Steffes 9180 - Manual (Page 21)

installa
tion
installa
tion
T
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ydronic
i
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 3.11 i
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 3.10 T
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ydronic
FREEZE PROTECTION: Risk of property damage. Hydronic
heating system freeze-ups WILL cause extensive damage to
the entire heating system and/or property. It is the responsi-
bility of the installer to provide protection against freezing.
PIPING SUPPORT: Risk of equipment damage or personal
injury. DO NOT use the exchanger as support for piping.
Support brackets should be in place to ensure proper op-
eration of the system and to keep pressure off the inlet and
outlet piping.
CAUTION
Heat Exchanger Flow and Restriction Properties
gPM Velocity (Feet/Sec)
Restriction 150° Water
(Feet of Heatd)
Restriction 80°
50% Propylene glycol
(Feet of Head)
5 0.6 0.1 0.2
10 1.2 0.3 0.6
15 1.8 0.7 1.3
20 2.4 1.2 2.1
24.5 3 1.7 3.1
25 3.1 1.7 3.2
30 3.7 2.4 4.5
Capacity 3.4 Gallons
Maximum Flow 30 GPM
Tubing Material Copper
Maximum Outlet
Water Set Temperature
180°F
HEAT EXCHANGER SPECIFICATION
2" MINIMUM
HEATING
VALVE
CHECK
UP15-42F
LOOP
PRIMARY
PUMP
ZONES
TO
2" MINIMUM
BALANCING
VALVE
FROM
HEATING
ZONES
9180
9180
9150
9150
MULTIPLE UNITS SySTEM PLUMBINg WITH MaSTER LOOP
FIgURE 13
NOTES:
1. Check valves on the return side are recommended to
prevent back flow into the furnace.
2. Balancing valves are recommended to provide an even
flow of water between all units.
3. Flow must continue for a minimum of 30 seconds after
call for heat ends.