Carrier ZONECC3Z Limit Temperature Levels and Actions, Dipswitch Settings, System Setup

Table 2—Limit Temperature Levels and Actions

LIMIT LEVEL	0	1	2	3	4	5	6	7
Cooling Limit (40 deg) above	47	46	45	44	43	42	41	40
HP limit (115 deg) below	107	108	109	110	111	112	113	115
Heat Limit (130 deg) below	119	121	122	124	125	127	128	130
Heat Limit (145 deg) below	131	133	135	137	139	141	143	145
Heat Limit (160 deg) below	143	145	148	150	153	155	158	160
Heat Limit (175 deg) below	155	158	161	164	166	169	172	175
LIMIT ACTIONS
″Closed″ Damper Positions	0	2	4	6	8	10	12	14
Allowed stages (1 stg)	1	1	1	1	1	1	1	0
Allowed Stages (2 stg)	2	2	2	1	1	1	1	0
Allowed stages (3 stg)	3	3	3	2	2	1	1	0

Using Limit Level Indicator

The final setting of the bypass for best performance has always been something of a black art. The 3-Zone System has a new feature to simplify this adjustment. While the system is operating, these limit level numbers, if greater than zero, are flashed on the status LED.

Once the proper LAT limit choice is made based on equipment maximum rise, the limit level indicator assists in setting the bypass pressure adjustment. See System Setup for details.

Installer Test Mode

Dipswitch 4 selects a special Installer Test Mode, designed to assist the installer (or service person) to commission the system. It verifies damper movement in proper zone and that the heating and cooling equipment operates properly at each stage. When this mode is selected, by moving dipswitch 4 to ON, the following sequence will be executed once:

Step 1 — Two minutes, one flash of status LED. The blower is energized with G, damper 1 opens, and other dampers are closed.

Step 2 — Two minutes, two flashes of LED: With the blower on, damper 1 closes and damper 2 opens.

Step 3 — Two minutes, three flashes of LED: With the blower ON, damper 3 opens and damper 2 closes.

Step 4 — Two minutes, four flashes of LED: All dampers open, first stage of heat turns on. For HP control only, this is followed by the second stage of heat (HP plus aux heat, hi HP, or hi furnace) for two more minutes. For HP control with two stage compressor, the third stage of heat (hi HP plus aux heat) comes on for a third 2 minute period.

Step 5 — Two minutes, five flashes of LED: All dampers are open and first stage of cooling turns on for 2 minutes. For HP board only, second stage of cooling comes on for an additional 2 minutes.

At the end of Step 5, the control returns to normal operation. To restart the test sequence, the switch must be moved to OFF and then back to ON.

If zoning is disabled (Switch 5 = ON), the procedure above will be followed, except all the dampers will remain open throughout the sequence.

SYSTEM SETUP

Thermostats

Read the thermostat Installation Instructions and be sure to complete the required setup of these devices before using them to bring on the equipment. If the thermostats have a ″zoning″ selection, be sure to turn it on. This will eliminate the timers within the thermostat and allow the 3-Zone control’s timers to do their job.

There are 8 dipswitch settings on the AC zone control and an additional 4 on the HP board. Below is a table summarizing their function. Below the table is a more detailed description of what each does and how to set it properly for your application.

Table 3—Dipswitch Settings

DIPSWITCH 1 POSITION	ACTION	ACTION
	(OFF)	(ON)
1	Auto changeover Timer	Defeat
		Auto Changeover
	Active
		Timer
2	Auto Changeover 20 Min-	Auto Changeover
	utes	30 Minutes
3	Auto Changeover Timer X	Auto Changeover
	1	Timer X .5
4	Normal Operation	Installer Test
5	Zoning Enabled	Zoning Disabled
6	Fan With W Disabled	Fan With W Enabled
7	LAT Setting	LAT Setting
8	LAT Setting	LAT Setting

Table 4—Dipswitch Settings

for HP Control Only

DIPSWITCH 2 POSITION	ACTION	ACTION
	(OFF)	(ON)
9	HP Operation	AC Operation
10	HP Thermostat	AC Thermostat
11	LAT and HPT	LAT and HPT
	Safeties Enabled	Safeties Disabled
12	Reversing Valve Ener-	Reversing Valve
	gized in Cooling (O)	Energized in Heating (B)

Dipswitches

Dipswitch 1- This determines whether or not a minimum time must pass before the control is allowed to transition between heating and cooling or vice versa. If it is set to ON, there is no time requirement. Default is OFF.

Dipswitch 2 - This switch, together with dipswitch 3, determines the changeover time, effective if switch 1 is OFF. ON sets 30 minutes. OFF sets 20 minutes. Default is OFF.

Dipswitch 3 - This is a multiplier, modifying the time set on switch

2.ON multiplies the set time by 0.5. OFF multiplies the set time by 1.0. Default is OFF.

Dipswitch 4 - This selects the Installer Test Mode, used to check system operation. Details are provided in section Installer Test. ON selects Installer Test. OFF selects normal operation. Default is OFF.

Dipswitch 5 - Enables and disables zoning. ON disables zoning, with all dampers open and zone 1 thermostat controlling. OFF selects normal zoning operation. Default is OFF.

Dipswitch 6 - Selects G ON or OFF with W. Selecting ON causes G to be energized whenever W is energized. Selecting OFF does

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