Instructions / Assembly

37
WHL-004 REV. 5.26.17
2. When low fire settings have been obtained, flip DIP switch seven (7) to its original (OFF) position. This will return the appliance to
normal mode.
3. Flip DIP switch six (6) to ON (high fire). Again check combustion readings with a combustion analyzer.
4. When complete, flip DIP switch six (6) to its original (OFF) position. This will return the appliance to normal mode. Shut off water at
hot water faucet.
5. Allow appliance to operate normally. Ensure it is operating properly.
6. Reinstall the appliance front cover.
PART 8 – WATER PIPING
A. GENERAL PLUMBING CONNECTION GUIDELINES
 Pipe material must be suitable to meet local codes and industry standards.
 The pipe must be cleaned and without blemish before any connections are made.
 Do not apply a torch within 12” of the bottom connections of the water heater. Doing so could damage the water heater. Such
damages ARE NOT covered by product warranty.
 The size of the hot water pipe should be ¾” diameter.
 Isolation (shutoff valves) should be used to ease future servicing.
 All piping should be insulated.
B. INSTALL A BACKFLOW PREVENTER
It may be recommended to use a back flow preventer – check local codes. If a back flow preventer or a no return valve is used, a
thermal expansion tank must be installed on the cold water supply between the water heater and valve.
To control thermal expansion, a thermal expansion tank should be installed in systems with an installed backflow preventer. DO NOT
use a closed type expansion tank. Follow expansion tank manufacturer’s specifications to properly size an expansion tank to the
installation. Failure to properly accommodate thermal expansion could result in property damage, severe personal injury, or death.
C. PIPING THE WATER HEATER
Use at least the MINIMUM pipe size for all water heater loop piping This is to avoid the possibility of inadequate flow through the water
heater. Using less than the required minimum pipe size and piping could result in system problems, property damage, and premature
water heater failure. Such problems ARE NOT covered by product warranty.
Use both thread tape and pipe dope to connect to the ¾” domestic water inlet and outlet. Tankless isolation valves between the city
water supply and tank inlet are recommended for ease of service.
D. APPLICATIONS
Figure 25 – Piping Symbol Legend
DO NOT use this water heater for high temperature (over 140
o
F) central heating applications. Failure to comply will result in substantial
overworking of the appliance, and possibly lead to early appliance failure and property damage. Use of the water heater for high
temperature central heating applications WILL VOID the warranty.