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Installation 6
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Installation and Servicing Instructions Logamax plus GB142-24/30/45/60 • Version 12/2004
Buderus Hydronic Systems • http://www.buderus.net
Appliance with external tank
z Connect the external hot-water tank according to the
Installation instructions of the hot-water tank and
fittings concerned.
Piping examples
The following illustrations are two Installation examples.
Piping and field components must be field verified.
z Install a low water cut-off (LWCO) when required by
local code or when the appliance is installed above
piping level.
Fig. 10 is a schematic representation of fig. 9.
Fig. 10 Schematic representation of the appliance with the
hydronic set
pos. 1: DHW supply
pos. 2: drain valve
pos. 3: pump manifold shut-off valves
pos. 4: secondary supply
pos. 5: DHW return
pos. 6: secondary return
GB142GB142
FLUE GAS
PT
AIR INTAKE
pump manifold
1
4
5
6
2
3
NOTICE
The following illustrations are simplified
conceptual illustrations only.
NOTICE
If this water heater is installed in a closed water
supply system, such as one having a backflow
preventer in the cold water supply line, means
shall be provided to control thermal expansion.
Contact the water supplier or local plumbing
inspector on how to control this situation.
The seperate storage vessel must have a
temperature and pressure relief valve installed.
The relief valve shall comply with the Standard
for Relief Valves and Automatic Gas Shutoff
Devices for Hot Water Supply Systems, ANSI
Z21.22-CSA 4.4.
When the system requires water for space
heating at temperatures higher than required
for other uses, a means such as a mixing valve
shall be installed to temper the water for those
uses in order to reduce scald hazard potential.
15


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