Zero Zone Kelvin II Installation Manual

SD-324

Sporlan Kelvin II
Refrigeration Controller

User’s Manual, November 2009

Page 1

1

24 VAC

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

19

36

35

34

33

32

31

30

29

28

27

26

25

24

23

22

21

20

24 VAC

N/C

N/C

N/C

N/C

N/C

Ground

RS-485 A+

RS-485 B-

N/C

N/C

N/C

Load

Line

N/C

N/C

N/C

N/C

N/C

N/C

T3-

T3+

T2-

T2+

T1-

T1+

PWR

Room

Tout

RS485

Valve

LL Sol

N/C

Pressure

Aux

SER, SEI, SEH ESX

Red Black

Green Red

White Yellow

Black Orange

N/C Gray

Black

Green

White

+5VDC

Ground

Sense

Description

The Kelvin II is a standalone superheat controller. The Kelvin
II may be connected with a MODBUS master or a Network
Master to give remote access to pressure and temperature
readings in addition to viewing and editing the controller’s
setpoints. The user can also take advantage of the easy to use
local display or a Remote Display to accomplish the same
tasks.

1. Kelvin II Configuration

Specifications

n Input Voltage: 24 VAC (± 10%), 40 VA minimum to board

with external transformer

n Operating ambient temperature: -40°F to 120°F
n LED: One Power LED
n Communications: 1 RS485 Port, 1 USB port

(Not operational)

n 4 Digit 7 segment display
n Inputs:

– Optical Encoder (Knob)
– One Pressure Input
– Three Temperature inputs

n Valve Control of all Sporlan Electric Expansion Valves

“EEV”

n 3 amp Solid State Relay for Liquid Line Solenoid Kelvin II

w/o Local Display

n 1 amp Solid State Relay for Liquid Line Solenoid Kelvin II

w/Local Display

2. Kelvin II Connections

The Kelvin II has screw terminals on the each side of the
controller. The controller should be wired as follows and as
shown in Figure 1.

Figure 1

Item Wire (line)

Power

Valve

RS-485

Liquid Line Solenoid

Auxiliary Temperature Sensor
(Displayed menu item: S-3)

Room Temperature Sensor
(Displayed menu item: CtP)

Coil Out Temperature Sensor
(Display option: tout)

Pressure Transducer
(Displayed menu item: SucP)

24VAC 1
24 VAC 2
SEI, SER, SEH ESX —
N/C Gray 4
Black Orange 5
White Yellow 6
Green Red 7
Red Black 8
Ground 13
A+ 14
B- 15
Line 19
Load 20

T3

T2

T1

Sense (WHITE) 33
Ground (GREEN) 34
+5 VDC (BLACK) 35

Kelvin II

connect point

27
28
29
30
31
32

3. Kelvin II Display

Upon the rst power-up from Sporlan, the Kelvin II will en­ter the setup menu. This menu allows the user to set some
critical setpoint values, seen in Table 1, before the controller
will operate. These critical values can be set via the local or
remote displays, MODBUS, or Network Master. (Note: Only
the Valve Type and Refrigerant have to be set via MODBUS
or Network Master for the controller to operate) Once these
values are entered the Kelvin II will then begin its control. If
the setup menu is displayed on the local or remote displays