RHC 8000 EN April 2019 D301207 Issue C
Page 15
3.6.2 Air Supply
It is important to ensure that there is an
adequate fresh air supply at all times for
both combustion and heating requirements.
Modern constructions involve the greater
use of insulation, improved vapor barriers,
and weather proofing.
This practice means that buildings are
sealed much tighter than in the past.
The combustion air supply for a power
vented gas fired air heater (Type B
installation) can be affected by lack of air
supply. Natural infiltration may not be
adequate. Use of extract fans aggravates
this situation. It is important to ensure that
there is an adequate air supply at all times.
Reliance on doors and windows is not
allowed. Always ensure that an adequate
inlet for fresh air for combustion is provided
sized to suit the total installation of any
combustion apparatus.
Fix an access guard (IP 20) into the wall
for combustion air and take appropriate
action to ensure that it remains unblocked.
See national installation requirements for
aeration & ventilation of buildings.
This model air heater is installed
as a type B application and
is designed to take air for
combustion from the space in
which it is installed. Do not restrict
the combustion air intake.
3.7 Electrical Supply
Wiring external to the air heater must be
carried out in accordance with the rules
in force and by appropriately qualified
persons.
Check the electrical specification is in
accordance with the specification on the
appliance data plate. A unique appliance
wiring diagram is supplied as a separate
document attached to this one plus an
additional copy attached to the air heater.
A constant 230 volt 50 Hertz single phase
with neutral link fused electricity supply is
required. All heaters and controls must be
earthen. A lockable isolator with contact
separation of at least 3.0 mm on all
poles should be installed adjacent to the
appliance and within reach of any person
working on the heater.
When a number of heaters are to be
connected as part of a single installation
each heater must be provided with a
separate isolator.
Ensure that electrical supply cables do not
touch the very hot combustion collector
box. The final connection must be made
in the terminals provided in the control
compartment. Follow the wiring diagram
provided with the air heater and the air
handler.
Electrical supply cable conductor size should
be 1.5 mm. The length of conductors
between the cord grip and the terminals
must be such that in the event that the
cable becomes taut the line conductors do
so before the earth conductor.
3.8 Gas Supply
Attention : gas service connection Rc 3/4
for models RHC 8000 & Rc 11/4 for models
RHC 8000M
RHC 8000(M) air heaters are designed to
operate on either natural gas (G20/G25 /
G25.3). Refer to the specifications in section
2 of this document and to the data plate for
details of supply pressures.
The gas meter and gas service must be
checked by the supply undertaking to
ensure that they are adequate to deal with
the total load of all gas fired apparatus
installed.
Connection to a gas service may only
be carried out by appropriately qualified
persons. The gas installation must comply
with the rules in force using materials
appropriate for gas installations.
WARNING
Summary of Contents for Reznor RHC DJL 8000
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