Slant/Fin EUTECTIC EC-13A Installation And Operating Instructions Manual page 18

18
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
TYPICAL MOUNTING
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)
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
The flow coefficient Cv is the flow of water at 60°F in US gallons per minute at a pressure drop of 1lb/in
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 tempera-
ture. Too high a setting and the boiler will be slow to respond to a
temperature change in the room. This can cause the room tem-
perature to drop to an uncomfortable level before the boiler
starts. This may generate homeowner complaints.
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,
THERMOSTATIC BYPASS VALVE
S/F PART NO. OPEN TEMP .
116040 46 ºC
116041 46 ºC
116042 46 ºC
THERMOSTAT HEAT ANTICIPATOR SETTINGS
USE OF NON-OXYGEN DIFFUSION BARRIER UNDERFLOOR TUBING
APPENDIX A
flow (hot water) to the system is established. If flow is already to
the system, no adjustment is required.
Return Mounting: 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.
TYPICAL RETURN VALVE MOUNTING
TO SYSTEM
FROM SYSTEM
A
115 ºF 107 mm 4.2" 53 mm 2.1"
115 ºF 114 mm 4.5" 57 mm 2.25"
60 mm 2. 35"
115 ºF 119 mm 4.7"
APPENDIX B
The lower the anticipator setting (toward .18) the faster the ther-
mostat 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 clean-
ing 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
Slant/Fin recommends the use of underfloor plastic tubing with an
oxygen diffusion barrier. Other system components may also
require protection from oxygen permeation.
EUTECTIC EC-10
BOILER
A/2 Kv Cv
8.96 10.5
13.99 16.4
17.23 20.2
2
across the valve.
WEIGHT
1.5 kg 3.3 lb
2.0 kg 4.4 lb
2.4 kg 5.3 lb
2 (1 bar).