Specifications

CONNECTIONS – PLUMBING
39
PIPE SIZES
To achieve true mains pressure operation, the cold water line to the water heater should be the same size or
bigger than the hot water line from the water heater. The minimum recommended hot pipe size is DN20.
The pipe sizing for hot water supply systems should be carried out by persons competent to do so, choosing
the most suitable pipe size for each individual application. Reference to the technical specifications of the
water heater and local regulatory authority requirements must be made.
IN-SERIES BOOSTER – INTEGRATED
An insulated DN15 preformed copper pipe and braided flexible hose assembly is supplied for connecting
between the solar heated water outlet and a Vulcan 244 620 model in-series gas booster mounted onto the
solar storage tank.
Warning: A 627 model in-series gas booster cannot be mounted on the solar storage tank and may only
be installed remotely. The size and weight of the in-series gas booster may cause the solar storage tank to
topple over.
Notes:
Use thread sealing tape or an approved thread sealant on all
fittings.
Numbers in parentheses refer to items on diagram on page 39.
To mount the in-series gas booster to the solar storage tank:
Position the mounting bracket (7) at the top of the front panel of
the storage tank and secure with the four screws (8) provided.
Remove the mounting bolt (9) from the centre bottom of the
backing plate.
Remove the screws securing the top bracket at the rear of the
in-series gas booster, rotate the bracket through 180° and refit
the screws.
Fit the in-series gas booster to the mounting bracket by hooking
the top bracket of the gas booster over the mounting bracket.
Fix the in-series gas booster to the centre bottom of the
mounting bracket using the mounting bolt (9) provided.
To connect the preformed copper pipe to the solar
storage tank and in-series gas booster:
Fit the ¾” x ½” hex nipple (1) to the solar
heated water outlet of the solar storage tank.
Fit the ½” F x ½” M elbow (2) to the hex nipple
at the solar heated water outlet of the solar
storage tank.
Fit one end of the ½” x ½” female cone braided
flexible hose assembly (3) to the ½” F x ½” M
elbow (2).
Fit the ½” M x ½” C elbow fitting (4) to the other
end of the braided flexible hose.
Connect the short end of the insulated DN15
preformed pipe (5) to the ½” M x ½” C
elbow (4) using the compression nut and olive
provided with the elbow.
Connect the other end of the DN15 preformed
pipe to the inlet of the in-series gas booster
using the ¾” F x ½” C fitting union (6) and the
compression nut and cone olive provided.
mounting gas booster to solar storage tank
and connecting pipe work
CONTINUOUS FLOW GAS WATER HEATER
TOP BRACKET REPOSITIONING
REMOVE
SCREWS
ROTATE
BRACKET
180°
REFIT
SCREWS
repositioning top bracket on gas booster