Steffes 5140 Simplified Installation Guide - Manual (Page 5)

TYPICAL SYSTEM PLUMBING
(SHOWN WITH STEFFES AIR HANDLER)
It is the responsibility of the installer to prevent involuntary flow of water to the air handler. Not doing
so may cause limit tripping and/or decrease system efficiency. Use of a check valve, zone valve, or
other device may help prevent involuntary flow.
Secondary Loop
Low Temp Radiant Zones
CHECK
VALVE
White
Orange
White
Black
Primary
Loop Pump
High Temp
Water
5100 Air
Handler
To
Other
Zones
Mixing
Valve
This Valve Must
Be Open During
Normal Operation
From
Other
Zones
Comfort +
Hydronic
Exchanger
Red
White
-
-
+
Primary Loop
11
PRESSURE RELIEF VALVE INSTALLATION
Risk of explosion, injury, or death. The factory
supplied pressure relief valve MUST be
connected to the system with the supplied
fittings.
w DO NOT modify this assembly.
w DO NOT cap, plug, or otherwise
obstruct the outlet of the pressure
relief valve.
w DO mount the pressure relief valve in
a vertical, upright position.
w This pressure relief valve is sized to
service the needs of the Comfort Plus
Hydronic system. If multiple heating
systems are being used, pressure
relief valving for the other system
MUST be provided separately.
1. Remove the heat exchanger access panel and locate the
pressure relief valve assembly.
2. Using the supplied union fittings, connect the pressure relief
valve to the outlet water port on the left side of the Comfort
Plus Hydronic system.
3. Use schedule 40 pipe to install a discharge line for the pressure
relief valve.
4. Install heat exchanger access panel.
Risk of injury or property damage. During operation, the
pressure relief valve may discharge large amounts of
steam and/or hot water. To reduce the potential for bodily
injury or property damage, install a discharge line.
w DO use schedule 40 pipe for the discharge line.
w DO NOT use schedule 80, extra strong pipe
or connections on the discharge line.
w DO NOT cap, plug, or otherwise obstruct the dis-
charge pipe outlet.
w DO follow all local, state, and national codes and
regulations.
WARNING WARNING WARNING WARNING WARNING
WARNING WARNING WARNING WARNING WARNING