3
LP-83 Rev. 3.24.14
PART 3
– HEATER PIPING ....................................................................................................................................................... 11
A. PLUMBING ............................................................................................................................................................................... 11
B. BOILER CONNECTIONS ......................................................................................................................................................... 11
C. DOMESTIC PIPING INLET ....................................................................................................................................................... 11
D. TEMPERATURE AND PRESSURE RELIEF VALVE................................................................................................................ 11
E. SCALDING ................................................................................................................................................................................ 12
F. POTABLE EXPANSION TANK ................................................................................................................................................. 13
G. PRESSURE DROP SIZING FOR CIRCULATOR ..................................................................................................................... 13
H. PIPING ...................................................................................................................................................................................... 14
PART 4
– HEATER CONTROL AND WIRING .......................................................................................................................... 23
A. CONTROL ................................................................................................................................................................................ 23
B. WIRING ..................................................................................................................................................................................... 23
C. WIRING DIAGRAMS ................................................................................................................................................................ 24
PART 5
– START-UP AND OPERATION.................................................................................................................................. 31
PART 6
– MAINTENANCE AND TROUBLESHOOTING .......................................................................................................... 33
HTP CUSTOMER INSTALLATION RECORD FORM...................................................................................................................... 35
PART 1 – GENERAL SAFETY INFORMATION
A. PRECAUTIONS
This water heater is approved for indoor installations only, and it not intended for use as a pool heater. Clearance to combustible
materials: 0” top, bottom, sides and back. Heater must have room for service: 24” front and 6” sides are minimum recommended
service clearances. (A combustible door or removable panel is acceptable front clearance.) This water heater has been approved for
closet installation, and installation on combustible flooring. Install the water heater in a location where temperature and pressure relief
valve discharge or a leak will not result in damage to the surrounding area. If such a location is not available, install an auxiliary catch
pan.
INSTALLER
– Read all instructions in this manual before installing. Perform steps in the order given.
USER
– This manual is for use only by a qualified heating installer/service technician. Have this heater serviced/inspected by a
qualified service technician annually.
FAILURE TO ADHERE TO THE GUIDELINES ON THIS PAGE CAN RESULT IN SUBSTANTIAL PROPERTY DAMAGE, SEVERE
PERSONAL INJURY, OR DEATH.
NOTE: If the heater is exposed to the following, do not operate until all corrective steps have been made by a qualified serviceman:
1. FIRE
2. DAMAGE
3. WATER
Any claims for damage or shortage in shipment must be filed immediately against the transportation company by the consignee.
High heat sources (sources generating heat 100
o
F / 37
o
C or greater, such as stove pipes, space heaters, etc.) may damage plastic
components of the water heater as well as plastic vent pipe materials. Such damages ARE NOT covered by warranty. It is
recommended to keep a minimum clearance of 8” from high heat sources. Observe heat source manufacturer instructions, as well as
local, state, provincial, and national codes, laws, regulations and ordinances when installing this water heater and related components
near high heat sources.