page no. 45 of 68
CPx Range Users, Installation & Servicing Instructions Doc Ref M201 issue 2.9 Nov 2018.
5b.
CPx 200 - CPx 250 ONLY
Hi/Low operation works on the basis that either a single
or both nozzles are open. Adjust the pump pressure
by rotating the burner adjustment screw clockwise (+
positive), anticlockwise (- negative)
RG1RKD-RG4D Pumps
HIGH
FIRE
ADJUSTMENT
HIGH FIRE
ADJUSTMENT
LOW FIRE
ADJUSTMENT
RG5D Pump only
6. Re-check If any adjustments have been made.
1. Remove the electrical connections from the gas control
block.
2. Release the nuts securing the inlet and outlet flanges to
the gas control block and lift out the gas control block. Fit
the replacement assembly in reverse order ensuring the
valve is correctly orientated for the direction of gas flow.
IMPORTANT:
On 3ph heaters fitted with 3ph main fan
motors ensure that the fan direction of
rotation corresponds with the direction of
rotation arrow on the fan guard or case. If necessary
reverse the direction of rotation by interchanging any
two of the motor live leads at the terminal strip in the
electrical panel. Should it be necessary to remove one or
more of the fans for cleaning proceed as follows
NOTE:
These heaters are fitted with direct
drive fan units.
1. Remove the lower panels of the heater to gain access
to the fan section.
2. Disconnect the fan motor electrical leads from the
terminal strip - see section 2.5 or the accompanying
wiring diagram.
3. Remove the two screws, one on each side of the fan
mounting flange, that secure the fan to the fan shroud.
4. Remove the screws securing the heat exchanger
mounting frame to the fan shroud on the side that the fan
is going to be withdrawn.
5. Withdraw the fan from the slide rails.
6. Reassemble in reverse order.
NOTE:
These units are fitted with belt driven
main air fans.
1. Remove the lower panels of the heater to gain access
to the fan section.
2. Release the motor mounting plate securing screws
and then remove the belt tension by turning the tension
adjustment screw anticlockwise. Remove the fan belts.
3. Remove the screws securing the fan mounting feet
to the heater framework and remove the fan. It may
be necessary to re-orientate the fan within the fan
compartment and also to release the fan shroud fixings in
order to pass the fan through the heater frame. On units
with twin or triple fan sets on a common fan shaft it will
be necessary to first remove the fan shaft.
4. Inspect the fan belts and if necessary replace with new.
5. Replace components in reverse order.
6. Do not over tension the fan belts. There should be
approximately 15mm of deflection when downward
pressure is applied to the belt(s) halfway between the
motor and fan pulleys.
