Laars MASCOT FT MFTCW Installation And Operation Instructions Manual page 39

Mascot FT Combination Boiler
SECTION 4. Installation
4.14 Plumbing Guidelines
Zoning with zone valve
- In a valve based system, there is one circulator pump at the boiler and each heating zone has a zone
valve which opens when the zone.
- Each thermostat is wired directly to the corresponding zone valve. Contacts in the zone valves provide a
proper signal to the boiler when the valve is opened.
PRIMARY/SECONDARY
Expansion tank
(Diaphragm-type)
Automatic air vent
Air separator
Circulation pump
Check valve
Drain valve
Gate valve
Backflow preventer
Pressure Relief Valve
CH SUPPLY
PRIMARY LOOP
(SPACE HEATING)
CONNECTION
SECONDARY LOOP (SPACE HEATING)
FLOOR HEATING
DHW OUTLET
CH RETURN
Do not exceed 12" apart
ZONE 1
ZONE 2
ZONE 3
DHW INLET
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