H2Air+
+
159
Wiring Connection Table
Terminal Wiring Connection
AHU W1 Connect to AHU W1
AHU W2 Connect to AHU W2
AHU R Connect to AHU R
Flow switch Flow switch input terminal
T/S W1 Connect to thermostat W1
T/S W2 Connect to thermostat W2
T/S R Connect to thermostat R
Outdoor Sensor Outdoor sensor input
Dip Switch Function Table
SW (DIP 1–4) ON OFF Default
DIP 1
Outdoor reset
not in use
Outdoor reset
in use
OFF
DIP 2
Simultaneous
DHW and
heating*
DHW priority OFF
DIP 3
2-stage
thermostat using
1-stage
thermostat using
OFF
DIP 4 Reserved OFF
* Depending on the DHW flow rate (demand), simultaneous DHW and
heating may not be available. When the DHW demand is high, DHW
supply takes priority and the heating may be temporarily turned off until
the DHW demand decreases, even when this function is activated.
10.2 Installing the Device
This section provides information required to install the H2Air+
+
add-on controller in an NPE-180A/240A water heater.
WARNING
Ensure that you have turned off the power to the water heater
before installing the device.
10.1.2 Specifications
Refer to the following table for product specifications.
Items Specifications
Model name KDO-A100
Device type
Add-on controller for Navien NPE-180A/240A
water heaters
Installation
type
Snap-on (onto the NPE-180A/240A water heater
PCB tray)
Connections
Main connector socket to water heater
Main control connector (13-pin cable)
Thermostat input terminals
Contacts for one thermostat (1 or 2-stage)
Outdoor sensor connection terminal
Contacts for one outdoor sensor
Output terminal to the air handler unit
Contacts for one AHU (1 or 2-stage)
10.1.3 CSA P.9 –11 Rating
Combo System
CSHE WHPF
Recovery
Efficiency
TPF
Heat
Generator
Fan Coil
NPE-180A MMVE0S4NAAA 94 (%) 0.96 97 (%) 0.94
NPE-240A MMVE0M4NAAA 95 (%) 0.95 96 (%) 0.95
10.1.4 Device Layout
Refer to the following diagram for the product layout.
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