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"WHHR MAXI & MAXI PLUS" - WHOLE HOUSE HEAT RECOVERY UNIT
INSTALLATION AND OPERATING & MAINTENANCE INSTRUCTIONS
Safety Notice
It is important to read this Instruction Manual carefully before installing or using the product. Following
these instructions will ensure that your ventilation system is installed, commissioned and used properly and
continues to operate effectively. Vectaire will not be held responsible and will not accept liability for any dam-
age caused to persons or property through failure to follow the guidance provided in this manual. It should
always be available with the product for easy reference.
WHHR - Maxi:
6"/150mm spigot, for dwellings up to 250m
2
, max capacity 177 litre/sec
Maxi Plus:
6"/150mm spigot, for dwellings up to 400m
2
, max capacity 238 litre/sec
General Information
The Vectaire WHHR Maxi/Maxi Plus heat recovery systems provide
whole house mechanical ventilation to living areas, bedrooms, kitchen
and bathrooms. They extract stale, contaminated air from kitchens, util-
ity rooms and bathrooms, and use the heat recovered from this air to
warm fresh, incoming air to create a flow of fresh, filtered air throughout
the dwelling. The extract and intake air streams are separated to avoid
contamination.
The system will operate continuously to create a stable, comfortable,
healthy environment avoiding the use of excessive energy and saving
heat already generated.
The heat recovery unit must be installed vertically, and will generally be
sited in a cupboard. It will be connected by hidden ductwork to vents
sited in the ceilings of the rooms which are to be ventilated. Each unit
is commissioned individually so that the amount of air moved is tailored
to suit the performance required. There will be a facility to boost the
extraction rate when desired (e.g when cooking or bathing, or when pollutant levels rise). This may be done auto-
matically or manually.
The system is designed to run continuously and should NOT be switched off except for maintenance or filter
replacement. It is important to follow the advice in this user manual and correctly install and maintain the
system to ensure a healthy and comfortable indoor environment.
Features
• SAP PCDB Listed
whole house heat recovery units giving continuous ventilation in the kitchen and up to seven
additional wet rooms (using rigid ducting)
•
low noise levels
•
variable choice low (trickle) speed and boost options for optimum setting at installation
•
boost speed triggered by a switched live connection from:
- a light switch (if more than one light switch is used,
each one must be a double pole switch)
- DRH240 (dynamic remote humidistat)
- PIRFF (passive infra red)
- THM (thermostat)
- a remote switch/pull cord
or via LCD control panel
• Can be mounted with left or right hand drainage and ducting
• Economical EC motor with electronic control plus:
Standard control features
:
>
variable adjustment
- trickle and boost speeds set at installation for both motors independently
> boost setting
- with integral overrun timer adjustable up to 20 minutes
> optional delay-on-timer -
boost speed does not operate if switched off within 2 minutes
> integral frost-stat -
proportionately reduces intake motor speed as temperature falls
> purge boost
- for rapid air change
> BMS connections
- for remote motor shut off
•
Installation MUST be carried out by suitably qualified personnel and MUST be in accordance with current IEE
regulations
Incoming
fresh air
Warmed fresh air
Cooled
outgoing
stale air
Outgoing stale air
