STATIC PRESSURE
(Feet Water Column)
Based on 80 degree entry
water temperature with
a 50% glycol mix.
.1 ft @ 2 GPM
.2 ft @ 4 GPM
.4 ft @ 6 GPM
.7 ft @ 8 GPM
1.1 ft @ 10 GPM
PRESSURE DROP THROUGH
HEAT EXCHANGER
TYPICAL FLOOR ZONE DESIGN
Maximum Length of Pipe per Pipe Size
3/8"
200'
1/2"
300'
5/8"
500'
(Pipe length will vary by manufacturer.)
TYPICAL SYSTEM PLUMBING
SINGLE TEMPERATURE ZONES
FIGURE 15
Air Vent
Air Separator
Inlet
Outlet
Zone
Connection
Area
Pressure
Relief Valve
(Factory Supplied)
Primary Loop Pump
Control Wiring
(White & Red)
Junction Box
(Factory Supplied)
*Primary
Loop
Pump
Expansion
Tank
Piping MUST
Be Supported
Optional
Temperature and
Pressure Relief Valve
(Consult Local Code)
TYPICAL PRIMARY LOOP
FIGURE 14
PUMP SPECIFICATIONS
•
Steffes recommends a Grundfos UP15-42F single speed 115VAC pump for the primary pump.
•
Air Handler pump should NOT be a split phase pump.
•
Air Handler pump should NOT have any type of auxiliary control built into or onto the pump.
White
Red
Primary Loop
Secondary Loop
Primary
Loop Pump
C
Hydronic
Exchanger
This Valve Must
Be Open During
Normal Operation
White
Red
FREEZE PROTECTION: Risk of frozen pipes. Can cause property damage. Hydronic heating system
freeze-ups WILL cause extensive damage to the entire heating system and/or property. It is the re-
sponsibility of the installer to provide protection against freezing.
PIPING SUPPORT: Risk of exchanger damage. Can cause property damage or personal injury. DO
NOT use the exchanger as support for piping. Support brackets should be in place to ensure proper
operation of the system and to keep pressure off the inlet and outlet piping.
CAUTION
In
st
al
la
ti
on
Comfort Plus Hydronic
Installation
3.12
