa ffiirree aanndd ccoouulldd ccaauu ee eerriioouu iinnjjuurryy oorr
ddeeaatthh..
WWAARRNNIINNGG
PPeerr oonnaall PPrrootteeccttiivvee EEqquuiippmmeenntt ((PPPPEE))
RReeqquuiirreedd!!
AA bbaatttteerryy ccaann bbee ddaannggeerroouu .. AA bbaatttteerryy ccoonnttaaiinn aa
ffllaammmmaabbllee ggaa tthhaatt ccaann iiggnniittee oorr eexxppllooddee.. AA
bbaatttteerryy ttoorree eennoouugghh eelleeccttrriicciittyy ttoo bbuurrnn yyoouu iiff iitt
ddii cchhaarrggee qquuiicckkllyy.. AA bbaatttteerryy ccoonnttaaiinn bbaatttteerryy aacciidd
tthhaatt ccaann bbuurrnn yyoouu.. AAllwwaayy wweeaarr ggooggggllee oorr aaffeettyy
ggllaa ee aanndd ppeerr oonnaall pprrootteeccttiivvee eeqquuiippmmeenntt wwhheenn
wwoorrkkiinngg wwiitthh aa bbaatttteerryy.. IIff yyoouu ggeett bbaatttteerryy aacciidd oonn
yyoouu,, iimmmmeeddiiaatteellyy fflluu hh iitt wwiitthh wwaatteerr aanndd ggeett
mmeeddiiccaall aatttteennttiioonn..
WWAARRNNIINNGG
HHaazzaarrdd ooff EExxpplloo iioonn!!
AAllwwaayy ccoovveerr bbaatttteerryy tteerrmmiinnaall ttoo pprreevveenntt tthheemm
ffrroomm mmaakkiinngg ccoonnttaacctt wwiitthh mmeettaall ccoommppoonneenntt
dduurriinngg bbaatttteerryy iinn ttaallllaattiioonn.. BBaatttteerryy tteerrmmiinnaall
ggrroouunnddiinngg aaggaaiinn tt mmeettaall ccoouulldd ccaauu ee tthhee bbaatttteerryy
ttoo eexxppllooddee..
CCAAUUTTIIOONN
HHaazzaarrddoouu SSeerrvviiccee PPrroocceedduurree !!
SSeett aallll uunniitt eelleeccttrriiccaall ccoonnttrrooll ttoo tthhee OOFFFF ppoo iittiioonn
bbeeffoorree ccoonnnneeccttiinngg bbaatttteerryy ccaabbllee ttoo tthhee bbaatttteerryy ttoo
pprreevveenntt uunniitt ffrroomm ttaarrttiinngg uunneexxppeecctteeddllyy aanndd
ccaauu iinngg ppeerr oonnaall iinnjjuurryy..
NNOOTTIICCEE
EEqquuiippmmeenntt DDaammaaggee!!
DDoo nnoott ccoonnnneecctt ootthheerr mmaannuuffaaccttuurreerr’’ eeqquuiippmmeenntt oorr
aaccccee oorriiee ttoo tthhee uunniitt uunnllee aapppprroovveedd bbyy
TThheerrmmoo KKiinngg.. FFaaiilluurree ttoo ddoo oo ccaann rree uulltt iinn eevveerree
ddaammaaggee ttoo eeqquuiippmmeenntt aanndd vvooiidd tthhee wwaarrrraannttyy..
Refrigerant Hazards
DDAANNGGEERR
HHaazzaarrddoouu PPrree uurree !!
AAllwwaayy ttoorree rreeffrriiggeerraanntt iinn pprrooppeerr ccoonnttaaiinneerr ,, oouutt
ooff ddiirreecctt uunnlliigghhtt aanndd aawwaayy ffrroomm iinntteenn ee hheeaatt..
HHeeaatt iinnccrreeaa ee pprree uurree iinn iiddee ttoorraaggee ccoonnttaaiinneerr ,,
wwhhiicchh ccaann ccaauu ee tthheemm ttoo bbuurr tt aanndd ccoouulldd rree uulltt iinn
eevveerree ppeerr oonnaall iinnjjuurryy..
SSaaffeettyy PPrreeccaauuttiioonn

12 TK 56342-18-MM-EN
DDAANNGGEERR
CCoommbbuu ttiibbllee HHaazzaarrdd!!
