Hansen Pxvc-l, Pxvc-p, Pxvc-t, Pxvc-pt, Pxvc-ci User Manual
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PXVC
Bulletin PXVC
MAY 2012
Specifications, Applications,
Service Instructions & Parts
PXVC
UNIVERSAL CONTROLLER
PXVC-PT, PXVC-DX, PXVC-T,
PXVC-L, PXVC-P, PXVC-CI
INTRODUCTION
The PXVC Intelligent, single loop, PID controller is a stand-
alone cabinet mounted electronic universal controller.
The Han sen PXVC c ontroller ca n be co nfigured for
several different applications. The controller, with factory
defaults , will give reasonab ly good cont rol. If contr ol
difficult ies occur during star t up, it is re comm ended
first to thor oughly chec k sys tem a nd components for
proper installation, operation, and sensor location before
at tem pti ng to tune th e PXVC controller.
Fi el d al te r a t i o n o f the controlle r conf i g u r a ti o n is
not recomme nded. Control ler tu nin g of the P- I-D is
perfo rme d in the “parameter s” section and are the only
parameter s the user may n eed to o ptimiz e.
GENERAL DESCRIPTIONS
PX VC-PT (Pr e ssure Tem pera t ure)
Su p erhe at /Subc ooli n g C ontro ller
The PXVC-PT controller is used in applications where the
system te mper atures are n ot les s than -20°F (-28. 9°C).
It is fac tor y prog r ammed to provi de pre cise c ont rol of
the H ansen PXV puls e wi dth ex pansion va lve fo r direc t
expansion evaporators. The 2 inputs, pressure transducer
and temperature probe, are used to determine the amount
of Superheat or Subcooling in a controlled refrigeration
system. The PXVC-PT pulses the PXV valve open and
closed at a rate equal to the refrigerant flow necessar y to
maintain a set-for superheated gas leaving the evaporator.
For wiring diagram refer to Hansen drawing 7000 -93, -94.
PX VC-DX C ontro l o f E vapo rato r
The Hansen PXVC-DX Controller is used with system
temperatures less than -2 0°F (-28.9°C). It is factory
programmed to provide precise control of the Hansen
PXV pulse width expansion valve for direct expansion
evaporators. A 4-20 mA i nput signal fr om the Hansen
HPT super heat sensor or computer output of super heat
to the PXVC-DX cont roller which pulse s the Hansen
PXV val ve. T he va lve opens a nd clo ses at a rate equ al
to the r efr iger ant flow neces s ary to m aint ain a s et-for
super heated gas le aving the eva porator. For wiring
diagram, refer to Hansen drawings 7000-79, -80, -81, -87.
PX VC-T Tem perat ure Cont r ol
The Hansen PXVC-T Controller is factor y programmed to
provide p reci se co ntrol of temp erat ure in applications
suc h a s L iq ui d I nj ec tio n o r s c rew c o m pr ess o r s.
A temp erature sensor, include d, provides an i nput to
the Hansen PXVC-T controller which puls es the Hansen
PXV val ve. T he va lve opens a nd clo ses at a rate equ al
to the refrigera nt f low nec essa r y to maintain a set for
discharge gas temperat ure. For wiring diag ram, refer
to Hans en drawing 700 0 - 8 4, -99.
PX VC-L Lev el Cont r ol of Floo ded Eva porat ors
The Han sen PXVC - L Con troller is factor y p rogr amme d
to provide pr ecise control of liquid level in floode d
ev a p o r ator s , s m a l l liquid recirculators , and other
refrigera nt leve l vessel s. A 4 -20 mA in put s ignal from
the Ha nsen VLT level probe, Ha nsen Vari-L evel with
4-20 mA , or ot her liqu id level dev ice to the Hansen
PXVC - L controller whi ch pulse s the Han sen PXV valve.
The valve ope ns and cl ose s at a rate equal to the
refrigera nt flow nece ssar y to mai ntai n a s et-for liq uid
level in the vessel. For wiring diagr am, refer to Ha nsen
drawing 70 00-85.
