40MBAB: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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Table 15 — Dip Switch Definitions
*NOTE: When DIP SWITCH SW1 is set to default, the system
automatically detects the wiring method according to the
three control scenarios. In the event of an unexpected
failure, DIP SWITCH SW1 can be set according to Table 15.
Dial Code Control Scenario Function ON OFF
SW1-1*
OFF is for 1
and ON is for 2
Control Function 24 V Communication
[Default] Auto Detect or RS485 S1-S2
Communication
SW1-2 1,2 Anti-cold blow protection option NO [Default] YES
SW1-3 1,2
Single cooling / heating and cooling
options
Cooling [Default] Cooling & Heating
SW1-4*
OFF is for 2
and ON is for 1
Control Function Scenario 1 [Default] Auto Detect or Scenario 2
SW2-1 2
Compressor Running Compensation
(Demand working with heat pump+
Electric heat)
Compressor slower speed [Default] Faster Compressor
SW2-1 1
Temperature differential to activate first
stage auxiliary heat (the GAP of T1
and Ts) Wire controller demand with
heat pump + Electric heat working
together
2F [Default] 4F
SW2-2 1 Electric heat on delay YES [Default] NO
SW2-3 1
Electric auxiliary heating delay to start
time
30 minutes [Default] 15 minutes
SW2-4 1
Compressor/Auxiliary heat outdoor
ambient lockout
The compressor will not operate if the
outdoor temperature is lower than the
temperature represented by S3
[Default] The heater will not operate if the
outdoor temperature is greater than the
temperature represented by S3
Rotary
Switch S3
1
Set outdoor temperature Limitation (for
auxiliary heating or compressor)
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
SW3-1 2
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
30 minutes [Default] 90 minutes
SW3-2 2
Cooling and heating Y/Y2 compressor
speed adjustment.
Compressor slower speed [Default] Faster Compressor
SW3-3 2
Compressor Running (demand
working with heat pump+ Electric heat)
Compressor slower speed [Default] Faster Compressor
SW3-3 1
Temperature differential to activate
second stage auxiliary heating (the
GAP of T1 and Ts) Wire controller
demand with heat pump+ Electric heat
working together
4F [Default] 6F
SW3-4 2
Fan speed of the COOLING mode
when 24V thermostat is applied for.
Turbo Off
SW4 1,2 Electric heat nominal CFM adjustment
Available settings are 000/001/010/
011. Each digit corresponds an
individual switch position. For
example [SW4-1 OFF, SW4-2 ON,
SW4 -3 OFF] = 010. See table 11 for
the corresponding CFM adjustment
S4-1 2 Default ON
[Default] For single stage
supplemental heat, W1 and W2 are
connected
For dual stage supplemental heat, W1 and
W2 are controlled independently.
S4-2 2 DH function selection
[Default] Dehumidification
control not available
Dehumidification feature is enabled
through thermostat
Control Scenario
Wired Controller S1+S2 (1 + 2 + 3) 1
24V Tstat, S1+S2 (1 + 2 + 3) 2
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