33
Section 6 - System Installation
1" Central PEX
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1" Copper Piping
Return to Outdoor Furnace
Optional Thermostatic Valve
Mixing Valve
Insulation
Insulation
Poly Vapor
Barrier
Slab
1/2" Central PEX
Piping is spaced
6" from outside wall. Remaining piping
is spaced 12" on center.
Sheet Rock
Minimal
heat radiated
downward
PEX Hangers should be installed every 18".
It is recommended that you maintain a 2" cavity
between piping and insulation for best performance.
Floor Joist
Floor Covering
Sub Floor
2" Minimum
1/2" Central PEX Piping
Insulation
Underlayment
Heating Upper Level
Hot Supply from Pump on
Outdoor Furnace
p/n 8200008
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R W X X R C
P
N
H
R
W
Zoning Pump
ON / OFF switch must
be in the "ON" position
for this install.
NOTE
FAN
TIME PRGM RUN HOLD
SYSTEM
COOL
ON AUTO
OFF HEAT
NOTE
Outdoor furnace water
temperature setpoint should
be set at 185˚F minimum.
NOTE
A pump must be installed in the hot
supply line between the outdoor furnace
and thermostatic valve.
NOTE
Installer must comply with all applicable
codes and regulations.
RC
Y
W
B
R
O
RH
G
W
24-Volt Thermostat
Multi Zone In-Floor
Fig. 42
H
C
M
R
Plenum
Forced Air
Furnace
Water
Heater
Zoning
Pump
This horizontal
assembly must not
exceed a height
of 4 inches above
top of water heater.
Water-to-Water
Heat Exchanger
Bypass
Line
NOTE
Installer must comply with all applicable
codes and regulations.
1"
Central
PEX
®
Hot Supply
Optional 3-Way
Bypass Valve
Thermostatic
Mixing Valve
NOTE
4 x Pipe Dia. Max.
(e.g., for 1" pipe, fittings must
not be more than 4" apart)
For illustration purposes only:
• Water heater styles may vary.
• Size of incoming line may vary
(depending on application).
• Location of thermostat may vary.
NOTE
If heating loops are above manifolds,
additional controls (e.g. zone valve or
flow check) may be needed to prevent
ghost flow (see Radiant Heat with
Flow-Check Valve illustration).
Hot Supply from Pump
on Outdoor Furnace
Return to Outdoor Furnace
Optional
Thermostatic Valve
NOTE
Outdoor furnace water
temperature setpoint should
be set at 185˚F minimum.
NOTE
A pump must be installed in the hot
supply line between the outdoor furnace
and thermostatic valve.
(In Floor Radiant / Forced Air)
Dual System
Fig. 43