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SC 1901
1-Stage Cool
Non-Programmable
Hardwired
Non-Programmable Electronic Thermostat
• Controls Single Stage Cooling Systems
• Compatible with A/C Systems
• 30-Minute Power Loss Memory Retention
• For use with 24 VAC Systems
Installation, Operation & Application Guide
For more information on our complete range of American-made
products – plus wiring diagrams, troubleshooting tips and more,
visit us at www.icmcontrols.com
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Summary of Contents for ICM Controls SC 1901
- Page 1 SC 1901 1-Stage Cool Non-Programmable Hardwired Non-Programmable Electronic Thermostat • Controls Single Stage Cooling Systems • Compatible with A/C Systems • 30-Minute Power Loss Memory Retention • For use with 24 VAC Systems Installation, Operation & Application Guide For more information on our complete range of American-made products – plus wiring diagrams, troubleshooting tips and more, visit us at www.icmcontrols.com...
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Page 2: Table Of Contents
Table of Contents Parts Diagram ..........................1 Specifications ..........................2 Important Safety Information ..................... 2 Package Contents/Tools Required ....................3 General Description ........................3 To Remove Existing Thermostat ....................4 To Install Thermostat ........................4 Replacing Wiring Labels ......................5 Operation ............................ -
Page 3: Parts Diagram
Parts Diagram Celsius/ Fahrenheit Jumper Reset Button Auto Cool Mode Switch Fan Switch... -
Page 4: Specifications
Specifications Input: • Voltage: 18-30 VAC Output: • Maximum: 1 amp per terminal (3 amp total for all terminals) Temperature Ranges: • Temperature control range: 45°F to 90°F (7°C to 32°C) Accuracy: ± 1°F (± 0.5°C) • Differential range: 1°F to 3°F (0.5°C to 1.5°C) Accuracy: ± 1°F (± 0.5°C) •... -
Page 5: Package Contents/Tools Required
Package Contents/Tools Required Package includes: SimpleComfort ® 1901 non-programmable thermostat on base, thermostat cover, wiring labels, screws and wall anchors, Installation, Operation and Application Guide Tools required for installation: Drill with 3/16” bit, hammer, screwdriver General Description 1901 thermostat is a hardwired, digital, mercury-free, non-programmable, •... -
Page 6: To Remove Existing Thermostat
To Remove Existing Thermostat ELECTRICAL SHOCK HAZARD – Turn off power at the main service panel by removing the fuse or switching the appropriate circuit breaker to the OFF position before removing the existing thermostat. 1. Turn off power to the heating and cooling system by removing the fuse or switching off the appropriate circuit breaker. 2. Remove cover of old thermostat. This should expose the wires. 3. -
Page 7: Replacing Wiring Labels
To Install Thermostat (continued) Mark the placement of the mounting holes. Set thermostat base and cover away from working area. Using a 3/16” drill bit, drill holes in the places you have marked for mounting. Use a hammer to tap supplied anchors into mounting holes. Align thermostat base with mounting holes and feed the control wires through wire opening. -
Page 8: Operation
Operation Setting the Room Temperature (Setpoint Temperature) Step 1: Press the button; the current temperature sepoint displays. Step 2: Press the button until the desired temperature sepoint displays. The new temperature setting is automatically saved. After 5 seconds, the display returns to showing the current room temperature. -
Page 9: A Quick Test
A Quick Test CAUTION!: Do not switch system to cool if the outdoor temperature is below 50°F (10°C). This can damage the air conditioning system and may cause personal injury. Action: Set the Mode switch to Cool. Press the button until the temperature setting is 3°F below the room temperature. -
Page 10: Wiring Diagram
Wiring Diagrams Cooling Only 4-Wire, Single Transformer Transformer 120 VAC 24 VAC Cooling Only Control... -
Page 11: Troubleshooting
Troubleshooting Symptom Remedy The system isn’t turning on Check the wiring (see Installation, Page 4) LCD is blank Check the wiring (see Installation, Page 4) Thermostat is not properly controlling the fan Check the wiring (see Installation, Page 4) Thermostat is continuously turning on and off Increase the temperature differential (see Setting a New Temperature Differential, Page 6) Temperature display is not accurate... - Page 12 ONE-YEAR LIMITED WARRANTY The Seller warrants its products against defects in material or workmanship for a period of one (1) year from the date of manufacture. The liability of the Seller is limited, at its option, to repair, replace or issue a non-case credit for the purchase prices of the goods which are provided to be defective.
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