DDoo nnoott uu ee ooxxyyggeenn ((OO22 )) oorr ccoommpprree eedd aaiirr ffoorr lleeaakk
ttee ttiinngg.. OOxxyyggeenn mmiixxeedd wwiitthh rreeffrriiggeerraanntt ii
ccoommbbuu ttiibbllee..
WWAARRNNIINNGG
HHaazzaarrddoouu GGaa ee !!
DDoo nnoott uu ee aa HHaalliiddee ttoorrcchh.. WWhheenn aa ffllaammee ccoommee iinn
ccoonnttaacctt wwiitthh rreeffrriiggeerraanntt,, ttooxxiicc ggaa ee aarree pprroodduucceedd..
TThhee ee ggaa ee ccaann ccaauu ee uuffffooccaattiioonn,, eevveenn ddeeaatthh..
WWAARRNNIINNGG
PPeerr oonnaall PPrrootteeccttiivvee EEqquuiippmmeenntt ((PPPPEE))
RReeqquuiirreedd!!
RReeffrriiggeerraanntt iinn aa lliiqquuiidd ttaattee eevvaappoorraattee rraappiiddllyy
wwhheenn eexxppoo eedd ttoo tthhee aattmmoo pphheerree,, ffrreeeezziinngg
aannyytthhiinngg iitt ccoonnttaacctt .. WWeeaarr bbuuttyyll lliinneedd gglloovvee aanndd
ootthheerr ccllootthhiinngg aanndd eeyyee wweeaarr wwhheenn hhaannddlliinngg
rreeffrriiggeerraanntt ttoo hheellpp pprreevveenntt ffrroo ttbbiittee..
NNOOTTIICCEE
EEqquuiippmmeenntt DDaammaaggee!!
WWhheenn bbeeiinngg ttrraann ffeerrrreedd,, rreeffrriiggeerraanntt mmuu tt bbee iinn
lliiqquuiidd ttaattee ttoo aavvooiidd ppoo iibbllee eeqquuiippmmeenntt ddaammaaggee..
Refrigerant Oil Hazards
WWAARRNNIINNGG
PPeerr oonnaall PPrrootteeccttiivvee EEqquuiippmmeenntt ((PPPPEE))
RReeqquuiirreedd!!
PPrrootteecctt yyoouurr eeyyee ffrroomm ccoonnttaacctt wwiitthh rreeffrriiggeerraanntt ooiill..
TThhee ooiill ccaann ccaauu ee eerriioouu eeyyee iinnjjuurriiee .. PPrrootteecctt kkiinn
aanndd ccllootthhiinngg ffrroomm pprroolloonnggeedd oorr rreeppeeaatteedd ccoonnttaacctt
wwiitthh rreeffrriiggeerraanntt ooiill.. TToo pprreevveenntt iirrrriittaattiioonn,, wwaa hh
yyoouurr hhaanndd aanndd ccllootthhiinngg tthhoorroouugghhllyy aafftteerr hhaannddlliinngg
tthhee ooiill.. RRuubbbbeerr gglloovvee aarree rreeccoommmmeennddeedd..
NNOOTTIICCEE
EEqquuiippmmeenntt DDaammaaggee!!
UU ee tthhee ccoorrrreecctt ooiill iinn TThheerrmmoo KKiinngg yy tteemm ttoo
aavvooiidd ddaammaaggiinngg eeqquuiippmmeenntt aanndd nnuulllliiffyyiinngg iitt
wwaarrrraannttyy..
NNOOTTIICCEE
EEqquuiippmmeenntt DDaammaaggee!!
DDoo nnoott mmiixx rreeffrriiggeerraanntt ooiill .. MMiixxiinngg iinnccoommppaattiibbllee
ooiill wwiillll ddaammaaggee tthhee yy tteemm..
NNOOTTIICCEE
EEqquuiippmmeenntt DDaammaaggee!!
UU ee ddeeddiiccaatteedd rreeffrriiggeerraattiioonn eeqquuiippmmeenntt ttoo pprreevveenntt
ccoonnttaammiinnaattiinngg rreeffrriiggeerraattiioonn yy tteemm wwiitthh tthhee
wwrroonngg ttyyppee ooff ooiill oorr rreeffrriiggeerraanntt..
NNOOTTIICCEE
SSyy tteemm CCoonnttaammiinnaattiioonn!!
