13
EUTECTIC EC-10 DV
APPENDIX A
THERMOSTATIC BYPASS VALVE
TYPICAL MOUNTING
TYPICAL RETURN VALVE MOUNTING
TO SYSTEM
FROM SYSTEM
BOILER
SIZE
25 mm (1") NPT (female x female)
32 mm (1-1/4") NPT (female x female)
38 mm (1-1/2") NPT (female x female)
S/F PART NO.
116040
116041
116042
OPEN TEMP.
46 ºC
115 ºF
46 ºC
115 ºF
46 ºC
115 ºF
A
107 mm 4.2"
114 mm 4.5"
119 mm 4.7"
A/2
53 mm 2.1"
57 mm 2.25"
60 mm 2.
35"
Cv
10.5
16.4
20.2
Kv
8.96
13.99
17.23
WEIGHT
1.5 kg
3.3 lb
2.0 kg
4.4 lb
2.4 kg
5.3 lb
Max. operating pressure 6 bar (85 psi) Maximum operating temperature 110°C (230°F)
The flow factor Kv is the number of cubic meters per hour of water at 20°C which will flow through the valve with a pressure drop of 1kg/cm
2
(1 bar).
The flow coefficient Cv is the flow of water at 60°F in US gallons per minute at a pressure drop of 1lb/in
2
across the valve.
Thermostatic bypass valves type TV are designed to allow
boilers to reach their optimum operating temperature
quickly and to prevent cool/cold return temperatures from
affecting them.
Operation/Installation: The thermostat within the "TV" valve
allows full flow through the bypass until the predetermined
temperature is reached.
Start Up: With the balancing valve on the bypass fully
open, operate the boiler until it reaches its normal
operating temperature. If hot water does not automatically
flow to the system then adjust (throttle) the bypass
balancing valve until flow (hot water) to the system is
established. If flow is already to the system, no adjustment
is required.
When mounted on the return "TV" allows full bypass until the
return temperature reaches 46 degrees Celsius (115 degrees
Fahrenheit). "TV" will begin opening while main taining a 46
degrees Celsius (115 degrees Fahrenheit) minimum return
temperature. When return temperatures reach approximately
54 degrees Celsius (130 degrees Fahrenheit) most of the flow
will be through the system.
Mounting: "TV" can be installed in any position. An adjust able
balancing valve (or ball valve) must be installed on
the bypass.
APPENDIX B
THERMOSTAT HEAT ANTICAPATOR SETTINGS
Fixed anticipator thermostats are not adjustable.
Adjustable anticipator thermostats, depending on thermostat
model, may be adjustable from a .18 to a .9 setting by moving
a pointer on the anticipator.
The higher the anticipator setting (towards .9) the longer it
will take for the thermostat to respond to a change in room
temperature. Too high a setting and the boiler will be slow to
respond to a temperature change in the room. This can
cause the room temperature to drop to an uncomfortable
level before the boiler starts. This may generate homeowner
complaints.
The lower the anticipator setting (toward .18) the faster the
thermostat will respond to a change in room temperature. Too
low a setting and the boiler will short cycle. Boiler short
cycling will cause unnecessary wear on the equipment and in
the case of oil boilers it can lead to poor combustion and
more frequent cleaning of the combustion area.
It is important to understand what the thermostat is controlling
and then determine the amp rating of that relay, gas valve,
zone valve or control. This information is usually stamped
somewhere on the component. A properly set anticipator will
allow the system to operate at its maximum effectiveness.
APPENDIX C
USE OF NON-OXYGEN DIFFUSION BARRIER UNDERFLOOR TUBING
The boiler warranty does not cover leaks resulting from
corrosion caused by the use of underfloor plastic tubing
without an oxygen diffusion barrier. Systems must have the
non-oxygen diffusion barrier tubing separated from the boiler
with a heat exchanger, Slant/Fin recommends the use of
underfloor plastic tubing with an oxygen diffusion barrier.
Other system components may also require protection from
oxygen permeation.
