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120 Braley Rd. P.O. Box 429 East Freetown, MA 02717-0429 www.htproducts.com
LP- 446 REV. 9.3.14
Mod Con VWH
INSTALLATION
START-UP
MAINTENANCE
PARTS
VWH Models
500 / 850
LP / HL / LPHL
THIS MANUAL IS FOR USE WITH MOD CON BOILERS MANUFACTURED AFTER
DECEMBER 1, 2012
Heat Exchanger Bears
the ASME “H” Stamp
Improper installation, adjustment, alteration, service, or maintenance could void product warranty and cause property damage, personal
injury, or death.
NOTICE:
HTP reserves the right to make product changes or updates without notice and will not be held liable for typographical errors
in literature.
The surfaces of these products contacted by consumable water contain less than 0.25% lead by weight, as required by the Safe
Drinking Water Act, Section 1417.
NOTE TO CONSUMER: PLEASE KEEP ALL INSTRUCTIONS FOR FUTURE REFERENCE.
This manual must only be used by a qualified heating installer/service technician. Read all instructions in this manual before installing.
Perform steps in the order given. Failure to comply could result in substantial property damage, severe personal injury, or death.
Summary of Contents for 500 HL
Page 12: ...12 LP 446 REV 9 3 14 Figure 2 Dimensions and Specifications ...
Page 21: ...21 LP 446 REV 9 3 14 H PIPING DIAGRAMS Figure 6 ...
Page 44: ...44 LP 446 REV 9 3 14 E GAS VALVE Figure 26 Mod Con 500 Gas Valve ...
Page 52: ...52 LP 446 REV 9 3 14 Figure 33 Mod Con Internal Connection Diagram LP 428 K ...
Page 71: ...71 LP 446 REV 9 3 14 Figure 36 ...
Page 72: ...72 LP 446 REV 9 3 14 Figure 37 ...
Page 73: ...73 LP 446 REV 9 3 14 Figure 38 ...
Page 74: ...74 LP 446 REV 9 3 14 Figure 39 ...
Page 77: ...77 LP 446 REV 9 3 14 ...
Page 78: ...78 LP 446 REV 9 3 14 ...