John Wood SpaceSaver (2.5 Gallon) - Manual (Page 6)

6
Water System Piping
Piping, fi ttings, and valves should be installed according to
the installation drawing (Figure 4). If the indoor installation
area is subject to freezing temperatures, the water piping
must be properly insulated.
Water supply pressure should not exceed 550kPa (80psi).
If this occurs a pressure limiting valve with a bypass may
need to be installed in the cold water supply line. This
should be placed on the supply to the entire house in order
to maintain equal hot and cold water pressures.
IMPORTANT:
•
Heat must not be applied to the water fittings on the
heater as they may contain nonmetallic parts. If solder
connections are used, solder the pipe to the adapter
before attaching the adapter to the hot and cold water
fittings.
• Always use a good grade of joint compound and be
certain that all fittings are tight.
Piping Installation
1. Install the water piping and fittings as shown in Figure
6. Connect the cold water supply (1/2” NPT) to the
fitting circled with a BLUE collar. Connect the hot water
supply (1/2” NPT) to the fitting circled with a RED collar.
2. The installation of unions in both the hot and cold water
supply lines are recommended for ease of removing
the water heater for service or replacement. To protect
against untimely corrosion of hot and cold water
fittings, when connected to copper pipe, it is strongly
recommended that dielectric unions or couplings be
used.
3. Some local codes may require, and the manufacturer
of this water heater recommends, installing a tempering
valve or an anti-scald device in the domestic hot water
line as shown in Figures 4 and 6. These valves reduce
the point-of-use temperature of the hot water by mixing
cold and hot water and are readily available. Contact
a licensed plumber or the local plumbing authority for
more information.
4. If installing the water heater in a closed water system,
install an expansion tank in the cold water line as
specified under “Closed System/Thermal Expansion.”
Figure 4
Installation
Details
UNION
COLD
(INLET)
HOT
(OUTLET)
TEMPERATURE-PRESSURE
RELIEF VALVE
DISCHARGE
PIPE
Figure 6
Water Piping
Installation
COLD
(INLET)
HOT
(OUTLET)
TEMPERATURE-
PRESSURE
RELIEF VALVE
DISCHARGE
PIPE (DO
NOT CAP
OR PLUG)
TEMPERED
WATER
MIXING
VALVE
Figure 7
Installation
Side View
WALL
HOOK
Figure 5
Installation
Front View
UNION
COLD
(INLET)
HOT
(OUTLET)
TEMPERATURE-PRESSURE
RELIEF VALVE
DISCHARGE
PIPE (DO
NOT CAP
OR PLUG)
FLOOR DRAIN
TERMINATE 300mm
(12 in.) (CAN.), 6 in.
(150mm) (U.S.A.),
MAX. ABOVE
FLOOR DRAIN OR
EXTERNAL TO THE
BUILDING.