1712VRA
‐
4EGBEN,
pag..
15/25
Removal & replacement of parts
VRA-4E air heaters must only be fitted with
authorized replacement parts. These heaters
must use certificated spare parts to comply with
legislation.
Remember! After any service work has been
carried out, the air heater must be
fully commissioned.
See section 6 of this document
8.1 Main burner removal
Instructions for burner removal (see figure 8):
1. Turn OFF the gas supply to the air heater.
2. Switch OFF the electricity supply to the air
heater.
3. Open the access door.
4. Disconnect the union in the gas supply outside of
the appliance.
5. Remove gas supply pipe from multi-functional
gas control valve.
6. At the burner rack assembly, remove the nuts
that secure the burner manifold to the burner
rack. Lift the burner rack/manifold assembly
upward and pull the assembly out of the air
heater.
Instructions for re-assembly:
1. Reverse the procedure for removal making sure
that all parts are installed correctly. Check that
all components are secure.
2
When lighting, always follow the lighting
instructions on the air heater.
8.2 Burner injectors
1.
Carry out steps 1 to 6 of section 8.1.
2.
Unscrew the main burner injectors.
3.
Re-fit new injectors.
4. Re-assemble in reverse order
Figure 8
Figure 9 View of the Control Compartment
8
1)
Burner
7)
Main
gas
valve
(V1)
2) LC3 limit control
8) Venter motor
3) Burner operating LED
9) Limit control LC1
4) Reset burner lockout
10) Flame sensor (IS)
5) Spark ignitor (ER)
11) Modulating gas valve (VM)
6) Control
panel
Summary of Contents for Reznor VRA-4E Series
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