40
ALTA
Combi Installation, Operating & Service Instructions
110327-07 - 2/23
C
A
UTION
Component and P
roper
ty Dama
g
e.
• Excessive heat fr
om soldering could damage
gaskets at connection between DHW adapters and boiler
. Solder connections to DHW adapters befor
e
installing gaskets.
• DHW pr
essur
e r
elief valve (and when appr
opriate-
expansion tank) r
equir
ed to pr
otect inter
nal boiler
components. Failur
e to addr
ess these items could
result in component failur
e and pr
oper
ty damage.
11
Domestic Water Piping
(continued)
Figur
e 1
1-2:
Standar
d DHW Piping
NO
TICE
: W
ater filter to pr
event scale is str
ongly
recommended on the potable cold water supply line to minimize sediment build up and loss of per
for
mance of
the plate heat exchanger
.
A
Cold Water Supply
Hot Water To Fixtures
Expansion Tank
(Req'd if cold water
supply has check valve)
Drain
Valve
Drain
Valve
DHW
Pressure
Relief Valve
ASSE 1017 or ASSE 1070
Listed Tempering Valve
(required)
DHW Flow Limiter*
(inside boiler)
DHW Strainer*
(inside boiler)
*Supplied with boiler
DHW Adapters* (G 1/2" to 3/4" sweat)
Water Filter
Aqua Pure AP430SS or equivalent
(highly recommended)
Detail A
(Scale 1 : 4)
Cold Water Supply
Hot Water To Fixtures
Hot Water
(From Boiler)
NO
TICE
: Heating System piping omitted for clarity
.
NO
TICE
: Installer is r
esponsible for piping
configurations to pr
ovide pr
oper flow rates and meet
local codes.
D
ANGER
Scald Hazar
d.
Under cer
tain conditions this boiler
can deliver domestic hot water (DHW) at temperatur
es
in excess of DHW setpoint in boiler contr
ol. A field
supplied ASSE 1017 or ASSE 1070 listed tempering valve is r
equir
ed as par
t of this boiler’
s installation.
!
!