DDoo nnoott eexxppoo ee tthhee rreeffrriiggeerraanntt ooiill ttoo tthhee aaiirr aannyy
lloonnggeerr tthhaann nneeccee aarryy.. SSttoorree rreeffrriiggeerraanntt ooiill iinn aann
aapppprroovveedd eeaalleedd ccoonnttaaiinneerr ttoo aavvooiidd mmooii ttuurree
ccoonnttaammiinnaattiioonn.. TThhee ooiill wwiillll aabb oorrbb mmooii ttuurree,,
wwhhiicchh rree uulltt iinn mmuucchh lloonnggeerr eevvaaccuuaattiioonn ttiimmee
aanndd ppoo iibbllee yy tteemm ccoonnttaammiinnaattiioonn..
NNOOTTIICCEE
MMaatteerriiaall DDaammaaggee!!
WWiippee uupp ppiillll iimmmmeeddiiaatteellyy.. RReeffrriiggeerraanntt ooiill ccaann
ddaammaaggee ppaaiinntt aanndd rruubbbbeerr mmaatteerriiaall ..
Electrical Hazards
High Voltage
DDAANNGGEERR
HHaazzaarrddoouu VVoollttaaggee!!
WWhheenn eerrvviicciinngg oorr rreeppaaiirriinngg aa tteemmppeerraattuurree ccoonnttrrooll
uunniitt,, tthhee ppoo iibbiilliittyy ooff eerriioouu oorr eevveenn ffaattaall iinnjjuurryy
ffrroomm eelleeccttrriiccaall hhoocckk eexxii tt .. EExxttrreemmee ccaarree mmuu tt bbee
uu eedd wwhheenn wwoorrkkiinngg wwiitthh aa rreeffrriiggeerraattiioonn uunniitt tthhaatt ii
ccoonnnneecctteedd ttoo aa oouurrccee ooff ooppeerraattiinngg ppoowweerr,, eevveenn iiff
tthhee uunniitt ii nnoott ooppeerraattiinngg.. LLeetthhaall vvoollttaaggee ppootteennttiiaall
ccaann eexxii tt aatt tthhee uunniitt ppoowweerr ccoorrdd,, iinn iiddee tthhee ccoonnttrrooll
bbooxx,, aatt tthhee mmoottoorr aanndd wwiitthhiinn tthhee wwiirriinngg
hhaarrnnee ee ..
WWAARRNNIINNGG
HHaazzaarrddoouu VVoollttaaggee!!
TThhee uunniitt OOnn//OOffff wwiittcchh mmuu tt bbee ttuurrnneedd OOffff bbeeffoorree
ccoonnnneeccttiinngg oorr ddii ccoonnnneeccttiinngg tthhee ttaannddbbyy ppoowweerr
pplluugg.. NNeevveerr aatttteemmpptt ttoo ttoopp tthhee uunniitt bbyy
ddii ccoonnnneeccttiinngg tthhee ppoowweerr pplluugg..
WWAARRNNIINNGG
RRii kk ooff IInnjjuurryy!!
TThhee uunniitt ppoowweerr pplluugg mmuu tt bbee cclleeaann aanndd ddrryy bbeeffoorree
ccoonnnneeccttiinngg iitt ttoo aa ppoowweerr oouurrccee..
SSaaffeettyy PPrreeccaauuttiioonn

TK 56342-18-MM-EN 13
WWAARRNNIINNGG
RRii kk ooff IInnjjuurryy!!
DDoo nnoott mmaakkee rraappiidd mmoovvee wwhheenn wwoorrkkiinngg oonn hhiigghh
vvoollttaaggee cciirrccuuiitt iinn rreeffrriiggeerraattiioonn uunniitt .. DDoo nnoott ggrraabb
ffoorr ffaalllliinngg ttooooll bbeeccaauu ee yyoouu mmiigghhtt aacccciiddeennttaallllyy
ttoouucchh aa hhiigghh vvoollttaaggee oouurrccee..
WWAARRNNIINNGG
HHaazzaarrddoouu VVoollttaaggee!!
TTrreeaatt aallll wwiirree aanndd ccoonnnneeccttiioonn aa iiff tthheeyy wweerree
hhiigghh vvoollttaaggee uunnttiill aa mmeetteerr aanndd wwiirriinngg ddiiaaggrraamm
iinnddiiccaattee ootthheerrwwii ee.. OOnnllyy uu ee ttooooll wwiitthh iinn uullaatteedd
hhaannddllee .. NNeevveerr hhoolldd uunniinn uullaatteedd mmeettaall ttooooll nneeaarr
eexxppoo eedd,, eenneerrggiizzeedd ccoonndduuccttoorr ..
