Heat Link 31360, Manual

Page: 26 / 44

HeatLink
®
Mixing Valve Reset Control Stk# 31360
®
Link Heat
www.heatlinkgroup.com
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TECH 5.2
2 Circuit (Fully Modulating Fl. Ht. plus indirect Fired Storage Tank)
Application: 4-Way Mixing
Cast iron high mass boiler c/w 2 circuits
(one low temp. circuit - fully automatic modulating water temp.)
(one high temp. circuit for domestic indirect fired hot water heater)
Note:
• Air vents, expansion tanks, pressure relief valves etc. For boiler as per local codes.
• Drawings are for HeatLink
®
suggested system layout only. User must determine if system layout will work for their particular application!
• Use isolation ball valves for all circuits and components.
Control Sequence:
• Indoor/outdoor control unit provides primary control for the HeatLink
®
radiant floor system. By correlating outside air temperature, supply wa -
ter temp. & (Optional) room temperature the control unit then activates the 4-way mixing valve motor which in turn modulates the supply water
temperature to the floor. Secondary control is provided by individual room thermostats operating zone drive motors.
(See elect 1.2 & 1.3) (For rough-in wiring instructions using StatLink ® controls see elect 1.8 & 1.9)
• Boiler to fire either: 1) independently on its own operating controls or 2) by activation through a relay of the indoor/outdoor controls. Application
to use option (____).
• Primary pump (P-2) to be wired in series with water heater aquastat (24v wiring) and zone valve (see elect 5.2 For schematic). Aquastat to be set
at a maximum of 130°f to prevent scalding.
• Pumps (P-1, P-2) to be wired directly with their own disconnect switches. System pump P-1 to operate either: 1) continually or 2) by activation
through a relay of the indoor/outdoor controller (see elect 5.2)
For this particular application P-1 & P-2 to operate as per option (_____).
4 Way
Mixing Valve
Mixing Valve Motor
P-3
IF Aquastat
P-1
Note: • To maintain proper flow through boiler, piping MUST be completed as shown. ie.
IFHWH supply & return connections to be tied in BEFORE the mixing valve!
• Thermal traps must be used to prevent uncontrolled heat-up from hot water migration.
(drop piping a minimum of 16")
Return/Supply tie-in to
be maximum 4 pipe
diameters apart (see
notes below)
Temperature Gauge
1/2" Water Make Up
Back
Flow
Preventer
Auto Float
air vent
Expansion
Tank
High
Limit
Aquastat
Indoor/Outdoor
Controller
Auto Float
air vent
IFHWH
Outdoor
Sensor
Supply
Sensor
(Note: The manifold at the
highest location should be
equipped with an air vent)
Optional room thermostats
& zone motors
(see ELECT 1.2-1.3 for
rough in instructions)
Manifold 1
Manifold 2
Manifold 3
Install ball valves at all
manifolds (Allow spacing for
future zone valves!)
Boiler
P-2
(Optional pressure activated bypass
valve required if multiple thermostats
and zone motors are used)
Flow Balancing
Globe Valve
Flow Balancing
Globe Valve
Flow Balancing
Globe Valve
Sidestream
Filter