Sporlan Superheat User guide

SUPERHEAT CONTROLLER - Installation and Servicing Instructions

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Power Input 24 VAC 40 VA

50/60 HZ

Panel Display Jack

Two Digit Display

Two Set Point Pushbuttons

One Valve Input

One Digital Input

One Pressure Input

Green Status LED

Red Status LED

Holders for Optional

Fail-Safe Batteries

Two Temperature Inputs

The Superheat controller was designed as a simple and eco-

nomical means of controlling an Electric Expansion Valve on

almost any refrigeration or air conditioning system. Sporlan

Valve can supply a complete package of valve, controller,

temperature sensor and pressure transducer. Pressure-temper-

ature superheat control for one of five common refrigerants

may be selected. Controllers can be ordered configured for R-

22, R-134a, R-404A, R-507 and R-407C. The refrigerant type

can be changed in the field by use of the optional "Panel

Display". Onboard readouts show actual superheat, superheat

set point, and valve position. Two push buttons are provided

on the board, to change the superheat set point, as well as

open, close, or position the valve. Proportional and Integral

set points are included to tune the controller for best

performance.

As illustrated, the controller is provided with hardware and input/output connections for a number of user speci-

fied purposes. See below:

• One valve control

• One pressure input (transducer supplied by Sporlan or customer)

• One digital input (from external switches or relays)

• Two temperature inputs (Sporlan supplied surface or air sensors)

• Optional battery backup for onboard clock and fail-safe valve closure

• Two digit LED readout

• Green & red LED status indicators

• Two push buttons for setting superheat alarm cancellation, etc.

• Panel Display jack

INSTALLATION

When handling the boards, electrostatic protection proce-

dures should be followed. The installer should be ground-

ed through a ground strap. If ground straps or other ESD

protection is not available, handle the board only by the

edges of the board. Another safe place to hold the board

is by the battery holders. DO NOT TOUCH ANY COM-

PONENTS ON THE BOARD EXCEPT THE BATTERY

HOLDER OR RELAYS.

1) The board should be mounted in a dry, protected environ-

ment using the mounting holes in each corner. Make sure

none of the printed circuit paths or components are touching

the metal panel or any conductive material.

2) If only one valve is used, connections are to be made to ter-

minal block closest to display readout and push buttons PB1

and PB2.

3) Controllers are configured for pressure temperature

superheat .

4) Connect temperature sensor to TS2. The sensor is not

polarized. With the clamps furnished, the sensor should be

mounted to the suction line after the evaporator.

5) The pressure transducer should be mounted on the suction

line near the temperature sensor location. The transducer con-

nections to the board are shown:

The power wire is red and is connected to the 1+ terminal

The signal wire is green and is connected to the 1S terminal

The ground wire is black and is connected the 1- terminal

6) DI1 is a digital input used as a pumpdown terminal. A

short or closed contact from an external relay will close the

valve for pumpdown. When the relay opens or the short is

removed, the valve will return to normal operation.

7) Power is connected to the terminal marked 24VAC. Power

requirements are 24 volts AC at 40 VA. For protection from

electrical transients, connect one MOV varistor between one

leg of the input voltage of the 24 VAC transformer and earth

ground. Connect a second MOV varistor between the other

leg of the input voltage of the 24 VAC transformer to earth

ground. A recommended part number for a MOV is Harris

Semiconductor part number V150LA20A for 120 VAC input,

or part number V275LA20A for 208/240 VAC input.

OPERATION

When first powered up the numeric display will show actual

superheat.

1) The small Green LED will be lit.

2) PB2 will toggle the readings as follows and the small

Green LED will be steady or flash:

•Actual Superheat, LED constant.

•Valve percentage open, LED slow flash.

3) To change set point for superheat:

•Make sure the display shows the superheat.

•Press and hold PB1 and PB2 for 8 seconds, LED will

flash rapidly.

•Use PB1 to increment set point.

•Use PB2 to decrement set point.

•Press and hold PB1 and PB2 for 5 seconds to lock in

set point and return to actual superheat.

4) To manually change valve position, scroll to valve position

reading with PB2.

