14
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Using the cable clamp:
Clamping bars are provided on the control unit for termination of cable screens where necessary. The
cable should be prepared by cutting around the outer sleeve, taking care not to damage the shield (1).
Pull the sleeving apart to expose 3/8" (10mm) of the screen (2). Slide the exposed length of shield
between the clamping bars (3). Refer to figure 7.
FIGURE 7.
EARTH connection:
Make the earth connection to the unit using the earth stud provided. Ensure that a good electrical
connection is made both between the control unit and the burner panel and between the burner panel
and earth. Where necessary, scrape any paint away from connection points and use locking star
washers to obtain a reliable electrical connection. Always use the largest cross-sectional area earth
wire possible.
LINE (HOT and NEUTRAL) supply:
The LINE (HOT/L1) and NEUTRAL (N/L2) must
be connected using multi-strand single conductor
PVC insulated 16, 18, 20 AWG, 600V 90°C
(16/.02mm)wire. Wiring must comply with all
applicable codes, ordinances and regulations and
where required must comply to NEC Class 1 (Line
Voltage) wiring.
*If a fuse greater than 4A is used, each relay (pump, fan and vent) output supplied via this ter-
minal MUST be separately fused at 4A maximum, to protect the relay contacts from ‘welding’.
Burner fan output:
The burner fan output must be connected to the external
motor contactor using multi-strand single conductor
PVC insulated 16, 18, 20 AWG, 600V 90°C (16/
0.2mm) wire. Wiring must comply with all applicable
codes, ordinances and regulations and where required
must comply to NEC Class 1 (Line Voltage) wiring.
If a fuse greater than 4A is used in the supply to the unit, the burner fan output terminal
MUST be separately fused at 4A maximum, to protect the relay contacts from ‘welding’.
3/8" (10mm)
1.
2.
MAX 6A*
NEUTRAL (N)
LINE (HOT)
NEUTRAL PB 4
SUPPLY PB 5
CONTACTOR
NEUTRAL
BURNER FAN PB12