WWAARRNNIINNGG
HHaazzaarrddoouu VVoollttaaggee!!
NNeevveerr wwoorrkk aalloonnee oonn hhiigghh vvoollttaaggee cciirrccuuiitt iinn tthhee
rreeffrriiggeerraattiioonn uunniitt.. AAnnootthheerr ppeerr oonn hhoouulldd bbee
nneeaarrbbyy ttoo hhuutt ooffff tthhee uunniitt aanndd pprroovviiddee aaiidd iinn tthhee
eevveenntt ooff aann aacccciiddeenntt..
WWAARRNNIINNGG
PPeerr oonnaall PPrrootteeccttiivvee EEqquuiippmmeenntt ((PPPPEE))
RReeqquuiirreedd!!
SSaaffeettyy ggllaa ee ,, rruubbbbeerr--iinn uullaatteedd gglloovvee ,, aanndd ccaabbllee
ccuutttteerr hhoouulldd bbee nneeaarr yyoouurr wwoorrkk aarreeaa iinn tthhee eevveenntt
ooff aann eelleeccttrriiccaall aacccciiddeenntt..
WWAARRNNIINNGG
HHaazzaarrddoouu VVoollttaaggee ww//CCaappaacciittoorr !!
BBee ccaarreeffuull wwhheenn wwoorrkkiinngg wwiitthh eelleeccttrriiccaall cciirrccuuiitt
tthhaatt ccoonnttaaiinn ccaappaacciittoorr .. SSoommee ccaappaacciittoorr hhoolldd aa
iiggnniiffiiccaanntt eelleeccttrriiccaall cchhaarrggee tthhaatt mmiigghhtt ccaauu ee
bbuurrnn oorr hhoocckk iiff aacccciiddeennttaallllyy ddii cchhaarrggeedd..
CCaappaacciittoorr mmuu tt bbee ddii cchhaarrggeedd bbeeffoorree wwoorrkkiinngg oonn
eelleeccttrriiccaall cciirrccuuiitt ..
Low Voltage
WWAARRNNIINNGG
LLiivvee EElleeccttrriiccaall CCoommppoonneenntt !!
CCoonnttrrooll cciirrccuuiitt uu eedd iinn rreeffrriiggeerraattiioonn uunniitt aarree llooww
vvoollttaaggee ((1122 ttoo 2244 vvoolltt ddcc)).. HHoowweevveerr,, tthhee llaarrggee
aammoouunntt ooff aammppeerraaggee aavvaaiillaabbllee ccaann ccaauu ee eevveerree
bbuurrnn iiff aacccciiddeennttaallllyy hhoorrtteedd ttoo ggrroouunndd wwiitthh mmeettaall
oobbjjeecctt ,, uucchh aa ttooooll .. DDoo nnoott wweeaarr jjeewweellrryy,,
wwaattcchhee ,, oorr rriinngg bbeeccaauu ee tthheeyy iinnccrreeaa ee tthhee rrii kk ooff
hhoorrttiinngg oouutt eelleeccttrriiccaall cciirrccuuiitt aanndd ddaammaaggiinngg
eeqquuiippmmeenntt oorr ccaauu iinngg eevveerree bbuurrnn ..
Microprocessor Service
Precautions
Take precaution to prevent electro tatic di charge
when ervicing the microproce or and it related
component . Even tiny amount of current can
everely damage or de troy electronic component .
Ob erve the following precaution when ervicing a
microproce or control y tem to avoid damaging
electronic component . Refer to the appropriate
microproce or diagno i manual for more
information.
• If the microproce or ha a power witch, turn it
OFF before connecting or di connecting the battery.
• Di connect power to the unit.
• Avoid wearing clothing that generate tatic
electricity (wool, nylon, polye ter, etc.).
• Wear a wri t trap (P/N 204-622 or equivalent) with
the lead end connected to the microproce or’
ground terminal. The e trap are available from
mo t electronic equipment di tributor . DO NOT
wear the e trap with power applied to the unit.
• Avoid unnece ary contact with the electronic
component .
• Store and hip electronic component in anti tatic
bag and protective packaging.
• Leave electronic component in their anti tatic
packing material until you’re ready to u e them.
• After ervicing any electronic component , check
the wiring for po ible error before re toring
power to the unit.
• Never u e a battery and a light bulb to te t circuit
on any microproce or-ba ed equipment.
Welding Precautions
Take precaution before electrically welding any
portion of the unit or the vehicle to which it i attached.
