Delta 45, F-25, 35, 30, 40 warranty Primary Piping, Circulator, Notice

Primary Piping

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 ELITE 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 Fig. 28 on page 50 as a primary return connection. The air elimination, 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 Fig. 8 through 11, pages 21 - 22, for recommended piping arrangements based on various applications. In all diagrams, the space heating system is isolated from the ELITE using primary / secondary pip- ing connections.

Size the piping and system components required in the space heating system using recognized design methods.

System Piping - Zone Circulators

Connect the ELITE to the system piping as shown in Fig. 9 page 21 when zoning with zone circulators. The circulator supplied with the ELITE should not be used for a heat zone. It must supply only the prima- ry loop.

Install a separate circulator for each zone of space heating.

To control the zone circulators refer to Fig. 19, page 35.

NOTICE

To ensure adequate flow rate through the ELITE, maintain a minimum 1 inch diameter on the system piping connect- ing the unit to and from the primary / secondary connection.

System Piping - Zone Valves

Connect the ELITE to the system piping as shown in Fig. 9 page 21 when zoning with zone valves. The primary / secondary pip- ing ensures the priority is given to the pro- duction of domestic hot water.

To control the system zone valve refer to Fig. 18, page 34.

NOTICE

To ensure adequate flow rate through the ELITE, maintain a minimum 1 inch diameter on the system piping connect- ing the unit to and from the primary / secondary connection.

System Piping - Radiant Heating with Mixing Valve

Connect the ELITE to the system piping as shown with a radiant system using a thermo- static mixing valve as shown in Fig. 11 page

22.The primary / secondary piping ensures sufficient return temperature to the ELITE.

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