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BTH ULTRA Electric Boilers Installation & Operation manual (Revision: June 2015) 28.
Pressure relief valve
ZMC200-SV30PSI1
Power relay 24Vac
ZEL100-24ACNO30
4 poles Contactor 24Vac
ZEL100-4P50A24
Temperature and
Pressure Indicator
ZMC300-75P160CN
Transformer 208/240V x
24Vac
ZEL400-20842450 (50VA)
Fuse
ZEL250-TDMIDJ5
UltraSmart Controller
ZEL100-ULTRA
Breaker
ZEL900-2P100A
Figure 22 : Spare parts (front, 33-36 KW)
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