PX VC-P Pre s sure Con t rol
The Ha nsen PX VC- P Controller is factory pr ogra mmed
to provi de prec ise control of pres sure in a pplication s
such as hot gas byp ass to suct ion of a co mpre ssor.
A pres sure sensor, avail able from Ha nse n, p rov ide s an
input to the Hansen PXVC -P cont roller which pulses
the Hans en PXV va lve. The valve op ens and close s at a
rate equal to the refrigera nt flow nec essar y to mai nta in
a set for p ress ure. For wir ing diagram, ref er to Hansen
drawing 70 01-00.
PX VC-CI Con t rol Inter face
The Han sen PXVC - CI Controll er is fa ctory program med
as a signal conver ter for 4 -20 mA input, d irec t acting ,
PWM output were 20 mA = 100% ON, 12mA = 50% PWM
and 4mA = 0% OFF. Allows an existing system wit h
4-20 mA output to be fitted with PWM valve co ntr ol.
For wiring d iagr am, re fer to Hans en drawing 700 0 - 8 9.
PO WER SUP PLY
SI G N AL INPU TS
SIGNAL OUTPUTS
EN V I RON M E NT
STA N DAR D S
GE N E R A L
*Pul se wi dth m odu lat ion
TECHNICAL SPECIFICATIONS
PX VC-P T
Operating Voltage 24V AC, 5 0/60 Hz ±10% (O R) 24VD C
Power Co nsu mpt ion Ma x . 3 VA
Elect ric al Connec tio n Termi nal C onn ectors, R emova ble AWG 24…12
Inpu t #1 Press ure Tr ans duc er Model Dependent, See Wiring Diagram
Inpu t #2 Tem per atu re Sen sor Dr y C ont act Closure
Inpu t #3 Dry Co nta ct Cl osu re Not Avai lab le
Ou tpu t #1 PWM*, 24…2 50VAC, 1A m a x
Ou tpu t #2 On /Of f, 24…2 50VAC, 1A m a x (Al arm)
Ou tpu t #3 4-20 mA @ 24V DC
Tempe rat ure 32…122 º F (0…50 º C)
Humidity < 95% r. H. no n-co nde nsi ng
conform ac cor din g
to EMC S t and ard
89/3 36/E EC EMEI
St and ard 73/2 3/E EC
De gre e of Pr ote cti on NE MA1, IP30 to EN 60-5 29
Sa fe t y Cla s s I1 (IEC 60 5 36)
Cover, ba ck pa r t Fire p r oof A BS pl ast ic (U L94 cl ass V-O)
Di men sio ns (H xWx D) 2. 4x 3.7x3 .7 ˝ (60x 93x 93 (110*) mm)
Weig ht (i ncluding pack age) 8. 5 oz ( 240 g)
EN 61 000 - 6 -1/ E N 61 0 0 0 - 6 -3
PX VC-P, PX VC -T, PX VC - C I ,
PX VC-D X , PX VC-L
DIMENSIONS
(IN, MM)
MECHANICAL DESIGN AND INSTALLATION
The control ler may be mounted in any orien tation by
sur face moun tin g on a wal l or in a cab ine t.
When mounting note th e following
• The controller should not be freel y accessible af ter
mounting. A protective h ousing mu st be use d if
mounted ou tside.
PXVC
MAY 2012
• Ensure adequ ate air cir culation to di ssipate heat
gener ate d during ope rati on.
• Local installation reg ula tions mus t be obser ved.
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DISPLAY AND KEYPAD OPERATION
DISPLAY
INDICATOR
PXVC-PT
SUPERHEAT/
SUBCOOLING
TEMPERATURE
SETPOINT
TEMPERATURE
ACKNOWLEDGED
ALARM (S)
PIN #1
DISPLAY
INDICATOR
SYSTEM
PRESSURE
(PSIA)
1 2
20.6 °F
19.2 °F
1 2 3 4 5 6 (ALARMS)
1 2
50.8 P
32.0 °F
OUTPUT ON %
OUTPUT ON %
SYSTEM
TEMPERATURE (OR)
1 2 3 4 5 6 (ALARMS)
ACTIVE ALARM
ACKNOWLEDGED
ALARM (S)
PIN #11
PXVC-PT FUNCTION KEYS
• Center (POW ER) Key: Press > 2 se conds to TU RN OFF t he contro lle r; Remote Inte rlock must b e disa bled.