Verify that welding current are not allowed to flow
through the unit’ electronic circuit .
Ob erve the following precaution when welding to
avoid damaging electronic component .
• If the microproce or ha a power witch, turn it
OFF before connecting or di connecting the battery.
• Di connect power to the unit.
• Di connect all wire harne e from the
microproce or.
• If there are any electrical circuit breaker in the
control box, witch them OFF.
• Clo e the control box.
• Component that could be damaged by welding
park hould be removed from the unit.
SSaaffeettyy PPrreeccaauuttiioonn

14 TK 56342-18-MM-EN
• U e normal welding procedure , but keep the
ground return electrode a clo e to the area being
welded a practical. Thi will reduce the likelihood
of tray welding current pa ing through any
electronic circuit .
First Aid
RREEFFRRIIGGEERRAANNTT
•EEyyee :: For contact with liquid, immediately flu h
eye with large amount of water and get prompt
medical attention.
•SSkkiinn:: Flu h area with large amount of warm water.
Do not apply heat. Remove contaminated clothing
and hoe . Wrap burn with dry, terile, bulky
dre ing to protect from infection. Get prompt
medical attention. Wa h contaminated clothing
before reu e.
•IInnhhaallaattiioonn:: Move victim to fre h air and u e Cardio
Pulmonary Re u citation (CPR) or mouth-to-mouth
re u citation to re tore breathing, if nece ary. Stay
with victim until emergency per onnel arrive.
•FFrroo tt BBiittee:: In the event of fro t bite , the objective
of Fir t Aid are to protect the frozen area from
further injury, warm the affected area rapidly, and
to maintain re piration.
RREEFFRRIIGGEERRAANNTT OOIILL
•EEyyee :: Immediately flu h with large amount of
water for at lea t 15 minute . Get prompt medical
attention.
•SSkkiinn:: Remove contaminated clothing. Wa h
thoroughly with oap and water. Get medical
attention if irritation per i t .
•IInnhhaallaattiioonn:: Move victim to fre h air and u e Cardio
Pulmonary Re u citation (CPR) or mouth-to-mouth
re u citation to re tore breathing, if nece ary. Stay
with victim until emergency per onnel arrive.
•IInnggee ttiioonn:: Do not induce vomiting. Immediately
contact local poi on control center or phy ician.
EENNGGIINNEE CCOOOOLLAANNTT
•EEyyee :: Immediately flu h with large amount of
water for at lea t 15 minute . Get prompt medical
attention.
•SSkkiinn:: Remove contaminated clothing. Wa h
thoroughly with oap and water. Get medical
attention if irritation per i t .
•IInnggee ttiioonn:: Do not induce vomiting. Immediately
contact local poi on control center or phy ician.
BBAATTTTEERRYY AACCIIDD
•EEyyee :: Immediately flu h with large amount of
water for at lea t 15 minute . Get prompt medical
attention. Wa h kin with oap and water.
EELLEECCTTRRIICCAALL SSHHOOCCKK
Take IMMEDIATE action after a per on ha received an
electrical hock. Get quick medical a i tance, if
po ible.
The ource of the hock mu t be quickly topped, by
either hutting off the power or removing the victim. If
the power cannot be hut off, the wire hould be cut
with an non-conductive tool, uch a a wood-handle
axe or thickly in ulated cable cutter . Re cuer hould
wear in ulated glove and afety gla e , and avoid
looking at wire being cut. The en uing fla h can cau e
burn and blindne .
If the victim mu t be removed from a live circuit, pull
the victim away with a non-conductive material. U e
wood, rope, a belt or coat to pull or pu h the victim
away from the current. DO NOT TOUCH the victim. You
will receive a hock from current flowing through the
victim’ body. After eparating the victim from power
ource, immediately check for ign of a pul e and
re piration. If no pul e i pre ent, tart Cardio
Pulmonary Re u citation (CPR). If a pul e i pre ent,
re piration might be re tored by u ing mouth-to-
mouth re u citation. Call for emergency medical
a i tance.
AASSPPHHYYXXIIAATTIIOONN
Move victim to fre h air and u e Cardio Pulmonary
Re u citation (CPR) or mouth-to-mouth re u citation to
re tore breathing, if nece ary. Stay with victim until
emergency per onnel arrive.
