Water Connections; Electrical Connections - Bosch WH36 Installation Manual And Operating Instructions

10 | Installation
4.4

Water connections

WARNING:
▶ Do not install a non-return check valve
within 10 feet of the inlet.
WARNING:
▶ Do not apply heat or solder to
connections or pipe if they are already
connected to the unit.
NOTICE: Disclaimer
▶ In the Commonwealth of Massachusetts
a pressure relief valve shall be installed
on the cold water side by a licensed
plumber. (MGL 142 Section 19,
Approval number P1-09-25).
▶ The heater must be connected directly to the main cold
water supply and not to pre-heated water. (The inlet
water temperature must not be greater than 86 °F).
▶ The heater must be installed with shutoff valves on both the
inlet and outlet connections.
▶ It is recommended that you use ¾ inch or ½ inch copper or
high-pressure flex connections.
▶ Do not use plastic piping within 3 feet on either side of
heater.
▶ Use Teflon tape for sealing pipe threads. Do NOT use pipe
dope.
▶ Remember to keep the hot water pipe runs as short as
possible.
After the heater has been plumbed, and before you wire it,
flush it with water to remove any debris or loose particles.
Heater must be full of water and air purged before power is
turned on. Failure to do so may result in damage to the
product that is not covered by warranty.
▶ After flushing and filling the heater with water, (with power
off) disconnect the inlet connection and inspect the filter
screen for any debris that may have been flushed through
the system.
The inlet and outlet connections are clearly
marked on the heater. They each have a
¾ inch NPT connector.
▶ Check the pressure of the main water supply. To operate
correctly, the heater needs the running pressures
mentioned in 5.
6 720 647 022 (2013/04)
4.4.1 Water quality
Water quality can have an impact on appliance longevity and
may not be covered under the manufacturer's warranty.
▶ For water analysis data call your local water department, or
if on a well, have well water analyzed periodically.
If water quality exceeds one or more of the values specified
below, Bosch recommends consulting a local water
treatment professional for water softening/conditioning
options.
Description
pH
TDS (total Dissolved Solids) mg/l or ppm
Total hardness
Aluminum
Chlorides
Copper
Iron
Manganese
Zinc
Table 7
4.5

Electrical connections

WARNING:
▶ The unit must be wired by a qualified
electrician, in accordance with the
current version of the National Electrical
Code US) or Canadian Electric Code
(Canada).
When the heater is not within sight of the
electrical circuit breakers, a circuit breaker
lockout or additional local means of
disconnection for all non-grounded
conductors must be provided that is within
sight of the appliance. (Ref NEC 422.31.).
Max. Levels
pH 6.5 - 8.5
500
mg/l or ppm 100
(6 grains)
mg/l or ppm 2.0
mg/l or ppm 250
mg/l or ppm 1.0
mg/l or ppm 0.3
mg/l or ppm 0.05
mg/l or ppm 5.0
Tronic 5000C