This document provides technical specifications and wiring information for the Balboa Instruments VS503SZ system. Key details include: - The system model is a VSP-VS503SZ-DCAH with software version 43. - It lists the main PCBA, PCB, and base panel part numbers. - Wiring diagrams and descriptions are provided for the standard configuration including power requirements, outputs, optional devices, and dip switch settings. - Instructions for resetting persistent memory and details on time of day retention are included. - Guidelines are given for ozone connections and changing the voltage output.

1. VS503SZ Tech Sheet
Balboa Instruments
System PN 54635-01
System Model # VSP-VS503SZ-DCAH
Software Version # 43
EPN # 2808
Base PCBA - PN 54363-01
PCB VS500Z - PN 22972 Rev C or D
Base Panels
VL701S (Serial Standard) – PN 52298-01
Template used: 40600_R.pdf 04/16/2008
54365-01_A.pdf 08/26/2008
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2. System Revision History
System PN EPN Date Requested By Changes Made
54635-01 2808 08.26.2008 Balboa Software update to version 43.
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3. Basic System Features and Functions
Power Requirements
System Outputs
Setup 1 (As Manufactured)
(Stereo)
Optional Devices
FUSE
Additional Options K8 W2
K5
W3
J1 J1A
J10
J2A
J18
2 3
1
U4 J12
J2
J13
BALBOA INSTRUMENTS, INC. 2-SPD
J60 J22 J44 VS500Z EXT RLY
J7 J8
P/N 22972 REV D
EXT. AUX. F VAC MADE IN U.S.A
RLY SEN. A SEN. B COPYRIGHT 2005
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4. Basic System Features and Functions
Any time you change a DIP Switch, other than A1, you must reset Persistent Power Up Display Sequence
Memory for your new DIP Switch Settings changes to take effect. If you do Upon power up, you should see the following on the display:
not reset Persistent Memory, your system may function improperly. Three numbers in a row, which are the SSID (the System Software
ID). The third display of these numbers is the Software Version,
To reset Persistent Memory: which should match the version of your system. For example, if these
Power down by disconnecting power source from spa. three numbers are , that is a VS511SZ at version 38.
Put a jumper across J43, covering both pins. (See illustration below) Displayed next is: “ ” (indicating the system is configured for
Power up by connecting power source to spa. a heater between 3 and 6 kW) or “ ” (indicating the system is
Wait until “ ” is displayed on your panel. configured for a heater effectively* between 1 and 3 kW).
Power down again. “ ” should appear for all VS models running at 240VAC.
Remove jumper from J43 (May also move to cover 1 pin only) “ ” should appear for all VS models running at 120VAC, as well
as all GS models. (*A heater which is rated at 4 kW at 240VAC will
Power up again.
function as a 1 kW heater at 120VAC.)
“ ” will appear to signal the start of Priming Mode.
About Persistent Memory and Time of Day Retention:
This system uses memory that doesn’t require a battery to store a variety of
At this point, the power up sequence is complete. Refer to the Reference
settings. What we refer to as Persistent Memory stores the filter settings,
Card for the VS or GS System model of your spa for information about how
the set temperature, and the heat mode.
the spa operates from this point on, including how to adjust the Time of
Day if using a Serial Deluxe style panel.
Persistent Memory is not used for Time of Day. Only models with a
Serial Deluxe panel installed (VS5xxDZ and GS5xxDZ) can display the
time. However, during power loss to the spa, the system will lose the
correct time, and reset to 12:00 PM when power is restored.
J43
TST RST
FUSE 20A 250V J47 J6 J43
J46
F7 J29
K6 J23 J50 PUMP OZONE
K1 J23 J29
F1 F5, F3A 250V J20
J20
J17/26
J6
E.GND
G
G
K5
J90
G C
C
C
FUSE 3A 250V
C
C
C
C
C
C
S1 TST
G
G
G
J50
W7
W4
G
G
G
J12
W1 K8 K5
F4 FUSE .3A 250V
SWITCHBANK A
T1 K9 W3
W2 K4 K1
SWITCHBANK A
J1 J1A
J10
J18
F2 U4
J13
J2A T0.25A 250V
NEUTRAL
WHT AC J1
J18
W1 J58 J57
1 2 3
K3 K3
U4 J12
K2
J2
VS100
P/N 22964_B MADE IN U.S.A.