SSaaffeettyy PPrreeccaauuttiioonn

TK 56342-18-MM-EN 15
Model Syste s (Syste Designations)
V-220 and V-320 Truck Refrigeration Syste s
System Designation System Number Install Kit Refrigerant Schematic, Wiring Diagrams
V-220 10 903495 801131 R-134a 3E34872, 3E34873
V-220 20 903496 801132 R-134a 3E34870, 3E34871
V-220 MAX 10 903491 801096 R-404A 3E34872, 3E34873
V-220 MAX 20 903492 801093 R-404A 3E34870, 3E34871
V-320 10 903497 801133 R-134a 3E34872, 3E34873
V-320 20 903498 801134 R-134a 3E34870, 3E34871
V-320 MAX 10 903493 801094 R-404A 3E34872, 3E34873
V-320 MAX 20 903494 801095 R-404A 3E34870, 3E34871
V-320 MAX 30 903677 801094 R-404A 3E34868, 3E34869
V-320 MAX 50 903678 801095 R-404A 3E34864, 3E34865

16 TK 56342-18-MM-EN
Specifications
Electrical Syste
Fuses
Fuse 3: Evaporator Fan Motor (EFM1) 15 amps
Fuse 4: Evaporator Fan Motor (EFM2) 15 amps
Fuse 5: Roadside (Engine) Compressor Clutch (CLU1), Hot Gas Solenoid (HGS),
Liquid Injection Switch (LISW), Liquid Injection Solenoid (LIS), Electric Standby
Compressor Clutch (CLU2), Compressor Motor Contactor (CMC), CPR Bypass
Solenoid (BYPS), Condenser Inlet Solenoid (CIS)
20 amps
Fuse 6: Drain Line Heaters (DH1 and DH2) 2 amps
Fuse 14: Vehicle Ignition Switch 4 amps
Fuse 15: Controller Battery Power Supply (located in 2 wire near battery.) 4 amps
Fuse 16: Controller Standby Power Supply (located at capacitor in condenser
section)
5 amps
Fuse 20: Transformer AC Power Supply (located at compressor motor contactor in
condenser section)
5 amps
Fuse 21: Battery Power Supply (located in 2 wire near battery) 60 amps
Fuse 26: Evaporator Fan Motor 2 (EFM2) (located in 2A wire near terminal strip in
condenser section Electric Heat Option only)
15 amps
Fuse 30: Condenser Fan Motor (CFM) (located in CF1 wire near terminal strip in
condenser section)
20 amps
Condenser Fan Motor
Full Load Current 10.0-10.8 amps at 13 Vdc
Resistance 1.3 ohms
Evaporator Fan Motors (Each)
Full Load Current 7.3-7.9 amps at 13 Vdc
Resistance 1.7 ohms
Coil for Hot Gas Solenoid (HGS)
Current 1.2 amps at 12 Vdc
Resistance 10.0 ohms
Coil for Liquid Injection Solenoid (LIS) – MAX Only
Current 1.2 amps at 12 Vdc
Resistance 10.0 ohms
Coil for Condenser Inlet Solenoid (CIS) - Model 30 and 50 Only
Current 2.3 amps at 12 Vdc
Resistance 5.2 ohms
Coil for CPR Bypass Solenoid (BYPS) - Model 30 and 50 Only
Current 2.3 amps at 12 Vdc
Resistance 5.2 ohms
Coil for Coolant Heat Valve Solenoid (CV) - Truck Engine Coolant Heat Option Only
Current 1.5 amps at 12 Vdc
Resistance 8.0 ohms

TK 56342-18-MM-EN 17
Coolant Heat Pump Motor (CP) - Truck Engine Coolant Heat Option Only
Current 1.5 Amps at 12 Vdc
Resistance 8.0 ohms
Drain Line Heaters (Each) - MAX Only
Current 0.9 amps ± 5% at 68 F (20 C) at 12 Vdc
Resistance 13.8 ohms ± 5% at 68 F (20 C)
Battery Power Relay (BPR)
Type Single Pole Single Throw (SPST)
Contacts Terminals 30 to 87 Normally Open (NO)
Coil Resistance Terminals 85 to 86 90 ohms
Electric Standby Power Relay (ESR)
Type Single Pole Single Throw (SPST)
Contacts Terminals 30 to 87 Normally Open (NO)
