35
Table 7. Smart hub Parameters - Heat Cool Stages Locked In
H/C
Stages
Locked =
Disabled
H/C
Stages
Locked =
Enabled
POINTS:
3rd stage
ON
1st stage
ON
2nd stage
ON
3rd stage
ON
1st stage
ON
2nd stage
ON
2nd
stage
OFF
SP -1.5
SP -1.0
SP -0.5
SP
SP
SP -2.0
Stg1 Differential
Stg3 Differential
Stg2 Differential
SP -2.5
SP -3.0
SP -3.5
Stg1 Differential
Stg3 Differential
Stg2 Differential
Heating - Dual Fuel - 3 Stages (2 compressor / 1 backup)
Stg4 Diff.
H/C
Stages
Locked =
Enabled
H/C
Stages
Locked =
Disabled
3rd stage
ON
1st stage
ON
2nd stage
ON
4th stage
ON
3rd stage
ON
1st stage
ON
2nd stage
ON
4th stage
ON
Stg4 Differential
2nd
stage
OFF
4th
stage
OFF
5
.
0
-
P
S
0
.
1
-
P
S
5
.
1
-
P
S
:
S
T
N
I
O
P
SP
SP
SP -2.0
Stg1 Differential
Stg3 Differential
Stg2 Differential
SP -2.5
SP -3.0
SP -3.5
Stg1 Differential
Stg3 Differential
Stg2 Differential
Heating - Dual Fuel - 4 Stage (2 compressor / 2 backup)
Table 8. Heat Pump Parameters
Parameter
Description
About
This screen provides information concerning language supported, equipment type name, unit model number, unit serial number, unit nominal capacity, number
of heating states, number of cooling stages, heating capacity by stage, cooling capacity by stage, control software revision, control model number, control serial
number, control hardware revision, outdoor air temp sensor, protocol revision number, device product level, 24VAC average power consumption, 24VAC peak power
consumption, line voltage average power consumption, line voltage peak power consumption, outdoor inverter model number, outdoor inverter firmware version,
outdoor fan RPM profile, unit code, compatible devices list, application code memory size and micro-controller part number.
Automatic Max
Defrost
(Single and Two-Stage
Lennox Communicating
Heat Pump Units)
When set to
ON
, the system will always run at MAX DEFROST when accumulated compressor off time is longer than 30 minutes and ambient temperature is less than
35°F (1.6°C).
When ambient sensor temperature is higher than 40°F (4.5°C) then defrost termination will be 90°F (32°C).
This option has two settings, either
ON
or
OFF
. Default is
OFF
.
Compressor Shift
Delay ON / OFF
Single and Two-Stage Heat Pumps:
This feature reduces sounds that occur while the unit is cycling in and out of the defrost mode.
• When enabled, there is a 30-second compressor shift delay which de-energizes the contactor and ECM fan outputs. After the delay expires, the contactor and ECM
fan outputs are energized.
•
When disabled, the reversing valve is shifted by de-energizing the outputs.
Variable Capacity Heat Pumps:
•
The “Shift delay” is not a technician settable parameter on variable capacity heat pumps.
•
“Shift Delay” is always enabled going into and out of a defrost. the inverter was updated with “slope logic” and shift delay is always enabled. The shift delay is:
Compressor shut off > 4s delay > reversing valve shifts > 26s delay > compressor restarts. I have attached a screen print from a current XP25-036 from remote in
that lists the technician settable parameters.
Compressor Short
Cycle Delay’
(Single and Two-Stage
Lennox Communicating
Outdoor Units)
This feature prevents the compressor from being short cycled any time the compressor is turned “OFF”. The range is 60 - 300 seconds. Default is 300 seconds and with
an incremental adjustment of 60 seconds. When the system initiates a compressor short cycle delay, the outdoor unit control’s seven segment display will count down
the delay in minutes 1 to 5 minutes. The sequence is time remaining and a dash, and will repeat that cycle (5, 4, 3, 2 and 1) until the count down is complete. If the
delay timer is change to let’s say 180 seconds, then the countdown will start at 3.
