Install Instructions

24
Domestic Piping
The domestic water volume of the
CHALLENGER is approximately 0.26
gallons [ 1 l]. Remember to include this
volume when sizing the expansion tank.
Water Hammer
Dishwashers, clothes washers and fast-closing
positive shut-off valves incorporated in the sys-
tem all contribute to creating water shock. Install
a water hammer arrester to prevent damage to
pipes and appliances. See device manufacturer’s
instructions for application and installation.
Vacuum Breaker - Storage Tank or SMART
Installations
Installing a vacuum breaker on the inlet of the stor-
age tank will prevent damage to the tank if a nega-
tive pressure is developed in the domestic supply
line. See manufacturer’s instructions for applica-
tion and installation of the vacuum breaker.
General Piping Requirements
• For domestic water piping diagrams, see
Figs 11 and 12, pages 26 and 27.
It is recommended to install flush valves
as outlined in Fig. 11 and 12, pages 26
and 27 for servicing the domestic coil.
It is recommended to install a strainer on
the domestic cold water inlet to prevent
any nuisance issues with domestic flow
switch. An optional lead free, 60 mesh y-
strainer is available through Triangle Tube
part number CCSTRA01, see Graph 4,
page 79 for strainer pressure loss curve.
• All plumbing must meet or exceed all local,
state and national plumbing codes.
• Use pipe joint compound or tape suitable
for potable water systems.
• Size all piping no smaller than the appli-
ance’s DHW connections.
• Use isolation valves to isolate the DHW
connections and system components.
• Use dielectric unions or couplings to pro-
tect hot and cold water fittings from corro-
sion when connecting dissimilar materials
such as copper and galvanized iron pipe.
• If copper pipe is used for domestic water
connections, first solder pipe to a threaded
adapter and then screw adapter onto the
domestic cold water inlet of the appliance.
The domestic cold water inlet contains an
internal plastic flow switch which can be
damaged by heat from soldering.
Do not apply heat to the domestic cold
water inlet when making solder connec-
tions to water heater. Solder tubing to
adapter before fitting adapter to cold
water inlet of heater. It is imperative that
no heat be applied to the cold water inlet,
as it contains a non metallic flow switch.
Thermostatic Mixing Valve
The CHALLENGER is factory supplied with a
thermostatic mixing valve with built-in check
valves on the hot and cold inlets. The mixing valve
must be installed as shown in Figs. 9, 11 and 12.
The mixing water temperature range of the
thermostatic mixing valve is 85ºF [30ºC] to
140ºF [60ºC].
The thermostatic mixing valve is preset to 120ºF
[49ºC] maximum mixed water temperature.
BEST PRACTICE
BEST PRACTICE
NOTICE