Hi all i am after some advice on replacing a CH pump for a friend. The ch pump is a Commodore 130-45 (SMC) measured the length and its the standard 130mm length. There are 2 2" iso valves either side, the top one looks in good nick, the bottom one as been slightly corroded by a weeping gate valve and the union does look in top class condition. The programmer is a very old Randall 30-20p. Drain off just under the pump and the system by the looks of it is a back boiler with gravity fed hotwater/ pumped CH. Just wanted some clarification or advice on the steps that need to be taken.
1. Turn off boiler, turn down room stat and any other external controls.
2. Drain the CH circuit via the drain off under the pump.
3. Remove pump and iso valves.
4. Fit new iso valves,pump and reconnect electrical supplies to programmer. With electrical connections on the top of the pump.
5. Refill system and add inhibitor.
6. Test pump.
I noticed on the pump that the arrow is facing downwards on the pump, isnt this incorrect and in fact it should be facing upwards ?. I guess ill also need a 2" pump spanner to remove the isolation valves?. Any advice or tips that you can give will be greatly appreciated.
Thank you.
1. Turn off boiler, turn down room stat and any other external controls.
2. Drain the CH circuit via the drain off under the pump.
3. Remove pump and iso valves.
4. Fit new iso valves,pump and reconnect electrical supplies to programmer. With electrical connections on the top of the pump.
5. Refill system and add inhibitor.
6. Test pump.
I noticed on the pump that the arrow is facing downwards on the pump, isnt this incorrect and in fact it should be facing upwards ?. I guess ill also need a 2" pump spanner to remove the isolation valves?. Any advice or tips that you can give will be greatly appreciated.
Thank you.
