MasterStat 110423-2 User Manual

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Installation Instructions

CAUTION: Failure to read and follow all installation and operating instructions could lead to personal injury and/

or damage to property.

CAUTION: All electrical installations must comply with local building and safety codes and must be performed by

qualied personnel only.

System Overview

• Thiscontrolsystemisintendedtobeusedwithanevaporativecoolerwitha2-speedblowerandawaterpump.Itwillalsooperatea

waterpurgepumporvalve,ifequipped.

• Thecontrolisdesignedforfanmotorsupto1HP(120V)or2HP(240V),withwaterpumpandpurgepumpupto2A(120V)or1A

(240V)

• Thefanmotormaybe120Vor240Vrated.

• Thewaterpumpandpurgepumpmotors/valvessharethesameelectricalsupply,ratedfor120Vor240V.

Included in Kit

• WallControlThermostat

• 2-SpeedEvaporativeCoolerControl

• WireNutforcommonEarthconnection.

• Spare3.15Ampfuseforcontrol.

• JumperwireforLinktoN-Link(TobeusedonlywhenbothFanandPumpvoltagesarethesame).

Additional Requirements

Dependingonapplicationandinstallation,thefollowingadditionalitemsmayberequired:

• ScrewsorboltsformountingtheApplianceControlBoxandWallControl

• WiringforconnectionbetweenpowersupplyandApplianceControlBox;WallControlandApplianceControlBox;andbetween

ApplianceControlBoxandthecoolerconnectionbox.

• Conduitandwatertightconnectorstoprotectallwiring.

Installation of the Appliance Control Box

CAUTION: To prevent electrical shock and/or damage to the equipment, disconnect electrical power to the system at

the main fuse or circuit breaker before starting the installation, and leave disconnected until the installation is complete.

1) AfterdeterminingasuitableplacetoinstalltheApplianceControlBox,markthelocationofthethreemountingpoints(withthe

‘TOP’indicationuppermost)anddrillpilotholesforthemountingscrews.

2) Determinewhichknockoutlocationswillbeusedforthesystemwiring.

3) Usingasuitabletool,cutouttherequiredknockouts.Makesureyoucutoutthe

correctsizeholeforyourtting.

4) Mounttheboxusingsuitablescrews.

5) Installconduitandconnections,ensuringawatertightseal,especiallyaroundthe

locationswheretheknockoutswereremoved.

6) Runwiring,inaccordancewithlocalandnationalelectricalcodes,tosuitthe

installation.

7) Connectthewiresinaccordancewiththewiringdiagramonnextpage(wiring

diagramalsolocatedontheinsidelidofApplianceControlbox).

 WARNING: Use the jumper wire between Link and NLink only

when fan and pump voltages are the same.

Wall Control Thermostat and 2-Speed Evaporative Cooler

Control System • Model 110423-2

Questions and Answers:

C
catherine03Aug 11, 2025
What to do if the MasterStat Thermostat fan motor doesn't work or has issues with fan speed?
- E
  elizabeth35Aug 11, 2025
  If the MasterStat Thermostat fan motor isn't working, or you're experiencing issues with fan high or low operation, the first thing to check is the LCD display for a flashing 'Pre-Wet' indicator. This means the fan is off until the pre-wet cycle completes. Also, make sure that the fan motor leads are correctly connected to the Fan Hi, Fan Lo, and N connection screw terminals on the Appliance Control Board. Verify that the colors of the thermostat cable match the color description on the Appliance Control Board and that all wires are firm and secure. Finally, confirm that the jumper wire across “Link” and “Nlink” is connected properly. Note: Use the jumper wire only when fan and pump voltages are the same.
V
Vickie RussoAug 20, 2025
What to do if the MasterStat 110423-2 water or purge pump doesn't work, even though the LCD indicates it's on?
- A
  annaphelpsAug 20, 2025
  If the MasterStat Thermostat water or purge pump isn't working but the LCD on the wall control indicates it's on, first check the water pump terminals on the appliance control board to ensure they are correctly connected. Also, verify that the thermostat cable colors match the color description on the appliance control board and that all wires are firm and secure.

MasterStat 110423-2 Specifications

General

Brand	MasterStat
Model	110423-2
Category	Thermostat
Language	English

MasterStat 110423-2 User Manual

Questions and Answers:

MasterStat 110423-2 Specifications

Summary

Installation Instructions

System Overview

Included in Kit

Additional Requirements

Installation of the Appliance Control Box

Wiring Connections in Appliance Control Box

Installation of the Wall Control - cavity wall without outlet box

Installation of the Wall Control - using an existing wall-mounted outlet box

Operating Instructions

Automatic Operation

Manual Operation

Time Delay Operation

In the event of a power outage

Trouble Shooting Guide

Diagnostic Test for Appliance Control Board