Coil Resistance Terminals 85 to 86 90 ohms
Battery Disconnect Relay (BDR)
Type Single Pole Double Throw (SPDT)
Contacts Terminals 30 to 87
Terminals 30 to 87A
Normally Open (NO)
Normally Closwe (NC)
Coil Resistance Terminals 85 to 86 90 ohms
Refrigeration Syste
R-134a Refrigeration Syste V-220/V-320
Refrigerant Charge: V-220 - Model 10
V-220 - Model 20
V-320 - Model 10
V-320 - Model 20
2.8 lb (1.27 kg) R-134a
2.8 lb (1.27 kg) R-134a
3.3 lb (1.50 kg) R-134a
3.4 lb (1.54 kg) R-134a
Defrost Termination Switch: Opens
Closes
48.0 ± 5.0 F (8.9 ± 2.8 C)
36.0 ± 5.0 F (2.2 ± 2.8 C)
Low Pressure Cutout Switch (LPCO): Opens
Closes
5 to 11 in. Hg vacuum (-17 to -37 kPa)
4 to 7 psig (28 to 48 kPa)
Over Temperature Switch - Electric Heater
Option Only:
Opens
Closes
105 ± 5 F (41 ± 3 C)
90 ± 5 F (32 ± 3 C)
R-404A Refrigeration Syste V-220/V-320 MAX
Refrigerant Charge: V-220 MAX - Model 10
V-220 MAX - Model 20
V-320 MAX - Model 10
V-320 MAX - Model 20
V-320 MAX - Model 30
V-320 MAX - Model 50
2.5 lb (1.13 kg) R-404A
2.6 lb (1.18 kg) R-404A
3.0 lb (1.36 kg) R-404A
3.1 lb (1.41 kg) R-404A
3.1 lb (1.41 kg) R-404A
3.2 lb (1.45 kg) R-404A
Defrost Termination Switch: Opens
Closes
48.0 ± 5.0 F (8.9 ± 2.8 C)
36.0 ± 5.0 F (2.2 ± 2.8 C)
Liquid Injection Switch (LISW): Opens
Closes
200 ± 5 F (93 ± 3 C)
230 ± 5 F (110 ± 3 C)
Low Pressure Cutout Switch (LPCO): Opens
Closes
5 to 11 in. Hg vacuum (-17 to -37 kPa)
4 to 7 psig (28 to 48 kPa)
Over Temperature Switch - Electric Heater
Option Only:
Opens
Closes
105 ± 5 F (41 ± 3 C)
90 ± 5 F (32 ± 3 C)
SSppeecciiffiiccaattiioonn

18 TK 56342-18-MM-EN
Compressor Pressure Regulator (CPR) Valve Setting - Model 30 and 50 Only 24 ± 2 psig (165 ± 14 kPa)
Electric Standby Suction Pressure Regulator (SPR) Valve Setting - Model 20 MAX Only 24 ± 2 psig (165 ± 14 kPa)
Co pressors
Standard Engine Driven Compressor: V-220
V-320
TK-13, 8 cu. in. (131 cc), Swash Plate, 6 Cylinder
TK-15, 9 cu. in. (147 cc), Swash Plate, 6 Cylinder
Optional Engine Driven Compressor TK-208R, 7.6 cu. in. (125 cc), Reciprocating, 2 Cylinder
Electric Standby Compressor - Model 20 and 50 Only TK-13, 8 cu. in. (131 cc), Electric Motor Driven, Swash Plate, 6
Cylinder
System Oil Capacity - Swash Plate
Compressors:
Model 10
Model 20
Model 30
Model 50
13 oz (384 cc)
17 oz (503 cc)
17 oz (503 cc)
21 oz (621 cc)
System Oil Capacity - Reciprocating
Compressor:
Model 10
Model 20
Model 30
Model 50
26 oz (769 cc)
30 oz (887 cc)
30 oz (887 cc)
34 oz (1006 cc)
Compressor Oil Type: POE 120 2030515 33.8 oz. (1 Liter)
POE 120 2030505 8 oz. (236 ml)
Compressor Clutch Coil - Swash Plate: Voltage
Resistance
12 Vdc
3.2 ohms at 77 F (25 C)
Compressor Clutch Coil - Reciprocating: Voltage
Resistance
12 Vdc
3-4 ohms
Defrost Method Hot Gas
Defrost Timer Initiation Interval Adjustable, 0 to 8 hours, default is 4 hours
Defrost Termination Interval Defrost is terminated by Klixon switch, or by Defrost
Termination Timer [dtt] adjustable, 5 to 50 minutes, default is
30 minutes.
NNOOTTIICCEE
EEqquuiippmmeenntt DDaammaaggee!!
