System Piping - Radiant Heating With Mixing Valves; System Piping - Multiple Units Installation; Primary Piping Diagrams - Delta Performance PG-25 Installation And Maintenance Manual

Primary Piping
System Piping - Radiant Heating with Mixing
Valve
Connect the PERFORMANCE to the system
piping as shown with a radiant system using
a thermostatic mixing valve as shown in Fig.
14 page 25. The primary / secondary piping
ensures sufficient return temperature to the
PERFORMANCE.
NOTICE
If the radiant system tubing contains no
oxygen barrier, a stainless steel heat
exchanger must be used. Failure to
install a heat exchanger could lead to
premature failure of the outer tank and
void any warranty claim.
WARNING
Radiant heating system piping should
include a means of regulating the boiler
return water. The return water tempera-
ture to the unit should be maintained at
130ºF or higher. Failure to prevent low
return water temperature to the unit
could cause premature failure of the unit
and it's burner system resulting in severe
personal injury, death or substantial
property damage.
Size the heating system piping and circula-
tor to provide the flow needed for the radiant
system.
To control the zone circulators reference
Figure 34, page 47.
NOTICE
To ensure adequate flow rate through
the PERFORMANCE, maintain a mini-
mum 1 inch diameter on the system pip-
ing connecting the unit to and from the
primary / secondary connection.

System Piping - Multiple Units Installation

Use a balance manifold system as the pri-
mary / secondary connection to the space
heating piping as shown in Fig. 16 page 26.
Refer to Fig. 11 page 23 to install air elim-
ination and expansion tank.
For the space heating piping refer to the
applications mentioned in this manual or
use recognized design methods.
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