8.0 Installation
22
8.8
Making The Electrical Connections
WARNING:
This appliance must be earthed
1. The electrical connections are on the right hand
side of the unit inside the electrical box.
2. Undo the two screws securing the electrical box
cover and remove the cover (Fig. 31).
3. Undo the two screws securing the SL, , N, PF
cable clamp and place to one side (Fig. 32).
4. If fitting an integral programmer kit please refer
to kit instructions at this stage.
5. The boiler is factory set to give a maximum
output of 22.0 kW (75,000 Btu/hr). The Control
PCB jumper positions are as follows:
J1 In
J2 In
J3 In
If the installation requires a greater output to
achieve the desired room temperature, this can be
increased to 31.18 kW (103,000 Btu/hr) and the
boiler can be adjusted as follows:
a) Draw the control PCB forwards out of the
electrical box (the control PCB is the right
hand board).
b)
Remove all three jumpers.
c)
Replace the PCB and continue with the
installation.
If the boiler is to be used in conjunction with a
Thermal Store, the boiler can be adjusted as
follows:
a) Draw the control PCB forwards out of the
electrical box (the control PCB is the right
hand board).
b)
Remove jumper N
o
2.
c)
Replace the PCB and continue with the
installation.
6. Route the incoming electrical cable/s through
the grommet in the support bracket. This will
prevent damage to the cable (Fig. 31a).
7. Lay the cable through the cable clamp to gauge
the length of cable required when it is connected
to the 4-way terminal block (Fig. 32).
8. Connect the (S/L), (N) and ( ) wires to the
4-way terminal block and refit the cable clamp
(Fig. 33).
9. The pump can be wired directly to the system
controls or to the P/F connector on the boiler. For
full TRV installation refer to section 6.1.
10.
The P/F connection should only be used on
a full TRV system without a bypass.
11. Check the electrical installation for;
earth continuity, short circuits, resistance to earth,
correct polarity and fuse failure.
12. Replace the electrical box cover and secure.
HIG
H
LO
W
Fig. 31
Fig. 31a
Fig. 32
Fig. 33
S/L
N
Electrical Box
Cover
Cable Clamp
Grommet
Electrical box shown
removed for clarity
P/F
Control PCB
Jumper 2
Fig. 32a
Jumper 1
Jumper 3
Summary of Contents for 100 He
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