•Press and hold PB1 and PB2 simultaneously for 8

seconds, Green LED will flash rapidly.

•Increment "valve open" percentage by pressing PB1

for 1 second.

•Decrement "valve open" percentage by pressing PB2

for 1 second.

•Valve will maintain manual open position for 1 hour or

until PB1 and PB2 are pressed simultaneously and

held for 5 seconds.

REMOTE PANEL DISPLAY

Aremote panel display is available that will allow access to

all the parameters that the controller uses. The Remote Panel

Display can be used as a set point tool in production, a diag-

nostic tool in the field or as a permanent readout device on the

controller. A five foot cable is included.

Plug the remote display into the telephone jack (J9) on the

controller. The following is a list of readings available.

SUPH -Superheat read by controller

POSN -Number of steps valve is open (0-1596, 0-3192

or 0-6386)

PRES -Pressure read by the transducer (0-153 psi

absolute or gauge)

TEMP -Temperature read by the temperature sensor (-40

to 102°F)

TSAT -Saturated temperature calculated from pressure.

ACON, PMDN -ACON when in normal operation, PMDN when

in pumpdown

R22, 134A, 407C,

404A, R507 -R22 for regfrigerant R22, 134A for refrigerant

R134a, 407C for refrigerant R407C, 404A for

refrigerant R404A, and R 507 for refrigerant

R507.

LRGE, SMAL,

MEDM -LRGE if the EEV used is an SEI-50 or larger.

SMAL if the EEV used is smaller than an SEI-25.

MEDM if the EEV used is an SEI-25

SHSP -Superheat set point (0 to 16 deg F). Default is 10

deg F.

MOPD -Maximum operation suction pressure set point (0

TO 153 PSI). Default is 153 PSI.

CTSP -Cut out suction pressure set point (0 TO 153 PSI)

CALP -Calibrate pressure transducer

CALT -Calibrate temperature sensor

PROP -Proportional gain set point. Number of steps per

degree that superheat is above or below the super-

heat set point (5 to 255 steps per degree). Default

is 45.

INTG -Integral set point. Number of seconds the con-

troller waits to update the reference valve posi-

tion. (1 to 120 seconds). Default is 10 seconds.

PANEL DISPLAY

Pressing ‘ENTER’ will toggle display between one of the

displays described above and the numeric value read for that

particular display. Pressing ‘UP’ will scroll through the menu

from ‘SUPH to ‘POSN’, etc. Pressing ‘DOWN’ will scroll

through the menu the opposite way.

When in ‘POSN’, press and hold ‘UP’ button and ‘ENTER’

button simultaneously for 5 seconds to put the controller in

manual valve position. The number of steps open will be dis-

played and the 1000’s digit will blink. Pressing the ‘UP’ but-

ton will open the valve 1000 steps. Pressing the ‘DOWN’

button will close the valve 1000 steps. Pressing the ‘ENTER’

button will change the flashing digit from 1000’s digit to the

100’s digit. Pressing the ‘UP’ button will open the valve 100

steps. Pressing the ‘DOWN’ button will close the valve 100

steps. Pressing the ‘ENTER’ button will change the flashing

digit from 100’s digit to the 10’s digit. Pressing the ‘UP’ but-

ton will open the valve 10 steps. Pressing the ‘DOWN’

button will close the valve 10 steps. Pressing the ‘ENTER’

button will change the flashing digit from 10’s digit to the 1’s

digit. Pressing the ‘UP’ button will open the valve 1 step.

Pressing the ‘DOWN’ button will close the valve 1 step.

Pressing the ‘ENTER’ button will change the flashing digit

from 1’s digit to the 1000’s digit. Press and hold ‘UP’ button

and ‘ENTER’ button together for 5 seconds to put the con-

troller in normal control. The digits will stop blinking.

When in ‘SHSP’, press and hold ‘UP’ button and ‘ENTER’

button for 5 seconds to enable the superheat set point to be

changed. The set point is displayed and the 100’s digit will

blink. Pressing the ‘UP’ button will increase the set point by

100 degrees. Pressing the ‘DOWN’ button will decrease the

set point by 100 degrees. Pressing the ‘ENTER’ button will

change the flashing digit from 100’s digit to the 10’s digit.

