Hamworthy STRATTON MK3 Series, Installation, Commissioning And Servicing Instructions

Page: 133 / 154

06.02.2023 133 / 154
STRATTON MK3 - Installation, Use and Maintenance
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12.1. Boiler mounted kits
12.1.1. UIN 235347 VFC PUMP CONTROL
Refer to the relevant sections of the Boiler installation manual as required
when carrying out the installation.
The Pump control kit converts the demand signal from a 230V relay QXn
output into a Volts Free enable signal for a circulating pump SELV Start/Stop
input signal.
12.1.1.1. Kit contents
1. QXn Mains Lead
2. VFC Pump Enable Lead
3. Relay 230 V 50 Hz
4. M3 x 16 machine screws 2 off
5. M3 nuts 2 off
12.1.1.2. Boiler installation
1. Drill out the existing right-hand side hole with a 3 mm drill.
2. Put the supplied machine screw through the 3 mm hole from the rear and
attach the nut loosely.
3. Attach the left-hand side (this is identified by the two electrical connections
brown and blue) of the relay onto the machine screw and tighten.
4. Align the relay level with the control housing and m rk the position of the
right-hand side fixing point.
5. Drill a 3 mm hole for the right-hand side fixing point of the relay, use the
machine screw and nut supplied to attach the relay to the control housing.
6. Connect the cables from the left-hand side of the relay onto the required
QXn, connection on the LHS boiler terminal strip.
7. Make sure that the right-hand side cable from the relay goes through the
provided cable clamp.