41
110331-07 - 8/23
PHTM II
Combi Installation, Operating & Service Instructions
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 r
esult in component failur
e and
pr
oper
ty damage.
11
Domestic Water Piping
(continued)
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 1070 listed anti-
scald valve is r
equir
ed as par
t of this boiler’
s installation when
DHW r
ecir
culation issued.
!
!
Figur
e 1
1-3:
DHW Piping with R
ecir
culation
NO
TICE:
Additional wiring and contr
ol settings r
equir
ed for DHW
recir
culation:
•
Connect r
ecir
culation pump to "Aux Pump" ter
minals per Figur
e 13-2.
•
Connect jumper
, time of day clock or momentar
y push button to "Aux
T'Stat" ter
minals per Figur
e 13-3.
•
Secur
e r
ecir
culation temp sensor close to boiler on cold water line.
•
Connect r
ecir
culation temperatur
e sensor to "Header Sensor" ter
minals
per Figur
e 13-3.
•
Change
A02
Recir
c (Comfor
t) Mode to 'ON' See T
able 16-11.
• Change
S05
(Auxiliar
y Ther
mostat Input Select) to '0' (Recir
culation
Enable). See T
able 16-13.
• Change
P03
(Auxiliar
y Pump Output Select) to '1' (Recir
culation
Pump) See T
able 16-15.
NO
TICE:
W
ater filter to pr
event scale is str
ongly r
ecommended on the
potable cold water supply line to minimize sediment build up and loss of
per
for
mance of the plate heat exchanger
.
A
DHW
Pressure
Relief Valve
Drain
Valve
Buffer Tank
(2-6 Gal.)
(optional)
Drain
Valve
ASSE 1070 Listed
Anti-Scald Valve
(required)
Cold Water Supply
Recirc. Temp. Sensor
(P/N 108703-01)
Expansion Tank
(Req'd if cold water supply line
has check valve)
Flow Check
Valve
Recirc.
Pump
Hot Water
To Fixtures
*Supplied with boiler
DHW Strainer*
(inside boiler)
DHW Flow Limiter*
(inside 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 (From Boiler)
Hot Water To Fixtures