Pressing the ‘UP’ button will increase the set point by 10

degrees. Pressing the ‘DOWN’ button will decrease the set

point by 10 degrees. Pressing the ‘ENTER’ button will

change the flashing digit from 10’s digit to the 1’s digit.

Pressing the ‘UP’ button will increase the set point by 1

degree. Pressing the ‘DOWN’ button will decrease the set

point by 1 degree. Pressing the ‘ENTER’ button will change

the flashing digit from 1’s digit to the 100’s digit. Press and

hold ‘UP’ button and ‘ENTER’ button together for 5 seconds

to save the set point. The digits will stop blinking.

When in ‘MOPD’, pressing and holding ‘UP’ button and

‘ENTER’ button for 5 seconds will enable the Maximum

operating suction pressure set point to be changed. The set

point is displayed and the 100’s digit will blink. Pressing the

‘UP’ button will increase the set point by 100 PSI. Pressing

the ‘DOWN’ button will decrease the set point by 100 PSI.

Pressing the ‘ENTER’ button will change the flashing digit

from 100’s digit to the 10’s digit. Pressing the ‘UP’button will

increase the set point by 10 PSI. Pressing the ‘DOWN’ but-

ton will decrease the set point by 10 PSI. Pressing the

‘ENTER’button will change the flashing digit from 10’s digit

to the 1’s digit. Pressing the ‘UP’ button will increase the set

point by 1 PSI. Pressing the ‘DOWN’ button will decrease

the set point by 1 PSI. Pressing the ‘ENTER’ button will

change the flashing digit from 1’s digit to the 100’s digit.

Press and hold ‘UP’button and ‘ENTER’button for 5 seconds

to save the set point. The digits will stop blinking.

When in ‘CTSP’, pressing and holding ‘UP’ button and

‘ENTER’ button for 5 seconds will enable the cut out suction

pressure set point to be changed. The set point is displayed

and the 100’s digit will blink. Pressing the ‘UP’ button will

increase the set point by 100 PSI. Pressing the ‘DOWN’but-

ton will decrease the set point by 100 PSI. Pressing the

‘ENTER’ button will change the flashing digit from 100’s

digit to the 10’s digit. Pressing the ‘UP’ button will increase

the set point by 10 PSI. Pressing the ‘DOWN’ button will

decrease the set point by 10 PSI. Pressing the ‘ENTER’ but-

ton will change the flashing digit from 10’s digit to the 1’s

digit. Pressing the ‘UP’ button will increase the set point by 1

PSI. Pressing the ‘DOWN’ button will decrease the set point

by 1 PSI. Pressing the ‘ENTER’button will change the flash-

ing digit from 1’s digit to the 100’s digit. Press and hold ‘UP’

button and ‘ENTER’ button for 5 seconds will save the set

point. The digits will stop blinking.

NOTE: ‘CTSP’ set point is used to help stop nuisance, low

suction pressure trips of the compressor. If the suction pres-

sure goes below this set point, and the superheat is above the

superheat set point, the valve will keep opening until the suc-

tion pressure is above this set point or the superheat is below

its set point. The controller will start controlling superheat

from this valve position. If the superheat is below its set point

and the suction pressure is below this set point, the controller

will change this set point to 12 PSI below whatever the cur-

rent suction pressure is. This is not saved. If power is lost,

the original saved set point is again used.

When in ‘CALP’ or ‘CALT’, the numeric display shows the

PSI or degrees to be either added or subtracted from that par-

ticular sensor, depending if the reading is negative or positive.

Pressing and hold ‘UP’button and ‘ENTER’ button for 5 sec-

onds will enable that sensor to be calibrated. The CAL num-

ber is displayed and the 10’s digit will blink. Pressing the

‘UP’ button will increase the CAL number by 10 PSI or

degrees. Pressing the ‘DOWN’ button will decrease the CAL

number by 10 PSI or degrees. Pressing the ‘ENTER’ button

will change the flashing digit from 10’s digit to the 1’s digit.