J26 F4
Balboa
J43
© 2006
F2 LINE
K2
J13 TST RST
BLK AC
BALBOA INSTRUMENTS, INC. 2-SPD S1 J6 J43
J60 J22 J44 VS500Z EXT RLY
J6 J7 J8 J7 J8
E.GND
P/N 22972 REV D
J9
S1 TST EXT.
T AUX. F VAC MADE IN U.S.A
V
SWITCHBANK A RLY
L SEN. A SEN. B COPYRIGHT 2005 HEATER
A
SWITCHBANK A SEN. A SEN. B
J43 on VS5xxZ and VS300 Series Main Board Shown. J43 on VS100/GS100 Series Main Board Shown.
J43 on GS5xxZ Series is located in approximately the same position.
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5. Wiring Configuration and DIP Settings
Setup 1 (As Manufactured)
(Stereo)
PCBA rev D only.
Black jumper required. Ozone and Circ Pump must be same voltage.
Do not remove. DIP switch A9 must be ON if Circ Pump is installed.
K1 F7 FUSE 20A 250V J47
J46
W10 J29
CLASS G FUSE 30A BLK AC K6 J23 J50
F5 J61 J62 J74
Circ.Pump
F1
Audio Visual
2-Spd P1 J20
J17/26
Ozone
FUSE 3A 250V
WHT AC
T
C
J73
Light
C
12V
C
C
C
C
G
G
G
W7
W4
G
G
G
J11 J15 J16 J25 J63 J64
J66 J65
W1 K8 K5
W2
T1 K9 W3
NEUTRAL
F4 FUSE .3A 250V
J1 J1A
WHITE
J10
BLACK
HOT
J2A
VS5xxS mode
J18
TORQUE
RANGE
RED
HOT
2 3
FOR TB1: K3 1
K4 27-30 IN. LBS. U4 J12
K2
TB1 J2
J32 J33 J34 J35 J43
J36 J37 F2
RED AC J13
BALBOA INSTRUMENTS, INC. 2-SPD
J60 J22 J44 VS500Z EXT RLY
J7 J8
Balboa HTR2 HTR1 J6
E.GND
P/N 22972 REV D
J100 J101 S1 TST EXT. AUX. F VAC MADE IN U.S.A
SWITCHBANK A RLY SEN. A SEN. B COPYRIGHT 2005
Heater rated @ 240V
5.5 kW (Approx. 1.25kW @ 120V)
WARNING: Main Power to system should be turned OFF BEFORE adjusting DIP switches.
WARNING: Persistent Memory (J43) must be RESET to allow new DIP switch settings to take effect. (See Persistent Memory page)
VS51x/VS5xxS/VS5xxD
SSID # Compatible
Wiring Color Key
120 Volt Connections
100 J12 240 Volt Connections
93 1 2 3 Black AC Jumpers
43 12 Volt Connections
A1, Test Mode OFF
Relay Control Wires
A2, See Table 1 A7, Exp Board Equip Disabled
A3, J17/26 Pump Disabled J43 Board Connector Key
Memory
A9, Non-Circ Mode
A5, 2-speed P1 Reset 1 Typically Line voltage
A10, See Table 1
2 Typically Line voltage for 2-speed pumps
Panel Button Assignments Panel Button Positions 3 Neutral (Common)
1=Mode 5=Pump 1 2 7 4
4 1 2 4 Ground
2=Temp Up 6=Unused
1 3 5 6
3=Temp Down 7=Unused 5 6 7 3
Note flat sides in connector
4=Light
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6. DIP Switches and Jumpers Definitions
SSID 100 93 43 Base Model VS503SZ-VS504SZ-VS514SZ
DIP Switch Key
A1 Test Mode (normally OFF)
A2+A10 Control amp draw requirements (See Table 1) Table 1 # of Hi-Speed
A3 “ON” position: J17/26 Enabled for 1-speed Pump only. Pumps/Blower
“OFF” position: J17/26 Disabled. Before Heat Disabled
A4 Aux Freeze (must be OFF) A2 A10
A5+A9 Pump 1 speeds and Circ Modes: OFF OFF 0
A5 A9 Circ Mode Pump 1 Speed ON OFF 1
OFF OFF Non-circ 2-speed OFF ON 2
ON OFF Circ "acts like Pump 1 low" (filters/polls/ect) 1-speed ON ON 3
OFF ON 24 hours with 3°F shut-off 1-speed
ON ON 24 hours with 3°F shut-off 2-speed
A6 “ON” position: 50Hz operation
“OFF” position: 60Hz operation
A7 “ON” position: Expander Board Enabled for Blower or 1-speed Pump.
