Intertek FT Series - Zoning with Zone Valves and Indirect DHW Tank Pump

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4.16.5 Zoning with zone valves and indirect DHW tank pump.
O
I
L
E
R
(FACTORY
WIRED)
LLH
ZONE 1
MAKE UP
WATER
MULTIZONE HEATING, ZONE VALVES & INDIRECT TANK
ZONE 2
ZONE 3
A
B
INDIRECT H-X
BACKFLOW
PREVENTER
EXPANSION
TANK
PURGE
VALVE
AIR
ELIMINATOR
CHECK
VALVE
ISOLATION
VALVE
AIR
VENT
CIRCULATOR
REDUCING
PRESSURE
VALVE
RELIEF
VALVE
B
Circulation pump
Check valve
Zone valve
Pressure
reducing valve
Drain valve
Gate valve
Backflow preventer
Pressure Relief Valve
Expansion tank
Air separator
(Diaphragm-type)
Automatic air vent
Anti-scald rated
Mixing Valve
Check Valve
Shut-off valve
Circulation pump
with built-in IFC
1. This piping diagram is meant to show system piping concept only. Installer is responsible for all equipment
and detailing required by local codes.
2. The system return must be piped directly to the Boiler Return connection.
3. The system supply must be piped directly to the Boiler Supply connection.
4. The heat exchanger in the Indirect Tank (by others) shall be piped as a separate zone. The power for the
pump (by others) and its control is provided by the Boiler Control. Hot water priority is also provided by the
Boiler Control.
5. Install a minimum of 12 diameters of straight pipe upstream of all circulators.
6. Manufacturer strongly recommends the use of an anti-scald mixing valve at the hot water outlet of the
Indirect Tank to reduce the potential for scalding. Check with local codes.
7. The tank aquastat or DHW sensor connects back to the DHW sensor terminals. Use parameter
39 in Section 5.7 to dene aquastat or DHW sensor setting to the boiler.
8. Connect the Outdoor Sensor (OS) for outdoor reset operation to the O/S terminals.