Pressing the ‘UP’ button will increase the CAL number by 1

Remote Panel

Display

PRINTED IN THE U.S. OF A. SD-257-902

PSI or degree. Pressing the ‘DOWN’ button will decrease the

CAL number by 1 PSI or degree. Pressing the ‘ENTER’ but-

ton will change the flashing digit from 1’s digit to the 0.1’s

digit. Pressing the ‘UP’ button will increase the CAL number

by 0.2 PSI or degree. Pressing the ‘DOWN’ button will

decrease the CAL number by 0.2 PSI or degree. Pressing the

‘ENTER’button will change the flashing digit from 0.1’s digit

to the 10’s digit. Press and hold ‘UP’ button and ‘ENTER’

button for 5 seconds to save the CAL number. The digits will

stop blinking.

When in ‘PROP’, press and hold ‘UP’ button and ‘ENTER’

button for 5 seconds will enable the proportional gain set

point to be changed. The set point is displayed and the 100’s

digit will blink. Pressing the ‘UP’ button will increase the set

point by 100 steps per degree. Pressing the ‘DOWN’ button

will decrease the set point by 100 steps per degree. Pressing

the ‘ENTER’button will change the flashing digit from 100’s

digit to the 10’s digit. Pressing the ‘UP’ button will increase

the set point by 10 steps per degree. Pressing the ‘DOWN’

button will decrease the set point by 10 steps per degree.

Pressing the ‘ENTER’ button will change the flashing digit

from 10’s digit to the 1’s digit. Pressing the ‘UP’ button will

increase the set point by one step per degree. Pressing the

‘DOWN’ button will decrease the set point by one step per

degree. Pressing the ‘ENTER’ button will change the flash-

ing digit from 1’s digit to the 100’s digit. Press and hold ‘UP’

button and ‘ENTER’button together for 5 seconds to save the

set point. The digits will stop blinking. The proportional set

point should be left at the default setting unless an unaccept-

able system hunt is experienced. The proportional set point

may be raised to dampen the hunt, but actual system per-

formance should be monitored determine the effect.

When in ‘INTG’, press and hold ‘UP’ button and ‘ENTER’

button for 5 seconds to enable the integral set point to be

changed. The set point is displayed and the 100’s digit will

blink. Pressing the ‘UP’ button will increase the set point by

100 seconds. Pressing the ‘DOWN’ button will decrease the

set point by 100 seconds. Pressing the ‘ENTER’ button will

change the flashing digit from 100’s digit to the 10’s digit.

Pressing the ‘UP’button will increase the set point by 10 sec-

onds. Pressing the ‘DOWN’button will decrease the set point

by 10 seconds. Pressing the ‘ENTER’button will change the

flashing digit from 10’s digit to the 1’s digit. Pressing the ‘UP’

button will increase the set point by 1 second. Pressing the

‘DOWN’ button will decrease the set point by 1 second.

Pressing the ‘ENTER’ button will change the flashing digit

from 1’s digit to the 100’s digit. Press and hold ‘UP’ button

and ‘ENTER’ button together for 5 seconds to save the set

point. The digits will stop blinking. The integral set point

should be left at the default setting unless valve response is

sluggish. Lowering the set point will make the valve more

responsive but system performance should be monitored to

ensure proper response of the valve.

If display reads one of the refrigerants, press and hold ‘UP’

button and ‘ENTER’ button simultaneously for 5 seconds to

enable the controller to change to another type of refrigerant.

All four digits will start to blink. Pressing the ‘UP’ button or

the ‘DOWN’ button will change the display to other refriger-

ants. When the display shows the desired refrigerant, press

and hold ‘UP’ button and ‘ENTER’ button together for 5 sec-

onds. The controller will save and use that refrigerant’s table

for saturated temperature. The digits will stop blinking.

If display reads ‘LARG’, ‘SMAL’, or ‘MEDM’, press and

hold ‘UP’button and ‘ENTER’button for 5 seconds to enable

the controller to change to the other type of valves. All four

digits will start to blink. Pressing either the ‘UP’button or the

‘DOWN’button will change the display between the different

valve types. Press and hold ‘UP’ button and ‘ENTER’ button

together for 5 seconds to save the selection. The digits will

stop blinking.

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