AUXILIARY LOW WATER CUTOFF - Patterson-Kelley€¦ · AUXILIARY LOW WATER CUTOFF . When used with...
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SERVICE BULLETIN Author: Jerry Spott Approved by: Dave Connors Distribution: RSM’s, All Boiler Reps cc: HIP-K Operations © 2014 Harsco Corporation. All Rights Reserved Page 1 of 3 Bulletin: ENVI-2014-01 Date: 02/19/2014 Supercedes: N/A AUXILIARY LOW WATER CUTOFF When used with ENVI ® Boiler Controller • When installing the PK #8622150050 manual reset Low Water Cut-Off (LWCO) as an auxiliary device; the probe must be installed in the supply line at a point higher than the highest point of the boiler. Refer to the control manufacturer’s installation instructions included with the control for piping/mounting options and limitations. Refer to wiring diagrams specific to boiler type on pages 2 and 3 of this bulletin for additional wiring information. WARNING: SEPARATE POWER CIRCUITS FOR LWCO CONTROL AND ENVI CIRCUIT. BE SURE TO REMOVE JUMPER BETWEEN TERMINALS H AND P1 “IF INSTALLED” ON LWCO. • On Forced Draft Boilers: o Use wiring diagram B3 on page 2 of the control manufacturer’s installation instructions. Be sure to remove the jumper between H and P1 “if installed” on the low water cutoff. o Supply power to the control from the 120V switched output HVTB-13 & Neutral HVTB-5 on the PK Forced Draft boiler by wiring to terminals 1 & 2 on the LWCO. o Remove the factory installed jumper wire from LVTB-3 & LVTB-4 on the P-K boiler and wire the control circuit interlock LVTB-3 & LVTB-4 to terminals P1 & P2 on the LWCO. o Refer to wiring diagram specific to Forced Draft boiler on page 2 of this service bulletin for additional wiring information. • On MACH and SONIC Boilers: o Use wiring diagram B3 on page 2 of the control manufacturer’s installation instructions. Be sure to remove the jumper between H and P1 “if installed” on the low water cutoff. o Supply power to the control from the 120V switched output HVTB2-10 & Neutral HVTB2- 7 on the PK MACH boiler by wiring to terminals 1 & 2 on the LWCO. o Remove the factory installed jumper wire from LVTB1-3 & LVTB1-4 on the PK boiler and wire the control circuit interlock LVTB1-3 & LVTB1-4 to terminals P1 & P2 on the LWCO. o Refer to wiring diagrams specific to MACH & SONIC boiler on page 3 of this service bulletin for additional wiring information.
Transcript of AUXILIARY LOW WATER CUTOFF - Patterson-Kelley€¦ · AUXILIARY LOW WATER CUTOFF . When used with...
SERVICE BULLETIN
Author: Jerry Spott Approved by: Dave Connors Distribution: RSM’s, All Boiler Reps
cc: HIP-K Operations © 2014 Harsco Corporation. All Rights Reserved Page 1 of 3
Bulletin: ENVI-2014-01 Date: 02/19/2014 Supercedes: N/A
AUXILIARY LOW WATER CUTOFF When used with ENVI® Boiler Controller
• When installing the PK #8622150050 manual reset Low Water Cut-Off (LWCO) as an auxiliary
device; the probe must be installed in the supply line at a point higher than the highest point of the boiler. Refer to the control manufacturer’s installation instructions included with the control for piping/mounting options and limitations. Refer to wiring diagrams specific to boiler type on pages 2 and 3 of this bulletin for additional wiring information.
WARNING: SEPARATE POWER CIRCUITS FOR LWCO CONTROL AND ENVI CIRCUIT. BE SURE TO REMOVE JUMPER BETWEEN TERMINALS H AND P1 “IF INSTALLED” ON LWCO.
• On Forced Draft Boilers:
o Use wiring diagram B3 on page 2 of the control manufacturer’s installation instructions. Be sure to remove the jumper between H and P1 “if installed” on the low water cutoff.
o Supply power to the control from the 120V switched output HVTB-13 & Neutral HVTB-5 on the PK Forced Draft boiler by wiring to terminals 1 & 2 on the LWCO.
o Remove the factory installed jumper wire from LVTB-3 & LVTB-4 on the P-K boiler and wire the control circuit interlock LVTB-3 & LVTB-4 to terminals P1 & P2 on the LWCO.
o Refer to wiring diagram specific to Forced Draft boiler on page 2 of this service bulletin for additional wiring information.
• On MACH and SONIC Boilers: o Use wiring diagram B3 on page 2 of the control manufacturer’s installation instructions.
Be sure to remove the jumper between H and P1 “if installed” on the low water cutoff.
o Supply power to the control from the 120V switched output HVTB2-10 & Neutral HVTB2-7 on the PK MACH boiler by wiring to terminals 1 & 2 on the LWCO.
o Remove the factory installed jumper wire from LVTB1-3 & LVTB1-4 on the PK boiler and wire the control circuit interlock LVTB1-3 & LVTB1-4 to terminals P1 & P2 on the LWCO.
o Refer to wiring diagrams specific to MACH & SONIC boiler on page 3 of this service bulletin for additional wiring information.
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Page 3 of 3
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REMOVE JUMPER
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