Reznor, RHC21 8000 Installation EN May 2021 D301319 Issue 0 Page No 19 of 52
Other gas fired plant using the same gas service
must also be taken into account.
A 90° action, positive stopped gas service tap
must be fitted adjacent to the appliance, fitted
in a manner to facilitate appliance burner
removal for service purposes, see figure 6.
Ensure that the gas service includes a filter and
has been tested and purged in accordance with
prescribed practice prior to commissioning and
taking the appliance into service.
As a rule, gas service pipes should not be routed
through air ducts. Should it be necessary to
do so then pipe work joints must not be made
within the air duct.
Figure 6 Gas connection detail
Rc 3/4 for models RHC21 8000
Rc 11/4 for models RHC21M8000
4.11 Electrical supply
The electrical installation may only
be carried out by an appropriately
qualified person in accordance with
the current Rules and Regulations
in force.
This appliance must be earthed.
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.
A constant 230 volt 50 Hertz single phase with
neutral link fused electricity supply is required.
All heaters and controls must be earthed.
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.
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.
Check that the air heater is well earthed and
that an earth leakage test is carried out.
An external green indicator light is fitted on the
heater section to signify when the burner is ON.
An external burner reset switch with red
indicator light is fitted on the unit. To add a
remote reset button, make connections to the
terminals in the heater as indicated on the
wiring diagram.
