GE 3900, 2900 Load Shedding Central Desk Control, Freeze Sentinel, Constant on Fan

Safety Instructions

Operating Instructions

Care and Cleaning

Troubleshooting Tips

Auxiliary controls on your Zoneline.

Load Shedding (Central Desk Control)
This feature is active only if the unit is in
CDC mode. When this switch is enabled (UP),
the indoor fan can be turned ON or OFF with
the unit controls.	LOAD SHEDDING (CDC)
Freeze Sentinel
When this switch is enabled (UP), it turns OFF
the freeze sentinel protection feature. With the
switch disabled (DOWN), the freeze sentinel is
activated, which automatically provides heat		FREEZE Sen (Freeze Sentinel)
without user interface. This helps to prevent
plumbing damage by turning the heater and
indoor fan ON at 41°F and OFF at 46°F.

Constant ON Fan

When this switch is enabled (UP), it allows the indoor fan to run continuously, at high speed, even if the unit is in the STOP position.

	CONST FAN (Constant
	ON Fan)
Temperature Limiting
Temperature limiting can reduce energy costs	The first three switches are used to select the
by limiting the lowest temperature that can be	cooling limits, and the remaining three switches
set for cooling and the highest temperature that	are used to control the heating limits. This
can be set for heating. Temperature limiting is	feature is not available with the Remote
controlled by the second six auxiliary switches.	Thermostat—Class 2.

DOWN											HIGH				DOWN	DOWN												HIGH				DOWN
UP											COOL				UP	UP												COOL				UP
1	2	3	4	5	6	7	8	1	2	3			6	7	8		1	2	3	4	5	6	7	8	1	2	3			6	7	8
											4	5																4	5

	TL1 (H) (Temp. Limit 1–Heat)
TL1 (C) (Temp. Limit 1–Cool)
TL2 (C) (Temp. Limit 2–Cool)	TL2 (H) (Temp. Limit 2–Heat)
TL3 (C) (Temp. Limit 3–Cool)	TL3 (H) (Temp. Limit 3–Heat)

Consumer Support

6

Temperature limiting during COOL mode

(all temperatures shown in °F)

UP	DOWN	Minimum	Maximum
NONE	1, 2, 3	60°	85°
1	2, 3	64°	85°
1, 2	3	66°	85°
2	1, 3	68°	85°
2, 3	1	70°	85°
1, 2, 3	NONE	72°	85°
1, 3	2	74°	85°
3	1, 2	76°	85°

Temperature limiting during HEAT mode

(all temperatures shown in °F)

UP	DOWN	Minimum	Maximum
NONE	4, 5, 6	60°	85°
4	5, 6	60°	80°
4, 5	6	60°	78°
5	4, 6	60°	76°
5, 6	4	60°	74°
4, 5, 6	NONE	60°	72°
4, 6	5	60°	70°
6	4, 5	60°	65°