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Auxiliary Control Switches
These switches are located behind the room cabinet under the control panel.
2900 and 3900 Series
Switches
Description
Left Switches
(1)
ALL I2R
(2)
C: FAN
()
H: FAN
(4)
CLASS 2
(5)
LOAD SHED
(6)
FREEZ S
(7)
CONST FAN
Right Switches
TL1 – TL
TL4 – TL6
(7)
(8)
900 Series shown
DOWN
ALLI
R (All Electric Heat)
2
(3900 Series models only)
C: FAN CN (Cooling–Smart Fan)
H: FAN CY (Heating–Smart Fan)
CLASS 2 (Remote Thermostat)
LOAD SHEDDING (CDC)
FREEZ Sen (Freeze Sentinel)
CONST FAN (Constant ON Fan)
NO FUNCTION (Reserved for future use)
Cooling and Heating temperature limits are set independently, temperature limiting
switches are in factory-set down position, except as noted.
Cooling Temperature Limits
Switches Up
NONE
60
64
Heating Temperature Limits
Switches Up
6
4, 6
65
70
12
Heat pump override —
Down — Normal heat pump operation
Up — resistance heat only (900 Series only)
Fan control for cooling operation —
Down — Fan Continuous
Up — Fan Cycle
Fan control for heating operation —
Down — Fan Cycle
Up — Fan Continuous
Remote Thermostat Mode —
Down — Unit Control
Up — Remote Thermostat
Load Shedding when connected to Central Desk Control System —
Down — Fan shuts off with unit
Up — Fan under "Smart Fan" settings
Freeze Sentinel
Override —
™
Down — Freeze Sentinel ON
Up — Freeze Sentinel OFF
Constant Fan —
Down — Fan runs normally
Up — Fan runs when unit is in STOP position
Cooling temperature limiting (See table at bottom of page)
Heating temperature limiting (See table at bottom of page)
Heat Sentinel switch —
Down — Heat Sentinel OFF
Up — Heat Sentinel ON
Heat Boost (900 series only) —
Down — Heat Boost OFF
Up — Heat Boost ON
Auxiliary (2900 and 900 series)
UP
1
2
3
4
5
6
7
8
1
1
1, 2
2
66
68
4, 5, 6
5, 6
72
74
HIGH
UP
DOWN
COOL
2
3
4
5
6
7
8
HEAT BOOST
(3900 Series models only)
Heat Sentinel
TL1 (H) (Temp. Limit 1–Heat)
TL2 (H) (Temp. Limit 2–Heat)
TL3 (H) (Temp. Limit 3–Heat)
TL1 (C) (Temp. Limit 1–Cool)
TL2 (C) (Temp. Limit 2–Cool)
TL3 (C) (Temp. Limit 3–Cool)
2,
1, 2,
1,
70
72
74
5
4, 5
4
76
78
80
76
NONE
85
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