Johnson Controls ZY Series User Manual

Two Stage Cooling Configuration
• When Y1 is energized, CN-FAN, FAN1, and C1
or C2 will energize and the indoor fan VFD will
run at 67% speed. C1 or C2 activation depends
on initial start counts, and do not persist
through power cycles. When Y2 is energized,
FAN2 will energize and the indoor fan VFD will
run at 100% speed.
1. The FAN output for indoor fan operation
energizes with any cooling output after the
Indoor Fan Cool On Delay expires.
2. When the thermostat cooling inputs are
lost and the minimum runtime expires, the
compressor outputs stage off (Default 3
minutes).
3. A 30 second interstage delay occurs when
multiple stages are requested.A Y2 input
without a Y1 input energizes a C1 first and
then C2 30 seconds later.
Note: A Y2 input without a Y1 input
energizes a C1 first and then C2 30
seconds later.
Gas Heat Unit Configuration
• When W1 is energized FAN1, FAN2, and H1
outputs will energize, and the indoor fan VFD
will run at 100%. When W2 is energized, H2
output will energize.
Note: A 30 second fan on delay will start once
the Gas Valve input (MV) is energized. If MV
input is energized without a call for heat (W1/
W2), Fan will enable.
Electric Heat Unit Configuration
• When W1 is energized FAN1, FAN2, and H1
outputs will energize, and the indoor fan VFD
will run at 100%. When W2 is energized, H2
output will energize.
Table 57: Supply Fan Speed
Control Type Fan Output
Single Stage Cool (Y1)
7.3-7.4VDC (67%),
10VDC (100%)
1
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Two Stage Cool (Y1,Y2)
7.3-7.4VDC (67%),
10 VDC (100%)
Single Stage Heat (W1) 10VDC (100%)
Two Stage Heat (W1,W2) 10VDC (100%)
Fan only 6 VDC (50%)
1 10VDC signal is provided with FAN2 output only when Y2 is
energized
VFD Operation
• The VFD output is a 2-10VDC signal with a
minimum off time between fan cycles of 10
seconds, and a minimum on time for fan
cycles of 30 seconds.
Supply Fan Only Operation
• The Fan is controlled by the G Thermostat
input, and has lowest priority for sequences
within the ETC board. When the G input is
energized with a call for fan on the ETC, 24VAC
will be applied to FAN1 output, and 6VDC will
be applied to VFD output to produce 50% fan
speed.
Table 58: Fault Codes
SR. No. Condition Red LED Green LED
1 Power failure Off Off
2 Control Failure ON Off
3 Blackout condition 7 pulses Off
4 Brownout condition 6 pulses Off
5 Limit switch fault 8 pulses Off
6 Dual HPS faults 3 pulses 3 pulses
7 HPS1 fault Off 3 pulses
8 HPS2 fault 3 pulses Off
9 Dual LPS faults 4 pulses 4 pulses
10 LPS1 fault Off 4 pulses
11 LPS2 fault 4 pulses Off
12 Dual FS fault 5 pulses 5 pulses
13 FS1 fault Off 5 pulses
14 FS2 fault 5 pulses Off
15 GV false proof 9 pulses Off
16 GV lost proof 10 pulses Off
17
2nd stage in
ASCD (heat/cool)
Rapid flash On
18
2nd stage on
(heat/cool)
On On
19
1st stage in
ASCD (heat/cool)
Off Rapid flash
20
1st stage On
(heat/cool)
Off On
INSTALLATION MANUAL ZY SERIES 3-10ton 60 Hertz R-410A102
Johnson Controls Ducted Systems

Johnson Controls ZY Series Specifications

General

Brand	Johnson Controls
Model	ZY Series
Category	Air Conditioner
Language	English