0108MLOOGBEN
13
C) The fan impeller is attached to the motor shaft
by a ∅ 4.0 mm socket grub screw. This can
be released using a 2 MM AF hexagon wrench
(allen key).
D) It should be noted that a groove is machined
on the outer end of the motor shaft figure 8
when the fan impeller is pushed onto the motor
shaft until the groove is visible the correct end
location of the fan impeller into the fan scroll is
assured. Ensure the securing grub screw is
tight after service.
E) Check condition of motor and note especially
for excessive end float of motor shaft, which
could indicate wear.
8.10 To renew thermal overheat control LC3. Fig. 10 key
12.
8.10.1 A) Disconnect wires at terminals on control
B) Access capillary bulb through air outlet louvres
and un-clip from its bracket. If ducted via access
panel.
C) Unscrew Qty 2 screws which secure sealing
plate. Fig. 7 key 12.
D) Remove reset push button cover cap.
E) Unscrew hexagon retaining nut and remove
control.
N.B. : When fitting a new thermal overheat control
do not bend capillary on a less than 20 mm radius.
8.11 To renew combustion air proving pressure
differential switch Fig. 7 key 7.
A) Disconnect wires leading to terminals
B) Disconnect reference port tubes at pressure
switch end
C) Remove Qty. 3 screws securing mounting
bracket to air heater
D) Pressure switch fixing screws are now
accessible from rear of mounting bracket.
N.B.1: Ensure reference port tubes are correctly
reconnected when replacing or renewing pressure
switch:
Port P1 on switch to lower reference Key 6.
Port P2 on switch to top reference Key 6
N.B.2 : Combustion air proving switch operating
pressures.
Cutout = 68 Pa.
To check this it is necessary to connect a
manometer in the air sensing circuit by use of a φ
9.0 mm tee piece fitting; ensure a positive seal is
maintained.
The switch should not be adjusted for any reason.
The unique part number of this device ensures the
correct differential pressure is maintained thus
assuring good combustion.
8.12 To renew electronic burner control Fig. 10 key 14.
A) Disconnect wires at control end leading to
ignition device. Fig. 7 key 17.
B) Carefully unplug multi-point terminal connectors
by pulling off key 14.
C) To remove unscrew Qty. 2 control fixing screws
D) Control is now released.
N.B. : This is not a repairable item therefore, no
attempt should be made to do so. Replacements of
this unique specification must be obtained from
Reznor.
8.13 To renew or replace thermal fan control fig. 10 key
11 and/or thermal limit control fig. 7 key 8, simply
disconnect the "Faston" wire terminals and unscrew
Qty 2 screws in each device to remove from air
heater casing.
8.14 To renew or replace Ignition device assembly fig. 10
key 17 and Fig.9.
A) Disconnect lead wires at burner control end.
Fig. 7 key 14.
B) Unscrew Qty. 2 screws securing the assembly
to the air heater
D) Withdraw the assembly carefully from the
combustion chamber.
8.15 After completion of any service or maintenance
work re-commission the air heater in accordance
with section 5 of this document.
8.16 Check functionality of external controls and reset in
accordance with users preferences.
End of servicing instructions
To Next Page
Loading...
Need help?
General
