Mars Comfort-Aire Century VCD24 SA Series Installation Manual page 39

Installation and Operation Manual - VCDxxSA
Function DIP switch settings:
The 24V thermostat mode needs to refer
to the following settings:
000 is the default 000/001/010/
011/100/101/110/111,internal
machines with different abilities,
electric heating and PSC
classification for use.
Indoor unit dial code
Dial Control
No.
Code Scenario
1 SW1-2 1,2
2 SW1-3 1,2,3
3 SW2-1 1
4 SW2-1 2
5 SW2-2 2
6 SW2-3 2
7 SW2-4 2
Rotary
8 2
Switch S3
9 SW3-1 1
10 SW3-2 1
11 SW3-3 1
12 SW3-3 2
13 SW3-4 1,3
14 SW4 1,2,3
15 S4-1 1,3
16 S4-2 1,3
NOTICE:
The SW4 DIP switch is only for Certified service technicians to debug and use, please do not touch it.
Function
Anti-cold blow protection option
Single cooling / heating and and cooling options
Compressor Running (demand working with heat
pump+ Electric heat)
Temperature di erential to activate first stage
auxiliary heat(the GAP of T1 and Ts),Wire
controller demand with heat pump+Electric heat
working together
Electric heat on delay
Electric auxiliary heating delay to start time
Compressor/Auxiliary heat outdoor ambient lockout
Set outdoor temperature Limitation
(for auxiliary heating or compressor)
Maximum continuous runtime allowed before
system automatically stages up capacity to satisfy
set point. This adds 1 to 5°F to the user set point
in the calculated control point to increase capacity
and satisfy user set point
Cooling and heating Y/Y2 temperature
di erential adjustment.
Compressor Running (demand working with heat
pump+ Electric heat)
Temperature di erential to activate
second stage auxiliary heating(the GAP of T1 and
Ts)Wire controller demand with heat pump+Electric
heat working together
Fan speed of cooling mode when
24V Thermostat is applied for.
Electric heat nominal CFM adjustment
Default ON
DH function selection
Function combination table of SW1-1 and SW1-4:
SW1 Control type
Free match
Wired
controller
24V
Thermostat
24V
Thermostat
ON
NO
Cooling
Compressor slower speed
2 （1 ）
YES
30 minutes
The compressor will
not operate if the
outdoor temperature
is lower than the
temperature
represented by S3
0 means that the temperature protection is not
turned on, the dial range is 1 through F, 1 equals -4°F
and it increased up to 46°F based on table "A"
30 minutes
Compressor slower speed
Compressor slower speed
（2 ）
4
Turbo
Available settings are 000/001/010/011. Each digit corresponds an indiviual swith
position.
For example [SW4-1 OFF, SW4-2 ON, SW4 -3 OFF] = 010
See table 11 for the corresponding CFM adjustment
[Default] For single stage supplemental heat,
W1 and W2 are connected
[Default] Dehumidi fication
control not available
38
38
Stand alone or full system
Free match
Full system
Full system
Stand alone
OFF
[Default] YES
[Default] Cooling & Heating
[Default] Faster Compressor
Only a ects compressor
[Default] 4 （2 ）
[Default]NO
[Default] 15 minutes Based on SW2-2 is ON
[Default] The heater will not
operate if the outdoor
temperature is greater
than the temperature
SW2-4 and S3 need to
represented by S3
working together
[Default] 90 minutes
[Default] Faster Compressor Only a ects compressor
Only a ects compressor
[Default] Faster Compressor
and W2
（3 ）
[Default] 6
High
For dual stage supplemental heat,
W1 and W2 are
controlled independently.
Dehumidification feature is enabled
through
thermostat
Note
and W1