Table of Contents
Advertisement
LIMIT LEVEL
Cooling Limit (40 deg) above
HP limit (115 deg) below
Heat Limit (130 deg) below
Heat Limit (145 deg) below
Heat Limit (160 deg) below
Heat Limit (175 deg) below
LIMIT ACTIONS
"Closed" Damper Positions
Allowed stages (1 stg)
Allowed Stages (2 stg)
Allowed stages (3 stg)
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.
Table 2—Limit Temperature Levels and Actions
0
1
2
47
46
45
107
108
109
119
121
122
131
133
135
143
145
148
155
158
161
0
2
4
1
1
1
2
2
2
3
3
3
3
4
44
43
110
111
124
125
137
139
150
153
164
166
6
8
1
1
1
1
2
2
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
1
Auto Changeover 20 Min-
2
Auto Changeover Timer X
3
4
5
6
7
8
Table 4—Dipswitch Settings
for HP Control Only
DIPSWITCH 2 POSITION
9
10
11
Reversing Valve Ener-
12
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
7
5
6
42
41
112
113
127
128
141
143
155
158
169
172
10
12
1
1
1
1
1
1
ACTION
ACTION
(OFF)
(ON)
Defeat
Auto changeover Timer
Auto Changeover
Active
Timer
Auto Changeover
utes
30 Minutes
Auto Changeover
1
Timer X .5
Normal Operation
Installer Test
Zoning Enabled
Zoning Disabled
Fan With W Disabled
Fan With W Enabled
LAT Setting
LAT Setting
LAT Setting
LAT Setting
ACTION
ACTION
(OFF)
(ON)
HP Operation
AC Operation
HP Thermostat
AC Thermostat
LAT and HPT
LAT and HPT
Safeties Enabled
Safeties Disabled
Reversing Valve
gized in Cooling (O)
Energized in Heating (B)
7
40
115
130
145
160
175
14
0
0
0
Hide quick links:
Advertisement
Table of Contents