“OFF” position: Expander Board Disabled
A8 “ON” position: temperature is displayed in degrees Celsius
“OFF” position: temperature is displayed in degrees Fahrenheit
When using a Blower, use X-B expander board. When using a 1-speed Pump 3, use X-P or X-P231, depending on amperage requirements.
* Panel with button layout is not compatible.
Jumper Key
J12 Factory set. DO NOT MOVE.
Jumper must be on Pins 1 and 2 for VS51xZ/VS52xZ/VS5xxSZ/VS5xxDZ software.
Jumper must be on Pins 2 and 3 for VS50xZ software.
J43 When jumper is placed on 2 pins during power-up, system will reset persistent memory.
Leave on 1 pin only to enable persistent memory feature.
WARNING:
Setting DIP switches incorrectly may cause abnormal system behavior and/or damage to system components.
Refer to Switchbank illustration on Wiring Configuration page for correct settings for this system.
Contact Balboa if you require additional configuration pages added to this tech sheet.
Panel Button Positions Aux Panel Information
4 1 2 2 7 4 Supports 2-button aux panel
5 6 7 3 1 3 5 6
VX20 5 6 When A3 is ON
VX20 5 7 When A3 is OFF
Panel Button Assignments
1=Mode 5=Pump 1
Supports 4-button aux panel
2=Temp Up 6=Pump 2 (when A3 is ON)
3=Temp Down 7=Exp Board (when A7 is ON) VX40S 5 6 4 7
4=Light
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7. Ozone Connections
Ozone Connector Voltage: The VS500Z circuit board is factory configured to deliver a preset voltage (120V or
240V) to the on-board ozone connector (J29). See the ratings table on the wiring diagram attached to the cover
of the enclosure for the configured voltage. For 240V output W2 connects to Red AC and for 120V output W2
connects to White AC.
The voltage to the ozone connector can be changed in the field if required. W2 just needs to be set for the
required voltage.
WARNING: Changing the voltage of the ozone connector also effects the voltage supplied to the circ
pump connector (J47). Any equipment controlled by that connector may be damaged if the wrong voltage
is selected.
Balboa Ozone Generator: If the board is set up to operate a 120V ozone generator, the connector on the ozone
generator is likely to be configured correctly, but should be compared to the illustration below.
If a 240V ozone generator is required, be sure the red wire in the ozone cord is positioned in the connector next
to the green ground wire as described below.
Note: A special tool is required to remove the pins from the connector body once they are snapped in place.
Check with your Balboa Account Manager for information on purchasing a pin-removal tool.
Balboa Ozone connector configuration for 120V 60Hz B
Line - Black conductor
Use this slot for the leftover Red conductor
Common - Install the White conductor here for 120V ozone
G
Ground (Green) conductor
Flat sides of sockets as shown
Balboa Ozone connector configuration for 240V 60Hz B
Line - Black conductor
Use this slot for the leftover White conductor
Common - Install the Red conductor here for 240V ozone
G
Ground (Green) conductor
FUSE 20A 250V J47
J46
J29
Line - Black conductor
Circ.Pump
R
J20 F1 Use this slot for the leftover conductor
B
Common - Red for 240V or White for 120V ozone (See W2 wire)
Ground (Green) conductor
FUSE 3A 250V
W
Light
W
12V
W2 wire determines voltage
W
G
K8 K5
W2
W3
J1 J1A
J10
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8. Serial Standard Panel Configurations
Light Mode Warm
Heat
SETUP 1
Jets 1 Cool
VL701S (Serial Standard)
PN 52298-01 with No Overlay (Example shown)
Connects to Main Board terminal J1
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