Introduction - Vent-Axia HR400 Installation And Servicing Instructions

HR400
HR320
VCON77
4
1.1
1. The HR320 and HR400 are a
range of whole house ventilation units
(Figs. 1 & 2).
The ventilation unit works in conjunction with a
duct system enabling air to be transferred
throughout the house.
The whole house system works by replacing
the warm stale moist air from the house, with
fresh air from outside. The fresh air passes
through a highly efficient heat exchanger and is
Fig. 1
prewarmed by the heat which is recovered from
the extracted air. The heat exchanger recovers
up to 70% heat from the outgoing stale air.
1.2
1. The unit is designed to switch between trickle
and boost settings to give optimum
performance. This can be achieved manually
through a switch or pull cord, or automatically
using a remote humidity sensor.
Trickle is continuous low speed at which the air
in the property is changed approximately once
every two hours.
Boost increases the ventilation rate throughout
the property for manual control. Under
Fig. 2
automatic control the unit changes to boost on
increase in relative humidity above a set point.
It reverts to trickle when the relative humidity
drops below the set point.
NOTE: The system is audible when
operating at boost speed.
2. Speed control of the unit is via a separate
transformer (VCON77) which is capable of
giving a range of six speeds (Fig. 3). Any two
speeds can be selected on installation to give
trickle and boost settings most appropriate to
the system.
With the units operating on boost setting the
electrical power consumption is;
NOTE: Refer to the VCON77 instructions for
Fig. 3
information on installation and speed
selection.

1.0 Introduction

Description
Operation
HR320 - 200W
HR400 - 305W