WHHRM300DC & WHHR400DC 5
Design
Chapter 3
3.1 Exploded view appliance
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3.2 Component functions
1
Interior temperature sensor
Measures the temperature of the air from the dwelling.
2
Heat exchanger
Ensures heat transfer between input and output air
3
Filters
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4
Atmospheric temperature sensor
Measures outside air temperature.
5
Communication port
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6
Cable grommet
Grommet for feeding through power cable 230 Volt
7
OpenTherm connection
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8
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Contains various additional control inputs and outputs for provisions such as a pre
heater, a postheater, two control valves, CO
2
sensor, H
2
O sensor and emergency
setting.
9
Input fan
Feeds fresh air into the dwelling.
10
Basic pcb
Contains the control electronics for the basic functions.
11
Computer port
Computer connection for service purposes.
12
Control panel
Interface between user and control electronics.
13
Output fan
Discharges fouled air from the dwelling to the atmosphere.
14
Duct spigots
Connections for the input and output ducts.
15
Connection condensate discharge
Connection condensate discharge.
