McQuay MHC Standard Range - Page 25

IM 985-1 / Page 25 of 36
Up button
Down button
Right (fan) button
Left (system) button
RC/RH Jumper
Field programming pins
Conguration switch
Reset switch
Specifications–668811201
Electrical rating: • 24 VAC (18-30 VAC)
• 1 amp maximum per terminal
• 3 amp maximum total load
Temperature control range:
45°F to 90°F (7°C to
32°C) Accuracy: ± 1°F (± 0.5°C)
System congurations:
1-stage heat, 1-stage cool, heat
pump
Timing: Anti-short
Cycle: 4 minutes
Backlight Operation
Terminations:
S1, S2, Y, W/O/B, G2, G1, RC, RH, C
For detailed installation, operation and application refer
to Operation & Application Guide LIAF014
Figure 18. Thermostat Parts Diagram - Part No. 668811201
Non-Programmable Electronic Thermostat
(P/N 668811201)
1 Heat/1 Cool, Auto Changeover, Fan Speed Control,
Hardwired
• Congurable
• Single-Stage Heat/Cool Systems
• Single-Stage Heat Pump Systems
• Fan Speed Control
• Large Display With Backlight
• Selectable Fahrenheit or Celsius
• SimpleSet™ Field Programming
• Status Indicator Light
• Relay Outputs (minimum voltage drop in thermostat)
• Remote Sensor Compatible
• Ideally Suited for:
– Residential (New Construction/Replacement)
– Light Commercial
Specifications–668810301
Electrical rating: • 24 VAC (18-30 VAC)
• 1 amp maximum per terminal
• 3 amp maximum total load
Temperature control range:
45°F to 90°F (7°C to
32°C) Accuracy: ± 1°F (± 0.5°C)
System congurations:
1-stage heat, 1-stage cool, heat
pump
Timing: Anti-short
Cycle: 4 minutes
Backlight Operation
Terminations:
S1, S2, Y, W/O/B, G2, G1, RC, RH, C
For detailed installation, operation and application refer
to Operation & Application Guide LIA303
Figure 17. Thermostat Parts Diagram - Part No. 668811301
Reset switch
Up button
Down button
Right (fan) button
Left (system) button
RC/RH Jumper
Field programming pins
Conguration switch
Fan switch
Reset switch