Circulator; Closet (Zero Clearance) Applications; Sizing Primary Piping; System Piping - Zone Circulators - Delta Performance PG-25 Installation And Maintenance Manual

Primary Piping
For proper operation of the expansion tank
and system, remove the factory installed
automatic air vent from the PERFOR-
MANCE and plug the connection. (See
Item 10, Fig. 46 page 70)
CAUTION
DO NOT install automatic air vents on a
closed-type expansion tank system. Air
must remain in the system and be
returned to the expansion tank to pro-
vide an air cushion. An automatic air
vent would cause air to be vented from
the system resulting in a water-logged
expansion tank.

Circulator

The PERFORMANCE is supplied with a
circulator that is pre-wired to allow for
domestic priority. Locate the circulator in
the return or supply piping as shown in the
piping diagrams included in this manual.

Closet (Zero Clearance) Applications

For applications in closets or zero clear-
ances, the installer may use the upper prima-
ry connection shown as Item 4 on page 70 as
a primary return connection. The air elimi-
nation, expansion tank and make-up water
system should then be piped directly into the
primary loop of the space heating prior to
the system circulator.

Sizing Primary Piping

See Figs: 12 through 15, pages 24 - 25, for
recommended piping arrangements based
on various applications. In all diagrams,
the space heating system is isolated from
the PERFORMANCE using primary / sec-
ondary piping connections.
Size the piping and system components
required in the space heating system using
recognized design methods.

System Piping - Zone Circulators

Connect the PERFORMANCE to the sys-
tem piping as shown in Fig. 12 page 24
when zoning with zone circulators. The
circulator supplied with the PERFOR-
MANCE should not be used for a heat
zone. It must supply only the primary loop.
Install a separate circulator for each zone of
space heating.
To control the zone circulators refer to Fig.
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 - Zone Valves

Connect the PERFORMANCE to the sys-
tem piping as shown in Fig. 13 page 24
when zoning with zone valves. The prima-
ry / secondary piping ensures the priority is
given to the production of domestic hot
water.
To control the system circulator refer to
Fig. 33, page 46.
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.
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