Param ete r Setting: E NTER to sel ect menu option and AC CEPT p arameter c hange.
• UP Key: Increase SETPOINT. Parameter S etting: SCROLL menu options and para meters.
• DOW N Key: Decrease S ETPOINT. Par a meter Set ting: SCR OLL menu op tions and parame ter s.
• Right (OP TIO NS)Key: Ack now ledge alar m conditi ons . A larm message dis able d for 15 se conds, pri orit y 1– 6.
Param ete r Setting: E nte r to select me nu options, and ACC EPT par ameter ch ange.
• Lef t (ES C) Key: Toggl e between sc reen s 1 a nd 2. Pa rameter Setting: Escape, menu option, disca rd
parameter s etti ng.
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PXVC
MAY 2012
PXVC-PT
JUMPER CONFIGURATION
Ju mpers are mo u nted ver t icall y o nly. Jumpe r s a r e
lo cated on th e back sid e of the cont r olle r. Facto r y
de fault s .
1. UI1 – Selection o f input sig nal type:
(Pres sure Trans ducer)
• Middle pos ition: current input (0…20 mA), fa ctor y
defau lt 4 -20 mA
2. UI2 – Sele ction of in put si gnal t y pe:
(Tempe rature Tra nsducer )
• Right position: RT dr y-conta ct input, fa cto r y
defau lt is RT
2. UI3 – Se lection o f input signal type: (Interloc k)
• Right position: RT dr y-conta ct input, fa cto r y
defau lt is dry con tact
4. AO1 – * Selection of the analog output signal (optional
4-20mA output for SMV valve control)
• Left position: 0…20m A a nalog output, f actor y
defau lt is 4-2 0 mA
*Not normall y used with Pulse Width Modulation control
SELECTION OF CONTROL VALVES
AND SENSORS
Temperature Probe
• TS2, temperature sensor, PT-1000, length 2˝ with
6.5´ cable
• IMW, temperature probe immersion well, length 4˝
Pressure Transdu cer
• PT2, pressure transducer, -14.7–85 psig, 24VDC,
4-20mA output
• PT3 pressure transducer, -14.7–285 psig, 24VDC,
4-20mA output
PXV Control Valves
• Hansen PX V5, PXV15 or PXVW60
• Hansen HMMR / V, HA4AM, HA4AQ
POWER FAILURE
Upon power-interruption, all parameters and set-points
are memorized in non-volatile memory, and therefore do
not have to be re-entered.
ERROR MESSAGES
Err1: Temperature se nsor f aul t y or mis sing.
Er r 3: A fu nction refers to a disa bled input. Disa ble
the fun ction or enable the input.
Er r4: Failure of an interna l compone nt req uire d for
opera tion. Pro duc t must be r eplaced.
ELECTRICAL CONNECTIONS
In an extremely impai red EMC environm ent use only
shielded ca ble s for in put/ou tput c onnecti ons.
Us e sa f et y i n sul a tin g tr a ns f o rm e rs w i th d o ub le
in sulat i on; they mus t be desi gned for 10 0% ON-tim e.
No PWM contro l for VD C coils.
OPTIONAL REMOTE INTERLOCK
The remote interlo ck is des igne d to disab le flow thru
the PXV5, PXV15 or PXVW60 va lve whe n th e in ter lock
is connected to an externa l dr y conta ct, nor mally open
devi ce, su ch as a th ermostat or sh ut-down switch . Preprogrammed on input pins (15, 16). Disconnecting power
to the contr oll er for the pur pose of disabling flow is no t
re com mended.
PXVC
MAY 2012
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