HAMWORTHY HEATING LTD
8
Merley Boiler Sequence Controller
500001210/D
2.2 General requirements
•
Air circulation around the controller must be ensured, allowing the unit to emit the heat produced by it.
A clearance of at least 10 mm must be provided for the controller's cooling slots which are situated on the
top and bottom of the housing.
The space should not be accessible and no objects should be placed there. If the controller is enclosed in
another (insulated) casing, a clearance of up to 100 mm must be observed around the cooling slots
The controller is designed conforming to the directives for safety class II mounted in compliance with these
regulations.
•
Electrical supply to the controller may only be switched on when the installation is completed. If this is not
observed, there is a risk of electric shock hazard near the terminals and through the cooling slots.
•
The controller may not be exposed to dripping water.
•
Permissible ambient temperature range when mounted 0..
-
50°C.
•
Power cables must be clearly segregated from low
-
voltage cables (sensors) observing a distance of at least
100 mm
2.3 Mounting Location
It is recommended that the control is mounted in a dedicated control panel capable of providing the necessary
power supply, electrical connections and electrical safety.
The control may be screw mounted to the electrical panel or alternatively (and preferred for convenience) onto a
suitable DIN rail.
Screwed
On DIN rail
2
3
5
9Z
09
A1
A2
B1
B2
2359Z11
A
mounting
B
removal
Note:
to mount the controller on a
DIN, a clip is required.
L
B
L1
B1
23
58
M0
1
2359Z10
x
(
dimensions in mm)
L
B
X
L1
B1
RVS63
…
281
121
70
270
110
2.3.1 Pre
-
assembled wall mounted panel
Should the Merley be supplied in the pre
-
assembled HHL panel, the panel should be located in a readily
accessible position and the following requirements observed;
•
External fuses should be rated for 10A
•
The panel must have individual means of isolation to provide complete electrical isolation
•
Power cables must be clearly segregated from low
-
voltage cables (sensors) observing a distance of at least
100 mm, using the cable 20mm glands supplied in the kit.
