Boiler house Heat recovery systems
2
Electrical connection Pump Contactor overload protection is not required for these pumps. A 3 amp fuse must be fitted in conjunction with a proprietary switch capable of disconnecting the electricity supply to the motor: - The cable size to be used is 3-core, 0.75 mm ² . - The cable should be capable of withstanding a minimum temperature of 80 ° C. - Remove the terminal box screw and cover. - Thread the cable through the gland and connect as indicated in the wiring diagram. - Tighten the cable gland to ensure that the cable is gripped securely. - Replace the terminal box cover and fasten securely. WARNING : This pump must be earthed. HTS3 Run sufficient 3-core electrical connecting cable to reach the HTS3 installation position without being under tension. - Remove the HTS3 cover by undoing the central retaining screw and connect the cable as shown in Figure 6, HTS3 Wiring diagram. - Replace and secure the cover.
2.8 6
- The HTS3 is double insulated and no earth connection is required. WARNING : Disconnect mains supply before removing the cover.
Thermostat HTS3
Fig. 6 HTS3 Wiring diagram - When hot 2 and C make contact Pump
AI-P404-07 AB Issue 7
Page 6 of 8
Boiler Blowdown Heat Recovery Systems - Installation, Operation and Maintenance
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