3
2.0 General Overview
2.1 The product incorporates a Heat Exchanger that recovers the heat energy from the "extract air" that would
normally be lost with other ventilation systems. It does this using minimal power consumption as the product
uses EC low energy motors.
2.1.1 Depending on the way your ComfoAir 155 WMe unit has been installed, the specific operation may vary.
The unit has either two or three speeds available:
ZGS2 switch markings: Low (I) & High (II) operation
ZGS1 switch markings: Low (centre), AUX (I) & High (II) operation
ZGRC1 boost and system status controller markings:
Low (I) & High (II) operation
(See section 3.1.8 for system status details)
Note: Other manufacturers switches may show different markings, or your unit may be connected to
a Building Management System (BMS).
2.1.2 To maintain good indoor air quality within the dwelling it is important that the ventilation system remains in
operation at all times unless powered down periodically for maintenance/repair.
2.1.3
Warning: This appliance can be used by children aged from 8 years and above and persons
with reduced physical, sensory or mental capabilities or lack of experience and knowledge if
they have been given supervision or instruction concerning use of the appliance in a safe
way and understand the hazards involved. Children shall not play with the appliance.
Cleaning and user maintenance shall not be made by children without supervision.
2.1.4
Where an open-flued oil or gas-fuelled appliance is installed, precautions must be taken to
avoid a back-flow of gases into the room.
2.1.5
If the supply cord is damaged, it must be replaced by a special cord / assembly available
from the manufacturer or its service agent (model code CAWMCM5C). The replacement
must be carried out by a qualified Electrician in accordance with IEE or local regulations.
2.1.6
To disassemble the unit, disconnect from mains supply and use a screwdriver to segregate
the electronic components and motors from the plastic housing. Dispose items in
accordance with WEEE.
2.1.7
WEEE Statement
This product may not be treated as household waste. Instead it should be handed to an
appropriate collection point for the recycling of electrical and electronic equipment.
For more detailed information about the recycling of this product, please contact your
local council office or your household waste disposal service.
ZGS2
ZGS1
ZGRC1
2 - Speed
Operating on a continual basis
Low Speed
High Speed
Low Speed
AUX Speed
High Speed
Activating manually using either our ZGS1 or ZGS2 switch
Activating manually using either our ZGS1 / ZGS2 switch
Activating manually using either our ZGS1 / ZGS2 switch, via
'switch-live' or via our ZGRC1 boost and status controller
3 - Speed