UU ee tthhee ccoorrrreecctt ooiill iinn TThheerrmmoo KKiinngg yy tteemm ttoo aavvooiidd ddaammaaggiinngg eeqquuiippmmeenntt aanndd nnuulllliiffyyiinngg iitt wwaarrrraannttyy..
AC Electric Co pressor Motors and Overload Relays
Voltage/Phase/
Frequency
Horsepower Kilowatts RPM Full Load (amps) Overload Relay
Setting (amps)
115/1/60 1.5 1.1 1710 14 14
208/1/60 2.0 1.5 1740 9.5 9.5
230/1/60 2.0 1.5 1750 9 9
208/3/60 2.4 1.8 1730 7.2 7.2
230/3/60 2.4 1.8 1750 6.9 7
Contactors
Compressor Motor Contactor (CMC) and Optional Electric Heat Contactor (HC)
Contacts Normally Open
Coil Voltage 12 Vdc
SSppeecciiffiiccaattiioonn

TK 56342-18-MM-EN 19
Coil Current 0.25 amps
Coil Resistance 48 ohms
Capacitors
Capacitor Capacitance
Smoothing Capacitor (C1) – all voltages 6800 μF
Electric Motor Run Capacitor 1 (RC1) – 115/1/60 units 60 μF
Electric Motor Run Capacitor 2 (RC2) – 115/1/60 units 60 μF
Electric Motor Start Capacitor (SC) – 115/1/60 units 300 μF
Electric Motor Run Capacitor (RC) – 208-230/1/60 units 40 μF
Electric Motor Start Capacitor (SC) – 208-230/1/60 units 150 μF
Transfor er
Power 500 VA
Frequency 50/60 Hz
Primary Inputs 115-208-230 Vac
Secondary Nominal Voltage 11.7 Vac (21.4 Amps)
Start Relay (SR)
Type Single Pole Single Throw (SPST)
Contacts Terminals P to J Normally Closed (NC)
Coil Resistance Terminals B to J 560 ohms ( 115 Vac Black Cover)
3,600 ohms (208-230 Vac Gray Cover)
SSppeecciiffiiccaattiioonn

20 TK 56342-18-MM-EN
Electric Standby Power Supply Require ents
Power Cord Length
Power Cord Size (AWG)
Voltage Phase Hz Power Supply Circuit Breaker 25 ft 50 ft 75 ft
115 Vac 1 60 30 amp 10 10 None
208-230 Vac 1 50/60 20 amp 14 12 12
208-230 Vac 3 50/60 20 amp 14 12 12
Optional Electric Heaters
Voltage Power Rating Watts Current Resistance
115 Vac 1500 13 amps 8.8 ohms
208-230 Vac 1500 6.5 amps 35.4 ohms
Belt Tension
Belt Field Reset
Engine Driven Compressor Belt Check vehicle manufacturer specifications
Electric Motor Driven Compressor Belt 43-63 Using TK Gauge P/N 204-427
Solder Applications
Refrigeration Components
For general refrigeration tubing connections:
copper to copper or copper to brass
Joint Clearances: 0.003 to 0.005 in. (0.076 to 0.127 mm)
Use: Solder Type 15% Silver TK No. 203-364 Use: Flux Type TK
No. 203-365
For refrigeration tubing connections of dissimilar metals:
copper to stainless steel or brass to stainless steel
Joint Clearances: 0.003 to 0.005 in. (0.076 to 0.127 mm)
Use: Solder Type 35% Silver TK No. 203-366 Use: Flux Type TK
No. 203-365
Hot Water Component
For hot water tubing connections:
copper to copper or copper to brass
Joint Clearances: 0.003 to 0.005 in. (0.076 to 0.127 mm)
Use: Solder Type 95% Tin and 5% antimony TK No. 204-167 Use:
Flux Type TK No. 204-417
For hot water tubing connections of dissimilar metals:
copper to stainless steel or brass to stainless steel
Joint Clearances: 0.003 to 0.005 in. (0.076 to 0.127 mm)
Use: Solder Type 35% Silver TK No. 203-366 Use: Flux Type TK
No. 203-365
NOTE: Some units may be equipped with compressor pressure regulator (CPR) valve and/or suction pressure regulator (SPR)
valve. To reduce the chance of overheating the CPR/SPR/DPR valve, 95-5 solder or equivalent may be used.
Use 95-5 TK No. 204-167
Use Flux TK No. 204-417
SSppeecciiffiiccaattiioonn